JP3932182B2 - Weighing inspection machine - Google Patents

Description

ここでは、秤量１２ｋｇの計量器Ａを例にして説明する。最初に、計量器Ａの電源をオンにすると、計量器Ａから機種識別信号が計測制御部８０に送られて来るので、計量器Ａの存在を確認するとともに、機種を識別する。
【００３６】
次に、分銅を全く搭載しない状態で、計量器Ａが正しく０ｇを表示しているかどうか、１回目の検査を行う。続いて、識別された機種に応じて、予め設定されている搭載すべき分銅を選択する。
【００３７】
次に、ステップモータ２４ｂに駆動パルスを送り、ステップモータ２４ｂを回転させて分銅群Ｂ２を徐々に下げていきながら、計量器Ａから送られて来る重量信号を監視する。すると、一番下段の分銅６４（５ｇ）が計量器Ａの上に当接し、続いて、分銅６４の連結部材８８の頭部９０が分銅６２の係止孔９２から浮動し、計量器Ａには一番下段の分銅６４のみが搭載される。このとき、計量器Ａから送られて来る重量信号は、分銅６４の重量分だけ急変し、分銅６４が計量器Ａに搭載されたことを知る。そこで、ステップモータ２４ｂを停止し、計量器Ａから送られて来る重量信号と、予め記憶している分銅６４の重量５ｇとを比較することにより、２回目の検査をする。
【００３８】
次に、再びステップモータ２４ｂに駆動パルスを送り、ステップモータ２４ｂを回転させて、分銅群Ｂ２を徐々に下げていきながら、計量器Ａから送られて来る重量信号を監視する。すると、分銅６４が分銅６２（４５ｇ）下面の凹部９４内に収容され、分銅６２の下面が計量器Ａの上に当接し、続いて、分銅６２の連結部材７４の頭部７６が分銅３０ａの係止孔７８から浮動し、計量器Ａには下から１、２段目の分銅６４、６２のみが搭載される。このとき、計量器Ａから送られて来る重量信号は、分銅６２の重量分だけ急変し、分銅６４及び６２が計量器Ａに搭載されたことを知る。
【００３９】
以下、同様に、ステップモータ２４ｂを回転させて、分銅群Ｂ２を徐々に下げていき、分銅３０ａ（９５０ｇ）及び３０ｂ（１ｋｇ）を計量器Ａに搭載すると、搭載された分銅重量の総和は５ｇ＋４５ｇ＋９５０ｇ＋１ｋｇ＝２ｋｇとなる。そこで、ステップモータ２４ｂを停止し、計量器Ａから送られて来る重量信号と、予め記憶している搭載した分銅の重量の総和２ｋｇとを比較することにより、３回目の検査をする。
【００４０】
次に、ステップモータ２４ｂを逆回転させて、分銅群Ｂ２を引き上げるとともに、ステップモータ２４ａを回転させて、分銅群Ｂ１を徐々に下げていき、分銅群Ｂ１の最下段の５ｋｇの分銅を計量器Ａに搭載して、４回目の検査を行う。
【００４１】
次に、５ｋｇの分銅を計量器Ａに搭載したまま、ステップモータ２４ｂを回転させて、分銅群Ｂ２を再び下げて、分銅群Ｂ２の全分銅６４、６２、３０ａ、３０ｂ（合計重量２ｋｇ）を計量器Ａに搭載すると、計量器Ａには合計７ｋｇの分銅が搭載される。そこで、計量器Ａの５回目の検査を行う。
【００４２】
次に、合計７ｋｇの分銅を計量器Ａに搭載したまま、ステップモータ２４ａを回転させて、分銅群Ｂ１を再び下げて、分銅群Ｂ１の下から２段目の分銅（５ｋｇ）を計量器Ａに搭載すると、計量器Ａには合計１２ｋｇの分銅が搭載される。そこで、計量器Ａの６回目の検査を行う。以上の無荷重から秤量までの６回の検査で、各測定値が許容誤差内であれば合格となる。
【００４３】
本実施例の計量検査機によれば、その他の秤量の計量器も同様に、無荷重から秤量までの６回の検査ができ、秤量１２ｋｇから秤量１０１ｋｇにわたる多種の計量器の検査が可能になる。
【００４４】
ここで、機種毎に計量器Ａの検査の前に、予め、各分銅群Ｂ１、Ｂ２を降下させて、検査すべき状態になるまでにステップモータ２４ａ、２４ｂに送った各駆動パルス数を記憶しておくと、計量器Ａを実際に検査をする際には、機種に応じて記憶した数の駆動パルスを両ステップモータ２４ａ、２４ｂに送ることにより、分銅群Ｂ１、Ｂ２を迅速に昇降させることができ、計量器Ａの検査時間の短縮を図ることができる。
【００４５】
本実施例の効果を列挙すると次のようなものである。（１）分銅３０ａは、計量器Ａに搭載される際、その下面に形成した凹部６０に下段に接続した分銅６４全体を完全に収容することにより、軽量小型の分銅６４の上に重い大形の分銅６０が載ることがない。したがって、軽量小型の分銅が変形して、分銅の位置ずれを生じさせ、検査不良を招くこともなくなるので、最下段に格別軽い分銅を接続することができ、１台の計量検査機で、従来より小秤量から大秤量にわたる多種の計量器の検査が可能になる。（２）重量用と軽量用の分銅群Ｂ１、Ｂ２を別個に備えたので、軽量小型の分銅の上に極端に重い大形の分銅が載ることがなくなり、前記（１）と同様に、１台の計量検査機で、従来より小秤量から大秤量にわたる多種の計量器の検査が可能になる。（３）重量用と軽量用の２つの分銅群Ｂ１、Ｂ２から計量器Ａに搭載する分銅を選択できるので、分銅の組み合わせがより多様化し、さらに多種の計量器の検査ができる。（４）分銅を２群に分けることにより、各分銅群Ｂ１、Ｂ２の分銅数が少なくなるので、従来より検査時間が短縮するうえ、各分銅群Ｂ１、Ｂ２の高さが短縮するので、分銅搭載時のバランスがよくなり、検査不良を招くことが少なくなる利点がある。（５）各分銅間の連結は、連結部材４０、７４、８８の逆台形状断面の頭部３８、７６、９０と係止孔４８、７８、９２の斜面との接触によるので、各分銅の横ぶれが抑制され、これにより、各分銅を計量器Ａへ静かに円滑に搭載でき、計量器Ａの測定値が短時間で得られ、検査時間の短縮が図れる。特に、横ぶれを起こし易い軽い分銅を搭載する場合に効果がある。
