JP7105206B2 - Air conditioning air supply device and material testing machine - Google Patents

Description

The present invention relates to a conditioned air supply device and a material testing machine.

Conventionally, as described in Patent Document 1, there has been known an conditioned air supply device that generates conditioned air adjusted to a predetermined temperature and humidity in an air conditioning unit and supplies the conditioned air through a duct to an conditioned air utilization room. ing. This conditioned air supply device is used to apply target environmental conditions (temperature and humidity) to an object in, for example, a temperature test, a temperature/humidity test, or the like.

The precision conditioned air supply device described in Patent Document 1 includes an air conditioning unit that supplies air whose temperature and humidity are adjusted, and an air supply intake unit that is attached to the air conditioning unit and provided with an air supply port and an air intake port. and two ducts respectively connected to the air supply port and the air intake port. In this conditioned air supply device, the conditioned air whose temperature and humidity have been adjusted in the air conditioning unit is sent to the conditioned air utilization room through the air supply side duct, and the conditioned air is recovered from the conditioned air utilization room through the intake side duct.

JP-A-9-269144

Prior to air-conditioning the conditioned air utilization room as described above, it is first necessary to connect a duct to the conditioned air utilization room. Here, in the conditioned air supply device described in Patent Document 1, since the air supply side duct and the intake side duct have independent structures, there is a problem that the above duct connection work takes a long time.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to provide an conditioned air supply device and a material testing machine equipped with the same that can further reduce the time required for duct connection work. is.

A conditioned air supply apparatus according to one aspect of the present invention is an conditioned air supply apparatus that supplies temperature-controlled conditioned air to a first temperature-controlled space, comprising: an air conditioning unit that adjusts the temperature of the conditioned air; A first temperature-controlled room defining a temperature-controlled space; the duct provided with a recovery path for conditioned air from the temperature controlled space to the air conditioning unit; and a positioning portion for positioning the first temperature controlled chamber at a predetermined position relative to the temperature controlled object. I have it. The first temperature-controlled chamber has a side portion extending in the longitudinal direction of the duct from a tip portion opposite to a base end portion of the duct connected to the air conditioning unit, and a side portion extending in the length direction of the duct. It is formed in a tubular shape with opposite bottoms. In the side portion of the first temperature-controlled chamber, the first temperature-controlled space is open to the outer space of the first temperature-controlled chamber, and between the tip portion and the bottom portion in the length direction. At least an opening cut out in the circumferential direction over the upper portion, the side portion and the lower portion of the first temperature controlled chamber , wherein at least the object to be temperature controlled and a holding portion for holding the object to be temperature controlled The opening having a size allowing one to be inserted is formed.
Further, an conditioned air supply device according to one aspect of the present invention is an conditioned air supply device that supplies temperature-controlled conditioned air to a first temperature-controlled space, comprising: an air conditioning unit that adjusts the temperature of the conditioned air; a first temperature-controlled space defining the first temperature-controlled space; the duct provided with a recovery path for conditioned air from the first temperature-controlled space to the air-conditioning unit; and a positioning unit for positioning the first temperature-controlled room at a predetermined position with respect to the temperature-controlled object. , is equipped with The first temperature-controlled chamber has a side portion extending in the longitudinal direction of the duct from a tip portion opposite to a base end portion of the duct connected to the air conditioning unit, and a side portion extending in the length direction of the duct. It is formed in a tubular shape with opposite bottoms. The side portion of the first temperature-controlled chamber is provided with an opening for opening the first temperature-controlled space to an outer space of the first temperature-controlled chamber. The opening is formed to have a size capable of inserting at least one of the holding portions for holding the preparation. The conditioned air flowing from the bottom portion in the first temperature-controlled space toward the recovery port of the recovery passage is more conditioned than the conditioned air flowing from the supply port of the supply passage toward the bottom portion in the first temperature-controlled space. An air guide section for guiding the conditioned air is arranged in the first temperature controlled space so that the conditioned air flows near the open port, or the supply port extends from the supply port toward the bottom in the first temperature controlled space. the supply in a direction perpendicular to the direction of flow of the conditioned air so that the conditioned air flowing in the first temperature controlled space flows closer to the open port than the conditioned air flowing from the bottom portion in the first temperature controlled space toward the recovery port. A port is located closer to the open port than the recovery port.

Since this conditioned air supply device includes a duct provided with a supply path and a recovery path for conditioned air, it differs from a conventional conditioned air supply device having a structure in which the supply duct and the recovery duct are independent. , ducts can be collectively connected to the first temperature-controlled chamber. Therefore, the work of connecting the duct to the first temperature controlled room can be simplified, and the work of connecting the duct can be completed in a shorter time. In addition, the duct provided with both the supply channel and the recovery channel is heavy, and it is difficult to stabilize the position of the first temperature-controlled room connected to the duct. , a positioning portion for positioning the first temperature controlled chamber. Thereby, the first temperature-controlled chamber is positioned at a predetermined position with respect to the temperature-controlled object, and the conditioned air supplied from the air-conditioning unit through the supply path of the duct is more reliably supplied to the temperature-controlled object. It becomes possible. In addition, the object to be temperature controlled can be easily set in the space to be temperature controlled, and the position of the object to be temperature controlled after setting can be easily adjusted.

In the conditioned air supply device described above, the positioning portion may directly or indirectly support the duct.

According to this configuration, by positioning the first temperature controlled chamber and supporting the duct by the positioning portion, the heavy duct can be easily held in a desired posture and position.

In the conditioned air supply device described above, the positioning portion may directly support a base end portion side of the duct connected to the air conditioning unit.

According to this configuration, the base end portion of the duct, which is particularly important for maintaining the posture and position of the duct, can be directly supported by the positioning portion.

In the conditioned air supply device described above, the positioning portion may indirectly support the duct connected to the first temperature-controlled chamber by supporting the first temperature-controlled chamber. .

