JP3561301B2 - Belt conveyor centering device - Google Patents

Description

[0001]
[Industrial applications]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt conveyor centering apparatus, and more particularly, to a belt conveyor centering apparatus that is extremely easy to install.
[0002]
[Prior art]
In general, a belt conveyor has carrier rollers on the upper side of a conveyor frame and return rollers on the lower side, each of which is arranged in a row in the longitudinal direction of the frame. The rollers support the empty return belts from above, i.e. from the back, so that they run in opposite directions. Further, there is a problem of belt meandering when the conveying path is relatively long, and in this case, usually, in this case, a centering device for aligning the belt to eliminate meandering or deviation is provided. In addition, this centering device is often additionally provided after the belt conveyor is laid.
[0003]
As shown in FIG. 6, the belt conveyor a has a pair of conveyor frames b supported on both sides in the width direction thereof, and a carrier roller c is provided above the conveyor frame b, ie, on the carrier side, and a lower side, ie, the return side. Are provided with return rollers (not shown) at predetermined intervals in the longitudinal direction of the frame. The carrier roller c supports the carrier belt d on which the article W is placed from below, while the return side of the belt conveyor a is positioned between the return rollers and at a position where the carrier roller c does not interfere. A centering device e is provided.
[0004]
The centering device e is of a so-called lambda type, that is, it has a centering roller g that supports both sides of the back surface of the return belt f from above with a predetermined trough angle θ. Briefly explaining the principle of the alignment, the belt f during running presses the alignment roller g on both sides, and if the belt fluctuates, the pressing reaction force increases as the contact area increases, and the belt of the pressing reaction force increases. Utilizing the component in the width direction, the belt f is restored to the original position by itself and the alignment is performed.
[0005]
The centering device e has a base h for passing the conveyor frame b across the back surface of the return belt f, and centering rollers g are provided on both sides of the base h. The centering roller g has a supporting member i for supporting both ends thereof. Since the position of the centering roller g is fixed, the supporting member i is formed integrally with the gantry h. Also, L-shaped mounting flanges j are integrally fixed to both side ends of the gantry h by welding or the like, and the mounting flanges j are engaged with the conveyor frame b from below and are bolted to adjust the alignment. The installation of the device e is performed.
[0006]
The aligning device e has a frame h for passing the conveyor frame b across the back surface of the return belt f, and extends diagonally downward on both sides of the frame h to support the alignment roller g. Extended portion i is integrally formed. An L-shaped mounting flange j is integrally fixed to both ends of the gantry h by welding or the like, and the mounting flange j is bolted to the conveyor frame b from below, whereby the centering device e is installed. .
[0007]
[Problems to be solved by the invention]
By the way, the widths of the belts d and f are standardized by the JIS standard, and the width of the conveyor frame b is appropriately determined according to the width. However, if it is large, the width of the conveyor frame b may be as large as 2 m or more. As a result, the centering device e also becomes large and weighs 100 kg or more, requiring many people for installation work, and There is a problem that takes time.
[0008]
That is, the conventional apparatus e is the fixed position of the alignment roller g, thus for the support member i is integral to the frame h, eggplant total width w ₁ of the support member i, from the minimum width w ₂ of the conveyor frame b Was also growing. For this purpose, the carrier roller c before and after the installation position is removed from the frame b, the device e is obliquely dropped into the conveyor frame b from above, and the mounting flange j is fixed to the conveyor frame b. Was attached. During such installation work, a relatively heavy centering device e must be held by a large number of people, and in some cases, conditions may be poor, such as the floor being located immediately below the frame b. Conventional installation requires time and labor. In addition, it is possible to insert and install between the conveyor frame b and the return belt f from the side, but the work is still troublesome because the device e is heavy.
