JP4225885B2 - Tensile test equipment - Google Patents

Description

  The present invention relates to a tensile test apparatus, and more particularly to a tensile test apparatus including a test piece supply mechanism that automatically supplies a test piece to a tensile tester installed in a thermostatic bath.

  2. Description of the Related Art Conventionally, a tensile test apparatus in which a test piece is automatically supplied to a tensile tester provided in a thermostat is known. For example, in Patent Document 1, a plurality of test pieces are arranged at a constant pitch toward a tensile tester installed in a thermostat inside a thermostat equipped with an automatic window that can be automatically opened and closed at a test piece supply port. And an excluding device for removing the fractured test piece after the test by the tensile testing machine from the tensile testing machine, and a plurality of tests outside the automatic door provided in the thermostat. Extruding means for taking out the cassette from the cassette storage device in which the pieces are stored and taking out the test pieces from the taken-out cassette one by one, and a supply device for supplying the taken-out test pieces onto the conveying device of the thermostatic chamber are installed. A tensile testing apparatus is described. In the conventional tensile test apparatus, the cassette is taken out from the cassette housing apparatus installed in the vicinity of the thermostat, and the test pieces are taken out one by one from the cassette, and the automatic door is sequentially placed on the transfer apparatus installed in the thermostat. The test piece is automatically supplied from the test piece supply port, and the transfer device is used to transfer the test piece to the tensile tester while controlling the test piece for a certain period of time so as to reach a constant temperature. By removing the test piece that has been broken by the tensile tester, the process from supplying the test piece to the tensile tester to removing it is automated.

However, in the conventional tensile test apparatus, only a metal-made test piece having a relatively large thickness and a heavy weight is assumed. For example, the test piece is a film such as a polymer film used for a fuel cell. If it is in the shape, the test pieces cannot be taken out one by one from the cassette by the extrusion means. In addition, even if the test pieces are supplied to the transport device one by one by the operator's hand, the test pieces being transported by the transport device (belt conveyor) are scattered by the air flow in the thermostatic chamber, so the test pieces are subjected to a tensile test. Can't reach the machine. Furthermore, when the inside of a tank is maintained at high humidity using a constant temperature and humidity tank, a film-like test piece will adhere to a conveyance apparatus (belt conveyor), and a test piece may be supplied to a tensile testing machine. Can not. In addition, since the automatic door is opened and closed each time a test piece is supplied to the thermostatic chamber, the humidity in the thermostatic chamber is disturbed when the automatic door is opened. The test had to be interrupted until it returned to the set humidity, which was very inefficient.
Japanese Patent No. 2741623 (page 2, right column, line 11 to page 4, left column, line 4, line 3)

  Therefore, the present invention has been made in view of the above circumstances, and even if the test piece is in the form of a film, it can be reliably and efficiently delivered to a tensile tester installed in a constant temperature and humidity chamber. An object is to provide a test apparatus.

In order to achieve the above object, the invention described in claim 1 of the present invention is a tensile test apparatus in which a holding mechanism for holding both ends of a film-like test piece by a pair of upper and lower grips is provided in a thermostatic bath. Te, the test piece and a test piece holder for transfer can hold the gripping mechanism, a rotary stocker specimen holder disposed in a thermostatic chamber is a plurality arranged on the circumference, the rotation stocker in the specified direction specified angular phase only includes a rotation driving means for Ru rotate driven, and the specimen holder, a pair of the leaf spring member which tip is superimposed on the radial direction of the rotary stocker is provided with upper and lower pairs, clamshell each has been at both ends of the sandwiched specimens by water paper is plugged in between the ends of the pair of leaf spring members provided in the upper and lower pair, designated rotary stocker in the specified direction angle by the rotational driving means Wherein the test strip is passed between the gripping mechanism and the specimen holder by only phase is rotated.
The invention described in claim 2 is characterized in that, in the invention described in claim 1 , the thermostatic chamber is a thermostatic chamber with a humidity control function.

