JP2012173035A - Weighing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To propose a weighing apparatus in which influences of bedewing on a load converter can be prevented in a structure where a housing is sealed at a waterproof level by a stainless cover member.SOLUTION: A digital balance 1 includes a load cell 40 which converts a load applied from an article into an electric signal, a tray holder 31 which supports a weighing tray 2 in which the article is placed, and applies the load of the article to the load cell 40, a housing 4 which has bottom plates 5 formed from insulation members and stainless cover members 6 covering the load cell 40, a portion of the tray holder 31 closer to the load cell 40 and electrical equipment in such a manner as to pass the tray holder 31 through, and which is sealed at a predetermined waterproof level by sealing between the cover member 6 and the tray holder 31 in such a manner as to vertically move the tray holder 31, and a heat insulating cover 13 which is erected on the bottom plate 5 so as to cover the load cell 40 inside the housing 4.

Description

  The present invention relates to a weighing device that includes a load converter that converts a load applied from an article into an electric signal and measures the weight of the article using the electric signal.

  Various types of techniques are known as weighing techniques for scales. As a weighing technique often used in recent years, a load cell type weighing technique using a strain gauge type load cell can be cited. This strain gauge type load cell includes a strain generating body and a strain gauge attached to the strain generating body. The strain body has a movable part configured such that the weight of the object to be weighed is applied as a load. When the weight of the object to be weighed is applied to the movable part as a load, the movable part is displaced as seen from the fixed position of the strain generating body, and the displacement is detected by a strain gauge and converted into an electric signal. The weight of the object to be weighed can be measured.

  A load cell type weighing device using such load cell type weighing technology is used for weighing various types of objects to be weighed. For this reason, various devices are required for the housing of the load cell type weighing device according to the type of the object to be weighed and the measurement environment.

  In particular, when measuring agricultural and fishery products or fresh food, etc., advanced food hygiene management is required for the load cell type measuring device. For this reason, it is necessary to frequently wash or disinfect a load cell type weighing device used for such purposes. Therefore, when measuring agricultural and fishery products or fresh foods, stainless steel having high corrosion resistance is used for the cover member that forms the casing of the load cell type measuring device in order to increase the convenience for washing. Furthermore, the load cell weighing device is also required to be waterproof so that it can be washed.

  For example, a waterproof scale disclosed in Patent Document 1 is an example of a weighing device having a casing made of stainless steel and having waterproof properties. This waterproof balance includes a synthetic resin lower case in which a load cell accommodating chamber is formed, and a stainless steel waterproof cover that covers the upper portion of the load cell accommodating chamber.

JP 2003-322556 A

  In the waterproof balance disclosed in Patent Document 1 described above, there arises a problem that dirt accumulates in the housing of the balance.

  More specifically, in the waterproof balance disclosed in Patent Document 1, a load cell collection chamber in which a load converter such as a load cell and an electronic circuit board are collected has a waterproof diaphragm to ensure water tightness. On the other hand, the upper case made of stainless steel is merely engaged with the lower case with a hook, and the watertightness is insufficient. In other words, the waterproof balance disclosed in Patent Document 1 does not have a configuration in which a casing constituted by an upper case and a lower case is sealed at a waterproof level. Here, the term “sealed to a waterproof level” means that the casing is sealed to such an extent that water can be prevented from entering from the outside. As described above, in the case where the watertightness is insufficient in the case composed of the upper case and the lower case like the waterproof balance shown in Patent Document 1, dirt or the like enters the case and accumulates therein. It becomes unsanitary. For this reason, it is preferable that this housing | casing is a structure sealed at the waterproof level.

  By the way, when the casing is sealed at a waterproof level with a stainless steel cover member, stainless steel has a high thermal conductivity, so that the inside of the load cell type weighing device is likely to condense easily due to the influence of temperature changes in the outside world. . Furthermore, because the structure is sealed at a waterproof level, the generated condensation does not easily dry, and moisture accumulates in the housing, causing problems such as poor insulation, weighing errors, or corrosion of the strain body in the load cell. Problems arise.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a weighing device that prevents the influence of condensation on a load transducer in a structure in which a casing is sealed at a waterproof level by a stainless steel cover member. It is to be realized.

