JP2010066013A - Weighing conveyor device including mechanism of adjusting dynamic balance of roller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a weighing conveyor device capable of precisely and efficiently adjusting dynamic balance of a roller. <P>SOLUTION: The weighing conveyor device conveys a weighing object by an endless belt stretched between a pair of rollers. The weighing conveyor device includes: a ring-shaped frictional fastening member 20 disposed at a position closing ends of the rollers 11, 12, for frictionally fixing the rollers 11, 12 with respect to axial centers 14 penetrating through the cylindrical rollers 11, 12; a plurality of bar-shaped bodies 31, 32, 33 directly or indirectly fixed to the frictional fastening member 20, disposed at point-symmetrical positions on a concentric circle of the axial center 14, and parallel to the axial center 14; and washers 38 for dynamic balance adjustment to be mounted on the bar-shaped bodies. The dynamic balance is finely adjusted by variously changing the number of the washers 38 for dynamic balance adjustment to be mounted on the bar-shaped bodies. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a weighing conveyor apparatus for weighing an object to be weighed, and more particularly, to adjust the dynamic balance of a roller that rotates a conveyor belt with high accuracy.

The weighing conveyor device is arranged, for example, in the line of the conveyor, and measures the weight of the article in the process of sending the article sent from the upstream conveyor to the downstream side.
The weighing conveyor apparatus described in the following Patent Document 1 is shown in FIG. The weighing conveyor device includes a conveyance mechanism 100 that conveys an object 600, a drive source 200 that drives the conveyance mechanism 100, a transmission mechanism 300 that transmits the driving force of the drive source 200 to the conveyance mechanism 100, and these. A supporting unit 700 for supporting and a load detecting unit 400 for detecting weight are provided.
The load detection unit 400 measures the weight of the (conveyance mechanism 100 + drive source 200 + transmission mechanism 300 + support unit 700 + object to be measured 600), and is a calculation unit (not shown) to which the measurement signal is sent (conveyance mechanism 100 + drive source). 200 + transmission mechanism 300 + support 700) is subtracted to calculate the weight of the object 600.

Since the mechanical vibration component accompanying the movement of the object to be weighed is superimposed on the weighing signal sent from the load detection unit 400, the calculation unit removes unnecessary components included in the weighing signal with a filter and then performs the weighing. Calculate the weight of the object. The calculation of the weight in the calculation unit must be accurately performed within a short time during which the object to be weighed is being transported by the transport mechanism 100.
The transport mechanism 100 includes a driving roller 103 that is rotated by the driving force of the driving source 200, a driven roller 104 that is driven, and an endless belt 105 that is stretched between the driving roller 103 and the driven roller 104.

When viewed precisely, the driving roller 103 and the driven roller 104 often have a mass deviation with respect to the rotation center and are eccentric with respect to the axis. For this reason, vibration occurs during rotation, and this vibration generates a low-frequency mechanical vibration component during measurement. The low-frequency unnecessary signal component included in the measurement signal takes time to be removed by the filter, which hinders quick and accurate measurement.
Therefore, in the weighing conveyor device, an adjustment weight (balancer) is attached to the driving roller 103 and the driven roller 104, which are rotating bodies, to improve mass deviation and to stabilize the dynamic balance.

FIG. 11 shows a conventional dynamic balance adjustment mechanism. First, the balance of the driving roller 103 is measured by a dynamic balance measuring device, and an adjustment weight 106 having a predetermined size (mass) is fixed to a side surface position of the driving roller 103 where mass deviation can be canceled.
Here, a screw hole 108 corresponding to the mounting hole 107 of the adjustment weight 106 is formed on the side surface of the drive roller 103, and the adjustment weight 106 is fixed to the side surface of the drive roller 103 using a fixing screw 109.
JP 2002-13972 A

