JPS6088325A - Continuous constant volume feeder - Google Patents

Abstract

PURPOSE:To elevate the weighing accuracy by arranging a fulcrum and a load detecting member on the side of a conveying machine for weighing at a space at right angles to a fixed direction. CONSTITUTION:As a motor 12 is driven, a shaft 20 is rotated at a constant speed through pulleys 15 and 17 and a timing belt 16 and turns a drive roller 7 to run a belt 6 in the direction of the arrow (b). A vibration feeder 2 vibrates at the amplitude according to the set value in a control circuit and delivers material from a hopper 3 to be fed to a belt conveyor 4. In the normal condition, the layer thickness of the material on the belt conveyor 4 is so constant and a load working on a load cell 36 also so constant as to discharge material at a desired amount from the belt conveyor 4. But to accommodate any change in the characteristic of water or the like in the material and any bridge within the hopper 3, the feed of the material from a trough 62 changes though the amplitude of the trough 62 is constant and the load working on the load cell 36 varies to allow the compensation for any variation in the material by the amplitude of the trough. Thus, a stable control can be done at a high accuracy.

Description

[Detailed description of the invention] The present invention relates to a continuous metering device.

This type of device includes, for example, a weighing belt conveyor that conveys material at a constant speed in a fixed direction; a movable frame that supports the weighing belt conveyor; a fulcrum that supports the movable frame around which it can be rotated; a load cell that receives the rotational force of the movable frame; a vibration feeder that supplies material to the weighing belt conveyor and can control the feeding speed;
The supply-4 of the vibration feeder is controlled based on the load detection signal from the load cell to supply a fixed amount of material from the weighing belt conveyor.

However, in the above device, the fulcrum and the load cell are arranged below the heald conveyor at a predetermined interval in the fixed direction. Therefore, there is no problem if the belt of the belt conveyor is uniformly formed, but if the weight per unit area varies, even when the material is not being supplied from the vibratory feeder, it will be transferred to the load cell as the belt runs. The load fluctuates. Further, when material is being fed from the vibrating soider, the moment exerted by a certain material portion on the fulcrum changes as the material advances on the belt. Therefore, there is no problem if the supply amount from the vibrating feeder is constant, but for example, if the amount of material supplied to the vibrating feeder is constant, there is no problem. If the discharge state of the hopper which discharges IL-1 is fluctuated and the supply amount fluctuates, the amplitude of the vibrator must be controlled to compensate for this fluctuation. At this time, the response of the swing 11 is delayed due to the above-mentioned fluctuation in the moment due to the progress of the fluctuation, and the measurement accuracy is also deteriorated. In addition, since the point at which particles are discharged from the tran of the swing J11υ feeder onto the belt changes depending on the discharge speed, the distance to the fulcrum varies, which adversely affects weighing accuracy.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a continuous quantitative supply device that can improve the nitrility compared to the conventional method and stabilize the control. This purpose of the present invention is to provide a weighing conveyor for transporting the scales at a constant speed in a fixed direction; a 100F moving frame supporting the weighing conveyor; supporting the movable frame rotatably around it; a load detection member that receives the rotational force of the movable frame; a material feeder that supplies material to the weighing conveyance machine and can control the supply amount;
In the continuous quantitative feeding device, the supply amount of the paulownia material feeding machine is controlled and the I material is fed in fixed quantities from the measuring conveyor, wherein the supporting point and the load detection signal are directed in a direction perpendicular to the certain direction. This is achieved by a continuous metering supply device that is disposed on the side of the weighing conveyor after a predetermined interval h1).

Hereinafter, embodiments of the present invention will be explained with reference to the drawings.

B. The continuous quantitative feeding device of the embodiment mainly consists of the metering and conveying section (
1j, Vibration feeder (2) for supplying spores to this
and a hopper (3) for storing materials. The tear transfer section (1) consists of a transfer section (4) and a weighing section (5). In this embodiment, the conveying section (4) is a belt conveyor, and the belt (6) is connected to a driving roller (7) and a driven roller (
8). As shown in FIG. 1, a tension roller (9) is disposed between these rollers (7) and (3) in contact with the lower running portion of the belt (6).

