JP7115708B2 - Silencer jig - Google Patents

Description

The present invention relates to a muffling jig.

Patent Literature 1 discloses a noise reduction device for a pneumatic fastener driving machine. This noise reduction device is configured to reduce the sound produced when compressed air is suddenly released (hereinafter referred to as ejection sound).

JP-A-2004-074299

However, although the above technology can reduce the ejection sound of a projecting object such as a nail, the sound of the projecting object colliding with or penetrating an object to be driven such as a pillar (hereinafter, these colliding sounds and penetrating sounds are collectively referred to as (referred to as "impact sound") cannot be reduced.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a noise reduction jig capable of reducing not only the emitted sound but also the impact sound.

A noise-reducing jig according to a first aspect includes a mounting portion that can be mounted on a driving machine, and a soundproofing material that is disposed so as to surround an injection trajectory of an injection product from the driving machine mounted on the mounting part. and an impact sound reduction part having a contact surface that contacts an object to be driven and made of a vibration-proof material.

In this aspect, the noise reduction jig includes an attachment portion that can be attached to the driving machine. Therefore, by attaching the mounting portion to a driving machine such as a nailing machine, the noise reduction jig can be mounted to the driving machine.
Moreover, the noise reduction jig includes an emission sound reduction section made of a soundproof material. The ejection sound reducing portion is arranged so as to surround the ejection trajectory of the ejected product by the driving tool attached to the attachment portion. Therefore, the ejection sound of an object such as a nail is reduced by the ejection sound reduction section.
Further, the muffling jig includes an impact sound reducing portion made of a vibration-proof material. The impact sound reduction portion has a contact surface that contacts the impact target. Therefore, by driving the projecting object such as a nail while the contact surface is in contact with the driving object such as the pillar, the impact sound between the projecting object and the driving object can be reduced.

As described above, according to the noise-reducing jig of this aspect, it is possible to reduce not only the ejection sound but also the impact sound when the projectile is driven into the driving object by the driving machine.

The term "soundproof material" in the present invention is a concept that includes not only sound absorbing materials (such as glass wool) that have a function of absorbing sound, but also materials that have a function of blocking sound.

In the muffling jig according to a second aspect, in the first aspect, the impact sound reduction section has a contact surface between the impact target and the impact sound reduction section in a state in which the contact surface is in contact with the impact target. It has a recess forming a fixed object arrangement space for arranging a fixed object, and the fixed object arrangement space is a cross section perpendicular to the injection trajectory from the space on the upstream side in the injection direction with respect to the fixed object arrangement space. is enlarged in size.

In this aspect, the impact sound reduction section has a recess that forms the space for arranging the fixed object. The space for arranging a fixed object is a space for arranging a fixed object between the object to be driven and the impact sound reducing portion while the contact surface is in contact with the object to be driven. The size of the cross section perpendicular to the injection trajectory of the fixed object arrangement space is larger than that of the space on the upstream side in the injection direction with respect to the fixed object arrangement space.
Therefore, even if a fixed object such as a bracket to be fixed to an object to be driven such as a pillar is relatively large, the fixed object is arranged in the fixed object arrangement space, and the contact surface of the impact sound reduction portion is brought into contact with the object to be driven. The driving work can be performed in a state where the

A muffling jig according to a third aspect is, in the second aspect, formed such that the fixed object arrangement space is opened in a direction perpendicular to the injection trajectory.

In this aspect, the recess is formed such that the space for arranging the fixed matter is open in the direction perpendicular to the injection trajectory. Therefore, since the space for arranging the fixed object is opened in the direction perpendicular to the injection trajectory in a state in which the contact surface is in contact with the object to be driven, a state in which a part of the fixed object such as the bracket is outside the space for arranging the fixed object. can be used for driving operations.

A muffling jig according to a fourth aspect is, in any one of the first to third aspects, further comprising a suction portion for attracting the contact surface to the driving target.

In this aspect, the muffling jig includes the suction portion for causing the contact surface to be attracted to the driving target. Therefore, since the contact surface of the impact sound reduction portion can be easily brought into close contact with the driving target such as the pillar, the noise reduction effect of the impact sound reduction portion can be stably obtained.