[0009]
SUMMARY OF THE INVENTION An object of the present invention, which has been devised to solve the above-described problem, is to provide a belt conveyor centering device that can be easily installed and shorten the operation time.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, there is provided a support frame which is wrapped around a back surface portion of a return belt on a conveyor frame supported on both widthwise side portions of a belt conveyor , A pair of centering rollers for supporting the back surface at a predetermined trough angle, and a pair of support blocks attached to lower portions on both sides of the support frame to support the respective centering rollers, and a width dimension between the outer sides of the support blocks. In a belt conveyor alignment device formed to be larger than the inner width dimension between the conveyor frames, mounting flanges for attaching the support frames to the conveyor frames are provided at both ends of the support frames, and Drop the support frame from above between the conveyor frames and attach the mounting flanges at both ends of the After attaching by placing on Beya frame, in which a supporting block supporting the alignment rollers on each side lower portion of the support frame mounted detachably.
[0011]
Further, according to the present invention, the support frame which is wrapped around the back surface portion of the return belt on the conveyor frame supported on both widthwise side portions of the belt conveyor, and the back surface portion of the return belt is fixed. And a pair of support blocks attached to lower portions on both sides of the support frame to support the respective alignment rollers, wherein a width between outer sides of the support blocks is the conveyor frame. In the centering device of the belt conveyor formed so as to be larger than the inner width of the support frame, the support block supporting the centering roller can be moved close to and away from the lower part of the support frame along the longitudinal direction thereof. Attachment, mounting flanges for attaching the support frame to the conveyor frame are provided at both ends of the support frame. Moving each of the support blocks closer to the inside of the support frame such that the width dimension between the outer sides thereof is smaller than the inner width dimension between the conveyor frames, and moving the support frame from above from between the conveyor frames. After dropping and mounting the mounting flanges at both ends on the conveyor frame, the support block is moved away from both sides of the support frame .
[0012]
[Action]
According to the first aspect of the present invention, since the centering roller is detachable from the support frame, the centering roller is once removed at the time of installation, and the support frame is fixed alone to the conveyor frame before the centering roller is attached. Install it. According to this, since the centering roller is removed, the weight is reduced, the holding and mounting of the support frame are facilitated, and the work can be facilitated.
[0013]
According to the second aspect of the present invention, since the alignment rollers are movable close to and away from each other, the alignment rollers are brought close to each other at the time of installation, and the support frames are fixed to the conveyor frame and then separated from each other, so that the alignment rollers are at predetermined positions. Make it fixed. According to this, since the centering rollers are brought close to each other, interference with the conveyor frame can be avoided, and the support frame can be attached to the conveyor frame without making the support frame inclined. Therefore, the work of removing the carrier roller can be omitted, and the work can be simplified.
[0014]
【Example】
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[0015]
1 to 3 show a centering device according to the present invention. FIG. 1 is a front view, FIG. 2 is a plan view, and FIG. 3 is a side view.
[0016]
As shown in the figure, a pair of conveyor frames 1 having a U-shaped cross section are supported on both sides in the width direction of the belt conveyor and extend in the longitudinal direction. The upper side is the carrier side, and the lower side is the return side. Each of the belts (not shown) is provided so as to run freely. A centering device 2 is provided at a predetermined position on the conveyor frame 1. The centering device 2 is provided on a support frame 5 that is wrapped around the conveyor frame 1 across the back surface of the return belt, and on both sides of the support frame 5. A pair of centering rollers 4 which are detachably attached to each other and support the back surface of the return belt at a predetermined trough angle θ.
[0017]
The support frame 5 is formed in a rectangular shape that is long in the width direction, extends in the width direction, and is paired with a pair of rail members 8 made of angle materials that are spaced apart from each other in parallel at a predetermined interval in the longitudinal direction. The rail member 8 is integrally formed by welding or the like with a mounting flange 9 having an L-shaped cross section for connecting the ends of the rail member 8 to each other. The horizontal portion 9a of the mounting flange 9 is provided with a pair of long holes 10 which are spaced apart in the longitudinal direction, and the conveyor frame 1 is provided with threaded holes 1a corresponding to the positions of the long holes 10. Therefore, the fixing of the support frame 5 is performed by placing the horizontal portion 9a of the mounting flange 9 on the conveyor frame 1 and inserting a bolt (not shown) into the elongated hole 10 and the threaded hole 1a from above. At the same time, the elongate hole 10 allows a slight adjustment of the position in the longitudinal direction and a positional deviation of the threaded hole 1a drilled prior to installation.
