JPH06313751A - Tensile testing device - Google Patents

Abstract

PURPOSE:To maintain a test piece to be at a constant high temperature and to increase the number of tests per day by laying out a tensile testing part, a supply collection part, and a transport preheating part inside a constant temperature bath and then providing an air curtain at the opening for loading and unloading the test piece of the constant temperature bath. CONSTITUTION:A tensile testing part 18, a supply collection part 20, and a transport preheating part 22 are laid out inside a constant temperature bath 10 and then an air curtain is provided at an opening 10a for loading and unloading a test piece 7. The transport preheating part 22 transports the preheated test piece 7 to the supply collection part 20. Namely, the test piece 7 is supplied to a rotation arm 58 of the supply collection part 20 using belt conveyers 74, 74 provided nearly vertically for the conveyer for supplying the sample outside the constant temperature bath 10. The supply collection part 20 rotates the arm 58 and supplies the test piece 7 to a chuck part 24 of a tensile test part 18 by rotating the arm 58 and then collects the test piece after the tests ends. The test pieces 7 for a required number of collections are sent to the constant temperature bath 7 successively and are repeated inside the thermally insulated constant temperature bath 10 for a specific amount of time, thus increasing the count for testing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tensile test device. More specifically, the present invention relates to a tensile tester that measures physical properties of a test piece under a predetermined temperature range.

[0002]

2. Description of the Related Art One of the important things in conducting a physical property test, which is indispensable for research and development and quality control, is to place a test piece under conditions suitable for the actual situation. For example, a vulcanized rubber as a tire material is subjected to a tensile test, which is one of physical property tests. The tire generates heat due to bending and stretching of the tire due to rotation. Therefore, in order to obtain effective data for tensile test specimens (generally dumbbell-shaped specimens) made of vulcanized rubber, the specimens should normally be in the same high temperature condition as the temperature of the tire during vehicle running. Therefore, the test piece is tested after being preheated in a constant temperature bath set to a predetermined high temperature.

[0003]

However, in the prior art, every time a tensile test is performed on each test piece in a constant temperature oven, the test piece inlet / outlet opening of the constant temperature oven is opened / closed to take in / out the test piece. Therefore, the amount of heat released from the opening is large, and it is difficult to maintain the constant temperature bath at a predetermined high temperature. For this reason, the next test must be waited until the temperature of the constant temperature bath once lowered reaches the predetermined high temperature, and in some cases, only a few tests can be performed per day. Therefore, the efficiency of the test was extremely poor. Further, although the test pieces are preheated at a set temperature for a predetermined time, one of the causes of the delay is that each test piece is preheated. The present invention is intended to solve the above-mentioned conventional problems, and the problem to be solved is to sequentially send a tensile test piece for performing a tensile test a required number of times to a constant temperature bath, and set a predetermined temperature at a predetermined temperature. In a device that preheats for a period of time and conducts a tensile test, the opening for inserting and removing the test piece of the constant temperature bath prevents high temperature air from leaking from the constant temperature bath. To increase the number of tests that can be performed per day.

[0004]

The tensile testing device according to the present invention is intended to solve the above problems and is as follows. That is, the tensile test apparatus according to the present invention, a tensile test part for gripping and pulling a test piece for tensile test with a chuck part, and supplying the test piece to the chuck part of the tensile test part and a tested test A supply / recovery section for collecting the pieces, a transfer preheating section for transferring the test pieces toward the supply / recovery section and preheating a plurality of the test pieces during the transfer, and a tensile test section, a supply / recovery section, and a transfer section. And a constant temperature bath in which the preheating section is arranged. Further, in the tensile test apparatus according to the present invention, the tensile test test piece has an opening for loading and unloading a test piece for carrying in the test piece from the outside of the constant temperature bath into the inside of the constant temperature bath, Has an air curtain.

[0005]

Therefore, according to the tensile test apparatus of the present invention, the tensile test section, the supply / recovery section and the transport preheating section are arranged inside the thermostatic chamber, and a plurality of test pieces are preheated by the transport preheating section. The plurality of test pieces maintain the preheating temperature in the constant temperature bath even after being preheated by the transport preheating unit. Then, all of the plurality of test pieces, while maintaining their preheating temperature, are brought from the transport preheating section to the tensile testing section by the supply / recovery section, and then each in a constant temperature bath at a predetermined high temperature. A tensile test is performed for each test piece. Further, since the air curtain is provided at the opening for inserting and removing the test piece, the air impedes the air permeability between the outside and the inside of the constant temperature bath.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The tensile test apparatus 1 of the present invention will be described in detail below with reference to the accompanying drawings with reference to the accompanying drawings. FIG. 1 is a perspective view showing an overall image of a tensile test apparatus according to the present invention, FIG. 2 is a perspective view showing a flow from the time when a dumbbell-shaped test piece is supplied from a cassette magazine to the end of the test, and FIG. 3 is a tensile test system. 4 is an enlarged perspective view showing the sample supply system, FIG. 5 is a diagram showing the relationship between the transport preheating unit, the first transport robot, the screw conveyor and the second transport robot, and FIG. FIG. 7 is a diagram showing the relationship between the system and the screw conveyor, and FIG. 7 is a diagram showing the relationship between the tensile test unit, the supply / recovery unit, and the transport preheating unit.

