JP4477716B2 - Twist correction device in pipe conveyor and pipe conveyor provided with the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a twist correcting device for correcting a twist of a pipe belt that is partly rolled into a pipe and is wrapped in a pipe shape and envelops an object to be transported inside the belt, and this twist correcting device. And a pipe conveyor provided.
[0002]
[Prior art]
A pipe conveyor is known in which a part of a circulating endless belt-like conveyor belt is rolled into a pipe shape, and powder particles are encased therein and continuously conveyed.
This pipe conveyor may be provided with a twist correction device that corrects the twist when a predetermined portion of the conveying belt rolled into a pipe is twisted. As a conventional example of the twist correction device, for example, There are three things.
[0003]
Japanese Patent Publication No. 1-446404 discloses a torsion straightening device in which a spacer is sandwiched between a bearing bracket that supports a correction roller and a support bracket that supports the bearing bracket, and the rotation shaft of the correction roller is conveyed by a conveyor belt. It is intended to correct the torsion of the conveyor belt by the rotational force of the straightening roller, but it is necessary to attach a spacer to each straightening roller. Needed.
[0004]
This problem has been solved by the twist correction apparatus described in Japanese Patent Laid-Open Nos. 5-8822 and 10-329914.
[0005]
In the apparatus disclosed in Japanese Patent Laid-Open No. 5-8822, a rectangular frame-like support frame is disposed around a portion where the rolled conveyor belt is likely to be twisted so as to surround the portion, and is projected from the inner peripheral surface of the support frame. A roller support frame is rotatably attached to a rotation shaft facing the conveyance belt side, and a correction roller that contacts the conveyance belt is attached to a surface of the roller support frame facing the conveyance belt, and the roller support frame is arranged around the rotation axis. The roller support frame is rotated by the angle adjusting means for rotating the correction roller to incline the correction roller with respect to the traveling direction of the conveyor belt.
[0006]
In the apparatus described in Japanese Patent Laid-Open No. 10-329914, a pedestal is disposed below a circularly rounded conveyor belt, a load holding roller for supporting the lower surface of the conveyor belt is attached to the pedestal, and a side portion of the pedestal A plurality of struts located on the side of the conveyor belt are erected, and a rotation shaft facing the conveyor belt is projected from each strut, and an arm that rotatably supports the correction roller is rotated on the rotation shaft. By freely attaching, connecting each arm with a flexible rod, rotating the handle provided at the tip of the shaft linked to the flexible rod, rotating each correction roller around each rotation axis, The correction roller is inclined with respect to the traveling direction of the conveyor belt.
[0007]
[Problems to be solved by the invention]
However, since the twist correction apparatus described in Japanese Patent Laid-Open No. 5-8822 rotates the roller support frame, the rotation angle of each roller varies depending on the mounting position of each roller, and a sufficient correction effect is obtained. In addition, there is a problem that a large rotational driving force is required because the roller support frame is rotated.
[0008]
Further, in the twist correction apparatus described in Japanese Patent Laid-Open No. 10-329914, the circular holding roller is only disposed on the side surface of the portion of the conveyance belt that is rounded into a pipe shape, and the load support roller and the correction device are used. Since the roller is disposed at a position separated in the longitudinal direction of the belt, there is a problem that the correction effect by the correction roller cannot be sufficiently obtained.
[0009]
The present invention relates to a twist straightening device in a pipe conveyor that changes the direction of all the rollers arranged on the same circumference of a belt-like transport belt to obtain a sufficient twist prevention / correction effect, and a pipe conveyor equipped with this device. And is intended to provide.
[0010]
[Means for Solving the Problems]
According to the present invention, the above problem is solved as follows.
