WO2018076472A1 - Large-mass-weight storing device and large-mass-weight handling module - Google Patents

Large-mass-weight storing device and large-mass-weight handling module Download PDF

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Publication number
WO2018076472A1
WO2018076472A1 PCT/CN2016/109033 CN2016109033W WO2018076472A1 WO 2018076472 A1 WO2018076472 A1 WO 2018076472A1 CN 2016109033 W CN2016109033 W CN 2016109033W WO 2018076472 A1 WO2018076472 A1 WO 2018076472A1
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WO
WIPO (PCT)
Prior art keywords
weight
mass
weights
storing
supporting
Prior art date
Application number
PCT/CN2016/109033
Other languages
French (fr)
Inventor
Xiaoping Ren
Jian Wang
Changqing CAI
Tao Li
Manhong HU
Xiang Wang
Ping Chen
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National Institute Of Metrology
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Publication of WO2018076472A1 publication Critical patent/WO2018076472A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
    • G01G19/40—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight
    • G01G19/413—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight using electromechanical or electronic computing means
    • G01G19/414—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight using electromechanical or electronic computing means using electronic computing means only
    • G01G19/4144—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight using electromechanical or electronic computing means using electronic computing means only for controlling weight of goods in commercial establishments, e.g. supermarket, P.O.S. systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G1/00—Storing articles, individually or in orderly arrangement, in warehouses or magazines
    • B65G1/02—Storage devices
    • B65G1/14—Stack holders or separators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G1/00—Storing articles, individually or in orderly arrangement, in warehouses or magazines
    • B65G1/16—Special arrangements of articles in storage spaces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G23/00—Auxiliary devices for weighing apparatus
    • G01G23/01—Testing or calibrating of weighing apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
    • B65G2201/02—Articles

Definitions

  • the disclosure relates to mass metrology field, in particular to a large-mass-weight storing device and a large-mass-weight handling module.
  • the term “large-mass-weight” used herein refers to a high-level high-precision standard mass weight which can be used for transferring standard mass to a low-level weight.
  • Weights are commonly used in the mass metrology field, where the high-level weights are configured for measuring the lower-level (or lower-stage) weights. During use of the standard mass weights, they need to be stored effectively so that dusts and moistures can be inhibited from adhering to surfaces of the weights under terrible environments, otherwise the masses of the weights may change and thus their use stability and long-time durability will be influenced.
  • the high-precision weights can not be handled using common lifting devices because the lifting devices may damage the surfaces of the weights and thus cause changes to their mass values.
  • the weight to be measured has a mass of 500kg, 10 high-level standard mass 50kg weights are needed. In case that the requirements can not be met in laboratories or no or insufficient high-level 50kg weights are available, 25 20kg weights are needed for the mass comparison. Handling so many standard mass weights by common lifting techniques one by one causes a low efficiency, a potential damage to the surfaces of the weights, and even injury to a human or damage to components of other devices.
  • An object of the invention is to provide a large-mass-weight storing device, provide a weight structure adapted to be stored in the large-mass-weight storing device, and provide a large-mass-weight handling module for facilitating the operation of the large-mass-weights during usual use.
  • a large-mass-weight storing device comprising a supporting frame for providing a plurality of weight storing positions for storing a plurality of weights, the plurality of weight storing positions being arranged in a plurality of layers which are spaced from each other in a vertical direction, and the weight storing positions in each layer being arranged in a first horizontal direction substantially perpendicular to the vertical direction, wherein the large-mass-weight storing device defines a weight accessing side and an opposite back side in a second horizontal direction substantially perpendicular to the vertical direction, the large-mass-weight storing device opens at the weight accessing side so that the weights can be stored and taken out, and each weight storing position comprises a weight retaining structure for maintaining the stored large-mass-weight in the weight storing position.
  • the stored large-mass-weights are cylindrical weights
  • the weight storing positions in each layer are provided by a common shelf
  • the weight retaining structure for each weight storing position is a circular recess recessed into the shelf, the circular recess having an inner diameter corresponding to an outer diameter of the stored large-mass-weight.
  • the number of the weight storing positions in different layers is same or different, and/or the weight storing position is adapted for storing one or more mass classes of large-mass weighs, and/or the larger mass weights are stored in the weight storing positions in the lower layer in the vertical direction.
  • the weight retaining structure further comprises a through-hole extending through the shelf in the corresponding weight storing position.
  • the circular recess is a stepped circular recess which comprises a plurality of circular recess portions provided in a stepped manner, the plurality of circular recess portions each having different inner diameters corresponding to the outer diameters of large-mass-weights with different mass classes.
  • the stored large-mass-weights are cubic weights
  • each weight storing position comprises a separate L-shaped weight holding bracket, the weight holding bracket being configured for storing one weight and being configured to be secured to the supporting frame.
  • the weight holding bracket comprises a base portion adapted to be secured to the supporting frame and a supporting portion extending from the base portion and providing a supporting surface, the supporting portion comprising a plurality of grooves recessed into the supporting surface, and each groove comprising a closed end approximate to the base portion and an opposite open end at the weight accessing side.
  • each weight holding bracket comprises protruding edges protruding upwards from the supporting surface of the supporting portion at its opposites sides in the longitudinal direction.
  • each weight storing position is provided with a detector for ensuring that the large-mass-weight can be stored properly and can be taken out accurately.
  • the detector is an optical detector.
  • the supporting frame comprises a supporting base, and a supporting side portion and/or a supporting back portion for supporting the shelves.
  • the supporting frame is made of an alumnum alloy material.
  • a large-mass-weight handling module comprising a frame having an intrinsic mass and a plurality of large-mass-weights supported by the frame, wherein the intrinsic mass is equal to the mass of one large-mass-weight, and the large-mass-weight handling module with the plurality of large-mass-weights has a predetermined total mass, and wherein the frame comprises a supporting base, the supporting base providing a plurality of the weight storing positions for the plurality of large-mass-weights, and each weight storing position being provided with a weight retaining structure for maintaining the stored large-mass-weight in the corresponding weight storing position.
  • the large-mass-weights are 50KG or 20KG standard mass weights.
  • a cylindrical large-mass standard weight having a standard mass and comprising a cylindrical body comprising a positioning protrusion extending out from a top end surface of the cylindrical body and a positioning notch recessed into the cylindrical body from a bottom surface of the cylindrical body, wherein the positioning protrusion of the large-mass-weight stored on an shelf in a lower layer can be received in the positioning notch of the large-mass-weight stored on an shelf in an upper layer.