Therefore, in the first aspect of the invention, the rotary stocker installed in the thermostatic chamber by the rotation driving means is rotationally driven in the designated direction by the designated angle phase, so that the gripping mechanism and each test piece holder can be moved. The test piece is delivered. In addition, the test piece is sandwiched between the overlapping tip portions of the pair of leaf spring members of each test piece holder. Further, the test piece is sandwiched between a pair of leaf spring members of each test piece holder via water-resistant paper.
In the second aspect of the invention, the test piece is transferred between the gripping mechanism of the tensile tester installed in the constant temperature and humidity chamber and each test piece holder of the rotary stocker.

  It is possible to provide a tensile test apparatus that can be reliably and efficiently delivered to a tensile tester installed in a constant temperature and humidity chamber even when the test piece is in a film form.

  An embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the tensile test apparatus 1 supplies a test piece 6 (see FIG. 7) to grips 4 and 5 (grip mechanism) of a tensile tester 3 installed in a constant temperature and humidity chamber 2. At the same time, a test piece supply / discharge device 7 for removing the test piece 6 after completion of the tensile test from the grips 4 and 5 is provided. As shown in FIGS. 2 and 3, the tensile testing machine 3 includes a portal frame 10 formed by supporting both ends of the fixed beam 8 with support columns 9, and the portal frame 10 is fixed to the portal frame 10. An elevating beam 11 arranged in parallel to the beam 8 is provided. A hydraulic cylinder 12 as a load cell is installed at the center of the fixed beam 8, and the rod 13 and the upper grip 4 of the hydraulic cylinder 12 are connected via a shaft 14. Further, the lower grip 5 is connected to the elevating beam 11 through a shaft 15. The tensile testing machine 3 adjusts the distance between the upper grip 4 and the lower grip 5 according to the length of the test piece 6 by moving the elevating beam 11 up and down and positioning the lower grip 5 upward and downward. In this state, the elevating beam 11 is firmly fixed to each column 9 of the portal frame 10 and both ends of the test piece 6 are held by the grips 4 and 5.

  The tensile testing machine 3 is structured such that when the hydraulic cylinder 12 is operated and the rod 13 is pulled, the upper grip 4 is moved upward and a tensile stress is applied to the test piece 6. Each of the grips 4 and 5 is formed of a pneumatic grip that generates a grip force by the pressure of supplied air. As shown in FIG. 4, the test piece supply / discharge device 7 includes an air conditioning unit in which a caster 16 is disposed on the bottom surface and adjusts the temperature and humidity of the air supplied to the constant temperature and humidity chamber 2. The lower frame 17 is provided with an upper frame 18 that is provided on the upper surface of the lower frame 17 so as to overhang forward (leftward as viewed in FIG. 4) and in which the temperature and humidity chamber 2 is accommodated. As shown in FIGS. 4 and 5, the test piece supply / discharge device 7 is such that the portion of the upper frame 18 that is overhanged (the left portion of the upper frame 18 in FIG. 4) is the gate of the tensile tester 3. The shape frame 10 is disposed so as to penetrate the upper part inside. As shown in FIG. 1, in the tensile test apparatus 1, the grips 4 and 5 of the tensile tester 3 are surrounded by the constant temperature and humidity chamber 2 of the test piece supply / discharge apparatus 7. A viewing window 23 is provided on the front surface of the upper frame 18 so that the inside of the constant temperature and humidity chamber 2 is visible.

  As shown in FIGS. 1 and 5, the constant temperature and humidity chamber 2 is provided at the lower end portion of the rotating shaft 19 and has a plurality of test pieces 6 around the rotating shaft 19 (see FIG. 7). Is installed so as to be able to be transferred to the grips 4 and 5. As shown in FIG. 1, the rotary stocker 20 has a pair of upper and lower discs 21a and 21b arranged in parallel at a predetermined interval in the axial direction of the rotary shaft 19 (the vertical direction in the drawing in FIG. 1). The rotating body 21 is provided. As shown in FIG. 6, a plurality (ten in the present embodiment) of test piece holders 22 are equally arranged on the circumference of the rotating body 21. As shown in FIGS. 6 and 7, each test specimen holder 22 is a holder plate in which the tip portion protrudes from each disk 21 a, 21 b on each disk 21 a, 21 b of the rotating body 21 of the rotary stocker 20. 24 is provided with a pair of upper and lower sides. Further, leaf spring members 25 and 26 whose base end portions are fixed to the respective side surfaces of the respective holder plates 24 are disposed at the distal end portions of the respective holder plates 24. Further, each holder plate 24 is formed such that the leaf spring members 25 and 26 are overlapped with the curved surface of the tip portion circumscribed.