As shown in FIG. 1, the tensile test apparatus 1 comprises a main body 2 and a control section 4. The main body 2 has a tensile test system 6 for performing a tensile test as shown in FIG. 2, a sample supply system 8 for supplying a dumbbell-shaped test piece 7 to the tensile test system 6, and a dumbbell-shaped test piece 7 for marking the marked line. And a hardness measuring system 11 for measuring the hardness of the dumbbell-shaped test piece 7, which are contained in the case 2a.

The tensile test system 6 is shown in FIGS.
As shown in FIG. 1, a gaze tracking device 1 that traces a constant temperature bath 10 to be tested and a so-called gaze 14 attached to a dumbbell-shaped test piece 7 as a tensile test specimen during a tensile test.
It consists of 6 and 6. The thermostatic chamber 10 is a hollow body having an appropriate shape, and has a test piece loading / unloading opening 10a as an opening formed therein, and a dumbbell from the sample supply system 8 into the thermostatic chamber 10 through the test strip loading / unloading opening 10a. The test pieces 7, 7 ... Are carried in. An air curtain by well-known means (not shown) is provided in the opening 10a for inserting and removing the test piece as an opening. Further, the constant temperature bath 10 contains therein a tensile test unit 18, a supply / recovery unit 20, and a transport preheating unit 22.

The tensile test section 18 is a dumbbell type test piece 7.
Is a portion for performing a tensile test by gripping and pulling with a chuck portion described later. The tensile test section 18 is mechanically
A chuck part 24 for sandwiching the dumbbell-shaped test piece 7 using an appropriate sandwiching means such as pneumatic means, and a chuck drive for moving upper and lower chucks of the chuck portion 24, which will be described later, closer to and further away from each other in the vertical direction. Part 26 and load cell 2 for measuring the tensile strength when a tensile test is performed
8 and. The chuck part 24 is composed of an upper chuck 30 and a lower chuck 32 which are vertically spaced apart from each other to some extent. Each of these chucks 30 and 32 has a top 3
The upper and lower ends 7a and 7b of the dumbbell-shaped test piece 7 are sandwiched via 0a30a and 32a32a (see FIG. 3). The upper chuck 30 is immovable with respect to a post body of the chuck drive unit 26, which will be described later, and the lower chuck unit 32 is movable with respect to the post body.

The chuck drive unit 26 includes a lower chuck 32.
As shown in FIG. 3, it comprises a pillar-shaped support body 34 and a drive screw body 36. The pillar body 34 has a vertically long pillar 40 with the driving screw body 36 and the upper and lower chucks 30 and 32 positioned therebetween.
40 and a pillar body head 42 connected to the pillars 40 and 40 at the upper ends of the pillars 40 and 40. And the pillar 4
An unillustrated lower end portion of 0.40 is fixed to an unillustrated bottom plate of the main body 2 by an appropriate fixing means.

The drive screw body 36 includes two rod-shaped screws 46 and 46, a crosshead 47 connecting the rod-shaped screws 46 and 46, and belt wheels 48 and 48 provided at the lower ends of the rod-shaped screws 46 and 46. Belt wheel 48
Belt 50, 50 for transmitting power to 48, and drive motor 52 for rotating rod-shaped screw 46, 46 via belt 50, 50 and belt wheel 48, 48. The rod-shaped screws 46, 46 are appropriately separated from each other and are rotatably supported by the strut body head 42 of the strut body 34, and extend vertically with the upper and lower chucks 30, 32 interposed therebetween. The male screw 46a is a rod-shaped body formed in a spiral shape at the center in the vertical direction.

The crosshead 47 has a rod-shaped screw 46.
The rod-shaped screw 46, 46 is connected to the shaft 46 and moves vertically along the male screw 46a of the rod-shaped screw 46. That is, since the crosshead 47 has screw holes 47a and 47a formed at both ends thereof with female screws (not shown) that are screwed into the male screws 46a of the screws 46 and 46,
After inserting the rod-shaped screws 46, 46 into the screw holes 47a, 47a, the power of the drive motor 52 is set to the belts 50, 50,
Rod-shaped screw 46,46 via belt wheel 48,48
To the screw head 47a.4.
7a female screw and rod-shaped screw 46, 46 male screw 46
The fact that the a is screwed together with the fact that the rotation of the crosshead 47 is blocked by the two rod-shaped screws 46, 46 located at both ends thereof causes the rod-shaped screws 46, 46 to rotate. Move up and down. Further, a support rod 54 extending upward is provided substantially at the center of the crosshead 47, and the lower chuck 32 is supported and fixed via the support rod 54.