  • the cylindrical large-mass standard weight is 50KG high-precision standard mass weight.
  • the cylindrical large-mass standard weight is adapted to be stored in the above large-mass-weight storing device.
  • the large-mass-weight storing device achieves a centralized storage of the large-mass-weights, achieves a stable storage of the weights on the shelves, and makes the large-mass-weight easy and convenient to access.
  • Figure 1 is a perspective view of a large-mass-weight storing device for storing cylindrical large-mass weighs according to the invention
  • Figure 2 is a top view of Figure 1 with the weights removed;
  • Figure 3 is an illustrative view of a large-mass-weight adapted to be stored in the large-mass-weight storing device in Figure 1;
  • Figure 4 is a perspective view of a large-mass-weight storing device for storing cubic large-mass-weights according to the invention
  • Figure 5 is a perspective view of the large-mass-weight storing device in Figure 4 with the weights removed;
  • Figure 6 is an enlarged view of a weight storing bracket of the large-mass-weight storing device in Figure 5;
  • Figure 7 shows a combined transportation device for transporting large-mass-weights.
  • large-mass-weight refers to, just as its name implies, a weight with a large-mass which is inconvenient to store, to pick up, and to handle, for example, a high-precision standard mass weigh for measuring a lower-level large-mass-weight.
  • Typical large-mass standard weights include 20Kg weights and 50Kg weights.
  • weight is also used for convenience. Otherwise stated, the term “weight” refers to the “large-mass-weight” .
  • a large-mass-weight storing device is a storing device in the form of a vertical, matrix-like frame.
  • weights are stored in a plurality of layers which are spaced from each other in a vertical direction.
  • the storing device defines a weight accessing side and an opposite back side in a first horizontal direction which is perpendicular to the vertical direction, and the storing device is open at the weight accessing side so that the weights can be stored and taken out from the weight accessing side.
  • the storing device can also be open or can be provided with a back plate at the back side.
  • the weights are arranged in a second horizontal direction which is perpendicular to the vertical direction.
  • a large-mass-weight storing device 100 is configured for storing the substantially cylindrical large-mass-weights , for example, 50KG ⁇ 20KG cylindrical weights.
  • the large-mass-weight storing device 100 mainly comprises a supporting frame 20 and a plurality of shelves 40 supported by the supporting frame 20, the plurality of shelves 40 being spaced from each other in the vertical direction and each comprising a supporting surface in a horizontal orientation.
  • the supporting surface of each shelf 40 includes a plurality of the weight storing positions 42. As shown in Figure 1, each weight storing position 42 is configured for storing one substantially cylindrical weight 10.
  • the large-mass-weight storing device 100 defines a longitudinal direction L and a transverse direction T which is transverse to, for example, perpendicular to, the longitudinal direction L, both the longitudinal direction L and the transverse direction T being substantially perpendicular to the vertical direction.
  • the plurality of weight storing positions 42 are arranged in the longitudinal direction L.
  • the large-mass-weight storing device 100 defines a weight accessing side T1 and an opposite back side T2.
  • the supporting frame 20 is designed to be open at the weight accessing side T1 so that any weight stored in the large-mass-weight storing device 100 can be accessed from the weight accessing side T1.
  • the large-mass-weight storing device 100 comprises a detector (not shown) provided on the shelf 40, which can be any type of sensor, such as an optical sensor, a laser etc.
  • the detector can be provided for each weight storing position 42 of each shelf 40.
  • a single common detector can be provided for several weight storing positions 42 or for all the weight storing positions 42.
  • the detector can be positioned at any suitable position on the shelf 40.
  • each weight storing position 42 can be provided with its own detector at either or both of the weight accessing side T1 and the back side T2 of the shelf 40.
  • the fact that the detector for the desired weight storing position 42 is aligned or otherwise mated with a corresponding detector provided on the weight gripping mechanism indicates that the weight has been properly positioned right above the desired weight storing position 42 and that lowering the weight 10 can place the weight into a desired circular recess properly of the desired weight storing position 42.
  • the fact that the detector for the desired weight storing position 42 is aligned or otherwise mated with the corresponding detector provided on the weight gripping mechanism indicates that the weight gripping mechanism, for example, a weight gripping arm, has been positioned at a desired target position and that the gripping operation of the weight 10 can move on to a next step then.
  • the large-mass-weight storing device 100 further comprises a weight retaining structure for maintaining the weight 10 in the weight storing position 42 of the shelf 40 securely, reliably and safely, after the weight 10 has been placed in the weight storing position 42 properly.
  • the weight retaining structure is in the form of a circular recess 44, the circular recess 44 being recessed into the shelf 40 so that the stored weight is partially embedded into the thickness of the shelf 40 to prevent the weight from moving.
  • the circular recess 44 has an inner diameter corresponding to an outer diameter the large-mass-weight 10 to be stored, for example, slightly larger than the outer diameter of the weight 10.
  • the circular recess 44 is provided with a through-hole 46 extending through the shelf 40.
  • the circular recess 44 can be a stepped circular recess which comprises a plurality of circular recess portions with different inner diameters, the inner diameters of the circular recess portions each corresponding to, for example, slightly larger than the diameters of the weights of different masses.
  • the same weight storing position 42 can be used for storing weights of different classes or masses.
  • the circular recess portion closest to the supporting surface of the shelf 40 has the largest inner diameter.
  • the stepped circular recess can be used for storing 50KG weights or 20Kg weights.
  • each shelf 40 may have any number of weight storing positions, and the number of the weight storing positions of different shelves 40 may be same or different.
  • the weight storing positions of the same shelf 40 can be used for storing weights of the same class or mass or of different classes or masses.
  • the lower layer the shelf 40 lies in the larger masses the weights intended to be stored in the shelf 40 can have, and the masses of the weights reduce in the upward vertical direction.
  • the 50KG weights are stored in the lowest layer, and the 20KG weights are stored in other layers. It should be understood that the 20KG weights can also be stored in the lowest layer and the 50KG weights can also be stored in other layers.
  • the supporting frame 20 of the large-mass-weight storing device 100 generally comprises a supporting base 22 and supporting side portions 24 extending upwards from the supporting base 22, with the shelves 40 extending between the two supporting side portions 24.
  • the supporting frame 20 further comprises a supporting back portion 26 extending upwards from the supporting base 22, the supporting back portion 26 being connected between the supporting side portions 24.
  • the shelves 40 can be further supported by the supporting back portion 26 so as to form a more stable mechanism supported at three sides.
  • the supporting frame 20 may not comprise the two supporting side portions 24, and the shelves 40 can be supported merely by the supporting back portion 26 in a cantilevered form, or can be supported by the supporting back portion 26 and one supporting side portion 24.
