JP2007040799A - Creep testing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a creep testing device capable of preventing a plurality of weights from dropping scatteredly even when the weights drop by breakage of a test piece, and free from the risk of damaging equipment in the periphery thereof. <P>SOLUTION: This creep testing device has a weight receiving table 47 suspended with a weight 13 comprising the plurality of weights 12 layered on a mounting plate 36 is suspended in one side, using a lever arm mechanism 29 attached with a grasping tool 32 for grasping the test piece 22 in the other side, provided with an opening part 36a inserted with the mounting plate 36 in the central part, capable of mounting the weights 12 larger than an outside diameter g of the mounting plate 36, and for conducting ON-OFF of a suspension condition of the weight 13 by going-up and -down, and a scattering preventive fence 48 mounted on the weight receiving table 47, and provided with a plurality of the first vertical members 98 for surrounding an outer circumference of the suspended weights 12 and arranged with a space Q, the weight receiving table 47 is supported by the second vertical members 68-85 inserted between the space Q of the first vertical members 98, and the scattering preventive fence 48 is formed into laterally or longitudinally two-divided structure to carry in and out the weights 12. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a creep test apparatus used for measuring creep rupture strength or creep characteristics of a test piece such as a metal material at a high temperature.

The creep test equipment, for example, has a cylindrical high-temperature furnace that holds a metal material test piece at a predetermined temperature, a weight having a predetermined weight attached to one side, and a metal material test piece in the high-temperature furnace held on the other side. And a lever arm provided with a gripping tool for applying a static tensile load by a weight to a metal material test piece in a high temperature furnace. And when the metal material test piece breaks, the weight falls on the weight cradle, but the structure of the weight cradle is excellent in vibration control to ensure the test accuracy due to shock and vibration at the time of dropping. It is a composite of damping steel plate and rubber. In addition, the weight has a structure in which a plurality of (for example, 10 to 20) weights are stacked so that the weight can be adjusted to a predetermined tensile weight (see, for example, Patent Document 1).

JP-A-9-126973 (FIG. 1)

However, the conventional creep test apparatus still has the following problems to be solved.
When the static tensile load of the creep test apparatus is large (for example, the maximum test load is 30 tons), the distance between the weight and the weight cradle becomes long (for example, 400 to 800 mm), and thus the metal material When the test piece was broken, a plurality of weights were scattered and dropped, which was a safety problem, and there was a risk of damaging peripheral equipment.

The present invention has been made in view of such circumstances, and even if the weight falls due to the breakage of the test piece, a plurality of weights do not fall and fall, and there is no risk of damaging peripheral equipment. An object is to provide a creep test apparatus.

The creep test apparatus according to the present invention that meets the above-described object is provided with a lever arm mechanism that can suspend a weight consisting of a plurality of weights stacked on a mounting plate on one side and a gripping tool that holds a test piece on the other side. A vertical load type creep test apparatus that applies a static tensile load obtained by amplifying the weight of the weight to the test piece, and has an opening through which the mounting plate can be inserted in the center; A plurality of weights that can be mounted with the plurality of weights larger than the outer diameter of the plate and that are raised and lowered by lifting means to turn the weights in a suspended state, and a plurality of weights mounted on the weights table And an anti-scattering fence provided with a plurality of first vertical members arranged around the outer circumference of the suspended weight and having a gap, respectively, and the weight cradle includes the plurality of first Supported by a plurality of second vertical members that pass through the gaps of the vertical members. And the anti-scatter fences are possible loading and unloading of the weight becomes horizontally or a bisected structure before and after.

In the creep test apparatus according to the present invention, it is preferable that the scattering prevention fence is opened and closed in a direction orthogonal to the load transmission direction of the lever arm mechanism.
In the creep test apparatus according to the present invention, a buffer member may be provided on an upper portion of the weight cradle.

In the creep test apparatus according to the present invention, a detecting means for measuring the distance between the upper end of the weight cradle and the lower end of the weight is provided, a servo motor is provided in the lifting means, and the measurement is performed by the detecting means. The weight cradle may be arranged with a slight gap immediately below the lower end of the weight.
In the creep test apparatus according to the present invention, the scattering prevention fence, the weight cradle, and a part of the elevating means may be arranged in a double-folded storage case.

