JP2562260Y2 - Transfer gate opening and closing control device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for controlling the opening and closing of a transfer gate disposed in a measuring tank of a combination weigher.

[0002]

2. Description of the Related Art An example of a conventional combination weigher is shown in FIG. The combination weigher 41 is composed of a plurality of reams, and is used for temporarily storing one weighing tank 42 for weighing the objects to be weighed to which a series of weighing objects are transferred, and for temporarily storing the objects to be weighed by the weighing tank 42. One auxiliary tank 43 to which the object to be weighed is transferred is constituted. The object to be weighed in the measuring tank 42 is transferred to the auxiliary tank 43 via a transfer gate 42a provided in the measuring tank 42.
The objects weighed and stored in the weighing tank 42 and the auxiliary tank 43, respectively, participate in the combination selection, and the objects selected in the combination selection are distributed to the weighing tank 42 and the auxiliary tank 43, respectively. It is discharged through the provided discharge gates 42b and 43b.

In the drawing, reference numeral 44 denotes a dispersion device, 45 denotes a feeder, 46 denotes a supply tank, 46a denotes a transfer gate, 47 denotes a measuring device, 48 denotes a collecting chute, and 49 denotes a packaging machine.

FIG. 5 is a flowchart showing the operation of the measuring tank 42 and the auxiliary tank 43 in the combination weigher 41 configured as described above. According to the combination weigher 41, the discharge gates 42b and 43b are opened, and the measuring tank 42 and the auxiliary tank 43 are simultaneously discharged (Step S).
1) After that, the object to be weighed is put into the measuring tank 42 (Step S2). Next, it is determined whether or not the object to be weighed has been sufficiently stabilized in the weighing tank 42, that is, whether or not a predetermined stabilization time has elapsed (Step S3). It is checked whether or not the tank 43 is in the "empty" state (step S4). At this time, if the auxiliary tank 43 is in the “empty” state, the object to be weighed is immediately transferred to the auxiliary tank 43 (step S5), and the object to be weighed is transferred to the auxiliary tank 43 and is in the “empty” state. The next object to be weighed is put into the weighing tank 42 located at the position.

On the other hand, in step S4, the auxiliary tank 43
If the object is not in the "empty" state, the object to be weighed waits in the weighing tank 43 until the combination selection time (step S6) and participates in the combination selection (step S7).

[0006]

Normally, the time required for discharging (or transferring), charging and stabilizing an object to be weighed in the weighing tank 42 is determined by selecting the first combination from the weighing cycle (for example, the operation start time (S)). (The time until the time (A)) (see FIG. 6). Therefore,
After the object to be weighed is stabilized in the measuring tank 42, the auxiliary tank 4
When the object to be weighed is immediately transferred from the measuring tank 42 to the auxiliary tank 43 when the container 3 is in the "empty" state, the measuring tank 42 is in the transfer state in the combination selection time (A), and The tank 43 is in an “empty” state, ie, a standby state or a transfer state, before the object is transferred from the measuring tank 42. In the figure, the auxiliary tank 43 is in a standby state.
As a result, the weighing tank 42 and the auxiliary tank 43 are invalid during the combination selection time (A), that is, since the objects to be weighed cannot participate in the combination selection, the number of objects to be weighed that can participate in the combination selection decreases, and There is a problem that it is difficult to establish a combination of objects and the combination accuracy of the combination weigher decreases.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a transfer gate opening / closing control device capable of improving the combination accuracy of a combination weigher.

[0008]

According to the present invention, there is provided a transfer gate opening / closing control device for transferring an object to be weighed by each weighing tank through a transfer gate provided in the weighing tank. It is possible to transfer to an auxiliary tank provided corresponding to the tank for temporary storage, and to adjust to a predetermined weight among the objects to be weighed which are measured and stored in these measuring tanks and / or auxiliary tanks. A transfer gate applied to a combination weigher discharged from the weighing tank and / or the auxiliary tank, wherein the selected weighing objects are combined and selected. A transfer gate opening / closing means for opening and closing the tank gate; and when the time from when the object to be weighed into the weighing tank is stabilized in the weighing tank to when it participates in combination selection is shorter than a predetermined time, the transfer is performed. Reduce the tank gate Kutomo characterized in that it comprises a control means for controlling the transfer tank gating means so as to close up the combination selected time.

[0009]

According to the present invention, the transfer gate opening / closing control device is used when the time from when the object to be weighed into the weighing tank is stabilized in the weighing tank to when it participates in combination selection is shorter than a predetermined time. Under the control of the control means, the transfer gate is closed by the transfer gate opening / closing means at least until the combination selection time. Therefore, the object to be weighed put in the measuring tank is stabilized in the measuring tank, and is not immediately transferred to the auxiliary tank, but is stored in the measuring tank at the above-mentioned combination selecting time and the combination is selected. You can participate in. As a result, the combination of the objects to be weighed is easily established, and the combination accuracy of the combination weigher is improved.

[0010]

Embodiments will be described below with reference to the drawings. In the combination weigher to which the transfer gate opening / closing control device of the present invention is applied, the same parts as those of the conventional combination weigher are denoted by the same reference numerals, and description thereof is omitted.