【００４６】
ところで、本発明は、前記実施例に限られるものではなく、種々の変更が可能である。たとえば、本実施例の計量検査機２０において、分銅の連結構造としては、図４に示したような従来の連結構造を用い、ステップモータ２４ａ、２４ｂの代わりに普通のモータを用いることも可能である。また、ある分銅３０ｄ、３０ａの凹部６０には、図１に示したように１つの分銅３０ｃのみを収容してもよいし、図２に示したように２つの分銅６２、６４を入れ子式に収容してもよいし、３つ以上の分銅を入れ子式に収容できるようにしてもよい。さらに、分銅群Ｂ１、Ｂ２の数は、前記実施例のように２つに限るものではなく、検査する計量器の秤量の範囲に応じて、３つ以上の分銅群を備えてもよいし、分銅群は１つのみとしてもよい。
【００４７】
【発明の効果】
以上の説明から明らかなように、請求項１に係る発明によれば、小型の基準分銅は真上の基準分銅の凹部に収容されつつ、ともに計量器に搭載されるので、軽量小型の分銅の上に重い大形の分銅が載ることがなくなり、これにより、軽量小型の分銅が変形して、基準分銅の位置ずれを生じさせ、検査不良を招くことがなくなる。したがって、従来よりも格別軽い分銅を連結することにより、１台の計量検査機で、従来より小秤量から大秤量にわたる多種の計量器の検査が可能になる。
【００４８】
請求項２に係る発明によれば、重量用と軽量用の分銅群を別個に備えたので、小型の基準分銅の上に極端に大形の基準分銅が載ることがなくなるうえ、２つの分銅群から計量器に搭載する分銅を選択できるので、分銅の組み合わせがより多様化し、請求項１に係る発明よりもいっそう多種の計量器の検査ができる。さらに、各分銅群の分銅数が少なくなるので、検査時間が短縮するうえ、各分銅群の高さも短縮するので、分銅搭載時のバランスがよくなり、検査不良を招くことが少なくなる利点がある。
【００４９】
請求項３に係る発明によれば、さらに、各分銅間の連結は、連結部材の逆台形状断面の頭部と係止孔の斜面との接触によるので、各分銅の横ぶれが抑制され、これにより、各分銅を計量器Ａへ静かに円滑に搭載でき、計量器Ａの測定値が短時間で得られ、検査時間の短縮が図れる。特に、横ぶれを起こし易い軽い分銅を搭載する場合に効果がある。
【図面の簡単な説明】
【図１】本発明の一実施例に係る計量検査機の概略を示す図である。
【図２】前記計量検査機に用いられるの軽量用の分銅群の縦断面図である。
【図３】従来の計量検査機の概略を示す図である。
【図４】前記従来の計量検査機における分銅の縦断面図である。
【符号の説明】
２０ 計量検査機
３０ａ−３０ｈ、６２、６４ 基準分銅
４０、７４、８８ 連結部材
３８、７６、９０ 頭部
４６、７２、８６ テーパ孔（斜面）
４８、７８、９２ 係止孔
６０、９４ 凹部
６１、９６ 天井
Ａ 計量器
Ｂ１ 重量用の第１基準分銅群
Ｂ２ 軽量用の第２基準分銅群[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a weighing inspection machine capable of mounting a reference weight suitable for various kinds of weighing instruments.
[0002]
[Prior art]
As shown in FIG. 3, the conventional weighing and inspection machine is provided with connecting members above and below the reference weights 1, 2 a and 2 b, and the reference weights are arranged in tandem. Are selected and mounted sequentially (see Japanese Utility Model Publication No. 58-831).
[0003]
These reference weights 1, 2a, and 2b are required to have corrosion resistance and non-deformability. In FIG. 3, the outer shapes are the same so as not to be displaced during mounting.
[0004]