The creep test apparatus according to any one of claims 1 to 5 is provided with an opening through which the mounting plate can be inserted in the center, and can mount a plurality of weights larger than the outer diameter of the mounting plate, and is lifted and lowered by a lifting means. A weight cradle for turning on and off the weight in a suspended state, and a plurality of first verticals arranged around the outer circumferences of the weights on the weight cradle and the weights suspended, respectively, and having a gap therebetween An anti-scattering fence provided with a member, the weight pedestal is supported by a plurality of second vertical members that pass through the gaps of the plurality of first vertical members, and the anti-scattering fence is provided on the left and right or front and rear Since the weight can be taken in and out in a two-part structure, even if the weight falls due to the breakage of the test piece during the test, multiple weights will not be scattered and fall, and peripheral equipment There is no risk of damage.

In particular, in the creep test apparatus according to the second aspect, since the anti-scattering fence opens and closes in a direction orthogonal to the load transmission direction of the lever arm mechanism, the apparatus can be configured compactly.
In the creep test apparatus according to claim 3, since the upper part of the weight cradle has a buffer member, it is possible to reduce the impact when the weight is dropped, prevent damage to the apparatus, and measure. High accuracy can be maintained.

According to a fourth aspect of the present invention, the creep test apparatus is provided with detection means for measuring the distance between the upper end of the weight cradle and the lower end of the weight, and a servo motor is provided in the lifting means, and the weight of the weight measured by the detection means is measured. Since the weight cradle is arranged with a slight gap just below the lower end, the weight fall distance can be kept small, which can reduce the impact when the weight falls and damage the device. In addition, the measurement accuracy can be maintained high.
In the creep test apparatus according to claim 5, since a part of the anti-scattering fence, the weight cradle and the lifting means are arranged in the double door type storage case, in the unlikely event that the weight is dropped, It is safe even if the scattering prevention fence, the weight cradle, the lifting means, etc. are damaged and the fragments come out of the fence member.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
Here, FIG. 1 is a partially cutaway front view of a creep test apparatus according to an embodiment of the present invention, FIG. 2 is a left side view of the creep test apparatus, and FIG. 3 is a partially cutout of the creep test apparatus. FIG. 4 is a partially cutaway front view of the main part of the creep test apparatus, FIG. 5 is an arrow AA view of FIG. 4, FIG. 6 is an arrow BB view of FIG. 5 is a detailed explanatory view of the weight cradle, and FIG. 9 is an enlarged view of a part a in FIG.

As shown in FIGS. 1 to 4, the creep test apparatus 10 according to an embodiment of the present invention is capable of suspending a weight 13 on one side (input side) and an example of a test piece on the other side (output side). A static tensile load W obtained by amplifying the load of the weight 13 is applied to the test piece 22 by using a lever arm mechanism 29 to which a gripping tool 32 for holding a metal material test piece 22 (hereinafter simply referred to as a test piece) is attached. This is a vertical load type testing device to be applied. The load transmission direction of the lever arm mechanism 29, that is, the direction of the straight line connecting the center line of the weight 13 and the axis of the gripping tool 32 of the test piece 22 is the left-right direction, and the direction orthogonal thereto is the front-rear direction. This will be described in detail below.

As shown in FIGS. 1 to 3, the creep test apparatus 10 is fixed to a floor surface (FL), and has a fixed base 17 whose outer shape is formed in a rectangular parallelepiped shape by a shape steel, a steel plate, or the like, and one side of the fixed base 17. (Suspension side of the weight 13) A storage case 21 that is placed and fixed on the upper surface and has a space in which the weight 13 can move up and down is formed in a rectangular parallelepiped shape, and the other side of the fixed base 17 (test piece) 22 (on the gripping side) 22 in plan view, four columns 18 standing at the four corners of the upper surface of a rectangle (including a square), and fixed to the upper end of each column 18 by screw fastening, are arranged horizontally. And a rectangular plate-shaped mounting base 19. The upper portion of the storage case 21 is fixed by a fixing rod 20 provided horizontally at each of the intermediate portions in the vertical direction of the two columns 18 installed on the storage case 21 side.

At the center of the four support columns 18 erected on the upper part of the fixed base 17, a two-part vertical ring that is an example of a high temperature furnace capable of holding the test piece 22 at a predetermined temperature (for example, 400 to 1000 ° C.). A type electric furnace 11 is provided. A lower connection portion 22 a formed at the lower end portion of the test piece 22 protrudes from the lower end portion of the substantially sealed cylindrical electric furnace 11, and below the electric furnace 11 at the upper portion of the fixed mount 17. A screw jack 23 is provided at the position. The tip end portion of the screw shaft 24 of the screw jack 23 is connected to the lower connection portion 22 a of the test piece 22 via a connection fitting 25. A bellows 26 that extends and contracts over the screw shaft 24 is provided between the lower end of the connection fitting 25 and the fixed base 17. The screw jack 23 is driven via a chain 28 by a motor 27 with a speed reducer attached to the fixed mount 17.

