JP2022077334A - Floor impact sound generation device - Google Patents

Abstract

To provide a floor impact sound generation device which can attach a falling object thereto irrespective of a shape of the object so as to reproduce a floor impact sound which is generated in an actual life, and can change a falling height of the falling object and an interval of falling motions.SOLUTION: A floor impact sound generation device comprises: a base 2; an arm 3 of a long-length member turnably fixed to the base 2 at a base end, and having an attachment part 30 for attaching a falling object 9 at a tip; a drive source 5 fixed to the base 2; an output shaft 50 which is formed extending in a horizontal direction from the drive source 5, and transmits the rotation drive of the drive source 5; a rotating body 6 fixed to the output shaft 50, and rotating following the output shaft 50; a salient part 64 which is fixed so as to be salient in a horizontal direction at a position of the rotating body 6 apart from the output shaft 50; and a following part 4 protrusively fixed to a vertical face of the arm 3 on the drive source 5 side, and in contact with the salient part 64 at the rise rotation of the salient part 64. The attachment part 30 attaches the falling object 9 thereto so as to be exchangeable.SELECTED DRAWING: Figure 1

Description

There is an application for exception of loss of novelty

The present invention relates to a floor impact sound generator for generating a floor impact sound that matches real life sounds and experiencing the floor sound insulation performance of a building.

Conventionally, in a facility where the floor sound insulation performance is experienced, a floor impact sound generator for measuring a floor sound insulation performance value such as a bang machine or a tapping machine shown in Patent Document 1 is often used.

Japanese Unexamined Patent Publication No. 2001-4483

However, the floor impact sound generator for measuring the above-mentioned floor sound insulation performance value generates a heavy floor impact sound or a lightweight floor impact sound in accordance with the JIS standard, and is generated by the bang machine or the tapping machine. It is difficult for an experienced person who is not familiar with the floor impact sound to evaluate the floor sound insulation performance.

The present invention has been made in view of the above problems, and is trapped in traits so as to reproduce the walking sound of an adult generated in real life and the floor impact sound when a spoon or toy is dropped from a table. It is an object of the present invention to provide a floor impact sound generator capable of attaching a falling object and changing the falling altitude and the interval of the falling operation.

The floor impact sound generator according to the present invention in order to solve the above problems has a base mounted on the floor and a mounting portion in which the base end is rotatably fixed to the base and a falling object is attached to the tip. An arm of a long member, a drive source fixed to the base, an output shaft formed extending horizontally from the drive source to transmit the rotational drive of the drive source, and an output shaft fixed to the output shaft. A rotating body that rotates according to the above, a protrusion that is fixed so as to project horizontally to the position of the rotating body away from the output shaft, and a protrusion that projects and is fixed to the vertical surface of the arm on the drive source side. A driven portion in which the protrusion and the lower surface come into contact with each other during the ascending rotation of the protrusion is provided, and the mounting portion is characterized in that the falling object is replaceably mounted.

Further, the falling object includes a heavy falling object and a lightweight falling object, and the lightweight falling object is attached to the mounting portion via a hanging string, and the mounting portion is around the hanging string. It is characterized by having a guide portion for suppressing the swing of the hanging string.

The floor impact sound generator according to the present invention in order to solve the above problems has a base mounted on the floor and a mounting portion in which the base end is rotatably fixed to the base and a falling object is attached to the tip. An arm of a long member, a drive source fixed to the base, an output shaft formed extending in the horizontal direction from the drive source to transmit the rotational drive of the drive source, and an output shaft fixed to the output shaft. A rotating body that rotates according to the above, a protrusion that is fixed so as to project horizontally to the position of the rotating body away from the output shaft, and a protrusion that projects and is fixed to the vertical surface of the arm on the drive source side. The rotating body is provided with a driven portion in which the protrusion and the lower surface come into contact with each other when the protrusion rotates ascending, and the rotating body has two or more protrusions detachably attached on the same circle centered on the output shaft. It is characterized by.

Further, the lower surface of the driven portion is characterized in that it inclines downward from the middle of the arm base end side of the driven portion and the arm tip end side of the driven portion toward the arm tip side. do.

Further, the base end of the arm is rotatably fixed to the base via a rotating body, and the arm and the rotating body are removable.