As shown in FIG. 4, the connecting means is provided with a suspension hole 11 for suspension on the lower surface of each reference weight 1, and a protrusion 10 having a “T” cross section is fixed on each reference weight 1. By inserting the heads of the protrusions 10 into the locking holes 11, the reference weights are connected to each other.
[0005]
After mounting the reference weight 2b at the lowest level, after mounting it on the measuring instrument A, the reference weight 2a immediately above is slightly moved so that it does not get on the reference weight 2b, and the locking hole in the reference weight 2b 11 by lifting the protrusion 10 of the reference weight 2a in the inside.
[0006]
That is, the reference weight above the reference weight 2a is supported by the main body of the weighing inspection machine, and only the reference weight 2b is mounted on the measuring instrument A.
[0007]
The inspection of the measuring instrument is performed by comparing the weight of the reference weight 2b with the measured value and determining whether the error is within an allowable range.
[0008]
In recent scales, for example, digital scales, a wide variety of series products are available, ranging from weighing 5 g to weighing 200 kg. Weighing machines are also expected to be usable for these series products. Yes.
[0009]
[Problems to be solved by the invention]
In the above-described weighing inspection machine, since the weight of the reference weight is adjusted by the size of the locking hole 11 and the upper reference weight is added on the lower reference weight, a light reference weight having poor rigidity is used. It cannot be connected to a heavy reference weight, and requires several types of lightweight inspection machines according to weighing, such as for light weight, medium weight, and heavy weight.
[0011]
The present invention, all SANYO been made in order to solve the above problems, comprises a standard weight groups linked to a reference weight in tandem with the connecting member, the meter from lightweight calibration weight on the underside in weighing inspection machine to be mounted, it is an object to allow the rated separately lighter standard weight can be connected without any trouble.