The entire δ1 transport unit (IJ is installed on the entire base QO, and below the belt conveyor (4), a cover Qυ is attached to the base α as shown in FIG. 3. An electric motor (2) for moving the drive roller (7) at a constant speed is attached to the opening of the belt conveyor (4) on the moving frame (14) via a mounting member. Boo IJ (I
Goo IJ (1) fixed to one end of Q and shaft (7)
A timing belt 0 (ν) is wound around the timing belt 71. The shaft part extends through the drive roller (7) of the belt conveyor (4) and the movable frame α4, and the timing belt 0 (ν) extends through the drive roller (7) of the belt conveyor (4) and the movable frame α4. As shown in FIG. 2, it is supported by a pair of bearings (c) α1.

As shown in Fig. 4, the shaft sand has a 7° rank (21+) in the middle part, and one end of the drive roller (7) is brought into contact with this. It has a cylindrical shape and has bearing parts (22a) (22b) at both ends.
) are formed in one piece, the shaft (7) is inserted through them, and one bearing part (22a) is in contact with the flange 121). Shaft 4 has a pair of keys (23a bar 23b)
Rotation is prevented by. The other bearing part (22
At the end of the shaft protruding from b) there is a retaining ring 7.
41 is fitted and comes into contact with the bearing part (22b), and the bolt (
251 is fixed to the shaft 4. key (23aX
23b), the rotation is stopped by the stop ring c.
When 74J is removed, the drive roller (7) can slide in the axial direction.

The shaft Cl19 through which the driven roller (8) is inserted is also supported by a pair of bearings t26 + +29 in the movable frame α, and the driven roller (8) has a smaller diameter than the driving roller (7) but has a similar structure. The field flange (2(g)) is in contact with one end of the driven roller (8).

As shown in FIG. 5, a substrate (columns are fixed on the base Q[), and a damper 61 is fixed thereon. Damper G
l) has a known configuration and its damper rod (,3
It is vertically movable and is connected to the movable frame α through a rotation transmission member (32). The blade (351U (5)' as the fulcrum of A V-shaped recess (4G (4fJ') is press-fitted. In the middle of the pair of blades C3, there is a belt in the axial direction of the shaft, as shown in Figure 5. A load cell (3'i) is fixed on the substrate t3t at a predetermined distance from the blade (351G3''J) in a direction perpendicular to the direction of transport of the conveyor (4). ) can be rotated around the circumference 9 of the blade G351C357 (differentially moved in the material conveyance direction of the belt conveyor (4)) as a fulcrum, but the rotational force is generated by the load inspection part C' of the load cell (36). The load is transmitted to D via the load transmitting member field.
6) Attachment part a; As shown in FIG. 5, it is stably fixed to Jj by a rim part (piece 1) integral with the movable frame α4.

As shown in Figures 1 to 3N, a pair of balance weight support frames (4'j15jJ) are fixed to the movable frame (+4) on both sides of the electric motor (6), and these support shafts (44)
Multiple balance weights IA'll in 6tll (4
! ft is supported. These ways) (Q (4
By changing the number of blades (9), the rotational force of the movable frame (G4) around the blade (C) G4' under no load can be adjusted to 61.1 so that it becomes zero. Therefore, when there is no load on the load cell, the load at zero is close to zero.

As shown in Fig. 1 and Fig. 3, there are a pair of stopper poles corresponding to both ends of the side wall of the movable frame α on the side opposite to the belt conveyor (4).
7) are fixed on the movable frame a<
9, and insert a pair of nuts (47a and 47b), (48a) and 48b, across the edge.
) is screwed on. This prevents an excessive load from being applied to the load cell (g).

As shown in FIG. 7, the tension roller (9) has a cylindrical shape inside, and a pair of bearing sides (2) are defined at both ends thereof. The shaft t561 passes through the tension roller (9), and its flange (611) receives the inner ring side of the bearing (60).
A tension adjustment bracket (5z) is fixed to the side wall of the moving frame α on the side of the belt conveyor (4) (see FIGS. 6 to 8), and a long hole 6 formed in the bracket 521
(The end of the shaft (G) is inserted through 5η. Shirt) 041, and screw the nut (!i51) onto the shaft (5(i)).

That is, it is fixed relative to the movable frame.

The fixing position of the shaft eiG) can be adjusted within the range of the force of the elongated hole 1b31E, and by displacing it in the direction of arrow a, that is, downward, as shown in Figure i8, the belt (4) of the belt conveyor (4) can be adjusted. 6) The tension is increased.

