JP6403508B2 - Load amplification load device and load amplification load method - Google Patents

Description

  The present invention relates to a load amplification load device and a load amplification load method, and more particularly to a load amplification load device and a load amplification load method such as a load tester capable of loading a large load with high accuracy.

  As a load tester that applies a load to a load measuring instrument such as a load cell that can measure a large load, the load tester can be broadly classified as a so-called actual load tester that actually loads and tests the corresponding load weight (weight). , A load amplification type load tester equipped with a so-called booster mechanism that amplifies the load by lever or hydraulic pressure, and a known load cell (so-called master) that already knows the data when the load is applied Load cell) and a load tester of a so-called comparison method (build-up method) that directly connects and compares an unknown load cell or the like for which data when a load is applied on a test object is not yet measured.

  Since the load tester is a tester that measures force, it should be expressed by N (Newton), kN, and MN, which are units of force, but the load tester of the present invention is a weighing for transaction proof. Since a load cell used in a specific measuring instrument used in the apparatus is a main object to be tested, t (ton) which is a mass unit is used.

For example, the actual load tester has a maximum load of 1 t (tons) and can test with extremely high accuracy of 10 ⁻⁵ (1 / 100,000). Has been. However, when the load is in the unit of several tens of t, the actual load tester itself becomes very large (for example, the height is about 10 m or more). Therefore, when such an actual load tester is used as a load tester for a load cell used in a specific weighing instrument, for example, the place where the load cell to be tested is taken in and out is 90 cm or 1 m from the floor surface with good operability. If an attempt is made to set the height to a certain level, the construction cost becomes very high, such as the need to provide extremely deep pits, and a lot of labor and time are required for maintenance and inspection.

  Moreover, since the load tester of the comparison method (build-up method) uses a known load cell (so-called master load cell), the error that the known load cell has is included, and as a result, the measurement accuracy decreases. There are disadvantages (for example, the measurement accuracy is 1/2000).

  On the other hand, with a load amplification type load tester that amplifies the load with a kite or hydraulic pressure, the load is amplified, and the weight is smaller than that of an actual load tester that tests the same load. This makes it possible to reduce the size of an actual load testing machine. In addition, since a known load cell is not used, a relatively good measurement accuracy can be maintained although it is inferior to an actual load tester.

  However, since all of the load amplification type load testers amplify the load and act on the DUT, the hydraulic load tester has a temperature change in the environment where the load tester is installed. In addition, the amplification factor fluctuates depending on the area ratio of the piston, which is the square of the thermal expansion coefficient corresponding to the length, and as a result, the variation of the amplification factor may increase.

  On the other hand, in a load tester that amplifies the load with a kite (also called a saddle type load tester), the amplification factor is determined by the ratio of the distance between the power point from the fulcrum and the emphasis (also called the action point) When there is a temperature fluctuation, the amplification factor fluctuates by the thermal expansion coefficient itself, and the amplification factor is larger than that by which the amplification factor fluctuates by the area ratio of the piston that is the square of the thermal expansion coefficient as in the hydraulic type. Its fluctuating value is small. Further, if the entire bag is made of the same material, the length of the bag varies at the same rate. Therefore, when the temperature is stabilized, the amplification factor becomes the same as the original amplification factor. Even in the process of temperature fluctuation, the amplification factor does not fluctuate if the length of the ridge fluctuates at the same rate. As described above, the load tester using the scissors has an advantage that even if there is a temperature variation, the variation in the amplification factor is extremely small, and thus a highly accurate state can be maintained.

In addition, the saddle type load tester is disclosed in, for example, Patent Document 1 and the like, and includes a single saddle and a weight such as a weight. This saddle type load tester can obtain high accuracy sufficiently exceeding 10 ^-4 (1 / 10,000), and weights such as weights should be smaller than actual load tester. Therefore, it is possible to reduce the size of the actual load testing machine.

Japanese Patent Publication No. 61-44254

  As described above, the saddle type load tester has many advantages compared to other types of load testers. However, the scissors that can handle such a heavy load have a structure in which the blade and the blade rest come into contact with each other at the fulcrum, emphasis, and power point of the scissors (carbon tool steel or the like is used). A load of about 1.0 to 1.2 t / cm at maximum per blade length is considered to be a value that can maintain accuracy. For example, when the load capacity is 50 t, the length of the blade and the blade rest for operating this load capacity is required to be 40 centimeters, which is the maximum practical length that can maintain high accuracy. It is. On the other hand, when the load capacity is 100 t, the length of the blade and the blade receiver is required to be 80 centimeters, making it extremely difficult to put into practical use. Moreover, even if a blade or blade holder having such a length can be manufactured, there is a possibility that a part of the contact pressure of the blade or the blade holder may be lost, and in this case, the contact position is It becomes inaccurate and the accuracy decreases. Further, when amplified with one ridge at the final stage, the ridge itself becomes very large, and the length of the blade is not realistic.

  SUMMARY OF THE INVENTION The present invention solves the above problems, and a load amplification load device and a load amplification load method such as a saddle type load tester capable of applying a large load exceeding, for example, 50 t while maintaining high accuracy. Is intended to provide.

  In order to solve the above-described problems, the load amplification load device of the present invention amplifies a load of a weight of a known mass that has been heavily loaded and outputs it from a power point, and a load is applied to the force point of the weight booster. The component force means for transmitting the divided force and the component force divided by the component force means are respectively loaded with emphasis, and the component force is amplified and output from the force point to a plurality of paired component force multipliers. Force force, combined force means for combining the force output from the force points of the plurality of component force boosters, combined force transmission load means for transmitting the force combined by the resultant force means to the load load object and loading it, It is provided with.

  In addition, it is preferable that each saddle is provided with a blade and a blade support at its fulcrum, emphasis, and force point (at least its fulcrum and force point), and the load is applied to the load load object to measure the load. Although it is preferable that it is a measuring apparatus, it is not restricted to this. Moreover, it is preferable that the said component force means is a component force rod which divides | segments the input force into 2 parts, and the said force means is a resultant force ring which transmits the force input from two places together It is preferable.

  With this configuration, when the weight of the known mass is applied to the weight booster 槓桿, the load of the weight of the known mass is amplified by the weight booster 槓桿, and this amplified force is divided by the component force means. Acts on the emphasis of the component booster. Then, the component force is amplified by each component force booster て and output from the power point of each component force booster 力, and the force amplified by each component force booster で is combined by the resultant means and loaded on the load load object. Is done.

  In addition, the load amplification load method of the present invention divides the force obtained by amplifying the weight load, amplifies the divided force by a plurality of component force boosters, and combines the amplified forces to load load. It is characterized by loading an object.

  According to the load amplification load device and the load amplification load method, the force is divided by the component force means and amplified by acting on the emphasis of each component force booster. Only the force that is once divided and amplified acts, and the load amplified by each component force booster can be reduced. Thereby, for example, even when a large load such as 100 t is applied to the load load object, only a load of 50 t or less acts on the force point of each component force booster, and the fulcrum, the emphasis, the power point of the kite In this case, it is possible to adopt a component force booster having a structure with a practically usable length that can be brought into contact with each other between the blade and the blade receiver and can be up to 1.0 to 1.2 t / cm or less per blade length. , Can maintain a highly accurate state.