  In order to solve the above-described problems, a digital scale according to the present invention supports and loads a load converter that converts a load applied from an article into an electrical signal and a placing tray on which the article is placed. The tray receiver for applying the load of the article to the load converter, the bottom formed by a heat insulating material, the load converter, the portion of the dish receiver near the load converter, and the measured value A stainless steel cover member that covers an electrical component to be electrically displayed and to be inserted through the tray receiving portion, and between the stainless steel cover member and the tray receiving portion A casing that is sealed so that the tray receiver can be moved up and down and sealed to a predetermined waterproof level, and an opening through which the tray receiver is inserted covers the load converter in the casing. Are erected on the bottom and formed by heat insulating material Comprising a heat insulating wall member which is a.

  Here, being sealed to a predetermined waterproof level means that the load converter housed in the housing, the portion of the tray receiving portion near the load converter, and the electrical components are free from problems due to moisture. Furthermore, it is sealed to such an extent that water can be prevented from entering from the outside of the housing.

  Further, the tray receiver extends from the inside of the housing to the outside of the housing, and a portion in a predetermined range on the side close to the load converter is accommodated in the housing.

  According to the configuration described above, the casing has a stainless steel cover member and a bottom, and is sealed to a predetermined waterproof level. Thus, since the housing is covered with stainless steel having high corrosion resistance and is sealed at a waterproof level, washing with water using a detergent or the like is possible, and convenience for washing is enhanced.

  Moreover, since the said heat insulation wall member is further provided in the housing | casing sealed by the predetermined waterproof level as mentioned above, an air layer can be provided between the cover member and heat insulation wall member which comprise a housing | casing. Furthermore, the load converter can be covered with a heat insulating wall member having a low thermal conductivity.

  For this reason, even if condensation occurs in a case covered with a stainless steel cover member having a high thermal conductivity due to a temperature change in the outside of the weighing device, it is prevented that condensation occurs in the load converter. Can do. Further, it is possible to prevent moisture due to condensation generated in the housing by the heat insulating wall member from reaching the load converter.

  Therefore, it is possible to prevent the influence of condensation on the load converter in a structure in which the casing is sealed at a waterproof level by the stainless cover member.

  In the weighing device according to the present invention, in the configuration described above, moisture in the housing portion is adsorbed in the housing portion that is formed by the heat insulating wall member and the bottom portion and is a space for housing the load converter. And a dehumidifying agent for drying.

  According to the configuration described above, since the dehumidifying agent is provided in the housing portion, even when the inside of the housing portion is humid, the moisture can be adsorbed and dried. For this reason, it is possible to prevent problems such as poor insulation and weighing errors from occurring in the load transducer due to moisture.

  As the dehumidifying agent provided in the storage unit, for example, silica gel that adsorbs moisture and releases moisture by heating can be used.

  Further, in the weighing device according to the present invention, in the configuration described above, the heat insulating material may be at least one of synthetic resin, glass wool, rock wool, wool heat insulating material, cellulose fiber, and cork. .

  Further, in the weighing device according to the present invention, in the configuration described above, the cover member is formed with a cover member opening that is an opening for allowing the dish receiving portion to be inserted therethrough, and the housing includes the cover member and the cover member. The diaphragm may be configured to include a diaphragm that closes a gap between the dish receiving portion inserted through the cover member opening and a sealing member that seals a joint portion between the cover member and the bottom portion. .

  According to the above-described configuration, since the diaphragm and the sealing member are provided, it is possible to provide a sealed structure so that water does not enter the housing while preferably allowing the dish receiving portion to move up and down.

  Further, the weighing device according to the present invention has the above-described configuration, wherein the bottom includes a bottom opening for taking in outside air, and a waterproof and moisture-permeable material for blocking the bottom opening and preventing water from entering from the opening. , May be provided.

