JP6041256B2 - Weighing device - Google Patents

Description

  The present invention relates to a technique for improving the efficiency of weighing work in a place with shaking.

  In fishing operations such as the hinoki fishery, fishermen who have captured the fish sometimes measure and sort the fish using a scale. In this case, as shown in FIG. 9, the combined acceleration of gravity acceleration X * g (X is the mass of the fish) and acceleration X * a from another direction due to the shaking of the ship is applied to the fish to be weighed. For this reason, even if a measuring instrument such as a scale is brought into the ship, it is difficult to accurately measure the weight of the fish using it. Patent Document 1 discloses a technique for supporting fish weighing on a ship. The measuring instrument disclosed in the literature 1 has an encoder that detects the movement of a basket that supports a weighing pan in a spring balance. And this measuring device regards the time when the fluctuation range of the detection value of the encoder exceeds a predetermined value as the time when the vibration due to the wave occurs, and after the time T until the vibration due to the shock disappears, the timer is operated. The weight of the fish is measured based on the output signal of the encoder.

JP-A-4-268418

  However, in the case of the technique disclosed in Patent Document 1, an encoder and a signal processing device that performs various calculations must be installed, which causes a problem that the device becomes large and the manufacturing cost increases.

  This invention is made | formed in view of such a subject, and it aims at providing the mechanism which can implement | achieve accurate measurement in a place with a shake at low cost.

In order to solve the above problems, the present invention includes a housing, an object placing tray on which a weighing object is placed, a weight placing tray on which a weight is placed, and a first needle partially exposed outside the housing. A first needle in which the exposed portion extends in the horizontal direction, and a second needle in which the exposed portion extends in the horizontal direction, and the second needle is partially exposed outside the housing. And a first support mechanism housed in the housing, the first support mechanism including a member for supporting the object placing plate and the first needle so that they can move in the vertical direction. And a second support mechanism housed in the housing, the second support mechanism including a member for supporting the weight mounting plate and the second needle so that they can move in the vertical direction; First biasing means for applying an upward biasing force to a member that supports the object placing tray in the first support mechanism; Wherein and a second biasing means for applying a biasing force in the upward direction to a member for supporting the weight mounting置皿in the second support mechanism, said first needle and said second needle, each tip Has an arrow shape, one extends to the right and the other to the left, so as to oppose each other, and even in a place with shaking, the weight mounting plate has a mass corresponding to the target weight. When a weight is placed and the weighing object is placed on the object placing tray, the acceleration applied to the weight and the weighing object is equal, so that the first and second needles face each other. It is possible to measure whether the measurement object is heavier or lighter than the weight from the positional relationship between the first needle and the second needle in the vertical direction. A characteristic weighing device is provided.
Moreover, you may further provide the displacement amount amplification mechanism which amplifies the displacement amount of the said 1st needle | hook and the said 2nd needle | hook by the principle of an insulator.

  In the present invention, the first support mechanism supports the object placing tray and the needle so that they can move in conjunction with the vertical direction, and the first urging means is the object in the first support mechanism. An upward biasing force is applied to the member that supports the mounting tray. The second support mechanism supports the weight mounting plate and the needle so that they can move in conjunction with the vertical direction, and the second urging means has the object mounting plate in the second support mechanism. An upward biasing force is applied to the member that supports the. For this reason, when a weight having a mass corresponding to the target weight is placed on the weight placing tray and the weighing object is placed on the object placing tray, the acceleration X * a applied to the weight and the weighing object (vertical due to the shaking of the ship) The acceleration from a direction different from the direction) is always equal. Therefore, according to the present invention, it is possible to accurately measure whether the object placed on the object placing tray is heavier or lighter than the weight placed on the weight placing tray, regardless of whether it is shaken.

The front surface of the housing is provided with two long holes spaced in the left-right direction, each extending in the up-down direction, and the first needle and the second needle are may be exposed outside the casing through each of said two elongated holes.

Moreover, you may comprise the 1st and 2nd board connected with the upper surface of the said housing | casing, and the adjustment means which adjusts the position of the up-down direction of the said 1st and 2nd board separately .