  Further, in the load amplification load device of the present invention, the resultant force means is connected to a force point of the paired component force boosting rods, and the resultant force means is supported so as to be movable up and down via a Roberval mechanism. It is characterized by that. With this configuration, the positions in the height direction of the force points of the component force boosters connected by the resultant force means, that is, the postures of the component force boosters can be made to coincide with each other via the resultant force means. , It becomes easy to stabilize both the component booster rods in a horizontal posture, and it becomes easy to maintain a highly accurate state. In addition, even when a force or moment that causes noise other than gravity is applied when the force is combined by the resultant force means, such a force or moment can be removed by the Roverval mechanism. Only the force loaded on the load object can be loaded on the load object, and the accuracy can be further improved.

  Further, the load amplification load device of the present invention loads the load load object corresponding to the inclination state detection means for detecting the inclination state of the weight booster and the inclination state detected by the inclination state detection means. And a correction means for correcting the load. With this configuration, even when the weight booster is tilted, it can be corrected so as to approach the load actually applied to the load object, and this can also improve the accuracy.

  Further, the load amplification load device of the present invention is characterized by comprising a horizontal control means for controlling the weight booster so that it is horizontal. According to this configuration, since the weight booster is controlled to be horizontal, tilting itself can be suppressed to a minimum, and as a result, accuracy can be improved.

  Further, the load amplification load device of the present invention is provided with a useless erasure rod capable of canceling a load other than the weight to be loaded on the load application object, and the use of the useless eyelashes other than the weight acting on the load load object. In addition to the balance weight for canceling the load, a platform on which a weight can be placed is provided.

  With this configuration, not only can the load other than the weight acting on the load object be canceled or adjusted, but also the load acting on the load object can be finely adjusted by placing a weight on the platform. It becomes possible.

  The load amplification load device of the present invention is characterized in that the weight booster is provided with a rest device that temporarily receives a load from the weight. According to this configuration, for example, when the load object is a load measuring device that measures a load, it is possible to perform a creep test satisfactorily by applying a large load to the load measuring device at once. Become.

In the load amplification loading method of the present invention, a load of a weight having a known mass is applied to the emphasis of the weight booster rod, and the weight booster connected in series with one or more primary levers or tertiary levers of this single rod. As component means for amplifying the load with the kite and dividing the amplified load, 2 ⁿ -1 component kites composed of the secondary levers (n is a positive integer of 1 or more) are arranged. Installed and divided ²ⁿ loads are applied to the emphasis of ²ⁿ large force booster rods, and the amplified load is applied to the blades and blade holders used for the component force booster rods. The load of each power point blade of two adjacent component force boosters is transmitted to the resultant ring as a resultant means, and the load is adjusted by the resultant ring. It is characterized by obtaining a large load and applying it to a load object.

In addition, the load amplification loading method of the present invention provides a fixed portion or a load of a load cell or a weighing device for a load load object to which a maximum load is applied in order to minimize the inclination of the bag caused by the load being applied. A hydraulic cylinder or an electric jack is provided between the transmission unit and a support frame fixed at a predetermined position, or between a plurality of fulcrum bases of a component force booster rod on which a large load acts and a frame that holds the fulcrum bases. A large load minute amount adjusting means capable of being displaced by a large load and a displacement amount control means for controlling the displacement amount is provided, and the displacement of the weight booster rod that causes the largest displacement at the time of loading is detected. The large load minute amount adjusting means is controlled so that the weight booster rod returns to the horizontal, and the rod system is held horizontally during the load test of each load.

  According to the present invention, after a load of a weight having a known mass is amplified by a weight booster, this force is divided by a force dividing means, and this component force is amplified by each of the provided component force boosters, Since these amplified forces are combined and applied to the load object, for example, a large load such as 100 t is applied to the object and the length that can be realized at the power point of each component booster Even when a structure in which the blade and the blade receiver are in contact with each other is adopted, the maximum length can be 1.0 to 1.2 t / cm or less per blade length, and a highly accurate state can be maintained. As a result, the load can be applied with high load and high accuracy. For example, even when the load load object is a load measuring device (load cell or scale) that measures the load, the load is high with high accuracy. The load measuring device can be tested with a large load and high accuracy.

  Further, by connecting the resultant force means to the force point of the paired component force booster rods and supporting the resultant force means so as to be movable up and down via a Roverval mechanism, the postures of the component force booster rods Can be made to coincide with each other, both the component force boosters can be easily stabilized in a horizontal posture, and a highly accurate state can be easily maintained, thereby improving reliability. In addition, even when a force or moment that causes noise other than gravity is applied when the force is combined by the resultant force means, such a force or moment can be removed by the Roverval mechanism, further improving accuracy. Can do.

  In addition, by providing an inclination state detecting means for detecting the inclination state of the weight booster rod and correcting it corresponding to the inclined state, even if the weight booster rod is inclined, the load load object is actually loaded. It can correct | amend so that it may be approaching the load currently performed, and an accuracy can also be improved by this.

  Further, by providing a horizontal control means for controlling the weight booster so that it is horizontal, it is possible to minimize the tilting of the weight booster itself, thereby improving the accuracy. .

  In addition, a waste weight scissors that can cancel a load other than the weight to be applied to the load load object is provided, and the waste weight scissors are provided with a balance weight for canceling a load other than the weight acting on the load load object. Separately, by providing a platform on which a weight can be placed, it is possible to finely adjust the load applied to the load object.

  Further, by providing a rest device that temporarily receives a load from the weight on the weight booster, for example, when the load load object is a load measuring device that measures the load, the load measuring device can be The creep test can be performed satisfactorily by applying a large load.

In the load amplification loading method of the present invention, a load of a weight having a known mass is applied to the emphasis of the weight booster rod, and the weight booster connected in series with one or more primary levers or tertiary levers of this single rod. As component means for amplifying the load with the kite and dividing the amplified load, 2 ⁿ -1 component kites composed of the secondary levers (n is a positive integer of 1 or more) are arranged. Installed and divided ²ⁿ loads are applied to the emphasis of ²ⁿ large force booster rods, and the amplified load is applied to the blades and blade holders used for the component force booster rods. The load of each power point blade of two adjacent component force boosters is transmitted to the resultant ring as a resultant means, and the load is adjusted by the resultant ring. It is characterized by obtaining a large load and applying it to a load object. As a result, a large load exceeding the limit of the contact load between the blade and the blade receiver can be accurately applied to the load object.

In addition, the load amplification loading method of the present invention provides a fixed portion or a load of a load cell or a weighing device for a load load object to which a maximum load is applied in order to minimize the inclination of the bag caused by the load being applied. A hydraulic cylinder or an electric jack is provided between the transmission unit and a support frame fixed at a predetermined position, or between a plurality of fulcrum bases of a component force booster rod on which a large load acts and a frame that holds the fulcrum bases. A large load minute amount adjusting means capable of being displaced by a large load and a displacement amount control means for controlling the displacement amount is provided, and the displacement of the weight booster rod that causes the largest displacement at the time of loading is detected. The large load minute amount adjusting means is controlled so that the weight booster rod returns to the horizontal, and the rod system is held horizontally during the load test of each load. As a result, the weight booster can be controlled horizontally and the accuracy can be further improved.