(1) A twist straightening device that corrects torsion of the transport belt in a pipe conveyor in which a part of an endless belt-shaped transport belt that circulates is rounded into a pipe shape, and a transported object is wrapped inside and transported. A fixed frame formed in a regular polygonal ring shape through which the rounded portion of the conveyor belt passes, and press-contact with the outer peripheral surface of the rounded portion in a direction intersecting the traveling direction of the pipe-shaped belt. A plurality of roller support frames having a roller and arranged in a plurality of positions on the inner periphery of the fixed frame so as to be changeable; and a plurality of direction changes provided on the fixed frame and changing the direction of the roller support frame. means and, said plurality of reorientation means, and a linking mechanism for linking together the orientation changing means, said pipe-shaped bell on the outer periphery of the sides of the fixed frame A bolt disposed in parallel with the traveling direction of the motor, a nut screwed into the bolt, a rotating piece that intersects with the bolt and is rotatably provided on a side of the fixed frame and interlocked with the nut. The rotating piece is connected to the roller support frame, and the linkage means is a sprocket provided on each of the bolts of the plurality of direction changing means, and an endless chain spanned between the plurality of sprockets. and shall to have a door.
[0011]
( 2 ) In the above item ( 1) , the drive source is connected to one bolt among the bolts of the plurality of direction changing means.
[0012]
( 3 ) In the above item (1) or (2) , when the rounded portion of the conveyor belt is twisted by a predetermined amount, a twist detecting means for detecting an overlapping portion of the rounded portion is provided.
[0013]
( 4 ) In the above item (3) , when the detecting means detects the twist, the drive source is operated so that the roller is inclined through the roller support frame in a direction to correct the twist.
[0014]
( 5 ) It is a pipe conveyor, and is provided with the twist correcting device according to any one of the above items (1) to ( 4 ).
[0015]
( 6 ) In the above item (5) , a plurality of twist correcting devices are provided along the traveling direction of the conveyor belt, and the direction changing means of the twist correcting device are connected by connecting means. .
[0016]
( 7 ) In the above item (5) or (6) , the torsion straightening device includes a pipe-shaped belt in the vicinity of the inlet end for receiving the object to be conveyed, a vicinity of the outlet end for discharging the object to be conveyed, and a pipe-shaped belt. Is arranged at least at one location with the curved portion.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
1 to 3 show a pipe conveyor (12) equipped with a pipe belt twist correction device of the present invention.
The endless conveying belt (1) having flexibility has an elastic tendency to be rounded around a longitudinal axis to form a pipe shape, and as shown in FIG. 1 and the driven drum (3) on the rear side in a state of being flattened and tilted so that the driving drum (2) is disposed higher than the driven drum (3) as a whole. It is supposed to run around.
[0018]
(4) (4 ') is a support frame which has a linkage (5) and is arranged in the front-rear direction at a substantially constant interval in the traveling direction of the transport belt (1) and faces in a direction perpendicular to the transport belt (1). As shown in FIG. 2, the upper chamber (4a) is divided into two upper and lower chambers (4a) and (4b). In the upper chamber (4a), the forward belt (1a) which is the forward portion of the conveyor belt (1) In (4b), the return belt (1b), which is the return path portion of the conveyor belt (1), passes.
[0019]
In each of the upper and lower chambers (4a) and (4b) of each support frame (4) excluding the support frames (4 ') at the front and rear ends, a plurality of shape-retaining rollers (6) are substantially drawn in a circle. These are pivoted on the same circumference at almost regular intervals.
[0020]
As shown in FIG. 3, the forward belt (1 a) that is flattened and rotates from the lower surface of the driven drum (3) to the upper surface of the forward belt (1 a) 7) It is gradually rounded into a bowl shape by being guided by (8) and by its own elastic tendency.
[0021]
Before the forward belt (1a) is sufficiently rounded, a powder or granular material (10) is transferred onto the forward belt (1a) from the hopper (9) provided above the driven drum (3). Dropped.
[0022]
Next, the outward belt (1a) enters the upper chamber (4a) of the support frame (4), is guided by the shape-retaining roller (6), is rounded into a pipe shape, and is also disposed at both ends of the outward belt (1a). The parts are polymerized in the upper part, and the object (10) to be conveyed is wrapped therein.
[0023]
The forward belt (1a) wrapped around the object (10) is supported by the shape-retaining roller (6) and travels while maintaining the pipe shape.
[0024]
In the vicinity of the front drive drum (2), the forward belt (1a) that has escaped from the foremost support frame (4) is substantially symmetrical with the envelopment part of the conveyed object (10) shown in FIG. The material to be conveyed (10) is unfolded while passing through the belt unfolding device (not shown), and is put into a receiving box (11) provided in front of and below the drive drum (2).
