JP3166613U - Moisture meter - Google Patents

Abstract

Provided is a moisture meter in which a protection unit can be easily attached to and detached from a balance lid. At least two heat-resistant glass plates, which can be attached to and detached from a balance main body, a sample dish, a balance lid, and a balance lid, are provided for protecting a heating element. And a protection unit 80 having a frame body having an opening formed therein. The balance lid unit 90 is formed so as to be rotatable around a part of the lower part of the side wall and the rear part of the upper surface of the main body housing 20 as axes. . At least two protrusions 91 having a shaft portion 91b and a head portion 91a larger than the shaft portion 91b are formed on the balance lid portion 90. The opening of the frame of the protection unit 80 is The hole is larger than the head 91a and adjacent to each other so that the hole smaller than the head 91a of the projection 91 is connected. [Selection diagram] Fig. 1

Description

  The present invention relates to a moisture meter.

The electronic moisture meter measures the moisture content contained in the sample from the decrease in the weight of the sample by heating and drying the sample placed on the sample pan (see, for example, Patent Document 1).
FIG. 4 is a perspective view showing a configuration of a conventional electronic moisture meter. FIG. 4 shows an electronic moisture meter with the lid open, and a portion of the housing is omitted for easy understanding. FIG. 5 is a cross-sectional view of the electronic moisture meter with the lid closed.
Such an electronic moisture meter 101 includes a balance body portion 50 having a case (main body housing) 20 in which a load detection sensor (load detection portion) 10 for detecting a load is accommodated, and a pan receiver attached to the load detection sensor 10. 30, a sample tray 40 on which a sample is placed, a straight tube type halogen heater (heating body) 60, a heater frame 189, and a case (lid housing) 70, a protection cover unit 190, and a protection unit 180 Is provided.

The case 20 has an annular windshield 22 formed at the center of a rectangular upper plate (upper surface) 21, and the upper plate 21 located at the center of the annular windshield 22 has a vertical direction. A circular shaft hole 23 is formed through the upper plate 21.
In addition, a display unit 24 is formed in the front part of the upper plate 21, and “moisture content” is displayed on the display unit 24.

The load detection sensor 10 is a rectangular parallelepiped aluminum alloy block, and includes a Roverval mechanism, a first lever, a second lever, and a connecting member that connects the Roverval mechanism, the first lever, and the second lever. It is formed by providing holes and slits that penetrate in the front-rear direction.
The Roverval mechanism has a fixed column fixed to the case 20 via a mounting member 12, a movable column to which a metal columnar connecting shaft 11 is coupled, and flexible portions (hinge portions) at both ends. It consists of a book beam. The movable column and the fixed column are connected by two parallel beams.

The base end portion of the take-out member 13 is fixed to the other end portion of the second lever with a screw or the like. Thereby, the load of a sample tilts the front-end | tip part of the taking-out member 13 via a movable pillar, a connection member, a 1st lever, a connection member, and a 2nd lever. Such displacement of the tip of the carry-out member 13 is detected by a displacement sensor 15 fixed to the case 20. Further, a force coil of the electromagnetic force generator 14 is fixed to the leading end portion of the take-out member 13. Thereby, the magnitude of the current flowing through the force coil of the electromagnetic force generation device 14 is based on the detection signal from the displacement sensor 15 so that the displacement of the leading end portion of the carry-out member 13 becomes zero (see FIG. (Not shown).
The lower end portion of the connecting shaft 11 is coupled to the upper surface of the movable column of the load detection sensor 10, and the pan receiver 30 can be attached to and detached from the upper end portion of the connecting shaft 11 by the measurer.
The load detection sensor 10 is disposed in the internal space of the case 20, and the connecting shaft 11 is disposed in the center of the windshield 22 through the shaft hole 23 from the inside of the case 20.

FIG. 7 is a plan view of the sample dish 40. The sample dish 40 is disposable and is made of metal. Such a sample tray 40 has a circular bottom plate 41 and an annular side wall 42, and a sample is placed on the upper surface of the bottom plate 41 by a measurer.
FIG. 8 is a plan view of the tray receiver 30. The tray receiver 30 is made of stainless steel. Such a tray receiver 30 has a cylindrical portion 31 and three branch portions 32 extending in the horizontal direction around one point of the central axis of the cylindrical portion 31. The three branch portions 32 extend at a predetermined distance in different horizontal directions around one point of the central axis of the cylindrical portion 31, for example, extend in the direction of 1 o'clock, 5 o'clock and 9 o'clock in plan view. ing. Further, the end portion of the branch portion 32 extends upward, the sample dish 40 is placed on the upper surface of the branch portion 32, and the end portion of the branch portion 32 abuts against the side wall 42 of the sample tray 40, The receptacle 30 and the sample dish 40 are combined. An insertion hole 33 is formed in the lower surface of the cylindrical portion 31, and the upper end portion of the connecting shaft 11 is inserted into the insertion hole 33 so that the tray receiver 30 and the load detection sensor 10 are coupled. It has become.

