JP2546782Y2 - Force reference machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a force reference device, and more particularly, to a force reference device used as a reference for power between nations or between countries, or for calibrating the force of a JIS force meter or an electric load cell.

[0002]

2. Description of the Related Art Generally, a force reference machine is provided with a first cylinder ram device comprising a cylinder and a first ram, and a reference force generating section having a weight suspended from the first ram. ing. The reference force generating unit has a function of changing the magnitude of the force transmitted to the force test main unit that detects expansion and contraction of the test body to which the force is applied.

In order to be able to apply forces of various magnitudes to the force test body, the weight suspended so as to lower the first ram must be set with various weights. For this purpose, the weight is composed of a large weight composed of a plurality of heavy weight elements having a large weight and a small weight composed of a plurality of small weight elements having a small weight.

[0004]

However, in the conventional force reference machine, even when a small weight is weighted, only a specific small weight element is selectively weighted in the same manner as when a large weight is weighted. I couldn't do that.

[0005] For this reason, the weight of the weight suspended so as to lower the first ram could not be defined in fine units.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art and to provide a force reference machine capable of adding and removing various weight elements of any weight in any combination.

[0007]

In order to achieve the above object, the present invention provides a first cylinder ram device comprising a cylinder and a first ram, and a weight suspended from lowering the first ram. A second cylinder ram device including a reference force generation unit having a cylinder and a second ram, a head that moves up and down in accordance with the elevation of the second ram, and a test that holds a specimen between the head and the fixed unit. A force test body for detecting expansion and contraction of a test body to which a force is applied, a first space surrounded by a cylinder of the first cylinder ram and a first ram, and the second cylinder ram A hydraulic pressure generator for generating a pressure transmitted to the first ram and the second ram via a pipe communicating between the first cylinder and the second space surrounded by the second ram; To process the measured results of expansion and contraction A force reference apparatus comprising a processing unit,
The weight is composed of a small weight portion composed of a plurality of small weight elements having a small weight and a large weight portion composed of a plurality of heavy weight elements having a large weight. A plurality of stoppers are fixed at intervals to a fishing rod vertically provided at the bottom of the force transmitting unit for lowering the force transmitting unit, and each of the small weight elements passes through the fishing rod at each of the stoppers. A lifting arm that is slidably supported by a support that is erected on the horizontal frame of the reference force generating unit, and that can be lifted by engaging the corresponding small weight element from below. And

[0008]

The weight of the weight is transmitted to the first ram via the force transmitting portion, and acts to lower the first ram. A fishing rod is suspended from the bottom of the force transmitting portion, and a plurality of stoppers are fixed to the fishing rod at intervals.

When a specific small weight element is to be weighted so as to lower the first ram, the small weight element is stopped and placed on the corresponding stopper. Further, when releasing the specific small weight element from being weighted so as to lower the first ram, the lifting arm corresponding to the small weight element is slid on the column to lift up the small weight element, Release the engagement with the stop. As a result, a specific small weight element can be selectively weighted.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a force reference machine according to the present invention will be described below with reference to FIGS.

FIG. 5 shows the entire structure of the force reference machine. FIG.
In the above, the force reference machine includes a reference force generator 2 for adjusting a force to be applied to the test body 90, a force test main body 4 for applying a force to the test body 90 and detecting expansion and contraction of the test body 90. ,
The apparatus includes a hydraulic pressure generating section 6 for generating pressure and a data processing section 10 for processing a result of expansion and contraction of the test body 90 detected by the force test main body section 4.

The reference force generator 2 is provided with a first cylinder ram device 40 including a cylinder 42 and a first ram 41. A first space 47 surrounded by the cylinder 42 of the first cylinder ram 40 and the first ram 41 is formed.

A fishing rod 61 is provided on the bottom portion 46 of the first cylinder ram device 40 in the reference force generating unit 2, and a weight 60 having various weights is detachably suspended from the fishing rod 61. Further, the bottom 43 is fixed to the frame 43,
Is fixed to a saddle portion 44 at the top of the first cylinder ram device 40. A hemispherical pivot 45 is attached to the lower side of the saddle portion 44, whereby the first ram 4 is moved.
1 can be engaged with the saddle portion 44 in a comfortable posture. This frame forms a force transmitting portion 150 for lowering the weight of the weight 60 to lower the first ram.

