JP2016161330A - Test device and thermostat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To develop a test device designed to improve a composite test device for installing a test object in the test chamber of a thermostat and carrying out a tensile test, the test device not susceptible to the occurrence of freezing or dew condensation in the inside of an open hole through which a rod, etc. is penetrated, or in its vicinity.SOLUTION: There exist spaces 210, 215 on the outside of rod insertion open holes 20, 21 of a thermostat 2 and at the position of axial extension of the rod insertion open holes 20, 21, with the surroundings of the spaces covered by an upper covering member 200 and a lower covering member 201. A nitrogen gas is supplied from the inner circumferential side of the rod insertion open holes 20, 21 into the rod insertion open holes 20, 21. The nitrogen gas enters the spaces 210, 215 enclosed by the upper covering member 200 or the lower covering member 201 from an outside opening 26 of the rod insertion open holes 20, 21.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a test apparatus for performing a test such as a material test under a desired environment. The present invention also relates to a thermostatic device for performing a material test or the like in an internal test chamber.

2. Description of the Related Art Material testing apparatuses that test basic characteristics of metal materials and rubber are known. Examples of the material testing apparatus include a tensile tester, a compression tester, a shear tester, a hardness tester, and an impact tester.
The tensile tester includes a pair of gripping tools, a moving device that moves one gripping tool, an extension meter that detects the amount of movement of the gripping tool, and a load meter that detects a tensile load. In the tensile test, both ends of a sample (test object) molded into a predetermined shape are gripped by the pair of gripping tools described above, and one gripping tool is moved away from the other by a moving device. The elongation of the sample in the meantime is measured with an extensometer, the tensile load applied to the sample is measured with a load meter, and it is used as a material for creating a stress / strain diagram of the sample.

  There are also known test apparatuses for testing the performance of materials in a low temperature environment or a high temperature environment. For example, in the case of an apparatus for performing a tensile test, a constant temperature apparatus is provided, and a test object is installed in a test chamber inside the constant temperature apparatus to perform a tensile test. Hereinafter, a test apparatus including a thermostatic apparatus is referred to as a “composite test apparatus” in order to distinguish it from a normal test apparatus.

  The thermostat disclosed in Patent Document 1 is used as a component member of a combined test apparatus, and a through-hole through which a test jig such as a gripper is passed is provided in the upper part of the thermostat.

A composite type tensile testing device, which is one of the composite testing devices, is composed of a thermostatic device and a pulling device that pulls a test object. The pulling device has a pair of gripping tools, a moving device for moving one gripping tool, an extension meter for detecting the amount of movement of the gripping tool, and a load meter, like the above-described tensile testing machine. .
In the tension device used in the composite type tensile test device, the moving device is provided with a rod. A gripping tool is attached to the tip of the rod.

In the composite type tensile test apparatus, the above-described rod is inserted into the through-hole of the thermostatic bath, and the gripping tool is installed in the test chamber of the thermostatic apparatus.
In the composite type tensile test apparatus, each of the pair of grippers is in the test chamber of the thermostatic apparatus, and the sample is gripped in the test chamber.
Then, the rod is moved to pull the sample in the test chamber, and the elongation of the sample and the load applied to the sample are measured.

The thermostat used in the combined test apparatus is provided with a through hole for inserting a rod or the like as described above.
Therefore, a seal member is provided between the outer periphery of the rod and the inner wall of the through hole in order to prevent outside air from entering through the through hole and leakage of air in the test chamber from the through hole.

JP 2000-314692 A

The tensile test is widely used as a test for basic performance of a metal material, rubber or the like, but in recent years, there is a demand for a thin member such as a film as a target of the tensile test.
For example, there have been cases in which an insulating material for a lithium ion battery, which is a popular energy device in recent years, a power generation film of a fuel cell, and the like are subjected to a tensile test.
Since the insulating material of the lithium ion battery and the power generation film of the fuel cell are extremely thin, the tensile load applied to the sample during the tensile test is extremely small.
Therefore, the sliding resistance between the rod and the seal member when moving the rod during the tensile test may not be negligible.

For example, when a tensile test is performed on a metal material, rubber, or the like, the metal material is molded into a size or shape standardized by JIS or the like, and the test is performed using this as a test object. For this reason, the test object has a considerable cross-sectional area, and the tensile load applied to reach the fracture is considerably large.
On the other hand, the insulating material of the lithium ion battery has a certain amount of stress until it breaks, but the cross-sectional area of the sample is small, so that the load applied to the sample during the tensile test is extremely small.

  For this reason, when the insulation material of a lithium ion battery is a test object, the sliding resistance of the seal material cannot be ignored, and the test must be performed with the seal member between the rod and the inner wall of the through hole removed. You may not get.

  However, when the tensile test is performed in a state where the seal member between the rod and the inner wall of the through hole is removed, a number of adverse effects may occur.

One of them is the problem of freezing.
That is, the energy device may perform a tensile test at a temperature range of about minus 40 degrees Celsius to plus 100 degrees Celsius. For example, when the test is performed at minus 40 degrees Celsius, low-temperature air in the test chamber leaks to the outside, and the outside air may be cooled to condense and further freeze. Therefore, when the test is performed in a low temperature environment, the inside of the through hole and the vicinity thereof may freeze.
For this reason, there are cases in which a tensile test cannot be performed continuously in the conventional combined test apparatus. That is, the tensile test is rarely performed on only one sample. In many cases, a plurality of samples are prepared and continuously tested to obtain an average value or a standard deviation.
Although a single tensile test is completed in a short time, it takes a certain amount of time to perform a tensile test on a plurality of samples. For this reason, it has been necessary to interrupt the work in the middle of the test and to remove the icing in the conventional test apparatus.

  Further, the durability test may be performed in a state where a certain load is applied to the sample. In other words, after a sample is exposed to a harsh environment, a certain tensile force is applied to the sample and the sample is left for a long time to check its change. Has a great impact on sex. However, there are cases where this type of test cannot be performed on an energy device or the like with a conventional test apparatus.

In addition, with the conventional test apparatus, it may be difficult to perform the fatigue test.
The fatigue test is to examine the number of times of repetition until a specimen is repeatedly stressed to break, and usually requires a period of one week or more. Since the conventional test apparatus is difficult to continuously use in a low temperature environment, it may be difficult to perform a fatigue test in a low temperature environment.

  In addition, the durability test of the fuel cell power generation membrane or the like may be performed in a high-temperature and high-humidity environment such as 90 degrees Celsius and 90 percent relative humidity. A large amount of condensation may occur due to air leakage and being cooled by outside air. Large amounts of condensation can cause equipment failure.

  The present invention pays attention to the above-mentioned problems of the prior art, and is a test apparatus (composite test apparatus) that is unlikely to cause icing or dew condensation in or near the through hole and can be used continuously for a long time. It is an issue to provide. Moreover, this invention makes it a subject to provide the thermostat desirable to employ | adopt as a composite test device.

  Invention of Claim 1 for solving an above-mentioned subject has a thermostat and an external force grant device which gives external force to a test object, and the thermostat has a heat insulation field surrounded by a heat insulation wall, A test chamber that is a part or all of the heat insulation region and can form a predetermined environment, and a through hole that communicates the inside of the heat insulation region and the outside of the thermostatic device. The external force applying device is in contact with the DUT. An action part and a drive part for operating the action part, the action part of the external force applying device is in the test chamber, the drive part is outside the heat insulating region, and a part of the external force applying device penetrates the through hole. In the test apparatus in which the drive unit and the action unit are connected to each other, there is a space outside the through-hole and in the position where the through-hole is extended in the axial direction, and has a covering member that covers the periphery of the space, so A part of the apparatus is covered with the covering member and has gas supply means. Than air of the outside air or test chamber in the cover member covered with said space by the gas supply means is a testing device, characterized in that it is possible to supply the gas of a low dew point.

