JPH0487984A - Double discharge type equipment - Google Patents

Abstract

PURPOSE:To increase containing capacity of a measuring hopper, by extending downward the opposite slant plates of the front and rear part of a hopper from the lower edge opening to form the right and left symmetrical downward-slanting edges at the opposite plates and by providing shutter plates of the front and rear direction at the down-slanting edges and an opening-adjuster on the shutter plates. CONSTITUTION:Materials 10 to be measured are lowered in a vertically rectified condition along the opposite slanting plates 3, 3 between the front and rear opposite plates 3, 3 from the lower edge opening 2' of a feed hopper 2. The inner pressure within the hopper 2 is kept uniform since the hopper is opened and closed by shutting plates 4, 4 arranged at the symmetrical position and the choking, scattering, and leaking of the materials can be prevented on closing and the measuring accuracy can be increased as uniformly fed even when large volume and small volume of materials 10 are fed. A small feed opening is formed by the distance of the lower edge opposite against the shutting plates 4, 4. At the upper face of the materials 10 fed in the measuring hopper 11, a reposed angle is formed at both sides of the nearly flat top and hence, there is an effect to reduce an unnecessary space in the hopper 11 and also a little feed volume is adjustable by an opening adjuster 5.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a double-type loading device for loading a large quantity of an object to be weighed and then a small quantity of an object to be weighed into a weighing hopper of a quantitative scale.

``Prior Art'' Conventionally, a feeding device for a weighing hopper of a metering scale has a large feeding fan-shaped gate with a small feeding hole formed in the feeding hopper, and the flowing material is cut horizontally from one direction by the gate. The system was designed to perform input control (Fig. 5), and therefore had the following problems.

(1) Since the gate cuts at right angles to the flow of material, the flowing material will be drawn in, causing clogging, and jamming will occur between the hopper and the gate, and a gap with the thickness of the jamming amount is required. Leakage occurs from the gaps, and material scatters during cutting.

(2) Also between the large and small gates, leakage and scattering occur due to the gap between the hopper and the large and small gates.

(3) Adjustment of large and small slots is not possible.

(4) The small inlet is a small inlet by making a small hole on the bottom of the large gate, but the material comes to rest in the hopper, and the pressure in the upper part gradually increases, causing the hopper internal pressure to constantly change. , the material flows into the small inlet, resulting in a complicated flow of material that is not constant, and the small inlet is clogged with the material, resulting in a very irregular feeding method and reducing measurement accuracy.

Generally, quantitative scales input the amount of head (amount in the air), so if the flow rate is not constant, it will cause variations in accuracy and time.

“Problems to be Solved by the Invention” The present invention solves the above problems (1), F2), (3), and (4), and also solves the problems of (1), F2), (3), and (4) above, and also solves the problems in the weighing hopper because the space above the weighing object placed in the weighing hopper is small. The purpose is to improve the detention rate.

"Means for Solving the Problems" In order to achieve the above object, the present invention extends the front and rear opposing plates of the hopper downward from the lower end opening of the weighed object input hopper provided in the machine frame, and A symmetrical downwardly inclined edge is formed on the plate from both left and right sides toward the center line, an opening and closing plate in the front and back direction is provided on the downwardly inclined edge, and an opening adjustment device for the opening and closing plate is provided. A double input device that can form a small input slot with a gap between the two stages has downwardly inclined edges formed in upper and lower stages, and guide inclined plates in the front and back direction are installed on the left and right upper downwardly inclined edges. The double input device according to the invention, wherein a large input port is formed between the lower edges of the plates, the interval between the guide inclined plates is adjustable, and the large input port is adjustable. It is constituted by the double type loading device according to the first or second aspect of the invention, which is provided with a safety gate that can be rotated in the left-right direction from directly below the middle.

"Operation" Therefore, the object to be weighed 1o, such as powder or granular material, is supplied to the input hopper 2. Of course, in this state, the longitudinal opening/closing plate 4.4 is closed as shown in FIGS. 3 and 4.

In this state, when the opening/closing plate 4.4 is opened left and right and the safety gate 9 is simultaneously rotated to the left or right, a large The object to be weighed 10 is loaded into the weighing hopper 11 through the input port 8 (FIGS. 3 and 4 (b)). Then, when the opening adjustment device 5 is operated, the opening/closing plate 4.4 is closed to a width narrower than the width of the large input port 8 and stopped, and the small input starts (
3 and 4 (c)), weighing is started. Immediately after the adjusting device 5 operates to close the opening/closing plate 4.4, the safety gate 9 returns to its original position (the opening/closing plate 4.4) directly above the head 10' (FIG. 4(D)). (directly below the closed bottom edge of)
(Fig. 3, Fig. 4 (A)), and the weighing hopper 11
The weighing operation ends. After weighing, the lower gate 12 of the hopper 11 is opened and closed, the object to be weighed 10 falls from the hopper 11, and the same operation as described above is repeated. Large input port 8
The large amount of input can be adjusted by adjusting the interval between the lower edges of the left and right longitudinal guide inclined plates 7.7, and impurities are caught between the opposing lower edges of the opening/closing plate 4.4. The resulting leakage can be caught by the safety gate 9 and the fall can be prevented.