  Then, the rotary stocker 20 is inserted as shown in FIGS. 6 and 7 by inserting the test piece 6 between the tip ends of the leaf spring members 25 and 26 of the pair of upper and lower holder plates 24 of the test piece holder 22. The test piece 6 is sandwiched between the tip portions of the leaf spring members 25 and 26. Thereby, the test piece 6 is held by the test piece holder 22 in a state where the test piece 6 is substantially orthogonal to the radial direction of each of the disks 21 a and 21 b of the rotating body 21 and both end portions protrude above and below the test piece holder 22. . In the tensile test apparatus 1, when the test piece 6 is inserted between the tip ends of the leaf spring members 25 and 26 of the pair of upper and lower holder plates 24 of each test piece holder 22, both ends of the test piece 6 are folded in two. The water-resistant paper 28 (adhesion prevention member) is inserted. Further, as shown in FIG. 1, the test piece supply / discharge device 7 includes a rotating shaft that is rotatably supported by a bearing 27 provided on the upper frame 18 and protrudes outside the upper frame 18. A pulley 29 is fixed to the upper portion of 19. The test strip supply / discharge device 7 is configured such that the rotation stocker 20 is rotated around the rotation shaft 19 by the pulley 29 being rotated by a stepping motor 31 (rotation drive means) installed on the upper frame 18 via the belt 30. In addition, of the clockwise direction and the counterclockwise direction in FIG. 6, the rotation is driven by the specified angle phase in the direction specified by the motor control unit.

  Further, in the tensile test apparatus 1, the stepping motor 31 rotates the rotary stocker 20 around the rotary shaft 19 in the designated direction by the designated angle phase, and the transfer position (0 around the rotary shaft 19 shown in FIG. The rotary stocker 20 is positioned with respect to the grips 4 and 5 so that the test piece 6 is transferred between the test piece holder 22 and the grips 4 and 5. As shown in FIG. 1, the tensile tester 3 is set in a direction in which the grips 4, 5 are opened and closed in the front-rear direction of the tensile test apparatus 1 (left-right direction as viewed in FIG. 1).

  Next, the operation of the tensile test apparatus 1 will be described. Here, in order to distinguish the test piece 6 and the test piece holder 22 from the other test pieces 6 and the test piece holder 22 held and arranged in the rotary stocker 20, reference numerals 6a to 6j are assigned to the test pieces 6 respectively. At the same time, the test piece holders 22 are given reference numerals 22a to 22j. First, as shown in FIGS. 6 and 7, each test piece 6 a is placed on each test piece holder 22 a to 22 j of the rotary stocker 20 installed in the constant temperature and humidity chamber 2 of the test piece supply / discharge device 7 by an operator. ~ 6j is set. At this time, each test piece 6a to 6j has a difference between the leaf spring members 25 and 26 of the pair of upper and lower holder plates 24 from the left side as viewed in FIG. 7 through the water-resistant paper 28 (sticking prevention means). By being inserted, as shown in FIG. 7, both ends sandwiched between the water-resistant paper 28 are held by the test piece holders 22 a to 22 j in a state of projecting up and down from the test piece holders 22 a to 22 j. And when each test piece 6a-6j is set to each test piece holder 22a-22j, the said thermo-hygrostat 2 will be obstruct | occluded and it will be maintained by setting temperature and humidity.