1 is an overall view of a load amplification load device (load tester) according to an embodiment of the present invention. It is a figure which shows the weight of the load amplification load apparatus, a weight booster, a component force, etc. It is sectional drawing which shows the weight of the load amplification load apparatus. It is a figure which shows the component force booster of the same load amplification load apparatus, a resultant force ring, a load load target object (test object), a resultant force transmission frame, a useless eraser. It is a perspective view which shows the weight of the load amplification load device, weight booster 槓桿, component force 槓桿, component force booster 合, resultant force ring, load load object, resultant force transmission frame, etc. FIG. 4 is a partially cutaway perspective view showing a component force booster and a resultant force ring of the load amplification load device. It is a principal part expansion notch perspective view of the resultant ring of the load amplification load apparatus. It is a figure which shows the component force booster of the same load amplification load apparatus, resultant force ring, resultant force transmission frame, etc. It is a figure which shows simply the load amplification load apparatus which concerns on other embodiment of this invention. It is a figure which shows simply the load amplification load apparatus which concerns on other embodiment of this invention. It is a perspective view which shows simply the scale (measuring device) etc. as a load load target object (test object). It is a figure which shows simply the load amplification load apparatus which concerns on other embodiment of this invention.

  Hereinafter, a load amplification load device according to an embodiment of the present invention will be described with reference to the drawings. Here, FIG. 1 is an overall configuration diagram showing an overall configuration of a load amplification load device (specifically, a load tester which is an example of the load amplification load device) according to an embodiment of the present invention. However, some components such as the component force booster in FIG. 1 are simply shown with their arrangement directions changed.

  As shown in FIG. 1, a load amplification load device (load tester) 1 according to an embodiment of the present invention is applied to its emphasis (a point where a load of a weight is acting and a point where a load is applied) 3b. A weight booster ３ (weight booster lever) 3 output from a force point (a point where force is applied to balance the weighted load) 3c by amplifying the load of the weight 2 with a known mass that is loaded, and a weight booster 槓桿The component force 槓桿 (component lever lever) 4 as a component force means that transmits the force applied to the three force points separately and the component force divided by the component force 槓桿 4 as the component force means are loaded with emphasis, respectively. And a pair of component force boosters 5 (5A, 5B) that amplify the component force and output from the power point, and these component force boosters 5 (5A, 5B) The resultant ring 6 as a resultant means for combining the forces output from the power points, Load application object a combined force by force ring 6 as a means is provided with a force transmission frame 8 as force transmitting load means for loading is transmitted to the (DUT) 7, and the like. Note that F in FIG. 1 indicates a floor surface (floor surface), and the component force booster 5 (5A, 5B) and the resultant ring 6 are disposed in the pit P dug downward from the floor surface F. Has been.

  As shown in FIGS. 1-3, the weight 2 consists of what is called chain weight which can connect and isolate | separate several types of weight 2a-2f of known mass which can be suspended sequentially. In this embodiment, as the weight 2, for example, three 100kg weights 2a, one 200kg weight 2b, one 250kg weight 2c, one 500kg weight 2d, one 750kg weight 2e are 1 Three 1t (1000 kg) weights 2f are provided. Each weight 2a-2f is attached in the state which can be isolate | separated and connected up and down via the coupling tool 11 etc. which can engage the weights 2a-2f up and down, as shown in FIG. 3 simply. The weight 2 (weights 2a to 2f) can be applied stepwise to the weight 3b of the weight booster 3 by the suspended body 12 suspended from the weight of the weight booster 3. As shown in FIG. 1 and FIG. 2, a lifting platform 14 that can be moved up and down by a screw jack 13 for a lifting platform is disposed below a weight 2 f that is disposed at the lowest position. It is comprised so that the load of the weights 2a-2f does not act on the suspension body 12 by making it raise to an upper limit position. Moreover, the total load (total 5t) of the weight 2 (weight 2a-2f) can be made to act on the suspension body 12 by lowering the raising / lowering stand 14 to a lower limit position. Moreover, the load of the weight 2 (weight 2a-2f) can be made to act on the suspension body 12 in steps (by making it load) by making the raising / lowering base 14 into the position between an upper limit position and a lower limit position. A position detector 15 that detects the vertical position of the lift 14 and an upper limit position sensor 16 and a lower limit position sensor 17 that detect that the lift 14 has reached the upper limit position and the lower limit position are also provided.

  As shown in FIGS. 1 and 2, the weight booster rod 3 is a single rod made of a primary lever having a fulcrum 3a between the point 3b and the force point 3c. A blade 20 disposed at a position serving as the fulcrum 3a is received from below by a blade receiver 23 fixed to a first standing frame 22 standing from a first support base 21. The weight 3b of the weight booster rod 3 on which the suspended body 12 is suspended is disposed at a location relatively distant from the fulcrum 3a on one end side of the weight booster rod 3, and in the vicinity of the weight 3b, A screw jack 24 and a jack driving motor 25 as a resting device capable of holding one end of the weight booster 3 from below are also provided. Although not shown, the weight 3b of the weight booster rod 3 is also configured to come into contact with the blade by the blade receiver, and the blade receiver assembled to the upper end portion of the suspended body 12 is provided on the booster rod 3 side. It is received with a blade.

  The weight booster 3 is provided with a force point 3c having a blade attached at a position relatively close to the fulcrum 3a on the other end side, and a connecting ring 27 with a blade receiver assembled thereto is locked to the force point 3c. ing. In this embodiment, the distance between the emphasis 3b and the fulcrum 3a is four times the distance between the force point 3c and the fulcrum 3a, and the load acting on the emphasis 3b is amplified four times so that the force point 3c. Is output from. Further, a balance weight 28 is attached to the other end portion of the weight booster 3 so that the weight booster 3 is in a substantially horizontal posture in a state where the load of the weight 2 is not applied at all.

  Further, in the vicinity of one end of the weight booster 3, there is an inclined state composed of a damper 26 for suppressing the vibration of the weight booster 3 and a differential transformer for detecting the inclination state of the weight booster 3. A detection sensor (inclination state detection means) 29 is provided, and the value of the load applied to the load object 7 is actually loaded corresponding to the inclination state detected by the inclination state detection sensor 29. Correction means for correcting the load value so as to approach the load value is provided in a control calculation unit (not shown) provided in the load amplification load device 1. Further, in the control calculation unit provided in the load amplification load device 1, the hydraulic cylinder 40 is arranged so that the weight booster rod 3 is horizontal as will be described later, corresponding to the tilt state detected by the tilt state detection sensor 29. Horizontal control means (not shown) is provided for controlling the amount of oil injected into the tank.

  A component ring 槓桿 (component lever) 4 as a component force means is connected to the connecting ring 27 locked to the force point 3 c of the weight booster rod 3 through a force transmission body 30 extending downward. A blade receiver 30 a is disposed at the lower end of the force transmission body 30. A blade 4 a whose blade tip faces downward is attached to a component force lever (component lever) 4 so as to come into contact with the blade receiver 30 a.

  The component force rod 4 has a line-symmetrical shape extending in the same dimension on both sides with a line passing through the portion engaged with the force transmission body 30 up and down, and has a blade 4c at one end and the other end. The component receiver 31 (31A, 31B) that transmits the force downward is locked by the blade receiver 31a. Accordingly, the component force transmission body 31 is connected to the component force transmission bodies 31 (31A, 31B) at positions that are line-symmetrical with respect to the point (the point 4b) engaged with the force transmission body 30. That is, the component force rod 4 as the component force means has a locking position with one component force transmission body 31 as a fulcrum 4a (or 4a '), an engagement point with the force transmission member 30 as an emphasis 4b, and the other It is a single rod made of a secondary lever whose locking position with the component force transmission body 31 is the force point 4a ′ (or 4a). Therefore, the load transmitted from the force point 3c of the weight booster 3 through the force transmitting body 30 is divided into ½ and transmitted to the component force transmitting body 31 (31A, 31B).