  • Reinforcing ribs having any suitable structures can be provided at any desired positions on the supporting frame 20 for increasing the rigidity of the supporting frame.
  • reinforcing ribs 27 are provided on the supporting back portion 26, as shown in Figure 2.
  • the shelves 40 can be fixedly connected to the supporting side portion 24 and/or the supporting back portion 26 in any well-known manner, including, but not limited to, riveting, welding, screwing etc. Riveting is preferred for rigidity and safety reasons.
  • the supporting frame 20 and the shelves 40 can be made of any suitable material with sufficient rigidity. Aluminium alloy materials are preferable due to their high strengths and light weights, and these materials are free from magnetic interference and thus will not influence the stored weights for a long time.
  • the supporting side portion and the supporting back portion of the supporting frame 20 may have a plate-like structure, or are provided as supporting legs which are interconnected.
  • the supporting frame 20 is made up with supporting legs plus a glass sideplate, which ensures visability of the interior of the storing device 100 and the cleanness of the stored weights, and avoids the weights from being contaminated by dirt and dusts.
  • the supporting frame 20 is provided with an openable door at the weight accessing side T1.
  • the large-mass-weight storing device of the invention described as above can achieve a compact and integrated storage of the large-mass-weights, has a compact structure and a small footprint, and makes it convenient for the operator to operate, which economizes manpower and improves efficiency.
  • the provision of the weight retaining structure makes it possible that the weights can be stored on the shelves securely and reliably, without significant displacement or even falling down.
  • the large-mass-weight 10 comprises a gripping portion 12 by means of which the weight 10 can be gripped for storing and picking up and other operations.
  • the gripping portion 12 is provided approximate to an upper end of the weight, and is formed as a recess which is recessed into an outer surface of weight 10.
  • the gripping portion 12 is recessed into the weight 10 from its outer surface in its entire circumference.
  • the gripping portion 12 can be recessed into the weight 10 at a plurality of positions on the outer surface which are spaced from each other in a circumferential direction.
  • the gripping portion 12 can also be provided as protrusions which protrude from the outer surface, as long as it achieves the reliable gripping and lifting of the weight 10. This makes the large-mass-weights easy to be picked up, to be held and to be handled, while avoiding the weights to be damaged during the handling process. This is particularly advantageous for the large-mass-weights.
  • the weight 10 comprises a protrusion 14 extending out from its top surface and a notch 16 recessed into its opposite bottom surface, the protrusion 14 and the notch 16 being shaped and sized so that, when the weights 10 are stacked and stored in the layers one on top of another in the storing device as shown in Figure 1, the protrusion 14 of the weight 10 on a lower shelf 40 can pass through the through-hole 46 in the weight storing position 42 of an upper shelf 40 right above the lower shelf 40, to be received in the notch 16 of the weight 10 on the upper shelf 40, which ensures that the weights 10 are stable relative to each other, prevents the weights 10 from rocking and moving, and at the same time avoids a risk that a plane-to-plane contact will scrape the surfaces of the weights 10.
  • the storing device 100 for the substantially cylindrical weights has been described as above, and a storing device 200 for the substantially cubic weights will be described in the following.
  • the substantially cylindrical weights are handled in a gripped manner, while the substantially cubic weights are handled in a lifted-from-bottom manner.
  • the large-mass-weight storing device 200 in Figure 4 can be used for storing cubic weights 210 in a plurality of layers which are spaced from each other in the vertical direction, weight storing positions 242 and thus the weights 210, in each layer, are arranged in the longitudinal direction L.
  • each weight 210 is provided with its own weight storing bracket 240.
  • the weight storing bracket 240 for each weight 210 is secured independently to a supporting frame 220 and, in particular, is secured independently to a supporting back plate 226 of the supporting frame 220.
  • the supporting frame 220 has a simple structure which only comprises a supporting base 222 and the supporting back plate 226.
  • each layer is arranged in the longitudinal direction L and are secured independently to the supporting back plate 226.
  • Each weight storing bracket 240 is adapted for storing one cubic weight 210.
  • FIG. 6 is an enlarged view of the weight storing bracket 240 of the large-mass-weight storing device 200.
  • the weight storing bracket 240 defines a L shape and comprises a base portion 242 adapted to be secured to the supporting back plate 226 and a supporting portion 244 which extends out from the base portion 242 towards the weight accessing side T1 when the weight storing bracket 240 is secured on the supporting back plate 226.
  • the supporting portion 244 comprises a supporting surface 245 adapted for supporting the weight 210 and two or more grooves 246 formed into the supporting surface 245, each groove 246 being closed at one end 246a approximate to the base portion 242 and open at the opposite end 246b so that a teeth-like structure can enter and retract out of the grooves 246 from the end 246b.
  • the supporting surface 245 is provided with protruding edges 248 protruding upwards at its opposite sides of the longitudinal direction, so as to prevent the weight 210 from moving in the longitudinal direction L.
  • the weight storing bracket 240 may also comprise a detector (not shown) which can be aligned or otherwise mated with a corresponding detector provided on a weight picking up device, the detector being configured for indicating that the weight picking up device has reached a position in a predetermined position relationship with respect to the target weight storing position 242.
  • the weight 210 is held at its bottom surface by the weight picking up device with teeth and delivered to a position right above the desired weight storing bracket 240.
  • the fact that the detector on the weight picking up device is aligned or otherwise mated with the detector on the weight storing bracket 240 indicates that the weight 210 has been located right above the weight storing bracket 240, and lowering the weight picking up device together with the weight 210 would place the weight 210 onto the desired weight storing bracket 240.
  • the teeth of the weight picking up device fall into the corresponding grooves 246 of the weight storing bracket 240, for example, the outmost two grooves 246.
  • the teeth of the weight picking up device are inserted from the end 246b at the weight accessing side T1 into the corresponding grooves 246, until tips of the teeth come into contact with the closed end 246a of the grooves 246, then the weight picking up device and thus the weight 210 are lifted apart from the weight storing bracket 240.
  • moving the weight 210 in the transverse direction T towards the weight accessing side T1 will finish the retrieval of the weight.
  • the “large-mass-weights ⁇ in the invention are high-precision standard mass weighs
  • a plurality of standard mass weights be used together, as a unit.
  • 10 50KG weights are used together to provide a 500KG standard mass weight to be compared with a weight to be measured.
  • Due to the 500KG standard mass weight including 10 50KG weights use of the 500KG standard mass weight involves loading and unloading the 50KG weights many times, which is time consuming and causes a waste of manpower.
