JPS6017322A - Weighing device - Google Patents

Abstract

PURPOSE:To protect a load cell from over load or vibration at the time of transportation and the force of action applied to a weighing scale in the horizontal or twisting direction at the normal use by setting up a member limiting the rise of a pedestal on the frame of the weighing device. CONSTITUTION:The center of an angle 7 on the frame 6 is screwed 20 and a lifting screw 8 having a flange 9 is inserted into the screwed hole to form a slot 14 on the pedestal 2. The lifting screw 8 is reversely rotated and the pedestal 2 is pushed up by the flange 9 and sandwiched between the flange 9 and a projected part 13. Even if a load is applied to the pedestal 2, i.e. a weighing scale 1, variation load is transmitted to the load cell 3 and the pedestal 2 can be safely protected. Even if rotational force of horizontal force is applied to the pedestal 2, a damage due to over load can be prevented within a gap between the slot 14 and the lifting screw 8.

Description

[Detailed Description of the Invention] The present invention relates to a measuring instrument using a load cell or the like.
The purpose is to protect load cells etc. during transportation.

Conventionally, in order to protect the delicate weighing and display parts when not in use, spring scales have been equipped with methods such as turning a handle from outside the device and pressing the mechanical part against an upper limit stopper using a toggle mechanism or the like to lock it. It is being Scales that use load cells do not have large displacements in their mechanical parts like spring scales, and are highly rigid (and have a high natural frequency), so it is generally not necessary to provide a locking mechanism. However, when transporting cargo to a long distance, a simple locking mechanism is required. Further, it is desirable that vibrations, impact loads, and overloads act not only in the vertical direction but also in the horizontal direction and torsional direction.

The present invention has been made from this viewpoint, and will be described below with reference to embodiments shown in the drawings. In FIG. 1, reference numeral 1 denotes a plate of a measuring instrument, 2 a pedestal for receiving the plate 1, 3 a load cell of the measuring instrument, 4 a case, 5 a substrate, and 6 a frame constituting the measuring instrument.

FIGS. 2 and 3 show detailed configurations of main parts. A U-shaped metal fitting 7 (referred to as an angle) is installed on the frame 6, a screw 20 is cut in the center of the angle 7, and a lifting screw 8 having a flange 9 is screwed into the screw 20.

On the other hand, a notch 14 (or a hole may be formed) is formed in the pedestal 2, and is fitted over the flange 9 of the lifting screw 8. In this case, the pedestal 2 is installed as close as possible to the lifting screw 8 so that it does not come into contact with it even if it is displaced by the load. In addition, the protrusion 13 of the angle γ is positioned close to the top surface of the pedestal 2 without contacting it, and the pedestal 2 is connected to the hole 13 formed in the case 4.
By rotating the lifting screw 8 using a screwdriver, the pedestal 2 is pushed up by the flange, and is clamped between the flange and the protrusion 13.

In this state, even if a load is applied to the pedestal 2, that is, the weighing pan 4, no variable load other than a slight displacement due to pushing up is transmitted to the load cell 3, so that it can be safely protected.

In order to release the lock, please turn the lifting screw 8 all the way (
Just screw it in until the gap is larger than the gap a).

In addition, 16 is a washer that smooths the contact between the flange 9 and the pedestal 2, 16 is a set screw that adjusts and fixes the position of the angle 7, and 10 is an overload stopper screw in normal use, which is screwed into the pedestal 2. It is fixed with a nut 11.

The gap a between the stopper screw 10 and the frame 6 is adjusted to a position slightly exceeding the listed price load.

With this configuration, as shown in FIG. 8, the pedestal 2 is subjected to rotational force as shown by arrow A and arrow B.

Even if a horizontal force such as C is applied, if two or more locking mechanisms are installed on opposite sides of the pedestal 2, the cut 1
4 and the lifting screw 8, damage caused by overload can be completely prevented.

In FIGS. 4 and 6, the angle 7 is modified as shown in 17, and the lifting screw 8 is screwed directly to the portion 21 of the frame 6.

In the case of the one shown in FIG. 4, there is no degree of freedom in adjusting the position of the screw 8, which may be inconvenient. FIGS. 6 and 7 show another embodiment in which all the drawbacks have been improved, in which two side walls of the angle 22 are combined with two notches 25 formed in the base 2, and the protrusion 2
3 regulates the upper limit. Further, the lifting screw 8 is located approximately at the center between the two points.

As is clear from the above description, according to the present invention, the entire load cell can be protected from overload and vibration during transportation of the weighing device and from horizontal and torsional forces applied to the weighing pan during normal use. It also has the feature that you can easily set and release the lock from outside the case.

[Brief explanation of the drawing]

FIG. 1 is a side view of a measuring instrument according to an embodiment of the present invention, and FIG.
The figure is a side view of the same main part, Figure 3 is a plan view of the same, Figures 4 and 6 are
The figures are side views and plan views of other embodiments, FIGS. 6 and 7.
The figures are a plan view and a side view of still another embodiment, and FIG. 8 is a schematic plan view of the same for showing the operation and effect. 2...Pedestal, 6...Frame, 8...
... Lifting screw, 9 ... Flange, 14 ...
...Cut. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 12 `` 2tD, ri 4 Figure 3 Figure 5 Figure 4 @ 6 ''' 2a Figure 7! 24 Figure 8

Claims (2)

[Claims] (1) A notch is provided in the pedestal that receives the weighing pan, and a lifting screw with a flange in the center is provided at the position of the notch, and a member having a protrusion that restricts the lifting of the pedestal is provided on the whole scale frame. Meter. (2) At least two sets of notches, lifting screws, and angles are installed on opposite sides surrounding the pedestal, and the notches and the lifting screws are combined in close proximity to each other. Meter.