JPH06115582A - Packing body for platform weighing machine - Google Patents

Abstract

PURPOSE:To eliminate the necessity to use a shock absorbing material and to enable introduction of mechanical power in a packing work by binding or packing a platform weighing machine by means of a binding band or a heat- shrinkable film. CONSTITUTION:Polypropylene binding bands 2, 2 are longitudinally bound around both ends of a product 1 by using a general-purpose binding machine, and the clamping force of 30kgf/cm<2> is applied in the loading direction of the product 1. Moreover the binding is added to the center thereof in the width direction by one binding band 2. A polyvinyl chloride heat-shrinkable film 3 is used, an overlapping portion is heat-sealed to pack the product 1, and then this heat- shrinkable film 3 is bonded to the product by heat shrinkage, and the clamping force of 20kgf/cm<2> is applied in the loading direction of the product 1. Like this, the clamping force of 20 to 50kgf/cm<2> is applied at least in the loading direction of the platform weighing machine 1. Therefore, the generation of jogging of an inner member during the transportation can be restrained as much as possible, so that the use of a shock absorbing material can be eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat and substantially box-shaped package for a platform, which is used for measuring luggage and weight.

[0002]

2. Description of the Related Art Conventionally, a flat and almost box-shaped package body used for measuring a body weight or the like has a block shape made of a synthetic resin foam in which the periphery of the platform scale is divided into two or more parts. It is made by tightly enclosing it with a cushioning material, which is designed to absorb external vibrations and shocks, and by packing one or more items protected by this cushioning material in a cardboard box that is an exterior material. ing.

[0003]

However, in the case of adopting the above-mentioned conventional packing form, the cushioning material made of synthetic resin foam becomes bulky so-called industrial waste after it is used, and therefore various treatments are required. I have a problem. On the other hand, since the cushioning material is bulky, it is not only expensive to store and transport the cushioning material itself and the package using the cushioning material, but it is almost manual to apply the cushioning material to the product. Therefore, there is a problem that the labor cost in the packaging process also increases.

By the way, as shown in FIG. 6, a platform scale usually has a structure in which a lower case, which is a substrate, and an upper case, which is a step, are connected by two springs via internal members.
At this time, the load applied by the spring in the load direction (the direction in which the load acts during use) is about 10 kgf / cm ² , and if the platform scale to which this load is applied is packed without any cushioning material, it will be in transit. However, if it is repeatedly vibrated in the load direction, the load transmission mechanism, which is a main internal member, in particular, wear and distortion due to the fine movement of the blade will occur, and the accuracy of the product will be affected. In addition, if repeated impacts are applied in the direction of the load even during transportation, misalignment will occur between the members of the load transmission mechanism, which also includes a lever and a blade, and the load transmission point will change. It causes a deviation in the accuracy of.

Therefore, when transporting a platform scale as a precision machine in an unstable state in the load direction, a cushioning material that is inevitably bulky in order to protect the product from repeated vibrations and impacts and to maintain its accuracy. Is used. As a result of intensive studies in view of the above-mentioned present situation, the inventors of the present invention can achieve the intended purpose without using a cushioning material if the packaging body has a reinforced load in the load direction of the platform scale. Based on this finding, the present invention has been completed.

That is, the present invention has been made for the purpose of solving the above-mentioned drawbacks of the prior art and providing a packaging body which does not require the use of a cushioning material and which can easily introduce a mechanical force into the packaging work. is there.

[0007]

According to the present invention, "a platform scale is bound or packaged with either a binding band or a heat-shrinkable film, and the binding force or heat shrinkage force at that time causes at least the load direction of the platform scale. 20 to 50 kgf / c
The gist of the package is a package of a platform scale characterized by being loaded with a tightening force of m ² .

That is, according to the present invention, by binding or wrapping the platform scale with a binding band or a heat-shrinkable film, a new tightening force is applied in addition to the stress of the original spring in at least the load direction, and repeated vibration or vibration is applied. Even if a shock is received, it is considered that there is no slight movement between members inside the machine,
Therefore, the purpose is to eliminate the use of a cushioning material.

The binding band used in the present invention is 20
Any conventionally known material that can obtain a tightening force of up to 50 kgf / cm ² can be used, and examples thereof include a polypropylene band. This binding band exerts a predetermined tightening force by adjusting the band tightening force of the binding machine.

As the heat-shrinkable film used in the present invention, a conventionally known heat-shrinkable film can be used as it is, and ethylene, propylene, acrylic ester, vinyl acetate, acrylamide, styrene, vinyl chloride or the like can be used alone. A film made of a polymer or a film made of two or more kinds of copolymers, which is provided with heat shrinkability by setting conditions during film formation and stretching after film formation, or two or more kinds selected from these. There is a laminated film composed of the above film.

Particularly, in the case of a film, since the tightening force due to heat shrinkage is used, it is preferable that the shrinking stress is large, but the shrinking stress corresponding to the tightening force of ^{20 to} 50 kgf / cm ² is mostly used. The heat shrink film has a component. Factors related to this shrinkage stress include the type of resin constituting the film, its heat shrinkage rate, elongation, etc.,
Select and use an appropriate one based on the shape, size, weight, etc. of the platform scale to be packaged. However, it is necessary to keep in mind that those having a large heat shrinkage may be inferior in heat sealability, and from this viewpoint, rather than a film made of a single polymer, a film made of a copolymer or a film made of a copolymer is used. In the case of a laminated film composed of two or more kinds of films, it is possible to obtain products which complement each other's defects, and therefore preferred.

