Vibration device

Abstract

To properly conduct a test of vibration on a test target material.SOLUTION: A vibration device 10 is for conducting a test of vibration on a test target object 1 by vibrating the object 1. The vibration device 10 includes a table 13, which is vibrated by driving force from a vibration device body 12, and a jig connected to the table 13. The jig is fixed to a fixation unit 22 to which the object 1 is fixed. The length from one end to another end in an X-axial direction of the fixation unit 22 is longer than from one end to another end in an X-axial direction of the table 13.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a vibration device. [Background technology]

[0002] 2. Description of the Related Art There is known an apparatus for performing a test (vibration test) in which vibration is applied to a test object for the purpose of investigating vibration response or the like (for example, Patent Document 1). Patent Document 1 describes an apparatus equipped with a vibration mechanism connected to a specimen in order to apply a displacement and a load to the specimen. The vibration mechanism has a displacement / load transmission mechanism connected to the specimen, and a plurality of vibration exciters connected to the displacement / load transmission mechanism. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 3418667 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, for example, an object transported by truck or the like may be damaged by vibrations and shocks caused by bumps in the road surface or by the truck bouncing around during transport. For this reason, in the product development process of an object, a vibration test using a vibration test device may be performed to check whether the object has a strength sufficient to prevent damage during transport. As an example of vibration test device, there is a device that performs the test by placing an object to be subjected to vibration test (hereinafter referred to as "test object") on a table and vibrating the table.

[0005] When testing a long test object with such an apparatus, the test object may protrude from the table. In this case, since it is not possible to fix the part of the test object protruding from the table to the table, the test object is fixed to the table by the part of the test object placed on the table. In other words, there are restrictions on the fixing point of the test object. For this reason, the fixing point during testing may differ from the fixing point when the test object is actually transported. If the fixing point between the test object and the table differs from the fixing point when the test object is actually transported, there is a possibility that the vibration test of the test object cannot be performed appropriately.

[0006] The present disclosure has been made in consideration of the above circumstances, and has an object to provide a vibration excitation device that can appropriately perform vibration testing on a test object. [Means for solving the problem]

[0007] In order to solve the above problems, the vibration device of the present disclosure employs the following measures. A vibration device according to one aspect of the present disclosure is a vibration device that vibrates a test object to perform a vibration test of the test object, and includes a vibration part that vibrates due to a driving force from a vibration part, and a jig connected to the vibration part, the jig having a fixing part to which the test object is fixed, and the length of the fixing part from one end to the other end in one direction is longer than the length of the vibration part from one end to the other end in the one direction. Effect of the Invention

[0008] According to the present disclosure, vibration testing can be appropriately performed on a test object. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a front view showing a vibration device according to a first embodiment of the present disclosure. [Diagram 2] FIG. 2 is a front view showing a stand provided in the vibration device of FIG. [Diagram 3] FIG. 11 is a front view of a vibration device according to a second embodiment of the present disclosure. [Figure 4] FIG. 11 is a plan view of a vibration device according to a second embodiment of the present disclosure. [Diagram 5] FIG. 4 is a cross-sectional view taken along the line AA in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of a vibration device 10 according to the present disclosure will be described with reference to the drawings. In the following explanation and drawings, the vertical direction is referred to as the Z-axis direction, the horizontal direction in which the test object 1 extends (longitudinal direction) is referred to as the X-axis direction, and the direction perpendicular to the Z-axis direction and the X-axis direction (short side direction of the test object 1) is referred to as the Y-axis direction.

[0011] In the following embodiment, a vibration test is performed by applying vibration to a test object 1 using a vibration excitation device 10. The test object 1 is, for example, an elongated member that is long in one direction (in this embodiment, as an example, the X-axis direction). Specifically, the test object 1 may be, for example, a box in which a flying object is stored when it is transported. Furthermore, the test object 1 may be a storage box alone, or a storage box that stores a flying object. The length of the test object 1 in the X-axis direction is, for example, 2 m or more. The weight of the test object 1 is heavier than the maximum load weight of a typical conductive vibration exciter, for example, 2 t or more.

