JPH0336892Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention places an empty bag on a weight scale, drops grain into the empty bag from above, and measures the weight by electrically detecting the weight. The present invention relates to a grain supply weighing device, particularly to a weighing scale thereof, and further to a load cell attachment for a weighing scale that uses a load cell as a weight detector.

(Prior Art) This type of grain supply measuring device has a weight scale 2 disposed below a grain supply tank (hereinafter referred to as "tank") 1, as shown in FIG. A type is known in which an empty bag 3 is placed on top and grain is dropped from a tank 1 into the empty bag 3 to fill and weigh the empty bag. The above-mentioned weight scale 2 emits a signal from its weight detector, processes this signal electrically, and displays the weight on a weight display 4 or the like. In such a weighing scale, a load cell is sometimes used as a weight detector, but conventionally the load cell 5 is attached to the frame of the weighing scale 2 via a holding plate made of an iron plate. Electric charge was generated, which caused the operation to occur. Also, since it was attached only with a simple iron plate,
It takes time to position the center during installation,
This made installation difficult. Furthermore, in the past, no measures were taken to prevent twisting of load cells that are susceptible to twisting.

(Purpose of the present invention) The present invention was developed by focusing on the above-mentioned problems, and aims to simplify the installation by preventing static electricity caused by the potential difference in the electronic scale and by making it extremely easy to locate the center during installation. In addition, this type of grain feeding and measuring device is mainly used by farmers, but when using it, the top lid of the weighing scale is often tilted back and forth, left and right, and up and down when unloading the filling bag from the weighing scale. This is provided to achieve the purpose of protecting the load cell from the twisting phenomenon that occurs when the load cell is twisted.

(Structure of the present invention) In order to achieve the above object, in the present invention, an empty bag is placed on a weighing scale disposed below a grain supply tank, and grains are transferred from the grain tank to the empty bag. In a grain feeding and measuring device that performs quantitative metering by dropping and filling a fixed amount, the weighing scale has a load cell as a weight detector, and the load cell is held between a pair of upper and lower holding plates, and the upper surface of the upper holding plate is has a positioning protrusion that fits with the upper lid, and has a suspension plate on the lower surface that sandwiches the load cell from the left and right sides, and a protruding plate that sandwiches the load cell from the left and right sides on the upper surface of the lower holding plate, and a has a positioning protrusion that fits with the base frame body, and supports the load cell with a slight gap between the load cell and the plate in a state where the load cell is supported between the left and right suspension plates and the protruding plate, The entire upper and lower holding plates are made of synthetic resin.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

Note that the same parts as in the conventional example are given the same reference numerals.

In the present invention, an empty bag 3 is placed on a weight scale 2 disposed below a grain supply tank 1, and a predetermined amount of grain is dropped from the grain tank 1 into the empty bag 3 for quantitative measurement. In the supply measuring device, a load cell 5 is provided as a weight detector for the weighing scale 2, and the load cell 5 is held between a pair of upper and lower holding plates 6 and 7 via screws 8a and 8b. The upper surface 6a of the plate 6 has positioning protrusions 6b, 6b that fit into the positioning holes 2b, 2b drilled in the upper lid 2a of the weighing scale 2, and the lower surface 6c has suspension plates that sandwich the load cell 5 from the left and right sides. 6d, 6d, and the upper surface 7a of the lower holding plate 7 has projecting plates 7b, 7b that sandwich the load cell 5 from the left and right sides,
The lower surface 7c has positioning protrusions 7d, 7d that fit into positioning holes 2d, 2d drilled in the base frame 2c of the weight scale 2, and the load cell 5 is connected to the left and right suspension plates 6d, 6d and the protruding plate. 7b, 7b, both ends of the load cell 5 and the plate 6
The upper and lower holding plates 6, 7 are made of synthetic resin.

Reference numeral 1 denotes a grain supply tank in which grains for filling are stored, and a shutter 11 is provided at the outlet at the lower end of the tank. Shutter 11 above
is about to be closed.

Reference numeral 2 denotes a weighing scale on which an empty bag 3 is placed, and inside thereof there is a load cell 5 as a weight detector, and upper and lower holding plates 6, which support it.
It accommodates 7.

The upper and lower holding plates 6, 7 are in the shape of a hook and form a pair, and the load cell 5 is supported and accommodated in the pair of upper and lower holding plates 6, 7 as described below.

