JPS5810121Y2 - indication scale - Google Patents

Description

[Detailed description of the invention] This invention relates to an improvement of the internal structure of an indicating scale.

As shown in FIG. 1, a conventional general indicator scale has a fulcrum hole 2 for a parallel lever 13 in the upper and lower positions of the rear part of a main body frame 1 formed separately from a cover 16, and the parallel lever 13 is inserted into the support hole 2. It is supported at a fulcrum position by a pin 2a, and the forwardly extending end of the parallel lever 13 is connected to the vertical lever 11 with a pin.

The vertical lever 11 is supported by the main body frame 1 via a measuring spring 12, and is configured to move downward in response to the load placed on a tray 5 provided at the upper end. 9. The pinion 10 is used to change the rotation, and the pointer 7 is used to indicate the weight on the scale plate 8.

The arm 11a, the rack 9, the pinion 10, the pointer 7,
The scale plate 8 is connected to the parallel lever 13 with respect to the vertical lever 11.
The bearing parts 4 and 14 of the shaft of the pinion 10 are provided in the position opposite to the main body frame 1 to which the scale plate 8 is attached.
is attached to the back of the

In such an indicating scale, if the positional relationship between the fulcrum position of the parallel lever 13 and the bearings 4 and 14 of the pinion 10 changes, the accuracy of the scale will be adversely affected, so the main body frame 1 must be formed strongly. Therefore, the frame 1 has a box-like or bar-like shape that almost corresponds to the cover 16 of a scale.

Apart from this, there is also the above-mentioned indicator scale in which the frame 1 and the cover 16 are formed integrally, but the internal parts arrangement is almost the same, so the cover doubles as the frame, so they are parallel to each other. This has the drawback that relative displacement between the fulcrum position of the lever and the pinion bearing is likely to occur, which is undesirable in terms of accuracy.

In view of the above, the present invention aims to provide an indicating scale having a structure in which the parts corresponding to the main body frame can be simplified so as not to adversely affect the accuracy of the scale.

This invention will be explained below based on an embodiment shown in FIG.

In the figure, reference numeral 20 denotes a parallel lever support metal fitting, which has parallel lever fulcrum protrusions 20a on the upper and lower sides, and bearing portions 21 and 22 for the shaft of the pinion 10 are provided at an intermediate position.

Reference numeral 23 denotes an exterior case, in which a scale plate 8 is attached to the front surface on the left side of the figure, and a parallel lever support metal fitting 2 is attached to the back side of the scale plate 8.
0 is attached with screws.

The parallel lever 13 therefore extends rearward from its fulcrum and is connected to the vertical lever 11.

The upper end of the metering spring 12 is supported by the outer case 23 via the zero point adjuster 6.

The rest of the structure is almost the same as the conventional one, and equivalent parts are designated by the same reference numerals.

In this indicator scale, the fulcrum of the parallel lever 13 is provided in the parallel lever support fitting 20, and the bearing portion 21.2 of the pinion 10 is located very close to the fulcrum and in the same fitting 20.
2, the structure is such that relative displacement between them is extremely difficult to occur.

Therefore, compared to the conventional indicating scale shown in FIG. 1 in terms of accuracy, it is not inferior at all, but is actually improved.

And, compared to the indicator scale of FIG. 1, what corresponds to the main body frame 1 is a very simplified parallel lever support fitting 20.

Therefore, parts manufacturing costs and assembly man-hours are significantly lower than in the past.

Furthermore, in FIG. 2, the right side inside the case 23 is in a state where there are no housing parts, and this internal structure allows a more compact indicating scale.

As described above, according to this invention, it is possible to provide an improved indicating scale that is less expensive than the conventional one, is comparable in size, and is comparable in accuracy.

[Brief explanation of the drawing]

FIG. 1 is a partially vertical side view showing an example of a conventional indicating scale, and FIG. 2 is a partially vertical side view showing an embodiment of this invention. 11...Vertical lever, 13...Parallel lever, 12...Measuring spring, 9...Rack, 10...Pinion, 7... ...Guidelines,
8... Scale plate, 2a... Parallel lever fulcrum pin, 20... Parallel lever fulcrum metal fitting, 21
．． 22...Bearing part of pinion shaft.

Claims (1)

[Scope of utility model registration request] In the above-mentioned indicator dial, a vertical lever to which a load is applied is supported by a parallel lever and a measuring spring, and a rack that follows the displacement of the vertical lever due to the load drives a pointer via a pinion and indicates the weight on a scale plate. An indicator pin, characterized in that a fulcrum metal fitting forming a fulcrum of the parallel lever is provided on the back side of the scale plate, and a bearing part for supporting the shaft of the pinion is formed integrally with the fulcrum metal fitting.