JP2009243628A - Spring with freely-settable-spring-constant, and vibrator support device using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spring with a freely-settable-spring-constant allowing easy setting of a desired spring constant in a desired direction, and a vibrator support device using it. <P>SOLUTION: This device is formed of a solid material 1 having an elastic characteristic, and a groove 3 is provided on the solid material 1. The groove 3 penetrates through the solid material 1 in the direction crossing the depth direction of the groove 3 and the groove 3 extending direction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a spring capable of freely setting a spring constant and a vibrating body support device using the spring.

  When vibrating or vibrating a vibrating body such as a mechanical device or when extracting the natural frequency of the vibrating body, the vibrating body may be supported via a spring set to an appropriate spring constant. Necessary. The device that supports the vibrating body through the spring in this way is a vibrating body support device. For example, it is necessary to combine a plurality of springs in order to adjust the support rigidity and vibration characteristics of the vibrating body support device with respect to the horizontal XY direction, the vertical Z direction, and the torsion direction. For example, a spring is provided on each of the three axes so that a soft spring is used in the horizontal XY direction and a hard spring is used in the vertical Z direction.

The vibration isolation of the vibrating body is described in, for example, Patent Documents 1 and 2 below.
JP 05-133432 A Japanese Patent Application Laid-Open No. 09-079319

However, it has been impossible to set a desired spring constant freely in each axial direction by a simple method.
In addition, when setting the spring constant independently for each of the three axes, in order to eliminate the influence of the springs of the other axes, for example, when the vibrating body is supported by a spring in the X-axis direction, this spring It is necessary to further provide a linear motion mechanism that prevents displacement in directions other than the X direction. Therefore, there are problems that the number of parts increases and the structure becomes complicated. Further, in order to adjust the rigidity / vibration characteristics in the torsional direction, the structure is further complicated, such as arranging the spring in the torsional direction (oblique direction).

  Accordingly, an object of the present invention is to easily set a desired spring constant in a desired direction and to eliminate the above-described linear motion mechanism, and a spring using the spring constant that can be set. The object is to provide a body support device.

  In order to achieve the above object, according to the present invention, the solid material is formed of a solid material having elastic characteristics, and the solid material is provided with a groove, and the groove is in a direction intersecting the depth direction of the groove. Thus, there is provided a spring having a spring constant settable, wherein the spring penetrates the solid material in a direction in which the groove extends.

The spring capable of setting the spring constant of the present invention is formed of a solid material having elastic characteristics, and the solid material is provided with a groove, the groove being in a direction intersecting the depth direction thereof, Since the solid material penetrates in the direction in which the groove extends, the relative position between one end and the other end of the spring in the depth direction of the groove can be changed by changing the solid material, the width of the groove, and the depth of the groove. Arbitrary spring constants can be set for displacement and relative vibration. Further, in the direction perpendicular to the depth direction of the groove, the spring constant is high and the displacement amount can be made small or hardly.
Therefore, it is possible to easily set a desired spring constant in a desired direction by adjusting the solid material, the width of the groove, the depth of the groove, and the direction in which the groove is inserted. In addition, since only the groove is formed in the solid material, when the vibrating body is supported by the above-described spring, the amount of displacement of the spring should be small or hardly except in the direction in which the spring constant is adjusted by the groove. Therefore, it is possible to eliminate the above-described linear motion mechanism. The spring constant in the depth direction of the groove may be adjusted by adjusting the number of grooves.

  According to a preferred embodiment of the present invention, the groove is slit-shaped.

  Thus, since the groove has a slit shape, the spring can be manufactured by a simple process of slitting a solid material.

  According to a preferred embodiment of the present invention, the first and second grooves are formed as the grooves, the first and second grooves are inserted from directions intersecting each other, and the first and second grooves are formed. The grooves are provided at intervals in a direction perpendicular to the direction in which these grooves are inserted.

  As described above, the first and second grooves are formed as the grooves, the first and second grooves are inserted from directions that intersect (different) each other, and the first and second grooves are Since they are provided at intervals in a direction perpendicular to the direction in which they are inserted, the degree of the spring constant in the direction in which the first groove is inserted (that is, in the depth direction of the groove) is determined according to the solid material, the first The width of the groove and the depth of the first groove can be adjusted, and the degree of the spring constant in the direction of inserting the second groove depends on the solid material, the width of the second groove, the depth of the second groove. The spring constant in two directions can be arbitrarily set. Thereby, it is possible to realize a two-dimensional spring in which the spring constant can be freely set. Preferably, the first and second grooves are inserted from directions orthogonal to each other. Thereby, it is possible to set the spring constant independently of each other in each direction or by significantly reducing the influence of the spring constant in the other direction in each direction.