[0012]
[Means for Solving the Problems]
Over the previous SL challenges, in the invention according to claim 1, comprising a reference weight groups linked to a reference weight in tandem with the connecting member, weighing inspection to be mounted on the meter from lightweight calibration weight on the underside In the machine
The above-mentioned lightweight reference weight is compactly formed according to the weight, and each reference weight is formed with a recess for receiving a small reference weight immediately below, and the ceiling of the recess is a latch for suspension. Holes are formed,
The connecting member is fixed on the small reference weight, and is provided with a head portion that is locked in the locking hole, and the small reference weight is accommodated in the concave portion of the reference weight directly above, and both are connected to the measuring instrument. It is mounted.
[0013]
According to the present invention, since the small reference weight is accommodated in the measuring instrument while being accommodated in the recess of the reference weight directly above, the small reference weight is not deformed and a desired light reference weight is connected. Thus, it can be used for a measuring instrument that is more versatile than before.
[0014]
The invention according to claim 2 is the invention according to claim 1, wherein, in addition to the reference weight group, a reference weight group for weight is separately arranged, and the reference weight to be mounted is from both reference weight groups. It is selected. The present invention can be used for a measuring instrument that is more versatile than the invention described in claim 1.
[0015]
請 Motomeko invention described in 3 is the invention according to claim 1 or 2, wherein the connecting member is a whole countersunk screw shape, the head of the section "inverted trapezoid", provided the reference weight The reference weights are on the same axis line, and are locked to the slopes of the locking holes having a cross-section "reverse trapezoidal shape". Since the head of the connecting member is in contact with the inclined surface of the engagement hole and is located on the same axis line, it is possible to suppress the lateral displacement of the reference weight to be mounted.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to FIGS.
[0017]
FIG. 1 is a diagram showing an outline of a weighing inspection machine according to an embodiment of the present invention. FIG. 2 shows a reference weight group (hereinafter simply referred to as “weight group”) in which a plurality of reference weights (hereinafter simply referred to as “weights”) are connected in series by connecting members in the weighing inspection machine. It is a longitudinal cross-sectional view which shows the detailed structure of).
[0018]
The weighing inspection machine 20 of this embodiment includes two step motors 24 a and 24 b on a frame 22. Jacks 26a and 26b are connected to the step motors 24a and 24b, and rods 25a and 25b are screwed into the jacks 26a and 26b so that the rods 25a and 25b can be raised and lowered by the rotation of the step motors 24a and 24b. It is. The step motor rotates by a certain angle every time one driving pulse is inputted, and reverses by a certain angle every time one driving pulse having a reverse polarity is inputted.
[0019]
Weight suspensions 27 and 29 are connected to the lower ends of the rods 25a and 25b. A weight first weight group B1 in which a plurality of heavy weights 30e to 30h are connected in series is suspended on one weight suspension 27. Has been lowered. These weights 30e-30h are heavier on the upper side and lighter on the lower side, but weights of the same weight may be included. The other weight suspension 29 has a weight 30d that is lighter than the lowest weight 30e of the weight group B1 and a lighter second weight group B2 in which a lighter and smaller weight 30c is connected in series below the weight 30d. Hanging. A horizontal base 21 for placing the measuring instrument A under these weight groups B1 and B2 is provided.
[0020]
Each weight has a connecting member 40 having an inverted trapezoidal cross-section head portion 38 fixed to the upper surface, and a locking hole 48 having an inverted trapezoidal cross-section portion engaged with the head portion 38 of the connecting member 40 on the lower surface. . Each weight is connected by slidable locking between the connecting member 40 and the locking hole 48, and the head 38 of the connecting member 40 can float by sliding in the locking hole 48. .
[0021]
By the way, in the weight group B2, a recess 60 is provided on the lower surface of the upper weight 30d, and the head portion 38 of the connecting member 40 fixed to the upper surface of the lower weight 30c is engaged with the ceiling of the recess 60. A locking hole 48 is provided.