In Fig. 1, the vibrating element (2) consists of a trough-1 drive part +1; .Drive part-
As is well known, it consists of a plate spring, an electromagnet, etc., and the load signal of the control circuit (6 stages of drive signals are supplied. The magnitude of the drive signal is the load cell) is sent to the coil of the electromagnet.
It is increased or decreased by 6 times when compared with the set value within the range.

The embodiment of the present invention is constructed as described above, and its operation will be explained next.

When the electric motor (6) is driven, the shaft (7) is driven to rotate at a constant speed via the pulley (J) and the timing belt O19.This causes the drive roller (7) to rotate, causing the belt (6) to rotate at a constant speed. It runs in the direction indicated by the arrow in Figure 2.The vibration fan (2) vibrates with a width according to the setting value in the control circuit (6~), and cuts the paulownia wood from the hopper (3). Take it out and feed it to the belt conveyor (4).

In a steady state, the layer thickness of the paulownia wood on the belt conveyor (4) is constant, the load on the load cell (30) is also constant, and the paulownia wood is discharged from the belt conveyor (4) at a desired amount. However, if a bridging occurs in the hopper (3) 17] where the 'i'j iq (for example, accuracy distribution or moisture) of the material fluctuates, the trough (6 The amount of supply from IJ varies. Therefore, the load applied to the load cell (36) varies, and this automatically causes the IJ to be turned into the trough. However, according to the present invention, the adjustment can be made with extremely high precision and responsiveness.In other words, in the past, the load cell and the blade as a fulcrum were made of paulownia wood (D'
Since it was disposed below the belt conveyor at a predetermined distance in the IG feeding direction, even if the amount of variation in the supply from the trough remained constant, the load on the load cell further varied as the load cell was transported. Therefore, it took a considerable amount of time to reach the desired steady state, and the retention rate was not very good.However, in the present invention, the load cell (3G
) and the blade 351 C3'3f are 1 in the transport direction of the
Since it is arranged as shown in the figure on the side of the belt conveyor (4) at a predetermined distance in the (1fil) direction,
As long as the variation in the supply amount from the trough (64) is constant, the variation in the load on the load cell 43G is constant.

This is because the distance in the direction perpendicular to the conveying direction from the material fluctuation portion on the belt conveyor (4) to the blade (3s) as a fulcrum is constant. The feeder (2) is controlled so that the desired feed rate is determined from the belt conveyor (4).

Furthermore, according to the present invention, the position at which the Ih from the trough (621) falls onto the belt (6) of the belt conveyor (4) varies depending on the exit speed of the trough, but
:) The load exerted on the curve hardly changes before or after this. Even if the mass distribution of the belt (6) itself is uneven, its running hardly causes any fluctuation in the load cell (g). In the end, according to the present invention, it is possible to stably and accurately supply molluscs in a desired supply amount.

In addition, the material is supplied from the trough (6) onto the belt conveyor (4) with a width corresponding to the width of the trough, and the material hardly changes during conveyance and moves straight, but if the width changes When the belt conveyor (
4) The load on the load cell (36) will fluctuate even if you are standing on it. Therefore, if there is such a possibility, please be sure to control the inside of the room and the direction of transport! The guide for I is fixed with respect to the base (Ifδ) so that the deviation is fine.

11' Also, in this embodiment, it is conceivable that the monthly profit of 111 on the belt conveyor (4) varies in size depending on whether the supply amount from the trans (621) is large or small.
If the center line of the trough (Ii3) is aligned with the center line of the belt (6) of the belt conveyor (4), the width variation will be equally distributed on both sides of the center line, so There is almost no variation in the load on the load cell 6 due to variation. Of course, the total weight of Ih on the belt conveyor (4) is
''Then receives a proportional load M. Incidentally, the inverter (31) functions to stably control the rotation of the movable frame 04J.

This embodiment performs the following two operations and exhibits the effects, and furthermore provides the following effects.

That is, in this embodiment, since the load cell, blade, damper, etc. are arranged on the side of the belt conveyor (4), the powdery particles F falling from the belt conveyor Y (4) are
There is less risk of them intruding than before.

In other words, conventionally? ,? Since these were placed below the conveyor, there was a lot of intrusion of falling powder particles. If it penetrates into powder-like materials such as blades, load cells, dampers, etc., it will wear out, reduce performance, and reduce sheath strength. However, in this embodiment, there is almost no possibility that the insects will enter the system, so that the stability of the apparatus f', 1-'c can be guaranteed for a long period of time.

