JPH02674Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an environmental testing device that conducts vibration tests under environmental conditions with controlled temperature and humidity.

Vibration tests are often performed in temperature and humidity controlled rooms to test products used in harsh environmental conditions. For this purpose, an environmental test device that combines a constant temperature and humidity chamber and a vibrator is required.

FIG. 1 shows a conventional environmental test device of this type, as disclosed in, for example, Japanese Patent Publication No. 54-6380.
In the figure, 1 is a constant temperature and humidity chamber, 2 is a vibration table, 3 is a vibration exciter base, 4 is a vibration exciter drive unit, and 5 is a vibration excitation table.
6 is a shaft, 6 is a flexible member, 7 is a spring, 8 is a product to be tested, and 9 is a bottom surface of a constant temperature and humidity chamber.

Next, the above configuration will be explained in detail. A test article 8 to be subjected to an environmental test is fixed to a vibration table, and the vibration table 2 is fixed to a vibration exciter drive section 4 through a shaft 5 penetrating the bottom surface 9 of the thermostatic chamber. The vibration exciter drive unit 4 differs depending on the type of vibration exciter, and may be an electromagnetic moving coil, a DC motor and a cam, or a DC motor with an eccentric load. This is a drive unit that vibrates the table 2 in the vertical direction. Note that this exciter drive unit 4 is normally vibration-isolated by a spring 7 and placed on the exciter base 3, and the frequency and rotational speed of this exciter drive unit 4 can be changed as desired. The product under test 8 can be vibrated up and down at a frequency of . Since the product to be tested 8 is placed inside the constant temperature and humidity chamber 1, temperature and humidity tests can be performed simultaneously.

In addition, since the shaft 5 vibrates up and down, the bottom surface 9 of the constant temperature chamber should be provided with a through hole larger than the shaft diameter to prevent contact with the shaft, or a well-insulated rubber or A flexible material 6 such as cloth is used to reduce the gap between the through holes.

The conventional environmental test equipment is configured as described above, and since the excitation table 2 is located inside the constant temperature/humidity chamber 1, the product under test 8 is brought in through the door of the constant temperature/humidity chamber 1. When fixing it on the vibration table 2, it is easy to fix it in the front, but it is difficult to fix it in a corner or back.

This idea was made in order to eliminate the drawbacks of the conventional ones as mentioned above, and the excitation table 2
It is an object of the present invention to provide an environmental testing device that can rotate the test object 8 and facilitate the work of fixing the test object 8 to the vibration table 2.

The environmental test device according to this invention connects a vertical rotating shaft to a vibrating machine base that connects a vibrating table, and supports this rotating shaft with a bearing so that the vibrating table can be moved in a horizontal plane. The shaft is rotatably supported, and a fixing bolt for the rotating shaft is provided in this bearing portion.

The vibration table in this invention can be rotated in a constant temperature and humidity chamber, so when carrying the test product through the door of the constant temperature and humidity chamber and fixing it on the vibration table, it is difficult to reach into the chamber with your hand. Instead of stretching it, you can rotate the vibration table and fix it in front.

An embodiment of this invention will be described below with reference to the drawings. In FIG. 2, numerals 1 to 9 are the same as those of the above-mentioned conventional art, and therefore their explanations will be omitted. 10 is the exciter base 3
11 is a bearing for the rotating shaft, 12 is a bearing base, and 13 is a fixing bolt.

When conducting a vibration test, by tightening the fixing bolt 13 and pressing the rotating shaft 10,
The rotating shaft 10 is fixed. When this fixing bolt 13 is loosened, the vibration exciter base 3, the vibration exciter drive section 4 located above it, the shaft 5, and the vibration table 2 are removed.
are respectively rotatable around the rotating shaft 10.
Therefore, when a rotational torque is applied to the vibrator base 3, the rotating shaft 10 rotates within the bearing 11. Bearing 1
1 further supports the weight of the vibrator section above the rotating shaft 10. Note that the rotating shaft 10 and the bearing 11 are supported by a bearing base 12 so as not to tilt.

The present invention has the above-mentioned configuration, and when fixing or removing the product under test 8 from the vibration table 2, first open the front door of the thermostatic chamber, is placed on the vibration table 2. Next, the fixing bolt 13 is loosened, the vibration exciter base 3 is turned, the vibration table 2 is rotated, and the position of the test article 8 is determined. Once the position is determined, fix the test article 8 to the vibration table 2 with bolts from the side near the front of the constant temperature chamber on the vibration table 2, then rotate the vibration table 2 and move it to the other side. Also fix the part. Therefore, with conventional equipment,
If the test object is large and you have to tighten or remove fixing bolts deep inside it, it is difficult to reach or use tools properly, but with this device, this work can be difficult. Since the vibration table rotates freely, the above operations can be easily performed.

As described above, according to this invention, since the excitation table 2 is configured to be rotatable, the work of fixing the test article 8 to the excitation table 2 can be done extremely easily. As such, there is no need for a complicated structure in which the entire vibration table is taken out of the tank.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view showing a conventional environmental test apparatus, and FIG. 2 is a front sectional view showing an environmental test apparatus according to this invention. In the figure, 1 is a constant temperature chamber, 2 is a vibration table, 3 is a vibration exciter base, 4 is a vibration exciter drive unit, 5 is a shaft, 8 is a product under test, 10 is a rotating shaft, 11 is a bearing,
12 is a bearing base. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] Environmental test equipment consisting of a combination of a constant temperature and humidity chamber with a door on one side for loading and unloading the tested product, and a vibration machine, and a vibration table built into the constant temperature and humidity chamber. A vertical rotating shaft is coupled to a vibrator base that connects the vibration table, and this rotation shaft is supported by a bearing so that the vibration table can rotate in a horizontal plane. An environmental testing device characterized in that the bearing portion is provided with a bolt for fixing the rotating shaft.