Further, a cushion is provided on the base to prevent the arm from colliding with the floor and the base, and the upper end of the cushion is from the rotation position of the arm when the falling object collides with the floor. Is also low.

Further, the protrusion is characterized in that it is fixed to the rotating body so that the distance from the output shaft can be changed.

Further, the position of the driven portion fixed to the arm can be slid in the axial direction and the vertical direction of the arm.

Further, the floor impact sound generator according to any one of claims 1 to 8 installed on the upper floor, a switch for driving the floor impact sound generator formed on the lower floor, and a switch installed on the lower floor. It is a floor sound insulation performance experience facility having a display for displaying the floor impact sound generator.

According to the floor impact sound generator according to the present invention, a falling object can be attached to the attachment portion without being caught by the trait, and by attaching a ball, a spoon, or the like to the attachment portion, the floor impact sound generated in real life is reproduced. can.

In addition, the lightweight falling object is attached to the attachment part via the hanging string, so that the guide part limits the range of motion of the hanging string, suppresses excessive rolling and excessive jumping of the hanging string, and laterally. It is possible to prevent the lightweight falling object from colliding with the floor impact sound generator itself of the present invention due to shaking and the hanging string from being entangled with the arm due to the jumping of the lightweight falling object.

According to the floor impact sound generator according to the present invention, the rotating body can be detachably attached with two or more protrusions on the same circle centered on the output shaft. By attaching two or more to the rotating body, the time from the fall of the arm to the next support of the arm by the protrusion is shortened, and unnecessary bouncing noise after a heavy falling object collides with the floor is suppressed. Can be done. Further, since the number of times the arm is lifted per rotation of the output shaft can be changed by the number of protrusions attached to the rotating body, it is possible to reproduce a rhythm such as a walking sound or a child's bouncing sound.

Further, since the lower surface of the driven portion on the tip side of the arm is inclined downward, the driven portion comes into contact with the protrusion that rotates upward as compared with the case where the lower surface of the driven portion on the tip side of the arm is not inclined downward. The timing of the operation is shortened, and unnecessary bouncing noise after a heavy falling object collides with the floor can be suppressed.

In addition, since the arm is rotatably fixed to the base via a rotating body, the arm is removable, and by replacing it with another arm of different length, the falling altitude of the falling object can be changed. Is possible. Also, if the arm is damaged, it can be recovered by replacing only the arm.

Further, by providing a cushion on the base for receiving the rotating and falling arm, it is possible to prevent the arm from colliding with other members and generating sound.

Further, by changing the distance between the protrusion fixed to the rotating body and the output shaft, the radius of gyration of the protrusion changes, and the falling altitude of the falling object can be changed.

In addition, since the driven portion can be slid and fixed in the axial and vertical directions of the arm, it is possible to adjust the contact position between the protrusion and the driven portion, and the tip side of the arm of the driven portion is slid upward to drive the driven portion. By sliding the base end side of the arm downward of the arm and inclining and fixing the driven portion with respect to the arm, the contact timing between the driven portion and the ascending and rotating protrusion can be delayed, and the rotating body can be used. When two or more protrusions are attached, the contact between the driven part and the protrusion is released, and while the arm is falling, the next rising and rotating protrusion comes into contact with the driven part and lifts the arm. , It is possible to avoid that the arm is lifted and no impact sound is generated before the falling object collides with the floor.

Further, the floor impact sound generator according to the present invention installed on the upper floor is projected on the display installed on the lower floor, and the floor sound insulation performance is experienced while watching the image, thereby improving the satisfaction of the experiencer. By installing the drive switch of the floor impact sound generator according to the present invention installed on the upper floor on the lower floor, it is not necessary to go back and forth between the upper and lower floors every time the start and stop are performed, and the guide concentrates on the customer service of the experienced person. can.