  According to the above-described configuration, since the bottom opening and the waterproof and moisture-permeable material are provided, it is possible to maintain the balance of the atmospheric pressure between the inside of the housing that houses the load converter and the outside of the housing. Therefore, since the balance of the atmospheric pressure between the inside and the outside of the housing can be maintained in this way, the measurement accuracy can be improved.

  The present invention is configured as described above, and has an effect that the influence of condensation on the load converter can be prevented in a structure in which the casing is sealed at a waterproof level by a stainless cover member.

It is a perspective view which shows the external appearance structure seen from diagonally forward of the digital balance which concerns on embodiment of this invention. It is sectional drawing of the digital balance of FIG. It is a bottom view of the digital balance of FIG. It is sectional drawing of the digital balance of FIG.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In the following, the same or corresponding components are denoted by the same reference numerals throughout all the drawings, and the description thereof is omitted.

  The digital scale 1 according to the present embodiment corresponds to this as long as the weight of the article is measured and the measured value obtained by the measurement is digitized and electrically displayed. In the following, a so-called digital upper pan automatic scale in which the weight (weight) of an article placed on the weighing pan 2 is measured and the measured value is digitally displayed on the display unit 34 will be exemplified. The digital balance 1 is configured to obtain the weight of an article (object to be weighed) using a strain gauge type load cell, for example.

  By the way, when agricultural (fishery) products, fresh foods, etc. are used as articles (objects to be weighed), the seafood, vegetables, etc. that are articles (objects to be weighed) contain a lot of water, and the environment surrounding the digital balance 1 is high humidity. It will be something. Further, in an environment where seafood and vegetables are handled, advanced food hygiene management is required. For this reason, it is necessary to wash | clean and disinfect the digital balance 1 frequently, and the waterproofness (or water resistance) which can respond to washing | cleaning is requested | required with respect to the digital balance 1. FIG.

  Therefore, the digital balance 1 according to the present embodiment is provided with a seal member (for example, rubber) at the joint 10 in the housing 4 of the digital balance 1 so that it can be used in an environment that gets wet with water, such as a food processing plant. Packing or the like) 9 is disposed and attached to prevent flooding.

(Configuration of digital scale)
A more specific configuration of the above-described digital balance 1 will be described with reference to FIGS.

  FIG. 1 is a perspective view showing an external configuration of a digital balance 1 according to an embodiment of the present invention as viewed obliquely from the front. FIG. 2 is a cross-sectional view of the digital balance 1 of FIG. In addition, in the digital balance 1, when the side provided with the display unit 34 is the front and the side opposite to the side provided with the display unit 34 is the rear, FIG. 2 shows the digital scale 1 along the rear from the front. The cross-sectional structure when cut vertically is shown.

  As shown in FIG. 1, the digital balance 1 is configured to include a weighing pan 2 and a digital balance body 3 in an external shape.

  The weighing pan 2 is a tray for placing an article (object to be weighed). The weighing pan 2 has an article (object to be weighed) placed on the upper surface side. As shown in FIG. 2, the weighing pan 2 is in contact with the tray receiver 31 on the lower side and is supported by the tray receiver 31. And it is comprised so that the load of the mounted article | item (to-be-measured object) may be added to the tray receiver 31 supported on the downward side.

  The digital scale body 3 includes a housing 4 and a member housed or attached to the housing 4. In addition, although the shape of the housing | casing 4 is arbitrary, in this embodiment, the structure in which the housing | casing 4 is formed in the flat rectangular parallelepiped shape is illustrated.

  The housing 4 is formed of a bottom plate 5 and a cover member 6. The cover member 6 is formed, for example, in the shape of a hollow, flat, semi-open rectangular parallelepiped having an open bottom surface, an inclined front side surface, and an opening (cover member opening) 8 at the center of the top surface. . Since high food hygiene management is required for the digital balance 1, the cover member 6 is made of stainless steel having high corrosion resistance.

