JPS58115340A - Testing device for vibration - Google Patents

Abstract

PURPOSE:To easily and precisely perform vibration test including inclined and horizontal vibration under a condition including temperature, humidity or the like, by sealing a part between a bottom wall part provided with a hole into which an exciting shaft is inserted with sealing material and top plate part with a cornice-like peripheral wall body. CONSTITUTION:A part between the bottom wall part 7 provided with the hole 10 into which the exciting shaft 3 is inserted with the sealing material 11 and the top plate part 8 interlocked with the bottom wall part 7 through a spring protecting cylinder 19, a coil spring 17, a strut, etc. is sealed with the cornice- like peripheral wall body 9 which is freely open upwards to form an air-conditioning tank. Consequently the deterioration of airtight and adiabatic property due to the pressure change of the air-conditioning tank which is caused by the capacity change due to vibration is prevented and a body 5 to be tested is easily attachable/detachable. When vibration and rotation around a horizontal axial center C is performed in one united body with an external container 2, inclined and horizontal exciting is also executed. Thus the vibration test including the inclined and horizontal vibrations can be easily and precisely performed under various temperature and humidity conditions.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vibration testing apparatus for use in complex environment tests, etc., which conducts vibration tests under conditions such as predetermined temperature and humidity.

Conventionally, vibration test equipment has been known in which the excitation shaft of the vibration generator protrudes into the constant temperature chamber through a hole in the bottom wall of a fixed constant temperature chamber. It was difficult to do so, and horizontal vibration was impossible. In addition, conventionally, as illustrated in Figs. 1 and 2, a thermostat (a)
has a fixed box shape and a notch (C) is formed in the bottom wall (b), and the lid (d) is fit into this notch (C) so that it can be freely pulled out in the direction of arrow (6). The excitation axis (f) of the vibration generator (e) protruding into the tank (a) is connected to the half inside (g) of the bottom wall (b) and the half inside (h) of the lid (d). The specimen (
j) When installing or removing the cover (
d) was removed, the wheels of the thermostatic oven (a) were guided on a rail (not shown), and the thermostatic oven (a) was moved in the east direction of the arrow. However, in the latter case, in order to pull out the lid body (d) in the direction of arrow W, the sealing material (k) (1) corresponding to the front and rear surfaces of the vibration shaft (f) is separated. Moreover, it has a structure in which it is difficult to make close contact between the sealing material (k) (+) and the vibration axis (f), resulting in poor airtightness. In particular, the excitation shaft (f) moves in and out of the fixed box-shaped thermostatic chamber (a) during vibration, (cross-sectional area of the excitation shaft) x
(stroke), the pressure inside the thermostatic chamber (a) changes, and the plate-shaped sealing material (k) changes.
(The seams and the tip of the lip become loose, causing gas to enter and exit as shown by the broken line in Figure 1, which deteriorates the heat insulation effect of the thermostatic chamber (a), resulting in uneven temperature distribution within the chamber (a). The major drawback was that it was uniform.

Furthermore, any of the conventional vibration testing apparatuses has the inconvenience of not being able to vibrate the specimen in the oblique or horizontal direction under conditions such as predetermined temperature and humidity.

The present invention aims to eliminate such conventional drawbacks, and the first feature of the invention is that a hole is provided in the bottom wall through which the vibration shaft of the vibration generator is inserted. A complete circumference sealing material is attached to the hole, a top plate is provided parallel to the bottom wall, and a bellows-shaped surrounding wall that can be opened upward is sealed between the top plate and the bottom wall. The surrounding wall, the top plate, and the bottom wall form a constant temperature chamber, and the specimen is housed in the constant temperature chamber and connected directly or indirectly to the vibration axis to maintain a predetermined temperature. Or, it is configured to perform a vibration test under conditions such as humidity. Further, the second invention is characterized in that the outer container body of the vibration generator is attached to the guide case via a vibration isolation mechanism at a symmetrical position of 180 degrees when viewed from above, and the outer container body of the vibration generator is mounted on the guide case as a base. The bottom wall of the constant temperature chamber is attached to the table so as to be able to swing around the horizontal axis, and the bottom wall of the constant temperature chamber having an openable bellows-shaped peripheral wall is attached to the guide case with a fixing member, and the vibration generator and the The thermostatic chamber is oscillated integrally around the horizontal axis as described above, so that vibration tests in the diagonal or horizontal directions can be performed under conditions such as the predetermined temperature or humidity within the thermostatic chamber. It is in a composed point.