The case 70 has a rectangular upper plate 71 and a rectangular cylindrical side wall 72 extending downward from the peripheral edge of the upper plate 71, and a rectangular cylindrical heater frame 189 extending downward on the lower surface of the upper plate 71. The halogen heater 60 is attached to the heater frame 189.
Then, the case 70 is rotatably attached with the lower part of one side of the side wall 72 and the rear side of the upper plate 21 of the case 20 as axes. At this time, when the case 70 is closed, the case 70 covers the windshield 22. On the other hand, when the case 70 is opened, the upper plate 71 of the case 70 is replaced with the upper plate 21 of the case 20. It is supposed to be vertical.

By the way, in the electronic moisture meter 101, since the volatile matter is generated from the sample during the measurement, the halogen heater 60 must be protected from the volatile matter. Therefore, it is necessary to arrange the heat-resistant glass plate 83 between the sample and the halogen heater 60. Further, the life of the halogen heater 60 is 5000 hours, and it is necessary to replace it with a new halogen heater in about one year at the earliest.
Therefore, the electronic moisture meter 101 is used in which the protection unit 180 in which the heat-resistant glass plate 83 is unitized can be attached to and detached from the balance lid 190.

FIG. 6 is a perspective view of a conventional protection unit.
The protection unit 180 includes a frame 82 having an upper plate 82a in which two openings 181 are formed, and a side wall 82b extending downward from the peripheral edge of the upper plate 82a, and a quadrangle disposed at the center of the upper plate 82a. Heat resistant glass plate 83. The opening 181 has a circular shape. And when attaching the protection unit 180 to the balance cover part 190, the two screws 184 (refer FIG. 4) are used. Such a screw 184 having a head 184a larger than the opening 181 and a shaft 184b smaller than the opening 181 is selected.

  According to the electronic moisture meter 101 using such a protection unit 180, when the measurer replaces the halogen heater 60, the case 70 is opened and the frame plate 82 of the protection unit 180 is pressed with the left hand. However, after the two screws 184 were loosened and removed with a screwdriver with the right hand, the protection unit 180 was removed from the balance lid 190 and the halogen heater 60 was replaced. Then, after completing these operations, by placing the protection unit 180 in a predetermined position and holding the frame plate 82 with the left hand, the two screws 184 passed through the opening 181 are tightened with a screwdriver with the right hand, The protection unit 180 was fixed to the balance lid part 190.

JP 2003-302324 A

However, in the electronic moisture meter 101 using such a protection unit 180, when the protection unit 180 is removed, the protection unit 180 may be accidentally dropped at the moment when the screw 184 is removed. At this time, the heat-resistant glass plate 83 arranged in the protection unit 180 may be broken and damaged.
Further, when attaching the protection unit 180, the heat-resistant glass plate 83 may be touched with a finger when the screw 184 is tightened with a driver with the right hand while holding the frame plate 82 of the protection unit 180 with the left hand. It was. If a fingerprint is attached to the heat-resistant glass plate 83, it causes a problem that heating unevenness occurs during measurement.
Then, an object of this invention is to provide the moisture meter which can attach or remove a protection unit to a balance cover part easily.

  The moisture meter of the present invention made to solve the above-mentioned problems is provided with a box-shaped main body housing, and a balance main body portion in which a load detection unit for detecting a load is housed in the main body housing, and the main body A lid having a sample pan attached to the load detection unit above the upper surface of the housing, an upper plate, and a side wall extending downward from the peripheral edge of the upper plate, and a heating body on the lower surface of the upper plate A balance lid portion to be attached; a heat-resistant glass plate for protecting the heating body; and a protection unit having a frame body having at least two openings formed therein. The balance cover part is a moisture meter formed so as to be rotatable about a part of a lower part of the side wall and a rear part of the upper surface of the main body housing, and the balance cover part includes a shaft At least two having a head and a head larger than the shaft A protrusion is formed, and the opening of the frame of the protection unit has an adjacent dharma shape so that a hole larger than the head of the protrusion and a hole smaller than the head of the protrusion are coupled. I am doing so.