A sound deadening jig according to a fifth aspect is, in any one of the first to fourth aspects, wherein the emitted sound reducing portion is arranged to surround the emitted sound trajectory and is made of a sound absorbing material. It is configured including a sound absorbing part.

In this aspect, the emission sound reduction section includes an emission sound absorption section made of a sound absorbing material (such as glass wool). The ejection sound absorption part is arranged so as to surround the ejection trajectory. As a result, the sound of a projecting object such as a nail is effectively reduced.

A sound deadening jig according to a sixth aspect is, in any one of the first to fifth aspects, the area of the contact area formed by the contact surface is 2 times the cross-sectional area perpendicular to the injection trajectory of the mounting portion. more than double.

In this aspect, the area of the contact area formed by the contact surface is two times or more (more preferably five times or more) the cross-sectional area of the mounting portion perpendicular to the injection trajectory. As a result, the injection direction with respect to the object to be driven is stabilized, and a small and easy-to-handle noise reduction jig can be provided.
A specific description will be given. Firstly, the area of the contact area formed by the contact surface contributes to the stability of the ejection direction with respect to the target. On the other hand, increasing the overall size of the muffling jig makes the muffling jig difficult to handle. In this aspect, the area of the contact area formed by the contact surface is at least twice the cross-sectional area of the mounting portion orthogonal to the injection direction. As a result, the area of the contact area formed by the contact surface is increased without increasing the overall size of the noise reduction jig. As a result, the direction of injection with respect to the object to be driven is stabilized, and a small and easy-to-use noise reduction jig can be provided.
If the cross-sectional area perpendicular to the injection direction of the mounting portion differs depending on the position in the injection direction, the above-mentioned "cross-sectional area perpendicular to the injection direction of the mounting portion" is the same as the part of the driving tool that is inserted. Consider the average value of the cross-sectional area in the range (range in the injection direction).

According to the present invention, it is possible to provide a muffling jig capable of reducing not only the emitted sound but also the impact sound.

1 is a perspective view showing a muffling jig of an embodiment; FIG. 3A and 3B are trihedral views (a plan view, a front view, and a right side view) showing the silencing jig of the embodiment; FIG. FIG. 3 is a cross-sectional view (a cross-sectional view taken along line 3-3 in FIG. 2) showing the silencing jig of the embodiment; FIG. 3 is a cross-sectional view showing the state of use of the muffling jig of the embodiment; FIG. 10 is a cross-sectional view showing a variation of a method of arranging magnets; It is a perspective view which shows the noise-reduction jig|tool of a modification. It is a perspective view which shows the noise-reduction jig|tool of a modification.

A noise reduction jig 10 according to an embodiment of the present invention will be described below with reference to the drawings.

Note that the arrow FR, the arrow UP, and the arrow LH shown in each drawing will be described as the front side in the front-rear direction, the upper side in the vertical direction, and the left side in the horizontal direction, respectively. Also, the front-rear direction may be called the injection direction, the front-rear direction front side may be called the injection direction downstream side, and the front-rear direction rear side may be called the injection direction upstream side.

FIGS. 1 to 3 show a muffling jig 10 of the first embodiment.

As shown in FIGS. 1 to 3, the noise reduction jig 10 includes a resin member 20 made of synthetic resin, a vibration isolation member 30 made of a vibration isolation material such as rubber, a sound absorption material 40, and a magnet 50. and

(Resin member 20)
As shown in FIG. 3, the resin member 20 includes a base end portion 22 on the upstream side in the injection direction and a distal end portion 21 on the downstream side in the injection direction. The base end portion 22 has an attachment portion 23 to which the driving tool 90 is attached, and a sound absorbing material placement portion 24 to which the sound absorbing material 40 is placed. The distal end portion 21 functions as a fixing portion to which the vibration isolating member 30 is fixed.

As shown in FIG. 1 , the distal end portion 21 is formed so that the size of the cross section perpendicular to the injection direction is larger than that of the proximal end portion 22 . The distal end portion 21 has a rectangular cross section perpendicular to the ejection direction, and the base end portion 22 has a circular cross section perpendicular to the ejection direction.

