JPH0222654Y2 - - Google Patents

Description

[Detailed explanation of the idea] <Industrial application field> The present invention relates to a shock absorber balance.

<Prior art> In order to prevent the shock load from being directly transmitted to the weighing mechanism of the balance when a load to be weighed is applied to the balance, the weighing pan 1 is usually made of neoprene or the like as shown in the first and second diagrams. It is placed on a tray holder 2 via a plurality of shock absorbers 3. In FIG. 1, the weighing pan 1 is shown with no upper part in order to clearly show the part of the shock absorber. FIG. 2 is a sectional view showing the relationship among the weighing pan 1, the shock absorber 3, and the pan holder.

<Problem to be solved by the invention> However, in the structure of such a shock absorption mechanism, the shock absorber is fully compressed every time a shock load is applied, until it generates a stress corresponding to the magnitude of the shock load. Even after this condition is reached, the entire static load of the object to be weighed will always be applied to the shock absorber, regardless of its magnitude, so that the shock absorber will eventually undergo permanent deformation, lose its elasticity, and become shock absorber. The absorption function will no longer be exerted.

An object of the present invention is to eliminate the above-mentioned drawbacks associated with the prior art and to provide a balance with a shock absorbing device that does not permanently lose its shock absorbing function.

<Means for Solving the Problems> In order to achieve the above object, in the present invention, a plurality of shock absorbers interposed between the weighing pan and the weighing pan holder each have a columnar shape of a predetermined length, and A recessed hole is provided in at least one of the lower surface of the weighing pan and the upper surface of the weighing pan holder to accommodate a portion of the shock absorber in the length direction, and the shock absorber is disposed in each of the recessed holes. , the depth of each shock absorber is greater than its length at its elastic limit.

<Function> The shock load when a weight to be weighed is applied to the weighing pan is absorbed by the elastic force that compresses the columnar shock absorber in its longitudinal direction. At this time, if an excessive load that compresses the shock absorber below the depth of the hollow hole is applied to the weighing pan, the bottom surface of the weighing pan will come into contact with the top surface of the weighing pan holder.
The maximum amount of compression of the shock absorber is regulated by the depth dimension of the recess, so that each shock absorber is not compressed beyond its elastic limit length. That is, no stress exceeding the elastic limit is applied to each shock absorber, and no permanent deformation or elastic deterioration occurs.

<Example> An example of the present invention will be described below based on FIG. 3. FIG. 3 shows, as a sectional view, the structure of the shock absorbing mechanism portion of the balance with a shock absorbing device according to this embodiment.

In the figure, the shock absorber 3 has a length in the vertical direction relative to its cross-sectional area that is sufficiently longer than that of conventional shock absorbers, and part of that length (height) is attached to the tray holder 2. It is installed by "sinking" into the recessed hole 4 provided. Dish holder 2
The cross section of the hollow hole 4 is set to be sufficiently larger than the cross section of the shock absorber 3 in consideration of the horizontal bulge due to the vertical compression of the shock absorber.

The depth of the hollow hole 4 is such that the deformation of the shock absorber 3 is within its elastic limit. That is, the depth of the hollow hole 4 is larger than the length of the shock absorber 3 in a state in which it is compressed under stress at its elastic limit.

In the structure of the shock absorbing mechanism as described above, since the shock absorber 3 is formed longer than the conventional shock absorber, not only can a sufficient amount of compression be obtained to accept a large shock load, but also
Since the shock absorber 3 is provided in the recessed hole 4, if the amount of compression exceeds a predetermined length, the lower surface of the weighing pan 1 will come into direct contact with the upper surface 5 of the pan holder 2, and the shock absorber Compression is prevented. Hole 4
Since the depth of the shock absorber 3 is deeper than the length when the stress at the elastic limit is applied, even if the shock absorber 3 is compressed to the maximum, it will be compressed beyond the length at the elastic limit. Never.
Therefore, even when subjected to excessive loads, the shock absorber 3 will not be deformed beyond its limit and its elasticity will not deteriorate, and the deformation of the shock absorber due to static loads will be prevented by the weighing pan 1 and the saucer holder 2. After the direct contact, the deterioration of the elasticity of the shock absorber 3 over time is prevented.

The present invention can also be implemented by providing a recess 5 on the lower surface of the weighing pan 1, corresponding to the recess 4 provided in the pan holder 2, as shown in FIG.

<Effects of the Invention> As explained above, according to the present invention, the shock absorber is formed into a columnar shape, the shock absorber is disposed in a recess provided in a weighing pan or a weighing pan holder, and Since the depth of the hollow hole is set to be deeper than the length at the elastic limit of the shock absorber, even if an excessive impact load is applied to the weighing pan, the shock absorber will not be compressed beyond its elastic limit. There is no permanent deformation or loss of elasticity of the shock absorber, and its functionality is guaranteed semi-permanently.

In addition, in the balance with a shock absorber according to the present invention,
Even when the weighing pan and pan holder are fixed to each other with a string or band for a long period of time for transportation or storage, the deformation of the shock absorber can be kept within the "elastic limit" by direct contact between the two. Therefore, the buffer mechanism will not deteriorate.

[Brief explanation of the drawing]

FIG. 1 and FIG. 2 are diagrams showing the structure of a buffer mechanism according to the prior art. FIG. 3 is a block diagram of a buffer mechanism according to an embodiment of the present invention, and FIG. 4 is a block diagram of a buffer mechanism according to another embodiment of the present invention. 1... Weighing pan, 2... Dish holder, 3... Shock absorber, 4, 6... Recessed hole.

Claims (1)

[Scope of utility model registration request] A balance in which shock load transmission to a load weighing mechanism is alleviated by supporting a weighing pan on a weighing pan holder via a plurality of shock absorbers made of elastic bodies, and the above-mentioned shock absorber is provided. The body has a columnar shape with a predetermined length, and a hollow hole is provided in at least one of the lower surface of the weighing pan and the upper surface of the weighing pan holder to accommodate a portion of the shock absorber in the length direction. The shock absorber is disposed in the shock absorber, and each recess has a depth sufficient to accommodate the length of each shock absorber at its elastic limit. Balance with device.