[0012] [First embodiment] A vibration device 10 according to a first embodiment of the present disclosure will be described below with reference to Fig. 1 and Fig. 2. The vibration device 10 according to this embodiment vibrates a test object 1 in a vertical up-down direction (Z-axis direction). That is, in this embodiment, a vibration test is performed by vibrating the test object 1 in a vertical up-down direction.

[0013] As shown in FIG. 1, the vibration device 10 includes a vibration device 11, a jig 20 connected to the vibration device 11, and a stand 30 supporting the jig 20 from below. The test object 1 is fixed to the jig 20. The vibration device 10 of this embodiment is erected on the ground 2. In detail, the stand 30 is fixed to a flat portion 2a of the ground 2 with anchor bolts or the like, and the vibration device 11 is placed on the bottom surface of a recess 2b recessed downward from the flat portion 2a. The test object 1 is fixed to the vibration device 10 at two fixing points (fixing points P1 and P2) spaced apart in the X-axis direction. In this embodiment, the positions (fixing points P1 and P2) at which the test object 1 is fixed to the vibration device 10 (in detail, a fixing member 22a described later) are the same positions as the positions at which the test object 1 is fixed when the test object 1 is transported by a transport vehicle such as a truck after the test.

[0014] The vibration device 11 has a vibration device main body (vibration unit) 12 placed on the ground 2, and a table (vibration unit) 13 arranged above the vibration device main body 12. The vibration device 11 is a so-called conductive type vibrator (electromagnetic vibrator), and electrically vibrates the table 13 in the Z-axis direction.

[0015] The vibration device main body 12 is placed on the bottom surface of the recess 2b of the ground 2. The vibration device main body 12 vibrates the table 13 by electricity. The table 13 is a flat plate-shaped member. The bottom surface of the table 13 is connected to the vibration device main body 12. The table 13 vibrates in the Z-axis direction by the driving force from the vibration device main body 12. The length of the table 13 in the X-axis direction and the length of the table 13 in the Y-axis direction are similar to those of the table 13 in a general conductive type vibrator that vibrates in the Z-axis direction, and are, for example, approximately 50 cm.

[0016] The jig 20 has a connecting portion 21 that connects to the table 13 , a fixing portion 22 that fixes the object to be inspected, and a main body portion 23 that connects to the stand 30 .

[0017] The upper end of the connecting part 21 is fixed to the main body part 23. The connecting part 21 and the main body part 23 are fixed, for example, by a plurality of bolts (not shown). The lower end of the connecting part 21 is fixed to the upper surface of the table 13. The connecting part 21 and the table 13 are fixed, for example, by a plurality of bolts (not shown). The connecting part 21 and the table 13 are fixed so that the weight of the jig 20 does not act on the table 13. The weight of the jig 20 acts on the frame 30 via an air spring 33, which will be described later.

[0018] The fixing portion 22 has a plurality of fixing members 22a (two, in this embodiment, as an example) provided at the upper end of the main body portion 23. Each fixing member 22a fixes the test subject 1. The two fixing members 22a are arranged side by side along the X-axis direction. The fixing members 22a are arranged at a distance from each other. The distance between the fixing portions 22 is set to L1 in this embodiment. That is, in this embodiment, the length from one end to the other end of the fixing portion 22 in the X-axis direction is set to length L1. The length L1 of the fixing portion 22 in the X-axis direction (one direction) is longer than the length L2 of the table 13 in the X-axis direction. The embodiment of the fixing portion 22 is not limited to the embodiment described above. For example, the fixing portion 22 may have two or more fixing members 22a. Also, the fixing portion 22 may have a single fixing member 22a extending in the X-axis direction.

[0019] The main body 23 has an outer frame 23a which is a trapezoidal frame when viewed from the front, and a plurality of jig vertical portions 23b which connect the upper and lower portions of the outer frame 23a. A plurality of fixing members 22a are provided on the upper part of the outer frame. Air springs 33, which will be described later, are fixed to the lower part of the outer frame via jig brackets 23c. Moving parts 16 of linear guides 14, which will be described later, are provided on main body 23.