However, it takes a lot of work and time to determine the mounting position and weight of the adjustment weight fixed to the roller. This operation is usually performed in the following procedure.
(1) First, the roller is rotated on the dynamic balance measuring device to confirm that it rotates stably.
(2) Next, the clay as an additional weight is weighed and recorded, and then attached to one end face of the roller.
(3) The roller to which clay is added is rotated on a dynamic balance measuring device to measure the dynamic balance.
(4) The processes (1) to (3) are repeated until the value of the dynamic balance becomes equal to or less than the set value.
(5) Next, the processes (1) to (4) are performed on the other end face of the roller.
(6) The additional weight is cut so as to be the same as the final mass of the clay, and is assembled to each end face of the roller.

There has been a strong demand for simplification of dynamic balance adjustment work that requires such complicated processes.
Further, it is not easy to finely adjust the dynamic balance by simply attaching the additional weight to one place on the end face of the roller.

  The present invention was devised in view of such circumstances, and an object of the present invention is to provide a weighing conveyor device that can adjust the dynamic balance of the rollers that rotate the conveyor belt with high accuracy and efficiency. Yes.

The present invention is a weighing conveyor device for conveying an object to be measured by an endless belt stretched between a pair of rollers, and the roller is fixed to a shaft center passing through a cylindrical roller by a frictional force. In order to achieve this, a ring-shaped frictional fastening member disposed at a position closing the end of the roller, and directly or indirectly fixed to the frictional fastening member, are point-symmetric with each other at a position on a concentric circle of the axis. And a plurality of rod-like bodies arranged in parallel to the axis and a washer for adjusting the dynamic balance attached to the rod-like body.
When adjusting the dynamic balance of the rollers, this weighing conveyor device checks whether or not the value of the dynamic balance falls below a set value by changing the number of dynamic balance adjusting washers attached to the rod-shaped body. This eliminates the need for clay used in the past. In addition, since there are many rod-like bodies on which the washers are mounted on the concentric circle of the axial center, the dynamic balance can be finely adjusted.

Further, in the weighing conveyor device of the present invention, the friction fastening member has a mechanical lock structure including an outer ring, an inner ring, and a bolt screwed into a fastening screw hole or a removal screw hole of the inner ring, Some of the plurality of rod-shaped bodies are directly fixed to the removal screw holes of the frictional fastening member.
The screw hole for removing the mechanical lock structure is used when the roller and the shaft center are disassembled, and is not used when the roller and the shaft center are fixed. Therefore, the rod-shaped body can be directly fixed to the frictional fastening member by using the screw hole for removal.

Further, in the weighing conveyor device according to the present invention, some of the plurality of rod-shaped bodies are fixed to an annular base, and the base is fastened with the friction using an attachment hole provided in the base. It is attached and fixed to a rod-like body fixed directly to the member.
By increasing the number of rods with such a structure, the dynamic balance can be finely adjusted.

In this case, in the weighing conveyor device of the present invention, in this case, the rod-like body directly fixed to the frictional fastening member is used for rough adjustment of dynamic balance between the base and the frictional fastening member, which also serves as a spacer of the base. The weight can be provided.
The weight for coarse adjustment of dynamic balance can be used to roughly adjust the collapse of dynamic balance caused by attaching the frictional fastening member to the roller.

Further, in the weighing conveyor device of the present invention, some of the rod-shaped bodies fixed to the base include a protruding portion that protrudes from the base toward the friction fastening member, and the dynamic balance is provided to the protruding portion. It can be configured to have a weight for coarse adjustment.
By providing the weight for rough adjustment of dynamic balance, it becomes possible to roughly adjust the collapse of dynamic balance due to the attachment of the frictional fastening member by assembling the base.

In the weighing conveyor device of the present invention, some of the rod-shaped bodies fixed to the base are fixed to the base without having a portion protruding from the base toward the friction fastening member. May be.
By doing so, the number of rod-shaped bodies increases, and fine adjustment of the dynamic balance becomes possible.
In addition, the weighing conveyor device of the present invention can be configured as a multiple weighing device by arranging a plurality of weighing conveyor devices in the traveling direction of the conveyor.

