JPH0320741Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention relates to a measuring machine for measuring loads.

(B) Prior Art For example, when measuring the load applied to a test piece in a material testing machine, a measuring machine that transmits the load to a load detection mechanism via a knife edge of a lever is generally used. Usually, the load detection mechanism has a scale plate and a load pointer, and the pointer is displaced along the scale of the scale plate. Therefore, the load on the test piece can be read and measured using the scale of the scale plate and the load pointer.

However, in this type of measuring machine, when measuring the load in two types of units, for example, Kgf units and N units, it has conventionally been necessary to attach two types of scales to the scale plate of the load detection mechanism. For this reason, there was a problem that the load was difficult to read and difficult to measure.

(c) Purpose Therefore, this invention provides the load detection mechanism with a scale plate and a load pointer, transmits the load to the load detection mechanism via the knife edge of the lever, and calculates the load by the scale of the scale plate and the load pointer. This was done with the aim of solving the above-mentioned conventional problems and making it easier to measure loads in a measuring machine designed to measure loads.

(d) Configuration This invention provides two or more types of knife edges on the lever of a measuring machine to measure loads in two or more types of units. The lever is guided so as to be rotatable about its longitudinal axis, and knife edges of each unit are formed at angular intervals around the lever's longitudinal axis, and the fulcrum of the knife edge is set at the fulcrum of the lever. It is characterized by a switching knob connected to the lever, which is provided at a predetermined angular position around the longitudinal axis, and switches the knife edge of each unit by rotating the lever.

(E) Embodiments Hereinafter, embodiments of this invention will be explained with reference to the drawings.

The drawing shows the use of this invention in a measuring machine for a material testing machine that applies a load to a test piece. The load applied to the test piece is transmitted by the measuring cylinder 1 to the upper lever 2, and by the connecting plate 3 to the lower lever 4.
transmitted to. The lower lever 4 has two types of knife edges 5, 6, which contact the fulcrum 7 thereof. The load is transmitted to the connecting rod 8 via the knife edges 5, 6 of the lever 4, and then to the load detection mechanism 9.

The load detection mechanism 9 has a scale plate 10 and a load pointer 11, and the load is measured by the scale 12 of the scale plate 10 and the load pointer 11. The scale plate 10 has one type of scale 12. Then, the scale 12 of the scale plate 10
A window 13 is provided along which the unit of measurement of the load is displayed. This detection mechanism 9 is designed to balance the load and the weight 15 of the balance beam 14.
The weight 15 is connected to a pulley 17 by a wire 16. The balance beam 14 is connected to a connecting rod 8 and connected to a displacement detector 18 .
is connected to the servo amplifier 19. Pulley 1
7 is connected to a servo motor 20, and the servo motor 20 is connected to a servo amplifier 19 and a tacho generator 2.
Connected to 1. The servo motor 20 operates in response to a signal from the servo amplifier 19, and the pulley 17
make a rotational movement. Then, the weight 15 of the balance beam 14 is moved so that the load on the connecting rod 8 and the weight 15 of the balance beam 14 are balanced. Also, pulley 1
7 rotates, the load pointer 11 moves to the scale plate 10.
displacement along the scale 12. Therefore, the load can be read and measured using the scale 12 and pointer 11.

This measuring machine has a knife edge 5 of the lower lever 4,
6 can be switched, and the load can be measured in Kgf units and N units. One type of knife edge 5 is for measuring the load in Kgf, and the other type of knife edge 6 is for measuring the load in N. The lever 4 is rotatably guided around its longitudinal axis and is rotatably connected to the connecting plate 3 and the connecting rod 8 . Further, knife edges 5 and 6 of each unit are formed at angular intervals around the longitudinal axis of the lever 4, and the fulcrum 7 thereof is provided at a predetermined angular position around the longitudinal axis of the lever 4. It is being In the embodiment shown, the knife edges 5, 6 of each unit are formed at an angular spacing of 180° around the longitudinal axis of the lever 4;
A knife edge 5 in Kgf units is formed on the upper part of the lever 4, and a knife edge 6 in N units is formed in the lower part of the lever 4. The fulcrum 7 is at the angular position corresponding to the knife edge 5 in Kgf, that is, the lever 4
It is located above the . Therefore, the knife edge 5 in units of Kgf can be brought into contact with its fulcrum 7. Further, a switching knob 22 is connected to the lever 4, and the switching knob 22 allows the lever 4 to
can be rotated, and the lever 4 can be rotated by 180 degrees around its longitudinal axis, so that the knife edges 6 of N units can be brought into contact with their fulcrums 7, whereby the knife edges of each unit can be rotated. 5,6
can be switched. Further, the load detection mechanism 9 is provided with a mechanism for switching the measurement unit of the window 13, and the switching knob 22 is connected to the switching mechanism.

In the measuring machine configured as described above, by rotating the lever 4 using the switching knob 22, the knife edges 5 and 6 in Kgf units and N units can be arbitrarily switched, and the knife edges 5 and 6 can be brought into contact with the fulcrum 7. can. Therefore, the load can be measured in Kgf and N units.

For example, by rotating the lever 4 using the switching knob 22, the knife edge 5 in Kgf is set at the fulcrum 7.
, a load is transmitted to the detection mechanism 9 with a lever ratio determined by the knife edge 5 in Kgf. At the same time, the switching knob 22
The display of the measurement unit in the window 13 of the detection mechanism 9 is switched by . Therefore, the load can be measured in kgf. On the other hand, when the lever 4 is rotated and N units of knife edges 6 are brought into contact with the fulcrum 7, the load is transmitted to the detection mechanism 9 at a lever ratio determined by the N units of knife edges 6. At the same time, the display of the measurement unit on the window 13 of the detection mechanism 9 is switched, and the load is measured in N units.

Therefore, in this measuring machine, only one type of scale 12 needs to be provided on the scale plate 10 of the detection mechanism 9, and there is no need to provide two types of scales as in the prior art. 1
The load can be measured in Kgf units and N units using only the different scales 12. Therefore, the load can be easily read and measured.

In this embodiment, a case has been described in which the load is measured in two types of units, but if the lever 4 is provided with three types of knife edges, the load can also be measured in three types of units. It is also possible to measure the load in larger units.

(f) Effects As explained above, this invention allows load to be measured in two or more types of units. In addition, when reading the load using the scale on the scale plate and the load pointer, it is only necessary to attach one type of scale to the scale plate, and two types of scales are required.
There is no need to add more scales than types. Therefore,
The load can be easily measured and the intended purpose can be achieved. Furthermore, this idea
Since the knife edge of each unit is switched by rotating the lever, the knife edge can be easily switched with one touch.

[Brief explanation of the drawing]

The drawing is an explanatory view showing one embodiment of this invention. 4...Lever, 5,6...Knife edge, 9...
Load detection mechanism.

Claims (1)

[Scope of utility model registration request] A scale plate and a load pointer are provided in the load detection mechanism, the load is transmitted to the load detection mechanism via a knife edge of a lever, and the load is measured by the scale of the scale plate and the load pointer. In the machine, the lever is provided with two or more types of knife edges for measuring the load in two or more types of units, the lever is guided so as to be rotatable around its longitudinal axis, and each of the units is knife edges are formed at angular intervals around the longitudinal axis of the lever, fulcrums of the knife edges are provided at predetermined angular positions around the longitudinal axis of the lever, and rotational operation of the lever is performed. A measuring machine characterized in that a switching knob for switching the knife edge of each unit is connected to the lever.