The drive motor 52 is attached to the bottom plate in the constant temperature bath, and a drive pulley 54 connected to the belt 50 is attached to the rotation shaft of the drive motor 52.

The load cell 28 is provided substantially at the center of the strut body head 42, and a support shaft 56 connected to a load button (not shown) of the load cell 28 penetrates the strut body head 42 at its lower end. And the upper chuck 30 is attached to the lower end of the support shaft 56.

The supply / recovery section 20 shown in FIGS. 2 and 7 is interposed between the transport preheating section 22 and the chuck section 24, and the dumbbell-shaped test piece 7 is attached to the chuck section 24.
Is supplied through the rotating arm portion 58, and after the test is completed,
It is to be collected. The supply / recovery unit 20 rotates the rotary arm unit 58 in a virtual vertical plane including a vertical line, and the rotary arm unit 58 within a desired rotary range in the vertical plane (conveyance preheating in this embodiment). It consists of a rotary linear cylinder 60 that moves in a 90 ° range between the portion 22 and the chuck portion 24) and reciprocates in the horizontal direction.

The rotating arm portion 58 has a crank shape. That is, the rotating arm portion 58 includes the first arm portion 61 whose base end portion 61 a is connected to the rotating rectilinear cylinder 60,
A second arm portion 62 that is bent substantially at a right angle from the tip end portion of the first arm portion 61, and a third arm portion 63 that is bent at a right angle in the direction in which the first arm portion 61 extends from the tip end of the second arm portion 62, The third arm portion 63 is provided with a clamp portion 64 that is provided at the tip and clamps the dumbbell-shaped test piece 7. Then, the rotating arm unit 5
When the dumbbell test piece 7 is supplied to the chuck part 24 of the tensile test part 18, the dumbbell test piece 8 automatically supplies the next dumbbell test piece 7 forward. In 22, the sample supply system 8 is moved to the opposite side of the transport shaft described later.

The rotary rectilinear cylinder 60 comprises a cylinder body 70 and a shaft 72. The cylinder body 70 has a structure in which the shaft 72 is rotated within a desired rotation range of 90 ° and the shaft 72 is reciprocated in the horizontal direction. The tip portion 72a of the shaft portion 72 has the first arm portion 61.
Is fixed to the base end portion 61a of the.

The transport preheating unit 22 is the above-mentioned supply / recovery unit 2.
The dumbbell-shaped test piece 7 is conveyed to 0, and a plurality of dumbbell-shaped test pieces 7 are preheated before the conveyance. Also,
The transport preheating unit 22 is formed by connecting a plurality of belt conveyors 74, 74, ... Which extend in a horizontal direction substantially at right angles to a screw conveyor of the sample supply system 8 shown in FIGS. Therefore (in this embodiment, three units are shown), and the belt conveyor drive motor 7
Driven by 6. And the belt conveyor 74.7
A plurality of dumbbell-shaped test pieces 7 are provided on the transport surface 75 of 4 ...
····················································. Is preheated before the tensile test.

The marking line tracking device 16 is located outside the thermostatic chamber 10 and is provided corresponding to the chuck section 24.
It corresponds to the watermark window 10b of 0.

The sample supply system 8 shown in FIG. 4 is arranged outside the constant temperature bath 10, and has a cassette loading section 76,
It comprises a first transfer robot 77, a screw conveyor 78, and a second transfer robot 80. As shown in FIG. 5, the cassette loading section 76 includes a cassette magazine 82 and a cassette 8
.., a cassette push-up plate 86, and a cassette motor 88.

The cassette magazine 82 is erected at an appropriate position on the bottom plate (not shown) of the main body 2, a part of one side surface of the hollow rectangular parallelepiped is cut out in the longitudinal direction, and the horizontal cross section is C-shaped and at least the upper end is formed. It has an open channel shape. The cutout portion is a slide groove 82a into which one end of the cassette push-up plate 86, which will be described later, is inserted and the push-up plate 86 slides. Further, the cassette magazine 82 is loaded with the thin plate-shaped cassettes 84, ...

The cassette 84 comprises a dumbbell type test piece 7 and a sample case 90 in which the dumbbell type test piece 7 is placed. The cassette push-up plate 86 has an elongated thin plate shape, but has a central portion 86a cut out along one side edge in the longitudinal direction, whereby the central portion 86a has a small width dimension and both end portions 86b and 86c have a large width dimension. It has a shape. The cassette push-up plate 86 has one end portion 86b of both end portions 86b and 86c,
The cassette magazine 82 is inserted into the slide groove 82a so as to be slidable, and the other end portion 86c is formed with a female screw that is screwed with a male screw formed on a rotation shaft of the cassette motor 88 described later. A screw hole 92 is provided.

The cassette motor 88 has a rotary shaft 88.
The main body 88b is arranged in the vicinity of the cassette magazine 82 so that a extends downward toward the bottom plate (not shown) of the main body 2. The rotary shaft 88a has an appropriate length dimension according to the length of the cassette magazine 82, and a male screw is formed on the outer surface thereof.

