JP4223372B2 - Vibration testing machine - Google Patents

Description

  The present invention relates to a vibration testing machine for performing a vibration test of a specimen fixed by shaking a vibration table.

  Conventionally, as a vibration testing machine, one that can selectively perform switching between a substantially vertical excitation and a substantially horizontal excitation by rotating an excitation unit is known. (For example, Patent Document 1).

  In this vibration testing machine, when vibrating in a substantially vertical direction, the vibration unit and the vibration unit are indirectly connected so that the vibration test can be performed with the vibration unit set to an arbitrary frequency. A supporting frame part to be supported is provided apart from each other, and an air spring is interposed between the exciting part and the supporting frame part. That is, the vibration spring is elastically supported by the air spring so that the vibration portion is maintained at the neutral position.

  On the other hand, when oscillating in a substantially horizontal direction, the air spring does not need to support the oscillating portion. Therefore, when the air spring is filled with air, the neutral position of the oscillating portion is shifted. Accordingly, since it becomes impossible to perform a vibration test at the set vibration frequency, when the vibration test in a substantially horizontal direction is performed, the air spring is filled so that the vibration unit returns to the neutral position. It is necessary to vent the air.

  When the air filled in the air spring is removed, the air spring contracts. Due to this contraction, a gap is generated inside the spring support that supports the air spring. Since the spring support portion is formed so as to accommodate the air spring therein, if the excitation portion is rotated in a state where the gap is generated, the air spring moves into the gap, thereby exciting the excitation portion. There is a risk that the center of gravity of the part will move rapidly, causing damage to the machine and the like.

Therefore, the spacer is sandwiched in the gap between the spring support portions before the exciting portion is rotated in the substantially horizontal direction, and the spacer is fixed with bolts, thereby fixing the contracted air spring and stabilizing the exciting portion. The state is rotated. Moreover, when rotating the vibration part again from a substantially horizontal direction to a substantially vertical direction, after rotating the vibration part, the volt | bolt and spacer which are fixing the air spring are removed.
JP 2003-149077 A

  However, there has been a problem that the operation of fixing the air spring contracted by using the spacer or the like as described above or the operation of releasing the fixing of the air spring is complicated.

  Accordingly, an object of the present invention is to provide a vibration testing machine that can more easily perform a fixing operation or an unfixing operation of a contracted air spring at the time of switching an excitation direction of an excitation unit.

In order to solve the above-mentioned problem, as shown in FIG.
A vibrating portion (4) having a protrusion (4a) on the outer peripheral surface and vibrating the first shaking table (3);
A support portion (5, 51, 52, 53) that supports the vibration portion in a freely rotatable manner and selectively switches the vibration direction by the vibration portion between a substantially vertical direction and a substantially horizontal direction. When,
A support frame portion (2) in which the support portion is rotatably provided;
A vibration testing machine comprising: a second shaking table that is connected to the first shaking table when the shaking direction of the shaking unit is set to a substantially horizontal direction and moves in a substantially horizontal direction by the shaking by the shaking unit. In
The support part is supported by the support part and vibrates the first shaking table in a substantially vertical direction, and an air spring (55) that supports the excitation part,
A moving member (54) fixed to the protrusion and supported so as to be movable in a substantially vertical direction in accordance with a volume change of the air spring when the first vibration table is vibrated in a substantially vertical direction;
And a clamp mechanism portion (20) for clamping and fixing the protruding portion or the moving member.

The invention according to claim 2 is the invention according to claim 1,
The clamp mechanism is
A piston rod (22) which is movable forward and backward in the moving direction of the protrusion or the moving member;
A lever (23) for advancing and retracting the piston rod;
Lever fixing means (231, 231a, 24, 241) for detachably fixing the lever.

  According to the first aspect of the present invention, the first vibration table is fixed to the projecting portion of the vibration unit, and is supported so as to be movable in the substantially vertical direction according to the volume change of the air spring when the first vibration table is vibrated in the substantially vertical direction. Since the projecting part of the moving member or the vibrating part is clamped and fixed by the clamp mechanism part, the air spring contracted via the projecting part or the moving member can be fixed or released more easily when the excitation direction of the exciting part is switched. It can be performed.

  According to the invention described in claim 2, it is of course possible to obtain the same effect as that of the invention described in claim 1. In particular, the clamp mechanism portion includes a lever locking portion, a locking claw, and a lever locking portion. Since the fixing member and the lever locking portion are provided, the lever can be fixed when the air spring is filled with air when the vibrating portion is vibrated in a substantially vertical direction. Therefore, the vibration of the lever that occurs during the vibration test can be suppressed, and the measurement accuracy can be improved.