“Constant temperature device” is a device having only a function of adjusting a temperature environment called “a constant temperature bath” among those skilled in the art, and adjusts both a temperature environment and a humidity environment called “a constant temperature and humidity chamber”. It is a general term for devices having functions. The “constant temperature device” includes a device having only a function of adjusting only the humidity environment.
The test apparatus according to the present invention includes a constant temperature apparatus and an external force applying apparatus as constituent elements, and is a combined test apparatus.
As in the prior art, the thermostat is composed of a heat insulating area surrounded by a heat insulating wall, a test chamber that is a part or all of the heat insulating area and capable of forming a predetermined environment, and the inside of the heat insulating area and the outside of the thermostatic apparatus. Through-holes communicating with each other.
The external force imparting device has, for example, an action part that comes into contact with a test object such as a gripper, and a drive part that operates the action part. The action part of the external force application device is in the test chamber, the drive part is outside the heat insulating region, and a part of the external force application device passes through the through-hole of the thermostat and the drive part and the action part are connected.
In the test apparatus of the present invention, there is a space outside the through hole and at a position where the through hole is extended in the axial direction. And in the test apparatus of this invention, it has the covering member which covers the circumference | surroundings of this space, and a part of external force provision apparatus is covered with the said covering member.
Moreover, the test apparatus of this invention has a gas supply means, and can supply gas with a dew point lower than the outside air or the air in a test chamber in the space covered with the covering member by the gas supply means.
In the test apparatus of the present invention, a gas having a dew point lower than that of the outside air or the air in the test chamber is supplied into the space covered with the covering member by the gas supply unit during the test. Therefore, the periphery of the opening outside the through hole is filled with a low dew point gas, and the through hole and the outside are shielded by the low dew point gas. In the test apparatus of the present invention, the inside and outside of the heat insulation region are substantially shielded by the low dew point air.
In the test apparatus of the present invention, a gas atmosphere with a low dew point is formed in the vicinity of the opening on the outside of the through hole. Therefore, icing or condensation is unlikely to occur near the outside opening of the through hole.
In addition, since the action part of the external force application device is in the test chamber and the drive unit is outside the heat insulation region, a part of the external force application device straddles the test chamber and the heat insulation region. There is a case where the temperature of the portion that is transmitted through the applying device and outside the heat insulating region of the external force applying device decreases.
However, in the present invention, a part of the external force imparting device is covered with a covering member, and the inside of the external force imparting device is in a gas atmosphere with a low dew point. It is prevented.

  According to a second aspect of the present invention, the external force applying device includes a rod that connects the action portion and the drive portion, the rod moves in the axial direction, and the covering member is stretchable in the axial direction of the through hole. The test apparatus according to claim 1, wherein a part of the test apparatus is attached to the external force applying apparatus side and expands and contracts according to the movement of the rod.

The external force imparting device employed in the test apparatus of the present invention has a rod that connects the action portion and the drive portion as described in the section of the prior art, and the rod moves in the axial direction.
Further, the covering member employed in the test apparatus of the present invention has elasticity in the axial direction of the through hole, and part of the covering member is attached to the external force applying apparatus side and expands and contracts according to the movement of the rod.
For this reason, in the present invention, at least the periphery of the rod located around the opening outside the through hole is covered with a covering member, and the inside becomes a gas atmosphere with a low dew point. Prevents icing and icing.
Moreover, in the test apparatus of this invention, a cover member has a stretching property in the axial direction of a through-hole, and one part is attached to the external force provision apparatus side, and is expanded-contracted according to a movement of a rod.
For this reason, even if the rod suddenly moves due to the test object breaking or the like, the covering member follows the rod and covers the periphery of the rod to prevent condensation and icing.

  A third aspect of the present invention is the test apparatus according to the first or second aspect, wherein a part of the covering member is attached to the external force applying apparatus side by a magnet.

  In the test apparatus of the present invention, the cover member can be easily attached and detached.

  According to a fourth aspect of the present invention, the gas supply means supplies gas from the inner peripheral side of the through hole or the heat insulating region side of the thermostatic device, and the gas is covered with the covering member via the through hole. The test apparatus according to claim 1, wherein the test apparatus reaches a space.

  In the test apparatus of the present invention, the gap between the rod or the like and the inner wall of the through hole is filled with the low dew point gas, and the heat insulating region and the outside are shielded with the low dew point gas.

  According to a fifth aspect of the present invention, in the through hole, there is a subchamber region having a cross-sectional area perpendicular to the axis of the through hole in a direction perpendicular to the other, and the low dew point gas is in the subchamber region. The test apparatus according to claim 1, wherein the test apparatus is supplied.

In the test apparatus of the present invention, there is a sub-chamber region where the cross-sectional area in the direction perpendicular to the axis of the through hole is larger than the others. Here, a rod or the like is inserted into the through-hole, but the sub-chamber region has a larger cross-sectional area in the direction perpendicular to the axis of the through-hole than other parts, so there is always a gap around the rod or the like. . In the present invention, a low dew point gas is supplied to the subchamber region. Therefore, at least the surrounding space such as the rod formed by the sub-chamber region is filled with a low dew point gas, and the inside and outside of the heat insulating region are shielded by the low dew point air in the sub chamber region. Accordingly, it is possible to prevent the air in the test chamber from leaking out and the outside air from entering the test chamber.
The gas with a low dew point once enters the subchamber region, and the pressure and flow velocity are stabilized in the subchamber region. And since the above-mentioned gas will flow to the exterior side or the heat insulation area | region side after that, the said gas will flow equally to the circumference | surroundings, such as a rod, and can wrap a rod etc. uniformly with the said gas.

  According to a sixth aspect of the present invention, the thermostatic device has an air conditioner unit, and circulates air between the test chamber and the air conditioner unit to maintain the test chamber in a desired environment. 6. The heat insulation region side is open to a region on the downstream side in the air flow direction with respect to the DUT installation region where the DUT is installed. 6. This is a testing device.

The air conditioner unit and the test room may be housed in a common housing, or may have separate housings and be connected by a duct or the like.
In the test apparatus of the present invention, the through-hole formed in the thermostatic apparatus opens to a region on the downstream side in the air flow direction on the heat insulation region side of the test object installation region where the test sample is installed. Yes.
For this reason, even if the gas supplied from the gas supply means flows into the heat insulation region of the thermostat, the flowing gas does not diffuse into the DUT installation region and hardly affects the test environment.

  The invention according to claim 7 has a heat insulating region surrounded by a heat insulating wall, and a test chamber which is a part or all of the heat insulating region and can form a predetermined environment, In the thermostatic apparatus having a through hole communicating between the inside and outside of the heat insulating region, there is a space outside the through hole and at a position where the through hole is extended in the axial direction, and has a covering member that covers the periphery of the space. A thermostat having a supply means, and capable of supplying a gas having a dew point lower than that of outside air or air in a test chamber into the space covered with the covering member by the gas supply means. is there.

The present invention relates to a thermostatic device, and is used as a constituent member of a combined test apparatus.
Also in the thermostat of the present invention, the inside and outside of the heat insulating region are substantially shielded by air having a low dew point. Also in the test apparatus of the present invention, a gas atmosphere with a low dew point is formed in the vicinity of the outer opening of the through hole.
Therefore, icing and condensation are unlikely to occur near the outside opening of the through hole.

  According to an eighth aspect of the present invention, the covering member has elasticity in the axial direction of the through hole, has a fixing means for fixing a part of the covering member to another member, and covers the member according to the movement of the other member. The thermostatic device according to claim 7, wherein the thermostat expands and contracts.

In the high temperature apparatus of the present invention, the covering member has elasticity in the axial direction of the through hole. And it has a fixing means which fixes one part to another member, and a covering member expands / contracts according to the movement of another member.
Therefore, even when the rod or the like suddenly moves due to a breakage of the DUT, the covering member follows the rod and covers the periphery of the rod or the like to prevent condensation or icing.

  The air conditioner section of the thermostatic device has an air discharge side for blowing air into the test chamber and an air suction side for sucking air in the test chamber. The test chamber is provided in a part of the heat insulation area, and is located outside the test chamber. It is desirable that there is an air flow passage partitioned by a wall, the air flow passage communicates with the air suction side of the air conditioner unit, and the through hole is opened in the air flow passage.