  As shown in FIGS. 1, 4, and 5, a connecting ring 32 is also attached to the lower end portion of each component force transmitting body 31, and each component force multiplier is attached to a blade receiver 32 a assembled to each connecting ring 32. The blade 5e of the force lever (component force booster lever) 5 (5A, 5B) is arranged so as to come into contact with the point 5b from above. Each component force booster 5 (5A, 5B) has a fulcrum assembled to the component force booster 5 on a downward blade holder 34 attached to the second support frame 33 disposed in the pit P. The blade 5d is brought into contact with the contact point as a fulcrum 5a, and the component force booster 5 (5A, 5B) is disposed in a swingable state. These component force boosters 5 (5A, 5B) are of the same structure, and are a single lever with a fulcrum 5a between the point 5b and the force point 5c. Therefore, the force point 5c of the component force booster 5 (5A, 5B) is provided in the direction opposite to the point 5b with the fulcrum 5a as the center. In this embodiment, the distance between the point 5b and the fulcrum 5a is five times the distance between the force point 5c and the fulcrum 5a, and the load acting on the point 5b is amplified five times. A component booster 5 (5A, 5B) output from the force point 5c is used. Moreover, as shown in FIGS. 4 and 6, a blade 35 having sufficient strength and length is assembled at the location of the force point 5c in the component force booster 5 (5A, 5B). The blade 35 provided at the force point 5c of the rod 5 (5A, 5B) is attached to the lower end portion of the amplified component transmission body 36 that transmits the amplified component force amplified by the component force booster rod 5 (5A, 5B). The assembled blade receiver 36a is received in a state of being contacted from above.

  In this embodiment, as shown in FIGS. 6 and 7, the blade receiver 36a has a blade receiver support portion 36b between two metal plate-like bodies 36c whose lower side is bifurcated. It is fixed to the blade receiving support portion 36b of the amplified component force transmitting body 36 that is disposed so as to be sandwiched and received from below. Further, the place where the blade 35 provided at the power point of the component force booster 5 (5A, 5B) (power point blade mounting portion 5d) is a component with a gap between the two metal plate-like bodies 36b. It is greatly extended on both sides of the booster rod 5 (the width direction of the component booster rod 5). And the blade 35 is each assembled | attached to two lower surfaces except the width direction center part of this power point blade attachment part 5d, and the length of the blade 35 or the blade receptacle 36a is comparatively short (for example, each The length of the blade 35 and the blade receiver 36a is 20 centimeters, and each component force booster 5 (5A, 5B) is 40 centimeters in total). Absent.

  The upper end portion of each amplified component force transmission body 36 is a round bar-shaped component force transmission pin that is rotatably inserted into the upper left and right of the main body portion 6a made of a thick metal plate provided in the resultant force ring 6 as a resultant force means. 6b. The resultant force ring 6 as a resultant force means is fitted to the main body 6a and the resultant force transmission pin 6c fixed to the center lower portion of the main body 6a, is processed so as to sandwich the main body 6a, and is integrated at the upper part. The resultant force output unit 6d. A resultant force transmission rod 37 is connected to the resultant force output portion 6d of the resultant force ring 6 in a posture extending upward. In the resultant force ring 6, the component force amplified by the component force booster 5 (5A, 5B) is transmitted to the main body portion 6a of the resultant force ring 6 via the component force transmission pin 6b, and the combined force is the resultant force. The force is transmitted from the transmission pin 6c and the resultant force output portion 6d to the resultant force transmission rod 37 side.

  With such a structure, the resultant force ring 6 is combined with the component force amplified by the component force booster 5 (5A, 5B). Here, as shown in FIGS. 6 is supported by the Roverval mechanism 45 so as to be movable up and down. In this embodiment, the central portion of the main body portion 6a of the resultant ring 6 is connected to a fixing bracket 47 attached to a fixed vertical frame 46 extending vertically at a predetermined location via parallel links 45a and 45b and connecting pins 45c to 45f. It is supported so that it can be raised and lowered. In other words, if the roval mechanism 45 is not provided, the resultant ring 6 is arranged in a posture that can swing around the resultant force transmission shaft 6c, but the resultant ring 6 (specifically, the resultant force output portion 6d of the resultant ring 6 or Since the main body portion 6a) is supported by the Roverval mechanism 45, the main body portion 6a does not swing, whereby the postures of the component force boosters 5A and 5B are held in the same manner, The booster rod 5 (5A, 5B) is configured to maintain a horizontal posture. Further, since the resultant force ring 6 is supported by the Roverval mechanism 45, only a load directly below from each component force booster 5 (5A, 5B) is good in a state in which the moment due to the unbalanced load is removed. And is transmitted to the resultant force transmission rod 37.

  As shown in FIGS. 1, 4, and 5, the upper end portion of the resultant force transmission rod 37 is coupled to the center of the lower side portion of the resultant force transmission frame 8 that is substantially rectangular in a side view, and is near the resultant force transmission frame 8. A resultant force transmission outer frame 39 extending further upward is arranged in such a posture as to surround the upper side region of the resultant force transmission frame 8 from the outside. The load application object (test object) 7 is disposed in a state of being sandwiched between the upper side portion of the resultant force transmission frame 8 and the lower side portion of the resultant force transmission outer frame 39. The upper side is supported by the hydraulic cylinder device 40 so as to be movable up and down. In this embodiment, the load application object (test object) 7 is a load measurement device that measures a load, and is a load cell that is used for business purposes and used as a specific measuring instrument.

  The hydraulic cylinder 40 is fixed to a main body portion in a state where the hydraulic cylinder 40 is mounted on a third fixed support frame (high fixed support frame) 41 corresponding to the second floor above the floor F having the same height as the ground surface. Has been. On the other hand, the place where the load object 7 is disposed is a space in the temperature-controlled room 42 provided on the floor F, and the temperature inside the temperature-controlled room 42 is maintained at an arbitrary temperature, or the temperature is increased or increased. It is configured to be controllable to be lowered. The hydraulic cylinder 40 can move the piston rod 40a up and down by a hydraulic pump 43 disposed adjacent to the hydraulic cylinder 40, and the piston rod 40a and the resultant force transmission outer frame 39 and the resultant force through the upper side portion of the resultant force transmission outer frame 39. The load object 7 attached to the transmission outer frame 39 can be moved up and down. Although not shown, a plurality of position detection sensors that detect the lift position of the resultant force transmission outer frame 39 that is lifted and lowered by the piston rod 40a, and a position sensor that detects that the upper limit position and the lower limit position have been reached are separately provided. . The hydraulic pump 43 can finely control the hydraulic pressure with respect to the hydraulic cylinder 40 by pulse driving.

  Further, above the third fixed support frame 41, a load other than the weight 2 acting on the load object 7 (a part of the weight of the component force booster 5 itself, the resultant ring 6 and the resultant force transmission frame 8). In order to cancel or adjust its own weight, etc., a waste awning 50 is provided. The waste burr 50 has a blade at a position serving as a fulcrum 50a of the waste burr 50a by a blade receiver 53 attached to a fourth fixed support frame 51 provided further above the third fixed support frame 41. A balance weight 52 for canceling or adjusting a load other than the weight 2 is attached to one end side (the left side in FIG. 4) of the useless eraser 50.

  Further, a blade 54 with the blade tip facing upward is attached to the other end side (emphasis) 50b of the useless eraser 50, and a lifting force transmitting member 55A extending downward is attached to a blade receiver 58 that contacts the blade 54 from above. , 55B are attached. The piston rod 40a of the hydraulic cylinder 40 is formed with a through hole penetrating along the axial direction, and the lifting force transmitting material 55B is a through hole formed in the support hole that supports the through hole and the hydraulic cylinder 40. The lower end 55b is attached to the lower surface of the upper side of the resultant force transmission frame 8 through a hole or the like. Then, the load of the balance weight 52 can act as a lifting force on the resultant force transmission frame 8 via the lifting force transmission member 55B. Further, in the state where the load of the weight 2 is not applied, the piston rod 40a of the hydraulic cylinder 40 is lowered while the load (lifting force) from the balance weight 52 is applied, as shown in FIG. The arrangement space H of the load load object 7 (that is, the space between the upper side portion of the resultant force transmission frame 8 and the resultant force transmission outer frame 39) can be widened, whereby the load load object 7 is easily arranged. And can be exchanged. In addition, a damper 56 that suppresses vibration of the useless awning rod 50 and an inclination state detection sensor 57 that detects the posture (inclination state) of the useless awning rod 50 are provided at the other end of the useless awning rod 50. ing. A plurality of hydraulic pumps 43 may be provided so that the posture of the kite can be quickly controlled horizontally when suddenly loaded with 100 t.

  In the above configuration, when mounting (setting) the load object 7 (test object), the hydraulic cylinder is in a state in which the load of the weight 2 is not applied to the other end of the weight booster 3. The resultant force transmission outer frame 39 is moved downward by lowering the 40 piston rods 40a. Thereby, as shown in FIG. 8, a space H in which the load object 7 can be mounted can be formed between the upper side portion of the resultant force transmission frame 8 and the lower side portion of the resultant force transmission outer frame 39.

  Thereafter, the load application object 7 (a load cell which is a test object in this embodiment) is mounted (set) between the upper side portion of the resultant force transmission frame 8 and the lower side portion of the resultant force transmission outer frame 39. Then, the piston rod 40 a of the hydraulic cylinder 40 is raised so that the upper side portion of the resultant force transmission frame 8 contacts the load load object 7 so that the initial load acts on the load load object 7.

  In addition, while maintaining the state where the load of the weight 2 is not applied to the other end of the weight booster 3, the weight booster 3 and the component booster 5 (5A, 5B) are horizontal. The hydraulic pressure of the hydraulic cylinder 40 is adjusted to adjust the height of the piston rod 40a. In addition, when the weight booster rod 3 is in a horizontal posture, the component force booster rod 5 (5A, 5B) is arranged so as to be horizontal. In this embodiment, the load of the weight 2 is amplified by a factor of 4 by the weight booster 槓桿 3, reduced to ½ by the component force 槓桿 4, and further reduced by 5 by the component booster 槓桿 5 (5A, 5B). It is the structure amplified twice. On the other hand, as the displacement, for example, when the hydraulic pressure of the hydraulic cylinder 40 is adjusted to raise the piston rod 40a by 1 mm, the resultant force transmission outer frame 39, the load load object 7, the resultant force transmission outer frame 39, the resultant force ring 6 and the respective components The power point 5c of the force booster 5 (5A, 5B) is also raised by 1 mm, and the power point 3c of each of the component force boosters 5 (5A, 5B) 5b, the component force 4 and the weight booster 3 is The weight 3b is lowered by 5 mm, and the weight 3b of the weight booster 3 is raised by 20 mm. That is, the dimension 20 times the height adjustment dimension of the piston rod 40a changes at the weight 3b of the weight booster 3 so that one end of the weight booster 3 provided with the weight 3b of the weight booster 3 is provided. The position of the vicinity is detected by the tilt state detection sensor 29, and the hydraulic pressure of the hydraulic cylinder 40 is adjusted so that the weight booster 3 can maintain the horizontal posture. Therefore, when the posture of the weight booster 3 is adjusted, the hydraulic pump 43 that feeds oil to the hydraulic cylinder 40 may be finely adjusted by pulse driving or the like. In addition, in this way, in a state where the weight booster rod 3 is horizontal, the waste eraser rod 50 is adjusted in advance so as to be in a horizontal posture.

  From this state, by gradually lowering the lifting platform 14 on which the weight 2 is placed, the load of the weight 2 (weights 2a to 2f) is loaded stepwise on the weight 3b of the weight booster 3. In each process in which the load of the weight 2 is sequentially applied, an increase in the load of the weight 2 causes an extension of the force transmission portion of each component that transmits the force. The posture of the force booster 槓桿 5 (5A, 5B) slightly varies. At this time, the posture of the weight booster 槓桿 3 is detected, and the weight booster 槓桿 3 and the component force booster 槓桿 5 (5A, The height of the piston rod 40a of the hydraulic cylinder 40 is adjusted as needed so that 5B) becomes horizontal. Further, the horizontal posture of the weight booster 3 or the component booster 5 (5A, 5B) is set to the hydraulic cylinder 40 as in the case where a large load is continuously applied for a long time (for example, when a creep test is performed). If the oil pressure cannot be maintained due to minute oil leakage from the hydraulic device, the load is corrected so as to approach the load actually applied to the load object 7 based on the inclined posture of the weight booster 3.

  The load of the weight 2 is amplified by the weight booster 3 (in this embodiment, it is amplified 4 times). Thereafter, the amplified load is divided by 1/2 by the component force 4. As a result, it is loaded on the emphasis 5b of each component booster 5 (5A, 5B). Then, the load divided into halves is amplified by each of the component force boosters 5 (5A, 5B) (in this embodiment, further amplified by 5 times). Thereafter, the loads amplified by the respective component force boosters 5 (5A, 5B) are combined by the resultant force ring 6 and loaded onto the load load object 7 through the resultant force transmission frame 8. Therefore, in this embodiment, when the load of the weight 2 of all the weights 2a to 2f is loaded, a load of 5t (5000 kg) is loaded on the weight 3b of the weight booster 3 and the load load object 7 Is loaded with a load of 100 t.

  According to the load amplification load device and the load amplification load method, the force is divided by the component force 4 as the component force means, and is amplified by acting on the point 5b of each component force booster 5 (5A, 5B). Therefore, only the force once divided and amplified acts on the force point 5c of each component force booster 5 (5A, 5B), and is amplified by each component force booster 5 (5A, 5B). The load itself can be reduced. Thus, for example, even when a large load such as 100 t is applied to the load object 7 such as a load cell as in the above embodiment, the force point 5c of each component force booster 5 (5A, 5B) , Only 50t load is applied. Therefore, as described above, the blade and the blade rest are in contact with each other at the fulcrum, the emphasis, and the power point of the weight booster 分 3, the component force 槓桿 4, and the component force booster 槓桿 5 (5A, 5B). Even when the maximum load is applied, by using, for example, a blade of 40 several centimeters and a blade support at the force point 5c of the component force booster 5 (5A, 5B), a maximum of 1.0 to It can be set to 1.2 t / cm or less. As a result, the component force booster 5 (5A, 5B) having a practical length structure can be adopted while a large load can be applied. As described above, the load load object 7 can accurately apply the load. Even in the case of a load cell (load measuring device) that performs measurement, a large load can be applied with high accuracy, and the load cell (load measuring device) can be tested with high load and high accuracy.

  Further, as described above, the resultant force ring 6 is supported so as to be movable up and down via the Roverval mechanism 45. Therefore, the position in the height direction of the power point of each of the component force boosters 5A and 5B connected to the resultant force ring 6 That is, the postures of the component force boosters 5 </ b> A and 5 </ b> B can be matched with each other via the resultant force ring 6. Thereby, it becomes easy to stabilize both the component force boosters 5A and 5B in the horizontal posture, and it becomes easy to maintain a highly accurate state, and the reliability is improved. Further, since the resultant force ring 6 as a resultant force means is supported so as to be movable up and down via the robust mechanism 45, a force or moment acting as noise other than gravity is applied when the forces are combined by the resultant force ring 6. Even in such a case, such a force or moment can be removed by the Roverval mechanism 45, and only the force applied in the vertical direction by being combined by the resultant force ring 6 can be loaded on the load object 7, thereby further improving the accuracy. It becomes possible.

  Further, according to the above configuration, even when the weight booster 3 is tilted, this tilt state is detected by the tilt state detection sensor (tilt state detection means) 29 and corresponds to the tilt state detected by the tilt state detection sensor 29. Thus, the value of the load applied to the load object 7 is corrected so as to approach the load value actually applied. This also improves the accuracy.

  Also, according to the above configuration, when the weight booster 3 is tilted, the tilted state is detected by the tilted state detection sensor (tilt state detecting means) 29, and the weight booster 3 is horizontal. The amount of oil to the hydraulic cylinder 40 is adjusted by the control means, and the position of the piston rod 40a of the hydraulic cylinder 40 is adjusted. As a result, even when the weight booster 3 is tilted, control is performed so that the weight booster 3 is in a horizontal posture. Therefore, it is possible to minimize the tilt of the weight booster 3 and the component booster 5 (5A, 5B). Therefore, the accuracy can be improved.

  In the above configuration, the weight booster 3 is provided with the screw jack 24 and the jack driving motor 25 as a resting device that temporarily receives the load from the weight 2. Thereby, for example, when performing a creep test that loads a large load at once (a short time such as within 60 seconds) on the load cell that is the load object 7, the weight 2 is loaded. One end of the weight booster 3 is temporarily held by the screw jack 24, and in this state, the lifting platform 14 on which the weight 2 is placed is lowered to the lower limit position. Then, by driving the jack driving motor 25 and lowering the screw jack 24, a large load can be applied to the booster rod 3 at a stretch. Further, the screw jack 24 is raised from the lowered state, and the one end side of the weight booster 3 is supported. As a result, a large load can be applied to the load cell that is the load object 7 at a stretch, or the load cell can be unloaded. Can be done. Even during this creep test, the position of the resultant force transmission outer frame 39 is quickly adjusted by the hydraulic cylinder 40 so that the weight booster 3 and the component force booster 5 (5A, 5B) are kept horizontal. However, a large amount of oil may be supplied in a short time by providing a plurality of hydraulic cylinders 40 and hydraulic pumps 43 so that the position of the resultant force transmission outer frame 39 can be quickly adjusted at this time.

Also, even if the blade or blade holder can withstand a heavy load (length), even if it is feasible, only the structure that connects the rods in series without dividing the load is used. In the end, you must use a kite that can be amplified to twice the force of the current component kite. Therefore, in order to be able to cope with a large bending moment, in terms of strength, the cross-sectional modulus of the ridge must be increased, at least twice in the width direction and ^2½ times in the height direction (root twice) ) Must be used. Furthermore, as a practical matter, it is often necessary to increase the length of the ridge, and it is necessary to consider the increase in bending moment and deflection of the ridge caused by this, so at least twice in the width direction and in the height direction. In addition, it is necessary to make a bag with a dimension of 2 ^1/2 times (root 2 times) or more. For this reason, the production cost becomes very expensive. Therefore, as a whole, for example, as described above, much cost and equipment are required as compared with the case where a pair of component force rods 5 each amplifying a force of 1/2 are provided. Space is required. That is, as described above, when the load that can be applied increases, as described above, by providing the component force booster 槓桿 that amplifies the divided force in parallel, a plurality of 槓桿 s are connected in series and amplified. As a result, downsizing can be achieved and an increase in manufacturing cost can be minimized.

  By the way, in general, including the load amplification load device 1 as the load amplification load device, in a load tester using an heel or an actual load tester, the load value to the load object 7 is in a small load range. Although it can be applied while changing the load stepwise in a relatively fine manner, the load is coarsely (largely) changed in the large load range. In the load amplification load device 1 in the above-described embodiment, in the small load range, the smallest 100 kg weights 2a are connected to each other, and the load load object 7 is stepwise in units of 2t that is 20 times 100 kg. Can load. On the other hand, in the large load range, by connecting the largest 1t weight 2f, it can only be roughly loaded in units of 20t at a time. Therefore, in the heavy load region, that is, it was not possible to perform the test by loading the load object 7 at a fine load (weight) interval.

  What improved this point is a load amplification load device (load tester) 60 shown in FIG. In the load amplification load device 60 according to this embodiment, a balance weight for canceling or adjusting a load other than the weight 2 is provided on one end side (power point) of the waste awning rod 50 as shown in FIG. In addition to 52, a platform 62 on which a relatively small weight 61 such as a weight 61a for hand placement can be placed is provided. It is configured to hang from one end side (power point) of the eraser 50. Except for the configuration in which the platform 62 and the like are added, the configuration is the same as that of the above-described embodiment, and the same reference numerals are given to the components having the same function.

  By configuring in this way, as a force for lifting the resultant force transmission frame 8 by an amount corresponding to the amplified force of the load of the small-mass weight 61 corresponding to the distance from the fulcrum of the platform 62 in the waste awning rod 50 As a result, the load applied to the load cell (load measuring device) as the load object 7 decreases. Therefore, for example, when the amplification factor at the point of emphasis when the place where the platform 62 of the useless pallet 50 is attached is a power point, the weight 61a of 20 kg is placed on the platform 62. Since the lifting force of 100 kg acts on the emphasis of the waste awning rod 50, the load cell is gradually changed in a small range of 100 kg even by a large load by placing the weight 61 a on the stage 62 in stages. Thus, it is possible to apply a load to the load object 7 such as a load cell, and it is possible to test and inspect the performance of the load object 7 such as a load cell with a large load. It is also possible to confirm the behavior of the load amplification load device 60 under a heavy load (confirmation that the contact between the blade and the blade receiver is in a good state), and to improve the reliability of the load amplification load device 60. It can also be confirmed well.

  Moreover, in the said embodiment, it has one component force rod 4, a pair of component force boosters 5 (5A, 5B), and one resultant force ring (synthesizing means) 6, and weight booster rod Although the case where the force from 3 is amplified in two parts and then combined is described, the present invention is not limited to this. That is, as schematically shown in FIG. 10, in this load amplification load device (load tester) 70, a component force rod (first component force rod) that divides the force from the weight booster rod 3 side into two parts. Two second component force rods 71 that further divide the force divided by the component force rod (first component force rod) 4 into two parts are connected downstream of 4, and the force divided into these four components Are each amplified by four (ie, two pairs) component force boosters 5 (5A to 5D). Then, two second resultant rings 73 for combining the forces amplified by the paired component force booster 5 (5A, 5B) and the component force booster 5 (5C, 5D) are provided. Are further combined by the resultant force ring (first resultant force ring) 6 and loaded onto the load object 7.

  According to this configuration, the force finally divided into four is amplified by two pairs (that is, four) of component force boosters 5 (5A to 5D). Also in the component force booster 5 (5A to 5D), by adopting a blade and a blade receiving structure having the same strength and length as the component force booster 5 of the above embodiment, the load application object 7 It is possible to realize a load amplification load device (load tester) 70 that can double the maximum load to be applied to the load, that is, can load 200 t.