  • Providing the “large-mass-weight handling module” of the invention as shown in Figure 6 intends to alleviate the above disadvantages and facilitate the loading and unloading operations of the large-mass-weights.
  • the “large-mass-weight handling module” has its own proper mass or intrinsic mass which is equal to the mass of one large-mass-weight.
  • the “large-mass-weight handling module” can carry a predefined number of large-mass-weights, so that the “large-mass-weight handling module” with the predefined number of large-mass-weights also has a constant or invariant mass.
  • the large-mass-weight handling module 300 is designed, in Figure 6, to carry nine cylindrical 50KG high-precision large-mass-weights, and thus comprises nine weight storing positions 342, with the intrinsic mass of its module frame itself being 50KG and the total mass of the fully loaded module being 500 KG.
  • This is particularly advantageous as a temporary frame when the 500KG weight is frequently used as a measurement datum.
  • the frame and the nine 50KG weights which the frame carries are operated as a unit, such as transporting, lifting etc., which saves operating time and manpower required substantially, compared to handling 10 50KG weights.
  • the large-mass-weight handling module 300 Due to the intrinsic mass of the frame being 50KG, the large-mass-weight handling module 300 has a mass of 200KG if 3 50KG weights are loaded in the frame, and they can be used as a standard mass of 200KG. 20KG weights can also be loaded as desired if the weight retaining structure is appropriately sized.
  • the large-mass-weight handling module 300 mainly comprises a module frame 320 consisting of a main supporting base 322 and supporting side portions 324, and the weights loaded thereon (not shown in the drawings) .
  • the main supporting base 322 may be in the form of a supporting plate and comprises nine weight storage positions 342 and nine weight retaining structures as described above, for storing and supporting functions.
  • the weight retaining structure is in the form of a circular recess, and the size of the circular recess depends on the outer diameter of the cylindrical weights to be stored.
  • the supporting side portion 324 can be in the form of plate, or in the form of connecting rod as show in the drawings.
  • the large-mass-weight handling module 300 may comprise one, two, three, or four supporting side portion 324.
  • four supporting side portions 324 in the form of the connecting rod are shown, in which three supporting side portions 324 have the same distance from the main supporting base 322 in the form of plate or have the same height, and the fourth supporting side portion 324 is much closer to the main supporting base 322, so that the supporting side portion 324 would not interfere with the storage of the weights.
  • the supporting side portions 324 place a role of improving the rigidity of the module and providing protection.
  • a lifting portion can be provided on one or both of the supporting side portions 324 and the main supporting base 322 for lifting up and lowering down the entire module.
  • All components of the large-mass-weight handling module are made of magnetism-free stainless steel in order to provide sufficient strength, reduce magnetic effects on the stored weights, and ensure the accuracy of the stored standard mass weights.

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Abstract

A large-mass-weight storing device (100,200) is provided. The storing device (100,200) comprises a supporting frame (20,220) for providing a plurality of weight storing positions (42,242) for storing a plurality of weights (10,210), the plurality of weight storing positions (42,242) being arranged in a plurality of layers which are spaced from each other in a vertical direction, and the weight storing positions (42,242) in each layer being arranged in a first horizontal direction substantially perpendicular to the vertical direction, wherein the large-mass-weight storing device (100,200) defines a weight accessing side (T1) and an opposite back side (T2) in a second horizontal direction substantially perpendicular to the vertical direction, the large-mass-weight storing device (100,200) opens at the weight accessing side (T1) so that the weights (10,210) can be stored and taken out, and each weight storing position (42,242) comprises a weight retaining structure for maintaining the stored large-mass-weight in the weight storing position (42,242). A weight structure which is convenient to handle and a large-mass-weight handling module (300) are provided.

Description

Large-Mass-Weight Storing Device and Large-Mass-Weight Handling Module Technical Field
The disclosure relates to mass metrology field, in particular to a large-mass-weight storing device and a large-mass-weight handling module. In particular, the term “large-mass-weight” used herein refers to a high-level high-precision standard mass weight which can be used for transferring standard mass to a low-level weight.
Background Art
Weights are commonly used in the mass metrology field, where the high-level weights are configured for measuring the lower-level (or lower-stage) weights. During use of the standard mass weights, they need to be stored effectively so that dusts and moistures can be inhibited from adhering to surfaces of the weights under terrible environments, otherwise the masses of the weights may change and thus their use stability and long-time durability will be influenced.
The high-precision weights can not be handled using common lifting devices because the lifting devices may damage the surfaces of the weights and thus cause changes to their mass values. During mass measurements using the large-mass-weights, for example, the weight to be measured has a mass of 500kg, 10 high-level standard mass 50kg weights are needed. In case that the requirements can not be met in laboratories or no or insufficient high-level 50kg weights are available, 25 20kg weights are needed for the mass comparison. Handling so many standard mass weights by common lifting techniques one by one causes a low efficiency, a potential damage to the surfaces of the weights, and even injury to a human or damage to components of other devices.
Storing and taking out the large-mass standard weights is also an important challenge. As described above, it is often required to store and take out a large amount of large-mass-weights and accessing the heavy large-mass-weights should be performed in a way of not damaging or contaminating the weights, which are difficult to achieve at present.
It is then demanded to solve the above problems.
Summary of the Invention
An object of the invention is to provide a large-mass-weight storing device, provide a weight structure adapted to be stored in the large-mass-weight storing device, and provide a large-mass-weight handling module for facilitating the operation of the large-mass-weights during usual use.
In a first aspect of the invention, a large-mass-weight storing device comprising a supporting frame for providing a plurality of weight storing positions for storing a plurality of weights is provided, the plurality of weight storing positions being arranged in a plurality of layers which are spaced from each other in a vertical direction, and the weight storing positions in each layer being arranged in a first horizontal direction substantially perpendicular to the vertical direction, wherein the large-mass-weight storing device defines a weight accessing side and an opposite back side in a second horizontal direction substantially perpendicular to the vertical direction, the large-mass-weight storing device opens at the weight accessing side so that the weights can be stored and taken out, and each weight storing position comprises a weight retaining structure for maintaining the stored large-mass-weight in the weight storing position.
According to an embodiment, the stored large-mass-weights are cylindrical weights, the weight storing positions in each layer are provided by a common shelf, and the weight retaining structure for each weight storing position is a circular recess recessed into the shelf, the circular recess having an inner diameter corresponding to an outer diameter of the stored large-mass-weight.