It is an isometric view which shows an example of the floor impact sound generator which concerns on one Embodiment of this invention. It is a partial cross-sectional view which shows the state of fixing the arm of the floor impact sound generator which concerns on one Embodiment of this invention, and a rotating body. It is a top view which shows the difference of the drop altitude by the arm of a different length of the floor impact sound generator which concerns on other embodiment of this invention. It is a top view which shows the state of mounting the lightweight falling object of the floor impact sound generator which concerns on one Embodiment of this invention. It is a top view which shows the state of attaching the heavy falling object of the floor impact sound generator which concerns on one Embodiment of this invention. It is a partial cross-sectional view which shows the state of the fixing of the arm and the driven part of the floor impact sound generator which concerns on one Embodiment of this invention, and the state of fixing of a driven part main body and a drooping part. It is a partial cross-sectional view which shows the state of the fixing of the arm and the driven part of the floor impact sound generator which concerns on other embodiment of this invention, and the state of fixing of a driven part main body and a drooping part. It is an isotropic projection view which shows the state of the rotating body of the floor impact sound generator which concerns on one Embodiment of this invention, and the rotating body of the floor impact sound generator which concerns on another Embodiment of this invention. It is sectional drawing which shows the state of fixing the rotating body of the floor impact sound generator which concerns on one Embodiment of this invention, and the protrusion. It is a top view which shows the height of the cushion of the floor impact sound generator which concerns on one Embodiment of this invention. It is a partial cross-sectional view which showed the operation method of the floor impact sound generator in the floor sound insulation performance experience facility which concerns on one Embodiment of this invention. It is a top view which shows the operation principle of the floor impact sound generator which concerns on one Embodiment of this invention. It is a top view which shows the contact timing of a driven part and a protrusion by the number of attachments of the protrusions of the floor impact sound generator which concerns on one Embodiment of this invention. It is a top view which shows that the drop altitude of a falling object changes by changing the mounting position of the protrusion of the floor impact sound generator which concerns on other embodiment of this invention. It is a top view which shows that the drop altitude of a falling object changes by changing the height of the drive base of the floor impact sound generator which concerns on other embodiment of this invention. It is a top view which shows that the falling altitude of a falling object is changed by changing the height of the arm base of the floor impact sound generator which concerns on other embodiment of this invention.

An embodiment of the floor impact sound generator according to the present invention will be described below with reference to the drawings. The floor impact sound generator 1 according to an embodiment of the present invention is a device that causes a falling object 9 to collide with the floor 101 to generate a floor impact sound, and as shown in FIG. 1, a base 2 and an arm base. 20, an arm 3, a drive base 210, a drive source 5, a rotating body 6, a cushion base 220, and a cushion 7.

The base 2 is a plate-shaped member placed on the floor 101, and has an arm base 20, a drive base 210, and a cushion base 220.

As shown in FIG. 1, the arm base 20 is a rectangular parallelepiped fixed on the base 2 with a bolt (not shown), and the arm base 20 has a rotating portion 200 on the upper surface of the arm base 20.

As shown in FIG. 1, the rotating portion 200 is composed of two bearings 201, an arm rotating shaft 202, and a rotating body 203 so that the rotating shafts of the two bearings 201 are aligned with each other. The arm base 20 is fixed to the upper surface by bolts (not shown) with a space between the two bearings 201 so that the rotating body 203 can be inserted.

As shown in FIG. 1, the arm rotation shaft 202 is a shaft member that is inserted into the rotation shafts of the two bearings 201 and rotatably fixed.

As shown in FIG. 2, the rotating body 203 is a rectangular parallelepiped, and one surface of the rotating body 203 protrudes so as to fit with the arm 3. The rotating body 203 is fitted with the arm 3 and fixed to the arm 3 with bolts 204, and two bearings 201. It is rotatably fixed via the arm rotation shaft 202.

As shown in FIG. 1, the arm 3 is a long member of a square pipe, and as shown in FIG. 2, the arm rotating shaft 202 is formed by fitting the base end with the rotating body 203 and fixing the arm 3 with a bolt 204. The arm 3 can be removed from the rotating portion 200 by removing the bolt 204. Therefore, as shown in FIG. 3, the falling altitude of the falling object 9 can be changed by replacing the arm 3a with a different length.

Further, when the arm 3 is damaged, it can be restored by replacing it with another arm 3. The arm 3 has a mounting portion 30 at the tip of the arm 3 and a driven portion 4 between the tip of the arm 3 and the base end of the arm 3.

As shown in FIGS. 4 and 5, the mounting portion 30 is provided with a vertical hole 31 and a horizontal hole 32, and has a guide portion 33. The vertical hole 31 has an upper surface of the tip of the arm 3 and the tip of the arm 3. There are three holes penetrating the lower surface of the arm 3 from the tip of the arm 3 toward the base of the arm 3 at the same interval. The lateral hole 32 is a hole that penetrates both side surfaces of the tip of the arm 3. The guide portion 33 is a long spring 33a having an outer diameter smaller than the inner diameter of the vertical hole 31, and a nut 33b having an outer diameter larger than the inner diameter of the vertical hole 31 and the same inner diameter as the inner diameter of the spring 33a is attached to one end thereof.