  Hereinafter, a vibration testing machine as an embodiment will be described. FIG. 1 is a side view of a vibration testing machine in a state where the first shaking table is vibrated in a substantially vertical direction, and FIG. 2 is an air spring when the vibration testing machine of FIG. 1 is viewed from a direction orthogonal to the paper surface. FIG. 3 is a side view of the vibration tester in a state where the first shaking table is vibrated in a substantially horizontal direction, and FIG. 4 is a view of the vibration tester of FIG. 3 as viewed from a direction orthogonal to the paper surface. FIG. 5 is a plan view of the vibration tester of FIG. 3, and FIG. 6 is a front view of the vibration tester of FIG.

  As shown in FIGS. 1 and 3, the vibration testing machine 1 includes a support frame portion 2, a first vibration table 3 to which a specimen is fixed, a vibration unit 4 that vibrates the first vibration table 3, The first vibration table 3 is supported in a state in which the excitation unit 4 is supported and the support unit 5 is provided rotatably on the support frame unit 2 and the excitation unit 4 is rotated so that the excitation direction is substantially horizontal. And a second shaking table 6 connected to the.

Two support frame portions 2 are erected with the vibration portion 4 interposed therebetween. The support frame portion 2 forms an outer shell of the vibration testing machine 1, and the vibration portion 4 and the support portion 5 are rotatably provided. .
Bolt holes (not shown) are formed in the surface portion of the first shaking table 3 so as to be fixed with bolts (not shown) provided in the connecting portion 6 a of the second shaking table 6.

  The vibration part 4 is formed in a substantially columnar shape, and a protruding part 4a is provided on the outer peripheral surface thereof so as to protrude toward the support frame part 2 side. For example, the excitation unit 4 is disposed inside a permanent magnet (not shown) and a magnetic field formed by the permanent magnet, and is a drive coil (not shown) fixed to the lower surface of the first vibration table 3. And an elastic support portion (not shown) that elastically supports the first vibration table 3. When a predetermined alternating current is supplied to the drive coil from a power source (not shown), a force is generated in the drive coil so that the first vibrating table 3 vibrates.

  As shown in FIGS. 1, 2, and 5, the support portion 5 is formed in a substantially U-shape in plan view that opens to the vibration portion 4 side, and between the support frame portion 2 and the vibration portion 4. The support portion main body 51, the support frame portion 2 and the support portion main body 51, which are disposed between the support portion main body 51 and the support portion main body 51. 4 and a support member 53 and a moving member 54 disposed between the support member 53 and the air spring 55. The air spring 55 is fixed between the support member 53 and the moving member 54.

  The central portion of the rotating plate 52 is pivotally supported by the shaft portion 10 penetrating the support frame portion 2. Further, the portion outside the central portion of the rotating plate 52 and the support frame portion 2 can be fixed by being screwed together with the rotating clamp screw 11, and the vibrating plate 52 includes an exciting portion. 4 is provided with a handle 12 for switching the excitation direction.

  Then, when the rotating clamp screw 11 fixing the rotating plate 52 is unscrewed and the handle 12 is rotated in a predetermined direction, the support portion 5 is interlocked with the rotating operation of the handle 12. By rotating, the first shaking table 3 and the excitation unit 4 supported by the support unit 5 are rotated from, for example, a substantially vertical direction to a substantially horizontal direction.

  The support member 53 is attached to the support portion main body 51, and supports and fixes a portion serving as a lower surface of the air spring 55 when the vibration direction of the vibration portion 4 is a substantially vertical direction. As shown in FIGS. 2 and 4, the support member 53 is a plate-like member that is bent into a substantially L-shaped side surface, and one piece constitutes a plate-like air spring fixing portion 531 that fixes the air spring 55. The other piece constitutes a support portion fixing portion 532 fixed to the support portion main body 51.

  The moving member 54 is fixed to the protrusion 4 a of the vibration unit 4, and is fixed to a portion on the upper surface of the air spring 55 when the vibration direction of the vibration unit 4 is substantially vertical. The moving member 54 includes a plate-like air spring fixing portion 541 that is fixed to the air spring 55, and a protrusion fixing portion 542 that is fixed to the protrusion 4 a of the excitation unit 4. The part 541 and the air spring fixing part 531 of the support member 53 are arranged so as to face each other with the air spring 55 interposed therebetween. The moving member 54 is penetrated through a guide rail 511 provided in the support body 51 along a vibration direction of the vibration section 4 via a bearing (not shown), and is added with the guide rail 511 as an axis. It is configured to be movable in the swing direction.

