JP3899232B2 - belt conveyor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a belt conveyor formed by arranging a plurality of belt conveyors (conveyance paths) in parallel.
[0002]
[Prior art]
Conventionally, when installing a plurality of belt conveyors in parallel, a plurality of belt conveyors each having a drive source are installed in parallel.
In addition, as described above, in order to run the conventional belt conveyor normally, special processing such as crowning is applied to the dry pulley and tail pulley to prevent belt meandering, and adjustment is also performed for each belt. It was necessary to provide a mechanism for adjusting the belt tension.
In the conventional belt conveyor as described above, what is particularly problematic is that the adjustment amount differs for each belt, so that meandering adjustment and tension adjustment are very difficult. Therefore, conventionally, when a plurality of belts are used in parallel as described above, the width of the belt is limited to a narrow specification that is difficult to meander, or each belt is provided with a rail for preventing meandering. Installation, dealing with the meandering of each belt.
[0003]
[Problems to be solved by the invention]
As described above, when multiple rows of belts are used in parallel, it is necessary to perform necessary processing on the dry pulley and tail pulley to prevent the belt from meandering, and the work to be performed for each belt is also difficult. .
In addition, since one drive device is provided in one conveyor body, the manufacturing cost is high, the installation space is widened, and these improvements have been demanded.
[0004]
The present invention has been made in view of the above-described conventional circumstances, and relates to a belt conveyor that drives a plurality of rows of belts in parallel by preventing meandering of each belt and at the same time rationally simplifying the structure. Another object of the present invention is to provide a belt conveyor that can reduce the manufacturing cost.
[0005]
[Means for Solving the Problems]
As described above, the belt conveyor of the present invention integrally constitutes a conveyor body having a plurality of conveying paths, that is, a plurality of belts arranged in parallel. A pair of rollers (or knife edges) for laying the belt of each conveyance path is provided at both ends of the conveyor body. An endless belt is installed between these rollers. Each belt spanned between the rollers is supported from below by a planar support surface of the frame, and a plurality of forward paths of belts constituting a plurality of transport paths are in parallel.
[0006]
A drive roller is pivotally supported between the left and right side portions of the conveyor at the lower portion of the conveyor body, that is, on the return path side of each belt. This drive roller is driven and rotated by a single drive source. Further, the return path side of a plurality of belts constituting each conveyance path is wound around the outer periphery of the lower surface side of the drive roller.
A pair of snap rollers are disposed on one side and the other side of the outer periphery of the driving roller, and are supported so as to be able to contact and separate from the outer peripheral surface of the driving roller. Then, both snap rollers are constantly pressed against one side and the other side of the outer periphery of the driving roller by the biasing force of the biasing means, and the belt on the return path wound around the outer periphery of the driving roller is brought to the outer peripheral surface of the driving belt. Keep in a crimped state.
Therefore, the rotationally driving the driving roller, transmitted to the belt driving force is pressed against the outer peripheral surface of the drive roller, simultaneously rotationally driven by the dynamic rollers plurality of belt drive.
[0007]
The drive roller is divided for each range in which the belt of each conveyance path is wound, and is individually supported by a shaft in a state where these divided rollers are concentric. In other words, the drive roller is configured by arranging a plurality of divided rollers that rotate individually on the same axis.
A fixed gear is provided at each shaft end of the split roller. This fixed gear rotates integrally with the split roller.
Moreover, since the intermediate gear is interposed between the fixed gears provided at the shaft end portions of the adjacent split rollers, the rotation direction of the adjacent split rollers is reversed via the intermediate gear. That is, the belt adjacent to the forward rotating belt rotates in the reverse direction.
The description of the belt conveyor according to claim 2 will be made in the column of the embodiment of the invention.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
The conveyor shown in FIGS. 1 and 2 is a center drive type belt conveyor A, and two belts 3a and 3b are stretched over a wide frame 1 so that the two conveyance paths a1 and a2 are arranged in parallel. It is configured.
The conveyor main body a of the belt conveyor A is formed by integrally forming a frame 1 formed widely so as to arrange two conveyance paths a1 and a2 by extrusion molding of aluminum. The above-described frame is not limited to the extrusion-molded one, and any existing structure may be used.
The frame 1 forms a flat support surface 1a for fully supporting the two belts 3a, 3b constituting the transport paths a1, a2 from below, and is parallel along the left and right sides of the support surface 1a. The extending crosspiece 1b is formed integrally.