An upper connection portion 22b formed at the upper end portion of the test piece 22 protrudes from the upper end portion of the electric furnace 11, and the upper connection portion 22b is provided to be slidable by a small distance in the axial direction of the electric furnace 11. Yes. A pair of low-height bearing brackets 30 are arranged on the mounting base 19 so as to face each other at an interval in the front-rear direction, and a two-stage lever arm mechanism is provided between the pair of bearing brackets 30. 29, the base portion of the auxiliary lever arm 16 constituting the first stage is disposed, and the auxiliary lever arm 16 in a substantially horizontal state can be slightly rotated around the rotation center P of the front portion of the bearing bracket 30. .

On the mounting base 19, a pair of bearing brackets 31, which are opposed to each other with a space in the front-rear direction and which have a high height, are arranged with the front side of the auxiliary lever arm 16 interposed therebetween, and the paired bearings On the upper side between the brackets 31, the base portion of the main lever arm 14 constituting the second stage of the lever arm mechanism 29 is disposed, and the main lever arm 14 in a substantially horizontal state is located at the rotation center O at the front portion of the bearing bracket 31. It can be rotated slightly around.

A gripping tool 32 having a known structure is rotatably mounted near the bearing bracket 30 of the auxiliary lever arm 16 (a position ahead of the rotation center P) with the lower side of the auxiliary lever arm 16 interposed therebetween. The upper end portion of the upper connection portion 22b is connected to the lower end portion of the gripping tool 32.
In the vicinity of the bearing bracket 31 of the main lever arm 14 (base position from the rotation center O), a gripping member 33 that forms a pair of known structures sandwiching the upper side of the auxiliary lever arm 16 and the lower side of the main lever arm 14. The auxiliary lever arm 16 is rotatably connected to the lower end portion of the gripping member 33.

A suspension rod 35 having a circular cross section is suspended from the distal end portion of the main lever arm 14 via a connection fitting 34, and a circular mounting plate 36 is horizontally fixed to the lower end portion of the suspension rod 35. (See FIG. 4). Here, when the horizontal distance between the rotation center O of the bearing bracket 31 and the gripping member 33 is L ₁₁ and the horizontal distance between the rotation center O of the bearing bracket 31 and the connection fitting 34 is L ₁₂ , the main lever arm 14 The lever ratio is L ₁₁ : L ₁₂ (1:20 in the present embodiment). On the other hand, the horizontal distance between the pivot center P of the bearing bracket 30 and the gripping tool 32 is L ₂₁ , and the pivot center P of the bearing bracket 30 is. and gripping the horizontal distance between the member 33 and L _22, the lever ratio of the auxiliary lever arm 16 is L _21: L ₂₂ (in the present embodiment 1: 5), and therefore, the lever ratio of the lever arm mechanism 29 is L ₁₁ × L ₂₁ : L ₁₂ × L ₂₂ (1: 100 in this embodiment). Therefore, in the present embodiment, in order to apply the static tensile load W to the test piece 22, the weight of the weight 13 is (W / 100).

In the present embodiment, for example, when the test piece 22 is extended by 1 mm, the weight 13 is lowered by about 100 mm. Further, in order to apply W = 30 tons to the test piece 22, the weight 13 has a weight of 300 kg, and the weight 13 is formed from a plurality of (15 in the present embodiment) weights 12 stacked on the mounting plate 36. Therefore, the weight of the weight 12 is 20 kg / piece.
As shown in FIGS. 1 and 4, when the weight 13 is suspended and the main lever arm 14 in the horizontal state rotates clockwise around the rotation center O of the bearing bracket 31, the attachment center of the connection fitting 34 is Moving from the position T to the lower position U on the electric furnace 11 side, the suspension rod 35 also moves to the electric furnace 11 side. The vertical distance between the position T and the position U is J (in this embodiment, J = 400 mm). Further, the horizontal distance between the position T and the position U is X (X = 40 mm in the present embodiment).

As shown in FIG. 1, a weight adjustment weight 37 that can move horizontally is attached to the base end of the main lever arm 14, and a disc-shaped pair of balances is attached to the tip of the auxiliary lever arm 16. A weight 38 is attached. With the weight adjusting weight 37 and the balance weight 38, the main lever arm 14 and the auxiliary lever arm 16 are held substantially horizontally when the test piece 22 and the weight 13 are not attached to the lever arm mechanism 29. ing.

