JPH07198465A - Combination weighing apparatus - Google Patents

Abstract

PURPOSE:To achieve a lowering of a running cost by operating gates of hoppers to opening positions and stopping them in place to avoid useless consumption of power. CONSTITUTION:A motor 31 for a pooling hopper is provided above the inside of a gate opening/closing device 20 and a roller 33 is mounted on a rotating shaft 31a thereof through a link member 32. A motor 41 for a weighing hopper is provided below the inside of the opening/closing device 20 and a roller 43 is mounted on a rotating shaft 41a thereof through a link member 42. When the motors 31 and 41 (stepping motors) rotate by 90 deg. according to the number of pulses of a drive signal, the link member 32 and a rod 36 (or link members 42 and 45) reach a dead point state. At this point, the gates of the pooling hopper and the weighing hopper fare fully opened and stopped. Under such a condition, the gage is kept open even when the supply of the power is stopped, thereby enabling the carrying out of work of washing the hoppers or the draining thereof.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combination weighing device having a large number of hoppers to which articles to be weighed are respectively supplied.

[0002]

2. Description of the Related Art Generally, a combination weighing device for weighing various kinds of articles to a predetermined target weight has a plurality of pool hoppers arranged in a circle around an object supply unit and a weighing hopper below each pool hopper. The weight of the objects to be weighed supplied to each weighing hopper is weighed individually, and the combination of the weighing values is used to find the combination of weighing hoppers closest to the predetermined target weight. The object to be weighed having the above-mentioned target weight is obtained by discharging the object to be weighed only from the weighing hopper corresponding to the above item. Then, the weighing hopper that has discharged the object to be weighed as described above is immediately supplied with the object to be weighed for the next weighing from the pool hopper above it, and the object to be weighed is supplied to the pool hopper from the central supply unit. Things are being supplied.

Therefore, a combination weighing device of this type is provided with a plurality of weighing hoppers and a plurality of pool hoppers, but these hoppers are usually washed after the end of the weighing operation.

However, these hoppers are constructed so that the gate is closed when the combination weighing device is stopped, and therefore, when the hopper is to be washed after the end of the weighing operation, washing water is accumulated in the hopper. Therefore, the dirt cannot be sufficiently washed away, or the cleaning air is not sufficiently sprayed, so that the dirt cannot be sufficiently removed.

To address this problem, the actual Kaihei 3-4683
As disclosed in Japanese Patent No. 4 publication, it is conceivable that this type of combination weighing device is provided with a holding means for holding the gates of all the hoppers in the open state. According to this, at the end of the weighing operation, the gates of all the hoppers are held in the open state by the holding means, and in this state, the hoppers are attached to the main body of the weighing device by washing with washing water or washing air. It becomes possible to perform good cleaning while it is attached.

[0006]

However, when the holding means disclosed in the above publication is used, the following problems may occur.

That is, this holding means is "H" so as to open all the gates to the gate opening / closing devices of the intermediate hopper (pool hopper) and the weighing hopper through the full-open holding circuit by operating the full-open switch. It is configured to output a level signal. Therefore, it is necessary to output this "H" level signal while the gate is opened, and stop the operation of the control device of the weighing device. Cannot be done, and during that time, electric power is consumed unnecessarily.

Especially, when the hopper is attached to the weighing device main body after the hopper is washed with water and the gate is left open for a relatively long time for draining water, power is consumed more wastefully. become.

Therefore, the present invention avoids wasteful consumption of electric power when the gates of these hoppers are left open in a combination weighing device having a large number of hoppers, and this kind of combination weighing device is provided. The task is to reduce the running cost of

[0010]

In order to solve the above problems, the present invention is characterized by having the following configuration.