The force test body 4 has a cylinder 82 and a second
A second cylinder ram device 80 comprising a ram 81;
A head 83 that moves up and down in response to the raising and lowering of the ram 81, and specimen holding sections 86 and 87 that hold a specimen 90 between the head 83 and the fixing sections 84 and 85 are provided. A saddle portion 91 is provided above the second cylinder ram device 80. A pivot 95 is attached to the lower side of the saddle portion 91 so that the pivot 95 can be engaged with the second ram 81 in a reasonable posture. A frame 9 extending downward at the lateral end of the saddle portion 91
2 is fixed, and the frame body 92 has a threaded portion 92a at the lower portion.
And penetrates the head 83. The head 83 is screwed with the threaded portion 92 a of the frame 92 so that the distance between the head 83 and the fixed portion 84 or the distance between the head 83 and the fixed portion 85 can be adjusted according to the length of the test body 90. After this adjustment, the test body 90 is locked to the threaded portion 92a. When measuring the tensile force of the specimen 90, the specimen 9
0 is set between the head 83 and the fixed portion 85, and is set between the head 83 and the fixed portion 85 when measuring the compression force.

Further, a displacement detector (not shown) is provided in the force test main body 4, and a change in the length of the test body 90 is measured by the displacement detector. The measurement result by the displacement detector is sent to the data processing unit 10.

Next, the general operation of the force reference machine shown in FIG. 5 will be described.

The magnitude of the pressure generated by the hydraulic pressure generator 6 is controlled and adjusted by a hydraulic pressure controller 12. The pressure transmitted from the hydraulic control unit 12 is transmitted to the pipe 8. The pipe 8 is the first
First space 47 of cylinder ram 40 and second cylinder ram 8
0 and the second space 88. Therefore, the same pressure is transmitted to the first space 47 and the second space 88.

The first ram 41 is lifted by the pressure transmitted to the first space 47 by the pipe 8. Thereby, the first ram 41 rises so as to lift the saddle portion 44 upward. On the other hand, the frame 43 and the bottom 4
6, the weight of the weight 60 is loaded. Thereby, the first ram 41 moves in the descending direction. And
The first ram 41 stops at a position where the pressure transmitted by the pipe 60 and the weight of the weight 60 are balanced.

The second ram 81 is lifted by the pressure transmitted to the second space 88. With the upward movement of the second ram 81, the head 83 rises integrally with the frame body 92. One of the test body holding portions 86 is fixed to the fixing portion 84 and the other is fixed to the head 83. Therefore, the test body 90 held by the test body holding portion 86 is raised by raising the head.
Is applied with a tensile force. Similarly, the specimen holding unit 87
Since one is fixed to the fixing portion 85 and the other is fixed to the head 83, a compressive force is applied to the test piece 90 held by the test piece holding section 87.

Next, referring to FIGS. 3 and 4, the weight of the weight 60 in the force reference machine according to the present embodiment will be described in detail.

FIG. 4 shows the general outline of the weight 161. In FIG. 4, the left half shows that all the weight elements are weight-loaded on the fishing rod, and the right half has been released from all the weight elements being weight-loaded on the fishing rod. Indicates the status. The weights are the top weight element 130, the bottom weight element 138, and the weight elements 130 and 13
. Are constituted by a plurality of weight elements 133, 136,.

Further, the bottom 4 of the force transmitting portion 150 for causing the weight of the weight 60 to be loaded to lower the first ram 41.
A fishing rod 61 is vertically provided at 6. At the lower end of the fishing rod 61, a key portion 61a having a hemispherical spherical surface is formed. Also, the horizontal frame portion 169 and the bottom portion 1 of the reference force generating portion 2
A support 145 is provided between 46.

A vertically movable lifting portion 140 having a lateral portion 141 engageable from below at the lower portion of the lowermost weight element 140 is provided on the column 142. Prop 14
The reference numeral 2 stands on the bottom 146 of the reference force generator 2. The lifting unit 140 is connected to the drive unit 14 mounted on the bottom 146.
3 to move up and down. A transmission mechanism for transmitting the power of the driving device 143 to the lifting unit 140 is included in the support 142.

Next, FIG. 3 shows an enlarged portion of each weight element. In FIG. 3, as in FIG. 4, the left half portion shows a state in which all weight elements are weight-loaded on one of the fishing rods, and the right half portion shows that all weight elements are all on one of the fishing rods. This shows a state where the weight load is released.