According to the moisture meter of the present invention, when removing the protection unit, the protection unit is removed after moving the protection unit so that the protrusion moves from the small hole to the large hole. Therefore, the protection unit is not accidentally dropped at the moment when the screw is removed.
Also, when attaching the protection unit, insert the protrusion from the large hole, and move the protection unit so that the protrusion moves from the large hole to the small hole. become. Therefore, it is not necessary to hold the heat-resistant glass plate by hand, so that fingerprints can be prevented from sticking to the heat-resistant glass plate.

  As described above, according to the moisture meter of the present invention, the protection unit can be easily attached to and removed from the balance lid.

(Means and effects for solving other problems)
Further, in the moisture meter of the above device, the protrusion is a screw having a screw stop at a tip portion so as not to be detached from the balance lid portion, and the protection unit is attached to the balance lid portion by tightening the screw. It may be fixed.
And the moisture meter of the said device WHEREIN: The frame of the said protection unit has an upper board and the side wall extended below from the peripheral part of the said upper board, and a heat-resistant glass plate is arrange | positioned in the center part of the said upper board. In addition, an opening is formed in the peripheral portion of the upper plate, and the protrusion is formed on the lower surface of the upper plate of the balance lid portion, and when the balance lid portion is opened, The upper plate of the balance lid part and the upper plate of the protection unit are perpendicular to the upper surface of the main body housing, and when the balance lid part is closed, the upper plate of the protection unit, the heat-resistant glass plate, and the side wall The sample dish may be covered with.

Furthermore, in the moisture meter of the above device, when the upper plate of the protection unit is arranged to be perpendicular to the upper surface of the main body housing, the opening of the frame of the protection unit has a small hole on the upper side. However, a large hole may be located on the lower side.
According to the moisture meter of the present invention, since the protrusion is held by the weight of the protection unit itself, the protection unit is not accidentally dropped.

The perspective view which shows the structure of the electronic moisture meter which concerns on this invention. Sectional drawing of an electronic moisture meter. The perspective view of a protection unit. The perspective view which shows the structure of the conventional electronic moisture meter. Sectional drawing of an electronic moisture meter. The perspective view of the conventional protection unit. The top view of a sample plate. The top view of a tray receiver.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments described below, and it goes without saying that various aspects are included without departing from the spirit of the present invention.

FIG. 1 is a perspective view showing a configuration of an electronic moisture meter according to the present invention. FIG. 1 shows an electronic moisture meter with a lid opened, and a part of the housing is omitted for easy understanding. FIG. 2 is a cross-sectional view of the electronic moisture meter with the lid closed.
The electronic moisture meter 1 includes a balance main body 50 having a case (main body housing) 20 in which a load detection sensor (load detection unit) 10 for detecting a load is accommodated, a pan receiver 30 attached to the load detection sensor 10, A sample pan 40 on which a sample is placed, a straight tube type halogen heater (heating body) 60, a heater frame 89, and a balance lid portion 90 having a case (lid housing) 70, and a protection unit 80 are provided.

The case 70 has a rectangular upper plate 71 and a square cylindrical side wall 72 extending downward from the peripheral edge of the upper plate 71, and a rectangular cylindrical heater frame 89 extending downward on the lower surface of the upper plate 71. The halogen heater 60 is attached to the heater frame 89.
Then, the case 70 is rotatably attached with the lower part of one side of the side wall 72 and the rear side of the upper plate 21 of the case 20 as axes. At this time, when the case 70 is closed, the case 70 covers the windshield 22. On the other hand, when the case 70 is opened, the upper plate 71 of the case 70 is replaced with the upper plate 21 of the case 20. It is supposed to be vertical.

  On the lower surface of the heater frame 89, two screws (projections) 91 having a head portion 91a, a shaft portion 91b, and screwing 91c are arranged so as to be perpendicular to the lower surface. When the upper plate 71 of the case 70 is arranged so as to be perpendicular to the upper plate 21 of the case 20, one screw 91 is located at the upper right and the other one screw 91 is located at the lower left. It has become. The screwing 91c is formed at the tip of the screw 91, and is a double nut, a nut coated with an adhesive, or the like so that it does not come off from the lower surface of the heater frame 89 even if the screw 91 is loosened.