First, the invention according to claim 1 of the present application (hereinafter,
A first invention) is a combination weighing device having a large number of hoppers to which the objects to be weighed are respectively supplied, and a gate opening / closing device for opening and closing gates for discharging the objects to be weighed provided in these hoppers. The device has a configuration capable of holding the gate of each hopper in an open state in a non-power-supply state, and is operated at the end of the weighing operation to instruct to open the gate of each hopper. And a gate control means for receiving the gate opening command signal from the commanding means and activating and stopping the gate opening / closing device to a position where the gate of each hopper is held in an open state. .

The invention according to claim 2 (hereinafter referred to as the second invention) is the same combination weighing device as the above-mentioned first invention, wherein the gate opening / closing device is in a non-powered state and the gate of each hopper is held in an open state. With the configuration that can be done,
When the gate opening command means is operated at the end of the weighing operation to instruct to open the gate of each hopper and the gate opening command signal from the command means, the gate opening / closing device is operated by the gate of each hopper. Gate control means for activating and stopping to a position where it is held in an open state, and power cutoff means for shutting off the power of the weighing device after the gate opening and closing device has stopped at a position where it holds the gate of each hopper in an open state It is characterized by having and.

[0013]

According to the present invention having the above construction, the following effects can be obtained.

According to the first aspect of the invention, when the gate opening command means is operated at the end of the weighing operation, the gate control means causes the gate opening / closing device to operate and stop until the gate of each hopper is opened. Become. Even if the supply of electric power is stopped in this state, the gates of the hoppers are held open by the gate opening / closing device. In the case of washing with water, it is possible to drain water after washing. Therefore, power consumption during this period is avoided.

According to the second aspect of the invention, when the gate opening command means is operated at the end of the weighing operation, the gates of the hoppers are held in the open state and the power is shut off, as in the first aspect of the invention. The means automatically shuts off the power supply of the weighing device. Therefore, in addition to the operation of the first aspect of the present invention, the trouble of shutting off the power source is omitted.

[0016]

EXAMPLES Examples of the present invention will be described below.

First, referring to FIG. 1, a schematic structure of a combination weighing device to which this embodiment is applied will be described. This combination weighing device 1 is of a type in which a plurality of weighing heads are arranged in a circle, The center of the upper part is a supply part 2 of the object to be weighed, and the supply part 2 has a dispersion table 5 installed in the center of a machine base 3 via a vibration exciter 4 and vibrators 6 ... A plurality of supply troughs 7 arranged radially through
... 7 and. Also, these troughs 7 ... 7
A plurality of pool hoppers 8 ... 8 are arranged in a circular shape so as to be respectively located below the tip of each pool hopper 8.
.. 8 are provided below the measuring hoppers 9.

Then, the objects to be weighed are supplied from the distribution table 5 of the supply section 2 to the respective weighing hoppers 9 ... 9 through the respective troughs 7 ... 7 and the pool hoppers 8 ... 8, and these weighing hoppers 9 ... 9. While the weight of the object to be weighed is measured inside,
A combination calculation based on the measured value is performed to find an optimum combination of the weighing hoppers 9 ...
By discharging the objects to be weighed from the weighing hoppers 9 ... 9 corresponding to this optimum combination, the objects to be weighed having the above target weight can be obtained via the collecting chute 10.

Below the supply unit 2, the gate opening / closing device 20 of the pool hoppers 8 ... 8 and the weighing hoppers 9 ... 20 are provided. These switchgear 20 ...
20 are arranged in a circle corresponding to the set of the hoppers 8 ... 8, 9 ... 9 inside the circumference where the hoppers 8 ... 8, 9 ... 9 are arranged, and each one pool hopper 8 is arranged. The weighing hopper 9 and the gate opening / closing device 20 constitute a weighing head.

Next, the structure of the gate opening / closing device 20 will be described.

As shown in FIG. 2, a pool hopper support member 22 is fixedly installed on the upper part of the cover member 21 on the front surface of the gate opening / closing device 20, and on the back surface of the pool hopper 8, this support member 22 is provided. Shafts 81a, 81 engaged with the
The mounting member 81 having b is fixed, and the mounting member 81 is engaged with the support member 22.
The pool hopper 8 is supported on the front surface of the opening / closing device 20.