As shown in FIG. 3, the base end portion 22 has a cylindrical peripheral wall 22A and ribs 22B formed inside the peripheral wall 22A. The peripheral wall 22</b>A is formed in a cylindrical shape centering on the injection trajectory AX of the product ejected by the driving machine 90 attached to the noise reduction jig 10 . The rib 22B is formed to protrude from the inner surface of the peripheral wall 22A toward the injection locus AX. The shape of the rib 22B is circular when viewed from the injection direction.

The rib 22B is positioned in the middle position in the front-rear direction inside the peripheral wall 22A. A space in front of the rib 22B inside the peripheral wall 22A is a space in which a sound absorbing material 40 such as glass wool is arranged, and a space behind the rib 22B is a space in which a nose top 91 of a nailer 90 is inserted. (See Figure 4).

The sound absorbing material 40 is arranged so as to leave a space through which the injection trajectory AX of the product shot by the driving machine 90 passes. The sound absorbing material 40 is a material having a function of absorbing sound, such as glass wool, rock wool, or urethane foam. The sound absorbing material 40 is arranged in a cylindrical region centered on the injection locus AX. Therefore, the sound absorbing material 40 is arranged so as to surround the injection locus AX. The sound absorbing material 40 arranged in this manner corresponds to the "emitted sound absorbing portion" of the present invention.

In this embodiment, the position of the rib 22B inside the peripheral wall 22A is on the front side of the center in the front-rear direction.

Further, when the nose top 91 of the driving machine 90 is inserted, the nose top 91 of the driving machine 90 is held on the upstream side of the rib 22B inside the peripheral wall 22A in the injection direction (that is, the mounting portion 23). A holding member 23B for holding is provided. The holding member 23B is, for example, a ring-shaped rubber member as shown in FIG.

A through hole 21H is formed in the tip portion 21 so as to penetrate therethrough in the injection direction. The through hole 21H is formed at a position through which the injection trajectory AX passes. In this embodiment, the size and shape of the through hole 21H of the tip portion 21 are the same as the hole formed by the rib 22B.

In this embodiment, as shown in FIG. 2(B), the position of the through hole 21H substantially coincides with the position of the centroid of the outer shape when the tip portion 21 is viewed from the injection direction.

As shown in FIG. 3, the tip portion 21 of the resin member 20 has a fixing surface 21S to which the vibration isolating member 30 is fixed by adhesion or the like. The fixed surface 21S is a plane with the normal direction directed to the emission direction.

(vibration isolating member 30)
The external shape of the vibration isolating member 30 is the same external shape as the tip portion 21 of the resin member 20 when viewed from the injection direction. In this embodiment, the outer shape of the vibration isolating member 30 is the same rectangular shape as the tip portion 21 of the resin member 20 when viewed from the injection direction.

The vibration isolating member 30 has a front surface 30S, side surfaces 30T and a rear surface 30U.
A rear surface 30U of the vibration isolating member 30 is fixed to the fixing surface 21S of the tip portion 21 of the resin member 20 by adhesion or the like.
A front surface 30S of the vibration isolating member 30 is a flat surface with the normal direction directed to the emission direction. The front surface 30S of the vibration isolating member 30 comes into contact with a driving target 80 (see FIG. 4) such as a pillar during the driving operation. The front surface 30S of the anti-vibration member 30 corresponds to the "contact surface" of the present invention.

A recess 31 is formed in the vibration isolating member 30 . The recessed portion 31 is formed such that the front surface 30S of the vibration isolating member 30 is recessed toward the upstream side in the injection direction (rear side in the front-rear direction). However, in the present embodiment, the depth of the recess 31 (the depth toward the upstream side in the injection direction) matches the thickness of the anti-vibration member 30 . That is, the recess 31 of the vibration isolating member 30 of this embodiment penetrates the vibration isolating member 30 in the thickness direction.

When the front surface 30S of the vibration isolating member 30 is in contact with the surface 81 of the pillar 80 to be driven, a space (hereinafter referred to as a fixed object placement space 32) is formed between the pillar 80 and the noise reduction jig 10. be. The fixed object arrangement space 32 is perpendicular to the injection trajectory AX from the space on the upstream side of the injection direction with respect to the fixed object arrangement space 32 (in this embodiment, the space defined by the through hole 21H of the tip portion 21 of the resin member 20). The size of the cross-section is enlarged. In this embodiment, the fixed object arrangement space 32 is a rectangular parallelepiped space.