According to this configuration, even if it is difficult to dispose the positioning part so as to directly support the duct, the posture and position of the duct can be changed by indirectly supporting the duct through the first temperature controlled chamber. It can be held.

In the conditioned air supply device described above, the first temperature-controlled chamber may be detachable from the duct.

According to this configuration, the first temperature-controlled chamber can be appropriately replaced with the duct according to various situations, such as when the inside of the first temperature-controlled chamber is contaminated.

The conditioned air supply device may further include a second temperature controlled chamber defining a second temperature controlled space. The first temperature controlled chamber and the second temperature controlled chamber may be selectively attachable to the duct.

According to this configuration, it is possible to appropriately replace different temperature-controlled chambers with respect to the duct according to, for example, the size and shape of the temperature-controlled object.

In the above-described conditioned air supply device, the conditioned air flowing from the first temperature-controlled space toward the recovery port of the recovery path is higher than the conditioned air flowing from the supply port of the supply path toward the first temperature-controlled space. An air guide section for guiding the conditioned air to flow near the open port is disposed in the first temperature controlled room, or the conditioned air flowing from the supply port toward the first temperature controlled space is The supply port is more open than the recovery port in a direction perpendicular to the flow direction of the conditioned air so that the conditioned air flowing from the first temperature-controlled space toward the recovery port flows closer to the opening than the conditioned air flows toward the recovery port. It may be located near the mouth.

According to this configuration, the flow of conditioned air can suppress the outside air from flowing into the first temperature-controlled space through the opening, so that the temperature in the first temperature-controlled space can be controlled more reliably. becomes possible.

In the above-described conditioned air supply device, the first temperature-controlled chamber may constitute one bottomed tube member together with the duct.

According to this configuration, the conditioned air supply path and the conditioned air recovery path can be provided and the first temperature-controlled space can be provided in the interior of one pipe member. Easy.

A material testing machine according to another aspect of the present invention includes a testing machine main body that holds a test piece as the temperature-controlled object in a test space as the first temperature-controlled space, and temperature-controlled conditioned air. and a conditioned air supply device according to one aspect of the present invention for supplying the test space.

Since this material testing machine includes the conditioned air supply device according to one aspect of the present invention, it is possible to quickly connect the duct to the test chamber defining the test space in preparation for the test. is. In addition, by positioning the test chamber at a predetermined position with respect to the test piece, the conditioned air temperature-controlled by the air conditioning unit can be more reliably supplied to the test piece.

As is clear from the above description, according to the present invention, it is possible to provide a conditioned air supply device capable of further shortening the time required for duct connection work and a material testing machine equipped with the same.

BRIEF DESCRIPTION OF THE DRAWINGS It is a front view which shows typically the structure of the material testing machine which concerns on Embodiment 1 of this invention, and a conditioned air supply apparatus. Fig. 2 is a cross-sectional view schematically showing the internal structure of the conditioned air supply device; It is a top view which shows typically the structure of the said material testing machine and air-conditioning air supply apparatus. Fig. 2 is a right side view schematically showing the configuration of the conditioned air supply device; Fig. 2 is a rear view schematically showing the configuration of the conditioned air supply device; FIG. 4 is a schematic diagram showing a configuration of a connecting portion between a duct and a test chamber in the conditioned air supply device; FIG. 4 is a cross-sectional view showing the internal structure of the duct; FIG. 3 is a front view schematically showing the configuration of a material testing machine and an air-conditioned air supply device according to Embodiment 2 of the present invention; FIG. 7 is a plan view schematically showing the configuration of a material testing machine and an air-conditioning air supply device according to Embodiment 2 of the present invention; Fig. 10 is a right side view schematically showing the configuration of the material testing machine and the conditioned air supply device according to Embodiment 2 of the present invention; FIG. 10 is a schematic diagram showing the configuration of a connecting portion between a duct and a test chamber in the conditioned air supply apparatus according to Embodiment 2 of the present invention; It is a schematic diagram for describing other embodiments of the present invention. It is a schematic diagram for describing other embodiments of the present invention. It is a schematic diagram for describing other embodiments of the present invention. It is a schematic diagram for describing other embodiments of the present invention.

A conditioned air supply device and a material testing machine according to embodiments of the present invention will be described in detail below with reference to the drawings.

(Embodiment 1)
<Material testing machine, conditioned air supply device>
First, configurations of a conditioned air supply device 2 and a material testing machine 1 according to Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 7. FIG. 1 to 7 show only main components of the conditioned air supply device 2 and the material testing machine 1 according to the present embodiment, and the conditioned air supply device 2 and the material testing machine 1 are shown in these figures. Other components not appearing in the figure may also be provided.

The material testing machine 1 is used for material testing for evaluating material properties of test pieces made of various materials such as metal, plastic, and rubber. Types of material tests include, for example, tensile tests, compression tests, bending tests, impact tests, and the like. Material properties to be evaluated include, for example, various mechanical properties (material strength, elasticity, hardness, etc.), thermal properties (linear expansion coefficient, etc.), and electrical properties (electric resistance, etc.). . In this embodiment, a case where the mechanical properties of a test piece are evaluated by a tensile test will be described as an example.

As shown in FIG. 1, a material testing machine 1 (tensile testing machine) includes a testing machine main body 3 that holds a test piece (temperature-controlled object) in a test space (first temperature-controlled space), and a testing machine main body 3 and a conditioned air supply device 2 for supplying temperature-controlled conditioned air to the test space. Each of these components will be described in detail below.

The tester main body 3 is a device that holds a test piece and applies a predetermined test force (tensile force in this embodiment) to the test piece. As shown in FIG. 1, the testing machine main body 3 includes a base portion 31, a portal frame 32, a crosshead 33, an upper chuck 34, an upper rod 34A, a lower chuck 35, and a lower rod 35A. and mainly have

The base part 31 is placed on the tester stand 4 . The portal frame 32 is configured in a frame shape rising upward from the base portion 31 . The crosshead 33 can move up and down along a guide rail (not shown) provided on the frame inner surface 32A of the portal frame 32 by driving a motor or hydraulic pressure.