A weighing hopper support member 23 is provided below the cover member 21 of the opening / closing device 20, and a projection 23a provided on the support member 23 is provided on the back surface of the weighing hopper 9. Engaging recess 91a
An attachment member 91 having an engaging shaft 91b that engages with the support member 23 is fixed, and the weighing hopper 9 is supported by the support member 23 via the attachment member 91.

Here, as shown in FIG. 3, the support member 23 is connected to the other end of the load cell 24, which is provided in the gate opening / closing device 20 and fixed at one end, through the bracket 25. The weight of the weighing hopper 9 (and the object to be weighed in the hopper 9) is loaded on the load cell 24, and the weight is weighed.

Further, as shown in FIG. 2, a pair of gates 82, 82 are provided at the bottom of the pool hopper 8, and a link mechanism 83 for opening and closing these gates 82, 82 is provided in the pool hopper 8. Are installed on the side surfaces of the pair of gates 9 in the lower part of the weighing hopper 9.
2, 92 are provided, and a link mechanism 93 for opening and closing these gates 92, 92 is arranged on the side surface of the weighing hopper 9.

Lever shafts 26 and 27 are projected from the side surface of the cover member 21 on the front surface of the gate opening / closing device 20. The lever members 28 for pool hopper and the lever member for weighing hopper are attached to these shafts 26, 27. 29 are attached respectively. Then, when the upper pool hopper lever member 28 rotates in the A direction, the input link 83a in the link mechanism 83 of the pool hopper 8 is driven in the A1 direction against the return spring 84, whereby the link mechanism 83 is driven. The pair of gates 82 and 82 are opened in a direction away from each other via.

Similarly, the lower weighing hopper lever member 2
When 9 rotates in the B direction, the input link 93a in the link mechanism 93 of the weighing hopper 9 causes the return spring 9 to move.
By being driven in the B1 direction against 4, the pair of gates 92, 92 are opened via the link mechanism 93 in the directions away from each other.

Further, the internal structure of the gate opening / closing device 20 will be described. As shown in FIGS. 3 and 4, a pool hopper motor 31 is provided above the opening / closing device 20.
The rotary shaft 31a is provided with a roller 33 at a position eccentric to the rotary shaft 31a via a link member 32.
Is attached.

On the other hand, the above-mentioned lever shaft 26 is rotatably supported by the cover member 21, and one end of the lever shaft 26 is protruded from the side surface of the cover member 21 to the outside so that the lever member 28 can be rotated.
In the inside of the cover member 21, an arm member 35 having a U-shaped planar shape is fixed to the lever shaft 26 by using a bolt 34, and a rod 36 is installed between the tip portions of both sides thereof. Has been done.

The roller 33 is located immediately below the rod 36, and the rotation of the motor 31 causes the roller 33 to rotate in the A2 direction shown in FIG. 4 via the link member 32 attached to the rotation shaft 31a. When moved, the rod 36 or the U-shaped arm member 35 is shown in FIG. 3 against the compression spring 38 provided between the arm member 35 and the fixing member 37 in the opening / closing device 20. It rotates in the A3 direction, whereby the lever shaft 26 and the lever member 28 shown in FIG. 2 rotate in the A direction in which the gates 82, 82 of the pool hopper 8 are opened via the link mechanism 83. There is.

Here, a stepping motor is used as the motor 31, and the link member 32 and the rod 36 are rotated from the initial position shown in FIG. 4 by 90 ° in the A2 direction according to the number of pulses of the drive signal. It becomes a dead point state where and go straight, and at this time, the gate 8 of the pool hopper 8
2, 82 are configured to be fully opened. Therefore, even if the power supply to the motor 31 is stopped in this state, the gates 82 and 82 are held in the fully opened state. In this case, in order to securely maintain the fully opened state of the gates 82, 82, the motor 31 or the link member 32 is rotated to a position slightly beyond the dead center position, and at this position, the link member 32 is moved in the A2 direction. The rotation may be blocked by a stopper.