The above-described frame 1 supports two belts 3a and 3b arranged in parallel from the bottom by a flat support surface 1a.
[0009]
Two end rollers 2a and 2b for turning are pivotally supported at both ends on the one end side and the other end side of the frame 1 at positions corresponding to the transport paths a1 and a2, respectively. Both belts 3a and 3b formed endlessly between 2b are respectively wound around. The tail rollers 2a and 2b described above are straight rollers having a constant outer diameter. However, the tail roller described above may be a crowned one.
Further, the shaft support member 2c that supports the tail rollers 2a and 2b is not provided with a tension adjusting mechanism for adjusting the tension of the belts 3a and 3b. This is because the tension of the belts 3a and 3b can be maintained by the drive unit C described later.
[0010]
The forward side of the two belts 3a and 3b wound around the tail rollers 2a and 2b at both ends of the conveyor body a is supported from the lower side by the support surface 1a of the frame 1, thereby maintaining a horizontal plane. . Further, the return path sides of both belts 3a and 3b are drawn into a drive unit C installed in a manner protruding downward in the approximate center of both frames 1.
Both belts 3a and 3b are wound around the lower surface side of the driving roller 7 included in the driving unit C, and pressed from both sides by the snap rollers 8a and 8b. As a result, the belts 3a and 3b are in close contact with the outer peripheral surface of the driving roller 7, and the driving force of the driving roller 7 is transmitted to the belts 3a and 3b, so that both the belts 3a and 3b are driven to rotate (FIG. 3).
[0011]
As described above, the support plates 53a and 53b attached and supported so as to hang down on the return path side of the conveyor body a are provided with bearing portions 54a and 54b for supporting the drive roller 7, respectively, between them. The drive roller 7 is horizontally supported and rotatably supported (FIG. 4).
One end of the support shaft 7b of the drive roller 7 penetrates the bearing 54a and protrudes outward, and a timing pulley 71 is attached to the protrusion. A drive motor 4 with a speed reducer 4a is mounted next to the timing pulley 71 (FIGS. 1 and 2).
[0012]
A timing pulley 41 is attached to the output shaft of the speed reducer 4a, and the timing pulley 41 and the timing pulley 71 of the drive roller 7 are connected by an endless timing belt 43. Therefore, when the drive motor 4 is driven to rotate, this driving force is transmitted to the drive roller 7, and the drive roller 7 is driven to rotate at a predetermined rotational speed. Then, the drive of the drive roller 7 is transmitted to the two belts 3a and 3b and rotates simultaneously. That is, the belt conveyor A of the present embodiment can drive the two belts 3a and 3b simultaneously by one drive motor 4.
In addition, since a plurality of belts are rotationally driven by a single drive motor, the installation space for the drive source can be reduced, and as a result, the belt body a can be made compact. In this embodiment, a timing pulley is used as power transmission means between the output shaft of the reduction gear and the drive roller. However, this power transmission means may use means other than the timing pulley, such as a pulley and a V belt, a sprocket and a chain, or the like.
[0013]
The return paths of the belts 3a and 3b are wound around the outer periphery of the lower surface of the drive roller 7 (FIG. 3). Further, a pair of support arms 9a and 9b are arranged at positions where the belts 3a and 3b on both sides of the driving roller 7 are wound around. That is, two sets of support arms 9a and 9b are installed.
Snap rollers 8a and 8b are pivotally supported at the front ends of the support arms 9a and 9b, respectively, and the rollers are disposed on one side and the other side of the drive roller 7, respectively. Then, the drive rollers 7 wound around the return paths of the belts 3a and 3b are sandwiched from both sides and elastically pressed by both snap rollers 8a and 8b.
[0014]
On the other hand, the pair of snap rollers 8a and 8b attached and supported at the tip ends of the support arms 9a and 9b are configured to abut on the upper surface side of the outer periphery of the drive roller 7 as shown in FIG. The lower ends of the support arms 9a and 9b are bent in a substantially arc shape toward the center as in the case of the upper ends, and the lower ends of the bent portions are in the support recesses 11 of the support 10 described later. A pivotal support body 20 having a substantially Ω-shaped cross-section that fits into is integrally projected.