[0025]
The return belt (1b) that has passed through the drive drum (2) is rolled into a pipe shape as described above, passes through the lower chamber (4a) of each support frame (4), returns to the driven drum (3), and circulates. To do.
[0026]
In this way, the conveyor device (12) may be arranged as a long one extending to several hundreds of meters, but if the distance between the drums (2) and (3) is too long, it will be a pipe-like shape. The front and rear ends of the conveyor belt (1) may be twisted about its axis.
In particular, if the forward belt (1a) is twisted, the transported object (10) will spill out, and an excessive force will act on the transport belt (1) or the drive motor, thereby significantly accelerating its wear. Become.
[0027]
For this reason, in the upper chamber (4a ′) of the support frame (4 ′) at both the front and rear ends, a twist correction device (14) that can correct the twist of the transport belt (1) is provided.
[0028]
As shown in FIGS. 4 to 7, a fixed frame (13) having a regular hexagonal shape in front view is fixed to an inner peripheral surface of the upper chamber (4a ′) via a mounting member (not shown). Bearings (17) are provided inside the projecting pieces (16) and (16) standing on both front and rear edges of each side of (13), and penetrate the front and rear projecting pieces (16) and (16). The feed screw (15) is supported by the bearing (17) so as to be rotatable and immovable in the thrust direction.
[0029]
A sprocket (18) is fixed to the front end portion (end portion on the drive drum (2) side) of the feed screw (15). A nut (19) in which the front and rear end faces (19a) (19a) are formed in an arc shape is screwed into the middle part of the feed screw (15), and the outer periphery of each side of the fixed frame (13) The through holes (21a) of a pair of connecting projections (21) and (21) projecting from one end of the rotating piece (20) placed on the surface are the both end surfaces (19a) ( It is loosely fitted to the feed screw (15) in contact with 19a).
[0030]
As shown in FIG. 7, the square hole (22) formed in the intermediate part of the rotating piece (20) has a circular through hole (23) drilled in the central part of each side of the fixed frame (13). The nut (30) screwed into the outer end of the bolt (24) passing through the square hole (22) and the through hole (23) is tightened to the outer surface of the rotating piece (20). ing.
[0031]
A pair of square nuts (24b) and (24c) are screwed onto the bolt (24) so as to hold a circular round shaft portion (24a) loosely fitted in an intermediate portion of the bolt (24). The nut (24b) is non-rotatably fitted in the square hole (22) of the rotating piece (20), and the round shaft portion (24a) is rotatably fitted in the through hole (23). .
[0032]
A square hole (27) drilled in the roller support frame (26) that supports the straightening roller (6 ') is non-rotatably fitted to the nut (24c), and the inner end of the bolt (24) The nut (31) is screwed, and the nut (31) is pressed against the peripheral edge of the square hole (27), so that the roller support frame (26) is attached to the inner end of the bolt (24). It is fixed.
[0033]
As described above, when the round shaft portion (24a) is rotatably fitted in the through hole (23), the rotating piece (20) and the roller support frame (26) rotate together. In addition, with the fixed frame (13), feed screw (15), nut (19), rotating piece (20), bolt (24), roller support frame (26), straightening roller (6 '), etc. A twist correction device (14) is configured.
[0034]
Further, the feed screw (15), the sprocket (18), the nut (19), the rotating piece (20), the bolt (24) and the like constitute a direction changing means (37).
[0035]
A chain (32) is stretched over all the sprockets (18) provided on the common fixed frame (13). The sprocket (18) and the chain (32) constitute linkage means.
[0036]
Next, the operation will be described.
When twisting occurs in the rounded portion of the outward belt (1a), the worker can connect the square shaft portion (33) to one end of the feed screw (15) corresponding to each correction roller (6 ′) shown in FIG. If a removable handle (not shown) is attached to the square shaft part (33) of the lead screw (15A) on which the lead screw (15A) is formed, and the lead screw (15A) is manually rotated, then only the lead screw (15A) First, all the other feed screws (15) are also rotated by the chain (32), and all the nuts (19) are moved in the same direction. As the nut (19) moves, the rotating piece (20) and the roller support frame (26) are integrally rotated in the direction indicated by the arrow A in FIG. As a result, all the correction rollers (6 ′) are inclined in the same direction.