  According to the present invention, the dynamic balance of the rollers used in the weighing conveyor device can be adjusted efficiently and with high accuracy. Therefore, the noise of the weighing conveyor device is reduced, and quick and accurate weighing is possible.

An embodiment of a weighing conveyor device of the present invention will be described based on the drawings.
FIG. 1 is a perspective view (a) and a side view (b) of the weighing conveyor device, and FIG. 2 is an exploded perspective view thereof. FIG. 3 is a plan view (a) and a perspective view (b) of the transport mechanism. FIG. 4 is a perspective view of the roller integrated with the shaft center. FIG. 5 is a view showing a dynamic balance adjusting mechanism of the roller end portion, and FIG. 6 is a view showing a state in which a washer is attached to a rod-like body of the dynamic balance adjusting mechanism. FIG. 7 is an exploded perspective view of the dynamic balance adjustment mechanism. FIG. 8 is a front view (a), a side view (b), and partial cross-sectional views (c1), (c2), and (c3) of the dynamic balance adjustment mechanism. Moreover, FIG. 9 is a figure which shows the mechanical lock structure of a friction fastening member.

As shown in FIGS. 1 and 2, the weighing conveyor device includes a conveyance unit 10 that conveys an object to be measured, a motor 430 that is a driving source, a support unit 50 that supports the conveyance unit 10 and the motor 430, and a motor. A driving belt 431 that transmits the driving force of 430 to the driving roller of the conveyance unit 10, two load detection units 400 that support these, and a base 60 that supports the load detection unit 400 are provided.
The base 60 is placed on a table with an appropriate height installed in the line of the conveyor.
The load detection unit 400 has a built-in load cell, the fixed side of the load cell is fixed to the base 60, and the movable side of the load cell supports the support unit 50. Therefore, a load including the conveyance unit 10, the motor 430, the drive belt 431, the support unit 50, and the object to be weighed is applied to the movable side of the load cell, and the movable side is deformed according to this load.
Each load cell outputs a weighing signal corresponding to the deformation on the movable side, and an arithmetic unit (not shown) synthesizes the weighing signals sent from the two load cells, as well as the transport unit 10, the motor 430, the drive belt 431, and The weight of the object to be weighed is calculated by removing the load of the support part 50.

FIG. 3 shows the transport unit 10 in a state where it is detached from the support unit 50.
The transport unit 10 includes a driving roller 11 that rotates with the driving force of the motor 20, a driven roller 12 that rotates with the driving roller 11, and an endless belt 13 that is stretched over the driving roller 11 and the driven roller 12. I have.
As shown in FIG. 4, the driving roller 11 and the driven roller 12 are used while being fixed to the shaft center 14. The driving roller 11 and the driven roller 12 have the same shape, and the shaft center 14 to which they are fixed also has the same shape. Further, the driving roller 11, the driven roller 12, and the shaft center 14 are symmetrical. Therefore, the roller fixed to the shaft center 14 can be used as a driving roller or a driven roller, and can also be used by switching the left and right directions.
However, a joint for suspending the drive belt 431 is connected to the shaft center 14 to which the drive roller 11 is fixed by a connection mechanism.

As shown in FIGS. 5, 6, 7, and 8, a dynamic balance adjustment mechanism 30 is provided at each end of the rollers 11 and 12.
As shown in FIG. 7, the rollers 11 and 12 are cylindrical, and a ring-shaped frictional fastening member 20 having a mechanical lock structure is fixed between the rollers 11 and 12 and the shaft center 14 passing through the rollers. The

