JPH01277720A - Gold particle feed apparatus in automatic gold balance - Google Patents

Abstract

PURPOSE:To continuously perform weighing without interruption, by supplying a definite amount of gold particles, which preliminarily pass an outflow control weir by the operation of a vibrator, to a quantitative hopper by opening and closing the shutter provided to the outlet of the hopper by a photosensor. CONSTITUTION:The gold particles 3 supplied to a hopper 4 from a quantitative supply hopper 5 fall to be supplied to a feeder 2 vibrated by a solenoid 1 and are fed by the vibration of the feeder 2 to fall from the opened leading end of a shutter 17 by the cylinder 16 operated simultaneously with the starting of the vibration of the feeder 2 to be supplied. The amount of the gold particles 3 on the feeder 2 during vibration is always monitored by two photosensors 15 provided above the feeder 2 and, when the amount of the gold particles 3 becomes a definite amount or less, a cylinder 12 is operated by the photosensors 15 to open the shutter 13 at the outlet 11 of the quantitative supply hopper 5 for a definite time predetermined by a timer.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement of a gold grain feeding device in an automatic gold weighing device.

(Prior Art) An automatic gold weighing device consists of a preliminary weighing device and a precision weighing device, and the precision weighing device is divided into a gold powder weighing section and a gold particle weighing section.

The gold grain feeding device, which is the gold grain weighing section, is shown in Fig. 3 (a) and (b).
As shown in the figure, a feeder 2 is vibrated by an electromagnetic solenoid 1.
and a hopper 4 that supplies gold grains 3 to the feeder 2.The hopper 4 supplies a certain amount of gold grains 3 to the feeder 2, and the feeder 2 is vibrated by the electromagnetic solenoid 1. The weighed gold grains 3 are dropped.

(Problems to be Solved by the Invention) In order to shorten the weighing time in the automatic gold weighing device, it is essential to shorten the time for weighing gold powder. It is essential to improve the weighing accuracy of gold grains. That is, the condition is satisfied if the weighing value of the gold particles is closest to the final weighing value. In order to improve the accuracy of weighing gold grains, it is necessary to optimize the movement of gold grains in a feeder that sends gold grains.

However, in the above-mentioned gold grain feeding device, the amount of gold grains 3 supplied onto the feeder 2 changes depending on the amount of gold grains 13 in the hopper 4, but since the vibration of the feeder 2 by the electromagnetic solenoid 1 is constant, The amount of gold particles 3 falling from the tip of the container varied, resulting in poor weighing accuracy and difficulty in sending gold particles 3 of the desired weight.

Furthermore, after the vibration of the feeder 2 by the electromagnetic solenoid 1 has ended, the gold particles 3 may fall from the tip of the feeder 2, resulting in over-weighing.

(Object of the Invention) The present invention was made to solve the above problems, and it is possible to keep the amount of gold grains supplied onto the feeder constant, and also prevent the gold grains from falling from the tip of the feeder after weighing is completed. The object of the present invention is to provide a gold particle feeding device in an automatic gold weighing pot device.

(Means for Solving the Problems) To solve the above problems, the gold grain feeding device in the automatic gold weighing device of the present invention includes a feeder that vibrates by an electromagnetic solenoid, and a hopper that supplies gold grains to the feeder. In the gold grain feeding device, a fixed quantity supply hopper for gold grains is provided above the feeder, which has an internal outflow adjustment weir, a shutter at the exit, and a vibrator on the outside. The feeder is characterized in that a photo sensor is provided to monitor the amount of gold grains and instruct opening/closing of the shutter, and the shutter is provided at the tip of the feeder.

(Function) In the gold grain feeding device of the present invention configured as described above, the amount of gold grains on the vibrating feeder is monitored by the photo sensor provided above the feeder, and the amount of gold grains is kept below a certain amount. Then, the photo sensor opens and closes the shutter at the outlet of the metered supply hopper, and a certain amount of gold particles that have passed through the outflow adjustment weir are supplied to the hopper by the operation of the vibrator.

The gold grains supplied to the hopper are dropped onto the vibrating feeder by an electromagnetic solenoid, and are sent by the vibration of the feeder, and a roughly constant amount of gold grains are delivered from the tip of the feeder whose shutter has been opened by the operation of the cylinder. is dropped and weighed. - When a substantially constant amount has been weighed, the vibration of the feeder by the electromagnetic solenoid ends, and the shutter at the tip is closed, so that the gold particles do not fall.