Then, the one end portion 8 of the cassette push-up plate 86 is
6b is inserted into the slide groove 82a of the cassette magazine 82, and the cassette motor 88 is inserted into the screw hole 92 of the other end portion 86c.
When the rotary shaft 88a is inserted by screwing the female screw and the male screw, the one side 82b of the cassette magazine 82 comes to fit in the notched central portion 86a of the cassette pushing-up plate 86. For this reason, the cassette 84 is inserted into the cassette magazine 82 from its upper end opening, and the cassette motor 88 is inserted.
Drive the cassette push-up plate 86,
b is inserted in the slide groove 82a of the cassette magazine 82, and the other end portion 86c is the motor 88 for cassette.
The cassette push-up plate 86 slides vertically along the slide groove 82a and the rotation shaft 88a to move the cassette 84 of the cassette magazine 82 up and down. Then, in relation to the first transfer robot 77, which will be described in detail below, it stops at an optimum position by an appropriate position sensor (not shown).

As shown in FIG. 5, the first transfer robot 77 is arranged above the cassette magazine 82 and comprises a moving arm cylinder 94 and a suction section 96. The moving arm cylinder 94 approaches or moves away from the screw conveyor 78 in order to convey the dumbbell-shaped test piece 7 to the screw conveyor 78 (hereinafter, approaching or moving away from the screw conveyor 78 is simply referred to as “contact and separation”). ), Which includes a cylinder body 98 and a moving arm 100.

The cylinder body 98 has a rectangular parallelepiped shape, and is attached to the screw conveyor 78 at an appropriate position on the body 2 so that its longitudinal direction is substantially at a right angle. The moving arm 100 reciprocates between the cassette loading portion 76 and the screw conveyor 78 in the longitudinal direction of the cylinder body 98, and moves vertically toward and away from the upper end opening of the cassette magazine 82.

The suction part 96 is for sucking the dumbbell-shaped test piece 7, and is provided on the base plate 102 and a pair of suction cups 104a, 104a and 104b connected to a compressor (not shown).
・ It consists of 104b. The base 102 is the moving arm 10
It is a rectangular plate-like member provided at the bottom of 0.
The suction cup 104a directly sucks the dumbbell-shaped test piece 7 contained in the sample case 90 in the cassette magazine 82. The suction cup 104b is for sucking the empty sample case 90 after the dumbbell-shaped test piece 7 is absorbed by the suction cup 104a. The empty sample case 90 is used for the cassette magazine 82.
In parallel with the anti-conveying shaft 106b of the cassette magazine 82
It is stored in the empty case storage cylinder 91 arranged on the side.

The screw conveyor 78 includes a suction cup 104a.
The purpose is to send the dumbbell-shaped test piece 7 sucked by 104a to the transport preheating unit 22, and as shown in FIG. 4, the dumbbell is placed on the drive motor 106 and the transport shaft of the drive motor 106, which will be described later. And a mounting table 108 for carrying the mold test piece 7 to a predetermined position. It should be noted that although a plurality of mounting tables 108 are shown, this is merely shown for convenience of explanation, and the number of mounting tables 108 is actually one.

The drive motor 106 comprises a main body 106a and a conveying shaft 106b. The main body 106a is horizontally arranged so as to bridge the transport shaft 106b with the hardness measuring system 11. The transport shaft 106b is mounted on the mounting table 1
08 is sent to displacement positions S1 to S7 described later, and is rotated by the main body 106a.
Further, the transfer shaft 106b includes the cylinder body 98 of the first transfer robot 77 and the belt conveyor 74 of the transfer preheating unit 22.
.. 74 and the second transfer robot 80 and the cylinder body 109, which will be described later, are arranged so as to be orthogonal to each other. In addition, a male screw is formed on the transport shaft 106b and is screwed with a screwing portion of the mounting table 108 described later.

The mounting table 108 is in the form of a root of a single-toothed geta, and has a mounting portion 110 and a screwing portion 112 integrally formed. The mounting part 110 is configured to fix the dumbbell test piece 7 by an appropriate position deviation preventing means (not shown) provided at a predetermined position on the upper surface 110a. Further, in the mounting portion 110, in order to prevent the mounting portion 110 from rotating due to the rotation when the transport shaft 106b rotates via the screwing portion 112 that is in screwing relation with the transport shaft 106b. Rotation preventing means (not shown) is provided in relation to the main body 2. In this way, the mounting portion 11
Even if 0 is moved by the movement of the transport shaft 106b,
The dumbbell test piece 7 on the upper surface 110a is prevented from being displaced. The screwing portion 112 has a through hole (not shown) formed substantially in the center thereof.
A female screw that is screwed with the male screw of the transport shaft 106b is formed. In the mounting table 108, the screwing portion 112 is screwed with the transport shaft 106b in a state where the mounting portion 110 is prevented from rotating with respect to the main body 2.
With the rotation of the transport shaft 106b, the dumbbell-shaped test piece 7 is displaced to the positions S1 to S7 shown in FIGS. 2 and 4, and the thickness measurement, the marked line coloring, and the hardness measurement of the dumbbell test piece 7 are performed. When the predetermined preparation before the equal tension test is completed, the process moves from S7 to S2 all at once. In addition, S1
The meaning of S7 is as follows.

