JPH0347696B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a material testing machine that holds a test material at both ends and applies a test load to one end thereof.

(B) Prior art In the material testing machine having the above structure, the main body frame of the testing machine generally consists of a pair of pillars of a predetermined length and a pair of cross bars installed at one end and the other end of these pillars. The test material is held between the pair of cross bars, and an actuator is provided on one of the pair of cross bars to apply a test load to the test material. This type of material testing machine normally has a main body frame with the support perpendicular to the installation floor, but since the test material is in a vertical position, the weight of the test material and the test material are This is advantageous because it allows accurate testing in relation to the directionality of the load and saves installation space, but it may be difficult to use when the test material is large or when testing in a corrosion tank. In such a case, it is necessary to lay down the main body frame so that the support is horizontal with respect to the installation floor. However, in conventional material testing of this type, two types of tests were performed: one is a so-called vertical type in which the main body frame is completely fixedly installed vertically to the installation floor, and the other is a vertical type in which the main body frame is laid down horizontally to the installation floor. It is specified as either a so-called horizontal type, which is installed completely fixedly, and can be shared by selectively changing the posture between a vertical position with the main body frame upright and a horizontal position with the main body frame upright. There was no such thing, and therefore the range of tests that could be carried out individually was narrowly limited, making it inconvenient and uneconomical.

(c) Purpose In view of the above-mentioned circumstances, it is an object of the present invention to enable a single testing machine to be used in common by selectively changing its posture between a vertical state with its body frame upright and a horizontal state where it lies down. It is.

(D) Configuration The material testing machine of the present invention has its main body frame supported at the middle part of the support by a horizontal support shaft in a direction that intersects the support, and by supporting the base frame installed on the floor. The main body frame is configured to be able to be rotated about the spindle to bring it into a state where it stands vertically with respect to the floor surface and a state where it lies down horizontally, and when the main body frame is erected vertically. A hydraulic cylinder is connected to one end of the frame in the longitudinal direction for selectively bringing the frame into a horizontally laid down state and a horizontally laid down state.

According to the material testing machine with this configuration, the main body frame can be used by selectively changing its posture between a vertical state standing perpendicular to the floor and a horizontal state lying horizontally, and the posture change is performed by a hydraulic cylinder. It can be done safely.

(e) Embodiments Examples of the present invention will be described with reference to the drawings.
In the material testing machine shown in the figure, a main body frame 1 of the testing machine includes a pair of pillars 2, 2' having a predetermined length extending parallel to each other at a predetermined interval, and one end side and the other end of these pillars 2, 2'. It is composed of a pair of mutually parallel cross bars 3, 3' installed on both sides. One of the pair of crossbars 3 is provided with a load cell 4, and the other 3' is provided with a load cell 4.
A flange 6 is provided through a rod 5 whose protrusion length can be adjusted toward the front. As a result, both ends of the test material (not shown) are fixedly supported by the load cell 4 and the flange 6, and in this way, the test material is held between the crossbars 3 and 3'. ing. Then, to one cross bar 3 on the side where the load cell 4 is provided, a pulling force, a pushing force, or a rotating force in the axial direction is applied to the load cell 4,
An actuator 7 consisting of a hydraulic cylinder or the like that applies a test load such as a tensile load, a compressive load, or a torsional load to the held test material is provided.

Such a main body frame 1 is supported by pedestal-like base frames 9, 9' fixedly installed on a floor surface 8. The support intersects both columns 2, 2' at right angles to the floor surface at a portion slightly offset to one of the crossbars 3' on the side where the flange 6 is provided in the middle of both columns 2, 2'. It is made up of horizontal support shafts 10, 10' parallel to 8. This results in
The main body frame 1 is rotatable about support shafts 10, 10' with respect to base frames 9, 9',
In this rotation, one of the crossbars 3 on the side where the actuator 7 is provided is placed on the upper side, and the other crossbar 3' is placed on the lower side, so that the columns 2, 2' are erected perpendicularly to the floor surface 8. The vertical state shown in solid lines in FIGS. 1 and 2, and the horizontal state shown in phantom lines in FIGS. It is possible to change the posture by 90 degrees around the supporting shafts 10, 10' which are selectively provided to the two. Here, when the main body frame 1 is in a vertical state, the main body frame 1 is connected to the base frames 9, 9' by an appropriate part such as the lower cross bar 3'. They are fixedly connected and fixed in that state by fixed connecting means consisting of fasteners such as bolts 11, 11' and pins. In addition, when the main body frame 1 is in a horizontal state where it is laid down horizontally, the main body frame 1 is placed on the floor at the cross bar 3 on the side where the actuator 7 is installed, which is the side that is laid down from top to bottom. cradle 1 installed on surface 8
2, and the pedestal 12 and the supporting portion are fixedly connected by fixed connecting means consisting of fasteners such as ports and pins in the same manner as above, and the load of the main body frame 1 is supported in this state. It is designed to be stably fixed.