When a projectile such as a nail is ejected from the driving tool 90, the projectile such as a nail is formed by the space formed by the rib 22B, the space formed by the sound absorbing material 40, and the through hole 21H of the tip portion 21 of the resin member 20. and the space formed by the recess 31 in this order.

The fixed object placement space 32 is formed so as to open in a direction perpendicular to the injection trajectory AX (in this embodiment, the left side in the horizontal direction as shown in FIG. 1). In other words, the vibration isolating member 30 is not formed so as to surround the injection locus AX from the entire circumference in the direction orthogonal to the injection locus AX.

(magnet)
As shown in FIGS. 1 and 4, a magnet 50 is arranged on the vibration isolating member 30 . Specifically, as shown in FIG. 5A, a recess 33 is formed in the front surface 30S of the vibration isolating member 30. As shown in FIG. A magnet 50 is arranged in this recess 33 . Even if the front surface 30S of the vibration-isolating member 30 is pressed against the driving target 80 and the vibration-isolating member 30 is slightly deformed, the magnet 50 is positioned downstream of the front surface 30S of the vibration-isolating member 30 in the injection direction (forward in the front-rear direction). ) are arranged so that they do not pop out.

However, the magnet 50 may be arranged in a state of being embedded in the vibration isolating member 30 as shown in FIG. 5(B).

(Large diameter portion 10A, small diameter portion 10B)
As shown in FIG. 3, the noise reduction jig 10 can also be regarded as being composed of a small diameter portion 10B having a small cross section perpendicular to the injection direction and a large diameter portion 10A having a large cross section perpendicular to the injection direction. .

The outer shape of the small diameter portion 10B has a circular cross section orthogonal to the injection direction. The outer shape of the large diameter portion 10A has a rectangular cross section orthogonal to the injection direction.

The small diameter portion 10</b>B includes the base end portion 22 of the resin member 20 and the sound absorbing material 40 . The large diameter portion 10</b>A includes a distal end portion 21 of a resin member 20 , a vibration isolating member 30 and a magnet 50 .

(Driving work)
FIG. 4 is a cross-sectional view showing an example of the state of use of the muffling jig 10. As shown in FIG. FIG. 4 shows, as an example, how the muffling jig 10 of the present embodiment is used when driving a nail into an iron pillar 80 (“target for driving”). Also, in this example, the operation of fixing the bracket 70 (“fixed object”) to the pillar 80 by driving a nail into the pillar 80 while the bracket 70 is superimposed on the pillar 80 is shown.

The bracket 70 includes a first portion 71 arranged along the surface 81 of the column 80, a second portion 72 connected to the first portion 71 across a bent portion bent in the thickness direction, and a and a third portion 73 connected to the second portion 72 across the curved portion.

As shown in FIG. 4, when the driving operation is performed, the first part 71 of the bracket 70 is arranged in the fixed object arrangement space 32, and the second part 72 and the third part 73 of the bracket 70 are not arranged. Depth D1 (see FIG. 3) of recess 33 is greater than thickness of first portion 71 of bracket 70, but smaller than thickness D2 of bracket 70 (see FIG. 4). A depth D1 of the recess 33 is, for example, 5 mm or less.

The front surface 30S (“contact surface”) of the vibration isolating member 30 is in close contact with the surface 81 of the pillar 80 . Therefore, the ejection trajectory AX is perpendicular to the surface 81 of the column 80 .

<Action effect>
Next, the effects of this embodiment will be described.

In this embodiment, the muffling jig 10 includes an attachment portion 23 that can be attached to the driving machine 90 . Therefore, by attaching the mounting portion 23 to the driving machine 90 such as a nailing machine, the noise reduction jig 10 can be mounted to the driving machine 90 .
The noise reduction jig 10 also includes an emission sound reduction portion 11 (see FIG. 3) made of a soundproof material. It should be noted that the "soundproof material" in the present invention is a concept that includes not only a sound absorbing material that has a function of absorbing sound but also a material that has a function of blocking sound. correspond to The ejection sound reducing portion 11 is arranged so as to surround an ejection trajectory AX of an ejected object by the driving tool 90 attached to the attachment portion 23 . Therefore, the ejection sound of an object such as a nail is reduced by the ejection sound reduction unit 11 .
The muffling jig 10 also includes an impact sound reducing portion 12 made of a vibration-isolating material (vibration-isolating member 30). The impact sound reducing portion 12 has a contact surface 30S that contacts the impact target 80 . Therefore, by driving a projecting object such as a nail while the contact surface 30S is in contact with the driving object 80 such as a pillar, the impact sound between the projecting object and the driving object 80 can be reduced.

As described above, according to the noise reduction jig 10 according to the present embodiment, not only the ejection sound but also the impact sound when driving the projectile into the driving target 80 by the driving machine 90 can be reduced.

Further, in the present embodiment, the impact sound reducing portion 12 has the recess portion 31 that forms the fixed object placement space 32 . The fixed object arrangement space 32 is a space for arranging the fixed object 70 between the striking object 80 and the impact sound reducing portion 12 while the contact surface 30S is in contact with the striking object 80 . The fixed object arrangement space 32 has a larger cross section perpendicular to the injection trajectory AX than the space on the upstream side in the injection direction with respect to the fixed object arrangement space 32 .
For this reason, even if the fixed object 70 such as a bracket to be fixed to the driving target 80 such as a pillar is relatively large, the fixed object 70 is arranged in the fixed object arrangement space 32, and the contact surface of the impact sound reduction part 12 is reduced. The driving operation can be performed while the 30S is in contact with the driving target 80. - 特許庁

Further, in the present embodiment, the muffling jig 10 includes an attraction portion (magnet 50 ) for attracting the contact surface 30</b>S to the driving target 80 . Therefore, since the contact surface 30S of the impact sound reduction portion 12 can be easily brought into close contact with the driving target 80 such as a pillar, the noise reduction effect of the impact sound reduction portion 12 can be stably obtained.

In addition, in this embodiment, the recess 31 is formed so that the fixed object arrangement space 32 is open in the direction perpendicular to the injection direction. Therefore, since the fixed object arrangement space 32 is opened in the direction perpendicular to the ejection direction in a state where the contact surface 30S is in contact with the driving target 80, a part of the fixed object 70 such as a bracket is moved into the fixed object arrangement space 32. It is possible to carry out driving work in the state that it is put out.

Further, in the present embodiment, the emitted sound reducing portion 11 includes an emitted sound absorbing portion 40 (sound absorbing material 40 ) made of a sound absorbing material 40 . The ejection sound absorbing portion 40 is arranged so as to surround the ejection locus AX. Therefore, the ejection sound of an object such as a nail is effectively reduced.

Further, in the present embodiment, the area of the contact region formed by the contact surface 30S (the area represented by L1×L2 in FIG. 2) is twice or more (more Specifically, it is 5 times or more). As a result, the injection direction with respect to the driving target 80 is stabilized, and the noise reduction jig 10 that is small and easy to handle can be obtained.
A specific description will be given. First, the area of the contact region formed by the contact surface 30S (the area represented by L1×L2) contributes to the stability of the injection direction with respect to the injection target. On the other hand, increasing the overall size of the muffling jig 10 makes the muffling jig 10 difficult to handle (see FIG. 7). In the present embodiment, the area of the contact region formed by the contact surface 30S (the area represented by L1×L2) is made larger than the cross-sectional area of the mounting portion 23 orthogonal to the injection direction. As a result, the area of the contact region formed by the contact surface 30S (the area represented by L1×L2 in FIG. 2) is increased without increasing the size of the muffling jig 10 as a whole. Therefore, the injection direction with respect to the driving target 80 is stabilized, and the noise reduction jig 10 that is compact and easy to use can be obtained.

[Supplementary explanation of the above embodiment]
In the above embodiment, an example in which the "driver" is the nail driver 90 for driving nails has been described, but the present invention is not limited to this. A "driver" of the present invention may be, for example, a machine for driving staples.