  In this aspect, there is an air flow passage partitioned by a wall outside the test chamber, and the air flow passage communicates with the air suction side of the air conditioner unit. Therefore, the air flow in the air flow passage is a one-way state that flows from the test chamber side to the air conditioner unit side. In the test apparatus of this aspect, the through-hole which communicates the inside and outside of the heat insulation region is opened in the air flow passage. Therefore, the gas supplied into the through-hole from the inner peripheral side of the through-hole and flowing into the heat insulating region of the thermostatic device proceeds along the air flow in the air flow passage, and is on the DUT side. Does not spread and hardly affects the test environment.

The test apparatus of the present invention hardly causes icing or condensation in the through hole or in the vicinity thereof, and can be used continuously for a long time.
The thermostat of the present invention can be used as a combined test device by combining with an external force applying device such as a tension device. And this test apparatus is hard to produce icing and dew condensation, and can be used continuously for a long time.

It is a perspective view of the test device of an embodiment of the present invention, and is a perspective view in the state where the door of the thermostatic device was closed. It is a perspective view of the test apparatus shown in FIG. 1, and is a perspective view in the state which removed the cover member and opened the door of the thermostat. It is the cross-sectional perspective view of the thermostat main body of the test apparatus shown in FIG. 1, and the cross-sectional perspective view of a cover member. It is a disassembled perspective view inside the constant temperature apparatus main body of the test apparatus shown in FIG. It is a longitudinal cross-sectional view of the thermostat main body in the state which mounted | wore the cover member of the test apparatus shown in FIG. 1, and sectional drawing of the air-conditioner part connected to a thermostat main body. It is sectional drawing which cut | disconnected the thermostat main body in the state which mounted | wore the cover member of the test apparatus shown in FIG. 1 from the direction different from FIG. It is an expanded sectional view of the top | upper surface part and bottom face part of a thermostat main body in the state which mounted | wore with the covering member of the test apparatus shown in FIG. It is a disassembled perspective view of the top | upper surface part of the thermostat main body of the test apparatus shown in FIG. It is sectional drawing from the same direction as FIG. 5 in the state which put the holding tool in the thermostat main body of the test apparatus shown in FIG. It is sectional drawing from the same direction as FIG. 6 in the state which put the holding tool in the thermostat main body of the test apparatus shown in FIG. It is sectional drawing of the covering member vicinity of the test apparatus shown in FIG. 1, (a) is sectional drawing immediately after starting a tensile test, (b) is a cross section when time passes after starting a tensile test. FIG. It is sectional drawing of the covering member vicinity of the test apparatus of other embodiment of this invention, (a) is sectional drawing immediately after starting a tension test, (b) is time elapsed after starting a tension test. It is sectional drawing at the time of doing. It is sectional drawing of the cover member vicinity of the test apparatus of further another embodiment of this invention, (a) is sectional drawing just after starting a tensile test, (b) is time after starting a tensile test. It is sectional drawing at the time of progress. It is sectional drawing of the cover member vicinity of the test apparatus of further another embodiment of this invention. It is sectional drawing of the cover member vicinity of the test apparatus of further another embodiment of this invention. It is sectional drawing of the cover member vicinity of the test apparatus of further another embodiment of this invention. It is sectional drawing of the cover member vicinity of the test apparatus of further another embodiment of this invention. It is sectional drawing of the test apparatus of further another embodiment of this invention. It is the cross-sectional perspective view of the thermostat apparatus main body of the test apparatus of further another embodiment of this invention, and the perspective view of a cover member. It is a disassembled perspective view of the inside of the thermostat main body of the test apparatus shown in FIG. It is an expanded sectional view of the top | upper surface part and bottom face part of a thermostat apparatus body in the state which mounted | wore with the covering member of the test apparatus shown in FIG. It is sectional drawing in the state which put the grip into the thermostat apparatus main body of the test apparatus shown in FIG.

Embodiments of the present invention will be further described below.
The test apparatus 1 of this embodiment is a composite test apparatus, and more specifically, a composite type tensile test apparatus.
The test apparatus 1 includes a thermostatic device 2 and an external force applying device 3. Moreover, the thermostat 2 employ | adopted by this embodiment has the thermostat main body 5 and the air conditioner part 6 isolate | separated, and is an independent apparatus, respectively. As shown in FIG. 3, an upper-side covering member 200 and a lower-side covering member 201 are attached to the thermostatic device body 5.
Moreover, the test apparatus 1 of this embodiment has the external force provision apparatus mounting base 130 and the installation stand 131 as auxiliary equipment.

The thermostatic device main body 5 of the thermostatic device 2 is a housing covered with a heat insulating wall 10 as shown in FIG. 3, and has a main body side housing portion 7 and a door 9.
The main body side housing part 7 has a top wall 11, a bottom wall 12, a back wall 13, left and right side walls 15 and 16, and the front side is open. A door 9 is attached to the opening of the main body side housing 7.
Therefore, by closing the door 9, the main body side casing portion 7 becomes a closed space.
Inside the thermostatic device main body 5 is a heat insulating region 17 surrounded by the top wall 11, the bottom wall 12, the back wall 13, the left and right side walls 15 and 16, and the door 9.

The body-side casing 7 of the thermostatic device body 5 is provided with four portions that communicate with the outside.
That is, rod insertion through holes 20 and 21 are provided in the top wall 11 and the bottom wall 12.
The back wall 13 is provided with an air discharge side through hole 22 and an air suction side through hole 23.

The rod insertion through hole 20 provided in the top wall 11 is a hole having a circular cross-sectional shape as shown in FIGS. The rod insertion through hole 20 is provided in the top wall 11 and extends in the vertical direction, and its axis substantially coincides with the center line of the test chamber 8 described later.
The rod insertion through hole 20 penetrates the top wall 11, and one opening is opened in the heat insulating region 17. The other opening of the rod insertion through-hole 20 is open to the outside of the thermostatic device body 5.
That is, the rod insertion through hole 20 has a heat insulation region side opening 18 and an external side opening 26.
As a characteristic configuration of the rod insertion through-hole 20, a sub-chamber region 27 having a larger cross-sectional area than the rod insertion through-hole 20 is provided in the intermediate portion.

As shown in FIGS. 3, 5, 6, and 7, the sub chamber region 27 has a larger inner diameter than the heat insulating region side opening 18 and the outer side opening 26. The inner diameter of the subchamber region 27 is about 1.2 to 5 times as large as the heat insulating region side opening 18 and the outer side opening 26. Further, the inner diameter of the subchamber region 27 is at least 1 cm larger than the inner diameter of at least the smaller one of the heat insulating region side opening 18 and the outer side opening 26.
The vertical length of the sub-chamber region 27 is 1/6 to 3/4 of the thickness of the top wall 11, and more preferably 1/4 to 1/2. In the present embodiment, the vertical length of the sub-chamber region 27 is about one third of the thickness of the top wall 11. The position in the height direction of the sub-chamber region 27 is a position slightly approaching the outside of the top wall 11.
In this embodiment, the inner diameter of the portion other than the sub-chamber region 27 is the same for any portion. In the following description, a portion other than the sub chamber region 27 of the rod insertion through hole 20 may be referred to as a small diameter portion.

  A pipe 28 is embedded in the top wall 11 as shown in FIGS. 5 and 7, and an end of the pipe 28 is open in the subchamber region 27. The pipe 28 is a gas supply means for supplying a gas having a dew point lower than the outside air or the air in the test chamber 8 into the rod insertion through hole 20.

The specific structure of the rod insertion through-hole 20 is as shown in FIG. 8, and a notch 30 is provided in a part of the top wall 11 of the main body side housing part 7 and a part of a partition member 46 described later. A block-shaped fitting piece 42 is fitted into the notch 30.
That is, the notch 30 is constituted by a semi-cylindrical part 31 and a holding part 33. The holding | maintenance part 33 is a notch part of a substantially rectangular parallelepiped shape. The semi-cylindrical portion 31 is a portion further cut away from the central portion of the rear side 34 of the holding portion 33, and the shape of the cut-out portion is a semi-cylindrical shape.
In addition, a sub-chamber constituting portion 35 having a larger inner diameter than other portions is provided on the inner periphery of the semi-cylindrical portion 31.

