JPH028178Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a spring suspension device for a Roberval type scale, particularly a household scale.

(Prior Art) As shown in FIGS. 3 and 4, a conventional spring suspension device has a square hole 20a formed approximately in the middle of a spring suspension frame 20 fixed to a frame 10, and a spring suspension 40 is inserted into this square hole 20a. After inserting and mounting the tip 40a, the main spring 50 is locked to the tip 40a, and then the zero adjustment knob 30 is screwed into the threaded portion 40b of the head of the spring suspension 40 to complete the assembly. It was normal.

(Problems to be Solved by the Invention) In the above conventional technology, as shown in FIGS. 3 and 4, the main spring 50 is
Because the spring is located within 0, the spring suspension is 40
If the main spring 50 is not assembled in the order in which the main spring 50 is engaged with the spring hanging frame 20 and then the spring hanging frame 20, it will be very difficult to assemble, for example, after the main spring 50 is engaged with the spring hanging frame 20, Spring hanging 4
It was impossible to lock 0, and the order of assembly was fixed.

(Means for Trying to Solve the Problems) In view of the above drawbacks, the tip 40 of the spring suspension 40
The spring suspension 40 can be easily hung on the spring suspension frame 20 even after the main spring 50 is locked to a, and the spring suspension 40 can be easily hung on the spring suspension frame 20 even if the assembly order is slightly changed or even after the frame 10 has been assembled. To provide an inexpensive scale that can be hung on a spring hanging frame 20, leading to improved productivity.

(Embodiment of the invention) An embodiment of the invention will be described below in detail with reference to the drawings.

In FIGS. 1 and 2 showing the present invention, 1 is a frame. This frame 1 has stays A and B.
One end (not shown below) is pivoted, and the other ends of the stays A and B are pivoted to a pan support frame (not shown below) on which the heavy object to be weighed is placed. ,
A main spring 5 is suspended between a spring suspension frame 2 fixed to the frame 1 via a spring suspension 4 to which a zero adjustment knob 3 is screwed (the main spring is placed approximately in the center of the frame). ), converting the weight loaded on the tray support frame into elongation of the main spring 5, and adjusting the amount of elongation of the main spring 5 (not shown below);
This is a so-called Roberval type scale that displays weight with a pointer (not shown below) on a scale plate (not shown below) via a pinion (not shown below).

In the above-mentioned scale, a spring hanging frame 2 fixed to a frame 1 has an opening 2b provided with a narrow groove 2a approximately in the middle thereof, and bent pieces 2c, 2c are provided on the sides thereof. On the other hand, the spring suspension 4 is a molded product made of resin material or a sawn member, and the head has a threaded part 4.
a, the middle part has a narrow neck part 4b, and the lower part has a shaft part 4.
d and an engagement hole 4c for engaging a main spring 5, which will be described later, are integrally formed. Here, the diameter d1 of the threaded part 4a is larger than the diameters d2 and d3 of the narrow groove 2a and the opening part 2b, and the diameter d4 of the neck part 4b is slightly smaller than the diameter d2 of the narrow groove 2a, and the neck part 4b passes through the narrow groove 2a. Moreover, the diameter of the shaft portion 4d is smaller than the diameter of the thread groove of the diameter d1 of the threaded portion 4a (so that the shaft portion 4d does not come into contact with the threaded portion 3b of the zero adjustment knob 3 during zero adjustment).

6 is a zero adjustment spring. This zero adjustment spring 6 can be fitted into the spring suspension 4.
The zero adjustment knob 3 has a threaded portion 3b inside the cylindrical portion 3a, and the diameter d5 of the cylindrical portion 3a corresponds to the spring suspension frame 2.
The diameter is slightly smaller than the length L1 between the bent pieces 2c and 2c.

5 is a main spring. The main spring 5 is a spring for weighing objects to be weighed, and its lower end is not shown, but it is engaged with a pan support frame pivoted to the other ends of the stays A and B mentioned above, and its upper end 5a is connected to a zero adjustment spring 6. is engaged with the engagement hole 4c of the spring hanger 4 mounted thereon, and is located in the middle of the frame 1.

(Function) Therefore, the spring suspension 4 is connected to the spring suspension frame 2.
To suspend the main spring 5, after attaching and assembling the peripheral parts of the frame 1 (spring suspension frame 2, stays A, B, tray support frame, rack, pinion, scale plate, etc.) to the frame 1, The neck 4b of the engaged spring suspension 4 is pulled up to the narrow groove 2a of the spring suspension frame 2, and the neck 4 is
b is passed through the narrow groove 2a and the threaded part 4a is inserted into the opening part 2b.
It will be hung on. After that, screw the zero adjustment knob 3 into the threaded part 4a of the head of the spring suspension 4, and tighten the cylindrical part 3.
a is positioned between the bent pieces 2c, 2c to prevent the spring suspension 4 from shifting. Further, during zero adjustment, by rotating the zero adjustment knob 3, the spring suspension 4 is pulled up, and the shaft portion 4d below the neck portion 4b is positioned and fitted into the opening 2b, thereby regulating the displacement of the spring suspension.

(Effect of the invention) After the zero adjustment spring 6 and main spring 5 are attached to the spring suspension 4 in this way, the spring suspension 4 can be hung from the spring suspension frame 2 very easily, and as mentioned at the beginning, It can be assembled in the conventional assembly order, is easy to assemble, leads to improved productivity, and is effective in providing an inexpensive scale.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of the main parts of the present invention. FIG. 2 is an assembled perspective view of the main parts of the present invention. FIG. 3 is an exploded perspective view of the main parts of the conventional system. FIG. 4 is an assembled perspective view of the main parts in the prior art. 1, 10...Frame (double-dashed line), 2, 20
...Spring hanging frame, 2a... Thin groove, 2b...
Opening part, 2c...Bent piece, 3, 30...Zero adjustment knob, 4,40...Spring suspension, 3b, 4
a, 40b...screw part, 4b...neck part, 4d...
Shaft part, 5, 50... Main spring.

Claims (1)

[Scope of utility model registration request] A spring-suspended head 4a is located approximately in the middle of one of the bent pieces 2c of the channel, which has bent pieces 2c on both sides and is formed into a substantially U-shape with an upwardly opening cross section.
The square hole and the neck portion 4b of the spring suspension pass through a square hole through which the spring suspension passes, and an opening portion 2b that is larger in diameter than the shaft portion 4d of the spring suspension on the flat surface and smaller than the diameter of the screw portion 4a of the head of the spring suspension. A spring hanging frame 2 connected by a narrow groove 2a is fixed to the frame 1, and a threaded part 4a with a diameter larger than that of the shaft part 4d is attached to the head part, and a screw part 4a with a small diameter is connected between the head part and the shaft part. The neck portion 4b is provided with an engagement hole 4c for locking the main spring 5 at the lower end to form a spring suspension 4,
A spring suspension neck 4b with a main spring 5 locked in the engagement hole 4c is suspended from the opening 2b, and the zero adjustment knob 3 is screwed into the threaded portion 4a so as to be located between the bent pieces 2c. A spring suspension device for a scale, characterized by: