JPH0622195Y2 - Shaking table device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a vibrating table apparatus applied to a vibration characteristic test of, for example, a tower-like structure of a tower, an observation tower, or a high-rise building.

[Prior Art] A conventional vibrating table device is shown in FIG. 6 (side view) and FIG. 7 (front view). As shown in FIG. 6, a general vibration table 1 for two-way vibration is arranged in a pit 11. Conventionally, in order to hold the vibrating table 1 horizontally, a link mechanism (rotatable type) 12, a supporting table 13, and an anchor bolt 1 are provided in a vertical direction
4 and concrete 15 are provided, and in order to vibrate the vibrating table 1, the vibrating machine 16 and the link mechanism 1 are provided in two horizontal directions.
7, the support mechanism 18 and the reaction force receiving base 19 were provided.

In such a configuration, the vibrating table 1 is supported by the link mechanism 12 arranged at the interval L. by the way,
When horizontal vibration X ₁ is performed by the vibrator 16, the link mechanism 12
Moves along a circular arc ac around the point b shown in FIG. 6 and also moves up and down by Δh. Here, the horizontal movement amount
Then, ▲ ▼ = l ₂ tan θ l ₂ : effective length of link mechanism 12 l ₂ = l ₃ −l ₁ l ₃ : length from lower end of link mechanism 12 to upper surface of vibrating table 1 l ₁ : link mechanism The length from the upper end of 12 to the upper surface of the vibrating table 1 is determined by θ: inclination angle.

The inclination θ of the link mechanism 12 can be ignored in the range where the horizontal vibration is delicate, but when the horizontal vibration is large, the link mechanism 1
The vibrating table 1 supported by 2 tilts greatly. This means that vibration is performed by adding the horizontal component and the tilt component. For this reason, conventionally, it is not possible to excite only an accurate horizontal component, and in particular, when a high-layer specimen is placed on the vibrating table 1, the inclination θ becomes even larger, so that an accurate horizontal excitation is possible. Can not get the data by.

The link mechanism 12 is connected to the vibrating table 1 and the supporting table 13 by pins. Therefore, there is a concern that the pin may come off due to the inclination as described above, and frequent maintenance is required.

Further, as shown in FIG. 7, the vibration exciter 16 for vibrating the vibrating table 1 in the X ₁ and Y ₁ directions has an allowable capacity in the X ₁ and Y ₁ directions (vibration direction). Demonstrate. However, X ₁ ,
Since the permissible capacity in the direction perpendicular to the Y ₁ direction is as low as 3%, the external force in such a direction may cause damage. For this reason, conventionally, for example, a jig (guide roller) such as the support mechanism 18 is provided so that an external force other than the vibration direction does not act on the vibrator 16.

[Problems to be Solved by the Invention] As described above, in the conventional vibrating table device, when the vibrating table is largely vibrated, the vibrating table is tilted, so that the tilt component is added to the vibrating component, and the vibrating accuracy is degraded. was there. Further, due to the inclination of the vibrating table, there are problems that the connecting portion with the vibrating table becomes weak and that a jig is required to prevent external force other than the vibrating direction from acting on the vibrating machine.

The present invention has been made in view of the above points, and an object thereof is to provide a vibrating table device that can vibrate without tilting the vibrating table.

[Means for Solving the Problem] A vibrating table device according to the present invention is one in which a vibrating table vibrated by a vibrating device is suspended in multiple stages. That is, the frame that supports the vibrating table is hung on another frame by a hanging member. Note that a structure (suspension structure) in which this is repeated in multiple stages may be used.

In addition, a damper member (attenuator) is arranged between the individual frames to prevent vibration of the individual frames.

[Operation] (1) Since the vibrating table is hung in multiple stages, the cycle of the vibrating table is the length obtained by adding the multi-stage hanging members. Therefore, even if the vibrating table is largely vibrated, the inclination of the vibrating table becomes small enough to be ignored. Thereby, the vibrating table can be accurately vibrated.

(2) Since the vibrating table is not tilted, the vibrating table and the vibration exciter can be connected with a simple structure, for example, a link mechanism (rod end and pin) and a rod end connecting member (screw construction), and the conventional vibration excitation can be performed. No jig is needed to prevent external force other than direction.

(3) Since the damper member is arranged between the frames, it is possible to suppress the vibration of the frame alone and to vibrate without power loss.