The fitting piece 42 is a substantially rectangular parallelepiped, and is formed in a shape that matches the holding portion 33 of the notch 30 described above.
A semi-cylindrical portion 36 is provided on one side of the fitting piece 42. A sub-chamber component 37 (FIG. 3) is formed in the semi-cylindrical portion 36.
The fitting piece 42 is provided with a plate 47 constituting a part of the partition member 46. The fitting piece 42 is fitted into the notch 30, and the semi-cylindrical portion 36 of the fitting piece 42 and the semi-cylindrical portion 31 on the top wall 11 side are matched to form the cylindrical rod insertion through hole 20. Yes.

The structure of the rod insertion through-hole 21 provided in the bottom wall 12 is the same as the rod insertion through-hole 20 provided in the top wall 11, penetrates the bottom wall 12, and the rod insertion through-hole in the middle part. A sub-chamber region 27 having a cross-sectional area larger than 21 is provided. A pipe (gas supply means) 28 is embedded in the bottom wall 12, and an end of the pipe 28 is open in the subchamber region 27.
Since the structure of the rod insertion through hole 21 is the same as that of the rod insertion through hole 20 provided in the top wall 11, the same members are denoted by the same reference numerals and detailed description thereof is omitted.

Next, the air discharge side through hole 22 and the air suction side through hole 23 formed in the back wall 13 will be described.
The air discharge side through hole 22 and the air suction side through hole 23 are holes through which air flows, and both are formed by inserting large-diameter pipes 38 and 39 through the back wall 13.
Both the pipes 38 and 39 penetrate the back wall 13. The open ends 40 and 41 on the heat insulating region 17 side of the tubes 38 and 39 are on the same plane as the back wall 13.
On the other hand, the open ends 43 and 45 on the outer side of the tubes 38 and 39 protrude to the back side of the thermostatic device body 5.

The air discharge side through-hole 22 is provided in the back wall 13 and extends in the horizontal direction, and its axis is substantially orthogonal to the center line of the test chamber 8 described later.
The air suction side through hole 23 is provided at a position shifted directly below the air discharge side through hole 22.

Next, the internal structure of the heat insulation region 17 will be described. A partition member 46 is provided inside the heat insulating region 17, and the heat insulating region 17 is divided into the test chamber 8 and the flow path forming portion 55 by the partition member 46.
The shape of the partition member 46 is as shown in FIGS. 3 and 4, and includes a top surface facing portion 50, a back surface facing portion 51, and a bottom surface facing portion 52. In addition, the partition member 46 is formed with the end blocking portion 53 by bending the free end sides of the top surface facing portion 50 and the bottom surface facing portion 52 outward.

The partition member 46 is installed at a position that is parallel to the inner wall of the heat insulating region 17 and that is spaced from the inner wall of the heat insulating region 17.
That is, the top surface facing portion 50 of the partition member 46 faces the top surface wall 11 of the heat insulating region 17 in parallel with a certain distance. Similarly, the back surface facing portion 51 faces the back surface wall 13, and the bottom surface facing portion 52 faces the bottom wall 12. The end blocking portion 53 of the partition member 46 is attached to the opening side of the main body side housing portion 7.
Therefore, a flow path forming portion 55 is formed by the inner wall of the heat insulating region 17 and the partition member 46.

Large holes 56 and 57 are provided in the top surface facing portion 50 and the bottom surface facing portion 52 of the partition member 46 as shown in FIGS.
The sizes of the large holes 56 and 57 are equivalent to the rod insertion through holes 20 and 21 described above. The central axes of the large holes 56 and 57 coincide with the central axes of the rod insertion through holes 20 and 21. That is, the axes of the rod insertion through hole 20, the large holes 56 and 57, and the rod insertion through hole 21 are vertical and coincide with each other.

The top surface facing portion 50 and the bottom surface facing portion 52 of the partition member 46 are provided with many small holes 58 for ventilation. The ventilation small holes 58 provided in the top surface facing portion 50 and the bottom surface facing portion 52 are uniformly provided in the top surface facing portion 50 and the bottom surface facing portion 52. In this embodiment, the top surface facing portion 50 and the bottom surface facing portion 52 are made of punching metal, and the opening of the punching metal functions as a small hole 58 for ventilation.
A small hole 60 for ventilation is also provided in the rear surface facing portion 51 of the partition member 46. The small holes 60 for ventilation provided in the back surface facing portion 51 are intensively provided in the central portion of the back surface facing portion 51.

A connection duct 61 connects between the air discharge side through hole 22 of the main body side housing 7 and the region where the small hole 60 of the back surface facing portion 51 of the partition member 46 is provided. The connection duct 61 has a tapered outer appearance, the inner diameter of the portion connected to the air discharge side through hole 22 is small, and the inner diameter of the side connected to the partition member 46 is large.
Since the air discharge side through hole 22 and the area where the small hole 60 of the back surface facing portion 51 is provided are connected by the connection duct 61, the air discharge side through hole 22 is connected to the back surface facing portion 51. The small holes 60 communicate with each other, and do not communicate with the small holes 58 for ventilation provided in the top surface facing portion 50 and the bottom surface facing portion 52.
On the contrary, the air suction side through-hole 23 communicates only with the ventilation hole 58 provided in the top surface facing part 50 and the bottom surface facing part 52, and does not communicate with the small hole 60 of the back surface facing part 51.

As described above, in this embodiment, the flow path forming portion 55 is provided inside the heat insulating region 17 and outside the test chamber 8, and the flow path forming portion 55 is further divided into two flow paths by the connection duct 61. Yes. That is, as shown in FIG. 5, the flow path forming portion 55 is connected to the small hole 60 of the back surface facing portion 51 through the connection duct 61 from the air discharge side through hole 22, and the forward air flow passage 110 leading to the test chamber 8. The return side air flow passage 111 connecting the small hole 58 communicating with the test chamber 8 (the small hole 58 provided in the top surface facing portion 50 and the bottom surface facing portion 52) and the air suction side through hole 23. I know.
As will be described later, during the test, air sequentially passes through the air discharge side through hole 22, the connection duct 61, and the small hole 60 to enter the test chamber 8, and from the test chamber 8 to the small hole 58, the flow path forming portion. 55 (return side air flow passage 111) and the air suction side through hole 23 are sequentially discharged from the thermostatic device body 5. Therefore, in the test apparatus 1 of the present embodiment, the return-side air flow passage 111 is always downstream of the test chamber 8.

Next, the air conditioner unit 6 will be described. The air conditioner unit 6 has a series of air flow paths 63 inside as shown in FIG. The air flow path 63 is covered with a heat insulating wall 64.
In the present embodiment, the lower opening in the drawing is the air return port 65, and the upper opening functions as the air outlet 66. A precooler 67, a main cooler 68, and a heater 70 are installed in the air flow path 63 in order from the air return port 65. A blower 71 is provided between the heater 70 and the air outlet 66.
The air conditioner unit 6 introduces air from the air return port 65, passes the precooler 67, the main cooler 68, and the heater 70, adjusts the air to a predetermined temperature, and discharges it from the air outlet 66.

Next, the external force applying device 3 will be described.
The external force imparting device 3 is a tensile tester. As shown in FIG. 2, the external force applying device 3 has a base portion 72 and a portal frame 73.
The portal frame 73 has a guide rail (not shown), and an elevating bar (driving unit) 75 is engaged with the guide rail of the portal frame 73.
An upper rod 76 is provided at the lower part of the elevating bar 75, and an upper gripping tool (action portion) 77 is provided at the tip of the upper rod 76. In other words, an upper grip 77 as an action part is attached to an elevating bar 75 as a driving part via an upper rod 76.

Further, the base portion 72 is provided with a lower rod 78, and a lower gripping tool (action portion) 79 is provided at the tip of the lower rod 78.
The external force imparting device 3 includes a moving device for moving the upper gripping tool 77 upward, an extension meter for detecting the amount of movement of the gripping tool, and a load meter for detecting the tensile load, as in a known tensile testing machine. (Not shown).

Next, the upper side covering member 200 and the lower side covering member 201 will be described.
The upper side covering member 200 is a bellows whose upper and lower sides communicate with each other.
The upper side covering member 200 has an annular upper flange 202 at one end, as shown in FIGS. An annular lower flange 203 is also provided at the other end of the upper cover member 200. The upper flange 202 and the lower flange 203 are connected by a bellows 204.
Therefore, the upper side covering member 200 is a member that is open at both ends and communicated at both ends, and is hollow inside.
The upper side covering member 200 is expanded and contracted by the action of the bellows 204.
Magnets 205 are attached to the upper flange 202 and the lower flange 203.

  As shown in FIG. 3, the lower-side covering member 201 is a cylinder with a short overall length, is a member having both ends open and communicating at both ends, and the inside is a cavity.

Next, auxiliary equipment will be described. The test apparatus 1 according to the present embodiment includes an external force applying device mounting table 130 and an installation frame 131 as auxiliary equipment.
The external force applying device mounting table 130 is a mere table, and includes a mounting plate 132 on which the external force applying device 3 is mounted and a leg portion 133 that supports the mounting plate 132 in a hollow state.

The installation base 131 includes a pedestal portion 135 and a telescopic guide 136. The pedestal 135 is a substantially cubic body and has a certain amount of weight.
The telescopic guide 136 is disposed on the upper surface of the pedestal portion 135, and two telescopic rods 137a and 137b are provided in parallel. The telescopic rods 137a and 137b have a fixed side member and a movable side member, and the movable side portion is movable in a linear direction with respect to the fixed side member. Therefore, the extension rods 137a and 137b can be extended and contracted by moving the movable side portion.
In the telescopic guide 136, the fixed side members of the telescopic rods 137 a and 137 b are fixed to the upper surface of the pedestal portion 135. And if the full length of the expansion-contraction hooks 137a and 137b is extended, a movable side part will protrude from the base part 135 in the shape of a cantilever.

Next, the relationship between each member which comprises the test apparatus 1 is demonstrated.
As described above, the test apparatus 1 of the present embodiment is configured by the thermostatic device 2 and the external force applying device 3, and the thermostatic device 2 further includes the thermostatic device body 5, the upper side covering member 200, and the lower side covering member 201. And the air conditioner unit 6.
The thermostat main body 5 and the air conditioner unit 6 constituting the thermostat 2 are connected by two ducts 80 and 81 as shown in FIG.
That is, the pipe 39 constituting the air suction side through hole 23 of the thermostatic device body 5 and the air return port 65 of the air conditioner unit 6 are connected by the return side duct 81.
Further, the pipe 38 constituting the air discharge side through hole 22 of the thermostatic apparatus body 5 and the air outlet 66 of the air conditioner unit 6 are connected by the forward duct 80.
Therefore, the heat insulation region 17 of the thermostatic device main body 5 and the air flow path 63 of the air conditioner unit 6 constitute a series of circulation flow paths.
Further, heat insulating materials 501 and 502 are respectively applied to the air discharge side duct including the forward side duct 80 and the air suction side duct including the return side duct 81, and energy loss is reduced.

As shown in FIGS. 1 and 2, the external force applying device 3 is placed on a mounting plate 132 of the external force applying device mounting table 130.
The thermostatic device main body 5 of the thermostatic device 2 is installed in a space surrounded by the portal frame 73 of the external force applying device 3.
More specifically, as shown in FIGS. 1 and 2, an installation stand 131 is arranged on the back side of the external force applying device 3, and the thermostatic device main body 5 is installed by the movable side portion of the telescopic guide 136 of the installation stand 131. It is supported in a state of protruding from the pedestal part 135 of 131. The thermostatic device body 5 is supported in a cantilever manner by a telescopic guide 136 of the installation base 131 and is inserted into the portal frame 73 of the external force applying device 3.
The thermostatic device main body 5 is supported in a hollow manner by the installation base 131 and is disposed in the portal frame 73 of the external force applying device 3, and is not in contact with the base portion 72 of the external force applying device.

The upper rod 76 of the external force applying device 3 passes through the rod insertion through hole 20 of the thermostatic device main body 5, and the upper gripping tool 77 at the tip reaches the center of the test chamber 8.
More specifically, the upper rod 76 communicates the rod insertion through-hole 20 of the thermostatic device body 5 with the large hole 56 provided in the top surface facing portion 50 of the partition member 46, and the upper gripping tool 77 is connected to the rear surface. It reaches the vicinity of the height of the small hole 60 of the facing portion 51.

Further, the lower rod 78 of the external force applying device 3 passes through the rod insertion through hole 21 of the thermostatic device main body 5, and the lower gripping tool 79 at the tip is near the center of the test chamber 8 and is slightly lower than the center. The position is close to the facing portion 52.
More specifically, the lower rod 78 communicates the rod insertion through-hole 21 of the thermostatic device body 5 and the large hole 57 provided in the bottom facing portion 52 of the partition member 46, and the lower gripping tool 79 is connected to the rear surface. It reaches the vicinity of the height of the small hole 60 of the facing portion 51.

As shown in FIGS. 1, 7, and 11, the upper side covering member 200 is mounted between the opening end outside the rod insertion through-hole 20 of the thermostatic device body 5 and the elevating bar (drive unit) 75. ing.
As described above, the rod insertion through-hole 20 passes through the top wall 11, one opening (heat insulation region side opening 18) opens to the heat insulation region 17, and the other opening (external side opening 26) is a thermostatic device. It opens to the outside of the main body 5.
In the present embodiment, the lower flange 203 of the upper cover member 200 is attached around the opening of the external opening 26. The lower flange 203 is fixed to the top surface of the thermostatic device body 5 by a magnet 205.
Further, the upper flange 202 of the upper cover member 200 is fixed to the lower surface of the elevating bar (drive unit) 75 with a magnet 205.

As described above, the upper side covering member 200 is a member that is open at both ends and communicated at both ends, and the inside thereof is a cavity. Therefore, the upper side covering member 200 is outside the rod insertion through-hole 20 and the rod insertion through-hole 20. The space 210 in the region extending in the axial direction is covered with the upper side covering member 200.
The upper rod 76 passes through the space 210 covered with the upper side covering member 200.
In other words, in this embodiment, there is a space 210 in which the upper rod 76 is disposed outside and above the through hole 20 for inserting the rod. This space 210 is at a position where the rod insertion through hole 20 is extended in the axial direction.
And in this embodiment, there exists the upper side covering member 200 which covers the circumference | surroundings of the space 210 where the upper rod 76 in the position which extended the through-hole 20 for rod insertion to the axial direction is arrange | positioned, and is a part of the external force provision apparatus 3. The upper rod 76 is covered with the upper side covering member 200.

Further, as shown in FIG. 7, the lower cover member 201 is mounted between the open end of the rod insertion through-hole 21 on the lower side of the thermostatic device body 5 and the base portion 72 of the thermostatic device body 5. Yes.
As described above, the rod insertion through hole 21 penetrates the bottom wall 12, one opening opens to the heat insulating region 17, and the other opening (external opening 26) opens to the outside of the thermostatic device body 5. ing.
In the present embodiment, one end of the lower cover member 201 is attached around the outer opening 26.
Further, the other end side of the lower side covering member 201 is fixed to the base portion 72 of the thermostatic device main body 5.
As described above, the lower-side covering member 201 is a member that is open at both ends and communicated at both ends, and the inside thereof is a cavity. The space 215 in the region extending in the axial direction is covered with a lower side covering member 201.
The lower rod 78 passes through the space 215 covered with the lower side covering member 201.
In other words, in this embodiment, there is a space 215 in which the lower rod 78 is disposed outside and below the rod insertion through-hole 21. This space 215 is located at a position where the rod insertion through hole 21 is extended in the axial direction.
And in this embodiment, there exists the lower side covering member 201 which covers the circumference | surroundings of the space 215 where the lower rod 78 in the position which extended the through-hole 21 for rod insertion to the axial direction is distribute | arranged, and is a part of the external force provision apparatus 3. The lower rod 78 is covered with the lower side covering member 201.

