JPS58124920A - Continuous weighing type hopper scale - Google Patents

Abstract

PURPOSE:To execute discharge continuously, by alternately rotating two weighing hoppers by use of an intermittent motion mechanism by one driving motor, and also alternately switching a switching damper incorporated in a branch chute. CONSTITUTION:To each tip of shafts 7 of two hoppers 5, 6, gears 9, 10 are fitted, respectively, and the tooth is meshed with a driving disk 12 having a partial tooth rotated by a motor 24. According to this structure, the gear part of the driving disk 12 makes the gears 9, 10 execute one rotation alternately and intermittently, and the hoppers 5, 6 execute one rotation alternately and intermittently. On the other hand, a two way branch chute 23 containing a damper 22 which is connected to two gears 13, 14 and is switched to the left and right is installed so that its two outlets are aligned with the throw-in ports of the two hoppers 5, 6.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for weighing objects, and more particularly to a method for weighing objects using a hopper scale.

Conventionally, when weighing items using a hopper scale, the distribution before and after the weighing process was interrupted.

In order to make this nearly continuous, a method is being used in which two hopper scales and a two-way branching sheet with a built-in switching damper above are used to alternately utilize metering and discharging.

However, even with this method, it takes a certain amount of time to open and close the bottom plate of the weighing hopper, and the switching damper still requires independent air cylinders, so it takes time to synchronize the operations of the relays and solenoid valves that drive them. Even if the input of materials was continuous, the discharge could only be interrupted at a rate of about 300 times per hour.

The purpose of the present invention is to further achieve continuous material discharge, and by using an intermittent movement mechanism with a single drive motor, two objects are suspended from a fixed frame by load cells at regular intervals.
This was achieved by alternately rotating two weighing hoppers installed on separate racks via bearings, and by alternately switching the switching dampers built into the branch seats that can feed items into each weighing hopper. be done.

Explanation will be added below based on the drawings.

FIG. 1 shows an embodiment according to the invention. Two frames (■) are suspended at regular intervals on the left and right by load cells (■) from fixed frames, bearings (■) are installed at both ends of each frame, fixed bottoms are attached, and shafts (2) are installed in the center of both opposing walls. Each of the two hoppers ■■ is installed on the stand ■ via a bearing ■, and a gear ■■ is attached to the tip of the shaft of one side wall of the two hoppers ■■ via a universal joint ■. Attach the connecting shaft and connect the gear to the motor.
The teeth are meshed with a drive disc @ having one part of teeth that rotates, and one part is installed horizontally opposite to each other, so that when the motor [has] rotates, the gear part of the drive disc (■) turns the gear (■). The hopper ■■ rotates once intermittently alternately, and the hopper ■■ rotates once intermittently, and the two gears ■■ mesh with the gear portion of the drive disk @ and are installed vertically opposite each other. Attach a sprocket ■ [phase] to the shaft end of the roller chain O.
A two-way branch seat with a built-in damper @ that switches left and right via a crank ■ installed at the end of the eccentric shaft of the sprocket ■ connected by the roller chain 7 from the sprocket ■ connected to the sprocket [Co., Ltd.]. Install the @ so that its two outlets match the input ports of each of the two hoppers ■■, and connect the signal of the load cell ■ to the second
As shown in the figure, in a device connected to a weighing calculator, a tare compensator, and an integrator via an amplifier, the pin ■ of the driving disk @ is now driven by the motor ■, as shown in FIG. When starting clockwise rotation from position point ■, first, intermittent gear 0
Rotate 180 degrees, switch the damper @ to the homper ■ side, put the object into the homper ■ through the seat O, and at point ■, the weight calculator memorizes the weight of the homper ■ with the signal from the switch ■. The gear ■ rotates the hopper ■ 360 degrees to discharge the object, and when the point ◎ is reached, the tare compensator weighs the tare of the hopper with the signal from the switch ■ and subtracts it from the hopper weight to calculate the true discharge amount. After correction and integration, the damper ■ is switched to the hopper ■ side by the rotation of the gear 0, the object is thrown into the hopper ■, the hopper ■ is weighed by the signal from the switch O at point ■, and the gear [phase ] to 360 hopper■
Rotate once to discharge the object, perform tare correction with the signal from switch ■ at point ■, and totalize.

FIG. 4 is a graph showing this series of operations.

As long as the motor @ rotates, the two hoppers alternately repeat weighing and discharging, and by increasing the rotation speed of the motor, for example, when weighing powder or granules, the continuous discharge rate is as low as the rotor IJ - Pulp It can be equivalent to or higher than the degree of continuity of logistics. In addition, only an intermittent movement mechanism using a single drive motor performs the operations necessary for one series of measurements, and there is no need for complexly synchronized driving signals or multiple drive mechanisms, and the device can be constructed at low cost.