  According to a preferred embodiment of the present invention, first and second grooves are formed as the grooves, and the first and second grooves are inserted from opposite directions, and the first and second grooves are formed. The grooves are provided at intervals in a direction perpendicular to the direction in which the grooves are inserted.

  As described above, the first and second grooves are formed as the grooves, the first and second grooves are inserted from opposite directions, and the first and second grooves are Since the first and second grooves are provided at intervals in a direction perpendicular to the insertion direction, a substantially S-shaped portion can be formed in the solid material (see FIG. 3A described later, FIG. 5), this makes it possible to provide vibration characteristics in a direction perpendicular to the direction in which the first and second grooves are inserted, although the amount of displacement is relatively small. In this case, the vibration characteristics in the direction perpendicular to the direction in which the first and second grooves are inserted are adjusted by adjusting the number of first and second grooves (that is, the number of substantially S-shaped portions). it can.

  According to a preferred embodiment of the present invention, the curvature of the line representing the cross-sectional shape of the bottom of the groove changes continuously throughout.

  Since the curvature of the line representing the cross-sectional shape of the bottom portion of the groove continuously changes throughout, it is possible to avoid stress concentration in one place due to the displacement of the spring, thereby improving the durability of the spring. Can be increased.

  Preferably, the cross-sectional shape is a substantially arc shape.

  Since the cross-sectional shape is a substantially arc shape, the stress due to the displacement of the spring can be more effectively distributed, and the durability of the spring can be further enhanced.

  Further, according to the present invention, one end portion of the above-described spring is coupled to the vibration body, and the other end portion of the spring is coupled to the support body, whereby the vibration body is supported by the support body via the spring. Thus, a vibrating body supporting device is provided.

  In this way, one end of the above-described spring is coupled to the vibrating body, and the other end of the spring is coupled to the support body, so that the vibrating body is supported by the support body via the spring. Therefore, a desired spring constant can be set in a desired direction with respect to relative displacement / relative vibration of the vibrating body with respect to the support. That is, the spring constant can be set in the depth direction of the groove, and the degree thereof can be easily adjusted by the solid material, the width of the groove, and the depth of the groove.

  According to a preferred embodiment of the present invention, in the vibrating body support device, the springs are provided at a plurality of positions spaced apart from each other.

  As described above, since the springs are provided at a plurality of positions at intervals, a vibrating body support device having a five-dimensional vibration mode in which vibration characteristics can be freely set can be realized. For example, the five-dimensional vibration mode of the vibrating body support device can be obtained as follows. The direction of the interval is defined as the left-right direction (corresponding to the left-right direction in FIG. 6 described later), and the direction orthogonal to the left-right direction and orthogonal to the direction of the interval between the vibrating body and the support is illustrated in FIG. (Corresponding to a direction perpendicular to the paper surface), the vibration characteristic (primary mode) of the vibrating body supporting device in the left-right direction is determined by the grooves (grooves 3b, 3c in the example of FIG. 6) inserted in the left-right direction. The vibration characteristics (secondary mode) of the vibrating body supporting device with respect to the front-rear direction are given by grooves (grooves 3a, 3d in the example of FIG. 6) inserted in the front-rear direction, The vibration characteristic (tertiary mode) of the vibrating body supporting device with respect to the vertical direction is such that the substantially S-shaped portion described above is formed by the grooves (grooves 3b and 3c in the example of FIG. 6) inserted in the left-right direction or the front-rear direction. Given in the said longitudinal direction The vibration characteristics (quaternary mode) of the vibrating body supporting device with respect to the rotation direction around the center axis (roll axis) facing the above-described springs (more specifically, in the example of FIG. (Forms the above-described substantially S-shaped portion with the spring grooves 3b and 3c) and supports the vibrating body in the rotational direction around the central axis (yaw axis) oriented in the left-right direction and the direction perpendicular to the front-rear direction The vibration characteristics (fifth-order mode) of the apparatus are given by the springs (more specifically, in the example of FIG. 6, the grooves 3a to 3d of the springs 10) that are spaced apart in the left-right direction. When the above-described substantially S-shaped portion is not formed, the third-order mode and the fourth-order mode are vibration modes having a high spring constant.