[0018]
In particular, the horizontal portion 9a of the mounting flange 9 is made relatively long in the width direction (about 100 mm), so that it is possible to cope with a case where the width dimensions of the conveyor frame 1 are different.
[0019]
The centering roller 4 has a support block 7 which is detachably attached to the support frame 5 so as to form the support portion 6. The support block 7 has a rectangular upper end plate 11 whose upper end is formed and whose front and rear portions in the longitudinal direction are placed on and engaged with the upper surface portion 8a of the rail member 8, and an obliquely lower portion between the upper end plate 11 and the rail member 8. And a pair of extension plates 12 arranged before and after the centering roller 4, and connecting the extension plates 12 at the upper and lower portions and fixing the shafts at both ends of the centering roller 4. It is integrally formed with the plate 13 by welding or the like. A pair of elongated holes 14 spaced apart in the width direction are provided at the front and rear portions of the upper end plate 11, and threaded holes 15 corresponding to the elongated holes 14 are provided at both ends of the upper surface 8 a of the rail member 8. The bolts (not shown) are inserted into the holes 14 and 15 from above, so that the support block 7 is detachably fixed, and the fixing position can be adjusted in the width direction by the elongated holes 14. I have. If the fixing is not performed, the support block 7 is slidable along the rail member 8 in the longitudinal direction, that is, in the width direction, so that the centering rollers 4 can move close to and away from each other. More specifically, the threaded hole 15 includes a hole provided in the upper surface portion 8a of the rail member 8, and a nut (not shown) welded to the back surface side of the hole.
[0020]
FIG. 4 shows a support structure of the centering roller 4, and the centering roller 4 includes a fixed shaft 16 and a cylindrical body 17 rotatably mounted on the fixed shaft. Both ends of the fixed shaft 16 protrude from the cylindrical body 17, and a cutout 18 shown in a cross section in the drawing is provided at substantially the center of the protrusion. The notch 18 is inserted from below into a groove 19 formed in the fixing plate 13, and a shaft portion located on the tip side from the notch 18 is inserted into a hole 21 of a mounting plate 20 shown in FIG. 5. Therefore, by fixing the mounting plate 20 to the fixing plate 13 with the screws 22 using the holes 22 and the threaded holes 23, the fixing shaft 16 is fixed to the fixing plate 13 and the centering roller 4 is supported.
[0021]
Next, the operation of the present embodiment will be described.
[0022]
At the time of installation of the centering device 2, first, the support block 7 is placed in advance substantially in the center of the support frame 5 (the state of the phantom line in FIGS. 1 and 2). At this time, the alignment roller 4 may be removed. Next, the support frame 5 is inserted from just beside between the carrier belt and the frame 1 , dropped into the space between the conveyor frames 1, and the mounting flange 9 is placed on the conveyor frame 1. In this case, in particular, the support blocks 7 on both sides are shifted toward each other so that they do not interfere with the conveyor frame 1 and are located between the frames 1. Further, the support frame 5 can be attached by dropping the support frame 5 from above in a state parallel to the width direction and mounting the mounting flange 9 on the conveyor frame 1. There is no dropping from one space, so the work of removing the carrier roller can be omitted. Further, after the fixing flange 9 is fixed to the conveyor frame 1 to fix the support frame 5, each support block 7 is slid or moved to the end of the support frame 5, and the upper end plate 11 is moved to the rail member 8. If it is fixed to, installation is completed.
[0023]
As described above, the operation of holding the apparatus 2 or supporting it by hand is only performed when the apparatus 2 is mounted on the conveyor frame 1. Therefore, even when the apparatus 2 is relatively large and heavy, the installation becomes extremely easy, and the work for removing the carrier roller can be omitted, so that the working time can be greatly reduced. If the centering roller 4 is detached and then installed later, the weight of the device 2 is reduced, and the installation is further facilitated.
[0024]
As another method, only the support frame 5 may be fixed first, and the support blocks 7 may be attached one by one later. In this case, since only the support frame 5 is used, the weight is remarkably reduced, and the work of mounting this on the conveyor frame 1 becomes extremely easy. Therefore, according to this method, the installation is further facilitated.