  On the other hand, the bottom plate 5 is made of a synthetic resin having a lower thermal conductivity than stainless steel. Although the bottom plate 5 is formed in a flat plate shape as a whole, as shown in FIGS. 3 and 4, a pair of concave portions 28 recessed toward the upper side of the digital balance 1 are provided. A bottom plate opening 36 is formed on one side surface of each recess 28, and the bottom plate opening 36 is closed by a waterproof and moisture permeable material 27. FIG. 3 is a view showing the bottom side of the digital balance 1 of FIG. FIG. 4 is a cross-sectional view of the digital balance 1 of FIG. FIG. 4 shows a cross-sectional structure of the digital balance 1 cut out in a direction perpendicular to the line connecting the front and rear of the digital balance 1.

  The lower edge portion of the cover member 6 is bent inward over the entire circumference to constitute an abutting portion 6a. The outer edge portion 5a of the bottom plate 5 comes into contact with the contact portion 6a, and the contact portion 6a and the outer edge portion 5a of the bottom plate 5 are joined by the screw 22. This joint portion constitutes a joint portion 10 between the bottom plate 5 and the cover member 6. In this way, a flat rectangular parallelepiped casing 4 is formed using the bottom plate 5 and the cover member 6.

  Between the contact part 6a of the cover member 6 and the outer edge part 5a of the bottom plate 5, a seal member (for example, rubber packing or the like) 9A is disposed, whereby the contact part 6a of the cover member 6 and the bottom plate 5 The space between the outer edge 5a is sealed to a predetermined waterproof level (waterproof specification).

  Further, the lower part of the tray receiver 31, the load cell 40, the control board 41, the battery box 38, electric wiring (not shown), and the like are accommodated in the housing 4.

  A battery collection opening 5b is formed in a part of the bottom plate 5, and a battery box housing portion 5c is formed so as to surround the battery collection opening 5b. A battery box 38 to which a battery 39 is attached is housed in the battery box housing portion 5c. The battery receiving opening 5 b of the bottom plate 5 is closed by a plate-shaped bottom lid 7.

  The bottom lid 7 is detachably attached to the bottom plate 5 with screws (not shown) or the like. A sealing member (for example, rubber packing) 9B is disposed between the bottom lid 7 and the bottom plate 5 so that the gap between the bottom lid 7 and the bottom plate 5 is sealed to the predetermined waterproof level. Yes.

  The load cell 40 includes a strain body 29 and a strain gauge 30 attached to a predetermined part of the strain body 29. On the other hand, the tray receiver 31 includes a receiving portion 31a that extends horizontally and a mounting portion 31b that protrudes downward from a central portion of the receiving portion 31a. The strain body 29 is attached to a load cell attachment plate 37 provided on the bottom plate 5 in a cantilever manner so that one end thereof is supported. The other end portion of the strain generating body 29 supports the attachment portion 31 b of the tray receiver 31.

  As shown in FIG. 4, an internal pressure adjusting diaphragm 42 is provided between the load cell mounting plate 37 and the bottom plate 5. The internal pressure adjusting diaphragm 42 adjusts the internal pressure change due to the deflection of the load cell 40 due to weighing.

  The upper end portion of the mounting portion 31b of the tray receiver 31 protrudes upward from the opening 8 of the cover member 6, the receiving portion 31a is located at the upper end, and the weighing pan 2 is attached to the receiving portion 31a. Thereby, when an article is placed on the weighing pan 2, the load of the article is applied to the strain body 29 of the load cell 40 via the tray receiver 31, and the strain of the strain body 21 is detected by the strain gauge 30. Is done. In this way, the weight of the article placed on the weighing pan 2 is detected.