According to an embodiment, the number of the weight storing positions in different layers is same or different, and/or the weight storing position is adapted for storing one or more mass classes of large-mass weighs, and/or the larger mass weights are stored in the weight storing positions in the lower layer in the vertical direction.
According to an embodiment, the weight retaining structure further comprises a through-hole extending through the shelf in the corresponding weight storing position.
According to an embodiment, the circular recess is a stepped circular recess which  comprises a plurality of circular recess portions provided in a stepped manner, the plurality of circular recess portions each having different inner diameters corresponding to the outer diameters of large-mass-weights with different mass classes.
According to an embodiment, the stored large-mass-weights are cubic weights, and each weight storing position comprises a separate L-shaped weight holding bracket, the weight holding bracket being configured for storing one weight and being configured to be secured to the supporting frame.
According to an embodiment, the weight holding bracket comprises a base portion adapted to be secured to the supporting frame and a supporting portion extending from the base portion and providing a supporting surface, the supporting portion comprising a plurality of grooves recessed into the supporting surface, and each groove comprising a closed end approximate to the base portion and an opposite open end at the weight accessing side.
According to an embodiment, each weight holding bracket comprises protruding edges protruding upwards from the supporting surface of the supporting portion at its opposites sides in the longitudinal direction.
According to an embodiment, each weight storing position is provided with a detector for ensuring that the large-mass-weight can be stored properly and can be taken out accurately.
According to an embodiment, the detector is an optical detector.
According to an embodiment, the supporting frame comprises a supporting base, and a supporting side portion and/or a supporting back portion for supporting the shelves.
According to an embodiment, the supporting frame is made of an alumnum alloy material.
In a second aspect of the invention, a large-mass-weight handling module comprising a frame having an intrinsic mass and a plurality of large-mass-weights supported by the frame is provided, wherein the intrinsic mass is equal to the mass of one large-mass-weight, and the large-mass-weight handling module with the plurality of large-mass-weights has a predetermined total mass, and wherein the frame comprises a  supporting base, the supporting base providing a plurality of the weight storing positions for the plurality of large-mass-weights, and each weight storing position being provided with a weight retaining structure for maintaining the stored large-mass-weight in the corresponding weight storing position.
According to an embodiment, the large-mass-weights are 50KG or 20KG standard mass weights.
In a third aspect of the invention, a cylindrical large-mass standard weight having a standard mass and comprising a cylindrical body is provided, the cylindrical body comprising a positioning protrusion extending out from a top end surface of the cylindrical body and a positioning notch recessed into the cylindrical body from a bottom surface of the cylindrical body, wherein the positioning protrusion of the large-mass-weight stored on an shelf in a lower layer can be received in the positioning notch of the large-mass-weight stored on an shelf in an upper layer.
In a second aspect of the invention, the cylindrical large-mass standard weight is 50KG high-precision standard mass weight.
In a second aspect of the invention, the cylindrical large-mass standard weight is adapted to be stored in the above large-mass-weight storing device.
The large-mass-weight storing device according to the invention achieves a centralized storage of the large-mass-weights, achieves a stable storage of the weights on the shelves, and makes the large-mass-weight easy and convenient to access.
Brief Description of the Drawings
The above summary and other features and advantages of the invention can be better understood from the detail description in combination with the drawings. However, it should be understood that the drawings are not depicted in scale and are only given for illustrating the principle of the invention for the purpose of illustration and explanation. In the drawings, portions related with inventive features and advantages of the invention are shown in detail, and portions not related with the inventive features and advantages of the invention are omitted or simplified. Components, devices and structures which are not shown in the drawings may be included in the large-mass-weight storing device of  the invention. In the drawings:
Figure 1 is a perspective view of a large-mass-weight storing device for storing cylindrical large-mass weighs according to the invention；
Figure 2 is a top view of Figure 1 with the weights removed；
Figure 3 is an illustrative view of a large-mass-weight adapted to be stored in the large-mass-weight storing device in Figure 1；
Figure 4 is a perspective view of a large-mass-weight storing device for storing cubic large-mass-weights according to the invention；
Figure 5 is a perspective view of the large-mass-weight storing device in Figure 4 with the weights removed；
Figure 6 is an enlarged view of a weight storing bracket of the large-mass-weight storing device in Figure 5； and
Figure 7 shows a combined transportation device for transporting large-mass-weights.
Detailed Description of Preferred Embodiments
A large-mass-weight storing device will be described with reference to the drawings according to the invention. Throughout the drawings, the same or similar reference signs (40, 240) refer to components with the same or similar functions or structures.
The term “large-mass-weight” refers to, just as its name implies, a weight with a large-mass which is inconvenient to store, to pick up, and to handle, for example, a high-precision standard mass weigh for measuring a lower-level large-mass-weight. Typical large-mass standard weights include 20Kg weights and 50Kg weights. However, the principle of the invention is not only applicable to these two mass classes, but also applicable to any mass class of large-mass-weights. In the context, the term “weight” is also used for convenience. Otherwise stated, the term “weight” refers to the “large-mass-weight” .
In general, a large-mass-weight storing device according to the invention is a storing device in the form of a vertical, matrix-like frame. In the storing device, weights are stored in a plurality of layers which are spaced from each other in a vertical direction.  The storing device defines a weight accessing side and an opposite back side in a first horizontal direction which is perpendicular to the vertical direction, and the storing device is open at the weight accessing side so that the weights can be stored and taken out from the weight accessing side. The storing device can also be open or can be provided with a back plate at the back side. In each layer, the weights are arranged in a second horizontal direction which is perpendicular to the vertical direction.
In particular, there are two categories of large-mass-weights, substantially cylindrical large-mass-weights and substantially cubic large-mass-weights. Description of the storing device will be given with regard to these two categories of large-mass-weights, respectively.
As shown in Figure 1, a large-mass-weight storing device 100 is configured for storing the substantially cylindrical large-mass-weights , for example, 50KG 和 20KG cylindrical weights.
The large-mass-weight storing device 100 mainly comprises a supporting frame 20 and a plurality of shelves 40 supported by the supporting frame 20, the plurality of shelves 40 being spaced from each other in the vertical direction and each comprising a supporting surface in a horizontal orientation. The supporting surface of each shelf 40 includes a plurality of the weight storing positions 42. As shown in Figure 1, each weight storing position 42 is configured for storing one substantially cylindrical weight 10.
The large-mass-weight storing device 100 defines a longitudinal direction L and a transverse direction T which is transverse to, for example, perpendicular to, the longitudinal direction L, both the longitudinal direction L and the transverse direction T being substantially perpendicular to the vertical direction. For each shelf 40, the plurality of weight storing positions 42 are arranged in the longitudinal direction L. In the transverse direction T, the large-mass-weight storing device 100 defines a weight accessing side T1 and an opposite back side T2. The supporting frame 20 is designed to be open at the weight accessing side T1 so that any weight stored in the large-mass-weight storing device 100 can be accessed from the weight accessing side T1.