  In the present embodiment, both ends of the sample (test object) are held by the upper gripping tool 77 and the lower gripping tool 79. Therefore, the sample is placed in the test chamber 8 and particularly in a region between the upper gripping tool 77 and the lower gripping tool 79. Therefore, in the test apparatus 1 of the present embodiment, the area between the upper gripping tool 77 and the lower gripping tool 79 becomes the DUT installation area 115.

  Further, a nitrogen cylinder 86 is connected to a pipe (gas supply means) 28 embedded in the top wall 11 and the bottom wall 12 of the thermostatic apparatus body 5 through a pressure reducing valve (not shown) and an opening / closing valve 85. As is well known, the nitrogen gas supplied from the nitrogen cylinder 86 has a very low dew point. The dew point of nitrogen gas supplied from the nitrogen cylinder 86 is lower than the dew point of the atmosphere, and further lower than the environmental temperature in the test chamber 8.

Next, the operation of the test apparatus 1 of this embodiment will be described.
When performing a tensile test using the test apparatus 1 of this embodiment, a sample (test object) is formed into a predetermined shape. Then, the door 9 of the thermostatic apparatus body 5 is opened, and both ends of the sample are gripped by the upper gripping tool 77 and the lower gripping tool 79. Then, the door 9 of the thermostatic device body 5 is closed.
Thereafter, the on-off valve 85 is opened to supply nitrogen from the nitrogen cylinder 86 to the pipe (gas supply means) 28, and nitrogen is introduced from the end of the pipe 28 into the sub-chamber region 27 of the rod insertion through holes 20 and 21.
In addition, the air conditioner unit 6 is activated to supply air adjusted to a predetermined temperature to the test chamber 8, and the inside of the test chamber 8 is maintained in a predetermined temperature environment.
Then, the external force imparting device 3 is activated, the upper rod 76 is raised at a constant speed, a tensile load is applied to the sample (test object), and it breaks. Then, record the relationship between the elongation and load of the sample.

  The flow of air in the constant temperature device 2 (the constant temperature device main body 5 and the air conditioner unit 6) during the test is as shown by the arrows in FIG. That is, by starting the blower 71 of the air conditioner unit 6, the air in the heat insulation region 17 is introduced into the air conditioner unit 6 from the air suction side through hole 23 of the thermostatic device body 5 through the return side duct 81. And the air introduce | transduced into the air conditioner part 6 flows through the air flow path 63 of the air conditioner part 6, and is adjusted to desired temperature in the meantime. Then, the adjusted air is introduced into the air discharge side through hole 22 of the thermostatic device body 5 via the forward duct 80.

  Here, the air discharge side through-hole 22 is directly connected to the portion where the small hole 60 of the rear surface facing portion 51 of the partition member 46 is formed by the connection duct 61. That is, the air flow passage 110 that is connected from the air discharge side through hole 22 to the small hole 60 via the connection duct 61 and reaches the test chamber 8 is an air flow path that is blocked from other areas of the flow path forming portion 55. It has become. Therefore, the air supplied from the air conditioner unit 6 to the thermostatic device main body 5 is supplied into the test chamber 8 only from the small hole 60 provided in the back surface facing portion 51 of the partition member 46.

  Since air is successively supplied into the test chamber 8 from the small holes 60 provided in the back surface facing portion 51, the inside of the test chamber 8 becomes a high-pressure atmosphere, and the top surface facing portion 50 and the bottom surface facing portion of the partition member 46. Air flows from a small hole 58 provided in 52 into a flow path forming portion 55 formed outside the test chamber 8. Here, the flow path forming portion 55 communicating with the small hole 58 provided in the top surface facing portion 50 and the bottom surface facing portion 52 is a part of the return side air flow passage 111 and is provided in the back wall 13 of the heat insulating region 17. The air suction side through-hole 23 is communicated. The air suction side through hole 23 communicates with the air return port 65 of the air conditioner unit 6, and the air return port 65 tends to have a negative pressure due to the function of the blower 71.

  Therefore, all of the air that has flowed from the small hole 58 into the return side air flow passage 111 of the flow path forming portion 55 flows toward the air suction side through hole 23 side. That is, the air flow in the flow path forming portion 55 (return side air flow passage 111) is in a one-way state toward the air suction side through hole 23.

During the test, as described above, nitrogen gas is continuously introduced from the nitrogen cylinder 86 into the sub-chamber region 27 of the rod insertion through holes 20 and 21. That is, a gas having a dew point lower than that of the air in the test chamber 8 is continuously supplied from the pipe 28 serving as a gas supply means into the through holes 20 and 21 for inserting the rods.
The standard of the gas supply amount is such that nitrogen gas always overflows slightly from both the heat insulation region side opening 18 and the external side opening 26, and depends on the inner diameters of the rod insertion through holes 20, 21 and the diameter of the rod. Determined. The gas supply amount is about 3 L / min to 30 L / min, and usually about 5 L / min to 15 L / min.

Here, since the upper rod 76 is inserted into the rod insertion through hole 20 on the upper side, the gap 112 between the small diameter portion of the rod insertion through hole 20 and the outer peripheral portion of the upper rod 76 is narrow. The same applies to the rod insertion through hole 21 on the lower side. Since the lower rod 78 is inserted, the gap 112 between the small diameter portion of the rod insertion through hole 21 and the outer peripheral portion of the lower rod 78 is also narrow. .
On the other hand, since the subchamber region 27 has a larger inner diameter than other portions, the subchamber region 27 is filled with nitrogen gas.

The nitrogen gas flows through a narrow gap between the upper rod 76 and the lower rod 78 and the small diameter portion of the rod insertion through holes 20 and 21, and a part of the nitrogen gas is provided on the outside opening 26 of the rod insertion through holes 20 and 21. To the outside.
Nitrogen gas is supplied from the embedded pipe 28 to the sub-chamber region 27 with a certain flow rate, and the sub-chamber region 27 is inserted between the upper rod 76 and the lower rod 78 for inserting the pipe 28 and the rod. Since there is a larger space than the other regions of the through holes 20, 21, the dynamic pressure of nitrogen gas disappears in the subchamber region 27, and the pressure in the subchamber region 27 becomes uniform. After the pressure becomes uniform, nitrogen gas enters the gap 112 between the upper rod 76, the lower rod 78, and the small diameter portions of the rod insertion through holes 20, 21. Therefore, the flow rate of nitrogen gas flowing through the gap 112 is made uniform in the circumferential direction.

Further, the center lines of the upper rod 76 and the lower rod 78 do not necessarily coincide with the center lines of the rod insertion through holes 20 and 21, and the upper rod 76 and the lower rod 78 are in relation to the rod insertion through holes 20 and 21. There may be some eccentricity, and the gap 112 may not be constant depending on the position in the circumferential direction, but the nitrogen gas flows through the gap 112 after the dynamic pressure disappears and equalizes, so the nitrogen gas It flows around the entire circumference of 76 and 78.
That is, when there is no subchamber region 27, there is a concern that nitrogen gas flows only in a wide portion of the gap 112 and nitrogen gas does not flow in a portion where the gap 112 is narrow, but by providing the subchamber region 27, The entire circumference of the rods 76 and 78 can be wrapped with nitrogen gas.

Further, as described above, the nitrogen gas flows through a narrow gap between the upper rod 76 and the lower rod 78 and the small diameter portion of the rod insertion through holes 20 and 21, and a part of the nitrogen gas flows through the rod insertion through holes 20 and 21. Although it is discharged to the outside from the external opening 26, in this embodiment, there is an upper cover member 200 in the vicinity of the external opening 26 of the rod insertion through hole 20. Similarly, a lower cover member 201 is provided in the vicinity of the external opening 26 of the rod insertion through hole 21.
Therefore, in the present embodiment, the nitrogen gas released to the outside from the rod insertion through holes 20 and 21 is transmitted from the external opening 26 of the rod insertion through holes 20 and 21 to the upper side cover member 200 or the lower side cover member 201. The enclosed spaces 210 and 215 are entered.

