JPS58823Y2 - belt scale - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a belt scale using a load cell.

In a conventional belt scale using a load cell, a carrier bed having a carrier roller serving as a weighing roller is connected to a stacking rod mechanism, and the load applied to the carrier roller is transmitted to the load cell via the stacking rod mechanism.

This has the disadvantage that the mechanism is complicated and large.

In view of the above points, the present invention uses a weighing mechanism in which a horizontal load cell is housed in a box-shaped structure in which the upper and lower parts of a fixed frame and a movable frame are connected by leaf springs. It is designed to be able to measure weight using a much simpler and more compact mechanism than the conventional one, and the details are as follows.

In the figure, A is a weighing mechanism.

In this mechanism, the rear ends of a pair of leaf springs 2 and 3 are fixed to the top and bottom of a fixed frame 1, the top and bottom of a movable frame 4 are fixed to the front ends of these leaf springs 2 and 3, and a load cell 5 is installed inside. be.

This load cell 5 is for detecting bending loads, and the load cell 5 is supported by a receiving piece 6 fixed to the fixed frame 1, and the pushing piece 7 fixed to the load frame 4 and the pressure receiving part 8 of the load cell 5 are connected by a connecting rod 9. It is connected.

However, in the examples shown in Figs. 1 and 2, the pair of left and right weighing mechanisms A
A carrier bed 1 in which a fixed frame 1 is fixed to the left and right conveyor frames 10, the movable frames 4 of the left and right weighing mechanisms A are opposed to each other, and a carrier roller 11 as a weighing roller is attached.
The movable frame 4 is fixed to both ends of the conveyor belt 13 so that the load of the conveyed objects on the conveyor belt 13 is transferred to the carrier roller 11. It is attached to the movable frame 4 via the carrier bed 12.

In addition, in the examples shown in FIGS. 3 and 4, there is only one weighing mechanism A, and its fixed frame 1 is fixed to the center of the conveyor frame 10, and the branch piece 14 protruding from the movable frame 4 is attached to the carrier bed. The load of the conveyed object on the belt 13 is fixed to the center bottom of the carrier roller 11. It is attached to the movable frame 4 via the carrier bed 12.

The present invention has the above configuration, and the load of the conveyed object is applied to the movable frame 4 in any of the above examples.

Therefore, the steel frame 4 is affected by the downward load caused by the transported object and by the leaf spring 2.
As the load cell 5 descends to the position where the elasticity of 3 is balanced, the load cell 5
A downward load acts on the pressure receiving part 8 of.

Therefore, a bending load from the transported object acts on the load cell 5, and an output voltage proportional to the load is sent to the display circuit, and the weight is displayed on the display section by the function of the circuit.

The present invention measures the weight of conveyed items without using a stacking rod as described above, and is smaller and lighter compared to a stacking rod mechanism, so it requires less space and does not require a friction part like a knife. Since there is no oxidation, there are various effects such as the ability to obtain stable characteristics over a long period of time.

[Brief explanation of the drawing]

Figure 1 is a front view showing the first embodiment of the device of the present invention;
The figure is an enlarged longitudinal sectional side view of the essential parts of the same, FIG. 3 is a front view of the second embodiment, and FIG. 4 is an enlarged side view of the same. 1... Fixed frame, 2, 3... Leaf spring, 4
...Movable frame, 5...Load cell, 10
...Conveyor frame, 11...Carrier roller, 12...Carrier bed, 13.
...Conveyor belt, A...Weighing mechanism.

Claims (1)

[Scope of utility model registration request] The rear ends of a pair of upper and lower leaf springs are fixed above and below the fixed frame, the upper and lower ends of the movable frame are fixed to the front ends of each leaf spring, and a load cell is installed between the fixed frame and the movable frame to measure the load applied to the movable frame. A belt scale characterized in that the fixed frame of the weighing mechanism which electrically detects the weight is fixed to a frame of a conveyor, and the movable frame is fixed to a carrier bed of the conveyor.