In the present invention, the binding band and the heat-shrinkable film are used independently. And in the binding packing performed using the binding band, it may be bound by a general-purpose binding machine, and in the heat shrinkable packaging performed using the heat shrinkable film, a series of encapsulation of the film on the article to be packed, heating, etc. A shrink wrapping machine that can continuously perform the wrapping process of (3) using a conveyor can be adopted.

Further, if the tightening force by the binding band or the heat shrink film is too small, it is impossible to prevent the precision of the table scale, which is the object to be packed, from being disturbed by vibration and impact. 20 to 50 kgf / cm ² is preferable because accuracy cannot be maintained, packaging and packing take time, and the platform scale is damaged.

[0014]

The package of the platform scale of the present invention has a structure in which the platform scale is unstable in the load direction due to the characteristics of its function. Conventionally, a cushioning material has been used as a measure against vibration and shock during transportation. However, in the present invention, a stronger tightening force is applied in the load direction to suppress the occurrence of fine movement of internal members as much as possible, and a protective measure based on the new idea. As a result, it is not necessary to use a cushioning material.

Further, since the binding band and the heat shrink film are used, the bundling or wrapping process can be automated, and when the heat shrink film is used, the machine is tightly packed, so that dust or foreign matter is mixed. There is no such thing, and the machine error and rusting caused by these are eliminated.

[0016]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a view showing an embodiment of the present invention. In FIG. 1 (a), polypropylene binding bands 2 and 2 are bound near both ends in the longitudinal direction of a product 1 by using a general-purpose binding machine. , 30kgf / c in the product load direction
The tightening force of m ² is applied.

Further, FIG. 2B shows the binding mode shown in the above example, and further, a single binding band 2 is provided at the center in the width direction of the product.
The figure shows an example in which the binding by is added.
The same tying band and tying machine are used. Further, in FIG. 3C, a heat-shrinkable film 3 made of polyvinyl chloride is used to heat-seal the overlapped portion to wrap the product 1, and then the heat-shrinkable film 3 is heat-shrinked into a package. Close to 20kgf / c in the product load direction
The tightening force of m ² is applied.

Evaluation Test Results of the vibration test and the impact test of the package of the present invention shown in FIG. 1 (a) among the above examples are shown in Table 1 in comparison with the case of the conventional package. Further, FIG. 2 shows the results of the vibration test in a graph, and FIG. 3 also shows the results of the impact test in a graph. 4 is a graph showing the result of the vibration test in the above comparative example, and FIG. 5 is a graph showing the result of the impact test.

The vibration test is performed with an amplitude of 2 mm and 1 minute per minute.
A single vibration of 000 times was applied to each of the upper, lower, left, right, and front for 3 hours. In the impact test, the height of the base was naturally dropped from 80 cm to check whether the platform scale was out of order. At that time, one cardboard box made of a rectangular parallelepiped in which the product is packed has a total of 10 so that each of the six faces, one corner and each of the three ridges gathering at the corner are individually impacted. Dropped twice.

The table scales used in the above-mentioned examples and comparative examples have a product weight of 2.3 kg and a product size of 31.5 cm.
(Width) × 26.2 cm (depth) × 8 cm (thickness) was used. In addition, the packaging used for the above evaluation test is
Six pieces each of which was packaged individually in a cardboard box were bundled or shrink-wrapped, and each of them was further packed into one large cardboard box to prepare a test sample.

[0021]

[Table 1]

As is clear from Table 1 and FIGS. 2 to 5, it is clear that the influences (the degree of deviation from the reference value) are smaller in both the vibration and drop tests than in the comparative example.

[0023]

EFFECTS OF THE INVENTION The package of the platform scale of the present invention has a new idea of applying a tightening force in the load direction of the platform scale as a means for providing vibration resistance and impact resistance during transportation to suppress the occurrence of fine movement as much as possible. Since we originally took protective measures, we no longer need to use cushioning materials. Therefore, it is possible to reduce the cost of storing and transporting the material and the package by not using the cushioning material, and the material cost is only a fraction of that of the block-shaped cushioning material. Furthermore, the pollution property as industrial waste after use becomes extremely weak.

Further, since the binding band and the heat shrink film are used, the bundling or wrapping process can be automated, and when the heat shrink film is used, the machine is tightly packed, so that dust and foreign matter are not mixed. There is no such thing, and the machine error and rusting caused by these are eliminated. Therefore,
It is possible to speed up the packing process and reduce labor costs.
When using a heat shrink film, keep the product clean and
Maintaining accuracy becomes more reliable.

[Brief description of drawings]

1 shows an embodiment of the present invention, (a) is a perspective view showing an example in which a binding band is applied to a product and tightened, (b) is a perspective view showing another example of the same, and (c) is It is a perspective view showing an example in which a product was shrink-wrapped with a heat-shrinkable film and tightened.

FIG. 2 is a graph showing a result of a vibration test in the evaluation test of the package of the present invention shown in FIG.

FIG. 3 is a graph showing the results of an impact test of the evaluation tests described above.

FIG. 4 is a graph showing the results of a vibration test of the evaluation tests for the comparative example corresponding to the above.

FIG. 5 is a graph showing the results of an impact test of the evaluation tests described above.

FIG. 6 is a schematic view showing a structure of a platform scale.

[Explanation of symbols]

 1 scale 2 tie band 3 heat shrink film

Claims (1)

[Claims] 1. A platform scale is bound or packaged with either a binding band or a heat-shrinkable film, and the binding force or heat shrinkage force at that time tightens the platform scale at least in a load direction of 20 to 50 kgf / cm ² . A package of a platform scale characterized by being loaded with force.