JP3660429B2 - Flat scale - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a spring for mounting a platform and a base of a flat scale and a structure of its mounting bracket.
[0002]
[Prior art]
Conventionally, a structure shown in the plan view of FIG. 3 is well known as a flat scale. In this figure, when a load is applied to a platform (not shown), the load is transmitted to the two main levers 3 and the two auxiliary levers 4 via four fixed feet and a weighting blade 5 (not shown). Each lever performs an arc motion around the fulcrum 2. Accordingly, a measuring spring (not shown) attached to the tip of the main lever 3 extends and balances, and at the same time, the scale plate 8 fixed to the pinion 6 via the link mechanism, the rack 7 and the pinion 6 receives the load. Rotates proportionally and a load value is indicated. Such a weighing platform and the base 1 are generally attached and held by two coil springs 9. A state where the coil spring 9 is attached is shown in FIG. 4A, and a state before the attachment is shown in FIG. 4B. In this figure, one hook portion of the coil spring 9 is hooked on the coil spring mounting portion 11 integrated with the mounting base 10 side, and the other coil spring is moved by the hooking tool 13 with the mounting base 10 side down. The hook portion is lifted and hooked into the two holes 12 provided in the base 1. However, there are many problems that the coil spring has fallen, and that the assembly work is difficult and the thickness is relatively thick while being flat.
[0003]
Therefore, what has been devised to solve this problem is disclosed in Japanese Utility Model Publication No. 56-4180. This device solves the problem that the conventional coil spring collapses and is difficult to be hooked with an installation tool as described above. One of the coil springs is not hook-shaped and a diameter portion larger than the coil spring diameter is provided at the end. The coil spring is prevented from falling by fixing the large-diameter portion with a locking piece provided on the coil. The other end is a hook part having the same shape as that described above, and the hook part is hooked to two holes provided in the hook base with an attachment tool, as in the above-described conventional example. However, there still remains a problem that the shape of the coil spring is difficult to process and the thickness cannot be solved.
[0004]
Further, a construction devised without using the above-described coil spring is disclosed in Japanese Utility Model Publication No. 56-4179. This device is fixed by, for example, caulking one end of a leaf spring to the left or right or front and back of the base, and a square hole is provided at the other end of the leaf spring. The locking piece is pushed with a jig. However, this structure also requires a plate spring to be drilled in three places with a mold or the like, and requires caulking work on the base, and there is a problem in measuring accuracy.
[0005]
[Problems to be solved by the invention]
As described above, with the coil spring having hook portions at both ends, it is difficult to raise the coil spring that is tilted even if an attachment tool is used and to attach it to the base. Even with a coil spring having a hook portion only on one side, the coil spring However, even in the structure using a leaf spring with a hole, it takes time to work and attach the leaf spring. Therefore, the present invention uses two wire-working springs that only bend the wire, and a simple mounting tool can be used for each of the protrusions, the base metal, and the protrusions that are simultaneously processed when the platform and the base are pressed. It is an object of the present invention to provide a thin flat weight scale that can be securely held by the mounting base and the base so that the mounting base and the base can be easily attached by simply pressing the wirework spring.
[0006]
[Means for solving problems]
According to the present invention, two protrusions are provided integrally with the base on both sides of the base with an interval toward the inside, and two detachment prevention metal pads are formed integrally with the base on the inside as described above. The mounting base is provided integrally with the mounting base at a position corresponding to the center of the wire for preventing slippage from the base protrusion, while the both ends of the wire are bent and the central protrusion is formed at the center. Install and temper the wirework spring, hook the both ends of the wirework spring into the base protrusion, push the mounting tool against the center protrusion of the wirework spring, and push it down. By hooking the protrusions of the wirework springs on the protrusions of the base, the tension is applied between the mounting base and the base so that the protrusions are attached.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
By hooking on the protrusions on both sides of the base side of the two bent portions of the tempered two wirework springs, by hooking the center protrusion of this wirework spring with the mounting tool, The above-mentioned wirework spring allows attachment between the mounting base and the base with a constant tension. In addition, when the both-ends bending part of the said wirework spring is hooked on the protrusion part of the base, the wirework spring is prevented from coming off by the detachment prevention metal provided on the base side. Accordingly, it is possible to realize a relatively thin flat weight scale that can securely hold the platform and the base and can be easily assembled.
[0008]
【Example】