[0022]
After the weight group B2 is lowered and the lower weight 30c is mounted on the measuring instrument A, when the weight group B2 is further lowered, the lower weight 30c is accommodated in the recess 60 of the upper weight 30d, and the upper weight 30d directly contacts the upper surface of the measuring instrument A. For this reason, the upper heavy weight 30d does not rest on the lower light weight 30c.
[0023]
In FIG. 1, the number of weights connected to each of the weight groups B <b> 1 and B <b> 2 is made smaller than actual for the sake of simplicity, but actually, the weight group B <b> 1 is the weight of the connecting member 40. 4 pieces of 5 kg weights, 4 pieces of 10 kg weights, and 2 pieces of 20 kg weights are connected from the lower side, and the weight group B2 includes the weight of the connecting member as shown in FIG. 4 weights 64, 62, 30a and 30b of 5g, 45g, 950g and 1kg are connected in cascade from the lower side. Of course, the number of weights connected to each weight group B1, B2 may be increased or decreased depending on the weighing of the measuring instrument to be inspected, or the weight of each weight may be changed. Good.
[0024]
Next, the detailed structure of each weight will be described based on a longitudinal sectional view showing the detailed structure of the lightweight weight group B2 shown in FIG. Since the structure of each weight of the weight group B1 for weight is substantially the same as that of the weight 30b of the weight group B2 for light weight, the description thereof is omitted.
[0025]
The weight 30 b connects the upper member 32 and the lower member 34 with screws 36. A connecting member 40 having a head portion 38 having an inverted trapezoidal cross section is screwed onto the upper surface of the upper member 32 of the weight 30b. The upper member 32 is provided with a fine adjustment weight insertion hole 50, and a screw 52 that closes the insertion hole 50 is screwed into the insertion hole 50.
[0026]
The lower member 34 of the weight 30b has a circular hole 42 opened on the upper surface, and a tapered hole (slope) 46 having an inverted trapezoidal cross section continuous with the circular hole 42 and opened on the lower surface. The diameter of the circular hole 42 is larger than the diameter of the head portion 38 of the connecting member 40, and the diameter of the lower portion of the tapered hole 46 is made smaller than the diameter of the head portion 38 of the connecting member 40. A locking hole 48 for locking the head portion 38 of the connecting member 40 is formed from the tapered hole 46 and the circular hole 42.
[0027]
When the upper member 32 and the lower member 34 of the weight 30b are joined, the connecting member 40 of the lower weight 30a is engaged with the locking hole 48 of the lower member 34, and then the upper member 32 and The lower member 34 is coupled with a screw 36. Thus, when both the weights 30a and 30d are connected in series, the head portion 38 of the connecting member 40 can slide in the locking hole 48 and float from the tapered hole 48.
[0028]
Since the weight hanging tool 29 is basically configured in the same manner as the weight 30b, description of this structure is omitted. However, the locking hole 29e for locking the connecting member 40 of the uppermost weight 30b is composed of a circular hole 29c formed in the upper member 29a and a tapered hole (slope) 29d formed in the lower member 29b. Is done.
[0029]
When the weight hanging tool 29 is lifted, the head portion 38 of the connecting member 40 of the lower weight 30a is connected to the upper weight 30b in accordance with the upward movement of the upper weight 30b at the connection portion between the two weights 30a and 30b. The lower weight 30 is also lifted simultaneously. On the contrary, when the weight hanging tool 29 is lowered, the lower weight 30a is mounted on the measuring instrument A, and then the head portion 38 of the connecting member 40 of the lower weight 30a is connected to the tapered hole 46 of the upper weight 30b. The weights 30a and 30b are disconnected from each other, and only the weights of the weight 30a or less can be mounted on the measuring instrument A.
[0030]
The weight 30 a is provided with a recess 60 on the lower surface, and the entire weight 62 connected to the lower stage can be accommodated in the recess 60. The upper member 66 and the lower member 68 are coupled by a screw 36, and a connecting member 40 having a head portion 38 having an inverted trapezoidal cross section is screwed onto the upper surface of the upper member 66, and fine adjustment is performed on the side surface of the upper member 66. The weight insertion hole 50 and the screw 52 are screwed into the weight insertion hole 50 are the same as the weight 30b. However, the detailed structure is as follows.
