JPH0114895Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to scales, especially simple weighing scales that are always kept at home, and its purpose is to provide a scale that can improve the workability of span adjustment. .

Examples of the present invention will be described below in comparison with conventional examples.

Figures 1a, b, and c show the appearance of a conventional simple weight scale. Each weight scale is configured to read the weight scale of a built-in disc-shaped scale plate through a reading hole to which a lens frame 1 is attached. Reference numeral 2 denotes a zero point adjustment knob, which is arranged on the side surface of the step base 3 near the lens frame 1 as shown in FIG. There are some that are arranged on a side surface that is not the side surface near one. The structures of the internal mechanism parts in FIGS. 1a, b, and c are all the same, and depend on the mutual positional relationship between the step base 3 and the base plate 4, and the mutual positional relationship between the step base 3 and the base plate 4. base plate 4
The only difference is the mutual positional relationship between and the zero point of the disc-shaped scale plate.

FIG. 2 and FIG. 3 show typical internal mechanisms of a weight scale. 5a, 5b, 5c, 5d are point blades attached to the four corners of the back of the step base 3, 6a, 6b, 6
c and 6d are fulcrum blades attached to the four inner corners of the base plate 4 on the outside of the emphasis blades in correspondence with the four emphasis blades, 7 is the disc-shaped scale plate with a weight scale attached, and 8a and 8b are the One end is the fulcrum blade 6, respectively.
a first ram, 9a, supported by a, 6b;
Reference numeral 9b indicates a second lever whose one end is supported by fulcrum blades 6c and 6d, respectively; 10 indicates a second lever 9a;
A hanging ring whose other end 9b is suspended from the middle part of the first lever 8b, 8a, and 11 is a suspension ring which is suspended from the middle part of the first lever 8b, 8a.
a lever bracket 12 that connects the other ends of b; a lever 13 attached to the lever bracket 11;
14 is a frame attached to the base plate 4, and 14 is a spring that hangs the other end of the lever 12 from a support plate 15 attached to the frame 13. An adjuster 16 is inserted in a predetermined number of threads of the spring 14. The spring 14 is connected to the adjuster 16.
It is suspended from the support plate 15 by a suspension bolt 17 that engages with the suspension bolt 17 and the zero point adjustment dial 2 that is screwed into the suspension bolt 17. Reference numeral 18 denotes a link lever, and a rack 20 urged in the direction of arrow A by a spring 19 is connected to one end by a joint pin 21, and the other end is attached to the frame so that a protrusion 22 comes into contact with the upper surface 12a of the lever 12. 13 with a pin 23. Reference numeral 24 designates a pinion frame attached to the base plate 4, with the disk-shaped scale plate 7 attached to one end and the rack 20 attached to the other end.
A pinion shaft 25 formed with a pinion that meshes with the
is accommodated. 26 is a side spring interposed between the step base 3 and the base plate 4; 27;
2 is a hole for protruding the zero point adjustment knob 2; 28 is a hole for span adjustment used when turning the hanging bolt 17;
9 is a decorative board stuck on the step base 3.

The span adjustment of the weight scales shown in FIGS. 1a, b, and c assembled in this manner has conventionally been carried out as follows.

Arrange the scale so that the lens frame 1 is on the front side, place the reference weight on it, and insert a screwdriver through the span adjustment hole 28 through the lens frame 1 so that the weight scale on the scale plate 7 matches the weight of the reference weight. Insert it, turn the hanging bolt 17, and attach the support plate 15 and lever 1.
The number of threads of the spring 14 interposed between the spring 14 and the spring 14 is changed. At this time, in the case of FIGS. 1a and 1c, since the span adjustment hole 28 does not come to the front position, the span adjustment hole
It is necessary to reach the 8th position and work.
Generally, when adjusting the span of a scale, the adjustment is done by stacking several reference weights of about 20 kg on the step base 3, so the operator must extend his hand from the side of the reference weight to the span adjustment hole 28 position. This means that you are forced to work with

On the other hand, in the case of Fig. 1b, the span adjustment hole 28 is located at the front position, so there is no operational inconvenience when adjusting the span, but the zero point adjustment operation is difficult to perform under normal use. It has the serious drawback that it does not perform well. In other words, in the case of the scale shown in Fig. 1b, a user who attempts to step on the scale from the arrow B side as shown in Fig. 1 must reach the farthest side of the step base 3 to reach the zero point adjustment dial. 2 cannot be operated, and the rotation operation with the hand extended is extremely uncomfortable. In the former weighing scales shown in FIGS. 1a and 1c, such discomfort does not occur during zero point adjustment. Therefore, it is necessary to improve the workability of span adjustment of the weight scales shown in FIGS. 1a and 1c.