As shown in FIG. 6, the driven portion 4 is a member fixed to the arm 3 by a bolt 36 on the side surface of the arm 3 on the drive source 5 side, and is a cube-shaped driven portion main body 4a and a driven portion main body 4a. It has a triangular hanging portion 4b, which is fixed to the lower surface with a bolt 41 and becomes thicker toward the tip end side of the arm 3.

The lower surface of the driven portion main body 4a is exposed on the base end side of the arm 3, and the tip end side of the arm 3 is covered with the hanging portion 4b. The lower surface of the driven portion 4 is inclined so that the base end side of the arm 3 is parallel to the lower surface of the arm 3 and the tip end side of the arm 3 is lowered toward the tip end.

The lower surface of the driven portion 4 has a cushioning portion 4c of a sponge member on the entire surface of the base end side parallel to the lower surface of the arm 3 and the tip end side of an inclination that descends toward the tip end side of the arm 3. The cushioning material portion 4c is for preventing a collision sound when the protrusion portion and the driven portion 64 come into contact with each other.

The position of the driven portion 4 attached to the arm 3 will be described. Hereinafter, the end of the driven portion 4 on the arm 3 base end side will be referred to as the driven portion 4 base end, and the end of the driven portion 4 on the arm 3 tip end side will be referred to as the driven portion 4 tip. As shown in FIG. 12, when the arm 3 of the floor impact sound generator 1 according to the embodiment of the present invention is dropped and viewed from the side of the arm rotation shaft 202 in the axial direction, the tip of the driven portion 4 is viewed. Is located closer to the tip of the arm 3 than the tip of the arm 3 of the rotary track drawn by the protrusion 64, and the end of the driven portion 4 is an arm from the end of the arm 3 of the rotary track drawn by the protrusion 64. 3 Install so that it is located on the tip side.

As shown in FIG. 1, the drive base 210 is fixed to the tip side of the arm 3 from the arm base 20 on the base 2 and at a position deviated from the three rotation regions of the arm in the axial direction of the arm rotation shaft 202 by a bolt (not shown). It is a rectangular parallelepiped lower than the arm base 20, and the drive base 210 has a motor fixing base 212 and a spacer 211 on the upper surface of the drive base 210.

As shown in FIG. 1, the floor impact sound generator 1 according to the embodiment of the present invention uses an electric motor 5 as a drive source 5, and the motor fixing base 212 is a lower surface of the motor 5 and a motor. A member for fixing the motor 5 to the drive base 210 with a bolt (not shown) so as to cover two sides of the arm 3 side of the motor 5, and the surface covering the side surface of the motor 5 is a rotational drive of the motor 5. The motor fixing base side hole 213 is provided in the horizontal direction so as to be able to output.

As shown in FIG. 1, the spacer 211 is a long rectangular parallelepiped member for adjusting the height at which the motor 5 is installed, and the motor 5 is a bolt (not shown) for fixing the motor 5 and the drive base 210. And fixed to the drive base 210.

As shown in FIG. 1, the motor 5 is a drive source 5 of the floor impact sound generator 1 according to the embodiment of the present invention, and is fixed to the drive base 210 with a bolt (not shown) by using the motor fixing base 212. It has an output shaft 50.

As shown in FIG. 1, the output shaft 50 is a shaft member that projects from the motor 5 toward the arm 3 side in parallel with the arm rotation shaft 202 through the motor fixing base side hole 213 provided in the motor fixing base 212. Then, the rotational drive of the motor 5 is transmitted to the rotating body 6.

As shown in FIG. 8, the rotating body 6 is fixed to the output shaft 50 by using an output shaft fixing hole 60 which is disk-shaped and is provided in the center of the disk, and an arm protruding in the radial direction parallel to the cross section of the output shaft 50. Is a member provided with two members at a position targeted at 180 degrees, and a protrusion mounting hole 61 is provided at the tip of the arm, and the member rotates according to the rotation of the output shaft 50.