In FIG. 3, the uppermost weight element 130 is vertically spaced apart from the upper key part 131 and the lower key part 132.
The upper key portion 131 has a spherical portion 131a, and the lower key portion 132 has a spherical portion 132a. Spherical part 131
“a” can be engaged with a key portion 61 a of the fishing rod 61 having a hemispherical spherical surface. The weight element 133 below the uppermost weight element 130 has an upper key portion 134 and a lower key portion 135, the upper key portion 134 has a spherical portion 134a, and the lower key portion 135 has a spherical portion 135a. . Similarly, the weight element 136 below the weight element 133 has an upper key portion 137 and the like, and the upper key portion 137 and the like has a spherical portion 137a and the like. For the uppermost weight element 130, the lower key part 135 is the spherical part 1
35a. The spherical portion 132a can engage with the spherical portion 134a, and the spherical portion 135a can engage with the spherical portion 137a. Each of the weight elements 130, 133,... Has a hole 150, 151,. The spherical elements 134a, 137 of the upper keys 134, 137,... Of the weight elements 133, 136,.
are the other weight elements 130, 1 located immediately above
.. Are located in the holes 150, 151,.

When the lifting section 140 is at the lowermost position as shown in the left half of FIG. 4, the spherical section 131a of the upper key section 131 of the uppermost weight element 130 has a hemispherical spherical surface. Since it is engaged with the key portion 61a, it is suspended in the direction of gravity with a reasonable posture. Further, the spherical portion 134a of the upper key portion 134 of the weight element 133 located below is engaged with the spherical portion 132a of the lower key portion 132 of the other weight element 130 located immediately above from above. The located weight element 133 is the other weight element 130 located above.
Is suspended in the direction of gravity with a reasonable posture. In this manner, each of the weight elements 130, 133, 136,... Is suspended in the direction of gravity with a reasonable posture.

When the lifting unit 140 moves from the lowermost position shown in the left half of FIG. 4 to an upper position,
This lifting section 140 lifts the lowermost weight element 140,
Further, the lowermost weight element 140 lifts the weight element immediately above. In this way, depending on the position of the lifting section 140, the weight element above any of the weight elements is
1 can be determined whether to apply weight load.

Next, the small weight 160 of the weight 60 in the force reference machine according to the present embodiment will be described in detail with reference to FIGS.

In FIGS. 1 and 2, the weight 60 is composed of a small weight 160 composed of small weight elements 162, 163, 164, and 165, and a large weight element 131,.
8 and a heavy weight 161 composed of eight. Mass 16
1 is located below the small weight 160.

The weight 60 is moved so that the first ram 41 is lowered.
The force transmitting portion 150 for transmitting the weight of the first ram 41 to the first ram 41 is formed by the frame 43 or the like. Bottom 46 of force transmission unit 150
Is provided with a fishing rod 61. The fishing rod 61 has a plurality of stoppers 61a, 61b, 61c, 61 at intervals.
d and 61e are fixed. Stops 61a, 61b,
61c, 61d, and 61e have a hemispherical shape that opens downward.

Columns 171 and 172 are provided on the horizontal frames 169 and 170 of the reference force generating unit 2.

Each of the small weight elements 162, 163,
Lifting arms 173, 174, 1 corresponding to 164, 165
75 and 176 are provided. Lifting arms 173, 17
5 is slidably supported at one end by a left support 171, and the other end is engaged with the small weight elements 162 and 164 from below so as to be liftable. Similarly, lifting arms 174, 176
Is slidably supported at one end by a right column 172, and the other end is engaged with the small weight elements 163 and 165 from below so as to be liftable.

Lifting arms 173, 174, 175, 176
Can be automatically moved by hydraulic cylinders 180, 181, 182, 183 attached to the columns 171 and 172.

Small weight elements 162, 163, 164, 16
When the first ram is weighted so as to descend, the 5 is stopped by the corresponding stoppers 61e, 61d, 61c, and 61b and placed. In order not to load only a specific small weight element, for example, only the small weight element 163,
The corresponding lifting arm 174 is slid up on the column 145 to lift this small weight element 163. Small weight element 1
When the 63 is released from engagement with the stopper 61d, the weight of the small weight element 163 is not transmitted to the force transmitting section 150.

Next, the operation of the present embodiment will be described.