Further, in the above-described embodiment, a space for arranging the sound absorbing material 40 is formed in the resin member 20, and the example in which the sound absorbing material 40 is arranged in the space has been described. In other words, an example has been described in which the muffling jig 10 includes the emitted sound absorbing portion 40 (sound absorbing material 40).
However, the muffling jig of the present invention is not limited to this, and the muffling jig does not have to include the emitted sound absorbing portion 40 (sound absorbing material 40).
For example, the sound absorbing material 40 may be removed from the muffling jig 10 of the first embodiment. Even in this case, it can be said that the resin member 20 as a "soundproof material" is arranged so as to surround the injection locus AX from the periphery. In other words, even in this case, it can be said that the noise reduction jig is provided with the emitted sound reduction section 11 . Thus, the "soundproof material" in the present invention is a very broad concept.

Further, in the above-described embodiment, the example in which the depth of the recess 31 is the same as the thickness of the vibration-isolating member 30 (that is, the example in which the entire thickness direction of the vibration-isolating member 30 is the recess 31) has been described. However, the "depression" of the present invention is not limited to this. For example, the depth of the recess 31 may be smaller than the thickness of the anti-vibration member 30 . Specifically, for example, the depth of the recessed portion 31 may be set to 5 mm or less, and the thickness of the anti-vibration member 30 may be set to 10 mm or more.

Further, for example, the muffling jig of the present invention may be a muffling jig 110 in which the impact sound reducing portion (anti-vibration member 130) does not have the recess 31, as shown in FIG.
In the noise reduction jig 110, the vibration isolating member 130 is formed with a through hole 135 through which the injection trajectory AX passes. The size of the through-hole 135 (the size when viewed in the injection direction) is substantially the same as the through-hole 21</b>H of the tip portion 21 of the resin member 20 .

Further, for example, the muffling jig of the present invention may be a muffling jig 210 as shown in FIG.
In this muffling jig 210 , the resin member 220 does not have the base end portion 22 and the tip end portion 21 . Therefore, the muffling jig 210 does not include the large diameter portion 10A (see FIG. 3) and the small diameter portion 10B. As a result, the area of the contact area formed by the contact surface 30S is substantially the same as the cross-sectional area of the mounting portion 23 perpendicular to the injection direction.
Also, the vibration isolating member 230 of the noise reduction jig 210 has a recess 231 . However, the fixing portion arrangement space 232 formed by the recess 231 is not open in the direction perpendicular to the injection direction. In other words, the anti-vibration member 230 having the recess 231 is formed so as to surround the injection locus AX from the entire periphery in the direction orthogonal to the injection locus AX.

Regarding the noise reduction jig 110 and the noise reduction jig 210, the same reference numerals are assigned to the same configurations as in the above-described embodiment, and detailed description thereof will be omitted.

10 Muffling jig 11 Emission sound reduction part 12 Impact sound reduction part 23 Mounting part 30 Anti-vibration member 30S Front surface (contact surface)
31 recessed portion 32 fixed object arrangement space 40 sound absorbing material (emission sound sound absorbing portion)
50 magnet (adsorption part)
70 bracket (fixed object)
80 columns (target for driving)
90 nailer (driver)
110 Silencer jig 130 Anti-vibration member (impact sound reduction part)
210 Silencer jig 230 Anti-vibration member (impact sound reduction part)
231 recess 232 fixed object arrangement space AX injection trajectory

Claims (4)

a mounting portion that can be mounted on a driving machine;
an injection sound reduction section, which is arranged to surround the injection trajectory of the injection product from the driving tool attached to the mounting section, and which is made of a soundproof material;
an impact noise reducing portion having a contact surface that contacts an impact target and made of a vibration-proof material;
with
The impact sound reduction section has a recess that forms a fixed object placement space for arranging a fixed object between the impact target and the impact sound reduction section in a state in which the contact surface is in contact with the impact target. have
The fixed object placement space has a larger cross section perpendicular to the injection trajectory than the space on the upstream side in the injection direction with respect to the fixed object placement space,
The recess is formed such that the space for arranging the fixed matter is open in a direction perpendicular to the injection trajectory.
Silencer . The muffling jig according to claim 1 , further comprising a suction portion for attracting said contact surface to said driving target. The ejection sound reduction unit is arranged to surround the ejection trajectory and includes an ejection sound absorption unit made of a sound absorbing material.
The muffling jig according to claim 1 or 2 . The area of the contact area formed by the contact surface is at least twice the cross-sectional area of the mounting portion perpendicular to the injection trajectory.
The muffling jig according to any one of claims 1 to 3 .

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