The upper chuck 34 holds (nips) the upper portion of the test piece, and is connected to the crosshead 33 via an upper rod 34A. The lower chuck 35 holds (nips) the lower portion of the test piece, and is connected to the base portion 31 via a lower rod 35A. By moving the crosshead 33 upward while the test piece is held by the upper chuck 34 and the lower chuck 35, an upward tensile force is applied to the test piece.

The testing machine stand 4 has a top plate 41 arranged in a horizontal state, and a plurality of support legs 42 supporting the top plate 41 from below at a predetermined height position. As shown in the plan view of FIG. 3, the top plate 41 is a table plate having a rectangular shape in a plan view that is long in the left-right direction, and the tester main body 3 is placed on an upper surface 41A thereof. Further, as shown in FIG. 1, each support leg 42 extends downward from a corner of the top plate 41 and is placed on the floor surface F1. Note that the testing machine stand 4 is not an essential component in the material testing machine of the present invention, and may be omitted.

The conditioned air supply device 2 is a device that supplies temperature-controlled conditioned air A1 to the test space S0 (first temperature-controlled space, FIG. 6). As shown in FIGS. 1 to 7, the conditioned air supply device 2 includes an air conditioning unit 10, a duct 20 connected to the air conditioning unit 10, and a test room 70 (first temperature controlled room) defining a test space S0. , and a positioning portion 80 for positioning the test chamber 70 .

The air conditioning unit 10 adjusts the temperature of air-conditioned air, and is a small unit with a reduced installation area. As shown in FIG. 1, the air conditioning unit 10 includes, for example, a unit housing 16 having a rectangular parallelepiped box shape, a U-shaped moving handle 14 attached to the front side surface of the unit housing 16, and a unit housing 16. and a caster 12 and a foot brake 11 provided on the lower surface of the. An instrumentation unit 15 such as a tablet PC for operating the operation of the air conditioning unit 10 is rotatably attached to the upper portion of the moving handle 14 . Note that the shape of the unit housing 16 is not limited to a rectangular parallelepiped shape, and any shape can be adopted. Also, the moving handle 14, the casters 12 and the foot brake 11 are not essential components of the conditioned air supply device of the present invention and may be omitted.

FIG. 2 is a cross-sectional view showing the internal structure of the air conditioning unit 10. As shown in FIG. As shown in FIG. 2, the air conditioning unit 10 further includes a partition cylinder 17, a cooler 18, a heater 19, and a propeller fan 53 as components arranged within the unit housing 16. there is

The unit housing 16 is made of a heat-insulating wall, and is provided therein with an air-conditioned space R0 through which the air-conditioned air A1 flows. An insertion hole into which the base end of the duct 20 is inserted is formed in the unit housing 16 so as to penetrate through the central portion of the upper wall. A cylindrical duct holding guide 54 into which the base end of the duct 20 is inserted protrudes from the upper surface of the unit housing 16 . As shown in FIG. 2, the proximal end of the duct 20 is held in a vertically extending posture by being inserted into the tubular hole of the duct holding guide 54 .

The partition tube 17 is arranged substantially in the center of the unit housing 16 in the vertical direction and the horizontal direction. and an extending tubular upper portion 17B. As shown in FIG. 2, the air-conditioned space R0 includes an intake-side space R1 defined by the outer surface of the partition tube 17 and the inner surface of the unit housing 16, and a space inside the partition tube 17 defined by the intake-side space R1. and an enclosed insufflation-side space R2.

The cooler 18 is, for example, an evaporator of a refrigerator that performs a vapor compression refrigeration cycle, and cools the conditioned air A1 through heat exchange with the refrigerant. As shown in FIG. 2, the cooler 18 is arranged in the intake-side space R1 and has a ring shape surrounding the partition tube 17 (upper portion of the tube main body 17A).

The heater 19 is composed of, for example, a heater, and heats the conditioned air A1. The heater 19 has an annular shape and is arranged on the leeward side of the cooler 18 in the intake-side space R1. More specifically, the heater 19 is arranged adjacent to the bottom surface 16A of the unit housing 16 so as to face the bottom hole 17C formed in the bottom portion of the partition tube 17 .

The propeller fan 53 generates a flow of conditioned air A1 from the inlet IL to the outlet OL in the conditioned space R0. As shown in FIG. 2, a fan motor 51 is arranged in the center of the lower surface of the unit housing 16, and a rotating shaft 52 extending upward from the fan motor 51 through the lower wall of the unit housing 16 is attached to the tip of the rotating shaft 52. , a propeller fan 53 is attached. The propeller fan 53 is arranged below inside the partition tube 17 and is located on the leeward side of the heater 19 . The space on the windward side of the propeller fan 53 is the intake space R1, and the space on the leeward side of the propeller fan 53 is the air supply space R2.

When the fan motor 51 is driven, the propeller fan 53 rotates around the rotation shaft 52 to generate a flow of conditioned air A1 in the conditioned space R0. Specifically, the conditioned air A1 sucked from the inlet IL flows downward through the cooler 18 in the intake-side space R1, collides with the bottom surface 16A, and then joins the center of the bottom surface 16A. After passing through the heater 19, the conditioned air A1 is pressurized by the propeller fan 53 and sent to the air supply side space R2. After that, the conditioned air A1 flows upward toward the outlet OL in the air supply side space R2.

As shown in the plan view of FIG. 3 and the right side view of FIG. 4, the unit housing 16 includes a front air-conditioned room 16B in which an air-conditioned space R0 (FIG. 2) is provided, and a refrigerator compressor (shown in the figure). ), and a rear machine room 16C in which electrical components and the like are arranged. Further, as shown in the rear view of FIG. 5, the intake port 10B of the machine room 16C is provided on the rear lower side of the unit housing 16, and as shown in FIG. An exhaust port 10A for the machine room 16C is provided.

