JPS6318898Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of an article feeding device in a combination scale.

As shown in FIGS. 1 and 2, a conventional supply device of this type has a plurality of outlet ports 1 on an outer circumferential wall 1a.
It is known that the vibrating dispersion feeder 1 has a structure in which a shutter 2 is provided at each outlet and an intermediate hopper 5 is arranged below the shutter 2.
In this supply device, each shutter 2 is opened and closed up and down as indicated by arrows 4, thereby loading the articles 3 into their corresponding intermediate hoppers 5. The reason why the intermediate hopper 5 is provided is that in a configuration in which the dispersion feeder 1 directly feeds the weighing hopper 6, the feed from the dispersion feeder varies, so it cannot be expected to be fed within a predetermined time. As a method of loading articles into a weighing hopper, an intermediate hopper 5 was required to temporarily store later articles while weighing the articles input earlier. In the figure, 7 is a weighing machine, 8 is a gate opening/closing drive unit,
5a is an intermediate hopper gate, 9 is a vibrator, and 10 is a collection chute. The feeding device for such a combination scale has problems such as the problem that the article gets caught in the gate 5a due to the dispersion of feeding in the intermediate hopper 5, or the article is damaged due to the operation of the shutter 2, and the problem that the gate 5a is damaged. There was a problem with noise caused by opening and closing.

This invention is intended to eliminate the above-mentioned problems by providing a rotary feeder in place of the shutter 2 and intermediate hopper 5 in the conventional device.

This invention will be explained below based on one embodiment shown in the drawings. In FIGS. 3 to 5, parts equivalent to those in FIGS. 1 and 2 are designated by the same reference numerals. The feeding device of this embodiment includes a vibrating dispersion feeder 1 and 10
rotary feeder 20.

The vibrating feeder 1 is the same as that in the conventional apparatus described using FIGS. 1 and 2.

The rotary feeder 20 consists of an envelope 21 and a rotor 22. The envelope 21 is formed into a cylindrical shape with both ends closed, and is arranged so that its center axis is horizontal to a position outside the outlet 1b, and has a cylindrical peripheral wall surface cut out at a position corresponding to the outlet 1b. In this state, a receiving port 23 is provided, and a discharging port 24 is similarly provided apart from the receiving port 23, and the discharging port 24 opens above the weighing hopper 6.

The rotor 22 has three wing sections 27 extending radially outward from the rotating shaft section 26, and a gate section 29 extending from the tip of each of the wing sections 27 in the rotational direction indicated by an arrow 28 in the figure. and each wing 2
A pocket portion 30 is formed between the holes 7 and 7. The rotor 22 is housed coaxially within the envelope 21 , the outer peripheral surface of the gate portion 29 is close to the inner peripheral surface of the envelope 21 , and a rotating shaft is provided on both end walls of the envelope 21 . Both ends of the rotary shaft portion 26 are supported by bearings, and one end of the rotary shaft portion 26 is rotated by an intermittent rotation drive portion 31 at a rate of 1/6 rotation. The above-described intake port 23 and discharge port 24 are both closed by separate gate portions 29 at a predetermined rotation stop position of the rotor 22, and from the closed state, the rotor 22 is 1/6 When it is rotated, the inside of the pocket part 30 on the back side in the direction of rotation of the previous wing part 27 communicates with the intake port 23, and the back side of the wing part 27 of the gate part 29, which was previously blocking the discharge port 24, communicates with the intake port 23. The inside of the pocket portion 30 of the pocket 30 is communicated with each other.

The intermittent rotation of the rotor 22 is performed based on signals issued by the control section of the combination balance.

Note that the weighing hopper 6 and the collection chute 10 are
It is the same as that in the figure and FIG. 2, and 6a is a metering hopper gate.