In order to properly place the weight 10 into a desired weight storing position 42 from  the weight accessing side T1, the large-mass-weight storing device 100 according to the invention comprises a detector (not shown) provided on the shelf 40, which can be any type of sensor, such as an optical sensor, a laser etc.
The detector can be provided for each weight storing position 42 of each shelf 40. Alternatively, a single common detector can be provided for several weight storing positions 42 or for all the weight storing positions 42. The detector can be positioned at any suitable position on the shelf 40. As an example, each weight storing position 42 can be provided with its own detector at either or both of the weight accessing side T1 and the back side T2 of the shelf 40.
When it is intended to place the weight 10, which is being gripped by a weight gripping mechanism, into the desired weight storing position 42, the fact that the detector for the desired weight storing position 42 is aligned or otherwise mated with a corresponding detector provided on the weight gripping mechanism indicates that the weight has been properly positioned right above the desired weight storing position 42 and that lowering the weight 10 can place the weight into a desired circular recess properly of the desired weight storing position 42. When it is intended to take out the weight 10 in the desired weight storing position 42, the fact that the detector for the desired weight storing position 42 is aligned or otherwise mated with the corresponding detector provided on the weight gripping mechanism indicates that the weight gripping mechanism, for example, a weight gripping arm, has been positioned at a desired target position and that the gripping operation of the weight 10 can move on to a next step then.
The large-mass-weight storing device 100 further comprises a weight retaining structure for maintaining the weight 10 in the weight storing position 42 of the shelf 40 securely, reliably and safely, after the weight 10 has been placed in the weight storing position 42 properly. The weight retaining structure is in the form of a circular recess 44, the circular recess 44 being recessed into the shelf 40 so that the stored weight is partially embedded into the thickness of the shelf 40 to prevent the weight from moving.
The circular recess 44 has an inner diameter corresponding to an outer diameter the large-mass-weight 10 to be stored, for example, slightly larger than the outer diameter of the weight 10. The circular recess 44 is provided with a through-hole 46 extending  through the shelf 40.
Alternatively, the circular recess 44 can be a stepped circular recess which comprises a plurality of circular recess portions with different inner diameters, the inner diameters of the circular recess portions each corresponding to, for example, slightly larger than the diameters of the weights of different masses. In this way, the same weight storing position 42 can be used for storing weights of different classes or masses. In this case, the circular recess portion closest to the supporting surface of the shelf 40 has the largest inner diameter. For example, the stepped circular recess can be used for storing 50KG weights or 20Kg weights.
As desired, each shelf 40 may have any number of weight storing positions, and the number of the weight storing positions of different shelves 40 may be same or different. As desired, the weight storing positions of the same shelf 40 can be used for storing weights of the same class or mass or of different classes or masses. However, for safety and convenience purpose, the lower layer the shelf 40 lies in, the larger masses the weights intended to be stored in the shelf 40 can have, and the masses of the weights reduce in the upward vertical direction. For example, in the embodiment of Figure 1, the 50KG weights are stored in the lowest layer, and the 20KG weights are stored in other layers. It should be understood that the 20KG weights can also be stored in the lowest layer and the 50KG weights can also be stored in other layers.
In addition, in the embodiment of Figures 1 and 2, the supporting frame 20 of the large-mass-weight storing device 100 generally comprises a supporting base 22 and supporting side portions 24 extending upwards from the supporting base 22, with the shelves 40 extending between the two supporting side portions 24. Alternatively but not necessarily, the supporting frame 20 further comprises a supporting back portion 26 extending upwards from the supporting base 22, the supporting back portion 26 being connected between the supporting side portions 24. The shelves 40 can be further supported by the supporting back portion 26 so as to form a more stable mechanism supported at three sides.
Only one possible structure of the supporting frame 20 is shown in the drawings, other than which, any other kinds of supporting structures which can achieve the same  supporting function can be used. For example, provided with sufficient rigidity, the supporting frame 20 may not comprise the two supporting side portions 24, and the shelves 40 can be supported merely by the supporting back portion 26 in a cantilevered form, or can be supported by the supporting back portion 26 and one supporting side portion 24. Reinforcing ribs having any suitable structures can be provided at any desired positions on the supporting frame 20 for increasing the rigidity of the supporting frame. As an example, reinforcing ribs 27 are provided on the supporting back portion 26, as shown in Figure 2.
The shelves 40 can be fixedly connected to the supporting side portion 24 and/or the supporting back portion 26 in any well-known manner, including, but not limited to, riveting, welding, screwing etc. Riveting is preferred for rigidity and safety reasons.
The supporting frame 20 and the shelves 40 can be made of any suitable material with sufficient rigidity. Aluminium alloy materials are preferable due to their high strengths and light weights, and these materials are free from magnetic interference and thus will not influence the stored weights for a long time. The supporting side portion and the supporting back portion of the supporting frame 20 may have a plate-like structure, or are provided as supporting legs which are interconnected. In a preferred example, the supporting frame 20 is made up with supporting legs plus a glass sideplate, which ensures visability of the interior of the storing device 100 and the cleanness of the stored weights, and avoids the weights from being contaminated by dirt and dusts. Alternatively, the supporting frame 20 is provided with an openable door at the weight accessing side T1.
The large-mass-weight storing device of the invention described as above can achieve a compact and integrated storage of the large-mass-weights, has a compact structure and a small footprint, and makes it convenient for the operator to operate, which economizes manpower and improves efficiency. The provision of the weight retaining structure makes it possible that the weights can be stored on the shelves securely and reliably, without significant displacement or even falling down.
Corresponding to the large-mass-weight storing device 100 in Figures 1 and 2, in Figure 3, the large-mass-weight 10 comprises a gripping portion 12 by means of which the  weight 10 can be gripped for storing and picking up and other operations. In an example of the invention, the gripping portion 12 is provided approximate to an upper end of the weight, and is formed as a recess which is recessed into an outer surface of weight 10.
In the illustrated embodiment, the gripping portion 12 is recessed into the weight 10 from its outer surface in its entire circumference. However, it can be understood by a skilled in the art that this is not necessary and that the gripping portion 12 can be recessed into the weight 10 at a plurality of positions on the outer surface which are spaced from each other in a circumferential direction. Alternatively, the gripping portion 12 can also be provided as protrusions which protrude from the outer surface, as long as it achieves the reliable gripping and lifting of the weight 10. This makes the large-mass-weights easy to be picked up, to be held and to be handled, while avoiding the weights to be damaged during the handling process. This is particularly advantageous for the large-mass-weights.