Explaining the upper rod 76 side, the surplus nitrogen gas fills the space between the upper rod 76 and the rod insertion through hole 20, and the excess portion is released to the outside from the external opening 26 of the rod insertion through hole 20. .
Here, in this embodiment, the vicinity of the outer opening 26 of the rod insertion through hole 20 is covered with the upper cover member 200, and the space surrounded by the upper cover member 200 is not high in airtightness. 210 is a closed space. Therefore, the surplus nitrogen gas stays in the space 210, and the space 210 surrounded by the upper side covering member 200 becomes a nitrogen atmosphere.
Further, a part of the lower rod 76 which is exposed from the thermostatic device body 5 is wrapped with nitrogen gas.

The same applies to the lower rod 78 side, and excess nitrogen gas stays in the space 215 covered with the lower-side covering member 201, and the space 215 surrounded by the lower-side covering member 201 becomes a nitrogen atmosphere.
The portion of the lower rod 78 exposed from the thermostatic device body 5 is also wrapped with nitrogen gas.

  Further, the remaining portion of the nitrogen gas enters the heat insulating region 17 from the heat insulating region side opening 18 of the rod insertion through holes 20 and 21. Here, the heat-insulating region side openings 18 of the rod insertion through holes 20 and 21 are flow path forming portions 55 formed outside the test chamber 8 and open into the return side air flow passage 111. Further, as described above, the air flow in the flow path forming portion 55 is in a one-way state toward the air suction side through hole 23. There is a large air flow in the flow path forming portion 55, and the amount of nitrogen entering from the heat insulating region side opening 18 of the rod insertion through holes 20, 21 is very small.

Therefore, all of the nitrogen gas that has entered the heat insulating region 17 from the heat insulating region side opening 18 of the rod insertion through holes 20 and 21 flows together with the air toward the air suction side through hole 23 and does not flow to the test chamber 8 side. There are many cases.
That is, the air flow in the thermostatic device main body 5 during the test reaches the small hole 60 from the air discharge side through hole 22 via the connection duct 61, and the test object in the center of the test chamber 8 is installed from the small hole 60. Region 115 is entered. Further, the air flows separately from the DUT installation region 115 in the center of the test chamber 8 to the top surface facing portion 50 side and the bottom surface facing portion 52 side of the test chamber 8, enters the vent hole 58, and returns to the air. Enter the flow path 111. Further, the air flows from the return side air flow passage 111 toward the air suction side through hole 23 and exits from the thermostatic device body 5.

  Thus, the return side air flow passage 111 is downstream of the test chamber 8 in the air flow direction. At least the return-side air flow passage 111 is downstream from the DUT installation region 115 in the test chamber 8. Therefore, the nitrogen gas that has entered the heat insulating region 17 from the heat insulating region side opening 18 of the rod insertion through holes 20 and 21 does not flow into the test chamber 8 side. At least, it does not flow into the DUT installation area 115 in the test chamber 8. Therefore, the nitrogen gas that has entered the heat insulating region 17 from the heat insulating region side opening 18 of the rod insertion through holes 20 and 21 does not affect the environment of the test chamber 8, particularly the DUT installation region 115.

The space between the rod insertion through holes 20 and 21 and the upper rod 76 and the lower rod 78 is filled with nitrogen gas. In particular, the subchamber region 27 has a thick nitrogen layer. Therefore, the heat insulation area | region 17 and the exterior are shielded by nitrogen gas. Therefore, the air in the heat insulating region 17 is difficult to leak out. Moreover, outside air is difficult to enter the heat insulating region 17.
Therefore, even if the air in the heat insulation region 17 is at a very low temperature, the air in the heat insulation region 17 does not come into direct contact with the outside air, and the outside air is rarely cooled. For this reason, the water vapor in the outside air is rarely condensed, and condensation and icing are unlikely to occur. Further, since nitrogen gas overflows around the outer opening 26 little by little, the outer opening 26 becomes a low dew point gas atmosphere, and condensation and icing are unlikely to occur.
In particular, in the present embodiment, the spaces 210 and 215 are surrounded by the upper-side cover member 200 and the lower-side cover member 201 in the vicinity of the external opening 26 of the rod insertion through-holes 20 and 21 to form a substantially closed space. . Since the spaces 210 and 215 have a nitrogen atmosphere and are difficult for outside air to enter, condensation and icing are unlikely to occur.
Nitrogen supplied from the cylinder 86 may also flow into the heat insulation region 17 side, but the nitrogen gas supplied from the cylinder 86 has an extremely low dew point of about minus 45 degrees Celsius. Even at extremely low temperatures, condensation and icing are unlikely to occur.

  Further, the upper rod 76 and the lower rod 78 are not in direct contact with the rod insertion through holes 20 and 21. Therefore, during the tensile test, the upper rod 76 or the lower rod 78 moves up or down, but resistance due to contact does not occur, and the load meter can accurately detect the tensile load applied to the sample. it can.

  When the DUT breaks, the upper rod 76 moves suddenly and changes from the state shown in FIG. 11 (a) to the state shown in FIG. 11 (b). Part) 75 is rapidly widened, but the upper side covering member 200 employed in the present embodiment has a bellows structure and expands and contracts in the axial direction. Therefore, the upper side covering member 200 follows the movement of the upper rod 76, and the nitrogen atmosphere around the upper rod 76 is maintained.

In the embodiment described above, the thermostatic device 2 is an independent device in which the thermostatic device main body 5 and the air conditioner unit 6 are separated. However, the present invention is not limited to this configuration, and employs a constant temperature device 88 in which an air conditioner unit 92 is incorporated in one heat insulating casing 91, like a test apparatus 90 shown in FIG. Also good.
In the thermostat 88 employed in the test apparatus 90 shown in FIG. 18, a heat insulating region 93 is formed by the heat insulating housing 91. A partition box 95 is provided at the center of the heat insulating casing 91, and the inside of the partition box 95 is a test chamber 96. Further, there is a space between the partition box 95 constituting the test chamber 96 and the inner wall of the heat insulating region 93, and a humidifier 97, a cooler 98, a heater 100, and a blower 101 are provided in the space. Yes. In the present embodiment, an air conditioner unit 92 is formed by a part in which these devices are incorporated.
The discharge port of the blower 101 is open in the test chamber 96.

  A large hole 116 is provided in the top surface facing portion 102 and the bottom surface facing portion 103 of the partition box 95 as in the above-described embodiment. Further, the top surface facing portion 102 and the bottom surface facing portion 103 of the partition box 95 are provided with a large number of small holes 117 for ventilation, as in the above-described embodiment.

  Also in the test apparatus 90 of the present embodiment, rod insertion through holes 20 and 21 are provided in the top wall 120 and the bottom wall 121 of the heat insulating casing 91 of the thermostatic apparatus 88. The shapes of the rod insertion through holes 20 and 21 are the same as those in the above-described embodiment. Further, the test apparatus 90 of the present embodiment also has an upper side covering member 200 and a lower side covering member 201.

  In the above-described embodiment, the example in which the two through holes 20 and 21 through which the rod is inserted is provided in the upper and lower directions, but the through hole may be provided only in either the top wall or the bottom wall. A through hole may be provided in the side wall. Moreover, you may have three or more through-holes.

  Each of the above-described embodiments is a composite type tensile tester, but the present invention is not limited to a tensile tester, and a compression tester, a shear tester, a hardness tester, an impact tester, etc. It can also be applied to.

In this embodiment, nitrogen gas is supplied to the rod insertion through holes 20 and 21 from the nitrogen cylinder 86. However, nitrogen gas is not necessarily required as long as the gas has a low dew point. For example, air from which water vapor contained or reduced by a dryer may be supplied to the rod insertion through holes 20 and 21.
The dew point of the gas needs to be at least lower than the outside air. The dew point of the gas is desirably lower than the environmental temperature in the test chamber 8.

Of the two thermostatic devices 2 and 88 described above, the thermostatic device 2 described first shows an example in which the temperature environment is adjusted but the humidity is not adjusted. On the other hand, the latter constant temperature device 88 shows an example having a function of adjusting the temperature environment and a function of adjusting the humidity environment.
The thermostatic apparatus that can be employed in the present invention is not limited to the above-described one, and may be any apparatus that can adjust either or both of temperature and humidity.