1 is a front view, a right side view, and a top view of a fish weighing device according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line D-D ′ in FIG. It is the E-E 'line sectional view of Drawing 1 (A). It is F-F 'sectional view taken on the line of FIG. It is a figure explaining operation | movement of the 1st support mechanism in the fish weighing device which is 1st Embodiment of this invention. It is a figure explaining operation | movement of the 2nd support mechanism in the same apparatus. It is a sectional side view of the fish weighing device which is a 2nd embodiment of the present invention. It is a sectional side view of the fish measuring device which is 3rd Embodiment of this invention. It is a figure for demonstrating the subject of a prior art.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<First Embodiment>
FIG. 1A is a top view of a fish weighing device 10 according to the first embodiment of the present invention. FIG. 1B is a front view of the fish weighing device 10. FIG. 1C is a right side view of the fish weighing device 10. 2 is a cross-sectional view taken along the line DD ′ of FIG. FIG. 3 is a cross-sectional view taken along line EE ′ of FIG. FIG. 4 is a cross-sectional view taken along the line FF ′ of FIG. This fish weighing device 10 has the same weight as the target weight (for example, 5 kg weight) of the fresh fish that is the weighing object placed on the fish placing tray 20 (target placing plate) of the device 10 on the ship. It is for measuring whether there is. The housing 11 of the fish weighing device 10 has a hollow trapezoidal column shape surrounded by a trapezoidal left surface 12 and right surface 13 and a rectangular upper surface 14, a lower surface 15, a front surface 16, and a rear surface 17. Yes. The left surface 12 and the right surface 13 are opposed to each other with a width W1 (for example, W1 = 400 mm) in the left-right direction. The upper surface 14 and the lower surface 15 are opposed to each other with an interval of a width W2 (for example, W2 = 250 mm) in the vertical direction. The rear surface 17 is orthogonal to these four surfaces 12, 13, 14, 15. The front surface 16 is orthogonal to the right surface 13 and the left surface 12. The front surface 16 intersects the lower surface 15 at an acute angle and intersects the upper surface 14 at an obtuse angle. In the vicinity of the portion of the right surface 13 that intersects the rear surface 17 and the lower surface 15, a drain port 18 that penetrates the inside and outside of the right surface 13 is provided. The wall thickness of the lower surface 15 is reduced from the left surface 12, which is the surface opposite to the side having the drain port 93, to the right surface 13, which is the surface on the side having the drain port 18. An inclination from the left surface 12 toward the right surface 13 is provided. A non-slip rubber sheet 19 is attached to the bottom of the lower surface 15.

  Two long holes 21 </ b> L and 21 </ b> R are formed in the front surface 16 of the housing 11. The two long holes 21L and 21R are spaced apart in the left-right direction. Each of the two long holes 21L and 21R extends in the up-down direction. Of the two long holes 21L and 21R, the long hole 21L is located to the right from the left end of the front surface 16 by a distance W3 (W3 = W1 / 4). The long hole 21R is located at a position separated from the long hole 21L in the front face 16 to the right by a distance W4 (W4 <W3). A part of the needle 22L is exposed from the long hole 21L. A part of the needle 22R is exposed from the long hole 21R. The portions of the needles 22L and 22R exposed to the outside of the housing 11 extend horizontally in opposite directions (more specifically, the needle 22L is in the right direction and the needle 22R is in the left direction). The tip of each of the needles 22L and 22R has an arrow shape. Between the upper end portions of the long holes 21L and 21R on the front surface 16, letters “−0−” indicating a scale of 0 kg are written. A character “−5-” indicating a 5 kg scale line is marked at a position away from the character in the downward direction. Parts around the long holes 21L and 21R on the front surface 16 of the housing 11 are covered with a cover 23 made of acrylic resin.