As shown in FIG. 1, the load cell 5 has a portion extending from both ends to the middle of the suspension plates 6d, 6d of the pair of retaining plates 6, 7 and the projecting plates 7b, 7.
It is fixed and supported via bolts or the like between the sections b.

When the load cell 5 is supported between the suspension plates 6d, 6d and the projecting plates 7b, 7b of the pair of retaining plates 6, 7, the distance between the suspension plates 6d, 6d and the projecting plates 7b, 7b and the end face of the load cell 5 is have a short distance d from each other. The gap d maintains a distance sufficient to prevent the pair of suspension plates 6d, 6d and the protruding plates 7b, 7b from coming into contact even if the load cell 5 is deformed during loading, and at the same time, the load cell 5
When a lateral torsional moment is applied to
The plates 6d, 6d, 7b, 7b must be narrow so as to protect them.

One of the pair of holding plates 6 and 7 is fixed to the base frame 2c of the weighing scale 2 with positioning holes 2d and 2d and positioning protrusions 7d and 7d fitted, and the other is an upper cover that receives the weight of the bag body 3. It is fixed at 2a.
That is, the load cell 5 is connected via the holding plates 6 and 7,
The load is applied to both ends. In the embodiment shown in FIGS. 1 and 2, the lower holding plate 7 is fixed to the base frame 2c, and the upper holding plate 6 is fixed to the upper lid 2a. As a result, when a load is applied, the load cell 21 receives a bending moment via the upper holding plate 7, causing the load cell 21 to flex as shown in FIG.

Further, 9 is an input port for inputting grains into this device, and 10
1 is a grain frying and sorting tube that incorporates a screw, a sorting net, etc. for sorting the grains by frying the grains to tank 1.

Next, the operation of the present invention having the above structure will be explained.

First, the empty bag 3 is placed on the scale 2, and after setting the amount of grain to be filled, the shutter 11 of the tank 1 is opened. Grain is dropped into bag 3 from shutter 11,
A load F acts on the weight scale 2, and the upper holding plate 6 also receives the load and transmits it to the load cell 5. Then, the amount detected by the load cell 5 is electrically processed, and when a predetermined filling amount is reached, the shutter 11 is closed to complete the filling. This weighing operation is repeated. In addition, the work of unloading the bags filled with the material to be filled (sometimes 30Kg and 60Kg) from the weighing scale is performed repeatedly.

(Effects of the present invention) In the present invention, when a load cell is incorporated into a weight scale, it can be reliably attached to a predetermined position using a positioning hole and a positioning protrusion, and since this mounting member is made of synthetic resin, static electricity is prevented. In addition, since the load cell is supported between the holding plates, it is possible to protect the load cell from torsional moments. Although it has such a simple structure, it has the great effect of eliminating malfunctions of weighing scales that are frequently used for weighing this kind of grain (for industrial use) and protecting the load cells.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of the load cell installation according to the present invention, FIG. 2 is an exploded longitudinal sectional view of the load cell installation according to the present invention, and FIG. 3 is an external perspective view of the grain filling and measuring device. 1... Grain supply tank, 2... Weight scale, 2a...
...Top lid, 2b, 2b...Positioning hole, 2c...Base frame, 2d, 2d...Positioning hole, 3...Empty bag,
4... Weight indicator, 5... Load cell, 6... Upper holding plate, 6b, 6b... Positioning protrusion, 6d, 6
d... Suspension plate, 7... Lower holding plate, 7b, 7b...
Projection plate, 7d, 7d...positioning protrusion.

Claims (1)

[Scope of Claim for Utility Model Registration] Grain supply in which an empty bag is placed on a weighing scale disposed below a grain supply tank, and a predetermined amount of grain is dropped from the grain tank into the empty bag for quantitative measurement. In the weighing device, the weighing scale meets the following conditions A,
A weighing scale for a grain feeding and measuring device, characterized by comprising B, C and D. (A) A load cell is provided as a weight detector, and the load cell is held between a pair of upper and lower holding plates. (B) The upper surface of the upper holding plate has a positioning protrusion that fits with the upper cover, and the lower surface has a suspension plate that sandwiches the load cell from the left and right, and the upper surface of the lower holding plate has a suspension plate that holds the load cell from the left and right. In addition to having a protruding plate, the lower surface has a positioning protrusion that fits into the base frame. (C) When the load cell is supported between the left and right suspension plates and the protruding plate, there is a slight gap between the load cell and the plate. (D) The entire upper and lower holding plates mentioned above shall be made of synthetic resin.