[0037]
If the straightening roller (6 ') is tilted in the direction opposite to the direction in which the rounded part of the outward belt (1a) twists, the twist in the direction opposite to the direction in which the rounded part tries to twist A force can be applied to correct the twist of the rounded portion.
[0038]
The feed screw (15A) may be rotated by remotely operating a motor (not shown).
Further, as shown in FIG. 8, the twist of the rounded portion of the outward belt (1a) is caused by a pair of swing members (34) rotatably disposed in the vicinity of the overlapping portion of the outward belt (1a). The detection piece (34a) (34a) is rotated by the twist of the forward belt (1a), and the detection piece (34a) is in contact with the sensor (35) (35) to detect the twist and the twist direction. Correction may be made automatically by automatically controlling a motor (not shown) connected to the feed screw (15A).
[0039]
Further, as shown in FIG. 9, the feed screws (15A) of the different fixed frames (13) are connected to each other by a connecting rod (36) which is a connecting means, and a plurality of twist correcting devices (14) are operated simultaneously. Also good.
[0040]
In the twist correction device (14), the forward belt (1a) is curved in addition to the vicinity of the entrance end receiving the conveyed object of the forward belt (1a) and the outlet end discharging the conveyed object, which is severely worn. In such a case, the wear of the forward belt (1a) can be more effectively prevented by disposing it on a curved portion (not shown).
A twist correcting device (14) may be provided on the return belt (1b) side.
[0041]
【The invention's effect】
According to the first aspect of the present invention, it is possible to change the orientation of all of the plurality of rollers disposed on the same circumference of the portion of the belt-like conveyance belt that is rounded into a pipe shape. Therefore, it is possible to reliably correct the twist of the portion of the belt-like transport belt that is rounded into a pipe shape.
[0042]
In addition, when the user activates one direction changing means, the direction of the other direction changing means can be changed by the linkage means, so that all the rollers are inclined in one operation, and the directions of the rollers are the same. It is possible to align the directions, and it is possible to quickly correct the twist of the portion of the belt-like transport belt rounded into a pipe shape with a simple operation.
[0043]
In addition, if bolts and nuts are used for the direction changing means, no slip will occur in transmitting the operating force in the direction changing means, and the direction of all the rollers will be changed to the same direction without fail. It is possible to reliably correct the twist of the rounded portion of the conveyor belt.
[0044]
Furthermore, when the sprocket provided on the bolt of the direction changing means and the chain spanned over the sprocket are used as the linkage means, the transmission of the operating force between the direction changing means is reliably transmitted, and all the rollers By quickly aligning the directions in the same direction, the twist of the rounded portion of the belt-like transport belt can be reliably corrected.
[0045]
When the drive source is provided on the bolt as in the invention described in claim 2, it is not necessary for the user to manually operate the direction changing means, and the operation becomes easy. In addition, remote operation becomes possible.
[0046]
According to a third aspect of the present invention, when a rounded portion of the conveyance belt is twisted by a predetermined amount, the twist of the conveyance belt can be automatically detected if the twist detection means for detecting the twist is provided. This makes it possible to easily carry out maintenance management of the conveyor belt.
[0047]
If the drive source is activated by the twist detection means for detecting the twist of the rounded portion and the direction of the roller can be changed as in the invention described in claim 4 , the twist is automatically corrected. be able to.
[0048]
According to the fifth aspect of the present invention, when the twisted portion of the belt-like belt is twisted, it can be corrected by the twist correcting device, so that the object to be transported can be smoothly transported.
[0049]
If a plurality of twist correction devices interlocking with each other are provided along the traveling direction of the transport belt as in the invention described in claim 6 , the twist of the belt-shaped belt is reliably corrected and the object to be transported is transported smoothly. be able to.
[0050]
As described in the seventh aspect of the present invention, when the twist correcting device is provided near the entrance for receiving the object to be transported, near the outlet for discharging the object to be transported, or at the curved portion, the twist is surely generated. It is possible to prevent the belt belt from being damaged.
[Brief description of the drawings]
FIG. 1 is a front view of a pipe conveyor provided with a twist correction device according to an embodiment of the present invention.