The duct 20 is provided with a supply path 21A for the conditioned air A1 from the air conditioning unit 10 to the test space S0 (FIG. 6) and a recovery path 22A for the conditioned air A1 from the test space S0 to the air conditioning unit 10. FIG. FIG. 2 shows the structure of the base end portion of the duct 20 (the portion of the duct 20 connected to the air conditioning unit 10). On the other hand, FIG. 6 shows the structure of the distal end portion of the duct 20 (the end portion of the duct 20 opposite to the proximal end portion in the longitudinal direction and to which the test chamber 70 is connected). The duct 20 extends from the proximal end to the distal end and has a predetermined duct length.

As shown in FIGS. 2 and 6, the duct 20 is a multiple pipe (double duct) in which a supply-side duct member 21 forming a supply channel 21A and a recovery-side duct member 22 forming a recovery channel 22A are coaxially arranged. tube) structure. Specifically, both the supply-side duct member 21 and the recovery-side duct member 22 have a hollow cylindrical shape. A member 21 is accommodated within the recovery side duct member 22 .

The space surrounded by the inner peripheral surface of the supply-side duct member 21 is the supply path 21A, and the space between the inner peripheral surface of the recovery-side duct member 22 and the outer peripheral surface of the supply-side duct member 21 is the recovery path 22A. . The duct 20 further has a heat insulating material 23 covering the outer peripheral surface of the recovery side duct member 22 . The heat insulating material 23 is preferably made of a material having moderate flexibility. Since the supply-side duct member 21 is covered with the recovery-side duct member 22, the recovered air acts as a heat insulator, so that the influence of the duct ambient temperature on the conditioned air A1 flowing through the supply-side duct member 21 is suppressed.

First, the structure of the proximal end portion of the duct 20, that is, the structure of the connecting portion between the duct 20 and the air conditioning unit 10 will be described with reference to FIG. As shown in FIG. 2, the supply-side duct member 21 is inserted into the unit housing 16 through the cylindrical hole of the duct holding guide 54 and the insertion hole penetrating the upper wall of the unit housing 16. The base end portion 21B is attached to the top surface of the partition tube 17 by a supply-side duct fixture 60. As shown in FIG. In this state, the proximal opening of the supply-side duct member 21 communicates with the outlet OL.

The supply-side duct fixture 60 attaches the supply-side duct member 21 to the partition cylinder 17 while allowing rotation of the supply-side duct member 21 about its axis. , a packing 63 and a pressing plate 64 . The supply-side duct flange 61 is attached to the base end portion 21B of the supply-side duct member 21 by adhesion or the like. The packing 63 is an annular member into which the base end portion 21B is inserted. As shown in FIG. 2 , the lower surface of the packing 63 is flush with the base end surface of the supply side duct member 21 .

The sliding plate 62 is an annular member into which the base end portion 21B is inserted, and is attached to the non-joint surface (the surface opposite to the joint surface) of the supply-side duct flange 61 . The pressing plate 64 presses the supply side duct flange 61 downward with the sliding plate 62 interposed therebetween, and is fixed to the top surface of the partition tube 17 with fasteners (not shown) such as screws. In this configuration, the slide plate 62 and the pressing plate 64 slide in the circumferential direction, and the packing 63 and the top surface of the partition tube 17 slide in the circumferential direction, thereby causing the supply-side duct member 21 to move around the axis. rotation is allowed.

On the other hand, the collection-side duct member 22 is inserted into the cylindrical hole of the duct holding guide 54 and the insertion hole that penetrates the upper wall of the unit housing 16, and the base end side end face is the inner tank top surface 16E of the unit housing 16. It is attached to the central portion of the upper wall of the unit housing 16 by means of a recovery-side duct fixture 69 so as to be flush with the unit housing 16 . In this state, the proximal opening of the recovery-side duct member 22 communicates with the inlet IL.

The recovery-side duct fixture 69 attaches the recovery-side duct member 22 to the unit housing 16 while allowing the recovery-side duct member 22 to rotate about its axis. , a packing 68 , and a pressing plate 67 . The recovery-side duct flange 65 is attached to the base end portion 22B of the recovery-side duct member 22 by adhesion or the like. The packing 68 is an annular member into which the base end portion 22B is inserted. The upper surface of the packing 68 is attached to the joint surface of the recovery side duct flange 65, and the lower surface thereof is placed on the inner tank top surface 16E.

The sliding plate 66 is an annular member into which the base end portion 22B is inserted, and is attached to the non-joint surface (the surface opposite to the joint surface) of the recovery-side duct flange 65 . The presser plate 67 presses the recovery side duct flange 65 downward with the slide plate 66 interposed therebetween, and is fixed to the inner tank top surface 16E by fasteners (not shown) such as screws. In this configuration, the slide plate 66 and the pressing plate 67 slide in the circumferential direction, and the packing 68 and the inner tank top surface 16E slide in the circumferential direction. Rotation is allowed.

The duct 20 is bent above the duct holding guide 54 (Fig. 2) and has an arm portion 20A extending radially outward from the duct holding guide 54 (Fig. 3). As described above, since the duct 20 is rotatable around its axis, the arm portion 20A can be turned around the base end portion as indicated by the double arrow in FIG.

As a result, the layout of the conditioned air supply device 2 and the testing machine main body 3 can be arranged with a high degree of freedom. For example, the conditioned air supply device 2 is not limited to being arranged on the left side of the tester main body 3 as shown in FIG. Also, handling and fixing of the duct 20 are facilitated. However, the duct 20 may not rotate with respect to the air conditioning unit 10 .

Also, the duct 20 in this embodiment is detachable from the air conditioning unit 10 so as to be replaceable. Specifically, the supply side duct member 21 and the recovery side duct member 22 can be removed from the air conditioning unit 10 by removing the holding plates 64 and 67 (FIG. 2). However, the duct 20 is not limited to being detachable from the air conditioning unit 10, and may be of a fixed type.