As shown in FIG. 1, each of the two support columns 18 on the storage case 21 side is provided with a single fixed shaft 39 disposed vertically between the support column 18 and the electric furnace 11. It is attached via brackets 40 and 41. The electric furnace 11 is divided into two parts (vertically divided), and rotating brackets 42, 43 and 44, 45 are provided above and below the respective end portions of the divided parts on the storage case 21 side. Can be opened around the door.

As shown in FIGS. 4 to 9, the storage case 21 in which the weight 13 moves up and down is provided with an opening 36 a at the center through which the mounting plate 36 provided at the tip of the suspension rod 35 can be inserted, and A weight receiving base 47 on which a plurality of weights 12 larger than the outer diameter g of the mounting plate 36 can be mounted, and the weight 13 is raised and lowered by the elevating means 46 to turn the weight 13 in a suspended state, and the weight receiving base 47 A plurality of (in this embodiment, 20) first vertical members 98 surrounding the outer periphery of the weights 12 and the weights 12 suspended from the main lever arm 14 and having gaps Q respectively. And an anti-scattering fence 48 provided.

In addition, the weight receiving base 47 is supported by a plurality (18 in this embodiment) of the second vertical members 68 to 85 that are inserted through the gaps Q of the plurality of first vertical members 98, and the scattering prevention fence. Reference numeral 48 denotes a front and rear two-part structure that allows the weight 12 to be carried in and out. Hereinafter, these will be described in detail.

As shown in FIG. 4 to FIG. 6, horizontal members 49 to 51 made of channel material are provided horizontally at intervals in the vertical direction from the center to the bottom inside the side surface of the storage case 21 on the column 18 side. Yes. A rectangular plate-shaped vertical base 53 is screwed to the horizontal members 49 to 51 via six disk-shaped vibration-proof rubbers 52. On both sides of the vertical base 53, vertical rails 54 and 55 having a square cross section with a space are provided vertically. A ball screw shaft 56 is vertically disposed between the vertical rails 54 and 55, and an upper end portion and a lower side portion of the ball screw shaft 56 are rotatably supported by bearings 57 and 58, respectively.

A rectangular mounting plate 61 is arranged at a parallel interval to the vertical base 53, and a screw block 59 in which a female screw to which a male screw of the ball screw shaft 56 is screwed is formed on the vertical base 53 side of the mounting plate 61. Is mounted at the center in the front-rear direction, and a guide unit 60 that moves up and down in contact with the top surfaces of the vertical rails 54 and 55 is mounted at an interval in the vertical direction.
As shown in FIGS. 1 and 3 to 5, the lower end portion of the ball screw shaft 56 is connected to an output shaft of a servo motor 62 attached to the fixed mount 17 via a coupling 63. With this configuration, by driving the servo motor 62, the mounting plate 61 can be moved up and down along the vertical rails 54 and 55 by a stroke S (S = 400 mm in the present embodiment).

As shown in FIGS. 4, 6, and 8, rectangular contact plates are attached to both ends of the mounting plate 61 on the side of the weight 13 and are elongated in the vertical direction and fastened to the mounting plate 61 by screws. 64 and 65 and side plates 66 and 67 are provided on the inner surface of the contact plates 64 and 65 so as to be orthogonal to the contact plates 64 and 65 and to be opposed to each other. A predetermined gap G (G = 30 mm in the present embodiment) is opened on the inner side surface of the lever arm mechanism 29 in the load transmission direction, and the thickness is t (t = 6 mm in the present embodiment). Two vertical members 68-85 are provided.

The second vertical members 68 and 77, 69 and 78, 75 and 84, 76 and 85, which are arranged opposite to each other on both side positions, are screwed via a connecting plate 86 fixed to one of them. Yes. Here, the lifting means 46 includes the second vertical members 68 to 85, the connecting plate 86, the side plates 66 and 67, the contact plates 64 and 65, the mounting plate 61, the guide unit 60, the screw block 59, the bearings 57 and 58, A ball screw shaft 56, vertical rails 54 and 55, a vertical base 53, a coupling 63, and a servo motor 62 are included.

