JPH03210445A - Pressure measuring device - Google Patents

Abstract

PURPOSE:To detect a correct pressure by means of fastening a screw after an environmental test by forming a pressure detector freely removably which is held between an upper plate and a base plate through fastening of the screw. CONSTITUTION:In measuring a pressure, a base plate 1 on which a pressure detector 6 is removed is equipped with a hole 3 for permitting the pressure detector 6 to be removed and a lid plate 2 which is freely removably engaged with the hole 3. In addition, a block 7 is provided which maintains a distance S by being engaged with the hole 3 when the pressure detector 6 and the lid plate 2 have been removed. Therefore an environmental test due to application of vibration or a temperature change is to be performed in a state that a screw 5 is being fastened, the pressure detector 6 is once removed and the environmental test is performed. Then after the environmental test, the pressure detector is again mounted.

Description

[Detailed Description of the Invention] [Summary] Regarding a pressure measuring device formed to tighten a base plate and a top plate with screws and measure the pressure at that time, tightening of the screws after an environmental test due to vibration or temperature change. For the purpose of accurate pressure detection, there is a hole in the base plate for removing and removing the pressure sensor when measuring pressure, and a removable hole in the base plate. In addition, when the pressure detector and the cover plate are removed, a block is provided which maintains the distance by being locked in a mathematical manner when the pressure detector and the cover plate are removed.

[Industrial application field]

The present invention relates to a pressure measuring device configured to tighten a base plate and a top plate with screws and measure the pressure at that time.

BACKGROUND ART In assembly work for electronic devices and the like, predetermined parts are fixed to a board or the like by screwing the machine screws.

The tightening of screws used to attach small screws, especially when affected by environmental changes such as vibration or temperature changes, can lead to excessive tightening and loosening of the screws, resulting in parts falling off. .

Therefore, it is required that such machine screws be tightened as firmly as possible depending on the parts to be fastened.

[Conventional technology]

Conventionally, the structure was as shown in the conventional side view of FIG.

As shown in FIG. 3, the top plate 4, which is raised and lowered by the guidance of guide pins 13, is superimposed on the base plate l to which the feet lO are fixed by mounting screws 11, and the superposed base plate l and the top plate A plurality of pressure detectors 6 are provided between the pressure detector 4 and the pressure detector 4, which transmit predetermined signals depending on the pressing force.

In addition, a through hole IA is provided in the center of the base plate l, and a mounting hole 4A is provided in the center of the upper plate 4.
By communicating with the screw 5 is inserted as shown by the arrow.
A washer 15 is attached and the nut 12 is tightened.

Further, the output signal from the pressure detector 6 is sent to the display section 14 by the wiring member I6.

Therefore, by tightening the screw 5 to the nut 12, the base plate l
Each pressure detector 6 disposed between the upper plate 4 and the upper plate 4 is pressurized, and the value of the pressure at that time is detected by the display on the display section 14.

Therefore, with this configuration, the screws 5 used in the assembly work are actually tightened, the pressure at that time is detected, and within the allowable pressure range of the parts to be tightened,
In addition, consideration has been given to ensuring that the screws 5 can be tightened with appropriate pressure.

[Problem to be solved by the invention]

In such a configuration in which the pressure detector 6 is sandwiched between the base plate l and the upper plate 4, if the fastened parts are subject to environmental changes due to vibration or temperature changes, the pressure sensor 6 may be By applying a change, it is necessary to detect the change in pressure.

However, applying such vibrations or temperature changes will damage the pressure sensor 6.

Therefore, there was a problem in that pressure could not be detected after vibration or temperature change.

Therefore, an object of the present invention is to enable accurate pressure detection by tightening a screw after an environmental test due to vibration or temperature change.

[Means to solve the problem]

FIG. 1 is a diagram explaining the principle of the present invention.

As shown in FIG. 1, when measuring pressure, the pressure detector 6 is removed and removed. The base plate 1 has a hole 3 for removing the pressure sensor 6, and a hole 3 is removably locked in the equation 3. In addition, when the pressure detector 6 and the cover plate 2 are removed, a block 7 is provided which maintains the distance S by being locked according to Equation 3.