[0020] As shown in FIGS. 1 and 2, the mount 30 has a base 31 fixed to the ground 2 and a plurality of pillars 32 extending upward from the upper end of the base 31. The base 31 is placed on the ground 2 (specifically, the flat portion 2a) so as to straddle the recess 2b. The base 31 has a plurality of column-shaped frame vertical portions 31a standing on the ground 2, and a horizontal portion 31b connecting the frame vertical portions 31a to each other. The lower ends of the frame vertical portions 31a are fixed to the ground 2 by a plurality of anchor bolts (not shown). In addition, an air spring 33, which will be described later, is fixed to the upper ends of the frame vertical portions 31a.

[0021] Each pillar portion 32 extends upward from the upper surface of the horizontal portion 31b. The multiple pillar portions 32 (two pillar portions in this embodiment) are arranged side by side at a predetermined interval along the X-axis direction. A rail portion 15 of the linear guide 14, which will be described later, is fixed to the side surface of the pillar portions 32.

[0022] The main body 23 of the jig 20 and the base 31 of the stand 30 are connected via an air spring 33. That is, by using the air spring 33, the stand 30 supports the jig 20 from below while allowing the jig 20 to vibrate (vibration in the Z-axis direction).

[0023] The base 30 and the vibration device 11 are connected via a jig 20. In other words, the base 30 and the vibration device 11 are not directly connected.

[0024] 1, the jig 20 and the mount 30 are engaged by the linear guide (regulating portion) 14. The linear guide 14 allows relative movement of the jig 20 with respect to the mount 30 in the Z-axis direction. That is, the linear guide 14 allows relative movement of the jig 20 with respect to the mount 30 in the vibration direction. In addition, the linear guide 14 regulates relative movement of the jig 20 with respect to the mount 30 in the X-axis direction and the Y-axis direction.

[0025] The linear guide 14 has a rail portion 15 (see FIG. 2) fixed to a side surface of the pillar portion 32 of the stand 30, and a moving portion 16 fixed to the main body portion 23 of the jig 20. The rail portion 15 extends in the Z-axis direction. The moving portion 16 is engaged with the rail portion 15 and is movable in the Z-axis direction along the rail portion 15. The rail portion 15 and the moving portion 16 are engaged with each other so as to restrict relative movement in the X-axis and Y-axis directions.

[0026] Next, a method for performing a vibration test on the test object 1 using the vibration device 10 of this embodiment will be described. When performing a vibration test, first, the long test object 1 is fixed to the fixing portion 22 of the jig 20. At this time, the positions (fixing points P1 and P2) where the test object 1 is fixed to the fixing portion 22 (specifically, the fixing member 22a) are the same as the positions where the test object 1 is fixed when the test object 1 is transported by a transport vehicle such as a truck after the test. After the test object 1 is fixed, the vibration device 11 is operated. When the vibration device 11 is operated, the vibration device 11 vibrates the table 13 in the vertical direction (Z-axis direction). Since the table 13 is connected to the jig 20 (more specifically, the connecting portion 21), the vibration of the table 13 also vibrates the jig 20. This allows the test object 1 fixed to the jig 20 to also vibrate in the vertical direction (Z-axis direction). In this manner, a vibration test of the test object 1 in the Z-axis direction can be performed. The jig 20 is supported on the stand 30 by air springs 33. Therefore, a force acts on the jig 20 to move it in directions intersecting the Z-axis direction (X-axis direction and Y-axis direction) due to vibration from the vibration device 11, but in this embodiment, the linear guide 14 restricts the relative movement between the jig 20 and the stand 30 in the X-axis direction and the Y-axis direction. As a result, the jig 20 moves (vibrates) only in the vertical direction.