[0031]
A circular hole 70 is formed in the lower surface of the upper member 66 of the weight 30a. The lower member 68 of the weight 30a is provided with a concave portion 60 that can completely accommodate the entire lower weight 62 on the lower surface, and has an inverted trapezoidal cross section that is continuous with the circular hole 70 in the ceiling 61 of the concave portion 60 and opens on the lower surface. The taper hole (slope) 72 is provided. A locking hole 78 is formed from the circular hole 70 and the taper hole 72 to lock the head portion 76 of the connecting member 74 fixed to the lower weight 62.
[0032]
As shown in FIG. 2, the weight 62 connects the upper member 80 and the lower member 82 with screws 36. The upper member 80 is a flat disk, and a connecting member 74 having a head 76 having an inverted trapezoidal cross section is screwed from above. The lower member 68 of the weight 62 is provided with a circular hole 84 on the upper surface and a concave portion 94 that can completely accommodate the lower weight 64 on the lower surface. The ceiling 96 of the concave portion 94 has a circular hole 84 and A tapered hole (slope) 86 having an inverted trapezoidal cross section that is continuous and opened on the lower surface is provided. The circular hole 84 and the tapered hole 86 form a locking hole 92 that locks the head 90 of the connecting member 88 fixed to the lower weight 64.
[0033]
The lowermost weight 64 is a flat disk and has a simple structure in which the connecting member 88 is screwed from above. For this reason, this weight 64 is easy to manufacture and can be particularly lightweight and compact.
[0034]
This weighing inspection record 20 sends drive pulses to the stepping motors 24a and 24b, receives a weight signal from the weighing instrument A, checks whether the measured value is within the allowable error range, records the inspection result, and displays the display result. And a measurement control unit (personal computer) 80 for displaying and printing. Next, the operation of the measurement control unit 80 when inspecting the measuring instrument A will be described.
[0035]
The inspection of the measuring instrument A is usually performed six times by changing the total weight of the weights to be mounted as follows according to the weighing of the measuring instrument A.

Here, an explanation will be given by taking an example of a measuring instrument A having a weighing of 12 kg. First, when the power of the measuring instrument A is turned on, a model identification signal is sent from the measuring instrument A to the measurement control unit 80, so that the presence of the measuring instrument A is confirmed and the model is identified.
[0036]
Next, a first inspection is performed to determine whether the measuring instrument A correctly displays 0 g in a state where no weight is mounted. Subsequently, a preset weight to be mounted is selected according to the identified model.
[0037]
Next, a drive pulse is sent to the step motor 24b, and the weight signal sent from the measuring instrument A is monitored while the step motor 24b is rotated to gradually lower the weight group B2. Then, the weight 64 (5 g) in the lowermost stage abuts on the measuring instrument A, and then the head 90 of the connecting member 88 of the weight 64 floats from the locking hole 92 of the weight 62, and enters the measuring instrument A. Only the bottom weight 64 is mounted. At this time, the weight signal sent from the measuring instrument A changes abruptly by the weight of the weight 64 and knows that the weight 64 is mounted on the measuring instrument A. Therefore, the step motor 24b is stopped, and a second inspection is performed by comparing the weight signal sent from the measuring instrument A with the weight 5g of the weight 64 stored in advance.
[0038]
Next, a drive pulse is sent to the step motor 24b again, the step motor 24b is rotated, and the weight signal sent from the measuring instrument A is monitored while the weight group B2 is gradually lowered. Then, the weight 64 is accommodated in the recess 94 on the lower surface of the weight 62 (45 g), the lower surface of the weight 62 abuts on the measuring instrument A, and then the head 76 of the connecting member 74 of the weight 62 is the weight 30a. Floating from the locking hole 78, the weighing instrument A is loaded with only the first and second weights 64 and 62 from the bottom. At this time, the weight signal sent from the measuring instrument A changes abruptly by the weight of the weight 62 and knows that the weights 64 and 62 are mounted on the measuring instrument A.