S1 is the starting end position of the screw conveyor 78, that is, the point where the mounting table 108 starts, and the dumbbell-shaped test piece 7 carried from the cassette magazine 82 by the first transfer robot 77 is placed in this S1. It is placed on a table 108. In S2, the dumbbell test piece 7 is placed in the thermostatic chamber 10 via the second transfer robot 80 after the predetermined preparations such as the thickness measurement, the marking of the dumbbell and the hardness measurement before the tensile test are completed. It is a place to carry in. S3 is a portion for measuring the thickness of the dumbbell test piece 7 with a thickness gauge described later. S4 and S5 are locations for applying the white powder for the ground and the marked line to the dumbbell test piece 7 by the marked line adhering system 9 of FIG. 2, respectively. S6 is a standby position before shifting to S7, and together with the next S7, the hardness measuring system 11
Is placed in a thermostat, not shown, different from the thermostat 10. In S7, a part of the dumbbell test piece 7 is sheared for hardness measurement by the cutter cylinder described later, and the hardness measurement system 11 prepares for hardness measurement. The mounting table 108 is S
When moving to the positions of 6 and S7, it goes through an opening (not shown) of the separate constant temperature bath. An air curtain is arranged in this opening as well as the opening 10a for inserting and removing the test piece in the thermostatic chamber 10.

The second transfer robot 80 is shown in FIGS.
As can be seen, after the mounting table 108 reaches the position of S2 after passing through S3 to S7 to S3, the dumbbell-shaped test piece 7 on the mounting table 108 is conveyed and the belt conveyor 7 of the preheating unit 22 is conveyed.
Which is to be transported to 4.74 ...
The transfer shaft 106b is placed between and, and the transfer shaft 106b is positioned so as to face the transfer preheating unit 22. The second transfer robot 80 includes a belt conveyor moving cylinder 114 and a suction unit 116.

Cylinder 114 for moving belt conveyor
Is for conveying the dumbbell-shaped test piece 7 to the screw conveyor 78, and includes a cylinder body 118 and a moving arm 120. The cylinder main body 118 has a rectangular parallelepiped shape, and is attached to an appropriate portion of the main body 2 so that its longitudinal direction is substantially perpendicular to the screw conveyor 78. The moving arm 120 is mounted on the mounting table 10 at the position S2 in the longitudinal direction of the cylinder body 118.
8 and the belt conveyors 74, 74, ... of the transport preheating unit 22 and reciprocate, and the mounting unit 11 of the mounting table 108.
The dumbbell-shaped test piece 7 placed on 0 is brought into contact with and separated from the mounting portion 110 in the vertical direction in order to suck the dumbbell-shaped test piece 7 via a suction cup described later.

The suction part 116 comprises a rectangular base 122 provided on the lower part of the moving arm 120, and suction cups 124a, 124a provided at both ends of the base 122 and connected to a compressor (not shown).

The marking line attaching system 9 which is well understood in FIG.
It is arranged along the transfer shaft 106b in the screw conveyor 78, and includes a stamp robot 125 and a coloring container 126. The stamp robot 125
The marked line 1 is attached to the dumbbell-shaped test piece 7 placed on the placing table 108.
4, which is a moving arm cylinder 128
And a marking cylinder 130. The moving arm cylinder 128 includes a cylinder body 132 and a moving arm 134. The cylinder main body 132 has a rectangular parallelepiped shape, and is attached to an appropriate portion of the main body 2 so that its longitudinal direction is substantially perpendicular to the transport shaft 106b. The moving arm 134 reciprocates between the transport shaft 106b and the coloring container 126 in the longitudinal direction of the cylinder body 132.

The marking cylinder 130 is a base 13
1, a base marking cylinder 136 and a marking line marking cylinder 138, which are provided at both ends of the base 131, respectively. Marking cylinder for base 1
36 is a base color for attaching the marking 14 to the dumbbell-shaped test piece 7, for example, a white powder described later is attached before attaching the marking 14 to the dumbbell-shaped test piece 7, and the white powder is first applied. By attaching it, the marked line 14 becomes clear. The base marking cylinder 136 includes a cylinder portion 136a that expands and contracts in the vertical direction, and a stamp portion 136b attached to the tip of the cylinder portion 136a. The marking line marking cylinder 138 is to mark the dumbbell-shaped test piece 7 to which white powder has been applied by the ground marking cylinder 136 with the marking line 14, and includes a vertically extending cylinder portion 138a and a cylinder portion 138a.
And a stamp portion 138b attached to the tip of the.