[Embodiment] Hereinafter, a vibrating table apparatus according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a side view showing the configuration of a vibrating table device in the case of a two-stage suspension structure, and FIG. 2 is a plan view thereof (the vibrating table 1 is omitted). The vibrating table 1 is arranged in the pit 11. The vibrating table 1 is connected to a vibration exciter 16 via a link mechanism 17, and is vibrated in the horizontal direction (X ₁ , Y ₁ direction) by the vibrating machine 16. In addition, 19 is a reaction force receiving stand.

Here, in the embodiment, the vibrating table 1 is suspended in two stages. That is, the vibrating table 1 is suspended by a suspension member (suspension line) 2, the floating frame 4 with the suspension member 2 is suspended by a suspension member 3, and the suspension member 3 is suspended by a fixed frame 5. The hanging members 2 and 3 are wire cables, for example. Further, in order to adjust the length of the hanging members 2 and 3, the adjusting jig 7 and the fixing jig 8 as shown in FIG.
Is provided with an adjusting mechanism.

FIG. 3 is a plan view showing a connection state between the floating frame 4 and the fixed frame 5. Floating frame 4 and fixed frame 5
An oil damper 6 is provided between and, and both frames 4 and 5 are connected by this oil damper 6. The oil damper 6 suppresses the independent vibrations X ₂ and Y ₂ of the frames 4 and 5 without power loss.

FIG. 4 is a diagram showing the configuration of the adjusting mechanism for the suspension members 2 and 3. In the example of FIG. 4, the floating frame 4 and the fixed frame 5
The suspending member 2 is disposed between them, an adjusting jig 7 for supporting a load in the horizontal X direction is provided on the fixed frame 5, and the adjusting jig 7 is screwed in the vertical direction to fix the fixing jig 7. Ingredient 8
The length l of the hanging member 2 can be changed to l ₄ by fixing it with.

According to such a configuration, since the vibrating table 1 is supported by the suspension structure as shown in FIG. 1, the cycle of the vibrating table 1 is determined by the total length of the suspension members 2 and 3. become. As a result, even if the vibrating table 1 is largely vibrated, the inclination of the vibrating table 1 can be made small enough to be ignored.

Here, if the lengths of the hanging members 2 and 3 are L ₁ and L ₂ ,
The period T of the two-stage suspended vibration table 1 shown in FIG. 1 can be calculated by the equation (1).

Therefore, the cycle T in the case of a multi-stage (n-stage) structure
_n can be calculated by the equation (2).

Further, conventionally, a considerable space is required to stably support the vibrating table 1. On the other hand, in the present invention, by dividing the necessary suspension member into a multi-stage type, the total length of the suspension member can be reduced, and there is an advantage that a space for supporting the vibration table 1 is not required so much. is there.

In this embodiment, the hanging member 2 is or constitutes a hanging member 3 by a single wire cable, for example, as shown in FIG. 5, the same cross-sectional area (A = πd ^2/4, A plurality of cables may be used so that m: the number of cables. Further, not only the wire cable but also a steel rod or a piano wire may be used.

[Advantage of the Invention] As described above, according to the present invention, since the vibrating table is supported by the suspension structure, the vibrating table does not tilt even if the vibrating table is largely vibrated. As a result, the vibration accuracy is improved.

Also, since the vibrating table does not tilt, the vibrating table and the vibration exciter can be connected with a simple structure such as a link mechanism and pins, and a jig is required to prevent external force other than the conventional vibration direction. There is also no. Further, by providing the damper member between the frames, it is possible to suppress the vibration of each frame alone, and it is possible to vibrate without power loss.

[Brief description of drawings]

1 is a side view showing the structure of a vibrating table device according to an embodiment of the present invention, FIG. 2 is a plan view of the vibrating table device, and FIG. 3 is a plan view showing the structure between frames in the same embodiment. FIG. 4 is a diagram showing a configuration of a suspension member adjusting mechanism in the same embodiment, FIG. 5 is a diagram showing a configuration of a suspension member as another embodiment of the present invention, and FIG. 6 is a conventional vibrating table device. FIG. 7 is a side view showing the configuration of FIG. 7, and FIG. 7 is a plan view of the vibrating table device. 1 ... Shaking table, 2 and 3 ... Hanging member, 4 ... Floating frame, 5 ... Fixed frame, 6 ... Oil damper, 7
…… Adjustment jig, 8 …… Fixing jig, 11 …… Pit, 16
...... Vibrator, 17 ...... Link mechanism, 19 ...... Reaction force receiving stand.

Claims (1)

[Scope of utility model registration request] 1. A vibrating table vibrated by a vibrating machine, a floating frame for supporting the vibrating table, a fixed frame for supporting the floating frame, and a suspension frame for suspending the floating frame. And a damper member for connecting the fixed frame and the floating frame to each other.