[0027] According to this embodiment, the following advantageous effects are obtained. In this embodiment, the jig 20 is connected to the table 13. As a result, vibration from the vibration device main body 12 is input to the jig 20. In other words, the jig 20 is vibrated via the table 13 by the driving force from the vibration device main body 12. Also, in this embodiment, the length in the X-axis direction of the fixing portion 22 to which the test object 1 is fixed is longer than the length in the X-axis direction of the table 13. As a result, the range in which the test object 1 can be fixed to the fixing portion 22 (the range in which fixing points can be provided) can be made longer in the X-axis direction in comparison with the case where the test object 1 is fixed to the table 13. That is, when the test object 1 is fixed at multiple points, the test object 1 can be fixed to the fixing portion 22 at multiple points that are farther apart in the X-axis direction. Therefore, the test object 1 can be fixed at a more appropriate position, and therefore the vibration test can be performed appropriately on the test object 1. In this embodiment, the positions (fixing points P1 and P2) where the test object 1 is fixed to the vibration device 10 are the same as the positions where the test object 1 is fixed when the test object 1 is transported by a transport vehicle such as a truck after the test. This allows the vibration experiment to be performed in the same fixing manner as when the test object 1 is actually transported by the transport vehicle, so that the vibration test can be performed more appropriately assuming the time of transportation.

[0028] Moreover, if an excessive weight acts on the table 13, it may be impossible to perform a vibration test because the driving force of the vibration device main body 12 cannot generate vibrations. There is also a risk that the table 13 and the vibration device main body 12 may be damaged. On the other hand, in this embodiment, a stand 30 is provided that supports the jig 20 from below. As a result, the weight of the jig 20 and the test object 1 fixed to the jig 20 acts on the stand 30. Therefore, the weight acting on the table 13 can be reduced. As a result, the range of weight that can be tested can be expanded, and vibration tests can be performed on test objects 1 that are heavy. Further, the mount 30 supports the jig 20 via an air spring 33. Therefore, the mount 30 can support the jig 20 without interfering with the vibration of the jig 20.

[0029] Furthermore, in this embodiment, a linear guide 14 is provided that allows relative movement between the stand 30 and the jig 20 in the Z-axis direction (vibration direction) while restricting relative movement in a direction intersecting a predetermined direction. This allows the linear guide 14 to guide the jig 20 in the X-axis direction. Therefore, the jig 20 can be suitably vibrated in the Z-axis direction. Therefore, a vibration test of the test object 1 can be suitably performed.

[0030] Second Embodiment A vibration device according to a second embodiment of the present disclosure will be described below with reference to Figs. 3 to 5. The vibration device according to this embodiment differs from the first embodiment in that the vibration device vibrates the vibration object in the horizontal direction (specifically, the Y-axis direction). That is, in this embodiment, a vibration test is performed by vibrating the test object in the horizontal direction. Accordingly, the structure of the vibration device is partially different from that of the first embodiment. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0031] 3 to 5, the vibration device 40 according to this embodiment includes a vibration device 41, a jig 50 connected to the vibration device 41, and a stand 60 supporting the jig 50 from below. The test object 1 is fixed to the jig 50. As in the first embodiment, the vibration device 40 has a stand 60 fixed to a flat portion 2a of the ground 2 with anchor bolts or the like, and the vibration device 41 placed on the bottom surface of a recess 2b recessed downward from the flat portion 2a.

[0032] As shown in FIGS. 4 and 5, the vibration device 41 has a vibration device main body (vibration unit) 42 placed on the ground 2, and a table (vibration unit) 43 arranged alongside the vibration device main body 42 in the Y-axis direction.

[0033] The table 43 is a flat plate-like member. The end of the table 43 in the Y-axis direction is connected to the vibration device main body 42. The table 43 vibrates in the Y-axis direction by the driving force from the vibration device main body 12. The length of the table 43 in the X-axis direction and the length of the table 43 in the Y-axis direction are similar to those of the table 13 in a general conductive type vibrator that vibrates in the Y-axis direction, and are, for example, approximately 120 cm.

[0034] The jig 50 has a bracket 51 that connects to the table 43 , a fixing portion 52 that fixes the object to be inspected, and a main body portion 53 that connects to the stand 60 . As shown in Fig. 5, the side end of the bracket 51 is fixed to the main body 53. The bracket 51 and the main body 53 are fixed by, for example, a plurality of bolts 51a. The lower end of the bracket 51 is fixed to the upper surface of the table 43. The bracket 51 and the table 43 are fixed so that the weight of the jig 50 does not act on the table 43. The weight of the jig 50 acts on the stand 60 via a linear guide 44 (see Fig. 3), which will be described later. The fixed portion 52 has a plurality of fixed members 22a. The structure of the fixed portion 52 is substantially the same as that of the fixed portion 22 of the first embodiment, and therefore detailed description thereof will be omitted. The length L3 (see FIG. 3) of the fixed portion 52 in the X-axis direction (one direction) is longer than the length L4 (see FIG. 4) of the table 43 in the X-axis direction.