  As shown in FIG. 2, two screw holes 24 </ b> L and 24 </ b> R and two holes 25 </ b> LL and 25 </ b> LC are formed in the upper surface 14 of the housing 11. The screw hole 24L is located at a position separated from the left end of the upper surface 14 to the right by a distance W3. The screw hole 24R is located at a position left from the right end of the upper surface 14 by a distance W3. The hole 25LL is located at a position away from the screw hole 24L on the upper surface 14 to the left by a distance W5 (W5 <W4). The hole 25LC is located on the upper surface 14 away from the screw hole 24L to the right by a distance W5.

  Knob operators 26L and 26R are attached to the two screw holes 24L and 24R on the upper surface 14 of the housing 11, respectively. The operating elements 26L and 26R serve as adjusting means for individually adjusting the vertical positions of the plates 29L and 29R connected to the inside of the upper surface 14 of the housing 11 through each of the operating elements 26L and 26R. The operating element 26L has a columnar knob portion 27L and a screw portion 28L extending downward from the center of the lower surface of the knob portion 27L. The screw portion 28L of the operating element 26L is fitted in the screw hole 24L of the housing 11. The tip of the portion of the screw portion 28L that protrudes into the housing 11 is fixed to the upper surface of the plate 29L in the housing 11. The operating element 26R includes a cylindrical knob portion 27R and a screw portion 28R extending downward from the center of the lower surface of the knob portion 27R. The screw portion 28R of the operation element 26R is fitted in the screw hole 24R of the housing 11. The tip of the portion of the screw portion 28R that protrudes into the housing 11 is fixed to the upper surface of the plate 29R in the housing 11.

  In the housing 11, a first support mechanism 31L and a second support mechanism 31R are housed. The first support mechanism 31L includes a U-shaped member 32L that is a member that supports the fish placing tray 20 and the needle 22L so that they can move in conjunction with the vertical direction. The second support mechanism 31R moves the weight placing plate 30 (see FIGS. 2 and 4) and the needle 22R housed in the casing 11 together with the mechanism 31R so that they can move in conjunction with the vertical direction. A U-shaped member 32R which is a supporting member is included.

  Describing both the mechanisms 31L and 31R in detail, the U-shaped member 32L of the first support mechanism 31L includes a base portion 33L extending in the left-right direction and an upward direction from the left and right ends of the base portion 33L. It has existing leg portions 34LL and 34LC. The leg portions 34LL and 34LC extend outside the housing 11 through the holes 25LL and 25LC of the housing 11. The upper ends of the leg portions 34LL and 34LC are fixed to the bottom surface of the fish placing tray 20. In the middle between the leg portions 34LL and 34LC on the base portion 33L of the U-shaped member 32L, there is a support column 35L having a height H1 (for example, H1 = 100 mm). The front ends of parallel link members 40LL and 41LL spaced in the vertical direction are pivotally attached (connected by shafts 1LL and 2LL) to the inside of the leg portion 34LL of the U-shaped member 32L. The front end portions of parallel link members 40LC and 41LC spaced in the vertical direction are pivotally attached (connected by shafts 1LC and 2LC) inside the leg portion 34LC of the U-shaped member 32L.

  As shown in FIG. 3, the rear end portions of the parallel link members 40LC and 41LC are pivotally connected (connected by shafts 3LC and 4LC) to the convex portions 46LC and 47LC inside the rear surface 17 of the housing 11. The rear end portions of the parallel link members 40LL and 41LL are pivotally attached (shafts 3LL (not shown) and 4LL (not shown)) to the convex portions 46LL (not shown) and 47LL (not shown) inside the rear surface 17 of the housing 11. ) A convex portion 48L is provided at a position slightly above the middle between the convex portion 47LL (not shown) and 47LC inside the rear surface 17 of the housing 11. One end of a housing 45L having a length L1 (for example, L1 = 150 mm) is pivotally connected (connected by a shaft 5L) to the convex portion 48L. The housing 45L extends obliquely forward and upward from a connection portion with the convex portion 48L. A portion of the housing 45L that is separated from the connection portion with the convex portion 48L by a distance L2 (L2 <L1 / 2) is pivotally connected (connected by a shaft 6L) to the upper end of the support 35L. The proximal end portion of the needle 22L is fixed to the other end portion of the housing 45L.