When only a specific small weight element, for example, only the small weight element 163 is weighted so as to lower the first ram 41, the small weight element 163 is attached to the corresponding stopper 61.
Place on d. Further, when a specific small weight element, for example, the small weight element 164 is released from being weighted so as to lower the first ram, the small weight element 164 is released.
Is lifted by sliding the lifting arm 175 corresponding to the small weight element 164 to the column 171 to lift the small weight element 164.
4 is released from engagement with the stopper 61c.

According to the structure of this embodiment, the fishing rod 61 is provided with a plurality of stoppers 61e, 61d, 61c, 6 at intervals.
1b, and fixing portions 61e, 61d, 61c, 61
b through the fishing rod 61 and each of the small weight elements 162, 16
3, 164, and 165, and columns 171 provided on the horizontal frame portions 169 and 170 of the reference force generation unit 2.
Lifting arm 1 slidably supported by 172 and capable of being lifted by being engaged with the corresponding small weight element from below.
With the provision of 73, 174, 175, 176, certain small weight elements can be weighted selectively or in combination. As a result, the weight of the weight 60 suspended so as to lower the first ram 41 can be defined in fine units.

[0038]

[Effects of the Invention] As described above, according to the present invention,
A plurality of stoppers are fixed to the fishing rod at intervals, so that each small weight element can be placed through the fishing rod in each stopper, and a support provided on the horizontal frame part of the reference force generating part Is provided with a lifting arm that is slidably supported and can be lifted by being engaged with the corresponding small weight element from below, so that a specific small weight element can be selectively or in combination. .

[Brief description of the drawings]

FIG. 1 is a schematic view showing an entire weight of a force reference machine according to the present invention.

FIG. 2 is a view showing that a small weight in the force reference machine according to the present invention can be selectively added and removed.

FIG. 3 is a cross-sectional view showing a part of the weight in the force reference device according to the present invention, wherein the left half shows a state in which all weight elements are weight-loaded on the fishing rod, and the right half A portion of the figure shows a state where all the weight elements are released from being weight-loaded on the fishing rod.

FIG. 4 is a schematic diagram showing the entire weight of the force reference device according to the present invention;

FIG. 5 is an overall configuration diagram of an embodiment of a force reference device according to the present invention.

[Explanation of symbols]

 2 Reference force generator 4 Force test main body 6 Hydraulic pressure generator 8 Piping 10 Data processing unit 40 First cylinder ram device 41 First ram 42 Cylinder 46 Bottom 47 First space 60 Weight 61 Fishing rod 80 Second cylinder ram 81 Second ram 82 Cylinder 83 Head 90 Specimen 130 Uppermost weight element 131 Upper key part 131a Spherical part 132 Lower key part 132a Spherical part 138 Lowermost weight element 140 Lifting part 141 Side part 145 Support 150 Force transmitting part 160 Light weight Weight 161 Large weight 162 Small weight element 163 Small weight element 164 Small weight element 165 Small weight element 169 Horizontal frame section 170 Horizontal frame section 171 Prop 172 Prop 173 Lifting arm 174 Lifting arm 175 Lifting arm 176 Lifting arm 180 Hydraulic cylinder 181 Hydraulic pressure Cylinder 182 Hydraulic cylinder 1 3 hydraulic cylinder

Claims (1)

(57) [Scope of request for utility model registration] 1. A reference force generator having a first cylinder ram device comprising a cylinder and a first ram, a weight suspended from the first ram, and a cylinder and a second ram. A second cylinder ram device, a head that moves up and down in accordance with the elevation of the second ram, and a specimen holding section that holds the specimen between the head and the fixed section; A force test main body for detecting expansion and contraction, a first space surrounded by the cylinder of the first cylinder ram and the first ram, and a second space surrounded by the cylinder of the second cylinder ram and the second ram; A hydraulic pressure generator for generating a pressure transmitted to the first ram and the second ram via a pipe communicating between the first and second rams, and a data processor for processing a measurement result of the expansion and contraction of the test body detected by the force test main body. A force reference machine, wherein the weight has a small weight. A small weight part composed of a number of small weight elements and a large weight part composed of a plurality of large weight elements having a large weight, and a force for loading the weight of the weight to lower the first ram. A plurality of stoppers are fixed to the fishing rod vertically suspended from the bottom of the transmission part at intervals, and each small weight element is placed on each of the stoppers through the fishing rod to generate the reference force. A force reference machine characterized by comprising a lifting arm slidably supported by a column erected on a lateral frame portion of the portion and capable of being lifted by being engaged with a corresponding small weight element from below.