A combination scale having a supply device configured in this manner operates as follows. Assuming that the vibrator 9 is constantly operating, the articles 3 supplied to the dispersion feeder 1 from above gradually move toward each article outlet 1b. Then, as shown in FIG. 5A, the article 3 is fed into the receiving port 23 of the rotary feeder 20 when the receiving port is in an open state in which the inside of the pocket portion 30 of the rotor 22 is in communication. After this open state is continued for a predetermined period of time by the control section, the receiving port 23 is brought into a closed state where the gate section 29 closes it. That is, the receiving port 23 is opened and closed after a predetermined period of time. Therefore, approximately a predetermined amount of articles 3 will be accommodated in the pocket 30. Since the inside of the pocket section 30 is empty at the start of operation, the intermittent rotation continues until the articles 3 are stored in the two pocket sections 30 as shown in FIG. stand by. Next, when each rotor 22 is rotated by 1/6 rotation according to a command from the control section, the article 3 stored in the pocket section 30 is discharged from the discharge port 24 as shown in FIG. 5C. At the same time, articles 3 are received from the distribution feeder 1 into another pocket 30.
After a predetermined period of time has elapsed, the rotor 22 is rotated 1/6 of a turn and enters a standby state as shown in FIG. 5b. During this time, each weighing machine 7 detects the weight of the article in each weighing hopper 6, and the weight signal is sent to the combination control section. The combination control unit selects the optimal combination by combining the respective detected weights, and issues a discharge command to each of the selected weighing hoppers. Upon receiving the command, the gate 6a of the weighing hopper 6 is opened by the gate driving section 8, and the articles inside are discharged into the collecting hopper 10. When the gate 6a closes after its discharge,
The combination control unit sends a discharge command to the rotary feeder 20 corresponding to the gate 6a, and the rotor 2
2 turns 1/6 and discharges the article into the weighing hopper 6 which has been emptied by the discharge. From then on, as above,
The rotary feeder 20 is in a receiving state at the same time as discharging goods, and after a predetermined time has elapsed, it is in a waiting state with goods stored in the pocket 30, and the weighing machine 7 is in a state where a new product is loaded into its weighing hopper 6. The weighed articles are weighed and a weight signal is sent to the combination control section to perform combination weighing.

As described above, according to this feeding device, articles can be fed to each weighing hopper 6 using the rotary feeder 20 in place of the conventional shutter and intermediate hopper. Since the rotary feeder 20 rotates, it does not generate as much noise as a shutter or hopper gate that moves back and forth. Furthermore, if the rotor 22 is rotated in the direction of the arrow 28 as in the embodiment, it is possible to reliably prevent objects from being caught. That is, when the rotary feeder 20 receives an article into the pocket 30 and finishes receiving the article, the article is transferred between the delivery port 1b and the pocket 30.
In some cases, the gate part 29 of the rotor straddles both sides of the rotor, but with the exception of items that are particularly easy to get caught at the tip, in the case of ordinary small-sized articles, as the gate part 29 of the rotor rises upward, the gate part 29 The tip of the gate part 29 moves to either side naturally, so the tip of the gate part 29 and the envelope 21
This means that objects will not get caught between the two.
Furthermore, this feeding device is characterized in that the rotor 22 has the functions of a conventional shutter and an intermediate hopper (pool hopper). Due to this point, the two
Compared to the case where there are multiple moving parts, since the moving part is one type of rotor, the number of controlled parts is reduced by half, and there is also the advantage that the control system can be simplified.

In the above embodiment, the rotor has three pockets, but in some cases there may be two or more pockets.
It may be nine pieces.

As described above, according to this invention, it is possible to provide an improved article feeding device for a combination scale.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view showing a conventional dispersion feeder with a shutter, FIG. FIG. 3 is a schematic plan view of a combination scale according to an embodiment of this invention, FIG. 4 is a partial longitudinal sectional schematic front view of the same embodiment, and FIGS. 5 a to 5 c are for explaining the operation of the feeding device of the same embodiment. FIG. 6 is a partially vertical partially sectional front view showing different states of the device. 1... Dispersion feeder, 1a... Surrounding wall, 1b...
Delivery port, 3...article, 6...weighing hopper, 6a...
... Weighing hopper gate, 7 ... Weighing machine, 8 ... Gate opening/closing drive section, 9 ... Vibrator, 10 ... Collection chute, 20 ... Rotary feeder, 21 ... Envelope, 22 ... Rotor, 23 ...Reception port, 24...
...Discharge port, 26... Rotating shaft section, 27... Wing section, 2
9...Gate part, 30...Pocket part, 31...
Intermittent rotation drive unit.

Claims (1)

[Scope of utility model registration request] A combination scale having a predetermined number of weighing hoppers includes a vibrating dispersion feeder having a number of normally open article delivery ports corresponding to the number of weighing hoppers on the surrounding wall of the outer periphery of a plate-shaped body, an envelope and its outer circumference. A rotor is provided in the container and is intermittently driven to rotate, and is arranged between each of the above-mentioned delivery ports and a weighing hopper corresponding to the delivery port, and is connected to a receiving port following the delivery port and to the weighing hopper. An article feeding device comprising a rotary feeder having a discharge port provided in the envelope.