  According to a preferred embodiment of the present invention, in the vibrating body support device, the pair of springs spaced in the predetermined left-right direction are provided at two locations in the front-rear direction orthogonal to the left-right direction. .

  As described above, the pair of springs spaced in the predetermined left-right direction are provided at two positions in the front-rear direction orthogonal to the left-right direction, so that the vibration characteristics can be freely set. A vibrating body support device having a mode can be realized. That is, a six-dimensional vibration mode is obtained by adding a one-dimensional vibration mode to the above-described five-dimensional vibration mode. The newly obtained vibration mode is the vibration characteristic (sixth-order mode) of the vibrating body support device with respect to the rotational direction around the central axis (pitch axis) facing the left-right direction (see FIG. 7A). The vibration mode is the above-described springs spaced apart in the front-rear direction (more specifically, in the example of FIG. 7A, the above-described substantially S-shaped portions are formed by the grooves 3b and 3c of the springs). Given by. In addition, when the above-described substantially S-shaped portion is not formed, the sixth-order mode is a vibration mode having a high spring constant.

  For convenience of explanation, in the above description, the left-right or front-rear direction groove has been described as an example. However, according to the present invention, the above-described left-right direction groove is changed to a slanted direction with respect to the left-right direction. Instead, the vibration characteristics of the above-described five-dimensional mode or six-dimensional mode can be obtained even if the groove that is inserted in the front-rear direction is replaced with a groove that is inclined with respect to the front-rear direction.

  According to the above-described present invention, a desired spring constant can be easily set in a desired direction, and the above-described linear motion mechanism can be eliminated.

  The best mode for carrying out the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the common part in each figure, and the overlapping description is abbreviate | omitted.

  FIG. 1 is a view showing a spring whose spring constant can be set according to the first embodiment of the present invention. 1A is a view taken along the line 1A-1A in FIG. 1B, FIG. 1B is a view taken along the line 1B-1B in FIG. 1A, and FIG. It is a 1C-1C line arrow directional view of Drawing 1 (A). The spring 10 according to the first embodiment is formed of a solid material 1 having elastic characteristics, and the solid material 1 is provided with a groove 3, which intersects the depth direction of the groove 3 (see FIG. The solid material 1 is penetrated in a direction orthogonal to the example 1 and in a direction in which the groove 3 extends. In the example of FIG. 1, the groove 3 has a slit shape.

  The solid material 1 may be a metal or a resin having a predetermined shape, and is preferably a material whose material properties (Young's modulus, specific gravity, etc.) are known in advance. In FIG. 1, the solid material 1 has a quadrangular prism shape whose cross section is a positive direction or a rectangle. However, according to the present invention, the solid material 1 may have another prism shape, a cylindrical shape, or a rod shape. Other suitable shapes may be used.

  FIG. 2 is a diagram showing displacement by the spring 10 of FIG. The arrow in FIG. 2 indicates the amount of spring displacement in the direction in which the groove 3 is inserted (that is, the depth direction of the groove 3). As indicated by the arrow, the spring constant in the direction in which the groove 3 is inserted can be easily adjusted by the width of the groove 3 and the depth of the groove 3. In the present application, the direction in which the groove 3 is inserted refers to the depth direction of the groove 3.

  In the example of FIG. 1, the cross-sectional shape of the bottom of the groove 3 is a substantially arc shape. This cross-sectional shape is a cross-sectional shape parallel to the paper surface of FIG. According to this invention, the said cross-sectional shape of the bottom part of the groove | channel 3 is not limited to this, The curvature should just change continuously over the whole. Thereby, the stress acting on the bottom of the groove 3 when the spring 10 is deformed can be dispersed.

The spring 10 according to the above-described embodiment of the present invention is formed of the solid material 1 having elastic characteristics, and the solid material 1 is provided with a groove 3, and the groove 3 intersects the depth direction thereof. Since the solid material 1 penetrates in the direction in which the groove 3 extends, the spring 10 in the depth direction of the groove 3 can be changed by changing the solid material, the width of the groove 3, and the depth of the groove 3. An arbitrary spring constant can be set with respect to the relative displacement / relative vibration between one end and the other end. Further, in the direction orthogonal to the depth direction of the groove 3, the spring constant is high and the amount of displacement can be made small or almost absent.
Therefore, it is possible to easily set a desired spring constant in a desired direction by adjusting the solid material 1, the width of the groove 3, the depth of the groove 3, and the direction in which the groove 3 is inserted. Further, since only the groove 3 is put in the solid material 1, when the vibrating body 5 is supported by the above-described spring 10, the amount of displacement of the spring 10 is other than the direction in which the spring constant by the groove 3 is adjusted. Since it can be made small or almost absent, the above-mentioned linear motion mechanism can be omitted.
Further, since the groove 3 has a slit shape, the spring 10 can be manufactured by a simple process of slitting the solid material 1.