[0039]
Similarly, when the step motor 24b is rotated to gradually lower the weight group B2 and the weights 30a (950g) and 30b (1kg) are mounted on the measuring instrument A, the total weight of the mounted weights is 5g + 45g + 950g + 1kg. = 2 kg. Therefore, the step motor 24b is stopped, and the third inspection is performed by comparing the weight signal sent from the measuring instrument A with the total weight 2 kg of the weights stored in advance.
[0040]
Next, the step motor 24b is rotated in the reverse direction to raise the weight group B2, and the step motor 24a is rotated to gradually lower the weight group B1, and the 5 kg weight at the lowest stage of the weight group B1 is measured. Installed in A and performs the fourth inspection.
[0041]
Next, with the 5 kg weight mounted on the measuring instrument A, the step motor 24b is rotated, the weight group B2 is lowered again, and the total weight 64, 62, 30a, 30b (total weight 2 kg) of the weight group B2 is reduced. When mounted on the measuring instrument A, the measuring instrument A is loaded with a total weight of 7 kg. Therefore, the fifth inspection of the measuring instrument A is performed.
[0042]
Next, with the total weight of 7 kg mounted on the measuring instrument A, the step motor 24a is rotated, the weight group B1 is lowered again, and the second weight (5 kg) from the bottom of the weight group B1 is added to the measuring instrument A. When mounted on the measuring instrument A, a total weight of 12 kg is mounted on the measuring instrument A. Therefore, the sixth inspection of the measuring instrument A is performed. In the above six tests from no load to weighing, if each measured value is within an allowable error, it is acceptable.
[0043]
According to the weighing inspection machine of the present embodiment, the weighing instruments of other weighings can be similarly inspected six times from no load to weighing, and various kinds of weighing instruments ranging from weighing 12 kg to weighing 101 kg can be inspected. .
[0044]
Here, before inspecting the measuring instrument A for each model, the weight groups B1 and B2 are lowered in advance, and the number of drive pulses sent to the stepping motors 24a and 24b before being inspected is stored. Then, when actually inspecting the measuring instrument A, the weight groups B1 and B2 are moved up and down quickly by sending the number of drive pulses stored in accordance with the model to both step motors 24a and 24b. Therefore, the inspection time of the measuring instrument A can be shortened.
[0045]
The effects of the present embodiment are listed as follows. (1) When the weight 30a is mounted on the measuring instrument A, the weight 30a is large on the lightweight small weight 64 by completely accommodating the whole weight 64 connected to the lower stage in the recess 60 formed on the lower surface thereof. No weight 60 is placed. Therefore, the lightweight and small weight is deformed, causing the position of the weight to be displaced and causing no inspection failure. Therefore, an exceptionally light weight can be connected to the lowermost stage. A variety of measuring instruments ranging from a small scale to a large scale can be inspected. (2) Since the weight and light weight groups B1 and B2 are separately provided, an extremely heavy large weight is not placed on the light weight and small weight, and similarly to (1), 1 With a single weighing inspection machine, it is possible to inspect various types of measuring instruments ranging from small scales to large scales. (3) Since the weight mounted on the measuring instrument A can be selected from the two weight groups B1 and B2 for weight and light weight, the combination of weights can be further diversified, and various kinds of measuring instruments can be inspected. (4) By dividing the weights into two groups, the number of weights of each weight group B1, B2 is reduced, so that the inspection time is shortened compared to the prior art, and the height of each weight group B1, B2 is shortened. There is an advantage that the balance at the time of mounting is improved, and inspection failures are less likely to occur. (5) Since the connection between the weights is based on the contact between the heads 38, 76, 90 of the inverted trapezoidal cross section of the connecting members 40, 74, 88 and the inclined surfaces of the locking holes 48, 78, 92, Lateral movement is suppressed, whereby each weight can be smoothly and smoothly mounted on the measuring instrument A, the measured value of the measuring instrument A can be obtained in a short time, and the inspection time can be shortened. In particular, this is effective when a light weight that easily causes lateral shake is mounted.