The support portion 10 is a portion that rotatably supports the lower ends of the support arms 9a and 9b, and a gap 10b that rotatably holds the cam 30 is provided at the center thereof (FIGS. 3 and 3). 4). Both support portions 10 have support recesses 11 formed therein. Both support recesses 11 are substantially C-shaped recess grooves whose upper surfaces are open, and are formed as arc-shaped grooves having a diameter that is slightly larger than the outer diameter of the pivotal support body 20 of both support arms 9a and 9b. .
[0015]
A bush 21 made of a synthetic resin such as polyethylene and having a predetermined thickness is fitted inside the support recess 11 provided in the support portion 10. Then, by inserting the pivotal support body 20 of the both support arms 9a and 9b into the support recess 11 and fitting it inside the bush 21, the lower portions of both arms 9a and 9b are rotated in the support recess 11. Supports movable.
In addition, cam contact portions 31 are integrally projected toward the center of the support portion 10 at the distal ends of the bent portions at the lower ends of the support arms 9a and 9b, and the outer peripheral surface of the cam 30 is abutted against these lower surfaces. The contact surface 31a which contacts is formed (FIG. 3).
[0016]
A cam 30 having an outer peripheral shape as shown in FIG. 4 is fitted directly below the cam contact portion 31 of the support arms 9a and 9b protruding toward the center of the support portion 10, and is pivotally supported. It is. The cam 30 is formed using a synthetic resin such as polyethylene and the like, and a support shaft 32 is horizontally passed through a predetermined portion of the side surface so as to be rotatable.
A mounting shaft 62 is fastened to both the supporting arms 9a and 9b, and a coil spring 60 is hooked between the mounting shafts 62, and both the supporting arms 9a and 9b are utilized by utilizing the restoring force of the coil spring 60. The urging force is applied so that they approach each other (FIG. 4).
[0017]
In the belt conveyor A configured as described above, when removing the belts 3a and 3b, the cam 30 is operated. That is, an outer diameter bar 34 or a plus driver is inserted into the hole 33 formed in the outer periphery of the cam 30 and rotated 90 ° in the forward direction. As a result, the cam 30 stops rotating while the outer peripheral surface of the cam 30 pushes up the contact surfaces 31a of the operating arms 9a and 9b and is in contact with the contact surfaces 31a of the operating arms 9a and 9b. This operation is similarly performed on both the belt 3a side and the 3b side.
[0018]
In this state, the uppermost level of the cam 30 moves upward by a predetermined amount against the urging force of the coil spring 60. As a result, both the operating arms 9a and 9b are expanded, and the distance between the two snap rollers 8a and 8b at the front end is wider than the outer diameter of the drive roller 7, that is, both the belts 3a and 3b can be loosened and removed. A state is reached (imaginary line in FIG. 3).
[0019]
On the other hand, when the removed belts 3a and 3b are mounted, both the operating arms which have been opened by releasing the urging force of the cam 30 by rotating the cam 30 by 90 ° in the reverse direction. 9a and 9b and both the snap rollers 8a and 8b are attracted again by the urging force of the coil spring 60, and return to the operating state shown in FIG.
That is, the attaching and detaching operations of the belts 3a and 3b can be performed very easily.
[0020]
In the belt conveyor A configured as described above, the snap rollers 8a and 8b of the operating arms 9a and 9b provided for the belts 3a and 3b respectively are applied to the belts 3a and 3b wound around the outer periphery of the drive roller 7. Press contact. Then, when the drive roller 7 is driven and rotated, the belts 3a and 3b rotate in a synchronized state by the frictional force generated between the belts 3a and 3b, and are transported placed on the parallel transport path a1 or a2. Objects are conveyed from the beginning to the end of the conveyor.
In addition, the conveyance speed of each belt can be arbitrarily changed by changing the diameter of the drive roller 7 described above partially or over the entire length. It is also possible to use belts having different widths by changing the width of the snap roller.
[0021]
Further, the above-described snap rollers 8a, 8b are set to be narrower than the widths of the corresponding belts 3a, 3b, and the belts 3a, 3b in which the snap rollers 8a, 8b are always wound around the outer periphery of the drive roller 7. , The tension applied to both sides of the belts 3a and 3b during the operation can be applied in a stable direction, thereby effectively preventing the meandering motion generated in the belt during the operation. it can. Therefore, the belt conveyor A does not require special processing such as crown processing on both tail rollers 2a and 2b, and can be sufficiently handled by straight rollers.