  The air spring 55 supports the vibration unit 4 by adjusting the internal air pressure when the vibration direction of the vibration unit 4 is substantially vertical. Accordingly, as the volume of the air spring 55 changes, the moving member 54 moves along the guide rail 511, and the vibration unit 4 fixed to the moving member 54 via the protrusion 4a moves in the vibration direction. It is supposed to be.

Moreover, the one end part by the side of the 1st vibration stand 3 of the support part 5 becomes a notch shape as shown in FIG.2, FIG.4, FIG.6, and the clamp mechanism part 20 is provided in the notch part.
As shown in FIGS. 2 and 4, the clamp mechanism portion 20 is provided so as to be movable forward and backward in the moving direction of the main body 21 fixed to the support portion main body 51 and the protrusion portion 4 a of the vibration portion 4 from the inside of the main body 21. A piston rod 22 and a lever 23 provided outside the main body 21 for moving the piston rod 22 back and forth are provided.

  As shown in FIG. 4, when the lever 23 is pulled toward the air spring 55, the piston rod 22 protrudes from the main body 21 in conjunction with the operation, and the protruding portion 4 a of the vibration portion 4 faces the support member 53. Can be clamped. In other words, the moving member 54 and the air spring 55 can be fixed by clamping and fixing the protruding portion 4a of the vibrating portion 4.

  Further, as shown in FIGS. 1 to 4, the clamp mechanism unit 20 is provided on the first vibration table 3 side of the lever 23, and a lever locked portion 231 having a locking claw 231 a at the tip portion, and the piston rod 22. And a lever locking portion fixing member 24 projecting in a direction orthogonal to the advancing and retreating direction, and protruding at a predetermined position of the lever locking portion fixing member 24, and the engagement of the lever locked portion 231 at the tip portion. And a lever locking portion 241 formed to engage with the pawl 231a.

The lever locking portion 241 is formed of, for example, a metal plate material, and the tip portion can be elastically deformed. Therefore, when engaging the locking claw 231a of the lever locked portion 231 with the lever locking portion 241, the lever 23 is pulled in the opposite direction to the air spring 55 side and locked vertically to the lever locking portion 241. The nail 231a is inserted. The lever locking portion 241 into which the locking claw 231a has been inserted has its tip end pushed to both sides, and when the locking claw 231a is engaged with the lever locking portion 241, the tip end portion of the lever locking portion 241 is Return to the original state. In other words, the lever 23 is fixed by the engagement between the locking claw 231a of the lever locked portion 231 and the lever locking portion 241.
Further, when the fixed lever 23 is pulled toward the air spring 55 with a predetermined force or more, the engagement between the locking claw 231a and the lever locking portion 241 is released.

  Thus, the lever locked portion 231, the locking claw 231 a, the lever locking portion fixing member 24, and the lever locking portion 241 function as lever fixing means that fixes the lever 23.

Next, an example of a vibration test performed using the vibration tester 1 having the above configuration will be described.
First, when the vibration unit 4 is vibrated in a substantially vertical direction, as shown in FIGS. 1 and 2, the air spring 55 is filled with air to support the vibration unit 4.
When the excitation direction of the excitation unit 4 is switched from the substantially vertical direction shown in FIGS. 1 and 2 to the substantially horizontal direction shown in FIGS. 3 to 6, the air spring 55 supporting the excitation unit 4 is filled. Drain the air that has been. Next, the lever 18 of the clamp mechanism portion 20 shown in FIG. 4 is pulled toward the air spring 55, the piston rod 17 is protruded, and the protrusion 4a of the vibration portion 4 is clamped and fixed toward the support member 53 to contract. The air spring 55 is fixed.

Then, by unscrewing the rotation clamp screw 11 that fixes the rotation plate 52 and turning the handle 12 in one direction (for example, the forward rotation direction), the rotation plate 52 is rotated, thereby The 1 shaking table 3 and the vibration unit 4 are rotated in a substantially horizontal direction on the second shaking table 6 side.
After the vibration unit 4 is rotated in a substantially horizontal direction, as shown in FIG. 3, the first vibration table 3 is connected to the second vibration table 6 by a bolt (not shown) through the connection unit 6a. By this connection, the substantially horizontal excitation force of the excitation unit 4 can be applied to the second vibration table 6.

  Further, when switching the excitation direction of the excitation unit 4 from the substantially horizontal direction to the substantially vertical direction again, the handle 12 is rotated in the other direction (for example, the reverse direction) to rotate the excitation unit 4, and FIG. As shown, the air that is contracting by pulling the lever 18 of the clamp mechanism 20 in the opposite direction to the air spring 55 side, retracting the piston rod 17 into the main body 16, and releasing the clamp fixing of the protrusion 4a. The fixing of the spring 55 is released.