FIG. 1 shows an example of the transfer gate opening / closing control device of the present invention. In the transfer gate opening / closing control device 11, a weighing device 12 constituted by, for example, a load cell is provided in each weighing tank 42.
The objects transferred to the measuring tank 42 are measured by the measuring devices 12. Analog weighing data obtained by weighing the object from the weighing device 12 is amplified by the amplifier 13 and supplied to the multiplexer 14, and is sequentially converted into digital weighing data by the A / D converter 16 under the control of the microcomputer 15 as control means. The data is converted and supplied to the microcomputer 15. Then, a predetermined program is executed by the microcomputer 15 based on the digital weighing data and the like, and, for example, the air cylinder 17 as a transfer gate opening / closing means is driven to thereby drive the weighing tank 4.
The transfer gate 42a provided in 2 is opened and closed.

The microcomputer 15 includes a central processing unit (CPU) 15a for executing the program, and a read-only memory (ROM) 15b for storing the program.
And a readable / writable memory (RAM) 15c as a working memory necessary for executing the program and as various registers assigned to store the digital weighing data and the like.

FIG. 2 is a flowchart showing the operation of the weighing tank 42 and the auxiliary tank 43 in the combination weigher to which the transfer gate opening / closing control device 11 thus configured is applied.
FIG. 3 shows a time chart. According to this combination weigher, after the discharge gates 42b and 43b are opened and the measuring tank 42 and the auxiliary tank 43 are simultaneously discharged (Step S1), the object to be weighed is put into the measuring tank 42 (Step S2). . Next, the object to be weighed is placed in the measuring tank 42.
In step S3, it is determined whether or not a predetermined stabilization time has elapsed (step S3).
It is checked whether or not is in the "empty" state (step S4).
At this time, if the auxiliary tank 43 is in the "empty" state, the remaining time of the weighing cycle, that is, from the time when the object to be weighed put into the weighing tank 42 is stabilized in the weighing tank 42 to the combination selection time (B). It is determined whether the time is shorter than the predetermined time α (step S5). Then, if the auxiliary tank 43 is not in the "empty" state in step S4, or step S5
If the remaining time of the weighing cycle is shorter than the predetermined time α, the object to be weighed waits in the weighing tank 42 until the combination selection time (B) (Step S6) and participates in the combination selection (Step S6). S7).

On the other hand, if the remaining time of the weighing cycle is equal to or longer than the predetermined time α in step S5, the object to be weighed is immediately transferred to the auxiliary tank 43 (step S8). The next object to be weighed is put into the weighing tank 42 which is in the “empty” state.

Therefore, when the remaining time of the weighing cycle is shorter than the predetermined time α, the object to be weighed is made to stand by in the weighing tank 42 until the combination selection time (B). Measuring tank 42
Is effective, that is, the objects to be weighed put in the weighing tank 42 can participate in the combination selection. As a result, the combination of the objects to be weighed that participated in the combination selection is easily established, and the combination accuracy of the combination weigher is improved.

If the object to be weighed is not selected in the combination selection time (B), the object to be weighed is transferred to the auxiliary tank 43 so that the object to be weighed participates in the next combination selection. be able to.

[0017]

As described above, according to the transfer gate opening / closing control device of the present invention, the number of objects to be weighed that can participate in the combination selection is prevented from decreasing,
Since the combination of the objects to be weighed is easily established and the combination accuracy of the combination weigher is improved, the work efficiency of the production line including the combination weigher can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic view of a combination weigher to which a transfer gate opening / closing control device according to an embodiment of the present invention is applied.

FIG. 2 is a flowchart illustrating the operation of a measuring tank and an auxiliary tank in the combination weigher to which the transfer gate opening / closing control device according to the embodiment of the present invention is applied;

FIG. 3 is a time chart showing the operation of the measuring tank and the auxiliary tank in the combination weigher to which the transfer gate opening / closing control device according to the embodiment of the present invention is applied;

FIG. 4 is a schematic view of a conventional combination weigher.

FIG. 5 is a flowchart showing the operation of a measuring tank and an auxiliary tank in a conventional combination weigher.

FIG. 6 is a time chart showing the operation of a measuring tank and an auxiliary tank in a conventional combination weigher.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Opening / closing control device of transfer gate 12 Metering device 13 Amplifier 14 Multiplexer 15 Microcomputer 15a Central processing unit (CPU) 15b Read only memory (ROM) 15c Read / write memory (RAM) 16 A / D converter 17 Air cylinder

Claims (1)

(57) [Scope of request for utility model registration] 1. An object to be weighed measured by each measuring tank is transferred for temporary storage to an auxiliary tank provided corresponding to each measuring tank via a transfer gate disposed in the measuring tank. The objects to be weighed are selected from among the objects to be weighed and stored in the weighing tank and / or the auxiliary tank so as to conform to a predetermined weight. A transfer gate opening / closing control device applied to a combination weigher in which a weighing object is discharged from the weighing tank and / or the auxiliary tank, wherein the transfer gate opening / closing means for opening and closing the transfer gate; When the time from when the object to be weighed is stabilized in the weighing tank to when it participates in combination selection is shorter than a predetermined time, the transfer tank is closed so that the transfer gate is closed at least until the combination selection time. Get Switching controller for Utsuriso gate, characterized in that it comprises a control means for controlling the door opening and closing means.