JPS6188113A - Goods shelf device - Google Patents

Abstract

PURPOSE:To rationalize goods control work by controlling the oscillation frequency of a crystal resonator by the output of a load sensor supporting a goods shelf and calculating gross weight or the number of the goods on the shelf from a variation of the oscillation frequency. CONSTITUTION:Holding parts 16 of both ends of the load sensor 14 are inserted between a shelf plate and a supporting plate on which the goods are put. When the goods are put on the shelf, a beam part 17 is deformed as per a dotted line and the crystal resonator 18 stuck to a node part of an oscillation part 15 sustains the stress. The crystal resonator 18 is connected with an oscillation circuit 19 and the oscillation frequency is changed according to the magnitude of the stress. Weight or the number of the goods put on the goods shelf is calculated from the variation of the frequency. Hereby, the goods control work is rationalized.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an article weighing and counting shelf device that can automatically detect and display the total weight and total number of articles placed on a shelf.

Traditionally, inventory management work at warehouses, department stores, markets, stores, etc. involves actually counting the number of items on shelves and recording them in a ledger.

Recording work such as filling out information on cards is required, but this inventory management work requires a great deal of effort and time.

The main object of the present invention is to provide a novel article weighing and counting shelf device that automatically detects and displays the total weight and total number of articles when the articles are placed on the rack.

In the article shelf gc allowance according to the present invention, each shelf on which articles are placed is supported by a load sensor, and the weight of the article placed on the shelf is detected as a change in the oscillation frequency of the crystal oscillator of the load sensor. The present invention is characterized in that it is equipped with a device R that measures and displays the articles on the shelf based on the detected value, and counts and displays the total number of articles based on the measured value and the standard weight of the articles. It is something.

Hereinafter, the present invention will be described in detail based on drawings showing embodiments thereof.

In FIGS. 1 to 4, (1 (I) is an article shelf device, which is configured into a multi-tier column with a large number of shelf boards 0 and supports @ that support them.

Each shelf plate is commonly supported at its four corners by load sensors α4 disposed on receiving plates 03 protruding from the support pillars.

As shown in FIG. 4, the load sensor α→ is composed of two metal tuning forks that are butted against each other and integrated to form a main part of the structure. That is, αe is the vibrating part of the tuning fork.
When the oscillation circuit a field is connected to J and the load sensor receives a load from the total weight of the items on the shelf, the central beam αη deforms as shown by the dotted line, thereby causing the crystal oscillator to absorb stress. The oscillation frequency changes accordingly.

Further, the amount of change at maximum load is made to be about a factor of 10 at no load. Oscillation circuit - is a crystal oscillator (G)
This is to drive the frequency output.

In the embodiment described above, the load sensor α4 is arranged to operate under a compressive load, but as shown in FIG.
The shelf board @ may be suspended by the force of the load sensor α attached to (to) via a hanging tool, and the configuration may be such that the shelf board @ is operated by a tensile load.

Further, as shown in FIG. 7, if a structure is adopted in which both end surfaces of the shelf board are suspended by Y-shaped hanging tools C21), the number of load sensors α can be reduced to two. A few more. A structure may be adopted in which the central portion of the shelf board is supported by a load sensor.

The graph in FIG. 5 shows the relationship between the magnitude of the load applied to the load sensor α4 and the oscillation frequency of the sensor due to compression or tensile force. Load (F) and oscillation frequency (f)
is expressed by the following equation.

F medium A (fo-1) + B (Qi-19 Here, (fo) is the oscillation frequency at no load.

(A) and (B) are calculation constants. This allows the frequency (
By measuring f), the magnitude of the load can be determined.

FIG. 8 shows an example of an electric circuit that measures the total weight of articles on each shelf using a load sensor, and further counts and displays the total number of articles.

@ is a buffer, (2) is a switch, 124 is a frequency reduction circuit, (1) is an oscillator, (1) is an AND circuit, @ is a frequency counter, (Foundation) is a tare circuit, and a wire is a logic circuit.