  In addition, two helical springs 50LL and 50LC serving as first urging means are stretched between the plate 29L and the positions on the left and right sides of the column 35L on the base portion 33L of the U-shaped member 32L. It is installed. An upward biasing force is applied to the U-shaped member 32L by the two helical springs 50LL and 50LC. As shown in FIG. 5, when a fish is placed on the fish mounting tray 20, the fish mounting tray 20 and the U-shaped member 32 </ b> L that supports the fish mounting tray 20 are moved downward against the urging forces of the helical springs 50LL and 50LC. It moves to (arrow A direction of FIG. 5), and the connection part of the support | pillar 35L and the housing | casing 45L in the U-shaped member 32L is pulled down. As a result, the housing 45L swings downward with the connection portion with the convex portion 48L on the rear surface 17 as a fulcrum, and the portion of the needle 22L exposed outside the housing 11 moves downward along the long hole 21L (see FIG. 5). Move in the direction of arrow A ').

  As shown in FIG. 2, the U-shaped member 32R of the second support mechanism 31R includes a base portion 33R extending in the left-right direction and leg portions extending upward from the left and right ends of the base portion 33R. 34RC and 34RR. The leg portions 34RC and 34RR extend to a position slightly below the upper surface 14 of the housing 11. In the middle between the leg portions 34RC and 34RR on the base portion 33R of the U-shaped member 32R, there is a column 35R having a height H1. The front ends of parallel link members 40RC and 41RC spaced apart in the vertical direction are pivotally attached (connected by shafts 1RC and 2RC) to the inside of the leg 34RC of the U-shaped member 32R. The front end portions of parallel link members 40RR and 41RR spaced in the vertical direction are pivotally attached (connected by shafts 1RR and 2RR) inside the leg portion 34RR of the U-shaped member 32R. As shown in FIGS. 2 and 4, an annular weight mounting plate 30 is fixed around the support 35 </ b> R on the base portion 33 </ b> R of the U-shaped member 32 </ b> R.

  Further, as shown in FIG. 4, the rear end portions of the parallel link members 40RR and 41RR are pivotally attached (connected by shafts 3RR and 3RR) to the convex portions 46RR and 47RR inside the rear surface 17 of the housing 11. The rear end portions of the parallel link members 40RC and 41RC are pivotally connected to the convex portions 46RC (not shown) and 47RC (not shown) inside the rear surface 17 of the housing 11 by shafts 3RC (not shown) and 4RC (not shown). ) A convex portion 48R is provided at a position slightly above the middle between the convex portions 47RC and 47RR inside the rear surface 17 of the housing 11. One end of a housing 45R having a dimension of length L1 is pivotally attached (connected by a shaft 5R) to the convex portion 48R. The housing 45R extends obliquely forward and upward from a connecting portion with the convex portion 48R. A portion of the housing 45R that is separated from the connection portion with the convex portion 48R by a distance L2 is pivotally attached (connected by a shaft 6R) to the upper end of the column 35R. As shown in FIG. 2, a housing 39 is fixed to the other end of the housing 45R. The housing 39 extends leftward from the connecting portion with the housing 45R, and the tip of the housing 39 reaches a position where the long hole 21R is present in the front surface 16. The proximal end portion of the needle 22R is fixed to the distal end of the housing 39.

  In addition, as shown in FIG. 2, there are two vines that serve as second urging means between the plate 29R and the left and right positions of the column 35R on the base portion 33R of the U-shaped member 32R. Winding springs 50RC and 50RR are stretched. An upward biasing force is applied to the U-shaped member 32R by the two helical springs 50RC and 50RR. As shown in FIG. 6, when the weight 51 is placed on the weight mounting tray 30, the weight mounting tray 30 and the U-shaped member 32R that supports the weight mounting tray 30 move against the urging forces of the helical springs 50RC and 50RR. It moves to a direction (arrow A direction of FIG. 6), and the connection part of the support | pillar 35R and the housing 39 in the U-shaped member 32R is pulled down. As a result, the casing 39 swings downward with the connection portion with the convex portion 48R on the rear surface 17 as a fulcrum, and the portion of the needle 22R exposed outside the housing 11 moves downward along the elongated hole 21R (FIG. 6). Move in the direction of arrow A ').