The two-dot chain line h shown in FIG. 8 represents the outer shape of the weight 12 when the main lever arm 14 is horizontal, while the two-dot chain line k represents the outer shape of the weight 12 when the main lever arm 14 is inclined. Yes.
A weight receiving base 47 formed in a ring shape having an elliptical shape and an elliptical opening 36 a in the center is provided on the tip side of the second vertical members 68 to 85 and the upper surface of the connecting plate 86. The fixed plate 47a is fixed to the upper surface of the fixed plate 47a and includes a buffer rubber 87 which is an example of a buffer member. The shape of the opening 36a of the weight receiving base 47 is such that the mounting plate 36 is arranged vertically. It is formed in a size that can be inserted.

Moreover, the second vertical members 68 to 85 and the connecting plate 86 to which the weight receiving base 47 is attached are also formed in a structure in which the mounting plate 36 can be inserted vertically. That is, the second vertical members 70 to 74 and 79 to 83 having a length N located on the central side, and the second vertical members 68, 69, 75, 76 and 77, 78 having a length M located on both sides, The tips of 84 and 85 (M> N) are located outside the opening 36a of the weight receiving base 47 in plan view.

As shown in FIGS. 4, 5, 7, and 9, the anti-scattering fence 48 is divided into two fence divided bodies 88 and 89 that are paired in a direction (front-rear direction) perpendicular to the load transmission direction of the lever arm mechanism 29. The pair of fence divisions 88 and 89 are configured to be movable in a direction orthogonal to the load transmission direction of the lever arm mechanism 29.

Horizontal members 90 and 91 made of an angle material are horizontally provided at the lower end of the storage case 21 with an interval therebetween. On the horizontal members 90, 91, a rectangular plate-shaped horizontal base 92 is screwed via four disk-shaped vibration-proof rubbers 52. On both sides of the horizontal base 92, horizontal rails 93 and 94 having a square cross section with a space are provided horizontally.

The fence divisions 88 and 89 are respectively provided with rectangular fixed bases 96 and 97 horizontally mounted with guide units 95 that are in contact with the horizontal rails 93 and 94 and move back and forth. Lower mounting plates 96a and 97a having the same size as the fixed bases 96 and 97 are screwed on the fixed bases 96 and 97, respectively, and are vertically disposed on the lower mounting plates 96a and 97a, respectively. A first vertical member 98 made up of a plurality of (in this embodiment, ten) rod-shaped plate members (thickness is 6 mm in this embodiment) is erected, and the upper end of the first vertical member 98 is The lower mounting plates 96a and 97a are fixed to the lower surfaces of rectangular upper mounting plates 99 and 100 that are horizontally provided facing the lower mounting plates 96a and 97a.

As shown in FIGS. 6 and 7, when the opposing end surfaces of the fixed bases 96 and 97 are in contact with each other and the opposing end surfaces of the upper mounting plates 99 and 100 are in contact, the fence divisions 88 and 89 are closed. The anti-scattering fence 48 is configured, and a total of 20 first vertical members 98 of the fence divisions 88 and 89 of the anti-scattering fence 48 are arranged in a substantially cylindrical shape in plan view.

As shown in FIGS. 4, 5, and 9, horizontal members 101 and 102 made of angle members are provided at the upper end of the storage case 21 with a parallel interval, and at the lower ends of the horizontal members 101 and 102. The guide members 103 and 104 made of an angle material are attached at a parallel interval. On the upper surfaces of the upper mounting plates 99 and 100, there are provided guide roller units 105a and 105 which are opposed to each other with a gap therebetween. The guide roller unit 105a is configured differently from the guide roller unit 105.

The guide roller unit 105 (105a is also the same) is screwed to the upper mounting plates 99 and 100, and has a substantially isosceles triangular shape when viewed from the front, and an L-shaped mounting bracket 106 when viewed from the side. A roller mounting plate 108 having a substantially inverted isosceles triangle shape when viewed from the front is rotatably connected to the top via a pin 107, and rotatably provided on both sides of the upper end of the roller mounting plate 108 via a fixed shaft 109. And a guide roller 110 with a flange that rolls in contact with the lower ends of the guide members 103 and 104.

With such a configuration, as shown in FIGS. 5 to 7, the 20 first vertical members 98 indicated by solid lines formed in a cylindrical shape in a state in which the fence divided bodies 88 and 89 are in contact (closed), Even if the weight 13 falls during the test, the weight 12 (outer diameter D) can be prevented from scattering, which is safe. At this time, the distance between the inner ends of the first vertical members 98 arranged in the innermost direction in the front-rear direction is d, and D> d. Further, before and after the test, the fence divided bodies 88 and 89 are moved in the front-rear direction around the suspension rod 35 and separated (opened) to thereby separate the two-dot chain lines of the fence divided bodies 88 and 89. A space for inserting and removing the weight 12 in the front-rear direction between the ten first vertical members 98, that is, the distance between the inner ends of the first vertical members 98 disposed in the innermost direction in the front-rear direction. K (K> D) can be secured.