(1) is a correction circuit, 0) is a weight calculation circuit, g4 is a number calculation circuit, Q is a display circuit, and ■ is a control circuit.

Shelf board 0',! The load sensor α4 placed in the XA pan is oscillated by an oscillation circuit (the oscillation frequency is approximately 7 decreases.In this case.

It is designed to vary over a range of approximately 10 inches at maximum load.

The output of the oscillation circuit passes through the buffer (c) and enters the switch. The switching device has a load sensor α on all shelves.
The output is sequentially switched from 4 to 1st stage frequency reduction circuit KG.
send to While the output of this frequency reduction circuit (c) is being output, the AND circuit (e) is open, and during that time the oscillator)
The number of waves (10MH,) passing through the AND circuit is counted by a frequency counter. The number of counts is proportional to the total weight of the articles being applied to the load sensor α.

Next, the total weight of the article weighed by the frequency counter (1) also includes the weight of other members such as shelf boards, so that amount is subtracted by the tare subtraction circuit (goods), and further by the correction circuit (2).
7), the temperature change at load sensor 0 station, atmospheric density,
The weight calculation circuit calculates the total weight of the article by summing the corrected values of the four load sensors on the shelf.

This is displayed on the display.

When an article is placed on or removed from the shelf plate, the output frequency of the load sensor α4 increases or decreases, so that the new total weight is displayed. By switching the signal using the switching circuit (E).

After going around all the shelves, the calculation of the total IT is repeated again starting from the first shelf. If you set this cycle time to CL5 seconds to 1 second, you can place items on the shelf,
A new total weight will be displayed each time you unload.

As for industrial products, the weight of SR products is constant due to standardization, so in order to store the value in the logic circuit, it is necessary to input it by key operation from the controller, or to store one or more items on a shelf. The total number of articles obtained by the i' calculation circuit Qυ is calculated by dividing M;, k by the standard weight. This can be displayed on the display.

As described above, according to the article shelf device according to the present invention, the total weight and total number of articles on a large number of shelf boards can be measured instantly.

Speeding up warehouse management that stores a large number of products or parts, etc.
It can greatly contribute to labor saving.

[Brief explanation of the drawing]

FIG. 1 is a front view of an article shelf device showing an embodiment of the present invention, FIG. 2 is a side view, and FIG. 3 is an enlarged front view of the main part of the shelf board.
FIG. 4 is a perspective view of the load sensor, and FIG. 5 is a graph showing the characteristics of the load sensor. FIG. 6 is a front view of a main part of a shelf board according to another embodiment. FIG. 7 is a side view of the main part of the shelf board according to still another embodiment. FIG. 8 is a control diagram of the article shelf device. a... Goods shelf device, (11)... Shelf board, a2...
・Strut, U...Socket plate, a4...Load sensor, (to)
...One vibrating part of a tuning fork...Gripping part, (B)...Beam part, Cry...Crystal oscillator, Four...Oscillating circuit, (E)
...hanging tool, @...hanging tool, kiln...buffer. (E)...Switcher, (Foundation)...Frequency reduction circuit, (
e)...oscillator. (c)...AND circuit, layer wave number counter for ■, @...
・Tare weight subtraction circuit, @...logic circuit, (7)...correction circuit, @...weight calculation circuit S@...piece count calculation circuit,
)...Indicator, ■...Control circuit. Patent applicant Busicon Co., Ltd. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 R1 air← -Tensile load! 3 people (F)

Claims (2)

[Claims] (1) Each shelf board on which items are placed is supported by a load sensor, and the weight of the item placed on the shelf board is detected as a change in the oscillation frequency of the crystal oscillator of the load sensor, and from the detected value. An article shelf device characterized by being equipped with a device that measures and displays the total weight of articles on a shelf board. (2) Each shelf board on which items are placed is supported by a load sensor, and the weight of the item placed on the shelf board is detected as a change in the oscillation frequency of the crystal oscillator of the load sensor, and from the detected value. 1. An article shelf device comprising a device that measures the total weight of articles on the shelf, and counts and displays the total number of articles based on the measured value and the standard weight of the articles.