The coloring container 126 has a rectangular flat plate shape and is divided into two parts in the longitudinal direction thereof. One of the compartments 116a is a white powder for the base, and the other compartment 116b is a marked line. Each of the color pigments is separately contained. In the marking line attaching system 9, the stamper 136b of the ground marking cylinder 136 and the stamping portion 138b of the marking cylinder 138 are placed before the mounting table 108 comes to the positions S4 and S5. In order to attach the white powder and the coloring pigment respectively to the moving arm cylinder 128, the moving arm 134 of the moving arm cylinder 128 moves toward the compartments 126a and 126b of the coloring container 126, and the white powder and the stamp parts 136b and 138b respectively. After attaching the color pigment, the process returns to the position corresponding to S4 and S5. In FIG. 2, reference numerals 144 and 146 represent a thickness gauge and a cutter cylinder, respectively.

In the thickness gauge 144, the dumbbell type test piece 7 is
It measures whether the thickness is within a predetermined reference thickness, and is arranged between the stamp robot 125 and the second transfer robot 80. Further, the thickness gauge 144 automatically measures the wall thickness of the dumbbell-shaped test piece 7 when the mounting table 108 comes to the position of S3.

The cutter cylinder 146 automatically measures the tip portion 7a of the dumbbell-shaped test piece 7 when the mounting table 108 comes to the position S7 in order to measure the hardness of the dumbbell-shaped test piece 7 by the hardness measuring system 11. It is cut into an appropriate size, and is placed together with the hardness measuring system 11 in a thermostat which is not shown and is different from the thermostat 10.

The hardness measurement by the hardness measuring system 11 placed in the separate constant temperature bath is performed in the separate constant temperature bath. Since the hardness measuring system 11 itself is well known, its explanation is omitted.

Computer system 4 as control unit
Is electrically connected to the main body 2 and is set by inputting necessary data such as the distance between marked lines, the test speed, the temperature / humidity in the constant temperature chamber or the width / thickness of the dumbbell-shaped test piece 7. Various operations of the main body 2 are automatically controlled according to the conditions.

According to the tensile test apparatus 1 thus constructed, the tensile test is completed through the following steps. (1) When the main body 2 is started using the computer system 4, the cassette loading section 7 located outside the constant temperature bath 10
6, the cassette motor 88 is driven to drive the cassette push-up plate 8
6 is moved up or down, or a combination thereof, to feed the cassette 84 to a position most suitable for suction by the suction unit 96 of the first transfer robot 77, and automatically stop at that position. At this time, the suction cup 104a of the suction unit 96
104a is located almost directly above the upper end opening of the cassette magazine 82, and waits until the cassette 84 reaches the optimum position.

(2) When the cassette 84 reaches the optimum position, the moving arm 100 approaches the cassette 84. Then, after sucking the dumbbell-shaped test piece 7 with the suction cups 104a and 104a, the dumbbell-shaped test piece 7 is attracted and moved upward. By this movement, the dumbbell-shaped test piece 7 is removed from the sample case 90, and the sample case 90 becomes an empty case and remains in the cassette magazine 82.

(3) When the moving arm 100 sucking the dumbbell-shaped test piece 7 moves up to a predetermined position, the moving arm 100 moves toward the screw conveyor 78 along the longitudinal direction of the cylinder main body 98, and the screw is moved. When it reaches the starting end S1 of the conveyor 78, it stops there. After that, the moving arm 100 descends toward the mounting portion 110 of the mounting table 108, and when it comes to the mounting portion 110, the suction cups 104a.
04a automatically stops the suction and separates the dumbbell-shaped test piece 7 from the suction cups 104a and 104a. As a result, the dumbbell-shaped test piece 7 is placed on the placing part 110.

(4) When the dumbbell-shaped test piece 7 is placed on the mounting table 108 at the starting end S1, the transport shaft 106b of the drive motor 106 rotates, and the mounting table 108 on which the dumbbell-shaped test piece 7 is placed is It moves to S3 without stopping at S2.

(5) When the dumbbell-shaped test piece 7 is moved to S3, the thickness of the dumbbell test piece 7 is measured by the thickness gauge 144. (6) When the thickness measurement is completed, the dumbbell test piece 7 is S4.
Move towards. Prior to this, at a position corresponding to S4 and S5, the stamp robot 125 causes the stamping portion 136b of the background marking cylinder 136 to move.
And the stamp portion 138b of the marking cylinder 138 for the marking line are in a standby state with the white powder and the color pigment attached thereto, respectively.

(7) When the movement of the dumbbell test piece 7 to S4 is completed, the cylinder portion 136a of the ground marking cylinder 136 of the stamp robot 125, which has been waiting in advance at the position corresponding to S4 and S5, extends downward. The white powder attached to the stamp portion 136b is attached to the dumbbell test piece 7.