As illustrated in FIG. 9A, the mechanical lock structure includes three points of an outer ring 202, an inner ring 201, and a bolt 203. The inner ring 201 and the outer ring 202 are in contact with each other with a taper, and the inner ring 201 and the outer ring 202 are in contact with each other. Is provided with a slit that enables contraction and expansion.
When the bolt 203 is screwed into the fastening screw hole (the state shown in FIG. 9A), the inner ring 201 contracts and presses against the shaft center 14 by the wedge principle, and the outer ring 202 expands and presses against the rollers 11 and 12. To do. Therefore, the rollers 11 and 12 and the shaft center 14 are fixed.
On the other hand, when the bolt 203 is screwed into the screw hole for removal (the state shown in FIG. 9B), the engagement between the inner ring 201 and the outer ring 202 is loosened, and the rollers 11 and 12 can be separated from the shaft center 14. Become.

  As shown in FIG. 7, the dynamic balance adjusting mechanism 30 is screwed into a screw hole 205 for removing the frictional fastening member 20 (the bolt 203 is not screwed when the rollers 11, 12 and the shaft center 14 are fastened). The rod-shaped body 31 fixed to the base 35, the annular base 35, the rod-shaped body 32 and the rod-shaped body 33 fixed to the base 35, and the spring washer 36 for fixing the rod-shaped bodies 31, 32, 33 to the base 35. And a nut 37, a weight 38 for fine adjustment of dynamic balance mounted on the rod-shaped bodies 31, 32, 33, a spring washer 39 for fixing the weight 38 for fine adjustment of dynamic balance to the rod-shaped bodies 31, 32, 33, and And a nut 40.

The annular base 35 has a center hole through which the shaft center 14 is inserted, and has a number of small holes through which the rod-shaped bodies 31, 32, 33 are inserted around the center hole. The large number of small holes are arranged at point-symmetrical positions with respect to the center of the center hole on the concentric circle of the center hole.
The rod-like body 31 (first rod-like body) that is screwed into the removal screw hole 205 of the frictional fastening member 20 includes a spacer 311 that also serves as a weight for coarse adjustment of dynamic balance (FIG. 8 (c2)). Since one end surface of the spacer 311 abuts on the frictional fastening member 20, a situation in which the first rod-shaped body 31 is excessively screwed into the removal screw hole 205 is avoided. Therefore, there is no possibility that the coupling state between the rollers 11 and 12 and the shaft center 14 is loosened. The other end surface of the spacer 311 contacts the base 35 when the first rod-shaped body 31 is inserted into the small hole of the base 35, and maintains the distance between the base 35 and the frictional fastening member 20. In addition, this end face holds the base 35 in cooperation with a nut 37 that is screwed to the first rod-like body 31 via a spring washer 36.

There are two types of rod-shaped bodies fixed to the base 35. One rod-shaped body 33 (second rod-shaped body) has a protruding portion protruding toward the frictional fastening member 20, and this protruding portion is a dynamic balance rough adjustment. This is a weight 331 for use (FIG. 8 (c3)). Further, when the second rod 33 is inserted into the small hole of the base 35 and fixed to the base 35, the end surface of the weight 331 is shared with the nut 37 screwed onto the second rod 33 via the spring washer 36. The base 35 is clamped by working.
The other rod-shaped body 32 (third rod-shaped body) has only a flat flange 321 (FIG. 8B) on the friction fastening member 20 side without having a protruding portion. When the third rod-like body 32 is inserted into the small hole of the base 35 and fixed to the base 35, the flange 321 and a nut 37 screwed to the third rod-like body 32 via the spring washer 36 are used. The base 35 is clamped.
As shown in FIGS. 8 (a) and 8 (b), these rod-shaped bodies 31, 32, and 33 are point-symmetric so as to be parallel to the axis 14 and at equal intervals on the concentric circle of the axis 14. Be placed. In this apparatus, the total number of rod-shaped bodies in one dynamic balance adjustment mechanism 30 is 12.
As shown in FIG. 6, a necessary number of weights 38 are attached to these rod-shaped bodies 31, 32, 33, and the dynamic balance of the rollers 11, 12 is finely adjusted.