Next, the structure of the tip portion of the duct 20 will be described with reference to FIG. Both the supply port 21AA of the supply path 21A (the tip side opening of the supply side duct member 21) and the recovery port 22AA of the recovery path 22A (the tip side opening of the recovery side duct member 22) are open to the test space S0. Further, as shown in FIG. 6, the tip of the supply-side duct member 21 protrudes further toward the test space S0 than the tip-side end surface of the recovery-side duct member 22. As shown in FIG. This can prevent the conditioned air A1 blown out from the supply port 21AA from being directly sucked into the recovery port 22AA. However, the tip side end face of the supply side duct member 21 may be flush with the tip side end face of the recovery side duct member 22, or may be further away from the test space S0 than the tip side end face of the recovery side duct member 22. good too.

FIG. 7 shows a cross section of the duct 20 taken perpendicularly to its length. As shown in FIG. 7, the duct 20 has a plurality of (four in this embodiment) duct partition walls 24 extending radially from the outer peripheral surface of the supply-side duct member 21 toward the inner peripheral surface of the recovery-side duct member 22 . is doing. The duct partition wall 24 is a member for maintaining a constant radial distance between the supply-side duct member 21 and the recovery-side duct member 22, that is, the size of the recovery path 22A. are arranged (at equal intervals in this embodiment). Accordingly, even when stress is applied to the duct 20 or when the duct 20 is bent, the clogging of the recovery path 22A can be suppressed. However, the duct partition wall 24 is not an essential component in the conditioned air supply device of the present invention and may be omitted.

The test chamber 70 (first temperature-controlled room) defines the test space S0 (first temperature-controlled space), and the duct 20 is arranged so that the test space S0 communicates with the supply channel 21A and the recovery channel 22A. Connected to tip. More specifically, as shown in FIG. 6, the test chamber 70 is a tubular member having approximately the same diameter as the duct 20, and extends from the tip of the duct 20 in the longitudinal direction of the duct 20. It is formed in a tubular shape having a curved bottom portion 73 facing the tip of the duct 20 in the direction. The test chamber 70 and the duct 20 form a single bottomed tube member by joining the end surface of the test chamber 70 against the tip surface of the duct 20 . Note that the tube diameter of the test chamber 70 is not limited to being the same as the diameter of the duct 20 , and may be larger than the diameter of the duct 20 or smaller than the diameter of the duct 20 .

As shown in FIGS. 3 and 4, the test chamber 70 has a portion that opens the test space S0 to the outer space of the test chamber 70 and has a size that allows the test piece to be inserted. An opening 70A is formed by notching in the circumferential direction over the upper portion, the side portion, and the lower portion. By adjusting the position of the duct 20 so as to bring the opening 70A closer to the test piece held by the upper chuck 34 and the lower chuck 35, the test piece 100 can be easily moved into the test space S0 as shown in FIG. can be set to The opening 70A may have a size that allows insertion of not only the test piece 100 but also the upper chuck 34 and the lower chuck 35 (holding portions). Also, the opening 70A may not be formed.

As shown in FIG. 3, the test chamber 70 is provided with a pivotable cover 71 for opening and closing the opening 70A. As indicated by a two-dot chain line in the figure, the cover 71 is attached so as to be rotatable around the edge of the opening 70A (the edge on the bottom 73 side). Note that this cover 71 can also be omitted.

The test chamber 70 is detachable from the tip of the duct 20 . Specifically, the tip of the duct 20 and the opening-side end of the test chamber 70 (the end opposite to the bottom 73) are detachable from each other by means of fasteners such as connecting rings and screws. However, the duct 20 and the test chamber 70 are not limited to being detachable, and they may be joined together by adhesion or the like.

As shown in FIG. 6, in the test chamber 70, conditioned air A1 (return air) flowing from the test space S0 toward the recovery port 22AA is conditioned air A1 (forward air) flowing from the supply port 21AA toward the test space S0. A wind guide portion 72 that guides the conditioned air A1 is arranged so that it flows closer to the opening 70A than the air. The air guide section 72 is an annular member through which the conditioned air A1 can pass, and is arranged in the test chamber 70 on the leeward side of the test space S0.

The air guide portion 72 is formed in a shape that decreases in diameter toward the bottom portion 73, and a gap is formed between the tip surface 72A and the bottom portion 73 through which the conditioned air A1 can pass. is arranged so that a gap through which the conditioned air A1 can pass is formed between the inner peripheral surface of the

By arranging the air guide section 72, the conditioned air A1 flows in the test chamber 70 as follows. That is, the conditioned air A1 blown out from the supply port 21AA passes through the center portion in the radial direction of the test space S0, then passes through the center hole of the air guide portion 72 and collides with the bottom portion 73. As shown in FIG. Then, the conditioned air A1 reverses its flow direction, passes outside the outer peripheral surface 72B of the air guide section 72, and then flows along the inner peripheral surface of the test chamber 70 toward the recovery port 22AA.

As a result, a flow of the conditioned air A1 is formed along the opening 70A, and the inflow of outside air from the opening 70A into the test space S0 is suppressed. If the effect of suppressing the inflow of external air is insufficient, it is preferable to close the opening 70A with the cover 71. On the other hand, if the effect is sufficiently obtained, the cover 71 may be opened. The air guide section 72 is also not an essential component in the conditioned air supply device of the present invention, and may be omitted.