As shown in FIG. 8, a reflection type photoelectric switch 112, which is an example of a detection means, is attached to the inside of the distal end portion of each of the second vertical members 70 and 74 via an attachment seat 111. By 112, the distance between the upper end of the weight receiving base 47 and the lower end of the weight 13 is measured. The electric wires 113 of the photoelectric switch 112 are attached along the inner sides of the support members 70 and 74, respectively.

With this configuration, the distance between the upper end of the weight receiving base 47 and the lower end of the weight 13 is measured by the photoelectric switch 112 during the test, and a small gap R (for example, this implementation is performed immediately below the lower end of the weight 13 that moves up and down. In this embodiment, R = 100 mm) is provided, and the weight support 47 is arranged, that is, the servo motor 62 is driven via a control device (not shown) so that the weight 13 can be followed. The weight support 47 is raised and lowered.

As shown in FIGS. 1 and 2, the test piece mounting jig 15 used for lifting the test piece 22 so that the upper connection portion 22 b of the test piece 22 is located at the lower end portion of the gripping tool 32 is provided in the storage case 21. The motor 114 provided on the two support columns 18 on the side via brackets (not shown), a speed reduction means (not shown) connected to the motor 114, and rotated by the speed reduction means, are spaced apart in the left-right direction. A pair of chain sprockets 115 arranged at an opening, a pair of chain sprockets 115 provided at the lower end of the mounting base 19 with a space in the left-right direction, and a pair of chain sprockets 115. , 116 and a pair of chains 118 having both ends connected to the specimen mounting jig 15 and the counterweight 117, respectively. Chromatography (in this embodiment Y = 3000 mm) click Y are configured to lift.

As shown in FIGS. 4 to 6, an elongated rectangular box-shaped mounting seat 119 is vertically provided on one side of the horizontal members 49 and 51 provided in the storage case 21. The limit switches 122 and 123 operated by the strikers 120 and 121 provided above and below the mounting plate 61 are provided at intervals. An L-shaped attachment bracket 124 is attached to the attachment plate 61, and a cable bear 125 is provided between the attachment bracket 124 and the horizontal member 49.

Reference numeral 126 in FIG. 2 indicates the inclination state of the main lever arm 14 and the auxiliary lever arm 16, and the screw shaft 24 (connecting bracket 25) of the screw jack 23 is moved up and down and the test piece mounting jig 15 is moved up and down. A display operation box for operation is shown. Reference numerals 127 and 128 in FIG. 3 represent acrylic viewing windows for viewing the condition of the weight 13 in the storage case 21. In addition, the side surface on the opposite side to the electric furnace 11 of the storage case 21 provided with the observation windows 127 and 128 is configured to be able to open the doors with the knob 129 in hand.

4, reference numeral 130 denotes a stopper for the lower limit position of the mounting plate 61, and reference numerals 131 and 132 in FIG. 5 denote opening limits of the fence divided bodies 88 and 89 provided at both ends of the horizontal rails 93 and 94, respectively. Represents a position stopper. Further, reference numeral 133 in FIG. 1 represents a mounting frame in which three photoelectric switches (not shown) for detecting the upper limit, center and lower limit positions of the main lever arm 14 are provided at intervals in the vertical direction. Yes. For example, when the test piece 22 is extended and the main lever arm 14 is at the lower limit position, the screw jack 23 is operated and the screw shaft 24 is lowered so that the main lever arm 14 is in the center position. .

Next, the usage method and operation of the creep test apparatus 10 according to one embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the servo motor 62 is driven to place the weight receiving base 47 at a substantially central position in the vertical direction. In this state, the main lever arm 14 is in a substantially horizontal state, and the mounting plate 36 is located below the weight receiving base 47.

With the electric furnace 11 open, the motor 114 is driven to lower the test piece mounting jig 15 by the stroke Y, the upper connection portion 22b of the test piece 22 is attached to the test piece mounting jig 15, and then the motor 114 is moved. The test piece mounting jig 15 is raised by driving, and the center position in the height direction of the test piece 22 is moved to the center position in the height direction of the electric furnace 11.
After driving the motor 27 and raising the screw shaft 24 of the screw jack 23 to connect the lower connection portion 22a of the test piece 22 and the coupling fitting 25, the upper connection portion 22b of the test piece 22 is attached to the gripping tool 32. Connect to the lower end. Thereafter, the electric furnace 11 is closed.