The dynamic balance adjustment work of the rollers 11 and 12 is performed in the following procedure.
(1) First, the axial center 14 is coupled to the rollers 11 and 12 using the friction fastening member 20, and this is rotated on a dynamic balance measuring device to measure the dynamic balance. Usually, when the frictional fastening member 20 is mounted, the dynamic balance of the rollers 11 and 12 is greatly lost.
(2) Next, based on the measurement result of the dynamic balance, the dynamic balance coarse adjustment weight 311 of the first rod-shaped body 31 and the dynamic balance coarse adjustment weight of the second rod-shaped body 33 so as to compensate for the collapse of the dynamic balance. 331 is selected (a first rod 31 and a second rod 33 having a plurality of types of dynamic balance coarse adjustment weights 311, 331 are prepared in advance, and the first rod 31 and the first rod 31 that are actually used are selected. 2 rods 33 are selected), or the number and fixing positions of the second rods 33 and the third rods 32 fixed to the base 35 are selected.
(3) Next, the first rod-like body 31 is fixed to the screw hole 205 for removing the frictional fastening member 20.
(4) The second rod-shaped body 33 and the third rod-shaped body 32 are fixed to the base 35, and the base 35 is fixed to the first rod-shaped body 31, so that the dynamic balance is roughly adjusted.
(5) The roller is rotated on a dynamic balance measuring device to measure the dynamic balance.
(6) The dynamic balance fine adjustment weight 38 is attached to the rod-shaped bodies 31, 32, 33.
(7) The processes (5) and (6) are repeated until the value of the dynamic balance becomes equal to or less than the set value.

Thus, in this dynamic balance adjustment work, the dynamic balance fine adjustment weight 38 is directly attached to the rod-like body without using the conventionally used clay, so that the work efficiency is greatly improved.
Further, since there are many places (12 places in this apparatus) where the weight 38 for fine adjustment of dynamic balance can be attached, fine adjustment of dynamic balance is possible, and the dynamic balance of the rollers can be maintained with high accuracy.
In addition, in the conventional method in which the weight is sharpened and finely adjusted, the fine adjustment can be made only in the direction of decreasing the adjustment weight. However, in the dynamic balance adjustment method of this embodiment, the dynamic balance fine adjustment weight attached to the rod-shaped body. The dynamic balance can be adjusted by adding or reducing 38, and the adjustment work is extremely easy.
This dynamic balance adjusting mechanism 30 can be used even if the conveyor length (distance between the driving roller 11 and the driven roller 12) and the roller width are different, and has versatility.

  The weighing conveyor device provided with the dynamic balance adjusting mechanism 30 can reduce the size of the rollers while maintaining the dynamic balance of the rollers with high accuracy. Even if the length of the conveyor or the width of the conveyor is increased, this apparatus can measure with high accuracy with little noise and can quickly and accurately measure small articles such as parts to large cargoes. Further, even when the dynamic balance of the rollers is deviated during operation, readjustment is easy and the labor of maintenance is reduced.

Here, the rollers of the conveyance unit 10 supported by the load detection unit 400 have been described. However, the dynamic balance of each roller of the multi-scale weighing apparatus in which a plurality of conveyance units 10 supported by the load detection unit 400 are arranged in the conveyor traveling direction. Can be adjusted by the same mechanism, and an upstream transport unit that feeds the objects to be weighed to the transport unit 10 and a downstream transport unit that receives and transports the objects to be weighed from the transport unit 10 are part of the weighing conveyor device. In the case of incorporation, the dynamic balance of the rollers of the upstream conveyance unit and the downstream conveyance unit can be adjusted by a similar dynamic balance adjustment mechanism.
Note that the numerical values, materials, component shapes, and the like shown here are merely examples, and the present invention is not limited thereto.

  The weighing conveyor device of the present invention can perform highly reliable weighing while keeping the dynamic balance of the rollers with high accuracy, and can be widely used in manufacturing sites and distribution sites handling various objects to be weighed.