(8) The dumbbell test piece 7 to which the white powder is attached moves to S5 after that. S5 of dumbbell test piece 7
When the movement to the end is completed, the marking line marking cylinder 138 of the marking cylinder 130 of the stamp robot 125 extends downward through the cylinder portion 138a,
The color pigment 142 attached to the stamp portion 138b is attached onto the white powder 140 of the dumbbell test piece 7.

(9) Dumbbell test piece 7 with a marked line 14
After that, is moved to a constant temperature bath S6 different from the constant temperature bath 10 and temporarily stands by there. (10) The dumbbell test piece 7 temporarily held in S6 is S7.
And the tip portion 7a is sheared. The hardness of the sheared tip portion 7a is measured by the hardness measuring system 11.

(11) The dumbbell test piece 7 with the tip portion 7a sheared moves this time from S7 to S2 all at once. At this time, the second transfer robot 8 is provided above S2.
Zero moving arm 120 is pre-positioned. Then, when the movement of the dumbbell test piece 7 to S2 is completed, the moving arm 120 descends toward the dumbbell test piece 7 located at S2, and the suction cups 124a and 124a of the suction section 116.
The dumbbell test piece 7 is sucked by.

(12) The moving arm 120 that has sucked the dumbbell test piece 7 then rises while sucking the dumbbell test piece 7, and the start ends of the belt conveyors 74, 74, ... Of the transport preheating section 22 in the constant temperature bath 10. It moves toward the upper part (the part indicated by the chain double-dashed line in FIG. 7) and enters the constant temperature bath 10. When the moving arm 120 enters the constant temperature bath 10, the moving arm 120 passes through the test piece loading / unloading opening 10a. At this time, since the air curtain is provided in the test piece inlet / outlet opening portion 10a, the moving arm 120 enters or exits the constant temperature bath 10 by this, which causes a large temperature in the constant temperature bath 10. No change will occur.

(13) When the moving arm 120 comes to the upper part of the starting end in the constant temperature bath 10, the moving arm 120 automatically descends and moves toward the starting end. Upon arrival at the starting end, the suction cups 124a, 124a of the suction unit 116 stop the suction and place the dumbbell test piece 7 on the starting end.
At this time, the dumbbell test piece 7 is the belt conveyor 74.7.
4 ... are placed substantially at right angles to the longitudinal direction and horizontally, and the surface marked with a mark 14 faces upward. (14) When the dumbbell test piece 7 is placed at the starting end portion through the above path or slightly before that, the preheating means as the heat source (not shown) of the transport preheating portion 22 operates to perform the dumbbell test. Start preheating piece 7. At the start of this preheating, the belt conveyors 74, 74, ... Rotate in the direction of arrow A shown in FIG. 2 so as to move the dumbbell test piece 7 at the starting end to the supply / recovery section 20, and move the dumbbell test piece 7 to the next position. Move to the position of.

(15) The moving arm 120 having the dumbbell test piece 7 placed at the position of the starting end automatically returns to the upper part of S2, and in order to place the next dumbbell test piece 7 on the starting part at the upper part. Wait. (16) In this way, ten dumbbell test pieces 7 are placed in the transport preheating section 22 in sequence, and when the eleventh dumbbell test piece 7 is sent, the first dumbbell test piece 7 is preheated. finish. (17) The first dumbbell test piece 7 that has been preheated is clamped by the clamp portion 64 of the rotating arm portion 58 of the supply / recovery portion 20, which is on standby in advance at the end of the transport preheating portion 22 and is indicated by a two-dot chain line in FIG. 7. The shaft 72 of the rotary straight-moving cylinder 60 is simultaneously clamped by the belt conveyor 74.
The first dumbbell test piece 7 that has moved in a direction away from the horizontal direction and has completed the preheating is the belt conveyor 74.
74 ..

(18) When the first dumbbell test piece 7 is separated from the belt conveyors 74, 74, ..., The belt conveyors 74, 74 ,. 1 at the beginning of 74 ...
A space for placing the first dumbbell test piece 7 is made on the belt conveyors 74, 74 ... In this way
On the belt conveyors 74, 74, ..., Ten dumbbell test pieces 7, 7, ... Are always placed, and are sequentially heated to a predetermined preheating temperature.

(19) The first dumbbell test piece 7 separated from the belt conveyors 74, 74, ... When the rotating arm portion 58 is rotated 90 ° by the rotation of the rotating rectilinear cylinder 60, the chuck of the tensile test portion 18 is chucked. Corresponding to the portion 24, they are located at some distance. At this time, the dumbbell test piece 7 is in a vertical state. In this state, when the rotary rectilinear cylinder 60 moves horizontally toward the chuck portion 24 and reaches a predetermined position, the dumbbell test piece 7
In the vertical state, the upper and lower ends 7a and 7b are sandwiched by the upper chuck 30 and the lower chuck 32 of the chuck portion 24, respectively, by the tops 30a, 30a and 32a, 32a. As a result, the dumbbell test piece 7 is set in the tensile test section 18.