  FIG. 3 is a diagram showing the configuration of the spring 10 according to the second embodiment of the present invention. 3A is a view taken along the line 3A-3A in FIG. 3B, FIG. 3B is a view taken along the line 3B-3B in FIG. 3A, and FIG. It is the 3A-3A arrow directional view of FIG. 3 (A). The spring 10 shown in FIG. 3 differs from the spring 10 shown in FIG. 1 in the number of grooves, but the other configurations may be the same as the spring 10 shown in FIG. 1 described above.

  In the example of FIG. 3, grooves 3 a to 3 d are formed, the grooves 3 a to 3 d are inserted from different directions, and the grooves 3 a to 3 d are spaced apart in a direction perpendicular to the direction in which they are inserted. Is provided. Thus, since the grooves 3a to 3d are inserted from different directions, the degree of the spring constant in the direction of inserting the groove 3a is adjusted by the solid material 1, the width of the groove 3a, and the depth of the groove 3a. The degree of the spring constant in the direction of inserting the groove 3b can be adjusted by the solid material 1, the width of the groove 3b, the depth of the groove 3b, and the degree of the spring constant in the direction of inserting the groove 3c, The solid material 1, the width of the groove 3c, and the depth of the groove 3c can be adjusted, and the degree of the spring constant in the direction of inserting the groove 3d is adjusted by the solid material 1, the width of the groove 3d, and the depth of the groove 3d. It is possible to arbitrarily set spring constants in a plurality of directions (horizontal two directions in FIG. 3). Thereby, it is possible to realize a two-dimensional spring or a three-dimensional spring in which the spring constant can be set. Preferably, as shown in FIG. 3, the grooves 3a, 3d and the grooves 3b, 3c are inserted from directions orthogonal to each other. Thereby, the spring constant can be set for each direction independently of each other.

  In FIG. 3, the groove 3b and the groove 3c are put in the solid material 1 from opposite directions, and the groove 3b and the groove 3c are perpendicular to the direction in which they are put (the vertical direction in FIG. 3). Are provided at intervals. In this way, as shown in FIG. 3 (A), a substantially S-shaped portion can be formed in the solid material 1 by the grooves 3b and 3c, whereby a direction perpendicular to the direction in which the grooves 3b and 3c are inserted. Also in the vertical direction (FIG. 3), the displacement amount is small, but the vibration characteristic can be obtained. This is schematically shown in FIG. In this case, by adjusting the number of grooves 3b and 3c (that is, the number of substantially S-shaped portions), the vibration characteristics in the direction perpendicular to the direction in which the grooves 3b and 3c are inserted can be adjusted. The same applies to the grooves 3a and 3d.

  In the example of FIG. 3, two grooves 3c are provided. Thus, the spring constant in the direction may be adjusted by adjusting the number of grooves put in the same direction.

  Next, the vibrating body support device 20 using the above-described spring 10 of the present invention will be described with reference to FIGS.

FIG. 5 is a configuration example of the vibrating body supporting device 20 according to the embodiment of the present invention.
As shown in FIG. 5, one end portion of the spring 10 is coupled to the vibrating body 5, and the other end portion of the spring 10 is coupled to the support body 7, so that the vibrating body 5 is supported via the spring 10. The body 7 is supported. Accordingly, a desired spring constant can be set in a desired direction with respect to the relative displacement / relative vibration of the vibrating body 5 with respect to the support body 7. That is, the spring constant can be set in the depth direction of the grooves 3a to 3d, and the degree of the spring constant in each direction can be adjusted by the solid material 1, the width of the groove, and the depth of the groove. In the example of FIG. 5, the spring 10 shown in FIG. 3 is arranged. In FIG. 5, the vertical direction is the vertical direction. Note that the spring 10 and the vibrating body 5 and the support body 7 may be coupled by an appropriate coupling means such as a bolt or a screw.