FIGS. 4 to 9 show embodiments of the present invention that can avoid the above-mentioned problems, and will be explained here by taking the scale of the type shown in FIG. 1c as an example.

4 and 5 show the scale in a fully assembled state, in which case the disc-shaped scale plate 7 is configured as shown in FIG. This differs from the conventional one in that an adjustment window 31 is provided in the vicinity of the use hole 28 in addition to the conventional reading window 30.

The disc-shaped scale plate 7 has a conventional weight scale 32 and a span adjustment scale 33 on the outside of the weight scale 32. The zero point positions of the weight scale 32 and the scale 33 differ by an angle θ, so that when the zero point of the weight scale 32 is at the pointer 1a position of the lens frame 1, the zero point of the scale 33 is located within the range of the adjustment window 31. It is configured. In FIG. 6, a virtual line 34 represents the field of view through the lens frame 1, and a virtual line 35 represents the field of view through the adjustment window 31. Also, adjustment window 3
1, as shown in FIG. 7a, a hole 3a having a notch 36 is bored on the step base 3, and a member 38 having a protrusion 37 that fits into the notch 36 is attached to the hole 3a. , the scale 33 may be read using a pointer 39 provided on the member 38 as a reference, or a hole 3a may be bored with a protrusion 40 left in place of the pointer 39 as shown in FIG. 7b. Furthermore, the seventh
In the case of FIG. a, the member 38 is removed from the hole 3a upon completion of the span adjustment, and the decorative board 29 is pasted onto the step base 3.

With this structure, when adjusting the span, as shown in FIGS. 8 and 9, the plates 41, 41 are placed on the step base 3, and the necessary number of reference weights 42 are stacked thereon. At this time, the weight scale is arranged so that the zero point adjustment dial 2 is located at the front. Then, as shown by the broken line, the adjustment window 3
1 to the scale 33, and if the displayed weight is different, insert the driver 43 into the span adjustment hole 28 and turn the hanging bolt 17 to adjust the displayed weight as in the conventional case. Therefore, it is not necessary to arrange the scale so that the lens frame 1 is on the front side and to reach the position of the span adjustment hole 28 and work in an unreasonable posture, as shown by the broken line in the conventional method. It is something.

As explained above, according to the present invention, the scale adjustment process, which is said to have poor span adjustment workability, can be improved by simplifying the structure, and is superior in both productivity and operability in normal use. It can provide a scale.

[Brief explanation of the drawing]

Figures 1a, b, and c are external perspective views of a conventional simple weight scale, Figure 2 is an internal perspective view of the conventional scale, Figure 3 is a cross-sectional view of the main parts, and Figures 4 to 9 are of the present invention. 4 and 5 are a plan view and a cutaway side view of the main parts in the assembled state, FIG. 6 is an explanatory diagram of the positional relationship between the disc-shaped scale plate and various holes, and FIG. 7 is an illustration of the embodiment. a and b are perspective views of the adjustment window, and FIGS. 8 and 9 are a plan view and a side view of the span adjustment state. DESCRIPTION OF SYMBOLS 1... Lens frame, 2... Zero point adjustment dial, 3... Step base, 7... Disc-shaped scale plate, 14... Spring, 28... Span adjustment hole, 29... Decorative board, 30
...Reading window, 31...Adjustment window, 32...Weight scale,
33...Adjustment scale.

Claims (1)

[Scope of utility model registration request] In a scale configured to read the weight scale of a disc-shaped scale plate through a reading window drilled in a step base, the zero point position outside the weight scale of the disc-shaped scale plate is adjusted to be different from the weight scale by a predetermined angle. A window for reading the adjustment scale is provided on the step base at a position near the span adjustment hole in addition to the reading window, and the window for reading the adjustment scale is provided when there is no load on the step base. A scale characterized in that the zero point of the adjustment scale is located within the range of .