[0025]
Also, when the bolts are fixed, the work is easy because all the bolts are inserted from above. That is, the installation of the conventional apparatus requires the bolts to be inserted from below, and when the floor approaches, the space is particularly narrow and the work is complicated. This is not the case in the present embodiment, and work can be easily performed in a large space.
[0026]
Another great advantage is that the support block 7 is provided with the elongated holes 14 so that the position can be slightly adjusted, and the contact area between the alignment roller 4 and the return belt is adjusted to adjust the alignment force. It becomes possible. That is, if the support blocks 7 are moved in the direction of pulling each other, the contact area increases, and the alignment force can be increased. Conversely, if the support blocks 7 are moved in the direction of separation, the alignment force can be reduced. it can. Therefore, by checking the meandering state of the belt after the installation operation and adjusting the position of the support block 7 appropriately, it is possible to easily obtain an optimum centering effect according to, for example, the inclined state of the conveyor, the running speed of the belt, and the like. It becomes possible.
[0027]
As a modification of the above embodiment, for example, the long holes 14 of the support block 7 may be a plurality of holes provided at predetermined intervals.
[0028]
【The invention's effect】
The present invention exhibits the following excellent effects.
[0029]
(1) Installation can be facilitated and work time can be reduced.
[0030]
(2) An optimum alignment effect can be easily obtained.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of a centering device according to the present invention.
FIG. 2 is a plan view showing one embodiment of a centering device according to the present invention.
FIG. 3 is a side view showing one embodiment of a centering device according to the present invention.
FIG. 4 is a view showing the support structure of the centering roller, as viewed in the direction of arrow A in FIG.
FIG. 5 is a front view showing a mounting plate.
FIG. 6 is a front view showing a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Conveyor frame 2 Alignment device 4 Alignment roller 5 Support frame 7 Support block 8 Rail member θ Trough angle

Claims (4)

A support frame that is laid across the back surface of the return belt on a conveyor frame that is supported on both sides in the width direction of the belt conveyor, and a pair of centering rollers that support the back surface of the return belt at a predetermined trough angle; A pair of support blocks attached to the lower portions on both sides of the support frame to support the respective centering rollers, wherein the width between the outer sides of the support blocks is formed to be larger than the inner width between the conveyor frames. In the centering device of the belt conveyor
At both ends of the support frame, mounting flanges for mounting the support frame to the conveyor frame are provided, and the support frame is dropped from above between the conveyor frames, and the mounting flanges at both ends are placed on the conveyor frame. And a support block supporting the alignment roller is detachably attached to lower portions on both sides of the support frame . A support frame that is laid across the back surface of the return belt on a conveyor frame that is supported on both sides in the width direction of the belt conveyor, and a pair of centering rollers that support the back surface of the return belt at a predetermined trough angle; A pair of support blocks attached to the lower portions on both sides of the support frame to support the respective centering rollers, wherein the width between the outer sides of the support blocks is formed to be larger than the inner width between the conveyor frames. In the centering device of the belt conveyor
The support block supporting the alignment roller is attached to a lower portion of the support frame so as to be movable close to and away from the support frame along a longitudinal direction thereof, and mounting flanges for attaching the support frame to the conveyor frame are provided at both ends of the support frame. The support frame is moved closer to the inside of the support frame such that the width between the support blocks is smaller than the inner width between the conveyor frames. And the mounting flanges at both ends of the supporting block are mounted on the conveyor frame and mounted, and then the support block is moved away from both sides of the support frame . 3. The centering device for a belt conveyor according to claim 1, wherein the support frame includes a rail member for engaging the centering rollers and moving the centering rollers toward and away from each other. The support frame is constituted by rail members which are mounted on and engaged with the conveyor frame at both ends from above and are provided in parallel at a predetermined interval, and the centering roller is provided with the rail The upper member is inserted between the members from above and is placed on and engaged with the rail member. The upper member is engaged with the rail member so as to be movable close to and away from each other along the longitudinal direction thereof, and the alignment roller is attached to the return belt. 3. The centering device for a belt conveyor according to claim 1, further comprising a support block rotatably supporting a predetermined trough angle.

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