JPH0632593Y2 - Load detector - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a load detection device most suitable for use in a strength test of an automobile body.

[Conventional technique and its problems] In a strength test of an automobile body, it is necessary that the applied load amount is accurately detected. As a load detection device used in this type of test, for example, There is a structure principle as shown in FIG.

That is, the load detection device as the conventional proposal is composed of the load load plate 1 and the detector 2, and when a load F from an appropriate actuator (not shown) is applied to the load load plate 1, the load is applied to the load load plate 1. It is assumed that the load value, that is, the numerical value is detected by the detector 2 arranged between the load plate 1 and the fixed side A.

Therefore, as shown in the figure, for example, when carrying out a load bearing strength test of a roof corner portion B1 of a body B of an automobile, the load loading plate 1 is brought into contact with the roof corner portion B1 and the load loading plate 1 is brought into contact with the roof corner portion B1. When the load F is applied from the contact state of No. 2, the value is detected by the detector 2.

The vehicle body B is, of course, supported on the fixed side A to which the detector 2 is connected.

However, in the above-mentioned conventional proposal, there is a disadvantage that the load value acting on the roof corner portion B1 of the automobile body B, that is, the test object cannot be accurately detected.

That is, in the load detecting apparatus, when the load plate 1 is brought into contact with the DUT (the roof corner portion B1 of the automobile body B in the illustrated example), the load of the load plate 1 itself is zero. Since it is difficult to bring the state into the state, the load F acts, and as a result, from the numerical value detected by the detector 2,
An operation for subtracting the load equivalent to the load of the load applying plate 1 must be performed.

Particularly, as shown in the illustrated example, the load F acting on the load plate 1
Angle S with respect to the vertical direction T at the load acting point on the test object, the angle θ
Is changed, the load value of the load plate 1 must be adjusted and corrected, and the load test using the detection device is complicated and troublesome, and an accurate detection result is obtained. There is an inconvenience.

Therefore, the present invention was devised in view of the above-mentioned circumstances, and its purpose is to perform a strength test of an automobile body so that an accurate detection result can be obtained with a simple operation. It is to newly provide an optimal load detection device.

[Means for Solving the Problems]

In order to achieve the above object, the structure of the load detecting device according to the present invention comprises a load load plate which is brought into contact with a device under test and to which a load from an actuator is appropriately applied, and a load value applied to the load load plate. In the load detection device having a detector for detecting the load, the load load plate is composed of a lower load plate that contacts the DUT, and an upper load plate to which a load from the actuator is applied. At the same time, the detector is arranged between the upper load plate and the lower load plate, and the lower load plate is supported by the upper load plate under the interposition of a coil spring. is there.

[Action]

Since the lower load plate is supported by the upper load plate with the coil spring interposed, the load of the lower load plate itself is reduced.

The load acting on the upper load plate is
It is directly detected by a detector provided between the lower load plate and the so-called weightless state.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

As shown in FIG. 1, the load detecting device according to the present invention is
The load loading plate 10 and the detector 20 are included.

The load loading plate 10 includes a lower loading plate 11 and an upper loading plate 12.
And a coil spring 13 interposed between these plates,
Consists of.

The lower load plate 11 is formed so that its planar shape is a so-called balanced shape such as a rectangle or a circle, and its lower surface is a test object, for example, a roof of an automobile body B in the illustrated example. The contact surface 11a is in contact with the corner B1 and the like.

In the illustrated example, the contact surface 11 is attached to the roof corner B1.
When a is abutted, its center is utilized.

The lower load plate 11 is formed by connecting a plurality of (four in the illustrated example) columns 14 on the upper surface thereof.
The axial direction is formed so as to be perpendicular to the lower load plate 11.

That is, consideration is given so as to match the acting direction of the load F described later.

A flange portion 14a is formed on each upper end of the column 14, and an upper end of a coil spring 13 described later is brought into contact with the lower surface of the flange portion 14a.

The upper load plate 12 is formed so that a load F from an appropriate actuator (not shown) acts on the center of the upper surface of the upper load plate 12. In the illustrated example, the lower load plate 11 has a planar shape corresponding to that of the load F. It is formed to have a shape.

Then, through holes 12a corresponding to the number of the columns 14 are opened in the upper load plate 12, and the upper ends of the columns 14 are inserted into the through holes 12a, respectively.

It should be noted that the size of each of the through holes 12a is such that when the pillar 14 is inserted into the through hole 12a, the pillar 1 is formed on the inner circumference of the through hole 12a.
The outer circumference of No. 4 does not come into sliding contact.