1. In particular, in this embodiment, the cover (11) is provided on the lower blade of the belt conveyor (4), so that the material from the IJ direction part of the belt (6) is transferred to the lower blade. Even if it falls, it will be prevented from flying around, load cell +3G) Ma'LIC+! Preventing unnecessary entry into IF, etc. 11-
is a real thing.

According to this embodiment, drive Ia1. It is easier to replace the J-roller (7), driven roller (8), belt (6), etc. than in the past. For example, when replacing the drive roller (7), loosen the bolt (C) in step 4171.1, remove the row linkage 4)r from the shaft (4), and then replace the drive roller (7). ) The bow and front draw can be easily taken out. In addition, if the tension is taken out (tension f l+ by 9th ring), and it is done after MeA2, it can be further taken out in jI+ year. Driven roller <8 and belt (
I also feel +1JJJ shame about the father of 6).

When installing a new drive roller (1), insert it into the shaft (E) and position it by placing it against the holder D, lower the retaining ring 1241, and lower the bolt (I!).
It's good to have a Niji okiya in J. In this way, 1 Nagiu JO-
Replacement of La, secondary #IO-La and belt (・Compared to the conventional one,
It cannot be done very easily. Conventionally, load cell blades etc. were installed on the F side of the belt conveyor, and 5
For this reason, the movable frames are also aligned below the belt conveyor toe 1, but they are arranged concentrically, and the bearings for the drive shaft and driven rollers are also provided on such movable frames to prevent goo and the like. It was very troublesome to replace the drive roller, driven roller, and belt because the related parts had to be arranged in close proximity to each other. On the other hand, according to this embodiment, as described above, the configuration is extremely simple.

Although the embodiments of the present invention are configured as described above, the present invention is of course not limited to this, and various modifications can be made based on the technical layers and ideas of the present invention.

For example, in the above embodiment, a belt conveyor is used as a weighing conveyor, and a vibration feeder is used as a material feeder.
However, the present invention is not limited to this, and any known conveyor or pellet feeder may be used.

It's ox, the blade CA'3J G3"l as a fulcrum is -/, J
Established as No. 1. However, it may be - pieces. In this case, it is arranged in alignment with the a-docel in a direction perpendicular to the first general feeding direction of the cell.

As described above, the continuous quantitative feeding device of the present invention can perform stable control with higher accuracy than conventional ones.
effects′! il - something to meet.

[Brief explanation of drawings]

Fig. 1 is a side view of a continuous quantitative feeding device according to an embodiment of the present invention, Fig. 2 is a plan view of the measuring conveyance section in Fig. 11;
The figure is a partially cutaway front view of the weighing and conveying section, Figure 4 is a cross-sectional view along line IV-IV in Figure 2, Figure 5 is a cross-sectional view along line V-■ in Figure 2, and Figure 6 is a cross-sectional view along line IV-IV in Figure 2. A partial side view of the tension roller and related parts in the figure;
FIG. 7 is a cross-sectional view along the line ■--■ in FIG. 811!6, and FIG. 8 is a perspective view of the same portion. In the figure, (1)・・・・・・・・・・・・・・・・・・・・・
・・Weighing transfer section (2)・・・・・・・・・・・・・・・
...
・・・・・・・・・・・・・・・・・・ Conveyance section (held conveyor) (5)・・・・・・・・・・・・・・・・・・
・・・・・・・・・Measuring part (6)・・・・・・・・・・
・−・・・・・・・・・・・・・ Belt (6)・
・・・・・・・・・・・・・・・・・・・・・・Electric motor (14)・・・・・・・・・・・・・・・・・・・
・・・・・・・・・Movable frame hitting・・・・・・・・・・
·············titer)·········
・・・・・・・・・・・・ Load cell Figure 6 ■ 2 7 is 1 Figure 8

Claims (1)

[Claims] A weighing conveyor that conveys paulownia wood in a fixed direction at a constant speed; a moving frame that supports the weighing conveyor; a fulcrum that rotatably supports the movable frame; rotational force of the movable frame; A load detection member that supplies material to the weighing conveyance machine and is capable of controlling the supply amount; In the continuous quantitative supply device, the paulownia wood is supplied in a fixed quantity from the weighing conveyor by controlling the
1. A continuous quantitative feeding device, characterized in that the device is disposed on the side of the weighing conveyor at a predetermined interval in the angular direction.