The meandering prevention mechanism of the belt by the snap roller is exactly the same as the main structure, operation, and effect of the belt conveyor described in Japanese Patent Application No. 2000-90482 filed by the applicant of the present application.
[0022]
Further, the tension action generated by the pressing of the snap rollers 8a and 8b can always give an appropriate tension to the belts 3a and 3b. Therefore, the belt conveyor A of the present embodiment does not cause any trouble without providing a tension adjusting mechanism in the shaft support structure of the tail rollers 2a and 2b, and is maintenance-free with respect to adjusting the tension of the belts 3a and 3b.
The tail rollers 2a and 2b described above may be replaced with knife edges, and even in this case, the above-described meandering prevention function can be effectively exhibited.
[0023]
Next, the belt conveyor A2 shown in FIGS. 6 and 7 will be described.
The belt conveyor A2 is configured in the same manner as the belt conveyor A1 described above, but the driving roller 70 is divided at the center to form divided rollers 70a and 70b, and the two divided rollers 70a and 70b are coaxial. It is configured by placing it on top. Further, bevel gears 72a and 72b are attached to the ends of the support shafts 71a and 71b of the split rollers 70a and 70b, respectively, and an intermediate gear 73 is interposed between the bevel gears 72a and 72b to The gears 72a and 72b are meshed with each other.
[0024]
The intermediate gear 73 is rotatably supported in a state in which the intermediate gear 73 faces downward at the center portion of the support column 75 laid between the support plates 53 a and 53 b on both sides of the frame 1. Further, the support shafts 71a and 71b of both the split rollers 70a and 70b are horizontally supported between the support plate 53a and the support member 56a and between the support plate 53b and the support member 56a. The bevel gears 72a and 72b are attached and fixed to the end on the center side so as to face each other. Between the bevel gears 72a and 72b, the above-described intermediate gear 73 is engaged from above, and the power between the bevel gears 72a and 72b is transmitted.
[0025]
Further, as described above, by interposing the intermediate gear 73 between the bevel gears 72a and 72b, the rotation directions of the split rollers 70a and 70b integrated with the bevel gears 72a and 72b are reversed. That is, this belt conveyor A2 can reverse the conveyance directions of the conveyance paths a1 and a2. In this way, the belt conveyor A in which the transport paths a1 and a2 are arranged in parallel and the transport directions are opposite to each other is preferably used as a cooling line, an aging line or the like by combining with the turn conveyor D (FIG. 8- a, FIG. 8-b).
Further, the belt conveyor A2 described above has the width of the frame 1 increased by the provision of the intermediate gear 73, so that an inspection device or the like can be installed between the belts 3a and 3b.
[0026]
In the belt conveyors A and A2 of the above-described embodiment, the two belts 3a and 3b are provided. However, according to the gist of the present invention, the number of belts, that is, the number of conveying paths is two or more. For example, three belts may be juxtaposed as in the belt conveyor A3 shown in FIG. 5, or four or more belts may be juxtaposed to constitute the conveyance path.
Further, when the belt conveyor is configured by arranging three belts in parallel, for example, the conveyance direction of the two belts and the conveyance direction of the remaining one belt can be reversed.
[0027]
【The invention's effect】
As described above, the belt conveyor of the present invention includes an integral conveyor main body that constitutes a plurality of conveyance paths and a single-drive driving roller, and a pair of snap rollers and a belt by an urging means. Since the belt is always pressed against one side and the other side of the outer periphery of the driven roller and the return path side of each belt is crimped to the outer peripheral surface of the drive roller. The driving force can be transmitted to each belt to be pressure-bonded to the outer peripheral surface of the driving roller, and each belt constituting the plurality of conveying paths can be simultaneously driven to rotate by one driving roller.
Therefore, the belt conveyor of the present invention is a conventional conveyor body and a plurality of belts arranged on the conveyor body at the same time while driving the driving roller by a single driving source. Compared with the conventional one, the manufacturing cost can be greatly reduced by the simplification of the structure by unifying the driving source and the accompanying one. Further, since constant tension can be constantly applied to each belt by the urging force of the snap roller, there is no need to provide a special belt tension mechanism, no belt tension adjustment work, and no maintenance.
[0028]
The single drive drive roller is divided into portions corresponding to the respective conveyance paths, and these divided rollers are configured to be pivotally supported in a state of being coaxially arranged, and the shaft end portions of the adjacent divided rollers. Since the intermediate gear is interposed between the fixed gears fixed to each other, a plurality of belts arranged on the conveyor main body by driving each divided roller by an integral conveyor main body and one drive source Can be rotated simultaneously, and further, it is possible to reversely rotate between adjacent belts.