``Embodiment'' A rectangular cylinder-shaped object to be weighed input hopper 2 is provided in a machine frame 1, and front and rear facing plates 3.3 extend downward from a rectangular lower end opening 2'. This opposing plate 3.3 has bilaterally symmetrical downwardly inclined edges 3', 3', and 3', which extend from both left and right sides of the opening 2' toward the upright center NIA c, and have two upper and lower stages.
A guide inclined plate 7.7 facing in the front-rear direction is installed on the left and right upper downwardly inclined edges 3', 3'', and a large input port is surrounded by the lower edge of the guide inclined plate 7.7 and the opposing plate 3.3. 8. The width of the large input port 8 in the left-right direction is determined by a female screw 14 rotatably provided on the guide inclined plate 7.7 with a pin 13.
．． 14 with opposite direction screws 15, and by rotating the screws 15 in the forward and reverse directions, the lower edge of the inclined plate 7.7 can be adjusted by moving the lower edge in the left and right direction. The area of can be adjusted. Furthermore, opening/closing plates 4.4 in the front and rear directions are arranged on the left and right lower downwardly inclined edges 3', 3', respectively, and arm plates 4 provided at the front and rear of the opening/closing plates 4.4, respectively.
The upper ends of ' and 4' are attached to the side of the input hopper 2 with pins 16.
．． 16, and can be opened and closed from the closed position shown in Fig. 3 (A) to the open position shown in Fig. 3 (Fig. 1) about the pin 16.16. This can be done by a hydraulic cylinder 17.17, and this cylinder 17.17 is provided with an opening adjustment device 5 slidably adjustable along the cylinder 17.

This adjusting device 5 is formed by a proximity switch that senses the lowering of the piston 17' in the cylinder 17, and when the piston 17' has lowered to a certain position, it issues a command signal and controls the solenoid valve to control the lowering. It is to stop the
At the stop position, the rotation of the arm plates 4', 4' and the left and right opening/closing plates 4.4 is stopped, and at the stopping position, the gap between the lower edges of the opening/closing plates 4.4 is maintained. A small inlet 6 (FIG. 4(C)) can be formed.

Further, fan-shaped arm plates 9', 9' are attached to pins 18 on the sides of the hopper 2.
A safety gate 9 is installed at the lower end of the arm plates 9', 9', and a driving cylinder 20 is connected to the operating arm 19 provided at the upper end of the arm plates 9', 9'. 20, move the safety gate 9 from the position shown in FIG.
It can be rotated to the position shown in Figure (B).

The opening/closing device of the opening/closing plate 4.4 is the queen hydraulic cylinder 17.
．． It is possible to use a limit switch for the opening adjustment device 5, not only the opening adjustment device 17 but also an electric cylinder. Note that the reference numeral 21 in the figure is an electronic scale (load cell) of the weighing hopper 11.

"Effects of the Invention" Since the present invention is configured as described above, the object to be weighed 10 is moved from the lower end opening 2' of the input hopper 2 to the front and rear opposing plates 3.3 in the vertical direction along the opposing plates 3.3. rectified into a downward direction,
In addition, since it is opened and closed by the opening/closing plates 4.4 arranged at symmetrical positions, the internal pressure within the input hopper 2 is maintained in a balanced state.
In addition, it is possible to prevent material clogging, scattering, and leakage when closing (in addition, the object to be weighed 10 is introduced at a constant flow rate in large and small amounts, improving measurement accuracy. 6 is formed by the gap between the opposing lower edges of the opening/closing plate 4.4, and the upper surface of the object to be weighed 10, which has been put into the weighing hopper 11, forms an angle of repose on both sides of the approximately horizontal peak. The hopper 11 also has a different conical top surface.
This has the effect of reducing wasted space inside the container, and the opening adjustment device 5 allows adjustment of a small amount of input.

In addition, even for a large amount of input, the distance between the lower edges of the guide inclined plate 7.7 can be adjusted to correspond to the size of the measurement.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the double-type charging device of the present invention, Fig. 2 is a partially cutaway side view of Fig. 1, and Fig. 3 (a), (b), and (c).
The figures are front views of closed, large-loading, and small-loading states, respectively.
Figures (a), (b), (c), and (d) are front views of the state before loading, large loading, small loading, and loading cut, respectively, and Fig. 5 is a front view of a conventional loading device. 1. Machine frame, 2. Hopper for inputting objects to be weighed, 2'.. Lower end opening, 3.. Opposing plate, C.. Center line, 3', 3".
Downward inclined edge, 4. Opening/closing plate, 5. Opening adjustment device, 6.
・Small input port, 7.・Guide slope plate, 8.・Large input port, 9.
・Safety gate.

Claims (1)

[Scope of Claims] (1) The front and rear facing plates of the hopper are extended downward from the lower end opening of the object-to-be-weighed input hopper provided in the machine frame, and the front and rear facing plates of the hopper are extended from both left and right sides toward the center line. A symmetrical downwardly inclined edge is formed, an opening/closing plate is provided in the front/rear direction on the downwardly inclined edge, and an opening adjustment device for the opening/closing plate is provided, so that a small slot can be formed by the gap between the opening/closing plates. Double loading device. (2) The downwardly inclined edges are formed in two stages, upper and lower, and a guiding inclined plate in the front and rear direction is installed on the left and right upper downwardly inclined edges, and a large input slot is formed between the lower edges of the guiding inclined plate. 2. The double-type input device according to claim 1, wherein the interval between the guide inclined plates is adjustable, and the large input opening is adjustable. (3) Claim (1) or (2), further comprising a safety gate that is rotatable in the left-right direction from directly below the middle of the left and right opening/closing plates.
Dual loading device as described.