A weighing hopper motor 41 is provided below the inside of the gate opening / closing device 20.
A roller 43 is attached to the position la which is eccentric to the rotary shaft 41a via the first link member 42. Then, by the rotation of the motor 41 in the B2 direction shown in FIG. 4,
One end of a second link member 45 whose central portion is rotatably supported by a fixed shaft 44 is provided via the roller 43 and between the second link member 45 and a fixed member 46 in the opening / closing device 20. It is adapted to be driven in the B3 direction against the tension spring 47.

On the other hand, as shown in FIG. 3, the above-mentioned lever shaft 27 is rotatably provided on the cover member 21, and one end of the lever shaft 27 is projected to the outside from the side surface of the cover member 21 to show the lever member shown in FIG. 29 is attached. Also,
Inside the cover member 21, a first arm member 49 is fixed to the lever shaft 27 using a bolt 48, and a second arm member 50 uses the bolt 48 to the first arm member 49. Are linked together.

The lever shaft 27 for this weighing hopper
And the first and second arm members 49 and 50, and the motor 4
Since the above-mentioned load cell 24 is disposed between the first and second arm members 50 and 1, the front end portion of the second link member 45 located below and the top end portion of the second arm member 50 located above are arranged in the vertical direction. They are connected by an extending connecting rod 51.

Therefore, the rotation of the motor 41 causes the second link member 42 and the roller 43 attached to the rotating shaft 41a thereof to move the second link member 42 against the tension spring 47.
When the link member 45 is driven in the B3 direction shown in FIG. 4, the first and second arm members 49, 50 and the lever shaft 27 rotate in the B4 direction shown in FIG. Thus, the lever member 29 shown in FIG. 2 rotates in the direction B for opening the gates 92, 92 of the weighing hopper 9.

Here, a stepping motor is also used as the motor 41, and the first and second links are rotated from the initial position shown in FIG. 4 by 90 ° in the B2 direction according to the pulse number of the drive signal. The members 42 and 45 are in a dead center state where they go straight, and at this time, the gate 9 of the weighing hopper 9
2, 92 are configured to be fully opened. Therefore, even if the power supply to the motor 41 is stopped in this state, the gates 92, 92 are held in the fully opened state, but like the case of the pool hopper 8, the gates 92, 92 are kept open.
In order to securely hold the fully open state of 92, the motor 41 or the first link member 42 is rotated to a position slightly beyond the dead center position, and at this position, B2 of the first link member 42 is reached.
The rotation in the direction may be blocked by a stopper.

Next, the overall control system of the combination weighing device 1 including the control of the gate opening / closing device 20 will be described.

As shown in FIG. 5, this combination weighing device 1
Has a main controller 100, head controllers 101 ... 101 for each weighing head, and a power supply unit 110.

The main controller 100 inputs weight signals from the load cells 24 ... 24 in the gate opening / closing devices 20 ... 20 via the respective head controllers 101 ... 101, and performs a combination calculation based on the weight values indicated by these signals. Is performed to select the optimum combination of weighing heads that achieves the target weight or the weight closest to the target weight. Then, a gate opening / closing signal is output to the head controllers 101 ... 101 of the weighing heads corresponding to the optimum combination so as to open / close the gates 82 ... 82, 92 ... 92 of the pool hoppers 8 ... 8 and the weighing hoppers 9 ... It is like this.

Further, each head controller 101 receives the gate opening / closing signal and receives the gate opening / closing device 2
A driving signal is output to the weighing hopper motor 41 at 0 from the initial position so as to rotate 90 ° in the B2 direction shown in FIG. 4, the gates 92 and 92 of the weighing hopper 9 are opened, and the object to be weighed is lowered. Of the gates 92 and 92 while outputting the drive signal to rotate the motor 41 in the opposite direction by 90 °.
Back to the closed state.