Alternatively but not limited, as shown in the drawings, the weight 10 comprises a protrusion 14 extending out from its top surface and a notch 16 recessed into its opposite bottom surface, the protrusion 14 and the notch 16 being shaped and sized so that, when the weights 10 are stacked and stored in the layers one on top of another in the storing device as shown in Figure 1, the protrusion 14 of the weight 10 on a lower shelf 40 can pass through the through-hole 46 in the weight storing position 42 of an upper shelf 40 right above the lower shelf 40, to be received in the notch 16 of the weight 10 on the upper shelf 40, which ensures that the weights 10 are stable relative to each other, prevents the weights 10 from rocking and moving, and at the same time avoids a risk that a plane-to-plane contact will scrape the surfaces of the weights 10.
The storing device 100 for the substantially cylindrical weights has been described as above, and a storing device 200 for the substantially cubic weights will be described in the following. The substantially cylindrical weights are handled in a gripped manner, while the substantially cubic weights are handled in a lifted-from-bottom manner.
As same as the large-mass-weight storing device 100 in Figure 1, the large-mass-weight storing device 200 in Figure 4 can be used for storing cubic weights 210 in a plurality of layers which are spaced from each other in the vertical direction, weight storing  positions 242 and thus the weights 210, in each layer, are arranged in the longitudinal direction L. Different from the structure in Figure 1 in which the weights 10 in each layer share the same shelf 40, in the large-mass-weight storing device 200 of Figure 4, each weight 210 is provided with its own weight storing bracket 240. The weight storing bracket 240 for each weight 210 is secured independently to a supporting frame 220 and, in particular, is secured independently to a supporting back plate 226 of the supporting frame 220. Different from the supporting frame 20 in Figure 1, the supporting frame 220 has a simple structure which only comprises a supporting base 222 and the supporting back plate 226.
As known in Figures 4 and 5, the weight storing brackets 240 in each layer are arranged in the longitudinal direction L and are secured independently to the supporting back plate 226. Each weight storing bracket 240 is adapted for storing one cubic weight 210.
Figure 6 is an enlarged view of the weight storing bracket 240 of the large-mass-weight storing device 200. The weight storing bracket 240 defines a L shape and comprises a base portion 242 adapted to be secured to the supporting back plate 226 and a supporting portion 244 which extends out from the base portion 242 towards the weight accessing side T1 when the weight storing bracket 240 is secured on the supporting back plate 226. The supporting portion 244 comprises a supporting surface 245 adapted for supporting the weight 210 and two or more grooves 246 formed into the supporting surface 245, each groove 246 being closed at one end 246a approximate to the base portion 242 and open at the opposite end 246b so that a teeth-like structure can enter and retract out of the grooves 246 from the end 246b.
Further, the supporting surface 245 is provided with protruding edges 248 protruding upwards at its opposite sides of the longitudinal direction, so as to prevent the weight 210 from moving in the longitudinal direction L.
Similarly, the weight storing bracket 240 may also comprise a detector (not shown) which can be aligned or otherwise mated with a corresponding detector provided on a weight picking up device, the detector being configured for indicating that the weight picking up device has reached a position in a predetermined position relationship with respect to the target weight storing position 242.
In order to store the weight 210 into the large-mass-weight storing device 200, the weight 210 is held at its bottom surface by the weight picking up device with teeth and delivered to a position right above the desired weight storing bracket 240. The fact that the detector on the weight picking up device is aligned or otherwise mated with the detector on the weight storing bracket 240 indicates that the weight 210 has been located right above the weight storing bracket 240, and lowering the weight picking up device together with the weight 210 would place the weight 210 onto the desired weight storing bracket 240. At the same time, the teeth of the weight picking up device fall into the corresponding grooves 246 of the weight storing bracket 240, for example, the outmost two grooves 246. After the weight 210 is placed into position, retracting the teeth of the weight picking up device from the corresponding grooves 246 from the end 246b in the transverse direction T from the back side T2 towards the weight accessing side T1 will finish the storage of the weight 210.
In order to retrieve the weight 210 from the large-mass-weight storing device 200, the teeth of the weight picking up device are inserted from the end 246b at the weight accessing side T1 into the corresponding grooves 246, until tips of the teeth come into contact with the closed end 246a of the grooves 246, then the weight picking up device and thus the weight 210 are lifted apart from the weight storing bracket 240. At a distance of the weight 210 from the supporting surface 245 of the weight storing bracket 240, moving the weight 210 in the transverse direction T towards the weight accessing side T1 will finish the retrieval of the weight.
The detail description has been given with regard to the large-mass- weight storing devices  100 and 200 according to the invention, and an integral large-mass-weight handing device will be described with reference to Figure 7, which is called as a “large-mass-weight handling module” herein.
In actual applications, especially in case that the “large-mass-weightsāin the invention are high-precision standard mass weighs, it is often required that a plurality of standard mass weights be used together, as a unit. For example, 10 50KG weights are used together to provide a 500KG standard mass weight to be compared with a weight to be measured. Due to the 500KG standard mass weight including 10 50KG weights, use of the 500KG standard mass weight involves loading and unloading the 50KG weights  many times, which is time consuming and causes a waste of manpower. Providing the “large-mass-weight handling module” of the invention as shown in Figure 6 intends to alleviate the above disadvantages and facilitate the loading and unloading operations of the large-mass-weights.
The “large-mass-weight handling module” has its own proper mass or intrinsic mass which is equal to the mass of one large-mass-weight. The “large-mass-weight handling module” can carry a predefined number of large-mass-weights, so that the “large-mass-weight handling module” with the predefined number of large-mass-weights also has a constant or invariant mass.
As an example, the large-mass-weight handling module 300 is designed, in Figure 6, to carry nine cylindrical 50KG high-precision large-mass-weights, and thus comprises nine weight storing positions 342, with the intrinsic mass of its module frame itself being 50KG and the total mass of the fully loaded module being 500 KG. This is particularly advantageous as a temporary frame when the 500KG weight is frequently used as a measurement datum. In this case, the frame and the nine 50KG weights which the frame carries are operated as a unit, such as transporting, lifting etc., which saves operating time and manpower required substantially, compared to handling 10 50KG weights.