(20) As shown in FIG. 3, the tensile test part 1
When the dumbbell test piece 7 is set in 8, the drive motor 52 of the chuck drive unit 26 rotates in a predetermined direction, and the power thereof is the drive pulley 54, the belts 50 and 51, and the belt wheel 48.
・ It is transmitted to the rod-shaped screws 46 ・ 46 via 49,
The rod-shaped screws 46, 46 rotate in the same direction. Then, the cross head 47 and the lower chuck 32 provided on the cross head 47 are lowered by the rotation of the rod-shaped screws 46, 46, and the dumbbell test piece 7 is pulled downward to start the tensile test. Then, the load cell 28 and the marking line tracking device 16 function in accordance with this tensile test, and the elongation rate and tensile stress at this time are measured.

According to the present invention as described above, however, the tensile test section 18, the supply / recovery section 20, and the transport preheating section 22 are arranged inside the constant temperature bath 10, and a plurality of dumbbell test pieces 7b are used as the transport preheating section 22. Since it is preheated and set to a predetermined preheating temperature, the plurality of dumbbell test pieces 7b maintain the predetermined preheating temperature in the constant temperature bath 10 even after being preheated by the transport preheating unit 22. Then, all of the plurality of dumbbell test pieces 7b are brought to the tensile test section 18 from the transport preheating section 22 by the supply / recovery section 20 in a state where the preheating temperature is kept, and thereafter, to a predetermined high temperature. Each dumbbell test piece 7b in the thermostatic chamber 10
Each tensile test is performed.

Further, the second transfer robot 80 passes the dumbbell test piece 7b prepared outside the thermostatic chamber 10 into the transfer preheating section 22 and the opening 10a for inserting and removing the test piece.
Since the air curtain is provided in the room, the air impedes the air permeability between the outside and inside of the thermostatic chamber. In addition,
In this embodiment, the tensile test in the high temperature constant temperature bath is described, but it goes without saying that the test may be performed in the low temperature state.

[0059]

According to the tensile test apparatus of the present invention, the tensile test section, the supply / recovery section and the transport preheating section are arranged inside the thermostatic chamber, and a plurality of test pieces are preheated by the transport preheating section. The test piece of No. 1 maintains the preheating temperature in the constant temperature bath even after being preheated by the transport preheating unit.
Then, all of the plurality of test pieces, while maintaining their preheating temperature, are brought from the transport preheating section to the tensile testing section by the supply / recovery section, and then each in a constant temperature bath at a predetermined high temperature. A tensile test is performed for each test piece. Therefore, preheat a plurality of tensile test specimens for performing the required number of tensile tests together in a constant temperature bath so that the test piece inlet / outlet opening of the constant temperature bath does not open or close until the tensile test is completed the required number of times. It is possible to prevent high temperature air from leaking from the constant temperature bath and keep the constant temperature bath at a predetermined high temperature for a desired period. Therefore, the number of testable times per day can be increased. In addition, an air curtain is provided at the opening through which the tensile test specimen prepared outside the thermostat is carried into the transport preheating part by the carry-in part, so the air permeability between the outside and inside of the thermostat is maintained. Is blocked by air. Therefore, a further heat retaining effect can be expected. can do.

[Brief description of drawings]

FIG. 1 is a perspective view showing an overall image of a tensile test device according to the present invention.

FIG. 2 is a perspective view showing a flow from the time when the dumbbell-shaped test piece is supplied from the cassette magazine to the end of the test.

FIG. 3 is an enlarged perspective view showing a tensile test system.

FIG. 4 is an enlarged perspective view showing a sample supply system.

FIG. 5 is a diagram showing a relationship among a transfer preheating unit, a first transfer robot, a screw conveyor, and a second transfer robot.

FIG. 6 is a diagram showing a relationship between a marking line attaching system and a screw conveyor.

FIG. 7 is a diagram showing a relationship between a tensile test unit, a supply / recovery unit, and a transport preheating unit.

[Explanation of symbols]

 7 Tensile Test Specimen 10 Constant Temperature Tank 10a Specimen Entry / Exit Opening 18 Tensile Test Part 20 Supply / Recovery Part 22 Conveying Preheating Part 24 Chuck Part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kosaku Otani 5-7-6 Takinogawa, Kita-ku, Tokyo (72) Yoji Tanaka 5-7-6 Takinogawa, Kita-ku, Tokyo

Claims (2)

[Claims] 1. A tensile test part for gripping and pulling a test piece for tensile test with a chuck part, and a supply recovery for supplying the test piece to the chuck part of the tensile test part and recovering the tested test piece. Section, a transport preheating section that transports the test piece toward the supply / recovery section and preheats a plurality of the test pieces in the middle of the transport, and a tensile test section, a supply / recovery section, and a transport preheat section are arranged inside. Tensile tester having a constant temperature bath. 2. A test piece loading / unloading opening for loading the tensile test piece from the outside of the thermostat into the thermostat, and an air curtain is provided at the test piece loading / unloading opening. The tensile test apparatus according to claim 1.