The above is the details of the configuration of the present embodiment. According to this embodiment, the following effects can be obtained.
First, in the present embodiment, the first support mechanism 31L supports the fish placing plate 20 and the needle 22L so that they can move in conjunction with the vertical direction, and is the first biasing means. The helical springs 50LL and 50LC apply an upward biasing force to the member 32L that supports the fish placing tray 20 in the first support mechanism 31L. Further, the second support mechanism 31R supports the weight mounting plate 30 and the needle 22R so that they can move in conjunction with the vertical direction, and the helical springs 50RC and 50RR as the second urging means are provided. An upward biasing force is applied to the member 32R that supports the weight mounting tray 30 in the second support mechanism 31R. For this reason, when a weight 51 having a mass (5 kg) corresponding to the target weight is placed on the weight placing plate 30 and a fish to be weighed is placed on the fish placing plate 20, the acceleration X * a applied to the weight 51 and the fish. (Acceleration from a direction different from the vertical direction due to ship shake) is always equal. Therefore, according to this embodiment, it is possible to accurately measure whether the fish placed on the fish placing plate 20 is heavier or lighter than the weight 51 placed on the weight placing plate 30 regardless of whether the ship is shaking.

  Secondly, in the present embodiment, the front surface 16 of the housing 11 is provided with two long holes 21L and 21R that are spaced apart in the left-right direction, and the needles 22L and 22R pass through the two long holes 21L and 21R, respectively. And exposed to the outside, and the exposed portions extend in opposite directions. Therefore, according to the present embodiment, the positional relationship between the needles 22L and 22R in the vertical direction can be easily understood.

  Thirdly, in the present embodiment, the winding springs 50LL and 50LC are stretched between the plate 29L connected to the upper surface 14 of the housing 11 and the member 32L that supports the fish placing tray 20, and the housing 11 Winding springs 50RC and 50RR are stretched between a plate 29R connected to the upper surface 14 of the body 11 and a member 32R that supports the weight mounting tray 30. In this embodiment, the vertical positions of the plates 29L and 29R can be adjusted by operating the operating elements 26L and 26R serving as adjusting means. Therefore, according to the present embodiment, the helical springs 50LL, 50LC, 50RC, and 50RR are deteriorated, and the positions of the needles 22L and 22R in a state where nothing is placed on the fish mounting tray 20 and the weight mounting tray 30 are “ Even when the position deviates from the character “−0−”, these positions can be used according to the character “−0−”. Therefore, the service life of the fish weighing device 10 can be extended.

Fourth, in the present embodiment, one end of a housing 45L having a length L1 is pivotally attached to the convex portion 48L of the rear surface 17 of the housing 11, and the convex portion 48L in the housing 45L The portion separated from the connecting portion by the distance L2 is pivotally attached to the upper end of the support 35L in the U-shaped member 32L. In addition, one end of a housing 45R having a length L1 is pivotally attached to the convex portion 48R of the rear surface 17 of the housing 11, and only a distance L2 from a connecting portion of the housing 45R with the convex portion 48R. The separated portion is pivotally attached to the upper end of the support 35R in the U-shaped member 32R. In the present embodiment, since the relationship between the length L1 and the distance L2 is L1 / 2> L2, these members 32L, 32R, 45L, and 45R set the displacement amounts of the needles 22L and 22R based on the lever principle. It operates as a displacement amplification mechanism that amplifies. To elaborate on this effect, in the present embodiment, for example, if the coupling point Saotai 45L and strut 35L is displaced in the downward direction by L _Z by the weight of the fish placed in fish mounting置皿20, needle 22L is displaced by a distance _{L Z (L1-L2) /} L2 multiplied to the amount of displacement _{L Z} the (L1-L2) / L2. Therefore, according to the present embodiment, the displacement amounts of the needles 22L and 22R are larger than the expansion and contraction amounts of the helical springs 50LL and 50LC. Therefore, according to the present embodiment, the difference between the weight of the fish and the target weight is confirmed even when the rigid helical springs 50LL, 50LC, 50RC, and 50RR that can suppress the chatter of the needles 22L and 22R are mounted. Can be made easier.