As shown in FIGS. 8 and 9, the protrusion 64 is a columnar member, and the protrusions provided on the tips of the two arms of the rotating body 6 so that the bottom thereof protrudes in the horizontal direction on the arm side. It is detachably fixed to the portion mounting hole 61 with a bolt 62 and a nut 63, and rotates according to the rotation of the rotating body 6.

As shown in FIG. 1, the cushion base 220 is a rectangular parallelepiped lower than the drive base 210, which is fixed to the tip side of the arm 3 from the drive base 210 on the base 2 and at a position where the arm 3 collides with each other with a bolt (not shown). The cushion stand 220 has a cushion stand 221 on the upper surface of the cushion stand 220.

As shown in FIG. 1, the cushion stand 221 is fixed to the upper surface of the cushion stand 220 with a bolt (not shown), and is a member that sandwiches and supports the cushion 7 like a book stand, and fixes the cushion 7 which is a rectangular parallelepiped.

As shown in FIG. 10, the cushion 7 is a sponge member, and its height is adjusted to a height at which the cushion 7 and the arm 3 collide with each other after the falling object 9 collides with the floor 101. It prevents the tip of the arm 3 from colliding with the floor 101 and the floor impact sound generator 1 itself, and avoids damage to the floor impact sound generator 1 and generation of unnecessary collision noise.

As shown in FIG. 11, the floor sound insulation performance experience facility 100 using the floor impact sound generator according to the present invention includes the floor impact sound generator 1 and the floor impact sound generator 1 according to the embodiment of the present invention. The camera 102 for shooting is installed on the floor 101 on the second floor of the floor sound insulation performance experience facility 100, and the drive switch 103 for the floor impact sound generator 1 and the display 104 for displaying the image of the camera 102 are placed on the first floor. It is provided.

Hereinafter, the operating principle of the floor impact sound generator 1 according to the embodiment of the present invention will be described. As shown in FIGS. 1 and 12, the protrusion 64, which is rotated in one direction by the rotational drive of the motor 5, comes into contact with the lower surface of the driven portion 4 on the tip end side of the driven portion 4 during the ascending rotation. ..

The protrusion 64 in contact with the lower surface on the tip end side of the driven portion 4 slides the contact point with the driven portion 4 from the lower surface on the tip side of the driven portion 4 toward the lower surface on the base end side of the driven portion 4 by continuing the rotational movement. Supports and lifts the driven portion 4.

As a result, the arm 3 to which the driven portion 4 is fixed is lifted. When the contact point between the protrusion 64 and the driven portion 4 that continues the rotational movement slides to the lower surface of the base end of the driven portion 4, the contact between the protrusion 64 and the driven portion 4 is released, and the lifted arm 3 rotates due to its own weight. Free fall with the shaft 202 as a fulcrum.

At this time, the falling object 9 attached to the attachment portion 30 at the tip of the arm 3 collides with the floor 101 to generate a floor impact sound.

Then, the protruding portion 64 that rotates upward and rotates in contact with the lower surface of the driven portion 4 on the tip end side of the driven portion 4, and repeats the same operation to automatically and continuously lift and drop the arm 3. ..

The mounting portion 30 can mount the heavy falling object 9a and the lightweight falling object 9b in a convertible manner. The state in which the lightweight falling object 9b is attached will be described below. As shown in FIG. 4, the hanging string 8b is inserted into the guide portion 33 into which the spring 33a is inserted into the vertical hole 31 from above the vertical hole 31 with the end of the guide portion 33 to which the nut 33b is attached facing up. A knot is tied at the upper end of the hanging string 8b inserted into the guide portion 33, and the knot is hooked on the nut 33b to suspend the hanging string 8b. The lightweight falling object 9b is attached to the mounting portion 30 by tying the lightweight falling object 9b to the lower end of the hanging string 8b. Hereinafter, this method of attaching a falling object will be referred to as a method of attaching a lightweight falling object.

In the lightweight falling object attachment method, since the lightweight falling object 9b is tied to the hanging string 8b, it can be attached regardless of the characteristics of the lightweight falling object 9b, and the lightweight falling object 9b is hung with the momentum of colliding with the floor 101. When the string 8b jumps up and falls again, the bouncing sound and rolling sound after the lightweight falling object 9b collides with the floor 101 can be reproduced.