Hereinafter, the present invention will be explained in detail based on illustrated embodiments.

In Figures 3 to 5, (1) is a vibration generator, which is of an electrodynamic type or hydraulic type, and (2) is an outer container body with an excitation axis ( 3), and the vibration axis (3
) A specimen mount (4) is arranged in series at the upper end of the specimen mount (4), and various specimens (5) are fixed to the mount (4). (6) is a constant temperature bath, which is formed into a sealed box shape by a bottom wall (7), a top plate (8), a bellows-shaped peripheral wall (9), and the like. Constant temperature bath (6)
The bottom wall (7) has a hole 0 through which the vibration shaft (3) is inserted.
0 is opened, and the vibration axis (3) and the hole α1 are installed in the hole 00.
Completely circumferential sealing material 0 → to maintain airtightness by sealing between
is attached. A part of the vibration shaft (3), the mounting base (4), and the specimen (5) are housed in the thermostatic chamber (6). Moreover, 09... is a plurality of pillars, which support the top plate part (8) in parallel with the bottom wall part (7).

Further, the bellows-shaped peripheral wall body (9) fixes the three-layer bellows body α in a suspended manner from the top plate portion (8), and has an annular movable plate 03 on the lower edge of the bellows body α4. is attached to the lower surface of the movable plate 03, and a sealing material α→ is attached to the lower surface of the movable plate 03.

The movable plate 03 has a hole o through which the support column αQ... is inserted.
Q... is installed through the column, and the column a4 and the hole α→ are fitted so that they can freely slide in the axial direction.A coil spring (17) is arranged around the column 0υ, and the upper and lower portions of the coil spring αη Both ends are connected to the top plate part (8) and the movable plate 0, respectively, and the movable plate α is always biased in the direction of resiliently pulling upward. 08)... is a removable locking mechanism that locks the movable plate a3 to the bottom wall (7), and the movable plate 03 locks the sealing material a.
The bellows main body α is brought into contact with the bottom wall portion (7) via →, and the bellows main body α is held in an extended state as shown in FIGS. 3 and 4. On the other hand,
When the locking mechanism 08) is removed by hand, the movable plate [alpha] is pulled upward as shown in Fig. 5 by the elastic urging force of the coil spring [alpha], and the bellows body (2)... is in a contracted state. As a result, the bellows-shaped surrounding wall (9) is configured to be able to open upwards, and only the support column OQ remains as shown in Fig. 5. Therefore, in the case of a light and small specimen (5), It can be easily attached to and removed from the mounting base (4) of the vibration generator (1).

After installing the specimen (5), pull down the surrounding wall (9) against the spring α force, and use the locking mechanism (to) to lock the bottom wall (
7), the top plate part (
8) and the bottom wall (7), the thermostatic chamber (6) is sealed.

Note that the force of the coil spring α is covered by a bellows-shaped protective cylinder 01 to protect the coil spring αη and the hands and arms.

As shown in FIG.
) are connected. This atmosphere control device consists of a refrigerator, a heater, a humidifier, an air blower, etc., and a constant temperature and humidity control panel. The atmosphere inside the machine is detected, inputted (feedback) to the control panel, and controlled under various conditions. Also, (to) is the air exhaust hole, and the pipe (a)
It is discharged at In addition, when the entire thermostatic chamber (6) is tilted diagonally or horizontally as described later, the conduit Q1) (
b) shall be made of flexible material.

Although the number of bellows bodies (6) is not limited to three and can be increased or decreased, by forming a heat insulating air layer between them, the atmospheric conditions in the thermostatic chamber (6) can be adjusted. It becomes easy to keep it constant.

As shown in FIGS. 5, 6, and 7, one of the plurality of columns a9 (15a) is pivotably supported on the bottom wall (7). and the remaining pillars (1
5b)... has a locking tool (c) attached to it protruding from its lower end so that it can be freely stored, and a resilient member (c) such as a coil spring.
Normally, it is elastically biased to protrude downward. A screw hole (A) is provided in the bottom wall (7) corresponding to this locking tool (C), and a detachment operation handle (to) having a threaded end is screwed into the screw hole from below. Then, if you turn the handle (to) in the direction of the arrow in Fig. 7 to push up the locking tool (c) that is locked in the screw hole (to) using this screw part, it will finally lock. The tool (C) will be removed from the screw hole (C), so as shown in Figures 5 and 6, rotate the thermostatic chamber (6) around the support (15a) and place it above the mounting base (4). can be opened wide. Therefore, even the specimen (5) which is heavy and has a large volume can be easily attached to or removed from the mounting base (4) by hanging it with a crane or the like.