  Fifth, in the present embodiment, a drain port 18 is provided on the right surface 13 which is one surface of the housing 11, and an inclination from the left surface 12 to the right surface 13 is provided on the bottom of the housing 11. Therefore, it is possible to prevent the occurrence of a situation in which water that has entered the housing 11 from the holes 25LL and 25LC of the housing 11 stays in the housing 11 and rusts the housing 11.

  Sixth, in this embodiment, a non-slip rubber sheet 19 is attached to the bottom of the lower surface 15 of the housing 11. Therefore, according to this embodiment, it is possible to prevent the occurrence of a situation in which the fish weighing device 10 placed on the deck of the ship moves due to salt water entering the deck or the shaking of the ship and cannot perform the weighing work. .

Second Embodiment
Next, a second embodiment of the present invention will be described. FIG. 7 is a side sectional view of the fish weighing apparatus 10A according to the second embodiment of the present invention, viewed from the right side with the middle of the left surface 12 and the right surface 13 as a cut surface. In FIG. 7, the same components as those of the fish weighing device 10 are denoted by the same reference numerals, and description thereof will not be repeated. This fish weighing apparatus 10A is configured such that a rack (linear gear) 70L, gears 71L and 72L, and a rack (linear gear) 73L are interposed between the housing 45L and the needle 22L in the first embodiment. In the present embodiment, these members 70L, 71L, 72L, and 73L, the casing 45L, and the U-shaped member 32L constitute a displacement amount amplification mechanism. More specifically, the gears 71L and 72L in the fish weighing device 10A are fixed side by side on the left and right below the tip of the housing 45L. The two gears 71L and 72L share the rotation axis. The magnitude relationship between the diameter D1 of the gear 71L and the diameter D2 of the gear 72L is D1 <D2. The upper end of the rack 70L is fixed to the tip of the housing 45L. The teeth of the rack 70L mesh with the teeth of the gear 71L. Further, rails (not shown) are provided on the peripheral walls facing the left and right of the long hole 21L of the fish weighing device 10. The rack 73L is fitted into the rail so that it can slide on the rail of the long hole 21L. The teeth of the rack 73L face the inside of the housing 11. The teeth of the rack 73L mesh with the gear 72L. Further, the proximal end portion of the needle 22L is fixed to the surface of the rack 73L opposite to the toothed side.

  The above is the details of the configuration of the present embodiment. In this embodiment, when a fish is placed on the fish placing plate 20, the fish placing plate 20 and the U-shaped member 32L that supports the fish placing plate 20 are moved downwardly against the urging forces of the helical springs 50LL and 50LC (see FIG. 7 in the direction of arrow A), the housing 45L swings downward with the connecting portion with the convex portion 48L on the rear surface 17 as a fulcrum, and a rack (linear gear) 70L fixed to the tip of the housing 45L moves downward. When the rack (linear gear) 70L moves downward, the gears 71L and 72L rotate in the counterclockwise direction (in the direction of arrow B in FIG. 7), and the rack 73L and the needle 22L fixed thereto are downward (see FIG. 7) (in the direction of arrow A ′). In this embodiment, the displacement of the needle 22L is further amplified by the difference between the diameter D1 of the gear 71L and the diameter D2 of the gear 72L. Therefore, according to the present embodiment, the difference between the fish weight and the target weight can be easily confirmed.