Further, the guide portion 33 limits the range of motion of the hanging string 8b, and suppresses excessive rolling and excessive jumping of the hanging string 8b, so that the lightweight falling object 9b due to rolling causes the floor impact sound of the present invention. It is possible to prevent the hanging string 8b from colliding with the generator itself and the hanging string 8b from being entangled with the arm 3 due to the jumping up of the lightweight falling object 9b.

Further, since the three vertical holes 31 have different distances from the arm rotation shaft 202, the drop altitude of the lightweight falling object 9b can be changed by properly using the vertical holes 31 used in the method for attaching the lightweight falling object.

Next, a state in which the heavy falling object 9a is attached will be described. As shown in FIG. 5, the net 8a is put on the heavy falling object 9a, the end of the net 8a is tied to the horizontal hole 32, and the heavy falling object 9a is attached to the mounting portion 30. Hereinafter, this method of attaching a falling object will be referred to as a method of attaching a heavy falling object.

In the heavy falling object mounting method, since the heavy falling object 9a is tied to and fixed to the mounting portion 30 using a net, it can be mounted regardless of the characteristics of the heavy falling object 9a, and after colliding with the floor 101, it can be mounted. It is possible to reproduce the walking sound of adults and the bouncing sound of children, which do not require the reproduction of bouncing and rolling sounds.

The rotating body 6 of the floor impact sound generator 1 according to the embodiment of the present invention can be attached with a maximum of two removable protrusions 64. A case where the number of protrusions 64 to be attached to the rotating body 6 is preferably one and a case where the number of protrusions 64 to be attached to the rotating body 6 is preferably two will be described. The lightweight falling object mounting method reproduces the bouncing sound and rolling sound after the lightweight falling object 9b collides with the floor 101 by the hanging string 8b jumping up with the momentum of the lightweight falling object 9b colliding with the floor 101 and falling again. Therefore, after the lightweight falling object 9b collides with the floor 101, the hanging string 8b jumps up, and the lightweight falling object 9b needs time to bounce and roll on the floor 101. Therefore, as shown in FIG. 13, by making one protrusion 64 attached to the rotating body 6, the number of times the protrusion 64 comes into contact with the driven portion 4 and lifts the arm 3 while the output shaft 50 makes one rotation is increased. The time from when the arm 3 is dropped until the protrusion 64 comes into contact with the driven portion 4 and the arm 3 is lifted is one time, and the hanging string 8b is set after the lightweight falling object 9b collides with the floor 101. It can be used for the time when the lightweight falling object 9b bounces up and rolls on the floor 101.

Next, in the method of attaching a heavy falling object, it is necessary to fix the heavy falling object 9a using a net 8a and generate a continuous floor impact sound at regular intervals in order to reproduce a walking sound and a child's jumping sound. .. In addition, the bouncing sound of the heavy falling object 9a becomes unnecessary. Therefore, as shown in FIG. 13, by using two protrusions 64 to be attached to the rotating body 6, the protrusions 64 lift the arm 3 twice while the output shaft 50 makes one rotation, so that the arm can be lifted twice. After the fall of 3, the protrusion 64 comes into contact with the driven portion 4, the time until the arm 3 is lifted is shortened, and the interval at which the lightweight falling object 9b continuously collides with the floor 101 is shortened. Further, since the time from the fall of the arm 3 until the protrusion 64 comes into contact with the driven portion 4 and supports the arm 3 is shortened, unnecessary bouncing of the heavy falling object 9a can be prevented.

The rotating body 6 of the floor impact sound generator 1 according to the embodiment of the present invention can be attached with a maximum of two protrusions 64, but the rotating body 6a and the rotating body 6b shown in FIG. 8 It can also be operated in the shape of. The rotating body 6a has a disk shape and is provided with an output shaft fixing hole 60 for fixing to the output shaft 50 in the center of the disk, and an arm protruding from the center of the disk in the radial direction parallel to the cross section of the output shaft 50 is 120 degrees. It is a member provided with three members at intervals of the above, and a protrusion mounting hole 61 is provided at the tip of the arm, and a maximum of three protrusions 64 can be mounted. The rotating body 6b has a disk-shaped output shaft fixing hole 60 for fixing to the output shaft 50 in the center of the disk, and a protrusion length extending from the center of the disk in the radial direction parallel to the cross section of the output shaft 50. Holes 61a are provided, and four protrusion mounting elongated holes 61a are provided at intervals of 90 degrees, and a maximum of four protrusions 64 can be mounted. By using rotating bodies having different shapes in this way, the maximum number of protrusions 64 to be mounted can be changed, and the timing of continuous floor impact noise can be changed.