[0046]
By the way, the present invention is not limited to the embodiments described above, and various modifications are possible. For example, in the weighing inspection machine 20 of the present embodiment, a conventional connection structure as shown in FIG. 4 is used as the weight connection structure, and an ordinary motor can be used instead of the step motors 24a and 24b. is there. Further, only one weight 30c may be accommodated in the recess 60 of a certain weight 30d, 30a as shown in FIG. 1, or two weights 62, 64 may be nested as shown in FIG. It may be accommodated, or three or more weights may be accommodated in a nested manner. Furthermore, the number of weight groups B1 and B2 is not limited to two as in the above embodiment, and may include three or more weight groups according to the range of weighing of the measuring instrument to be inspected, There may be only one weight group.
[0047]
【The invention's effect】
As apparent from the above description, according to the invention of claim 1, since the small reference weight is accommodated in the measuring instrument while being accommodated in the recess of the reference weight directly above, A heavy, large weight is not placed on the upper portion, whereby a light weight and a small weight are deformed, causing a positional deviation of the reference weight, thereby preventing an inspection failure. Therefore, by connecting a weight that is exceptionally lighter than the conventional one, it is possible to inspect various measuring instruments ranging from a small scale to a large scale with a single weighing inspection machine.
[0048]
According to the invention according to claim 2, since the weight and light weight groups are separately provided, an extremely large reference weight is not placed on the small reference weight , and two weight groups are provided. Since the weights to be mounted on the measuring instrument can be selected from the above, the combinations of weights are more diversified, and more various types of measuring instruments can be inspected than the invention according to claim 1. Furthermore, since the number of weights in each weight group is reduced, the inspection time is shortened, and the height of each weight group is also shortened, so that there is an advantage that the balance when the weight is mounted is improved and inspection failures are less likely to occur. .
[0049]
According to the invention according to claim 3, since the connection between the weights is due to the contact between the head of the inverted trapezoidal cross section of the connecting member and the slope of the locking hole, the lateral shake of each weight is suppressed, Thereby, each weight can be smoothly and smoothly mounted on the measuring instrument A, the measured value of the measuring instrument A can be obtained in a short time, and the inspection time can be shortened. In particular, this is effective when a light weight that easily causes lateral shake is mounted.
[Brief description of the drawings]
FIG. 1 is a diagram showing an outline of a weighing inspection machine according to an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view of a lightweight weight group used in the weighing inspection machine.
FIG. 3 is a diagram showing an outline of a conventional weighing inspection machine.
FIG. 4 is a longitudinal sectional view of a weight in the conventional weighing inspection machine.
[Explanation of symbols]
20 Weighing inspection machine 30a-30h, 62, 64 Reference weight 40, 74, 88 Connecting member 38, 76, 90 Head 46, 72, 86 Taper hole (slope)
48, 78, 92 Locking hole 60, 94 Recess 61, 96 Ceiling A Measuring instrument B1 First reference weight group B2 for weight Second reference weight group for light weight

Claims (3)

In a weighing inspection machine equipped with a reference weight group in which reference weights are connected in series using connecting members, and mounted on a measuring instrument from a lightweight reference weight at the bottom,
The above-mentioned lightweight reference weight is compactly formed according to the weight,
Each reference weight is formed with a recess for accommodating a small reference weight immediately below, and a suspension hole for suspension is formed on the ceiling of the recess,
While the connecting member is fixed on the small reference weight, a head that is locked to the locking hole is provided,
A weighing inspection machine characterized in that a small reference weight is housed in a recess of a reference weight directly above and is mounted on a measuring instrument. In addition to the reference weight set, it is separately arranged standard weight groups for weight, weighing testing machine according to claim 1, characterized in that the reference weight to be tower placement is selected from both the reference weight set . The connecting member is entirely in the shape of a countersunk screw, and the head of the cross section “inverted trapezoidal shape” is locked to the slope of the locking hole of the cross section “inverted trapezoidal shape” provided in the reference weight. The measuring and inspection machine according to claim 1 or 2, wherein are on the same axis line.

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