[0035] The main body 53 extends in the X-axis direction. A moving portion 46 of the linear guide 44 is provided on the lower surface of the main body 53.

[0036] Two mounts 60 are provided. The two mounts 60 are arranged side by side along the X-axis direction with the recess 2b in between. One mount 60 supports one end of the main body 53 in the X-axis direction from below. The other mount 60 supports the other end of the main body 53 in the X-axis direction from below. The lower end of the mount 60 is fixed to the ground 2 by a plurality of anchor bolts (not shown). A rail portion 45 of a linear guide 44, which will be described later, is fixed to the upper end of the mount 60.

[0037] The main body 53 of the jig 50 is supported on a stand 60 via a linear guide 44. The stand 60 supports the jig 50 from below via the linear guide 44 while allowing vibration of the jig 50 (vibration in the Y-axis direction).

[0038] The jig 50 and the base 60 are engaged with each other via a linear guide (regulating portion) 44. The linear guide 44 allows relative movement of the jig 50 with respect to the base 60 in the Y-axis direction. In other words, the linear guide 44 allows relative movement of the jig 50 with respect to the base 60 in the vibration direction. In addition, the linear guide 44 regulates relative movement of the jig 50 with respect to the base 60 in the X-axis direction.

[0039] As shown in FIG. 3, the linear guide 44 has a rail portion 45 fixed to the upper surface of the stand 30 and a moving portion 46 fixed to a main body portion 53 of the jig 50. The rail portion 45 extends in the Y-axis direction. The moving portion 46 is engaged with the rail portion 45 and is movable in the Y-axis direction along the rail portion 45. The rail portion 45 and the moving portion 46 are engaged with each other so as to restrict relative movement in the X-axis direction.

[0040] A method for performing a vibration test on the test object 1 using the vibration excitation device 40 of this embodiment is substantially similar to the method for performing the vibration test described in the first embodiment, so detailed descriptions of similar steps will be omitted. The vibration device 41 of the present embodiment vibrates the table 43 in the Y-axis direction. Accordingly, the jig 50 and the test object 1 fixed to the jig 50 also vibrate in the Y-axis direction. In this manner, a vibration test of the test object 1 in the Y-axis direction can be performed. The jig 50 is supported on the mount 60 via a linear guide 44. Therefore, the linear guide 44 restricts the relative movement between the jig 50 and the mount 60 in the X-axis direction. Furthermore, the relative movement between the jig 50 and the mount 60 in the Z-axis direction is restricted by gravity. Therefore, the jig 50 and the test object 1 move (vibrate) only in the Y-axis direction.

[0041] This embodiment also provides the same effects as the first embodiment.

[0042] The present disclosure is not limited to the invention according to the above-described embodiments, and various modifications are possible without departing from the spirit and scope of the present disclosure. For example, the shape of the test object 1 is not limited to the shapes described in the above embodiments. In addition, the vibration device described in the first and second embodiments may be manufactured by using a general conductive type vibration exciter as the vibration device described above and attaching a jig and a stand to the conductive type vibration exciter.

[0043] The vibration device according to the embodiment described above can be understood, for example, as follows. A vibration device according to one embodiment of the present disclosure is a vibration device (10) that vibrates a test object (1) to perform a vibration test of the test object (1), and includes a vibration section (13) that vibrates due to a driving force from a vibration section (12) and a jig (50) connected to the vibration section (13), wherein the jig (50) has a fixing section (22) to which the test object (1) is fixed, and the length from one end to the other end of the fixing section (22) in one direction (X-axis direction) is longer than the length from one end to the other end of the vibration section (13) in the one direction (X-axis direction).