The perspective view (a) and side view (b) of the weighing conveyor apparatus which concern on embodiment of this invention 1 is an exploded perspective view of the weighing conveyor device of FIG. The top view (a) and perspective view (b) of the conveyance mechanism in the weighing conveyor apparatus of FIG. The perspective view of the roller united with the shaft center of the weighing conveyor apparatus of FIG. The figure which shows the dynamic balance adjustment mechanism of the roller edge part of FIG. The figure which shows the state in which the washer was mounted | worn with the dynamic balance adjustment mechanism of FIG. 5 is an exploded perspective view of the dynamic balance adjustment mechanism of FIG. Front view (a), side view (b), and partial cross-sectional views (c1) (c2) (c3) of the dynamic balance adjustment mechanism of FIG. The figure which shows the mechanical lock structure of the friction fastening member A diagram showing a conventional weighing conveyor device The figure which shows the dynamic balance adjustment mechanism of the conventional roller

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Conveyance part 11 Drive roller 12 Driven roller 14 Axis center 20 Friction fastening member 30 Dynamic balance adjustment mechanism 31 1st rod-shaped body 32 3rd rod-shaped body 33 2nd rod-shaped body 35 Annular base 36 Spring washer 37 Nut 38 Dynamic balance fine adjustment Weight 39 Spring washer 40 Nut 50 Supporting part 60 Base 100 Conveying mechanism 103 Driving roller 104 Followed roller 105 Endless belt 106 Adjusting weight 107 Mounting hole 108 Screw hole 109 Fixing screw 200 Drive source 201 Inner ring 202 Outer ring 203 Bolt 205 Removal screw Hole 300 Transmission mechanism 311 Spacer also serving as dynamic balance coarse adjustment weight 321 Flat flange 331 Dynamic balance coarse adjustment weight 400 Load detection unit 430 Motor 431 Drive belt

Claims (7)

A weighing conveyor device that conveys an object to be weighed by an endless belt stretched between a pair of rollers,
A ring-shaped frictional fastening member disposed at a position for closing the end of the roller in order to fix the roller with a frictional force with respect to an axial center passing through the cylindrical roller;
A plurality of rod-like bodies that are fixed directly or indirectly to the frictional fastening member and arranged to be point-symmetric with each other at positions on the concentric circle of the axis,
A washer for adjusting the dynamic balance attached to the rod-shaped body;
A weighing conveyor device comprising:   2. The mechanical lock structure according to claim 1, wherein the friction fastening member includes an outer ring, an inner ring, and a bolt screwed into a fastening screw hole or a removal screw hole of the inner ring. A weighing conveyor apparatus, wherein some of the plurality of rod-shaped bodies are directly fixed to the screw holes for removal of the frictional fastening members.   The weighing conveyor device according to claim 2, wherein some of the plurality of rod-shaped bodies are fixed to an annular base, and the base is attached using a mounting hole provided in the base. A weighing conveyor device mounted and fixed to a rod-like body directly fixed to the frictional fastening member.   The weighing conveyor device according to claim 3, wherein a rod-like body fixed directly to the frictional fastening member is used for rough adjustment of dynamic balance between the base and the frictional fastening member, which also serves as a spacer of the base. A weighing conveyor device comprising a weight.   The weighing conveyor device according to claim 3 or 4, wherein some of the rod-shaped bodies fixed to the base include a protruding portion that protrudes from the base toward the friction fastening member, A weighing conveyor device having a weight for coarse adjustment of dynamic balance at a protruding portion.   6. The weighing conveyor apparatus according to claim 3, wherein some of the rod-shaped bodies fixed to the base do not have a portion protruding from the base toward the friction fastening member. The weighing conveyor device is fixed to the base.   A multi-scale weighing device in which a plurality of the weighing conveyor devices according to any one of claims 1 to 6 are arranged in a moving direction of the conveyor.