  Further, the diaphragm 11 is disposed between the peripheral edge portion 6 b of the opening 8 of the cover member 6 and the outer edge portion of the receiving portion 31 a of the tray receiver 31. That is, the diaphragm 11 is disposed in a gap portion formed between the receiving portion 31 a and the peripheral edge portion 6 b of the cover member 6. As a result, the space between the cover member 6 and the tray receiver 31 is sealed to the predetermined waterproof level described above. The both ends of the diaphragm 11 are attached to the peripheral edge portion 6b of the opening 8 of the cover member 6 and the outer edge portion of the receiving portion 31a of the tray receiver 31 by screws 23, 24 and the like. The diaphragm 11 is formed of a material having a high flexibility, and is configured so as not to exert a reaction force on the tray receiver 31 substantially when the tray receiver 31 moves in the vertical direction. Thereby, the weight of the article placed on the weighing pan 2 can be accurately measured with the inside of the housing 4 sealed from the outside.

  Further, a display unit 34 is provided on the front surface of the cover member 6, and a control board 41 is attached to the inner surface of the cover member 6 so as to be positioned behind the display unit 34.

  As described above, the lower part of the tray receiver 31, the load cell 40, the control board 41, and the battery box 38 are accommodated in the housing 4. Here, a weighing mechanism is constituted by the weighing pan 2, the strain body 29, the strain gauge 30, the tray receiver 31, and the load cell 40. Further, the battery box 38, the battery 39, the control board 41, and necessary electrical wiring (not shown) constitute an electrical component.

  A power ON / OFF sheet key switch 32, an operation sheet key switch 33, and four height adjusting legs 35 are further provided on the outer surface of the housing 4 (the bottom plate 5 and the cover member 6).

  The power ON-OFF sheet key switch 32 switches the power of the digital balance 1 on and off, and the operation sheet key switch 33 is an input means for performing various settings. Various settings include settings for zero correction, taring, and the like.

  The display unit 34 displays information such as a measurement value, and can be realized by an LCD (Liquid crystal display) or the like.

  The height adjustment legs 35 are legs for supporting the digital scale body 3 and are provided at the four corners of the bottom surface of the housing 4 so that the digital scale body 3 can be supported in a horizontal position. The height of can be adjusted.

  As described above, the bottom lid 7 is for closing the battery collection opening 5b of the battery box 38 housed in the digital scale body 3. That is, the bottom lid 7 can be attached to and detached from the housing 4. When the bottom lid 7 is removed from the housing 4, the battery collection opening 5b of the battery box 38 is exposed to the outside. The battery 39 can be accommodated in the battery box 38 through the battery collection opening 5b. In addition, the sealing member 9B is attached to the fitting portion of the bottom lid 7 as described above, so that water from the outside can be prevented.

  The battery box 38 provided inside the housing 4 accommodates the battery 39 as described above. The battery box 38 includes an electrode (not shown), and the electrode is connected to a power supply terminal (not shown) of the control board 41 via a wiring (not shown).

  The load cell 40 obtains the weight of the article (object to be weighed) from the load applied from the article (object to be weighed) placed on the weighing pan 2. The load cell 40 includes a strain generating body 29 that deforms in proportion to a force and a strain gauge 30 that measures the amount of deformation (strain), and a load applied to the strain generating body 29 from an article (object to be weighed). The weight of the article (object to be weighed) is detected from the deformation amount (strain) of the strain body 29 caused by the above.

  More specifically, in the load cell 40, for example, a Wheatstone bridge is configured by four strain gauges 30 whose electric resistance changes in proportion to the strain. From the Wheatstone bridge, a very small voltage signal proportional to the applied voltage and proportional to the distortion is output to the control board 41. The control board 41 amplifies this small voltage signal and controls the display unit 34 to display the weight of the article as a numerical value.

  The control board 41 performs various controls of the digital balance 1. The control board 41 is provided in front of the digital balance 1, that is, on the side where the display unit 34 is provided in the digital scale body 3. In the example of FIG. 2, the control board 41 is provided on the back side of the display unit 34.