Thereafter, by outputting a drive signal to the pool hopper motor 31 so as to rotate 90 ° in the direction A2 shown in FIG. 4 from the initial position, the gates 82 and 82 of the pool hopper 8 are opened. The weighing hopper 9 that has discharged the weighing object is supplied with the weighing object for the next weighing, and then a drive signal is output to rotate the motor 31 in the opposite direction by 90 °, and the gates 82 and 82 are closed. It is supposed to return to the state.

The power supply unit 110 includes the main controller 100 and each head controller 1.
01, 101, gate opening / closing devices 20 ... 20, and other devices such as the dispersion table 5 and the shakers 4, 6 ... 6 of the supply troughs 7 ... 7 shown in FIG.

Further, in this control system, a remote controller 120 which operates the main controller 100 by a radio signal is used. The remote controller 120 includes various keys 121 ... 121 for setting a target weight and its allowable error range, a display section 122 for displaying the set value, etc., and an ON / ON for instructing start and end of weighing work. Gates 82 ... 82, 9 of all the hoppers 8 ...
A full-open switch 124 for opening 2 ... 92 is provided.

When the full-open switch 124 is operated, the main controller 100 outputs a gate full-open signal to each head controller 101 ... 101, and when each head controller 101 ... 101 receives this full-open signal, Motors 31 and 41 for the pool hopper and the weighing hopper in the gate opening / closing device 20 ... 20
A drive signal is output so as to rotate and stop each of them from the initial position in the A2 and B2 directions by 90 °.

The structure of the power supply unit 110 will be described below with reference to FIG.
Motor circuit power supply unit 11 to which electric power supplied from a C200V external power supply 111 is input via a breaker 112
3, the control circuit power supply unit 115 further input from the breaker 112 via the transformer 114, and the CPU 116 supplied with power from the control circuit power supply unit 115.
And first and second relays 118 and 119 driven by the CPU 116 via a driver 117.

Then, the remote controller 120
When the ON / OFF switch 123 is operated, the main controller 100 turns the CPU 116 ON / OFF.
A signal is input, and when this signal is an ON signal, the coil 118a of the first relay 118 is energized via the driver 117. Also, this first
In the relay 118, when the coil 118a is energized, the contacts 118b, 118c, 118d are closed, and further, by closing the contact 118d, the coil 119a of the second relay 119 is energized and the contact of the second relay 119 is contacted. 119b, 119c and 119d are adapted to be closed.

The contacts 118b, 118c, 119
By closing b, the above-mentioned transformer 114 is removed from FIG.
6 and so on and the contacts 119c and 119d are closed, so that power is supplied to the gate opening / closing devices 20 ... 20 of each measuring head via the motor circuit power source unit 113. Are being supplied.

Next, the operation of this embodiment will be described.

First, during a normal weighing operation, the weight of the object to be weighed in the weighing hoppers 9 ... 9 of each weighing head is determined by the load cells 24 ... 24 in the gate opening / closing devices 20 ... 20.
Are weighed respectively, and the weight signals are input to the main controller 100 via the head controllers 101 ... 101 to perform a combination calculation based on the weighed weight values and obtain a target weight or a weight closest to this. The optimum combination of metering heads to be used is selected. Then, for the head controllers 101 ... 101 of the weighing heads selected to the optimum combination, the gates 92, 92 of the weighing hoppers 9 ... 9 and the gate 82 of the pool hoppers 8 ... , 82
A drive signal is output from the main controller 100 to each head controller 101 ... 101 in order to open and close.

Then, by this drive signal, in the gate opening / closing device 20, as indicated by a symbol a in FIG.
First, the weighing hopper motor 41 rotates 90 ° from the initial position in the direction B2 shown in FIG.
2, 92 are opened, the objects to be weighed in the weighing hopper 9 are discharged into the collecting chute 10, and after a lapse of a predetermined time, they are rotated in the opposite direction by 90 ° and returned to the initial position, whereby the weighing hopper Gates 92 and 92 are closed.