With this configuration, the above-mentioned problem is solved.

[Effect]

That is, the base plate 1 is provided with a hole 3 and a cover plate 2 that can be attached to and removed from the hole 3. If necessary, the cover plate 2 is removed and the base plate 1 and the upper plate 4 are attached with the screws 5 tightened. By removing the pressure detector 6 held between the two screws and locking the block 7 at the location where the pressure sensor 6 was removed, the screw 5 can be removed even if the pressure sensor 6 is removed. It is designed to maintain the tightened state.

Therefore, when performing an environmental test using vibration excitation or temperature change with the screw 5 tightened, -1.
By removing the pressure detector 6, performing an environmental test, and then mounting the pressure detector 6 again after the environmental test, it is possible to detect the pressure after the environmental test, which could not be detected conventionally.

〔Example〕 The present invention will be explained in detail below with reference to FIG.

FIG. 2 is an explanatory diagram of an embodiment according to the present invention, (a) (b)
) is a side view. The same reference numerals indicate the same objects throughout the figures.

As shown in FIG. 2(a), a hole 3 is provided in the base plate l so that the pressure detector 6 can be held by locking the cover plate 2 with the mounting screw 17. The rest of the configuration is the same as described above.

Therefore, first, by tightening the screw 5, the pressure detector 6
The output signal from the display unit 14 is sent to the display unit 14.
When tightening the screw 5, detect the pressure P, and then perform an environmental test in which vibration is applied or temperature changes are applied.
By removing the mounting screws 17, the cover plate 2, pressure detector 6, and base plate 1 are removed. As shown in (b), the block 7 is installed in the hole 3 using the mounting screws 17, and an environmental test is performed. conduct.

When installing the block 7 in this case, the gap S between the pedestal l and the upper plate 4 due to the tightening of the screws 5 should be maintained as it is, and the tightening should be done to minimize changes in the pressure P. Care has been taken to ensure that this does not occur.

Therefore, after the environmental test is completed, the block 7 is removed and reattached to the cover plate 2, pressure detector 6, and base plate l, and the pressure after the environmental test is determined by the output signal from the pressure detector 6. This makes it possible to actually measure changes.

By doing this, it is possible to detect the pressure after the actual environmental test due to the tightening of the screws 5, so for example, if the tightening of the screws 5 is within the allowable pressure range of the parts to be fastened, it will not damage the parts. Can be done to the fullest without.

〔Effect of the invention〕

As explained above, according to the present invention, the pressure detector that is held between the upper plate and the base plate when the screws are tightened is formed to be removable, so that the pressure detectors can be inserted and removed freely when the screws are tightened after the environmental test. can perform pressure measurements.

Therefore, it is possible to measure the actual change in pressure due to tightening of screws due to changes in the environment, making it possible to perform appropriate tightening during assembly work and prevent over- or under-tightening, which is the case in the past. This eliminates problems caused by loose screws, improves reliability in assembly work, and has great practical effects.

[Brief explanation of drawings]

FIG. 1 is a diagram explaining the principle of the present invention. FIG. 2 is an explanatory diagram of an embodiment according to the present invention, and (b) is a side view. FIG. 3 shows a conventional side view. In the figure, l is the base plate and 2 is the lid plate. 3 is the hole, 4 is the top plate. 5 is a screw, 6 is a pressure detector. 7 indicates a block. (a) Name of the principle of the present invention (α) (bl) Side view of a practical example according to the present invention

Claims (1)

[Claims] A pressure detector (6) is provided which is held between the base plate (1) and the upper plate (4) by overlapping them, and the base plate (1) and the upper plate (4) are fastened with screws (5). According to the base plate (1)
A predetermined gap (s) is formed between and the upper plate (4),
A pressure measuring device that measures pressure using an output signal (D) from the pressure detector (6), wherein the pressure detector (6) is removed from the base plate when measuring the pressure. (1) is provided with a hole (3) through which the pressure detector (6) is removed, and a cover plate (2) that is detachably engaged with the hole (3). ) and a block (7) that maintains the distance (S) by being locked in the hole (3) when the cover plate (2) is removed. .