  Further, in the above configuration, four third component force rods that further divide the force divided into four parts by the second component force rod 71 and force divided by the third component force rods are divided. 4 pairs of component force boosters to be amplified are provided, and the forces amplified by each component force booster are combined in the four third merging rings, and this force is further combined into two second merging rings. And the combined forces may be combined with one first merging ring (not shown). As a result, it is possible to realize a load amplification load device (load tester) capable of applying a maximum load twice that is applied to the load object, that is, 400 t.

  In any of the above embodiments, the case where the load of the weight 2 is amplified by the single weight booster 3 has been described, but the present invention is not limited to this. That is, a plurality of weight boosters may be connected in series and connected, and the force amplified by the weight booster connected at the most downstream may be divided by the component force and amplified by the component booster. In the above-described embodiment, the case where the weight booster 3 is composed of a single rod composed of a primary lever is described. However, the present invention is not limited to this. It may be composed of a single rod consisting of a lever between the emphasis and the fulcrum. In the above embodiment, the case where a chain weight is used as the weight 2 is described. However, the present invention is not limited to this. A weight of a known mass is placed on a platform that can be lifted and lowered by a Roverval mechanism, and this load is applied. You may comprise so that it may act on the priority of the weight booster 3. Further, an electric jack may be provided in place of the hydraulic cylinder 40 as a large load minute amount adjusting means capable of adjusting a minute amount displacement with a large load such as the hydraulic cylinder 40 for leveling the weight booster 3 or the like. Good.

  In the above-described embodiment, the case where the load object (object to be tested) 7 is a load cell that can accurately measure a large load and is used as a specific measuring instrument in a transaction business is described. . However, the present invention is not limited to this, and the load load object (test object) may be a load measuring device capable of measuring a large load, that is, a weighing device 80 including a so-called platform. As shown in FIG. 11, the weighing device 80 as a load-loading object measures the load of an object to be weighed 81 made of a roll-shaped steel plate having a diameter of about 2 m that is rolled and manufactured. An object to be weighed 81 is placed on a platform 82 provided on the weighing platform 82 and weighed. For example, the size of the mounting table 82 is a dimension in a plan view, the length is 4 m, the width is 1.5 m, and the weighing of the weighing device 80 is 100 t, for example.

  Such a weighing device 80, which is loaded with a large load despite the relatively small area of the platform 82, is used as a specific measuring instrument. It is conceivable that a steel plate or the like larger than the mounting table 82 is placed, and a heavy load or the like is placed on the steel plate. However, such a situation is very dangerous, and is therefore listed as an exclusion in the metrology law that does not need to be examined. However, it is desired that such a weighing device 80 is also tested and inspected by applying a large load with high accuracy.

  The load amplification load device 100 according to the present embodiment is configured to be able to load a load as a load load object (test object) even for such a weighing device 80. As schematically shown in FIG. 12, the load amplification load device 100 is supported in a state where it can be moved up and down by a Roverval mechanism 101, and has a platform 102 having a large area on which a large number of weights 103 having a known mass can be placed. The weight booster 104 that is loaded with the load from the platform 102 and is amplified from the power point and output, and the component force 槓桿 as a force dividing means that divides the force from the weight booster 104 into two parts. 105, a pair of component force boosters 106 (106A, 106B) coupled to the component force rod 105 via the component force transmission material 107 and amplifying the force divided by the component force rod 105, and each component A resultant ring 108 as a resultant force unit for combining the forces amplified by the force booster 106 (106A, 106B) and output from the force point 106c, and the resultant ring 108 are assembled at the upper end. Vignetting, the force is combined with the force ring 108, and a force transmitting load member 109 as force transmitting load means for loading is transmitted to the weighing device 80 as the load a load object (DUT). The component force booster 106 (106A, 106B) is provided on the front side and the back side of the upper portion of the resultant force transmission load material 109 on the paper surface of FIG. The component force transmission members 107 also have the same structure and length. Although not shown, blades and blade receiving structures are also used for the force point, fulcrum, and emphasis of the weight booster 104 and the component force booster 106 (106A, 106B).

  The platform 102 is supported by a support shaft 111 that is supported by the Roverval mechanism 101 so as to be movable up and down, and the weight transmission member 112 connected to the lower end of the support shaft 111 is weight boosted. It is connected to the point 104b of the bag 104. Then, the force other than the load applied to the platform 102 is removed by the roval mechanism 101, and only the load (downward load) from the platform 102 is favorably applied to the weight 104b of the weight booster 104. Has been. Further, the weight booster rod 104 is composed of a single rod made of a tertiary lever having a force point 104c between the point 104b and the fulcrum 104a, and the downward load applied to the point 104b is amplified, It is output as a downward load from the force point 104c.

  The component force rod 105 is loaded downward via a force transmission member 113 connected to the force point 104c of the weight booster rod 104, and the force acts on the component force rod 4 in the above embodiment. The direction is up and down, but the force from the force point 104c of the weight booster 104 is divided into two and transmitted to each component force booster 106 (106A, 106B). A single cage made of leverage.

  In the component force booster 106 (106A, 106B), the force divided by the component force trap 105 is amplified and output from the force point 106c of the component force booster 106 (106A, 106B), and these are amplified. The combined loads are combined by the resultant ring 108 and are applied to the weighing device 80 as a load object (test object) through the resultant force transmission load material 109. Here, in this embodiment, the resultant force transmission load material 109 is also supported by the robust mechanism 110 so as to be movable up and down, whereby the weighing device 80 serving as a load load object (test object) from the resultant force transmission load material 109 is supported. Only the load in the vertical direction is applied, and forces and moments other than the load applied to the resultant force transmission load material 109 are removed.

  This load amplification load device 100 can also apply a large load to the weighing device 80 (the platform 81 of the weighing device 80) with high accuracy and safety.

That is, the load amplification load device and the load amplification load method according to the present invention are summarized as follows.
The load of the known weight 2 is applied to the weight booster rods 3 and 104 by a method such as loading a weight on the platform 102 provided with the chain weights 2a to 2f or the Roverval mechanism 101, and the primary lever, Alternatively, the load is amplified by one or more weight boosters 3 and 104 connected in series, each of which is a single lever made of a tertiary lever. Then, as component means for dividing the amplified load, 2 ⁿ −1 component forces 4 and 105 each consisting of a single lever are arranged (n is a positive integer of 1 or more). . The divided ²ⁿ loads are applied to the emphasis of the component force boosters 5 and 106 made up of ²ⁿ large load rods of the same size. Here, the component force boosters 5 and 106 are constituted by a single lever or a primary lever. These ²ⁿ heavy load component boosters 5 and 106 are arranged in parallel at appropriate intervals. Here, the amplified load is set to be equal to or less than the maximum value (Wmax) of the load determined by the limitation of the contact load between the blade and the blade receiver used for the component force boosters 5 and 106.

Among the 2 ⁿ component load boosters 5 and 106 for large loads, the load of each of the force point blades of the adjacent two component force boosters 5 and 106 is transmitted to the resultant force rings 6 and 108 as a resultant means. Is done. When the component force boosters 5 and 106 are a pair, forces (loads) are combined in the resultant ring 6 and a large load with a maximum value of 2 Wmax can be obtained. In addition, when there are four (two pairs) component force boosters 5 adjacent to each other, there are two additional resultant rings 73 that combine the forces obtained by amplifying these component forces. It is possible to obtain a large load having a maximum value of 4 Wmax by providing a second-stage resultant ring 6 for adjusting the load. A maximum load of Wmax × ²ⁿ can be obtained by installing 2 ⁿ component force boosters for large loads in the same manner.