  Next, the rotary stocker 20 is rotated from the home position of the rotary stocker 20 shown in FIG. 8 (the test piece holder 22a is positioned at the transfer position to the rotary stocker 20 around the rotary shaft 19 as viewed in FIG. 8 in a counterclockwise direction (hereinafter simply referred to as a counterclockwise direction) as viewed in the plane of FIG. 8 from the rotational direction (hereinafter referred to simply as a clockwise direction) in a state of being rotationally driven by an angular phase of 18 degrees. 9), the specimen holder 22a is positioned at the delivery position as shown in FIG. Then, the grips 4 and 5 of the tensile tester 3 are closed, and both end portions of the test piece 6 a are firmly held by the grips 4 and 5 through the water-resistant paper 28. In this state, as shown in FIG. 10, the rotary stocker 20 is rotationally driven counterclockwise by an angle phase of 18 degrees, and the tensile test of the test piece 6a is performed. Then, after the tensile test is completed, the rotary stocker 20 is rotationally driven clockwise by an angular phase of 18 degrees, and the test piece holder 22a is positioned at the delivery position as shown in FIG. , 5 is held between the leaf spring members 25 and 26 of the pair of upper and lower holder plates 24 of the test piece holder 22a and held by the test piece holder 22a. The

  Next, when the grips 4 and 5 are opened and both ends of the test piece 6a are opened, the rotary stocker 20 is driven to rotate counterclockwise by an angle phase of 36 degrees, as shown in FIG. The test specimen holder 22b is positioned at the delivery position. As described above, the tensile test apparatus 1 is configured such that the rotary stocker 20 is rotationally driven in the designated direction by the designated angle phase as necessary, and is positioned at the grips 4 and 5 of the tensile tester 3 and the delivery position. By sequentially transferring the test pieces 6a to 6j to and from the holders 22a to 22j, a tensile test of all the test pieces 6a to 6j held by the rotary stocker 20 is sequentially performed in the constant temperature and humidity chamber 2. Is called.

This embodiment has the following effects.
The tensile test apparatus 1 is provided with a rotary stocker 20 in which a plurality of test piece holders 22 are equally distributed on the circumference in a constant temperature and humidity chamber 2 in which the grips 4 and 5 of the tensile tester 3 are installed. The rotary stocker 20 is driven to rotate in a specified direction by a specified angle phase as required, and the test piece 6 is sequentially transferred between the grips 4 and 5 and the test piece holders 22 positioned at the transfer position. A tensile test of each test piece 6 held in the rotary stocker 20 is sequentially performed.
Therefore, in the present tensile test apparatus 1, each test piece 6 is held by each test piece holder 22 disposed in the rotary stocker 20, so even the film-like test piece 6 is in the constant temperature and humidity chamber 2. Even if the air in the temperature and humidity chamber 2 is set to high temperature and humidity, it will not be scattered by the air current, and it will be attached to the conveyor (belt conveyor) like a conventional tensile test device. Therefore, the test piece 6 can be reliably supplied to the grips 4 and 5 of the tensile tester 3. Further, the present tensile test apparatus 1 is configured from the time when the test piece 6 is set to each test piece holder 22 of the rotary stocker 20 to the time when the tensile test of all the test pieces 6 set to each test piece holder 22 is completed. During this time, the temperature and humidity chamber 2 is closed and the temperature and humidity chamber 2 is maintained at the set temperature and humidity, so that the automatic door is opened and closed and the temperature and humidity chamber 2 is opened as in a conventional tensile testing device. Each time the test piece 6 is carried in, the tensile test can be efficiently performed without interrupting the tensile test until the air in the constant temperature and humidity chamber 2 reaches the set temperature and humidity.
Further, the tensile test apparatus 1 has a water-resistant paper 28 between the front end portions of the plate spring members 25 and 26 of the holder plates 24 that are provided on the test piece holder 22 in a pair of upper and lower ends. Since the test piece 6 is held by the test piece holder 22 through the (sticking prevention means), the test piece 6 and the leaf spring members 25 and 26 of the test piece holder 22 are not attached. Furthermore, since both ends of the test piece 6 are gripped by the grips 4 and 5 of the tensile tester 3 via the water-resistant paper 28 (sticking prevention means), the test piece 6 and the grips 4 and 5 are stuck. Thus, the test piece 6 can be reliably transferred between the grips 4 and 5 of the tensile tester 3 and the test piece holders 22 of the rotary stocker 22.