In addition, as in another example shown in FIG.
Attach a locking tool (C) with the operating arm protruding from the lower end of the handle, and push the operating arm upward against the elastic member (C) with your hand to release the operating arm (C). It is also preferable to have a structure in which the bottom wall portion (7) is disengaged from the breast (26a).

Next, in FIGS. 3 and 9, (7) is a base installed on the floor, for example, an inverted gate type, with a large diameter circular hole C3.
1) Has ot+. Attach the hollow case (A) with a concave inside to this hole 0]). The axis of the hole G1)01) is the horizontal axis center (Q) which is
C32i is pivotably supported. Furthermore, the outer container body (2) of the vibration generator (1) is equipped with a vibration isolation mechanism (up) consisting of an air spring (up) and a guide rod (b), etc.
Attach to the guide case (2) (a) via the. Therefore, the vibration generator (1) can be swung around the horizontal axis (C), and can be tilted sideways from diagonally to horizontally as shown in FIG.

Of course, a detachable fixing mechanism for fixing in a predetermined posture is separately provided, but is not shown.

Furthermore, the bottom wall (7) of the thermostatic chamber (6) is attached to the guide case (2) with a fixing member (toward), so that the thermostatic chamber (6) is also integrally connected to the vibration generator (1). Horizontal axis (C)
It can be swung around and tilted to any position, and the specimen (
5) It is configured so that vibration tests in the diagonal or horizontal directions can also be performed. Of course, the atmospheric conditions within the constant temperature bath (6) at this time are controlled to predetermined conditions. In Fig. 9, the specimen (5) is attached to the specimen (5) via the specimen horizontal vibration mounting jig (9).
is indirectly fixed to the vibration shaft (3).

According to the embodiment of the present invention, the lower end of the support column (15b) can be easily and quickly connected to the bottom wall (7
), and the top plate (
8) and the surrounding wall body (9) that opens upward are rotated as one unit, and the vibration axis (3) of the vibration generator (1) is rotated as shown in FIG.
) can be largely opened near the top, making it possible to install and remove heavy and large-volume specimens (5) using a crane, etc.
It's easy and convenient. And, after installation, on the contrary, the support (
15a) and is fixed to the bottom wall (7) by the engagement/disengagement mechanism at the lower end of the support (15b), and the bellows-shaped surrounding wall (9)
The thermostatic chamber (6) is quickly sealed by pulling it downward, and a vibration test can be performed under predetermined conditions such as temperature and humidity. Moreover, an air insulation layer can be formed by using a plurality of bellows main bodies Q4, and at the same time, the fluctuation in volume (vibration) corresponding to the product of the stroke and cross-sectional area of the vibration shaft (3) during vibration can be prevented by flexible This can be easily absorbed by the deformation of the bellows main body (6), which does not allow air to enter or exit from the sealing material 01, and the heat insulating effect of the thermostatic chamber (6) is extremely good. Furthermore, the flexible bellows main body α function absorbs the above-mentioned fluctuations in volume (vibration) of the thermostatic chamber (6), eliminates pressure fluctuations, and it is necessary to make the thermostatic chamber (6) mechanically strong. Since there is no heat exchanger, the weight can be reduced, and as a result, the constant temperature bath (6) and the vibration generator (1) can be easily and quickly tilted toward each other as shown in FIG. (In other words, horizontal vibration is possible.) Note that the present invention is limited to the illustrated embodiment, and the design may be changed without changing the gist of the invention. The planar shape of ) can be square, circular, or various polygonal shapes, and the rear wall may be used as a fixed wall as part of the periphery. In addition, the number of pillars should be at least two, but the number can be increased or decreased as desired.