That is, when the load F is applied to the upper load plate 12 and the upper load plate 12 is moved toward the lower load plate 11 below, the movement of the upper load plate 12 is hindered by the lower load plate 11. I am trying not to let it go.

Therefore, the upper load plate 12 can freely move up and down independently of the lower load plate 11 except for the interposition of a coil spring 13 described later.

As described above, the coil spring 13 has an upper end abutting on the flange portion 14a and a lower end abutting on the upper surface of the upper load plate 12.

The coil spring 13 is an extension spring and acts to increase the distance between the lower surface of the flange portion 14a and the upper surface of the upper load plate 12.

Therefore, the coil spring 13 lifts and supports the lower load plate 11 with the upper load plate 12 as a fulcrum, and accordingly, the load (on the DUT) of the lower load plate 11 becomes zero. .

The detector 20 has a well-known structure called a so-called load cell, and includes a main body 21 and a rod 2 that is a pair of upper and lower parts.
2 and 23.

The lower end of the rod 22 is connected to the lower load plate 11, and the upper end thereof is guided by the main body 20.

The upper end of the rod 23 is connected to the upper load plate 12, and the lower end thereof is guided by the main body 20.

Therefore, when the relative distance between the lower load plate 11 and the upper load plate 12 is to be changed by, for example, the transfer (lowering) of the upper load plate 12, the change amount is displayed. When the movement is due to the load F, the displayed change amount is displayed as the load amount.

The supporting configuration of the load detecting device according to the present invention formed as described above is, for example, fastening a wire or the like to the upper load plate 12, or connecting an arm in the lift mechanism to the upper load plate 12, It is an arbitrary mode.

Further, it goes without saying that the automobile body B, which is the device under test, is placed in a fixed state such that the lower end thereof is connected to the fixed side A.

Therefore, for example, as shown in the figure, when carrying out a strength test on the roof corner portion B1 of the automobile body B, the center of the lower surface 11a of the lower load plate 11 is located at a predetermined portion and in the tangential direction of the predetermined portion. The lower surface 11a is abutted so as to be along.

At this time, the load detection device is moved (moved down) along the direction of the vertical line (the acting direction of the load F) with respect to the corner portion B1, and the contact is performed.

Before the contact is performed, the upper load plate 11 is in a so-called zero load state by the coil spring 13 interposed between the upper load plate 12 and the detector 20. The load F from the moment when the lower load plate 11 is brought into contact with the object to be tested is displayed on the detector 20 as long as the display in FIG.

Therefore, for example, when the load F is increased and the test subject is warped, the maximum load is displayed on the detector, and the detection result needs correction such as correction. Without this, you can use it as it is.

Further, even if the object to be tested is changed or the test site is changed so that the angle of the lower load plate 12 with respect to the horizontal line direction is changed, the load of the lower load plate 11 remains the coil spring. Since it is always in the zero state by 13, the acting load F is detected by the detector 20 only by lowering the upper load plate 11 as described above.
Also in this case, no correction allowance such as the correction is required.

The detection result from the detector 20 may be displayed only on the main body 21 portion of the detector 20, and
Needless to say, it may be connected to a video screen device or the like for so-called simulation display.

[Effect of device]

As described above, according to the present invention, since the self-weight in this type of device does not act on the DUT, the detection result can be used as it is without taking a measure of correction allowance such as correction, and an accurate measurement can be made. Since the load can be measured and the device under test is changed or the test conditions are different, only a single operation, that is, the movement (up and down movement) of the device is sufficient, so the operation is easy. And many other effects are achieved.

[Brief description of drawings]

FIG. 1 is a structural view showing an embodiment of the present invention in principle, and FIG. 2 is a structural principle view showing a conventional example. [Explanation of supplementary items] 10 ... Load plate, 11 ... Lower load plate, 12 ... Upper load plate, 13 ... Coil spring, 20 ... Detector.

Claims (1)

[Scope of utility model registration request] 1. A load comprising: a load load plate which is brought into contact with an object to be tested and to which a load from an actuator is appropriately applied; and a detector which detects a load value applied to the load load plate. In the detection device, the load load plate is composed of a lower load plate that comes into contact with the DUT, and an upper load plate to which a load from an actuator is appropriately applied, and the detector is an upper load plate and a lower load plate. Be distributed between, and
A load detecting device characterized in that the lower load plate is supported by the upper load plate while interposing a coil spring.