JPH0543030U - Load cell scale - Google Patents

Abstract

(57) [Summary] [Purpose] In a load cell balance in which a saucer is connected to the movable tip of a load cell whose base end is fixed to the main body housing, mounting a stopper mechanism to prevent the tip of the load cell from rising excessively. And no need to remove. [Structure] A stopper mechanism 25 facing the upper surface of a movable tip portion 18 of a load cell 17 is provided on a lower surface of a top plate of a main body housing 15 so as to project therefrom.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a load cell balance in which a saucer is connected to a movable distal end portion of a load cell whose base end portion is fixed to a main body housing.

[0002]

[Prior Art]

 Currently, a load cell balance that calculates the weight of an article as electrical data is in practical use. This load cell scale is a load cell in which the base end is connected to the tip of a load cell fixed to the main body housing, and the strain generated in the load cell by the weight of the articles loaded on the pan is electrically measured. It is designed to weigh.

Therefore, a conventional example of such a load cell balance will be described below with reference to FIGS. 3 and 4. First, in this load cell balance 1, as shown in FIG. 3, a rectangular flat plate-like support is provided on a movable distal end portion 5 of a load cell 4 having a base end portion 3 fixed on a rectangular flat plate-like main body base 2. The frame 6 is fixed, and the tray 8 is supported on cushioning rubbers 7 attached to the four corners of the upper surface of the support frame 6. In this load cell balance 1, support legs 9 composed of knurled bolts are attached to the four corners of the bottom surface of the main body base 2, and a main body box 10 having an open bottom surface is mounted on the main body base 2. The main body housing 11 is formed by. Further, in this load cell balance 1, four strain gauges (not shown) connected in a bridge are attached to the strain generating portion of the load cell 4, and these strain gauges are operated by an arithmetic circuit (not shown). )It is connected to the.

In such a configuration, in the load cell scale 1, when the load cell 4 is distorted corresponding to the weight of the weighing object (not shown) loaded on the tray 8, the operation circuit causes the weighing circuit to operate from the distortion. The weight is electronically calculated and used for display on a display (not shown) or printing on a label printer (not shown).

Here, in the load cell balance 1 as described above, the movable tip portion 5 of the load cell 4 rises when the tray 8 is pulled up during transportation or the like, but the displacement at this time is excessive. If so, the load cell 4, which is a precision measuring instrument, may be plastically deformed and may not be weighed. Therefore, in order to prevent the functional breakdown of the load cell scale 1 during such transport, as shown in FIG. 4, screw holes are formed in advance on the lower surface of the movable tip 5 of the load cell 4 and the main body base 2, respectively. And a through hole (both not shown) are coaxially formed, and a cylindrical spacer 12 made of a rubber material or the like is inserted between the lower surface of the tip portion 5 of the load cell 4 and the upper surface of the main body base 2. In this state, the main body base 2, the spacer 12, and the load cell 4 are fastened with bolts and nuts 13. By doing so, the movable tip portion 5 of the load cell 4 is fixed to the main body base 2, so that when the load cell balance 1 is shipped, the tip portion 5 of the load cell 4 is excessively displaced and measurement becomes impossible. Is prevented.

It should be noted that the spacer 12 and the bolt nut 13 as described above will be removed before use when the transportation of the load cell balance 1 is completed.

[0007]

[Problems to be solved by the device]

 In the load cell balance 1 described above, the movable tip portion 5 of the load cell 4 is fixed to the main body base 2 by the spacer 12 and the bolt nut 13 to prevent the functional breakdown of the load cell 4 due to the excessive displacement of the tip portion 5. It is supposed to do.

However, in this case, it is necessary to mount the spacer 12 and the bolt nut 13 before shipping the load cell balance 1 and remove the spacer 12 and the bolt nut 13 before using the load cell balance 1 which has been transported. However, the work of mounting and removing these members 12 and 13 is complicated and the productivity is hindered.

In addition, in some cases, the tray 8 of the load cell balance 1 which is actually used after transportation is pulled up and the load cell 4 is destroyed. Therefore, even when the load cell balance 1 is usable, the load cell balance 1 can be destroyed. It is desired to prevent excessive displacement of the tip 5 of No. 4 of FIG.

[0010]

[Means for Solving the Problems]

 In a load cell balance in which a saucer is connected to the movable tip of a load cell whose base end is fixed to the main body housing, and the saucer is placed on the top plate of the main body housing and the load cell is placed under the top plate. A stopper mechanism facing the upper surface of the movable tip of the load cell is provided on the lower surface of the top plate of the main body housing.

[0011]

[Action]

 Since the upper limit of the movable area of the movable tip of the load cell is regulated by the stopper mechanism, it is possible to prevent the tip of the load cell from excessively displacing and becoming unable to weigh during transportation or use. Even if the movable area of the tip of the load cell is restricted by such a stopper mechanism, weighing work can be performed, so there is no need for the complicated work of mounting this stopper mechanism at the time of shipment and removing it before use. It can also contribute to the improvement of the productivity of the load cell balance.