<Third Embodiment>
Next, a third embodiment of the present invention will be described. FIG. 8 is a side sectional view of the fish weighing apparatus 10B according to the third embodiment of the present invention viewed from the right side with the middle of the left surface 12 and the right surface 13 as a cut surface. In FIG. 8, the same components as those of the fish weighing device 10 are denoted by the same reference numerals, and description thereof will not be repeated. This fish weighing device 10B is obtained by replacing the helical springs 50LL, 50LC, 50RC, 50RR in the first embodiment with an elastic body unit 80 that can be attached to and detached from the housing 11 ′. The case 81 of the elastic body unit 80 in the fish weighing device 10B has a cylindrical shape. An opening 83 extending in the vertical direction is formed in the peripheral side surface 82 of the case 8. Rails (not shown) are provided on the left and right peripheral walls of the opening 83. A receiving pin 85 having a convex portion 84 that protrudes in a triangular shape toward the outside of the case 81 is fitted into the rail of the opening 83. A screw hole 86 is provided in the center of the upper surface of the case 81. A screw 89 of a knob operator 88 is fitted into the screw hole 86. The upper end of the helical spring 92 is fixed to the lower end 91 of the screw 89 in the case 81. Further, the lower end of the helical spring 92 is fixed to the upper end of the portion of the receiving pin 85 protruding into the case 81. Further, a groove 93 that extends linearly from the rear end of the upper surface 14 ′ to the front is formed in the upper surface 14 ′ of the housing 11 ′ of the fish weighing device 10B. A rectangular opening 94 is provided on the rear surface 17 ′ of the housing 11 ′, and the opening 94 is covered with a door 95 that can be freely opened and closed.

  The U-shaped member 32L in the housing 11 'of the fish weighing device 10B is fitted between the left and right guide rails 96LL (not shown) and 96LC. The U-shaped member 32L and the fish placing plate 20 fixed thereto can move in the vertical direction along the guide rails 96LL (not shown) and 96LC. Further, a casing 97L extending in the front-rear direction is fixed to the lower end of the U-shaped member 32L, and the proximal end portion of the needle 21L is fixed to the front end of the casing 97L.

  In the present embodiment, the elastic body unit 80 is attached to the casing 11 'of the fish weighing device 10B as follows. First, the door 95 of the casing 11 'is opened to expose the opening 94 of the rear surface 17' of the casing 11 'to the outside. Next, the receiving pin 85 of the elastic body unit 80 is sufficiently pushed down. In this state, the elastic body unit 80 is accommodated in the housing 11 so that the screw 89 of the unit 80 is fitted in the groove 93 of the housing 11, and the rear end of the housing 97 </ b> L is formed on the convex portion 84 of the receiving pin 85. The force that pushes down the pin 85 after the hook is released is released. Thereby, the elasticity of the spring 92 of the elastic body unit 80 is converted into a force that lifts the rod 97L, the U-shaped member 32L connected thereto, and the fish placing plate 20 upward.

  The above is the details of the configuration of the present embodiment. According to this embodiment, the spring which is a member which deteriorates at the time of joining in the fish weighing device 10B can be replaced. Therefore, the fish weighing device 10B can be used semipermanently.

The first to third embodiments of the present invention have been described above. However, the following modifications may be added to such embodiments.
(1) In the first to third embodiments, the helical springs 50LL, 50LC, 50RC, 50RR may be replaced by an elastic body (for example, rubber) other than the spring.

(2) In the said 1st thru | or 3rd embodiment, the part exposed outside the housing | casing 11 in the needle | hook 22L, 22R extended in the direction which opposes. However, portions of the needles 22L and 22R exposed to the outside of the housing 11 may extend in the same direction (for example, the left direction).

(3) In the first and second embodiments, the heights of the plates 29L and 29R can be individually adjusted by the two knob operators 26L and 26R. However, only the height of one of the plates 29L and 29R may be adjusted.

(4) In the first and second embodiments, the casing 11 of the fish weighing device 10 has a hollow trapezoidal column shape. However, the housing 11 does not need to be hollow, and the internal mechanism may be exposed. Further, the left surface 12 and the right surface 13 of the housing 11 may have a shape different from a trapezoid, and the upper surface 14, the lower surface 15, the front surface 16, and the rear surface 17 may have a shape different from a rectangle. Further, the intersection angles of the left surface 12, the right surface 13, the upper surface 14, the lower surface 15, the front surface 16, and the rear surface 17 may be different from those of the first and second embodiments.