[0044] In the above configuration, the jig is connected to the vibration unit. As a result, vibration from the vibration unit is input to the jig. In other words, the jig vibrates via the vibration unit due to the driving force from the vibration unit. Also, in the above configuration, the length in one direction of the fixing unit to which the test object is fixed is longer than the length in one direction of the vibration unit. As a result, the range in the test object that can be fixed to the fixing unit can be made longer in one direction compared to the case where the test object is fixed to the vibration unit. That is, when the test object is fixed at multiple points, the test object can be fixed to the fixing unit at multiple points that are more distant in one direction. Therefore, the test object can be fixed at a more appropriate position, and therefore the vibration test can be performed appropriately on the test object. Note that the appropriate fixing position is, for example, a fixing position that is the same as or close to the fixing position when actually used.

[0045] Moreover, the vibration device according to one embodiment of the present disclosure includes a stand (30) that supports the jig (50) from below so as to allow vibration of the jig (50).

[0046] If an excessive weight acts on the vibrating part, it may not be possible to generate vibrations using the driving force of the vibrating part, making it impossible to perform the vibration test, and there is also a risk of the vibrating part or the vibrating part being damaged. On the other hand, the above configuration includes a stand that supports the jig from below. As a result, the weight of the jig and the test object fixed to the jig acts on the stand. This reduces the weight acting on the vibration unit. This widens the range of weight that can be tested, making it possible to perform vibration tests on heavy test objects.

[0047] In addition, in one embodiment of the vibration device of the present disclosure, the vibration section (13) vibrates in a predetermined direction (Z-axis direction) and is provided with a regulating section (14) that allows relative movement between the stand (30) and the jig (50) in the predetermined direction (Z-axis direction) while regulating relative movement in a direction intersecting the predetermined direction (Z-axis direction).

[0048] The above configuration includes a restricting portion that allows relative movement between the stand and the jig in a predetermined direction (vibration direction) while restricting relative movement in a direction intersecting the predetermined direction. This allows the restricting portion to guide the jig in the predetermined direction. Therefore, the jig can be preferably vibrated in the predetermined direction. Therefore, vibration testing of the test object can be preferably performed.

[0049] In addition, in the vibration device according to one embodiment of the present disclosure, the direction in which the vibration portion (13) vibrates is the vertical up-down direction. With the above configuration, a vibration test in the vertical direction can be appropriately performed on the test object.

[0050] In addition, in the vibration device according to one embodiment of the present disclosure, the direction in which the vibration portion (13) vibrates is the horizontal direction. With the above configuration, a horizontal vibration test can be appropriately performed on the test object. [Explanation of symbols]

[0051] 1: Test object 2: Ground 2a: Flat part 2b: Recess 10: Vibration device 11: Vibration device 12: Vibration device body (excitation part) 13: Table (vibration part) 14: Linear guide (regulating part) 15: Rail section 16: Moving part 20: Jig 21:Connection part 22:Fixed part 22a: Fixing member 23: Main body 23a: Outer frame 23b: Vertical part of jig 23c: Jig bracket 30: Stand 31: Base 31a: Vertical part of the stand 31b:Horizontal part 32:Column part 33: Air spring 40: Vibration device 41: Vibration device 42: Vibration device body 43: Table 44: Linear guide 45: Rail section 46: Moving part 50: Jig 51: Bracket 51a: Bolt 52:Fixed part 53: Main body 60: Stand P1: Fixed point P2 :Fixed point

Claims

1. A vibration device for vibrating a test object to perform a vibration test of the test object, a vibration part that vibrates by a driving force from a vibration part; A jig connected to the vibration unit, The jig is installed side by side along one direction on the upper surface of the jig, has a shape protruding upward from the upper surface of the jig, and has two fixing portions to which the test object is fixed, A vibration device in which the distance between the two fixed parts is longer than the length from one end to the other end of the vibration part in one direction.

2. 2. The vibration device according to claim 1, further comprising a stand for supporting the jig from below so as to allow the jig to vibrate.

3. The vibration unit vibrates in a predetermined direction, 3. The vibration device according to claim 2, further comprising a restricting portion that allows relative movement between the base and the jig in the predetermined direction and restricts relative movement between the base and the jig in a direction intersecting the predetermined direction.

4. 4. The vibration device according to claim 1, wherein the vibration portion vibrates in a vertical direction.

5. 4. The vibration device according to claim 1, wherein the vibration portion vibrates in a horizontal direction.

Images