The side of the storage case 21 shown in FIG. 3 is opened manually, and as shown in FIG. 5, the fence divisions 88 and 89 of the anti-scattering fence 48 are opened manually in the front-rear direction and placed on the weight support 47. After the 15 weights 12 are stacked to form the weight 13, the fence divided bodies 88 and 89 are closed manually in the front-rear direction, and by the 20 first vertical members 98 arranged in a cylindrical shape, The outer periphery of the weight 13 is surrounded.

By heating the interior of the electric furnace 11 to a predetermined temperature and stabilizing it at that temperature, the servo motor 62 is driven to lower the weight receiving base 47 and relatively raise the mounting plate 36. By placing the weight 13 on the placement plate 36, the weight 13 is suspended from the lever arm mechanism 29, and the test piece is passed through the main lever arm 14, the gripping member 33, the auxiliary lever arm 16, and the gripping tool 32. A static tensile load W is applied to 22 and a creep test is performed.
During the test, when the test piece 22 is extended and the weight 13 is lowered by a predetermined amount (for example, 100 mm) via the main lever arm 14 and the auxiliary lever arm 16 or the like, a photoelectric switch (not shown) attached to the attachment frame 133 is shown. And the motor 27 is driven to lower the screw shaft 24 of the screw jack 23 so that the main lever arm 14 is horizontal.

Next, the servo motor 62 is operated so that the gap R between the lower end position of the weight 13 and the upper end position of the weight receiving base 47 that are raised by the lowering of the screw shaft 24 of the screw jack 23 is maintained constant. The cradle 47 is automatically raised.
As described above, each time the test piece 22 is extended and the weight 13 is lowered by a predetermined amount, the motor 27 is driven so that the main lever arm 14 becomes horizontal. The servo motor 62 is controlled so as to follow 13.

During the test, even if the test piece 22 breaks and the weight 13 held by the lever arm mechanism 29 falls, the gap R between the lower end position of the weight 13 and the upper end position of the weight receiving base 47 is small. The impact on the weight cradle 47 can be kept small. Further, since the cushion rubber 87 is provided on the upper part of the weight receiving base 47, the impact force can be reduced. Further, since the circumference of the weight 13 is covered by the 20 first vertical members 98 arranged in a cylindrical shape of the scattering prevention fence 48, the first vertical member in which the weight 12 is formed in a cylindrical shape. There is no fear of going outside the 98, and it is safe.

The present invention is not limited to the above-described embodiments, and can be changed without departing from the gist of the present invention. For example, some or all of the above-described embodiments and modifications are included. A combination of the creep test apparatus of the present invention is also included in the scope of the present invention.
In the present embodiment, the test piece 22 is made of a metal material. However, the present invention is not limited to this, and a material such as plastic can also be used if necessary.

Although the anti-scattering fence 48 has a front and rear divided structure, the invention is not limited to this, and it can be divided into a left and right divided structure as necessary.
Although the number of the test pieces 22 is one, it is not limited to this, and may be two or more as necessary. In this case, both end portions of the plurality of test pieces are connected to the lever arm mechanism and the screw jack using the connection fitting.
The lever arm mechanism 29 is a two-stage type including the main lever arm 14 and the auxiliary lever arm 16, but is not limited to this, and a one-stage type or a three-stage or more lever arm mechanism is used as necessary. You can also.

Although the cushioning rubber 87 is provided on the upper part of the weight receiving base 47 as a cushioning member, the cushioning rubber 87 is not limited to this, and the cushioning rubber can be omitted if necessary, and other cushioning members are used. You can also.
A detecting means for measuring the distance between the upper end of the weight receiving base 47 and the lower end of the weight 13 is provided, and a servo motor 62 is provided in the elevating means 46 so that it is slightly below the lower end of the weight 13 measured by the detecting means. However, the present invention is not limited to this, and the detection means can be omitted and the servo motor can be a normal motor if necessary.

The scattering prevention fence 48, the weight receiving base 47, and a part of the lifting and lowering means 46 are arranged in the double-spread type storage case 21, but the present invention is not limited to this, and the storage case can be omitted depending on the situation.
Although the first vertical member 98 is formed of a plate material, the present invention is not limited to this, and a bar material can be used as necessary.