  Further, as described above, the bottom plate 5 of the housing 4 is provided with a pair of recesses 28, and the bottom plate opening 36 formed in a part of the side surface of each recess 28 is closed by the waterproof and moisture-permeable material 27. there were. That is, since the digital balance 1 is sealed with the sealing members 9A and 9B and the space between the housing 4 and the tray receiver 31 is sealed with the diaphragm 11 in order to improve waterproofness, It becomes a sealed structure. However, in order to increase the weighing accuracy of the digital balance 1, it is necessary to maintain a balance between the pressure inside and outside the housing 4.

  Therefore, in the digital balance 1 according to the present embodiment, the atmospheric pressure can be adjusted through the pair of waterproof and moisture-permeable materials 27 on the side surface of the concave portion 28 of the bottom plate 5 where water is less likely to be applied. As the waterproof and moisture permeable material 27, a material made by combining a film obtained by stretching polytetrafluoroethylene and a polyurethane polymer, so-called Gore-Tex (registered trademark) can be used.

  As described above, the digital scale 1 according to the present embodiment needs to keep the atmospheric pressure inside and outside the housing 4 in a balanced state, and therefore uses the waterproof and moisture-permeable material 27 for a part of the bottom plate 5. For this reason, moisture-containing air enters the inside of the housing 4 through the waterproof and moisture-permeable material 27, and condensation is likely to occur due to a sudden temperature change in the external environment surrounding the digital scale 1. In addition, as a sudden temperature change of the external environment surrounding the digital balance 1, a case where the frozen processed product is weighed and then washed with hot water is assumed.

  Therefore, in the digital scale 1 according to the present embodiment, the load cell 40 is covered with the heat insulating cover 13 made of a synthetic resin so that the generated condensation does not adversely affect water-damaging members such as the strain gauge 30 of the load cell 40. It is configured as follows.

  More specifically, as shown in FIG. 2 and FIG. 4, the load cell 40 is confiscated in the accommodating portion 15 formed by the synthetic resin heat insulating cover 13 having a low thermal conductivity and the synthetic resin bottom plate 5. Has been. The accommodating portion 15 has an opening 12 at an upper portion thereof so that the attachment portion 31b of the tray receiver 31 can pass therethrough. In addition, a dehumidifying agent 14 is disposed in the housing portion 15 in order to remove moisture in the housing portion 15. In addition, as the dehumidifying agent 14 accommodated in the accommodating part 15, the silica gel which adsorb | sucks a water | moisture content and discharge | releases a water | moisture content by heating can be utilized, for example.

  Thus, since the load cell 40 is accommodated in the accommodating portion 15 formed by the synthetic resin heat insulating cover 13 and the bottom plate 5, it is possible to reduce the influence due to the temperature change surrounding the external world of the digital scale 1. . For this reason, even if dew condensation occurs in the housing 4, it is possible to prevent dew condensation from occurring in the housing portion 15. Furthermore, it is possible to prevent the load cell 40 from getting wet by water droplets due to condensation that has adhered to the cover member 6 inside the housing 4.

  Further, by providing the heat insulating cover 13 in the housing 4, air convection in the housing 4 can be blocked. For this reason, the contact of the air containing moisture and the load cell 40 can also be reduced.

  In addition, since an air layer is formed between the housing 4 and the housing portion 15, the heat insulating effect into the housing portion 15 is enhanced, and the temperature change in the housing portion 15 can be further reduced.

  In addition, as a synthetic resin which forms the baseplate 5 and the heat insulation cover 13 mentioned above, a polystyrene foam, a urethane resin, or a phenol resin etc. are mentioned, for example.

(Operations and effects related to the configuration of the digital scale)
Next, the function and effect of the digital balance 1 configured as described above will be described. The digital balance 1 is used, for example, for weighing a frozen processed product. If it does so, the air containing moisture will infiltrate into the housing | casing 4 through the waterproof moisture-permeable material 27 at the time of measurement. When the metering is completed, for example, washing is performed with hot water. In this case, when no dew condensation measures are taken for the load cell 40, moisture (moisture) in the housing 4 may be condensed.