After that, as indicated by reference numeral b in FIG. 7, the pool hopper motor 31 rotates 90 ° from the initial position in the direction A2 shown in FIG. 4, and the gates 82, 82 of the pool hopper 8 are opened. The object to be weighed for the next time is supplied to the weighing hopper 9 that has discharged the object to be weighed from the pool hopper 8, and after a lapse of a predetermined time, the motor 31 rotates in the opposite direction by 90 ° and returns to the initial position. The gates 82, 82 of the pool hopper 8 are also closed. Then, the objects to be weighed are supplied to the pool hopper 8 from the distribution table 5 of the supply unit 2 shown in FIG.

By the way, when the above-mentioned weighing work is finished, the remote controller 120 is turned on.
When the / OFF switch 123 is turned OFF, an OFF signal is input to the main controller 100, and the main controller 100 causes the head controllers 101 ... 101.
The pool hopper and weighing hopper motors 31 and 41 in the respective gate opening / closing devices 20 ... 20 are returned to their initial positions and stopped. Thereafter, an OFF signal is output from the main controller 100 to the power supply unit 110, and the CPU 116 of the power supply unit 110 causes the first and second relays 118 and 11 via the driver 117.
All 9 contacts 118b-11d, 119b-119d
Open to cut off the power supply.

On the other hand, at the end of the weighing work, each hopper 8 ...
When cleaning 8, 9, ... 9, the full-open switch 124 is turned on. At this time, reference signs c and d in FIG.
As shown in, the motors 31 and 41 in the gate opening / closing devices 20 ... 20 which are stopped at the initial position are again rotated by 90 ° in the directions A2 and B2 shown in FIG.
The gates 82 ... 82, 92 ... 92 of all pool hoppers 8 ... 8 and weighing hoppers 9 ... 9 are opened.

Then, when the ON / OFF switch 123 of the remote controller 120 is turned OFF in this state, all the contacts 118b to 118d, 119b to 119d of the first and second relays 118 and 119 shown in FIG. 6 are opened. , The shakers 4, 6 ... 6 and the like, together with the gate opening / closing device 20
The electric power supply to 20 is cut off, and the motors 31 and 41 move from the initial position to A2 and B2 in 9 directions.
It will be completely stopped at the position rotated by 0 °, that is, at the position where the gates 82 ... 82, 92 ... 92 of all the hoppers 8 ...

At this time, in each of the gate opening / closing devices 20 ... 20, the link member 32 and the rod 36 in the gate opening / closing link mechanism of the pool hopper 8 are in a dead point state, or are slightly exceeded the dead point and are rotated by the stopper. It is in a blocked state, and in the gate opening / closing link mechanism of the weighing hopper 9, the first and second link members 42,
45 is in the dead point state, or is slightly beyond the dead point and is prevented from rotating by the stopper. Therefore,
When the supply of electric power is cut off, the gates 82 ... 82, 92 ... 92 of the pool hoppers 8 ... 8 and the weighing hoppers 9 ... 9 are held open.

As a result, it is possible to avoid wasteful power consumption during the washing operation and during draining after washing in the case of washing with water.

In the above embodiment, the remote controller 120 is turned on after the fully open switch 124 is turned on.
The / OFF switch 123 is turned off, but instead of this manual turning off, when a predetermined time elapses after the full-open signal is input from the remote controller 120, the main controller 100 switches the power supply unit 110 An OFF signal is output to the CPU 116 and the first and second relays 11 in the unit 110 are output.
8,119 contacts 118b to 118d, 119b to 1
It may be configured to open 19d. According to this, the fully open switch 112 of the remote controller 120
4 is turned on, the power supply is automatically cut off while the gates 82 ... 82, 92 ... 92 of all the hoppers 8 ... 8, 9 ... 9 are opened.

As the mechanism for holding the gates 82 ... 82, 92 ... 92 in the open state when the power supply is cut off, a cam is used in addition to the mechanism using the dead point of the link mechanism as described above. It is also possible to employ a mechanism.