The positioning part 80 ( FIG. 1 ) positions the test chamber 70 at a predetermined position with respect to the test strip 100 , specifically at a position between the upper chuck 34 and the lower chuck 35 . The positioning part 80 in this embodiment directly supports the base end side of the duct 20 and is attached to the air conditioning unit 10 . Specifically, as shown in FIG. 1 , the positioning portion 80 in this embodiment is configured by a duct holding arm that extends in the length direction of the duct 20 and supports the lower portion of the duct 20 . That is, the positioning section 80 positions the test chamber 70 connected to the duct 20 by supporting the duct 20 . Therefore, it is not necessary to prepare another jig or the like for holding the duct 20 . Further, the duct holding arm can rotate (rotate) together with the arm portion 20A of the duct 20. As shown in FIG. It should be noted that “the base end side of the duct 20” means a portion closer to the base end than the center of the duct 20 in the length direction.

This duct holding arm is configured to extend and contract in the length direction of the duct 20, and its length can be adjusted. However, the duct holding arm may not have the telescopic function.

<Material test method>
Next, a procedure of a material testing method performed using the material testing machine 1 will be described. In this embodiment, a tensile test in which a tensile force is applied to the test piece 100 to evaluate the mechanical properties of the test piece 100 will be described as an example.

First, a step of installing the test piece 100 in the tester main body 3 is performed. In this step, first, various materials such as metal, plastic, or rubber are processed into the shape of a tensile test piece determined by the test standard. The upper end of the test piece 100 is clamped by the upper chuck 34 and the lower end of the test piece 100 is clamped by the lower chuck 35 to fix the test piece 100 to the tester body 3 .

Next, the steps of preparing and installing the conditioned air supply device 2 are performed. In this step, first, the test chamber 70 is attached to the tip of the duct 20 . Then, the conditioned air supply device 2 is placed in the vicinity of the tester main body 3 (for example, to the left of the tester main body 3), and the position and attitude of the duct 20 are adjusted so that the test piece 100 is positioned within the test space S0. . Specifically, the duct 20 is routed so that the opening 70A can approach the test piece 100 fixed in advance from the side.

Next, the step of performing a tensile test on the specimen 100 is performed. In this step, a tensile force is applied to the test piece 100 and the mechanical properties of the test piece 100 at that time are measured. Specifically, the crosshead 33 (FIG. 1) is moved upward to pull the test piece 100 upward, increasing the tensile force until the test piece 100 breaks. Then, various mechanical properties such as tensile strength and yield point of the test piece 100 are evaluated based on the relationship between stress and strain obtained at that time.

During this time, the tensile test can be performed under desired temperature conditions by supplying air-conditioned air A1 temperature-controlled by the air-conditioning unit 10 through the duct 20 to the test space S0. Specifically, the temperature of the conditioned air A1 is adjusted by the cooler 18 or the heater 19 in the air conditioning unit 10, and the conditioned air A1 after the temperature adjustment is supplied to the test space S0 through the supply path 21A. The supplied conditioned air A1 is recovered from the recovery port 22AA and returned to the inlet IL of the air conditioning unit 10 through the recovery path 22A, thereby circulating the conditioned air A1 between the air conditioning unit 10 and the test space S0.

As described above, the conditioned air supply device 2 according to the present embodiment includes the duct 20 having a double-tube structure provided with the supply channel 21A and the recovery channel 22A for the conditioned air A1. Unlike conditioned air supply systems in which the ducts are independent structures, it is possible to connect the ducts 20 together to the test chamber 70 in preparation for material testing. Therefore, the work of connecting the duct 20 to the test chamber 70 can be simplified, and the work of connecting the duct 20 can be completed in a shorter time. Moreover, by surrounding the flow of the conditioned air A1 in the supply path 21A with the flow of the conditioned air A1 in the recovery path 22A, fluctuations in the temperature of the conditioned air A1 in the supply path 21A due to the outside air temperature can be prevented. Suppressible.

Moreover, the duct 20 having a double-tube structure is heavy, and it is difficult to stabilize the position of the test chamber 70 connected to the duct 20 . On the other hand, the conditioned air supply device 2 according to this embodiment includes a positioning portion 80 (duct holding arm) for positioning the test chamber 70 . As a result, the test chamber 70 is positioned at a predetermined position (a position between the upper chuck 34 and the lower chuck 35) with respect to the test piece 100, and the air-conditioned air supplied from the air-conditioning unit 10 through the supply path 21A of the duct 20 The air A1 can be supplied to the test piece 100 more reliably.

(Embodiment 2)
Next, a conditioned air supply device 2A and a material testing machine 1A having the same according to Embodiment 2 of the present invention will be described with reference to FIGS. 8 to 11. FIG. The conditioned air supply device 2A and the material testing machine 1A according to the second embodiment basically have the same configurations as the conditioned air supply device 2 and the material testing machine 1 according to the first embodiment, and have the same effects. However, it differs from the first embodiment in the configuration of the test chamber and the positioning section. Only points different from the first embodiment will be described below.

As shown in FIGS. 8 to 11, the conditioned air supply device 2A according to the second embodiment includes a test chamber 82 (first temperature controlled chamber) having, for example, a rectangular parallelepiped box shape. A test space S0 (first temperature-controlled space) having a size capable of accommodating the test piece 100, the upper chuck 34 and the lower chuck 35 is provided in the test chamber 82 (FIGS. 10 and 11). The upper rod 34A penetrates the upper wall of the test chamber 82, and the lower rod 35A penetrates the lower wall of the test chamber 82 (Fig. 11). The test chamber 82 is made of a transparent material (for example, transparent resin or the like) so that the state of the test piece 100 can be visually observed during the material test.

The test chamber 82 is detachable from the tip of the duct 20 as in the first embodiment. Specifically, as shown in FIG. 11, a cylindrical air supply/exhaust port 82A protrudes from the side surface of the test chamber 82, and the tip of the duct 20 is inserted into the air supply/exhaust port 82A. and the air supply/exhaust port 82A are detachable by means of an annular fixture 84 (coupler).