  However, since the load cell 40 is accommodated in the accommodating portion 15 formed by the heat insulating cover 13 and the bottom plate 5 in the housing 4 of the digital balance 1 of the present embodiment, it is possible to prevent condensation from occurring in the load cell 40. be able to. In addition, it is possible to prevent water drops due to condensation generated in the housing 4 from being applied to the load cell 40. Moreover, the convection of the air in the housing | casing 4 can be interrupted | blocked and the contact with the air containing moisture and the load cell 40 can be reduced.

  Furthermore, since the dehumidifying agent 14 is disposed in the housing portion 15, moisture inside the housing portion 15 can be adsorbed by the dehumidifying agent 14. For this reason, the moisture contained in the accommodating part 15 can be removed.

  In addition, in the digital balance 1 which concerns on this Embodiment, although it was the structure which forms the baseplate 5 and the heat insulation cover 13 with a synthetic resin, it is not limited to this. For example, glass wool, rock wool, wool insulation, cellulose fiber, or cork glass fiber, artificial mineral fiber, natural fiber, or the like may be used.

  From the foregoing description, many modifications and other embodiments of the present invention are obvious to one skilled in the art. Accordingly, the foregoing description should be construed as illustrative only and is provided for the purpose of teaching those skilled in the art the best mode of carrying out the invention. The details of the structure and / or function may be substantially changed without departing from the spirit of the invention.

  The digital balance 1 of the present invention is useful as a digital balance or the like that is waterproof and that can prevent the influence of condensation on the load cell 40.

DESCRIPTION OF SYMBOLS 1 Digital scale 2 Weighing pan 3 Digital scale main-body part 4 Case 5 Bottom plate 5a Outer edge part 5b Battery collection opening 5c Battery box accommodating part 6 Cover member 6a Contact part 6b Peripheral part 8 Opening 9 Seal member 9A Seal member 9B Seal member 10 Joining part 11 Diaphragm 12 Opening 13 Heat insulation cover 14 Dehumidifying agent 15 Storage part 27 Waterproof / moisture permeable material 28 Recess 31 Dish holder 31a Receiving part 31b Mounting part 34 Display part 36 Bottom plate opening 38 Battery box 39 Battery 40 Load cell 41 Control board

Claims (5)

A load transducer for converting a load applied from the article into an electrical signal;
A tray receiver that supports a mounting tray on which the article is placed and applies a load of the placed article to the load converter;
A bottom portion formed of a heat insulating material, the load converter, a portion of the tray receiving portion on the side close to the load converter, and an electrical component for digitizing and displaying the measured value electrically, A stainless steel cover member that covers the plate so as to be inserted therethrough, and seals between the stainless steel cover member and the plate receiving portion so that the plate receiving portion can move up and down to a predetermined waterproofness. A housing sealed to a level,
A measuring device comprising: a heat insulating wall member standing on the bottom so as to cover the load converter with an opening through which the dish receiving portion is inserted, and formed of a heat insulating material. .   The dehumidifying agent which adsorb | sucks and dries the water | moisture content in this accommodating part is provided in the accommodating part which is the space which accommodates the said load converter formed by the said heat insulation wall member and the said bottom part. Weighing equipment.   The measuring device according to claim 1, wherein the heat insulating material is at least one of synthetic resin, glass wool, rock wool, wool heat insulating material, cellulose fiber, and cork. The cover member is formed with a cover member opening which is an opening for inserting the dish receiving portion,
The housing is
A diaphragm for closing a gap between the cover member and the dish receiving portion inserted through the cover member opening;
The weighing device according to claim 1, further comprising a sealing member that seals a joint portion between the cover member and the bottom portion. The bottom includes a bottom opening for taking in outside air;
The weighing device according to any one of claims 1 to 4, further comprising: a waterproof and moisture-permeable material that blocks the bottom opening and prevents water from entering from the opening.

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