[0012]

【Example】

 An embodiment of the present invention will be described with reference to FIGS. First, in this load cell balance 14, the support frame 6 is fixed to the movable tip portion 18 of the load cell 17 whose base end portion 16 is fixed to the lower surface of the top plate of the main body housing 15 whose lower surface is opened. The tray 8 is supported on cushioning rubbers 7 attached to the four corners of the upper surface of the frame 6. In the load cell scale 14, the bolts 19 and 20 which are screw bodies screwed into the four corners and the central portion of the support frame 6 and the protrusions 21 and 22 which are provided on the upper surface of the top plate of the main body housing 15 are provided. A four-corner stopper 23 and a load cell stopper 24 are provided by facing each other.

In the load cell balance 14, the upper limit stopper 25, which is a stopper mechanism provided on the lower surface of the top plate of the main body housing 15, is provided close to the upper surface of the movable tip portion 18 of the load cell 17. Facing each other.

In the load cell balance 14, the tip portion 18 of the load cell 17 and the support frame 6 are connected to each other through a through hole formed in the top plate of the main body housing 15. Further, four strain gauges (not shown) bridged to each other are attached to the strain generating portion of the load cell 17, and these strain gauges are connected to an arithmetic circuit (not shown).

In such a configuration, in the load cell scale 14, when the load cell 17 is distorted corresponding to the weight of the weighing object (not shown) loaded on the pan 8, the operation circuit causes the operation circuit to measure the distortion. The weight is electronically calculated and used for display on a display (not shown) or printing on a label printer (not shown).

In the load cell balance 14, the upper limit of the movable area of the movable tip portion 18 of the load cell 17 is regulated by the upper limit stopper 25, so that the tray 8 can be pulled up during transportation or the like. It is prevented that the tip portion 18 of the load cell 17 is excessively displaced and cannot be weighed. Moreover, in the load cell balance 14, since the weighing operation can be performed in a state where the movable region of the tip portion 18 of the load cell 17 is restricted by the upper limit stopper 25 as described above, the upper limit stopper 25 is attached at the time of shipment. The productivity is good because it does not require the complicated work of removing it before use, and the durability is also good because the load cell 17 will not be damaged even if the pan 8 is pulled up during use. is there.

Further, in the load cell balance 14, in order to prevent the receiving tray 8 from colliding with the main body housing 15 due to the bending of the support frame 6 due to an unbalanced load, the bolt 19 and the protrusion 21 of the four-corner stopper 23 are brought into contact with each other. Partial lowering of the pan 8 is regulated below a certain value. Further, if the load applied to the tray 8 is uniform at the four corners but is too large, the strain amount of the load cell 17 exceeds the limit and plastic deformation occurs. Therefore, in order to prevent this, the bolt 20 and the protrusion 22 of the load cell stopper 24 are prevented. By contacting with, the lowering of the tip portion 18 of the load cell 17 is regulated to a certain value or less. Since the stoppers 23 and 24 have different purposes as described above, for example, the distance between the bolt 19 and the protrusion 21 of the four-corner stopper 23 is on the order of millimeters, while the bolt 20 and the protrusion 22 of the load cell stopper 24 are different from each other. The interval is on the order of microns, and when a uniform and excessive load is applied to the pan 8, the load cell stopper 24 acts before the four corner stoppers 23 act. Moreover, in the load cell scale 14, when the intervals between the components of the stoppers 23 and 24 are adjusted in order to ensure the good function thereof, the pan 8 is removed from the support frame 6 and the bolts 19 and 20 are operated. Since it suffices to rotate the parts 19a and 20a from above to adjust the distance between the parts 19a and 20a and the projections 21 and 22, this adjustment work is extremely easy and the productivity and maintainability are good.

[0018]

[Effect of the device]

 According to the present invention, as described above, the saucer is connected to the movable tip of the load cell whose base end is fixed to the body housing, and the saucer is arranged on the top plate of the body housing and the load cell is placed in the ceiling. In the load cell scale placed under the plate, a stopper mechanism that opposes the upper surface of the movable tip of the load cell is provided on the lower surface of the top plate of the main body housing so that the movable tip of the load cell can move. Since the upper limit of the area is regulated by the stopper mechanism, it is possible to prevent the tip of the load cell from excessively displacing and becoming unable to weigh during transportation or use, and such a stopper mechanism prevents the load cell from moving. Since weighing work can be performed even when the movable area of the tip is restricted, complicated work such as mounting this stopper mechanism at the time of shipment and removing it before use is required. It is no, those having the effect of such to improve the productivity of the load cell balance can contribute.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of the present invention.

FIG. 2 is a plan view.

FIG. 3 is a vertical sectional side view showing a conventional example.

FIG. 4 is a vertical cross-sectional side view with a spacer and bolts and nuts for transportation attached.

[Explanation of symbols]

 8 saucer 14 load cell balance 15 main body housing 16 base end 17 load cell 18 tip end 25 stopper mechanism

Claims (1)

[Scope of utility model registration request] 1. A saucer is connected to a movable tip of a load cell whose base end is fixed to a main body housing, and the saucer is arranged on a top plate of the main body housing and the load cell is arranged under the top plate. In the load cell balance described above, a stopper mechanism facing the upper surface of the movable tip of the load cell is provided on the lower surface of the top plate of the main body housing so as to project.