In addition, embodiment is not limited above, For example, you may comprise as follows.
The constant temperature and humidity chamber 2 may be a constant temperature bath. In this case, the water-resistant paper 28 (sticking prevention means) interposed between the test piece holder 22 and the test piece 6 may be used as necessary.
In the present tensile test apparatus 1, the test piece 6 is held between the tip end portions of the plate spring members 25 and 26 of the holder plates 24 provided on the test piece holder 22 in pairs, and held in the test piece holder 22. However, for example, the leaf spring member 26 may be eliminated and the test piece 6 may be sandwiched and held between the leaf spring member 25 and the tip of the holder plate 24. In this case, the structure of the test piece holder 22 can be simplified.
The tensile test apparatus 1 is configured to rotate the driving means so that the stepping motor 31 is controlled by the motor control unit. However, the tensile testing apparatus 1 is configured to be able to rotate the rotation stocker 20 in a specified direction by a specified angle phase. If so, for example, a servo motor may be used instead of the stepping motor 31.

It is explanatory drawing of this tension test apparatus, and is a side view which shows the relative position of the grip and rotation stocker of a tension tester especially. It is a front view of this tension test device. FIG. 3 is an enlarged view of a main part of FIG. 2. It is a side view of this tension test device. It is explanatory drawing of this tension test apparatus, and is a top view which shows the relative position of the grip of a tension tester, and a rotation stocker especially. It is a top view of a rotation stocker. It is an AA arrow line view in FIG. It is explanatory drawing of this tension test apparatus, and is a top view which shows the state which has a rotation stocker in a home position. It is a figure which shows the state by which the test piece holder holding the test piece initially tension-tested from the state in FIG. 8 was positioned in the delivery position. FIG. 10 is a diagram showing a state in which the test specimen holder is positioned at a standby position during a tensile test after the rotary stocker has been rotationally driven in a designated direction by a designated angle phase from the state shown in FIG. . FIG. 11 is a diagram illustrating a state in which the rotary stocker is rotationally driven in a specified direction by a specified angle phase from the state in FIG. 10 and a test piece after completion of the tensile test is delivered to the original test piece holder. FIG. 12 is a diagram showing a state in which the rotary stocker is rotationally driven in a designated direction by a designated angle phase from the state shown in FIG. 11 and a test piece holder holding a test piece to be second tensile tested is positioned at a delivery position.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Tensile test apparatus, 2 Constant temperature and humidity chamber, 3 Tensile tester, 4, 5 Grip (gripping mechanism), 6 Test piece, 20 Rotation stocker, 22 Test piece holder, 25, 26 Leaf spring member, 28 Water-resistant paper (Paste Prevention means), 31 stepping motor (rotation drive means)

Claims (2)

A tensile test apparatus in which a holding mechanism for holding both ends of a film-like test piece by a pair of upper and lower grips is provided in a thermostatic bath ,
A specimen holder for holding the specimen so as to be transferred to the gripping mechanism;
A rotary stocker which the specimen holder is a plurality arranged in a circle provided in the thermostatic chamber,
A rotary drive means you want to rotate. Drive by a specified angular phase of the rotary stocker in the specified direction,
Comprising
The test piece holder is provided with a pair of upper and lower leaf spring members whose tip portions are overlapped in the radial direction of the rotary stocker,
Each of the both ends of the test piece sandwiched between two folded water-resistant paper is inserted between the tip portions of a pair of upper and lower leaf spring members,
Tensile testing apparatus, wherein the test strip is passed between the gripping mechanism and the specimen holder by the rotation stocker is rotated by a specified angle phase in the specified direction by the rotation driving means. The tensile testing apparatus according to claim 1 , wherein the thermostatic chamber is a thermostatic chamber having a humidity control function.

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