(5) In the first to third embodiments, the target weight is 5 kg and the characters “−0−” and “−5−” are written on the front surface 16. However, the target weight may be a value different from the 5 kg weight, and this value may be written instead of the character “−5-” on the front face 16.

(6) In the third embodiment, the case 81 of the elastic body unit 80 has a cylindrical shape. However, the case 81 may have a shape different from that of the cylinder. For example, the case 81 may be formed in a so-called bowl shape with a flat surface facing the casing 97L. In this way, it is possible to improve the meshing between the housing 97L and the receiving pin 85 when the elastic body unit 80 is mounted on the housing 11 'of the fish weighing device 10B.

(7) In the third embodiment, a displacement amount amplification mechanism (FIG. 7) similar to that of the fish weighing device 10B may be interposed between the rod body 97L and the needle 21L.

(8) In the said 1st thru | or 3rd embodiment, you may comprise the measuring device which uses things (for example, shellfish) other than fish as a measuring object. In addition, the weighing device according to the present invention may be used for measuring the weight of an object at a place other than on the ship where there is shaking.

DESCRIPTION OF SYMBOLS 10 ... Fish measuring apparatus, 11 ... Housing | casing, 12 ... Left side, 13 ... Right side, 14 ... Upper surface, 15 ... Lower surface, 16 ... Front surface, 17 ... Rear surface, 18 ... Drain outlet, 19 ... Anti-slip rubber sheet, 20 ... Fish Placement plate, 21 ... long hole, 22 ... needle, 23 ... cover, 24 ... hole, 25 ... screw hole, 26 ... picking operation element, 27 ... operation part, 28 ... screw part, 29 ... plate, 30 ... weight mounting Place plate, 31 ... support mechanism, 32 ... U-shaped member, 33 ... base, 34 ... leg, 35 ... column, 40, 41 ... parallel link member, 45 ... housing, 46, 47 ... convex part, 50: A helical spring.

Claims (4)

A housing,
An object placing tray on which a weighing object is placed;
A weight mounting tray on which a weight is placed;
A first needle partially exposed outside the housing, the exposed portion extending in the horizontal direction;
A second needle partially exposed outside the housing, the exposed portion extending in the horizontal direction;
A first support mechanism housed in the housing, the first support mechanism including a member for supporting the object placing plate and the first needle so that they can move in the vertical direction;
A second support mechanism housed in the housing, the second support mechanism including a member for supporting the weight mounting plate and the second needle so that they can move in the vertical direction;
First biasing means for applying an upward biasing force to a member that supports the object placing tray in the first support mechanism;
Second urging means for applying an upward urging force to a member that supports the weight mounting tray in the second support mechanism ,
Each of the first needle and the second needle has an arrow shape at one end, and one extends in the right direction and the other in the left direction, and is opposed to each other.
Even in a place with shaking, when a weight having a mass corresponding to a target weight is placed on the weight placing plate and the weighing object is placed on the object placing plate, the weight is added to the weighing object. Since the acceleration is equal, the configuration in which the first and second needles extend so as to face each other indicates whether the measurement object is heavier or lighter than the weight in the vertical direction. Measurement was possible from the positional relationship between the first needle and the second needle.
A weighing device characterized by that .   2. The measuring device according to claim 1, further comprising a displacement amount amplifying mechanism for amplifying the displacement amounts of the first needle and the second needle based on a lever principle. The front surface of the housing is provided with two long holes spaced in the left-right direction, each extending in the up-down direction, and the first needle and the second needle are the two The measuring device according to claim 1, wherein the measuring device is exposed outside the housing through each of the two long holes. According to claim 1, characterized by comprising a first and a second plate coupled to the upper surface of the casing, and adjusting means for adjusting the vertical position of said first and second plates Weighing equipment.