It is a partially notched front view of the creep test apparatus which concerns on one embodiment of this invention. It is a left view of the creep test apparatus. It is a partially cutaway right view of the creep test apparatus. It is a principal part partial notch front view of the creep test apparatus. It is arrow AA figure of FIG. It is an arrow BB figure of FIG. FIG. 6 is an arrow CC view of FIG. 5. It is detailed explanatory drawing of a weight receiving stand. It is an enlarged view of the a part of FIG.

Explanation of symbols

10: Creep test apparatus, 11: Electric furnace (high temperature furnace), 12: Weight, 13: Weight, 14: Main lever arm, 15: Test piece mounting jig, 16: Auxiliary lever arm, 17: Fixed mount, 18 : Support column, 19: mounting base, 20: fixing rod, 21: storage case, 22: metal material test piece (test piece), 22a: lower connection part, 22b: upper connection part, 23: screw jack, 24: screw Shaft, 25: connecting bracket, 26: bellows, 27: motor, 28: chain, 29: lever arm mechanism, 30: bearing bracket, 31: bearing bracket, 32: gripping tool, 33: gripping member, 34: connecting bracket, 35: suspension rod, 36: mounting plate, 36a: opening, 37: weight for weight adjustment, 38: balance weight, 39: fixed shaft, 40, 41: mounting bracket, 42 to 45: rotating bracket , 46: lifting means, 47: weight receiving base, 47a: fixed plate, 48: anti-scattering fence, 49-51: horizontal member, 52: anti-vibration rubber, 53: vertical base, 54, 55: vertical rail, 56 : Ball screw shaft, 57, 58: Bearing, 59: Screw block, 60: Guide unit, 61: Mounting plate, 62: Servo motor, 63: Coupling, 64, 65: Contact plate, 66, 67: Side plate 68 to 85: second vertical member, 86: connecting plate, 87: shock absorbing rubber (buffer member), 88, 89: fence divided body, 90, 91: horizontal member, 92: horizontal base, 93, 94: horizontal rail , 95: Guide unit, 96, 97: Fixed base, 96a, 97a: Lower mounting plate, 98: First vertical member, 99, 100: Upper mounting plate, 101, 102: Horizontal member, 103, 104: Guide Member, 105, 1 5a: guide roller unit, 106: mounting bracket, 107: pin, 108: roller mounting plate, 109: fixed shaft, 110: guide roller with hook, 111: mounting seat, 112: photoelectric switch (detection means), 113: electric wire , 114: motor, 115, 116: chain sprocket, 117: counterweight, 118: chain, 119: mounting seat, 120, 121: striker, 122, 123: limit switch, 124: mounting bracket, 125: cable bear, 126 : Display operation box, 127, 128: Viewing window, 129: Knob, 130: Stopper, 131, 132: Stopper, 133: Mounting frame

Claims (5)

A weight consisting of multiple weights stacked on the mounting plate can be suspended on one side, and a lever arm mechanism with a gripping tool that holds the test piece on the other side is used to amplify the weight load on the test piece. In a vertical load type creep test device that applies a static tensile load,
An opening through which the mounting plate can be inserted is provided in the center, and the plurality of weights larger than the outer diameter of the mounting plate can be mounted, and the weight is suspended by lifting and lowering the weight. A weight cradle, and
A plurality of weights mounted on the weight cradle and an anti-scattering fence provided with a plurality of first vertical members disposed around the outer periphery of the suspended weights, each having a gap;
The weight pedestal is supported by a plurality of second vertical members that pass through the gaps of the plurality of first vertical members, and the anti-scattering fence is divided into left and right or front and rear divided structures, and the weight A creep test apparatus that can be carried in and out. The creep test apparatus according to claim 1, wherein the anti-scattering fence opens and closes in a direction orthogonal to a load transmission direction of the lever arm mechanism. 3. The creep test apparatus according to claim 1, further comprising a buffer member on an upper portion of the weight receiving base. 4. The creep test apparatus according to any one of claims 1 to 3, wherein a detection means for measuring a distance between an upper end of the weight cradle and a lower end of the weight is provided, and a servo motor is provided in the lifting means. A creep test apparatus, characterized in that the weight cradle is arranged with a slight gap immediately below the lower end of the weight measured by the detection means. 5. The creep test apparatus according to claim 1, wherein a part of the anti-scattering fence, the weight cradle, and the elevating means are arranged in a double-spread type storage case. Creep test equipment.

Images