Due to the intrinsic mass of the frame being 50KG, the large-mass-weight handling module 300 has a mass of 200KG if 3 50KG weights are loaded in the frame, and they can be used as a standard mass of 200KG. 20KG weights can also be loaded as desired if the weight retaining structure is appropriately sized.
The large-mass-weight handling module 300 mainly comprises a module frame 320 consisting of a main supporting base 322 and supporting side portions 324, and the weights loaded thereon (not shown in the drawings) .
The main supporting base 322 may be in the form of a supporting plate and comprises nine weight storage positions 342 and nine weight retaining structures as described above, for storing and supporting functions. As same as Figures 1 and 2, the weight retaining structure is in the form of a circular recess, and the size of the circular recess depends on the outer diameter of the cylindrical weights to be stored.
The supporting side portion 324 can be in the form of plate, or in the form of connecting rod as show in the drawings. As desired, the large-mass-weight handling module 300 may comprise one, two, three, or four supporting side portion 324. In the embodiment of Figure 6, four supporting side portions 324 in the form of the connecting rod are shown, in which three supporting side portions 324 have the same distance from the main supporting base 322 in the form of plate or have the same height, and the fourth supporting side portion 324 is much closer to the main supporting base 322, so that the supporting side portion 324 would not interfere with the storage of the weights. The supporting side portions 324 place a role of improving the rigidity of the module and providing protection.
In addition, preferably, a lifting portion can be provided on one or both of the supporting side portions 324 and the main supporting base 322 for lifting up and lowering down the entire module.
All components of the large-mass-weight handling module are made of magnetism-free stainless steel in order to provide sufficient strength, reduce magnetic effects on the stored weights, and ensure the accuracy of the stored standard mass weights.
While preferred embodiments of the invention have been described as above, the invention is not intended to be limited to the embodiments described above and shown in the drawings. Features described with reference to one embodiment are also applicable to other embodiments of the invention, and features of different embodiments can be combined to form new embodiments. Various modifications and variants can be made to the above embodiments by the skilled in the art without departing from the spirit and scope of the invention defined by the following claims.

Claims (17)

  1. A large-mass-weight storing device comprising a supporting frame for providing a plurality of weight storing positions for storing a plurality of weights, the plurality of weight storing positions being arranged in a plurality of layers which are spaced from each other in a vertical direction, and the weight storing positions in each layer being arranged in a first horizontal direction substantially perpendicular to the vertical direction, wherein the large-mass-weight storing device defines a weight accessing side and an opposite back side in a second horizontal direction substantially perpendicular to the vertical direction, the large-mass-weight storing device opens at the weight accessing side so that the weights can be stored and taken out, and each weight storing position comprises a weight retaining structure for maintaining the stored large-mass-weight in the weight storing position.
  2. The large-mass-weight storing device according to claim 1, wherein the stored large-mass-weights are cylindrical weights, the weight storing positions in each layer are provided by a common shelf, and the weight retaining structure for each weight storing position is a circular recess recessed into the shelf, the circular recess having an inner diameter corresponding to an outer diameter of the stored large-mass-weight.
  3. The large-mass-weight storing device according to claim 1 or 2, wherein the number of the weight storing positions in different layers is same or different, and/or the weight storing position is adapted for storing one or more mass classes of large-mass weighs, and/or the larger mass weights are stored in the weight storing positions in the lower layer in the vertical direction.
  4. The large-mass-weight storing device according to claim 2, wherein the weight retaining structure further comprises a through-hole extending through the shelf in the corresponding weight storing position.
  5. The large-mass-weight storing device according to claim 4, wherein the circular recess is a stepped circular recess which comprises a plurality of circular recess portions provided in a stepped manner, the plurality of circular recess portions each having different inner diameters corresponding to the outer diameters of large-mass-weights with different mass classes.
  6. The large-mass-weight storing device according to claim 1, wherein the stored large-mass-weights are cubic weights, and each weight storing position comprises a separate L-shaped weight holding bracket, the weight holding bracket being configured for storing one weight and being configured to be secured to the supporting frame.
  7. The large-mass-weight storing device according to claim 6, wherein the weight holding bracket comprises a base portion adapted to be secured to the supporting frame and a supporting portion extending from the base portion and providing a supporting surface, the supporting portion comprising a plurality of grooves recessed into the supporting surface, and each groove comprising a closed end approximate to the base portion and an opposite open end at the weight accessing side.
  8. The large-mass-weight storing device according to claim 7, wherein each weight holding bracket comprises protruding edges protruding upwards from the supporting surface of the supporting portion at its opposites sides in the longitudinal direction.
  9. The large-mass-weight storing device according to any one claims 1-8, wherein each weight storing position is provided with a detector for ensuring that the large-mass-weight can be stored properly and can be taken out accurately.
  10. The large-mass-weight storing device according to claim 9, wherein the detector is an optical detector.
  11. The large-mass-weight storing device according to any one claims 1-10, wherein the supporting frame comprises a supporting base, and a supporting side portion and/or a supporting back portion for supporting the shelves.
  12. The large-mass-weight storing device according to claim 11, wherein the supporting frame is made of an alumnum alloy material.
  13. A large-mass-weight handling module comprising a frame having an intrinsic mass and a plurality of large-mass-weights supported by the frame,
    wherein the intrinsic mass is equal to the mass of one large-mass-weight, and the large-mass-weight handling module with the plurality of large-mass-weights has a predetermined total mass, and
    wherein the frame comprises a supporting base, the supporting base providing a plurality of the weight storing positions for the plurality of large-mass-weights, and each weight storing position being provided with a weight retaining structure for maintaining the stored large-mass-weight in the corresponding weight storing position.
  14. The large-mass-weight handling module according to claim 13, wherein the large-mass-weights are 50KG or 20KG standard mass weights.
  15. A cylindrical large-mass standard weight having a standard mass and comprising a cylindrical body, the cylindrical body comprising a positioning protrusion extending out from a top end surface of the cylindrical body and a positioning notch recessed into the cylindrical body from a bottom surface of the cylindrical body, wherein the positioning protrusion of the large-mass-weight stored on an shelf in a lower layer can be received in the positioning notch of the large-mass-weight stored on an shelf in an upper layer.
  16. The cylindrical large-mass standard weight according to claim 15, wherein the cylindrical large-mass standard weight is 50KG high-precision standard mass weight.
  17. The cylindrical large-mass standard weight according to claim 15 or 16, wherein the cylindrical large-mass standard weight is adapted to be stored in a large-mass-weight storing device according to any one of claims 1-5 and 9-12.
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CN206114098U (en) * 2016-09-05 2017-04-19 中国计量科学研究院 Automatic system of putting of getting of weight

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