FIG. 3 is a perspective view of the protection unit.
The protection unit 80 includes a frame 82 having an upper plate 82a in which two openings 81 are formed, and a side wall 82b extending downward from the peripheral edge of the upper plate 82a, and a quadrangle disposed at the center of the upper plate 82a. Heat resistant glass plate 83. The opening 81 has an adjacent dharma shape so that a hole 81a larger than the head 91a of the screw 91 and a hole 81b smaller than the head 91a of the screw 91 are coupled. When the upper plate 82a of the protection unit 80 is arranged so as to be perpendicular to the upper plate 21 of the case 20, one opening 81 is located on the upper right, and the other one opening 81 is located on the lower left. It has become. At this time, in the opening 81, a small hole 81b is positioned on the upper side, and a large hole 81a is positioned on the lower side.

  According to the electronic moisture meter 1 using such a protection unit 80, when the measurer replaces the halogen heater 60, the case 70 is opened and two screws 91 are inserted with a screwdriver or the like with the right hand. Use to loosen. At this time, since the protection unit 80 is held by the screw 91, it does not fall. Then, the protection unit 80 is moved upward so that the screw 91 moves from the small hole 81b to the large hole 81a, and then removed by pulling the protection unit 80 forward. Then, the halogen heater 60 is replaced. Thereafter, the screw 91 is inserted from the large hole 81a, and the protection unit 80 is moved downward so that the screw 91 moves from the large hole 81a to the small hole 81b. At this time, the protection unit 80 is held by the screw 91. Then, the protection unit 80 is fixed to the balance lid 90 by tightening the two screws 91 with a screwdriver or the like with the right hand.

  As described above, according to the electronic moisture meter 1 of the present invention, the protection unit 80 can be easily attached to and detached from the balance lid portion 90.

<Other embodiments>
In the electronic moisture meter 1 described above, a configuration in which two screws 91 are arranged on the lower surface of the upper plate 71 of the balance lid 90 is shown. It is good also as a structure which catches by.

  The present invention can be suitably used for an electronic moisture meter or the like.

1 Electronic moisture meter 20 Main unit housing 21 Upper plate (upper surface)
DESCRIPTION OF SYMBOLS 10 Load detection part 30 Dish receptacle 40 Sample pan 50 Balance main-body part 60 Halogen heater (heating body)
70 Lid case 71 Upper plate 72 Side wall 80 Protection unit 81 Opening 81a Large hole 81b Small hole 82 Frame 83 Heat-resistant glass plate 89 Heater frame 90 Balance cover 91 Screw (projection)
91a Head 91b Shaft 91c Screw

Claims (4)

A balance main body portion including a box-shaped main body housing, and a load detection unit that detects a load inside the main body housing;
A sample pan attached to the load detection unit above the upper surface of the main body housing;
A lid cover having an upper plate and a side wall extending downward from a peripheral edge of the upper plate, and a balance lid portion to which a heating body is attached to the lower surface of the upper plate;
It is attachable to and detachable from the balance lid part, and includes a heat-resistant glass plate for protecting the heating body, and a protection unit having a frame body in which at least two openings are formed,
The balance lid portion is a moisture meter formed so as to be rotatable about a part of a lower portion of the side wall and a rear portion of the upper surface of the main body housing,
At least two protrusions having a shaft portion and a head portion larger than the shaft portion are formed on the balance lid portion,
The opening of the frame of the protection unit has a dharma shape adjacent so that a hole larger than the head of the protrusion and a hole smaller than the head of the protrusion are coupled. Total. The protrusion is a screw having a screw stop at the tip so that it does not come off from the balance lid.
The moisture meter according to claim 1, wherein the protection unit is fixed to the balance lid by tightening the screw. The frame of the protection unit has an upper plate and a side wall extending downward from the peripheral edge of the upper plate,
A heat-resistant glass plate is disposed at the center of the upper plate, and an opening is formed in the peripheral portion of the upper plate,
The protrusion is formed on the lower surface of the upper plate of the balance lid part,
When the balance lid is opened, the upper plate of the balance lid and the upper plate of the protection unit are perpendicular to the upper surface of the main body housing,
3. The moisture meter according to claim 1, wherein when the balance lid is closed, the sample dish is covered with an upper plate, a heat-resistant glass plate, and a side wall of the protection unit. . When the upper plate of the protection unit is arranged so as to be perpendicular to the upper surface of the main body housing, the opening of the frame of the protection unit has a small hole on the upper side and a large hole on the lower side. The moisture meter according to claim 3, wherein

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