As shown in FIG. 8, the protrusion 64 of the floor impact sound generator 1 according to the embodiment of the present invention is attached to the protrusion mounting hole 61 of the rotating body 6 with the bolt 62 and the nut 63, so that the protrusion 64 The fixed position is immutable and the radius of gyration of the protrusion 64 cannot be changed, but the rotating body 6b shown in FIG. 8 has a protrusion extending from the center of the disk in the radial direction parallel to the cross section of the output shaft 50. A length hole 61a is provided, and the protrusion 64 can be slid and fixed in the longitudinal direction of the protrusion length hole 61a, and the radius of rotation of the protrusion increases as it approaches the output shaft fixing hole 60 of the rotating body 6b. It's getting shorter. As shown in FIG. 14, by changing the radius of gyration of the protrusion 64, the lifting height of the arm changes, and the falling altitude of the falling object 9 can be changed.

In the floor impact sound generator 1 according to the embodiment of the present invention, as shown in FIG. 6, the driven portion mounting hole provided in the arm 3 so that the longitudinal direction of the driven portion 4 is parallel to the axial direction of the arm 3. Although the bolt 36 is inserted into 34 and the driven portion 4 of the arm 3 is attached, the arm 3a shown in FIG. 7 is
Eight driven portion mounting elongated holes 35 extending in the vertical direction of the arm 3a are provided side by side in the axial direction of the arm 3a at equal intervals with the pitch of the bolt holes provided in the driven portion 4, and the driven portion mounting elongated holes 35 are provided. The inner diameter in the lateral direction is larger than the bolt diameter of the bolt 36 for attaching the driven portion 4. Therefore, it is possible to attach the driven portion 4 to the arm 3a with a bolt 36 via a washer 37 having an outer diameter larger than the inner diameter of the driven portion mounting slot 35 in the lateral direction. As a result, the driven portion 4 can be mounted by sliding the arm 3a in the longitudinal direction of the driven portion mounting slot 35 in the vertical direction, and by properly using the eight driven portion mounting slot 35 arranged in the arm 3a axial direction. , The driven portion 4 can be attached by sliding in the arm 3a axis direction, and when changing the height of the arm base 20 and the motor 5 units or changing the turning radius of the protrusion 64, the protrusion 64 The mounting position of the driven portion 4 can be changed so that the driven portion 4 makes good contact with the driven portion 4.

Further, as shown in FIG. 7, the tip of the driven portion 4 is slid to the upper side of the arm 3a, the base end of the driven portion 4 is slid to the lower side of the arm 3a, and the driven portion 46 is tilted by attaching to the arm 3a. Can be made to. Since the base end of the driven portion 4 is lowered and inclined, the contact timing between the protruding portion 64 that rotates ascending and the driven portion 4 can be delayed. As a result, when two or more protrusions 64 are attached, the support of the driven portion 4 by the protrusions 64 is released, and while the arm 3a is falling, the protrusions 64 and the driven portion 4 that rotate upward next are released. Can contact and lift the arm 3a to eliminate the situation where the falling object 9 does not collide with the floor 101.

In another embodiment other than the floor impact sound generator 1 according to the embodiment of the present invention, as shown in FIG. 15, by using the drive base 210a having a high height, the position of the drive source 5 becomes higher. The rotation position of the protrusion 64 becomes higher. As a result, the contact position between the driven portion 4 and the protruding portion 64 becomes higher, and the falling altitude of the falling object 9 can be increased. Further, by using the drive base 210b having a low height, the position of the drive source 5 is lowered, and the rotation position of the protrusion 64 is lowered. As a result, the contact position between the driven portion 4 and the protruding portion 64 is lowered, and the falling altitude of the falling object 9 can be lowered.