A hydraulic cylinder 13 is connected to the main body frame 1 as an actuating means for selectively bringing it into the above-mentioned vertical state and horizontal state lying horizontally. In this case, the hydraulic cylinder 13 is attached to the base frame 99' on the side where the body frame 1 is laid down from the vertical state to the horizontal state, that is, on the side facing the pedestal 12.
The hydraulic cylinder 13 is inserted into a pit 14 of the required depth and length that has been dug from the bottom of the pit 14, and one end of the hydraulic cylinder 13 is rotatably connected to the end of the inner bottom of the pit 14 with a pin 15. The other end of the cylinder 13 can be freely rotated with a pin 16 at one end in the longitudinal direction which is the lower side when the main body frame 1 is in the vertical state, and therefore near the cross bar 3' on the side where the flange 6 is provided. It is made to be connected to. As a result, the main body frame 1 is erected when the hydraulic cylinder 13 is contracted, and the main frame 1 is lowered when the hydraulic cylinder 13 is extended. It is ensured that it does not interfere with the test work.

Furthermore, for the hydraulic cylinder 13, an operating manifold 1 is connected to one end and the other end thereof, as shown in the hydraulic circuit block diagram of FIG.
7, the pressure oil on-off valve 18 and the relief valve 19
Flow rate adjustment valves 21 and 2 through the switching valve 20, respectively.
1'. As a result, by switching the switching valve 20, the feeding direction of the pressure oil is selected, and the operating direction of the cylinder 13 is controlled to extend and contract when the main body frame 1 is erected or lowered. The speed is controlled by the flow rate adjustment valve 2 for both the case and the case of lodging.
This can be done by the opening degree adjustment operation of 1 and 21'.

According to the above material testing machine, the main body frame 1 is moved to the floor surface 8 by selectively connecting and releasing the fixed connecting means of the main body frame 1 to the base frames 9, 9' or the fixed connecting means to the pedestal 12.
It can be selectively changed into a vertical position (standing vertically) or a horizontal position (laying down horizontally), and can be used stably and safely in either of these positions.
The posture change from standing up to lying down can be automatically and safely performed at any appropriate speed by the hydraulic cylinder 13.

(f) Effects As described above, according to the present invention, one testing machine can change the posture of the main body frame between a vertical state in which it stands perpendicular to the floor and a horizontal state in which it lies horizontally. This posture change can be safely performed using a hydraulic cylinder, and each test method can be used in a posture suitable for the test method, which has a wide range of applications and is rational, convenient, and economical.

[Brief explanation of drawings]

Fig. 1 is a side view showing an embodiment of the material testing machine of the present invention, Fig. 2 is a front view with the main body frame upright, Fig. 3 is a plan view with the main body frame laid down, and Fig. 4 is a side view showing an embodiment of the material testing machine of the present invention. The figure is a block diagram showing an embodiment of the hydraulic circuit for the hydraulic cylinder of the material testing machine. 1... Main frame, 2, 2'... Support column, 3, 3'...
Crossbar, 7...actuator, 8...floor surface,
9, 9'... Base frame, 10, 10'... Support shaft,
12... pedestal, 13... hydraulic cylinder, 14... pit, 15, 16... pin, 17... operation manifold, 20... switching valve, 21, 21'... flow rate adjustment valve.

Claims (1)

[Scope of Claims] 1. A main body frame of the testing machine is constituted by a pair of columns having a predetermined length and a pair of cross bars installed on one end side and the other end side of these columns, and the pair of cross bars A material testing machine is provided with an actuator that holds a test material between the two crossbars and applies a test load to the test material on one of the pair of cross bars. By supporting a base frame installed on the floor by horizontal support shafts in the cross direction, the main body frame can be rotated around the support shafts to stand vertically and horizontally to the floor. a hydraulic cylinder for selectively bringing the main body frame into the vertically upright state and the horizontally lying state; A material testing machine characterized by being connected to one end in the longitudinal direction.