(Embodiment) An embodiment of the gold particle feeding device in the automatic gold weighing device of the present invention will be described with reference to FIGS. In a gold particle feeding device consisting of a hopper 4 for supplying gold particles 3, a hopper 5 for quantitatively supplying gold particles 3 is placed above the hopper 4.
will be established. This quantitative supply hopper 5 is supported by a clamp lever 8 attached to the upper end of a support column 7 that supports the hopper 4 via an arm 6, and has an internal outflow adjustment weir 9 for gold grains 3.
The outflow regulating weir 9 is provided with two slits 10 at its lower part. A shutter 13 that opens and closes by the operation of a cylinder 12 is provided in the middle of the inclined outlet 11 at the lower part of the quantitative supply hopper 5, and a vibrator 14 is attached to the lower outside.

Two photosensors 15 are installed above the feeder 2 in the longitudinal direction of the feeder 2 to monitor the amount of gold grains 3 on the feeder 2 and to instruct the shutter 13 to open or close when the amount is below the amount. Provide an interval.

A shutter 17 is provided at the tip of the feeder 2, which is opened and closed by the operation of a cylinder 16.

The opening/closing time of the shutter 13 is regulated by the operation of the cylinder 12 by a timer (not shown), and the shutter 17 is opened/closed at the same time as the feeder 2 starts and ends weighing.

In the gold grain feeding device of the embodiment configured as described above, the gold grains 3 supplied from the quantitative supply hopper 5 to the hopper 4 are dropped and supplied onto the vibrating feeder 2 by the electromagnetic solenoid 1, and the vibration of the feeder 2 is The shutter 17 is sent by the actuation of the cylinder 16 at the same time as the feeder 2 starts vibrating.
The gold grains 3 fall from the open end of the container and are supplied. Two photosensors 15 installed above the feeder 2 constantly monitor the amount of gold particles 3 on the vibrating feeder 2, and when the amount of gold particles 3 falls below a certain amount, the photosensors 15 The shutter 13 at the outlet 11 of the quantitative supply hopper 5 is activated by a timer (not shown) in advance by operating the cylinder 12.
It will remain open for a certain period of time. the result,
Due to the operation of the vibrator 14, a certain amount of gold particles 3 that have passed through the flow pressure adjustment weir 9 are supplied to the hopper 4, and are further dropped from the hopper 4 onto the vibrating feeder 2, so that the feeder The gold rL3 above 2 will always be sent in a constant amount with no excess or deficiency. Therefore, a fixed amount of gold grains 3 always fall from the tip of the feeder 2 and are weighed. Then, when the vibration of the feeder 2 by the electromagnetic solenoid 1 stops and the weighing of the gold particles 3 is completed, the shutter 17 at the tip of the feeder 2 is closed, so that the gold particles 3 will not fall.

(Effects of the Invention) As can be seen from the above explanation, according to the gold grain feeding device of the present invention, the amount of gold grains supplied onto the feeder can be kept constant, and the gold grains can be fed on the feeder without any interruption. Since it is possible to always feed a fixed amount of gold particles, a fixed amount of gold particles always fall from the tip of the feeder and are weighed. Furthermore, since the tip of the feeder is closed by the shutter immediately after the weighing is finished, there is no chance of gold particles falling and over weighing.

Therefore, the accuracy of weighing gold particles is improved.

Further, according to the gold particle feeding device of the present invention, weighing can be carried out continuously without interruption, so that weighing time is shortened and weighing efficiency is improved.

[Brief explanation of the drawing]

Fig. 1 is a front view of the gold particle feeding device in the automatic gold weighing device of the present invention, Fig. 2 is a side sectional view thereof, and Fig. 3 (a) Co
)) are a front view and a side view of a gold grain feeding device in a conventional automatic gold weighing device. Applicant Tanaka Kikinzoku Kogyo Co., Ltd. 3 1 1! ] Spear 2

Claims (1)

[Claims] 1. In a gold grain feeding device in an automatic gold weighing device consisting of a feeder vibrated by an electromagnetic solenoid and a hopper that supplies gold grains to the feeder, above the hopper,
An outflow adjustment weir is provided inside, a shutter is provided at the outlet, and a fixed quantity supply hopper for gold grains is provided outside with a vibrator, and above the feeder, the amount of gold grains is monitored and instructions are given to open and close the shutter. 1. A gold particle feeding device for an automatic gold weighing device, characterized in that a photo sensor is provided to detect the feeder, and a shutter is provided at the tip of the feeder.