An annular wind direction control member 83 is attached to the tip of the supply-side duct member 21, the diameter of which increases with increasing distance from the tip. As a result, the conditioned air A1 can be reliably supplied to the test piece 100, and the conditioned air A1 blown out from the supply port 21AA is supplied to the collection port 22AA as a shortcut for the conditioned air A1, as in the first embodiment. It is possible to suppress direct inhalation. The wind direction control member 83 is made of, for example, transparent resin, but the material is not particularly limited. Also, the wind direction control member 83 may be omitted.

The conditioned air supply device 2A according to the present embodiment has the test chamber 82 at a predetermined position with respect to the test piece 100. Specifically, the test piece 100, the upper chuck 34 and the lower chuck 35 are accommodated in the test space S0. A positioning portion 81 is provided for positioning at a position where The positioning portion 81 is a holding stand on which the test chamber 82 is placed, and by supporting the test chamber 82 indirectly supports the duct 20 connected to the test chamber 82 .

Specifically, as shown in FIGS. 8 to 10, the positioning portion 81 includes a base portion 85 placed on the top plate 41 and a column portion 86 extending upward from the center portion of the base portion 85 in the left-right direction. and a rectangular plate-shaped support portion 87 extending horizontally rearward from the upper end of the column portion 86 . The test chamber 82 is placed on the rear upper surface of the support portion 87 .

Next, a procedure of a material testing method performed using the material testing machine 1A will be described. First, as shown in FIG. 8, the positioning portion 81 (holding stand) is attached to the top plate 41 of the tester stand 4 . At this time, the horizontal center positions of the holding stand and the testing machine main body 3 are aligned.

Next, the test chamber 82 is attached to the positioning portion 81 . Specifically, the test chamber 82 is placed on the rear upper surface of the support portion 87 so that the test piece 100, the upper chuck 34 and the lower chuck 35 are accommodated in the test space S0, and fixing tools such as knurled screws are attached. is used to fix the test chamber 82 against the support 87 . After that, the tip of the duct 20 is inserted into the air supply/exhaust port 82A of the test chamber 82, and both are fixed by the fixture 84. As shown in FIG.

Thereafter, as in the first embodiment, while supplying the conditioned air A1 temperature-controlled by the air conditioning unit 10 to the test space S0, by applying an upward tensile force to the test piece 100, the test piece 100 is kept under a predetermined temperature condition. A tensile test is performed at As shown in FIG. 11, after passing through the test piece 100, the conditioned air A1 blown out from the supply port 21AA collides with the inner surface of the test chamber 82 (the inner surface opposite to the air supply/exhaust port 82A), It flows on the inner surface of the test chamber 82 toward the recovery port 22AA. At this time, the conditioned air A1 passes through the outer surface side of the wind direction control member 83 and is sucked through the recovery port 22AA.

In Embodiment 2, the test chamber 82 can be positioned before the duct 20 is connected, so the alignment of the test chamber 82 with respect to the test piece 100 is easy. In addition, since the duct 20 can be indirectly supported by the positioning portion 81 (holding stand), there is no need to separately prepare a jig or the like for holding the duct 20 . However, in addition to the holding stand, the duct holding arm described in the first embodiment may be further provided.

(Other embodiments)
Other embodiments of the invention will now be described.

In Embodiments 1 and 2, the case where the conditioned air supply devices 2 and 2A are provided with only one type of test chamber 70 and 82 (first temperature controlled chamber) has been described, but as shown in FIG. Another type of test chamber 88 (second temperature-controlled space) defining a second temperature-controlled space may be further provided. And test chambers 70 and 88 may be selectively attachable to distal end 20B of duct 20 . As a result, the test chambers 70 and 88 can be appropriately replaced according to various conditions such as the shape and size of the test piece 100 . The test spaces S0 and S2 may have different volumes or may have the same volume. Also, three or more types of test chambers may be provided and these may be selectively attached to the duct 20 . Furthermore, not only the case of the tubular shape, but also multiple types of box-shaped test chambers described in the second embodiment may be provided, and these may be selectively attached to the duct 20 .

Instead of the circular ring-shaped air guide portion 72 shown in FIG. 6, as shown in FIG. 74 may be provided. In this case, the flow of the conditioned air A1 on the return side can be concentrated on the open port 70A side.

As shown in FIG. 14, the conditioned air A1 (outgoing air) flowing from the supply port 21AA toward the test space S0 is closer to the open port 70A than the conditioned air A1 (return air) flowing from the test space S0 toward the recovery port 22AA. The supply port 21AA may be positioned closer to the open port 70A than the recovery port 22AA in the pipe radial direction (the direction perpendicular to the flow direction of the conditioned air A1) so that the air flows near the . That is, the supply-side duct member 21 may be eccentric such that the central axis P1 of the supply-side duct member 21 is shifted toward the opening 70A with respect to the central axis P0 of the duct 20. FIG. Even in this case, it is possible to obtain the effect of suppressing the outside air from flowing into the test space S0 through the opening 70A.

The duct 20 is not limited to a double pipe structure, and as shown in FIG. 15, the duct 20 includes a tubular duct member 25 and a partition that divides the inside of the duct member 25 into a supply channel 21A and a recovery channel 22A. A plate 26 may be provided. Even in this case, the ducts 20 can be collectively connected to the test chamber 70 as in the case of adopting the double pipe structure, and the time required for connecting the ducts can be shortened.

In the first embodiment, the conditioned air supply device 2 used for the tensile test has an open opening 70A that is notched in the circumferential direction over the upper, side and lower portions of the test chamber 70. It is not limited to this. For example, when processing is performed by arranging a temperature controlled object in the first temperature controlled space without using upper and lower chucks, etc., the openings are provided at the upper, side and lower portions of the first temperature controlled chamber. It may be formed by notching any part of them.

In Embodiment 1, the case where the air conditioning unit 10 has only the temperature control function has been described, but it may further have a humidification function. In this case, a humidifier is arranged in the air-conditioned space R0, or steam can be introduced into the air-conditioned space R0 from a humidifier arranged outside the air-conditioning unit 10 .