Therefore, the belt conveyor of the present invention, it is possible greatly reduce the manufacturing cost by simplifying the structure, the biasing force of the snap roller, it becomes possible to provide a constantly constant tension to each belt, specially belt No tension mechanism, no belt tension adjustment work, and maintenance-free.
In addition, the belt conveyor of the present invention can be suitably used particularly for turn lines, aging, and cooling lines because the belt conveyor reverses between adjacent belts.
[0029]
In the belt conveyor according to claim 2, as described above, the snap roller pivotally supported on the tip of the support arm is brought into contact with one side and the other side of the outer periphery of the drive roller around which the belt of each conveyance path is wound. The urging force of the urging means is configured so that these snap rollers are always pressed against one side and the other side of the outer periphery of the driving roller around which the belt is wound. A constant tension can be constantly applied to the belt. Therefore, it is not necessary to provide a special tension mechanism for applying tension to each belt, and the tension adjustment work for the belt is very easy.
Further, by making the width of the snap roller narrower than the width of the belt, it has a function of quickly converging the meandering of the belt that occurs when the driving rotating belt receives an external force. Therefore, there is an advantage that it is not necessary to perform special processing such as crowning, limiting the width of the belt, and providing a belt for preventing meandering on the belt on the rollers and driving rollers provided on both ends of the conveyor body.
[Brief description of the drawings]
FIG. 1 is a plan view showing a belt conveyor embodying the present invention.
FIG. 2 is a side view showing the belt conveyor.
FIG. 3 is a longitudinal side view showing a driving roller portion of the belt conveyor.
FIG. 4 is a longitudinal front view showing a driving roller portion of the belt conveyor.
FIG. 5 is a plan view showing a belt conveyor having three conveyance paths.
FIG. 6 is a plan view showing a belt conveyor having different conveyance directions between conveyance paths.
FIG. 7 is a longitudinal front view showing a driving roller portion of the belt conveyor.
8A is a plan view showing an aging line configured using the belt conveyor and the turn conveyor of the present application, and FIG. 8B is a plan view showing a cooling line configured using a plurality of the belt conveyors.
[Explanation of symbols]
A, A2, A3 ... belt conveyor a ... conveyor main body a1, a2 ... transport path 1 ... frame 1a ... bearing surfaces 2a, 2b ... tail rollers 3a, 3b ... Belt 4... Drive motor 7, 70 a, 70 b... Drive roller 72 a, 72 b... Bevel gear 73 .. intermediate gear 8 a, 8 b.

Claims (2)

Conveyor body comprising a plurality of conveying paths in parallel is integrally configured, and a pair of rollers are provided at positions corresponding to the respective conveying paths at both ends of the conveyor body, and an endless shape is provided between these rollers. A belt is erected, the forward path side of each belt is supported from below by a support surface on the upper surface of the conveyor body, and a plurality of conveying paths are arranged side by side, and a single drive roller is pivotally supported at the lower part of the conveyor body , The drive roller is divided for each conveyance path, and the divided rollers are axially supported in a state of being coaxially arranged, and fixed gears fixed to the shaft end portions of the adjacent divided rollers. An intermediate gear is interposed between the belt, the return path side of the belt of the conveying path is wound around the outer periphery of the lower surface of each corresponding divided roller, and a pair of snap rollers are arranged on one side and the other side of the outer periphery of each divided roller. Outside each split roller Provided with a biasing means that is supported so as to be able to contact with and separate from the surface, and constantly presses each snap roller to one side and the other side of the outer periphery of the divided roller, and a plurality of belts constituting a plurality of conveying paths are provided to each divided roller configuration the belt conveyor so as to rotated in a predetermined direction by. A pair of support arms is swingably disposed on one side and the other side of the outer periphery of the driving roller around which the belt of each conveyance path is wound, and the width of the support arm is narrower than that of the corresponding belt. Each snap roller is rotatably supported, and the snap roller is brought into contact with one side and the other side of the outer periphery of the drive roller, and is urged by a biasing means for biasing the support arms in a direction to bring them closer to each other. The belt conveyor according to claim 1, wherein the belt conveyor is always pressed against one side and the other side of the outer periphery of the driving roller .

Images