FIG. 6 is another configuration example of the vibrating body supporting device 20 according to the embodiment of the present invention.
In FIG. 6, the springs 10 are provided at a plurality of positions (in this example, two locations) spaced apart in the left-right direction in FIG. Thereby, the vibrating body support device 20 having a five-dimensional vibration mode in which the vibration characteristics of the vibrating body support device 20 can be freely set can be realized. For example, the five-dimensional vibration mode of the vibrating body support device 20 can be obtained as follows. When the grooves 3a to 3d are inserted in the left-right direction and the front-rear direction, respectively, with the direction perpendicular to the paper surface of FIG. 6 as the front-rear direction, the vibration characteristics (primary mode) of the vibrating body support device 20 in the left-right direction are The vibration characteristics (secondary mode) of the vibrating body support device 20 with respect to the front-rear direction are given by the grooves 3a, 3d inserted in the front-rear direction. The vibration characteristics (tertiary mode) of the vibrating body support device 20 in the direction perpendicular to the direction and the front-rear direction are substantially the same as those described above for the grooves (grooves 3b and 3c in the example of FIG. 6) inserted in the left-right direction or the front-rear direction. The vibration characteristic (quaternary mode) of the vibrating body support device 20 with respect to the rotation direction around the central axis (roll axis) facing the front-rear direction is given by forming a letter-shaped portion. A center that is provided by the spring 10 (more specifically, the above-described substantially S-shaped portion is formed by the grooves 3b and 3c of the spring 10) and faces in the left-right direction and the direction perpendicular to the front-rear direction. The vibration characteristics (fifth-order mode) of the vibrating body support device 20 with respect to the rotational direction around the axis (yaw axis) are the springs 10 (more specifically, the grooves 3a to 3 of the springs 10) positioned at intervals in the left-right direction. 3d). In the example of FIG. 6, the springs 10 shown in FIG. 3 are arranged on the left and right so as to be symmetrical. In FIG. 6, the vertical direction is the vertical direction.

FIG. 7 is another configuration example of the vibrating body supporting device 20 according to the embodiment of the present invention. 7A is a view taken along the line 7B-7B in FIG. 7B, and FIG. 7B is a view taken along the line 7A-7A in FIG. 7A.
In FIG. 7, the pair of springs 10 spaced apart in the left-right direction are provided at two locations in the front-rear direction (direction perpendicular to the paper surface of FIG. 7A) perpendicular to the left-right direction. Thereby, the vibrating body support device 20 having a 6-dimensional vibration mode in which the vibration characteristics can be freely set can be realized. That is, a six-dimensional vibration mode is obtained by adding a one-dimensional vibration mode to the five-dimensional vibration mode obtained in FIG. As shown in FIG. 7A, the newly obtained vibration mode is the vibration characteristic (sixth mode) of the vibrating body support device 20 with respect to the rotation direction around the central axis (pitch axis) facing the left-right direction. This vibration mode is given by the spring 10 (more specifically, the above-described substantially S-shaped portion is formed by the grooves 3b and 3c of the spring 10) that are spaced apart in the front-rear direction. In the example of FIG. 7, the pair of left and right springs 10 shown in FIG. In FIG. 7, the vertical direction is the vertical direction.

  In the case of FIGS. 5 to 7, each spring 10 is matched with the vibration characteristics of the vibrating body support device 20 required by the mechanical device (that is, the vibrating body 5) connected to the spring 10 using structural analysis or the like. And the number of springs 10 can be determined. The vibrating body 5 is a rotating machine such as a turbocharger, a turbo compressor, or a gas turbine, and the rotating shaft of the rotating machine has a predetermined operating rotational speed range (for example, 30,000 to 120,000 rpm = 500 Hz to When extracting the vibration characteristics of the rotating machine that is rotating at 2000 Hz), the vibration frequency (natural frequency) of the vibrating body support device 20 (when the rotating machine 5 is not rotating) The spring constant of each spring 10 is set so that it is outside the range of the rotation speed range. In particular, in the case of FIG. 6 and FIG. 7, any frequency (natural frequency) of each of the above modes that the vibrating body support device 20 has is outside the range of the used rotational speed range (preferably, the used rotational speed). The frequency after the seventh mode (natural frequency) is also outside the range of the used rotational speed range (preferably higher than the used rotational speed range). ), The spring constant of each spring 10 is set. Thereby, like the structure of FIGS. 5-7, by installing the rotary machine 5, the vibration characteristic resulting from rotation of the rotary machine 5 can be extracted and measured accurately.