In the embodiment described above, the bellows structure is exemplified as the upper side covering member 200. However, the upper side covering member 220 having a slack as shown in FIG. It is also possible to employ the upper side covering member 221 having such elasticity due to elasticity.
In the above-described embodiment, the upper side covering member 200 wraps between the opening end outside the rod insertion through-hole 20 of the thermostatic device body 5 and the lifting / lowering bar (drive unit) 75. The present invention is not limited to this configuration, and the end portion may be opened like the upper side covering member 222 shown in FIG.
However, it is desirable that the opening area of the end portion is small, and it is desirable that the opening portion is narrow like the upper side covering member 223 shown in FIG.
The cross-sectional shape of the upper side covering member 200 and the like is arbitrary and is not limited to a circle.

In the embodiment described above, nitrogen gas is introduced from the nitrogen cylinder 86 into the sub-chamber region 27 of the rod insertion through-holes 20 and 21, but as shown in FIG. 16, the pipe 28 is connected to the upper cover member 200 and the like, Nitrogen gas or dry gas may be directly introduced into the spaces 210 and 215.
Further, as shown in FIG. 17, nitrogen gas or dry gas may be introduced from the heat insulating region side opening 18 side.

In the embodiment described above, the partition member 46 is provided in the heat insulating region 17 and divided into the test chamber 8 and the flow path forming unit 55. However, the partition member 46 is not necessarily required.
In the embodiment described above, the partition member 46 includes the top surface facing portion 50, the back surface facing portion 51, and the bottom surface facing portion 52 as shown in FIGS. And even if there is no bottom facing part 52, the air flow in the test chamber 8 does not change greatly.

19 to 22 show a test apparatus 231 that employs a partition member 230 that does not have the top surface facing portion 50 and the bottom surface facing portion 52 as a modification of the present invention.
Since the test apparatus 231 is different only in the structure of the partition member 230, the same reference numerals are assigned to the same members as those of the previous embodiment, and detailed description thereof is omitted.
Also in the test apparatus 231, the rod insertion through holes 20 and 21 are downstream in the air flow direction with respect to the test chamber 8. Therefore, the nitrogen gas that has entered the heat insulating region 17 from the heat insulating region side opening 18 of the rod insertion through holes 20 and 21 does not flow into the test chamber 8 side. At least, it does not flow into the DUT installation area 115 in the test chamber 8. Therefore, the nitrogen gas that has entered the heat insulation region 17 from the heat insulation region side opening 18 of the rod insertion through holes 20 and 21 does not affect the environment of the test chamber 8, particularly the DUT installation region 115.

In the above-described embodiment, the lower-side covering member 201 is a cylinder that does not have elasticity. However, a bellows or other elastic member may be used as the lower-side covering member 201. All of the above-described structures can be adopted as the lower-side covering member 201. A structure having a slack as shown in FIG. 12, a structure using elasticity as shown in FIG. 13, and an end as shown in FIGS. An open structure may be used.
As for the introduction position of nitrogen gas and dry air, the piping 28 is connected to a covering member or the like as shown in FIG. 16 to introduce the nitrogen gas or dry gas directly into the space, or the heat insulating region side as shown in FIG. A structure may be employed in which nitrogen gas or dry gas is introduced from the opening 18 side.
A magnet may be used for attaching the lower side covering member 201.
In the above-described embodiment, the magnets 205 are provided at both ends of the upper cover member 200, and the upper cover member 200 is attached to the top surface of the thermostatic device body 5 and the lower surface of the elevating bar (drive unit) 75 with the magnet 205. One or both may be attached by known joining means such as screws.

The external force imparting device 3 exemplified in the above-described embodiment is configured to pull the sample (test object) by inserting the upper rod 76 from the upper part of the thermostatic device body 5 and pulling up the upper rod 76. Is not limited to this configuration. For example, the lower rod 78 may be pulled down to pull the sample (test object). That is, the moving rod may be on the top or bottom. Of course, the upper rod 76 and the lower rod 78 may move together.
Further, a rod or the like may be arranged in the horizontal direction and apply a force in the lateral direction to the sample (test object).
Moreover, the external force imparting device 3 is not limited to a device that performs a tensile test, and may be a device that performs a compression test, a hardness test, or the like. When a compression test or a hardness test is performed, the rod or the like of the external force imparting device 3 presses the sample (test object).

DESCRIPTION OF SYMBOLS 1 Test apparatus 2 Constant temperature apparatus 3 External force provision apparatus 5 Constant temperature apparatus main body 6 Air conditioner part 7 Main body side housing part 8 Test chamber 10 Thermal insulation wall 17 Thermal insulation area 18 Thermal insulation area side opening 20, 21 Rod insertion through hole 22 Air discharge side Through hole 23 Air suction side through hole 26 External side opening 27 Subchamber region 28 Piping (gas supply part)
55 Flow path forming part 72 Base part 73 Portal frame 75 Lifting bar (driving part)
76 Upper rod 77 Upper gripping tool (action part)
78 Lower rod 79 Lower grip (action part)
88 Constant temperature apparatus 115 DUT installation area 200 Upper cover member 201 Lower cover member 205 Magnet 210, 215 Space 220, 221, 222, 223 Upper cover member 231 Test apparatus

Claims (8)

It has a constant temperature device and an external force applying device that applies external force to the DUT,
The thermostatic device includes a heat insulating region surrounded by a heat insulating wall, a test chamber that is a part or all of the heat insulating region and capable of forming a predetermined environment, and a penetration that communicates the inside of the heat insulating region and the outside of the thermostatic device. Have holes,
The external force imparting device has an action part in contact with the object to be tested and a drive part for operating the action part, the action part of the external force imparting apparatus is in the test chamber, and the drive part is outside the heat insulating region. In the test apparatus in which a part of the through-hole penetrates the through-hole and the drive part and the action part are connected,
There is a space outside the through hole and extending the through hole in the axial direction, and has a cover member that covers the periphery of the space, and a part of the external force applying device is covered with the cover member,
A test apparatus having a gas supply means and capable of supplying a gas having a dew point lower than that of outside air or air in a test chamber into the space covered with the covering member by the gas supply means. . The external force imparting device has a rod that connects the action portion and the drive portion, and the rod moves in the axial direction.
The test apparatus according to claim 1, wherein the covering member has elasticity in the axial direction of the through hole, and a part of the covering member is attached to the external force applying apparatus side and expands and contracts according to the movement of the rod.   The test apparatus according to claim 1 or 2, wherein a part of the covering member is attached to the external force applying apparatus side by a magnet.   The gas supply means supplies gas from the inner peripheral side of the through hole or the heat insulating region side of the thermostatic device, and the gas reaches the space covered by the covering member via the through hole. Item 4. The test apparatus according to any one of Items 1 to 3.   In the through-hole, there is a sub-chamber region having a cross-sectional area in a direction perpendicular to the axis of the through-hole larger than the others, and the low dew point gas is supplied to the sub-chamber region. Item 5. The test apparatus according to any one of Items 1 to 4. The thermostatic device has an air conditioner unit, circulates air between the test chamber and the air conditioner unit, and maintains the test chamber in a desired environment.
6. The heat insulating region side of the through hole is open in a region that is on the downstream side in the air flow direction with respect to the DUT installation region in which the DUT is installed. The test apparatus according to the above. A through-hole having a heat-insulating region surrounded by a heat-insulating wall and a test chamber that is a part or all of the heat-insulating region and capable of forming a predetermined environment, and communicates the inside and outside of the heat-insulating region with the heat-insulating wall. In a thermostat having
There is a space outside the through hole at a position where the through hole is extended in the axial direction, and has a covering member that covers the periphery of the space,
A thermostatic device comprising a gas supply means and capable of supplying a gas having a dew point lower than that of outside air or air in a test chamber into the space covered with the covering member by the gas supply means. .   The cover member is stretchable in the axial direction of the through hole, has a fixing means for fixing a part of the cover member to another member, and the cover member expands and contracts according to the movement of the other member. Item 8. The thermostatic device according to Item 7.

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