  Here, at the same time that the lever 23 is pulled in the direction opposite to the air spring 55 side, the locking claw 231a of the lever locked portion 231 of the lever 23 is engaged with the lever locking portion 241 of the lever locking portion fixing member 24. In combination, the lever 23 is fixed. Then, air is supplied to the contracted air spring 55 to pressurize it to support the vibration unit 4 and prepare for a vibration test in a substantially vertical direction.

  According to the vibration testing machine 1 according to the present invention, the first vibration table 3 is fixed to the support member 53 that supports the air spring 55 when the first vibration table 3 is vibrated in the substantially vertical direction, and the protrusion 4a of the vibration unit 4. When the first shaking table 3 is vibrated in the substantially vertical direction, the moving member 54 supported so as to be movable in the substantially vertical direction according to the volume change of the air spring 55 and the protrusion 4a or the moving member 54 of the vibration unit 4 are provided. Since the clamp mechanism 20 that clamps and fixes the support member 53 is provided, when the excitation direction of the excitation unit 4 is switched, the air spring 55 contracted via the protrusion 4a can be more easily fixed or released. It can be carried out.

  In addition, the clamp mechanism portion 20 includes a lever locked portion 231, a locking claw 231 a, a lever locking portion fixing member 24, and a lever locking portion 241. When the air spring 55 is filled with air when vibrating the lever 23, the lever 23 can be fixed. Therefore, the vibration of the lever 23 generated during the vibration test can be suppressed, and the measurement accuracy can be improved.

  The vibration testing machine according to the present invention is not limited to the above-described embodiment. For example, the moving member may be clamped and the structure of the clamp mechanism is not limited to the above embodiment. In addition, the lever fixing means of the clamp mechanism unit may be configured such that, for example, a hook is provided on the lever and a locking part is provided at a predetermined position, and the hook is hooked on the locking part to fix the lever. Further, the configurations or shapes of the support member, the moving member, and the support portion that support the air spring are not limited to the above-described embodiments, and can be changed as appropriate.

In the vibration testing machine which concerns on this invention, it is a side view of the state which vibrates a vibration part to a substantially perpendicular direction. FIG. 2 is an enlarged view of the vicinity of an air spring when the vibration tester of FIG. 1 is viewed from a direction orthogonal to the paper surface. In the vibration testing machine which concerns on this invention, it is a side view of the state which vibrates a vibration part to a substantially horizontal direction. FIG. 4 is an enlarged view of the vicinity of an air spring when the vibration tester of FIG. 3 is viewed from a direction orthogonal to the paper surface. It is a top view of the vibration testing machine of FIG. It is a front view of the vibration testing machine of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vibration testing machine 2 Support frame part 3 1st vibration stand 4 Excitation part 4a Protrusion part 5 Support part 7 2nd vibration stand 20 Clamp mechanism part 22 Piston rod 23 Lever 24 Lever locking part fixing member (lever fixing means)
51 Support body (support part)
52 Rotating plate (supporting part)
53 Support member (support part)
54 Moving member (supporting part)
55 Air spring (support)
231 Lever locked part (lever fixing means)
231a Locking claw (lever fixing means)
241 Lever locking part (lever fixing means)

Claims (2)

A vibrating portion having a protrusion on the outer peripheral surface and vibrating the first shaking table;
A support unit that rotatably supports the excitation unit, and that allows the excitation direction of the excitation unit to be selectively switched between a substantially vertical direction and a substantially horizontal direction;
A support frame portion in which the support portion is rotatably provided;
A vibration testing machine comprising: a second shaking table that is connected to the first shaking table when the shaking direction of the shaking unit is set to a substantially horizontal direction and moves in a substantially horizontal direction by the shaking by the shaking unit. In
The support part is
An air spring that supports the exciting unit when the first shaking table is vibrated in a substantially vertical direction;
A movable member fixed to the protrusion and supported so as to be movable in a substantially vertical direction in accordance with a volume change of the air spring when the first vibrating table is vibrated in a substantially vertical direction;
A vibration tester comprising a clamp mechanism that clamps and fixes the protrusion or the moving member. The clamp mechanism is
A piston rod which is movable forward and backward in the movement direction of the protrusion or the moving member;
A lever for advancing and retracting the piston rod;
Lever fixing means for detachably fixing the lever;
The vibration tester according to claim 1, further comprising:

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