  The present invention is not limited to the above-described embodiment, and various changes can be made without departing from the scope of the present invention.

  The spring 10 may be provided with grooves 3, 3a to 3d by machining the solid material 1 prepared in advance. When the solid material 1 is molded, the shape corresponding to the grooves 3, 3a to 3d is used. It is also possible to mold the solid material 1 having the grooves 3, 3a to 3d, that is, the spring 10, by molding using a mold having Therefore, the spring 10 may be a casting molded in this way.

In each embodiment mentioned above, groove | channel 3, 3a-3d puts groove | channel 3, 3a-3d from the direction orthogonal to this longitudinal direction with respect to the solid material 1 extended in a longitudinal direction (up-down direction of each figure). However, according to the present invention, the solid material 1 may be grooved from a direction oblique to the longitudinal direction. Thereby, regarding the relative displacement / relative vibration between the one end and the other end of the solid material 1 in each of the above-mentioned drawings, the spring constant of the solid material 1 in the longitudinal direction and the diagonal direction is determined as the solid material 1 and the width of the groove. The depth of the groove can be adjusted.
Accordingly, in each of FIGS. 1 to 7, the groove that is inserted in the left-right direction is replaced with the groove that is inclined in the left-right direction, and the groove that is inserted in the front-rear direction is changed in the direction oblique to the front-back direction You may replace with the groove | channel put in. Even in this case, the vibration characteristics of the above-described five-dimensional mode or six-dimensional mode are obtained in FIGS.

It is a figure which shows the spring which can set a spring constant by 1st Embodiment of this invention, (A) is the 1A-1A arrow line view of (B), (B) is the 1B-1B line of (A). It is an arrow view, (C) is a 1C-1C line arrow view of (A). It is a figure which shows the elastic deformation of the spring of FIG. It is a figure which shows the spring which can set a spring constant by 2nd Embodiment of this invention, (A) is the 3A-3A line arrow view of (B), (B) is the 3B-3B line of (A). It is an arrow view, (C) is a 3C-3C line arrow view of (A). It is a figure which shows the deformation | transformation of the spring by a S-shaped part. It is a figure which shows the structural example of the vibrating body support apparatus using the spring of this invention. It is a figure which shows another structural example of the vibrating body support apparatus using the spring of this invention. It is a figure which shows another structural example of the vibrating body support apparatus using the spring of this invention, (A) is a 7B-7B arrow directional view of (B), (B) is 7A- of (A). It is a 7A line arrow directional view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Solid material, 3, 3a-3d ... Groove, 5 ... Vibration body, 7 ... Support body, 10 ... Spring, 20 ... Vibration body support apparatus

Claims (9)

  The solid material is formed of a solid material having elastic characteristics, and the solid material is provided with a groove, and the groove penetrates the solid material in a direction that intersects the depth direction of the groove and extends. A spring with adjustable spring constant, characterized by   The spring having a spring constant settable according to claim 1, wherein the groove has a slit shape.   First and second grooves are formed as the grooves, and the first and second grooves are inserted from directions intersecting each other, and the first and second grooves are perpendicular to the direction in which they are inserted. 3. The spring with adjustable spring constant according to claim 1 or 2, wherein the spring is set at intervals in various directions.   First and second grooves are formed as the grooves, and the first and second grooves are inserted from opposite directions to each other, and the first and second grooves are inserted in the direction in which they are inserted. 3. The spring with adjustable spring constant according to claim 1, wherein the spring is set at intervals in the vertical direction.   5. The spring according to claim 1, wherein the curvature of the line representing the cross-sectional shape of the bottom of the groove changes continuously throughout.   6. The spring with freely settable spring constant according to claim 5, wherein the cross-sectional shape is a substantially arc shape.   One end of the spring according to any one of claims 1 to 6 is coupled to a vibrating body, and the other end of the spring is coupled to a support so that the vibrating body is supported by the support via the spring. A vibrating body supporting device characterized by being supported.   The vibrating body support device according to claim 7, wherein the springs are provided at a plurality of positions at intervals.   The vibrating body supporting device according to claim 8, wherein the pair of springs spaced apart in a predetermined left-right direction are provided at two locations in the front-rear direction orthogonal to the left-right direction.

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