In Embodiment 1, the case where both the cooler 18 and the heater 19 are provided as the temperature control unit that adjusts the temperature of the conditioned air A1 has been described, but one of the two may be omitted.

In the first and second embodiments, the case where the conditioned air supply devices 2 and 2A are used in the material test in which the test force is applied to the test piece 100 has been described. Devices 2, 2A may be used. Further, the application of the conditioned air supply devices 2 and 2A is not limited to temperature control of the test piece 100 during material testing. It is also possible to use it for temperature control of the test piece in the evaluation test etc.).

It should be understood that the embodiments disclosed this time are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the scope of the claims rather than the above description, and is intended to include all modifications within the scope and meaning equivalent to the scope of the claims.

Reference Signs List 1, 1A material testing machine 2, 2A conditioned air supply device 10 air conditioning unit 20 duct 21A supply path 21AA supply port 22A recovery path 22AA recovery port 34 upper chuck (holding portion)
35 lower chuck (holding part)
70, 82 Test room (1st temperature controlled room)
70A opening 72 air guide section 73 bottom section 80, 81 positioning section 88 test chamber (second temperature controlled chamber)
100 test piece (object to be temperature controlled)
A1 Conditioned air S0 Test space (first temperature controlled space)
S2 test space (second temperature controlled space)

Claims (10)

An conditioned air supply device for supplying temperature-controlled conditioned air to a first temperature-controlled space,
an air conditioning unit that adjusts the temperature of the conditioned air;
a first temperature-controlled room that defines the first temperature-controlled space;
A duct connected to the air conditioning unit, the duct having a supply path for conditioned air from the air conditioning unit to the first temperature-controlled space and a recovery path for conditioned air from the first temperature-controlled space to the air conditioning unit. the duct provided;
a positioning unit that positions the first temperature controlled chamber at a predetermined position with respect to the temperature controlled object;
The first temperature-controlled chamber has a side portion extending in the longitudinal direction of the duct from a tip portion opposite to a base end portion of the duct connected to the air conditioning unit, and a side portion extending in the length direction of the duct. formed in a tubular shape having opposing bottoms and
In the side portion of the first temperature-controlled chamber, the first temperature-controlled space is open to the outer space of the first temperature-controlled chamber, and between the tip portion and the bottom portion in the length direction. At least an opening cut out in the circumferential direction over the upper portion, the side portion and the lower portion of the first temperature controlled chamber , wherein at least the object to be temperature controlled and a holding portion for holding the object to be temperature controlled A conditioned air supply device, wherein the opening is formed to have a size that allows one to be inserted thereinto. An conditioned air supply device for supplying temperature-controlled conditioned air to a first temperature-controlled space,
an air conditioning unit that adjusts the temperature of the conditioned air;
a first temperature-controlled room that defines the first temperature-controlled space;
A duct connected to the air conditioning unit, the duct having a supply path for conditioned air from the air conditioning unit to the first temperature-controlled space and a recovery path for conditioned air from the first temperature-controlled space to the air conditioning unit. the duct provided;
a positioning unit that positions the first temperature controlled chamber at a predetermined position with respect to the temperature controlled object;
The first temperature-controlled chamber has a side portion extending in the longitudinal direction of the duct from a tip portion opposite to a base end portion of the duct connected to the air conditioning unit, and a side portion extending in the length direction of the duct. formed in a tubular shape having opposing bottoms and
The side portion of the first temperature-controlled chamber is provided with an opening for opening the first temperature-controlled space to an outer space of the first temperature-controlled chamber. The opening having a size that allows insertion of at least one of the holding portions for holding the preparation is formed,
The conditioned air flowing from the bottom portion in the first temperature-controlled space toward the recovery port of the recovery passage is more conditioned than the conditioned air flowing from the supply port of the supply passage toward the bottom portion in the first temperature-controlled space. An air guide section for guiding conditioned air is arranged in the first temperature controlled room so that the air flows near the opening, or
The conditioned air flowing from the supply port toward the bottom in the first temperature-controlled space is closer to the open port than the conditioned air flowing from the bottom in the first temperature-controlled space toward the recovery port. , wherein the supply port is positioned closer to the open port than the recovery port in a direction perpendicular to the flow direction of the conditioned air so that the conditioned air flows through. 3. The conditioned air supply device according to claim 1, wherein said positioning portion directly or indirectly supports said duct. 4. The conditioned air supply device according to claim 3 , wherein said positioning portion directly supports a base end side of said duct connected to said air conditioning unit. 4. The conditioned air supply device according to claim 3 , wherein the positioning portion indirectly supports the duct connected to the first temperature-controlled chamber by supporting the first temperature-controlled chamber. The conditioned air supply device according to any one of claims 1 to 5 , wherein the first temperature controlled chamber is detachable with respect to the duct. further comprising a second temperature-controlled room that defines the second temperature-controlled space;
7. The conditioned air supply device according to claim 6 , wherein said first temperature controlled chamber and said second temperature controlled chamber can be selectively attached to said duct. The conditioned air flowing from the first temperature controlled space toward the recovery port of the recovery path flows closer to the open port than the conditioned air flowing from the supply port of the supply channel toward the first temperature controlled space. an air guide section for guiding conditioned air is arranged in the first temperature controlled room, or
The conditioned air is adjusted so that the conditioned air flowing from the supply port toward the first temperature controlled space flows closer to the opening than the conditioned air flowing from the first temperature controlled space toward the recovery port. 2. The conditioned air supply system of claim 1 , wherein the supply port is located closer to the open port than the recovery port in a direction perpendicular to the direction of flow. The conditioned air supply device according to any one of claims 1 to 8 , wherein the first temperature controlled chamber and the duct form a bottomed tube member. a testing machine main body that holds the test piece as the temperature controlled object in the test space as the first temperature controlled space;
and the conditioned air supply device according to any one of claims 1 to 9 , which supplies temperature-controlled conditioned air to the test space.

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