In another embodiment other than the floor impact sound generator 1 according to the embodiment of the present invention, as shown in FIG. 16, by using the arm base 20a having a high height, the driven portion 4 and the protrusion 64 , The contact position is lowered, and the falling altitude of the falling object 9 can be lowered. Further, by using the arm base 20b having a low height, the position where the driven portion 4 and the protruding portion 64 come into contact with each other becomes higher, and the falling altitude of the falling object 9 can be increased. At this time, since the rotation range of the arm 3 changes, the cushions 7a and 7b having different heights are used for the cushion 7 so that the height is based on the position of the cushion as described above.

As shown in FIG. 11, the guide guides the experiencer to the lower floor of the floor sound insulation performance experience facility 100 in which the floor impact sound generator 1 is installed on the upper floor, and the floor impact sound generator 1 reflected on the display 104. And press the drive switch. The experiencer can improve the satisfaction level by simultaneously seeing and listening to the image of the floor impact sound generator 1 displayed on the display 104 and the floor impact sound echoing on the lower floor.

In addition, the guide can focus on guiding the experiencer without going back and forth between the upper and lower floors, and can improve the satisfaction of the experiencer.

Since the above is only an embodiment of the floor impact sound generator according to the present invention, it can be appropriately changed without departing from the idea of the present invention.

1 Floor impact sound generator 2 Base 203 Rotating body 3 Arm 30 Mounting part 33 Guide part 4 Driven part 4b Drooping part 5 Drive source (motor)
50 Output shaft 6 Rotating body 64 Protrusion 7 Cushion 8b Hanging string 9 Falling object 100 Floor sound insulation performance experience facility 101 Floor 103 Drive switch 104 Display

Claims (9)

The base placed on the floor and
An arm of a long member whose base end is rotatably fixed to the base and has a mounting portion for attaching a falling object to the tip.
The drive source fixed to the base and
An output shaft that extends horizontally from the drive source and transmits the rotational drive of the drive source,
A rotating body fixed to the output shaft and rotating according to the output shaft,
A protrusion fixed so as to project horizontally to the position of the rotating body away from the output shaft,
It is provided with a driven portion that is projected and fixed to the vertical surface of the arm on the drive source side and that the protrusion and the lower surface come into contact with each other during the ascending rotation of the protrusion.
The mounting portion is a floor impact sound generator characterized in that the falling object is replaceably mounted. The falling object includes a heavy falling object and a lightweight falling object.
The lightweight falling object is attached to the attachment portion via a hanging string, and is attached to the attachment portion via a hanging string.
The floor impact sound generator according to claim 1, wherein the mounting portion has a guide portion that suppresses the swing of the hanging string around the hanging string. The base placed on the floor and
An arm of a long member whose base end is rotatably fixed to the base and has a mounting portion for attaching a falling object to the tip.
The drive source fixed to the base and
An output shaft that extends horizontally from the drive source and transmits the rotational drive of the drive source,
A rotating body fixed to the output shaft and rotating according to the output shaft,
A protrusion fixed so as to project horizontally to the position of the rotating body away from the output shaft,
It is provided with a driven portion that is projected and fixed to the vertical surface of the arm on the drive source side and that the protrusion and the lower surface come into contact with each other during the ascending rotation of the protrusion.
The rotating body is a floor impact sound generator characterized in that two or more of the protrusions are detachably attached on the same circle centered on the output shaft. A claim characterized in that the lower surface of the driven portion is inclined downward from the middle of the arm base end side of the driven portion and the arm tip end side of the driven portion toward the arm tip side. Item 6. The floor impact sound generator according to any one of Items 1 to 3. One of claims 1 to 4, wherein the base end of the arm is rotatably fixed to the base via a rotating body, and the arm and the rotating body are removable. The floor impact sound generator described in. A cushion is provided on the base to prevent the arm from colliding with the floor and the base, and the upper end of the cushion is lower than the rotational position of the arm when the falling object collides with the floor. The floor impact sound generator according to any one of claims 1 to 5. The floor impact sound generator according to any one of claims 1 to 6, wherein the protrusion is fixed to the rotating body so that the distance from the output shaft can be changed. The floor impact sound generator according to any one of claims 1 to 7, wherein the position of the driven portion fixed to the arm can be slid in the axial direction and the vertical direction of the arm. The floor impact sound generator according to any one of claims 1 to 8 installed on the upper floor, a switch for driving the floor impact sound generator formed on the lower floor, and the floor installed on the lower floor. Floor sound insulation performance experience facility with a display that displays an impact sound generator.

Images