Figure 5 shows an embodiment in which a different method is adopted for the intermittent drive mechanism, in which a sprocket ■ is attached to the shaft ■ of the gear ■ [phase] which is rotated by the motor ■ via the drive disk O, and a hopper ■■
It has a structure in which a sprocket ■ is attached to the shaft and connected with a roller chain ■, and the mechanism rotates the hopper intermittently, so that it has no influence on the weighing of the load cell ■ by the connecting shaft ■ in Figure 1. Can be done.

Figure 6 shows an embodiment in which the structure of the hopper is changed, with a partition plate provided in the middle of the rectangular tube, and two opposing upper and lower sections with this as the bottom.
Compared to the embodiment shown in Fig. 1, the rotation angle of the hopper for discharging objects is halved, and the first
When the hopper rotates at the same speed as in the illustrated embodiment, the continuity of discharge is doubled.

Figure 7 shows a second embodiment in which a different method is adopted for the intermittent drive mechanism. From the example shown in Figure 1, a bevel gear 0 is installed on one shaft end of the shaft of the hopper ■■, which is set up by rotating 90 degrees on a plane, and a sprocket is attached to the shaft end of the other bevel gear that meshes with it to create a roller chain ■. With the structure connected to the sprocket (2), the rotating direction of the hopper (2) is changed by 90 degrees on a plane compared to the embodiment shown in FIG. 1, and the interval between the two hoppers (2) can be reduced.

FIG. 8 shows a third embodiment in which a different method is adopted for the intermittent drive mechanism, and an embodiment in which a different method is used to drive the switching damper.

In other words, the rotation of the motor [with] is caused by the rotation of the Geneva driver ■ via the bevel gear 0, which intermittently rotates the Geneva wheel 0, and the connected bevel gear ■ rotates the shaft ■ by 1.
The hoppers (2) and (2) are intermittently rotated through the universal joint (2) by rotating or half a rotation (when using Figure 6).

In addition, the bevel gears rotate by rotating the bevel gears ■ which have some teeth at the same plane position as the pin of the Geneva driver ■, and the two bevel gears rotate forward and backward alternately, causing the switching damper @ to rotate. Switch inverted alternately.

Further, the disk 0 having an operating pin at the same plane position as the pin of the Geneva driver @ rotates via the bevel gear Co., Ltd., and the switch ■■@■ sends out a signal as shown in FIG. 3.

[Brief explanation of the drawing]

FIG. 1 is a perspective view illustrating the invention in detail. FIG. 2 is a system diagram showing the metric calculation circuit of the present invention. FIG. 3 is a detailed explanatory diagram of the intermittent gear portion of the present invention. FIG. 4 is a graph showing the operating procedure of the present invention. FIG. 5 is a second detailed explanatory diagram in which another method is adopted for the intermittent drive mechanism of the present invention. FIG. 6 is a perspective view showing another type of structure of the hopper of the present invention. FIG. 7 is a perspective view illustrating another embodiment of the present invention. FIG. 8 shows a third embodiment in which a different method is adopted for the intermittent drive mechanism of the present invention, and is a detailed explanatory diagram in which a different method is used to drive the switching damper. The correspondence of the main reference numbers is as follows. ■ Fixed frame ■ Load cell ■ Mount ■ Shaft receiver ■ ■ Weighing hopper ■ Universal joint ■ [Phase] oO gear wheel ■ Drive disc ■ 0@[Phase] ■■ Sprocket ■ Crank ■ Switching damper 02 branch chute ■ Motor ■ @O@ Switch OΦ ■ Roller chain ■ 0 ■ ■ Bevel gear ■ Geneva driver ■ Geneva wheel [Yes] Circle Plate Fig. 2 / lf Shearing 7 loaves

Claims (1)

[Claims] 1) Two or more weighing hoppers are used, the flow of the object to be measured is alternately switched by a switching damper of a branching sheet, and the object to be measured is thrown into the weighing hopper, and the object to be measured is thrown into one of the weighing hoppers. At the same time, in the other weighing hopper, measure the total weight of the weighing hopper, discharge it, and measure the tare after discharge,
A continuous weighing type hopper scale that alternately calculates the true discharge amount and drives the switching damper and two weighing hoppers through an intermittent motion mechanism using one drive motor. Measuring hopper scale. 2) The continuous weighing type hopper scale according to claim 1, wherein in the weighing hopper drive mechanism, a roller chain is used as the torque transmission mechanism. 3) The continuous weighing hopper scale according to claim 1, wherein the weighing hopper has two vertically opposed tanks. 4) In the weighing hopper drive mechanism, a continuous measuring type % type according to claim 1, characterized in that a bevel gear is used in the torque transmission mechanism.5) In the weighing hopper drive mechanism, a Geneva gear is used in the intermittent motion mechanism. The continuous metering type hopper scale according to claim 1, characterized in that a speed-increasing bevel gear is used. 6) The continuous metering type hopper scale according to claim 1, wherein the driven gear is a bevel gear that rotates intermittently in forward and reverse directions in the drive mechanism of the switching damper.