An embodiment of the present invention is shown in FIGS. FIG. 1A is an overall plan view with the mounting base removed, and FIG. 1B is a diagram showing a state in which the wirework spring, which is a main part of the present invention, is attached to the mounting base and the base, and shows a perspective view of the protrusions, etc. ing. FIG. 2 is a perspective view of a part of the projection before the wirework spring is attached to the mounting table. In these drawings, the base 1, the fulcrum 2, the main lever 3, the auxiliary lever 4, the priority blade 5, the pinion 6, the rack 7, the scale plate 8, and the mounting table 10 are the same as those described in the conventional example, and their functions are also the same. Explanation is omitted for the same reason. Reference numeral 14 denotes a wire-working spring in which, for example, a wire rod of 1 mmφ to 2 mmφ is formed by pressing a projection 14a at the center and a bent portion 14b at both ends with a press or the like as shown in the drawing and tempered to give a spring effect. Reference numerals 1a and 1b denote protrusions for catching both ends of the detachment prevention metal pad and the wirework spring, which are processed simultaneously when the base 1 is pressed, and 10a is processed simultaneously when the mounting table 10 is pressed. It is a protrusion that is hooked by the central protrusion 14a of the wirework spring. These wirework springs and their hooking projections are provided on both sides of the base 1 and the mount 10 as shown in the figure. Therefore, when attaching them, first, as shown in FIG. 1A, the main lever 3 and the measuring mechanism are assembled, and then the two bent portions 14b of the wirework spring 14 as shown in FIG. After being hooked on 1b, as shown in FIG. 2, the notch 15a of the mounting tool 15 is placed on the base 10 with the notch 15a on the base as shown in FIG. By pressing in the direction, it is easily attached to the protrusion 10a of the mounting base 10, and the mounting base 10 and the base 1 are attached as a unit. The base 1a provided on the base 1 prevents the bent portion 14b of the wirework spring from being detached from the protrusion 1b of the base when the wirework spring 14 is attached to the base 1. Further, the protrusion 14a of the wirework spring 14 can be pulled from a hole when the protrusion of the mounting base is formed with a tool different from the above-mentioned mounting tool and hooked on the protrusion of the above-mentioned table.
[0009]
【The invention's effect】
The wire rod can be easily bent and tempered with a press to create a wire work spring. On the other hand, when pressing the mounting base and the base, protrusions etc. can be formed in the internal direction in a simple process, and assembled. In this case, the above-described wire-working spring can be attached to the mounting base and the base with a simple attachment tool. Further, since a slip prevention metal plate is provided on the base side, it is possible to prevent the base spring from being detached from the base projection part during the assembly of the wire work spring. Therefore, it can be manufactured at low cost, and it can be securely held without being lifted or lifted from the base when in use. There is an effect.
[Brief description of the drawings]
FIG. 1 is an overall plan view A from which a mounting table according to an embodiment of the present invention is removed, and a front view showing a state in which a wirework spring, which is a main part, is attached to the mounting table and the base. FIG.
FIG. 2 is a front view showing a state before the main part of the wire-working spring according to the embodiment of the present invention is attached to the mounting table, and is a perspective view of only the protruding portion of the mounting table.
FIG. 3 is an overall plan view with a platform removed from a conventional flat scale.
FIG. 4A is a view showing a state where a coil spring used in a conventional flat weight scale is attached to a mounting base and a base, and FIG. 4B is a view showing a state before the coil spring is attached to the base.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Base 1a Latch prevention metal 1b Base protrusion 1c Base hole 9 Coil spring 10 Mounting base 10a Mounting protrusion 11 Coil spring mounting part 12 Base hole 13 Hook tool 14 Wirework spring 14a Wirework spring Center protrusion 14b Folded ends 15 of wirework spring Mounting tool 15a Notch of mounting tool

Claims (2)

Two protrusions spaced apart in the inner direction on both sides of the base, and a slip-preventing metal pad in the inner direction of the gap are provided integrally with the base, and are provided on the base in the inner direction on both sides of the mounting base. A protrusion is provided integrally with the mounting base at a position corresponding to the substantially center of the two protrusions, while a bent portion is provided at both ends of the wire, and a protrusion is provided at the center to form a wirework spring. The bent part of this wirework spring was hooked on the part, and the protrusion part of the wirework spring was hooked on the protrusion part of the above-mentioned table, and the tension was applied between the mounting base and the base. Features a flat scale. A hole provided in the approximate center of the two protrusions provided on both sides of the base, and through the mounting tool through the attachment tool, pushed into the central protrusion of the wirework spring, and hooked on the protrusion of the mounting table. The flat weight scale according to claim 1, wherein a base is attached.

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