That is, as shown in FIG. 8 by taking the opening / closing mechanism for the weighing hopper as an example, the cam 42 'is attached to the rotating shaft 41a of the motor 41, and the link member 45 is rotated by the rotation of the cam 42' in the B2 'direction. By lowering the connecting rod 51 'via the', the gates 92, 92 of the weighing hopper 9 are transferred via the mechanism of the embodiment shown in FIGS.
Is configured to open. Then, in that case, a region 4 having a constant radius is used as the maximum lift portion of the cam 42 '.
2a 'is provided, and when the gates 92, 92 are opened, the roller 45 at the tip of the link member 45' is provided in this region 42a '.
Move the motor 41 or cam 42 'to the position where a'contacts B
By rotating in the 2'direction, even if the power supply to the motor 41 is stopped in this state, the gates 92, 92 are reliably held in the open state. Further, this configuration can be similarly applied to the opening / closing mechanism for the pool hopper.

[0059]

As described above, according to the combination weighing device of the present invention, if the gate opening command means is operated at the end of the weighing work, the gate control means causes the gate opening / closing device to open the gate of each hopper. The gate opening / closing device holds the gates of the hoppers in an open state even when the supply of electric power is stopped in this state. Therefore, when cleaning the hopper after the weighing work is completed, it is possible to cut off the power and drain the water after cleaning when cleaning the hopper or washing with water. As a result, the running cost of this type of combination weighing device is reduced.

According to the second aspect of the invention, when the gate opening command means is operated at the end of the weighing operation, the gates of the hoppers are held in the open state and the power is shut off, as in the first aspect of the invention. The means automatically shuts off the power supply of the weighing device. Therefore, in addition to the effect of the first invention, the work efficiency in the cleaning work after the end of the weighing work is improved.

[Brief description of drawings]

FIG. 1 is a schematic view of a combination weighing device to which an embodiment of the present invention is applied.

FIG. 2 is a side view of a hopper and a front portion of a gate opening / closing device.

FIG. 3 is a schematic side view of the inside of the opening / closing device.

FIG. 4 is a schematic rear view of the inside of the apparatus.

FIG. 5 is a control system diagram of the combination weighing device.

FIG. 6 is a circuit diagram showing a configuration of a power supply unit in the system.

FIG. 7 is a time chart diagram showing the operation of the embodiment of the present invention.

FIG. 8 is a schematic view of an essential part of a gate opening / closing device according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Combination weighing device 8,9 Hopper 20 Gate opening / closing device 82,92 Gate 100 Gate control means (main controller) 110 Power cutoff means (power supply unit) 124 Gate opening command means (fully open switch)

Claims (2)

[Claims] 1. A combination weighing device comprising a plurality of hoppers to which the objects to be weighed are respectively supplied, and a gate opening / closing device for opening and closing gates for discharging the objects to be weighed provided in these hoppers. The device is capable of holding the gate of each hopper in the open state in the non-power-supply state, and is operated at the end of the weighing operation to instruct to open the gate of each hopper. When,
Gate control means for receiving the gate opening command signal from the commanding means and operating the gate opening / closing device to a position where the gate of each hopper is held in an open state and stopping the gate opening / closing device is provided. Combined weighing equipment. 2. A combination weighing device comprising a large number of hoppers to which the objects to be weighed are respectively supplied, and a gate opening / closing device for opening and closing gates for discharging the objects to be weighed provided in these hoppers. The device is capable of holding the gate of each hopper in the open state in the non-power-supply state, and is operated at the end of the weighing operation to instruct to open the gate of each hopper. When,
Gate control means for receiving the gate opening command signal from the command means and activating and stopping the gate opening / closing device to a position where the gate of each hopper is held in an open state, and the gate opening / closing device for the gate of each hopper. And a power shutoff means for shutting off the power source of the weighing device after stopping at the position for holding the weighing device in the open state.