The present invention has effectively achieved its intended purpose with the configuration detailed above. In particular, since the bellows-shaped surrounding wall body (9) can be opened upwardly, the work of attaching and detaching the specimen (5) can be done easily and quickly. In addition, the vibration shaft (3) is always inserted into the hole OQ of the bottom wall (7) of the thermostatic chamber (6), and the sealing material (1η) is used to ensure that the entire circumference is sealed. There is no air going in or out, and the insulation effect is excellent.

In addition, although the vibration of the vibration shaft (3) does not cause fluctuations in the atmospheric pressure inside the thermostatic chamber (6), this pressure fluctuation is absorbed by the bellows-shaped surrounding wall (9). ) does not need to be made as robust as in the past, and weight reduction can be achieved.

Also, due to this weight reduction, there is a constant temperature chamber (
6) The tilting operation is also easy (it has the advantage of being easy to do).

In addition, although the constant temperature oven (6) may seem fragile, vibration is not transmitted between the vibration generator (1) and the guide case (2) due to the vibration isolation mechanism c9, and the vibration is not transmitted to the vibration generator (1) and the guide case (2). Almost no vibrations are transmitted to the constant temperature bath (6), and although the constant temperature bath (6) has a flexible structure that absorbs vibrations, it also has excellent durability. Of course, such a bellows-like peripheral wall (
9) The constant temperature bath (6) has the advantage of being lightweight and inexpensive, and
When the vibration test is performed at a frequency of 1000 Hz or higher, the noise generated from the specimen (5), the mount (4), or the vibration shaft (3) is particularly unpleasant and is also a problem in terms of labor and hygiene.
In particular, the bellows-shaped peripheral wall (9) has an excellent effect of blocking high-frequency sounds of 1000 Hz or more, which is comparable to or better than that of the fixed wall. Furthermore, the vibration generator (1) and the constant temperature bath (6) are oscillated around the horizontal axis (C) in one body,
Vibration tests in the diagonal and horizontal directions can now be easily performed under various temperature and humidity conditions.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional side view showing a conventional example, and FIG. 2 is a perspective view of the main part thereof. Fig. 3 is a partially sectional front view showing an embodiment of the present invention, Fig. 4 is a partially sectional side view, Fig. 5 is a sectional front view of the main part in an upwardly open state, and Fig. 6 is an even larger open view. FIG. 7 is an enlarged cross-sectional view of a main part, FIG. 8 is a cross-sectional view of another specific example, and FIG. 9 is a side view showing a state of horizontal vibration. (1)... Vibration generator, (2)... Outer container method, (3
)...Excitation axis, (5)...Specimen, (6)...Thermostatic chamber, (7)...Bottom wall part, (8)...Top plate part, (9
)...Accordion-like peripheral wall, 00...Hole, Ql)...
・Sealing material, ■...Base, (2)...Guide case, (To)...Vibration isolation mechanism, (To)...Fixing member,
(Q...Horizontal axis. Figure 1, Figure 2, Figure 3, Figure 4, Figure 5, Figure 7, Figure 8, Figure 6a)

Claims (1)

[Claims] / A hole 00 through which the vibration shaft (3) of the vibration generator (1) is inserted is opened in the bottom wall (7), and a complete circumference sealing material Q1) is applied to the hole OQ. A top plate (8) is attached and parallel to the bottom wall (7), and a bellows-shaped peripheral wall (9) that can be opened upward is attached to the top plate (8) and the bottom wall (7). ), the surrounding wall (9), the top plate (8), and the bottom wall (7) form a constant temperature chamber (6), and the specimen (5) is kept at the constant temperature. A vibration test characterized by being configured to be housed in a tank (6), connected directly or indirectly to the vibration shaft (3), and to conduct a vibration test under conditions such as predetermined temperature or humidity. Device. 2 Attach the outer container body (2) of the vibration generator (1) to the guide case @ (to) via the vibration isolation mechanism) (to),
The guide case C@(2) is centered horizontally (Q) on the base (1).
The bottom wall (7) of the thermostatic chamber (6) is attached to be swingable around the body and has a bellows-shaped peripheral wall (9) that can be freely opened.
Attach to the above guide case (to) with the fixing member (to),
The vibration generator (1) and the thermostatic oven (6) are oscillated together around the horizontal axis (Q), and the vibration test in the diagonal or horizontal direction is performed at a predetermined position in the thermostatic oven (6). A vibration test device characterized in that it is configured to be able to perform the test under conditions such as temperature or humidity.