FIG. 2 is a view taken in the direction of arrows II-II in FIG.
FIG. 3 is an enlarged view taken along the line III-III in FIG. 1;
4 is an enlarged view taken along arrow IV-IV in FIG. 1;
FIG. 5 is a side view of FIG. 4 with some members omitted and a part viewed from the right side.
6 is a plan view of FIG. 5 in which some rollers are omitted.
FIG. 7 is a perspective view of a torsional straightening device partially disassembled.
FIG. 8 is a longitudinal front view of a portion where a sensor for detecting a step portion of an overlapping portion of the rounded portion of the conveyance belt is provided.
FIG. 9 is a side view of a main part showing an example in which feed screws of different fixed frames are connected to each other by a connecting rod and each twist correction device is synchronized.
[Explanation of symbols]
(1) Conveyor belt
(1a) Outward belt
(1b) Return belt
(2) Driving drum
(3) Followed drum
(4) (4 ') Support frame
(4a) Upper room
(4b) Lower chamber
(5) Continuous
(6) Shape retaining roller
(6 ') Straightening roller (roller)
(7) Support roller
(8) Support roller
(9) Hopper
(10) Conveyed object
(11) Receipt box
(12) Pipe conveyor
(13) Fixed frame
(14) Twist straightening device
(15) Bolt
(15A) Bolt
(16) Projection
(17) Bearing
(18) Sprocket (linkage means)
(19) Nut
(19a) Both end faces
(20) Rotating piece
(21) Connecting protrusion
(22) Square hole
(23) Through hole
(24) Bolt
(24a) Round shaft
(24b) Nut
(24c) Nut
(25) Rotating shaft
(26) Roller support frame
(27) Square hole
(30) Nut
(31) Nut
(32) Chain (linkage means)
(33) Square shaft
(34) Swing member
(34a) Detection piece
(35) Sensor (torsion detection means)
(36) Linkage
(37) Direction change means

Claims (7)

In a pipe conveyor in which a part of an endless belt-shaped transport belt that circulates is rolled into a pipe shape and wraps a material to be transported in the pipe conveyor, the twist correction device corrects the twist of the transport belt,
A fixed frame formed in a regular polygonal ring shape through which the rounded portion of the conveyor belt passes, and press-contact with the outer peripheral surface of the rounded portion in a direction intersecting the traveling direction of the pipe-shaped belt. A plurality of roller support frames having a roller and arranged in a plurality of positions on the inner periphery of the fixed frame so as to be changeable; and a plurality of direction changes provided on the fixed frame and changing the direction of the roller support frame. Means, and linkage means for interlocking the plurality of direction changing means with each other ,
The direction changing means includes a bolt disposed on the outer periphery of the side of the fixed frame in parallel with the traveling direction of the pipe-shaped belt, a nut screwed into the bolt, A pivot piece provided rotatably on a side and interlocking with the nut, and the pivot piece is coupled to the roller support frame;
It said linkage means, torsion in the pipe conveyor, characterized that you have a sprocket disposed on each bolt of said plurality of reorientation means, and an endless chain that is wound around a plurality of sprockets straightening apparatus. More of the bolts of the reorientation means, the correction device twist in one of the bolts to the mounting Claim 1 Symbol driving source is connected pipe conveyor. When rounded portion of the conveyor belt is twisted a predetermined amount, the correction device twist in claim 1 or 2 SL placing the pipe conveyor and a twist detecting means for detecting an overlap portion of the rounded portion. 4. The twist correction in a pipe conveyor according to claim 3 , wherein when detecting the twist, the drive source is actuated to incline the roller through a roller support frame in a direction to correct the twist. apparatus. A pipe conveyor comprising the twist straightening device according to any one of claims 1 to 4 . The pipe conveyor according to claim 5 , wherein a plurality of twist correcting devices are arranged along a traveling direction of the conveyor belt, and the direction changing means of the twist correcting device are connected by a connecting means. The twist correction device is disposed in at least one of the vicinity of the inlet end for receiving the conveyed object of the pipe-shaped belt, the vicinity of the outlet end for discharging the conveyed object, and the curved portion of the pipe-shaped belt. The pipe conveyor according to claim 5 or 6 .

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