As described above, in order to obtain a maximum load that is 2, 4, 8,... Times the maximum value (Wmax) of the power point load determined by the limitation of the contact load between the blade and the blade holder used for the component force booster. In addition, 2 ⁿ -1 force distribution means composed of a component force rod are provided on one or a part of a weight booster rod connected in series to amplify the weight of a weight serving as a reference load with high accuracy. Te, after dividing the load, after obtaining the connected to component force booster槓桿for ^the 2 ⁿ large load in parallel arrangement of having the force point load (Wmax), the 2 ⁿ pieces (Wmax), (Wmax) × 2 by 2 ⁿ⁻¹ resultant rings 73 and 2 ⁿ⁻² second resultant rings, sequentially the third resultant ring, the fourth resultant ring,. A maximum load of ⁿ can be obtained. As a result, a large load that greatly exceeds the limit of the contact load between the blade and the blade receiver can be accurately applied to the load object.

  In addition, the heel (specifically, the blade line of the heel) tilts due to the deflection of the heel caused by the load being applied and the extension of each connecting member responsible for load transmission. In order to minimize this slope, A plurality of fulcrum bases of a component force booster acting on a load cell of a test object to which a load is applied, a fixed part or a load transmission part of a scale (measuring device) or a large load, and a frame for holding the fulcrum bases; In between, there is a large load minute amount adjusting means that can adjust the minute amount displacement with a large load, such as a hydraulic cylinder or an electric jack, and a displacement amount control means for controlling this displacement amount. Detecting the displacement of the saddle system (usually the weight booster that is loaded with a weight), and adjusting the amount of displacement to 0, that is, adjusting the heavy load minute amount adjusting means such as a hydraulic cylinder so that the saddle returns to the horizontal And your, is 槓桿 system held horizontally during load test each load, it is substantially permit load test by null method. As a result, the weight booster can be controlled horizontally and the accuracy can be further improved.

  In the above embodiment, the case where the component force boosters 5 and 106 are provided with blades and blade receivers capable of withstanding a large load of 50 t as a contact load as the load amplification load device has been described. However, due to restrictions due to the location of the load amplification load device and the environment in which it is used, it is possible to use blades and blade holders made of high-carbon steel that are susceptible to corrosion, for example, in locations where the metal is susceptible to corrosion. In this case, stainless steel, non-ferrous metal (ceramics, etc.) must be used as the material of the blade and blade receiver, and the contact load is greatly reduced (for example, about 1/10). However, even in such a case, since conventional stainless steel or non-ferrous metal (ceramics, etc.) must be used, even if the maximum load is about 5 tons, other than the material of the blade and blade holder By adopting the same structure as that of the present invention, it is possible to realize a load amplification load device and a load amplification load method that have a larger load and higher accuracy than the conventional one.

  Further, in the above embodiment, the load object is a load measuring device such as a load cell or a scale (metering device), and the load amplification load device tests the load measuring device as a test object. However, the present invention is not limited to this, and it is a matter of course that the load load object may be anything other than a load measuring device as long as a large load acts accurately.

1 Load amplification load device (load tester)
2 Weight 3 Weight booster (weight booster lever)
4 Component force (component force lever)
5, 5A to 5D component force booster (component force lever)
6 resultant force ring
7 Load object (test object)
8 resultant force transmission frame (resulting force transmission load means)
24 Screw jack (resting device)
29 Inclination state detection sensor (Inclination state detection means)
40 Hydraulic cylinder (Large load minute amount adjusting means)
43 Hydraulic pump 45 Roverval mechanism 50 Wasted burr 70 Load amplification load device (load tester)
71 component force (second component force)
73 Second resultant ring (synthetic means)
80 Weighing device (scale) (Loaded object)
DESCRIPTION OF SYMBOLS 100 Load amplification load apparatus 101 Roverval mechanism 102 Mounting stage 104 Weight booster 105 Component force １０６ 106, 106A, 106B Component force booster 108 Combined force ring 109 Combined force transmission load material

Claims (13)

A weight booster that amplifies the load of the weight of known mass that is loaded in the emphasis and outputs it from the power point,
A component force means for transmitting the force loaded on the force point of the weight booster;
The component forces divided by the component force means are respectively loaded with emphasis, a plurality of component force boosters 対 that are paired to amplify the component force and output from the force point,
A resultant force means for combining the forces output from the power points of the plurality of component force boosters;
A resultant force transmission load means for transmitting the force combined by the resultant force means to a load object and loading it;
A load amplification load device comprising:   2. The load amplification load device according to claim 1, wherein each component force booster is provided with a blade and a blade receiver at least at its fulcrum and force point to receive the force.   The load amplification load device according to claim 1 or 2, wherein the load load object is a load measurement device for measuring a load.   The combined force means is connected to a force point of the paired component force booster rods, and the resultant force means is supported so as to be movable up and down via a Robert valve mechanism. The load amplification load device according to any one of the preceding claims.   Inclination state detection means for detecting the inclination state of the weight booster rod, and correction means for correcting the load applied to the load object in accordance with the inclination state detected by the inclination state detection means. The load amplification load device according to any one of claims 1 to 4, wherein   The load amplification load device according to any one of claims 1 to 5, further comprising a horizontal control unit that controls the weight booster to be horizontal.   A waste weight 無 駄 that can cancel a load other than the weight to be loaded on the load load object is provided, and the balance weight for canceling the load other than the weight acting on the load load object is provided on the waste weight 無 駄. The load amplification load device according to any one of claims 1 to 6, further comprising a platform on which a weight can be placed.   The load amplification load device according to any one of claims 1 to 7, wherein the weight booster is provided with a rest device that temporarily receives a load from a weight.   The load amplification load device according to any one of claims 1 to 8, wherein the component force unit is a component force kit that divides and transmits an input force.   The load amplification load device according to any one of claims 1 to 9, wherein the resultant force means is a resultant force ring that transmits forces input from two places together.   After the load of the weight is amplified by the weight booster 槓桿, the amplified force is divided into a plurality of components, and the divided component forces are respectively amplified by the plurality of parallel component booster 、 s. A load amplification loading method characterized in that the load is applied to a load object by combining forces. Apply the weight of a known weight to the weight booster weight,
A secondary lever consists of a single lever as a component means for amplifying the load by one or more weight booster rods connected in series with one or more primary levers or a third lever and connecting the amplified loads. 2n-1 component force ridges (where n is a positive integer greater than or equal to 1) are arranged,
The divided 2n loads are applied to the emphasis of 2n heavy load components,
The amplified load is set below the maximum load value determined by the contact load limit between the blade and blade holder used for the component force booster.
The load of each force point blade of two component force boosters consisting of adjacent primary lever or tertiary lever is transmitted to the resultant ring as a resultant force means,
Combine the load with the resultant ring to obtain a large load,
A load amplification loading method characterized by loading on a load object. In order to minimize the heel inclination caused by the load being applied,
Between the fixed part or load transmitting part of the load cell or weighing device of the load object to be loaded with the maximum load and the support frame fixed at a predetermined position,
Or, between a plurality of fulcrum pedestals with a component force booster that is subject to a large load and the frame that holds the fulcrum pedestals,
A large load minute amount adjustment means that can be displaced by a large load and a small amount consisting of a hydraulic cylinder or an electric jack, and a displacement amount control means for controlling this displacement amount are provided,
The displacement of the weight booster 生 じ る that produces the largest displacement when a load is applied is detected, and the heavy load minute amount adjusting means is controlled so that the weight booster 戻 る returns to the horizontal, so that The load amplification load method according to claim 11 or 12, wherein the load amplification load method is held horizontally.

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