JP5438544B2 - Carry type amplifier bench - Google Patents

Description

  The present invention relates to an amplifier bench, and more particularly to a carry-type amplifier bench that not only holds an amplifier at a desired height from the floor but also can carry the amplifier integrally.

  When a band including a guitarist and a keyboard player performs at a performance hall, various amplifiers such as a guitar amplifier are used. On the other hand, when the amplifier is placed directly on the floor of the performance hall, it often happens that the sound of other instruments feels that one's own sound cannot be heard. In such a case, the amplifier is operated to increase its own volume, but this causes a problem that the sound balance is lost. In order to solve such a problem, an amplifier bench is used, and an amplifier is arranged at a desired height from the floor surface to propagate sound in an optimal direction. Therefore, the amplifier bench is extremely important for providing the audience with the optimal performance when performing solo performances or band performances at various performance venues.

  The conventional amplifier bench is intended to support the amplifier at a predetermined height from the floor surface. For example, a steel tube and an aluminum tube are combined, and a leg portion and a pedestal are formed by welding or screwing. Therefore, the conventional amplifier bench is configured to have a function of only supporting the amplifier at a predetermined height from the floor surface, and does not have a function of transporting the amplifier. Therefore, when carrying the amplifier after the performance is finished, it is the actual situation that the amplifier and the amplifier bench are separately housed in a car or carried or mounted on a carry cart.

On the other hand, carry carts are used as means for transporting various kinds of luggage. For example, a carry cart intended to carry a load in a stable placement state has been proposed (see, for example, Patent Document 1). This known carry cart is composed of a mounting table on which goods such as goods are loaded, a pair of left and right wheels arranged at the side end of the mounting table, and two columns connected to an axle that rotatably supports the wheels. And a handle.
JP 2002-160636 A

  The conventional amplifier bench has only a function to support the amplifier at a predetermined height from the floor surface, and therefore the amplifier bench and the amplifier must be carried separately after the performance is finished. In this case, the amplifier can be transported using a carry cart. However, because the carry cart is intended to carry luggage, it is only placed in the waiting room at the performance venue. On the other hand, if the amplifier bench can hold the amplifier and also function as a carry cart, it can be carried to the performance venue with the amplifier mounted on the amplifier bench and functions as an amplifier bench that supports the amplifier during performance. Therefore, workability is greatly improved when carrying the amplifier and the amplifier bench.

  Accordingly, an object of the present invention is to realize a carry-type amplifier bench that can support an amplifier at a desired height from the floor at a performance venue and can be carried with the amplifier.

The amplifier bench according to the present invention is attached to two columns extending in parallel with each other, a plurality of connecting shafts fixed to the two columns with a predetermined interval, and rotatably attached to end portions of the columns. A bench body having wheels;
An auxiliary leg that is pivotally connected to the bench body and occupies a first position that forms a predetermined angle with respect to the two struts and a second position that is parallel to the two struts;
A table that is detachably connected to the connecting shaft of the bench body and supports the amplifier,
The table selectively selects a first position at which a table surface on which the amplifier is placed has an angle of more than 90 ° with respect to the support and a second position at which the table surface is substantially orthogonal to the support. Can occupy
When the auxiliary leg is set to the first position and the table is set to the first position, it functions as an amplifier bench that supports the amplifier at a predetermined height from the floor surface, and the auxiliary leg is the second position. And when the table is set to the second position, it functions as a carry cart for carrying the amplifier.

  In a preferred embodiment of the amplifier bench according to the present invention, the table is made of a vibration isolating material, has a pedestal plate on which the amplifier is placed, and the two struts are made of a vibration isolating material. A vibration sheet is provided, and the amplifier being transported is supported by a pedestal plate and an anti-vibration sheet, and is configured such that vertical and horizontal vibrations are absorbed by the pedestal plate and the anti-vibration sheet.

  The amplifier bench according to the present invention can support the amplifier at a desired height from the floor surface in a stationary state, and can be transported integrally with the amplifier in a transported state. Therefore, according to the present invention, an amplifier bench capable of supporting the amplifier at a desired height from the floor at the performance venue and transporting the amplifier integrally is realized.

It is a perspective view which shows the structure of the stand state of the amplifier bench by this invention. It is a side view which shows the amplifier bench of a stand state. It is a side view which shows the structure of the amplifier bench of a conveyance state. It is a side view which shows the structure of the amplifier bench of a conveyance state. It is a perspective view which shows an example of a table. It is the top view which looked at the table from upper direction. It is a figure which shows the engagement state of a locking plate and a support | pillar.

  The amplifier bench according to the present invention is arranged on the stage of the performance hall, supports the amplifier at a predetermined height, is maintained in a stationary state with respect to the floor surface, and is in a state of carrying the amplifier to the performance hall. Used in two states. The amplifier bench according to the present invention includes a bench body 1, auxiliary legs 2 that support the bench body standing on the floor, and a table 3 on which the amplifier is placed. 1 to 4 show an example of an amplifier bench according to the present invention, and FIG. 1 shows a mode in which the amplifier bench is maintained in a stand state. The bench body 1 and the bench body maintained in a stand state except for the table 3 are shown in FIG. The supporting leg 2 to support is shown. FIG. 2 is a side view of the amplifier bench in the stand state, as viewed from the side in the stand state in which the amplifier 4 is placed on the table 3. 3 and 4 show the amplifier bench in the carrying state, FIG. 3 shows a resting state in which the amplifier bench is stationary with respect to the floor surface during carrying, and FIG. 4 shows the carrying state of the amplifier bench.

  Referring to FIG. 1, the bench body 1 has two columns 11 and 12 connected in parallel to each other. The pillars 11 and 12 are made of, for example, an aluminum pipe and are formed into a “U” shape by bending. Between the pair of columns 11 and 12, five connecting shafts 13a to 13e for connecting the table 3 to the bench main body are attached in parallel to each other at substantially equal intervals. An axle 14 is connected to the lower ends of the two columns 11 and 12. Wheels 15a and 15b having bearings built in are connected to both ends of the axle 14. The wheels 15a and 15b are composed of a pneumatic tire with a built-in bearing. When using pneumatic tires as wheels, even if there are irregularities on the floor or road, vibrations generated during transportation are absorbed by the pneumatic tires and only slight vibrations are generated. It is suitable for carrying. The wheels 15a and 15b are provided with a lock mechanism so that the wheels do not rotate in the stand state. Anti-vibration sheets 16a and 16b are attached to the two columns. As a material of the vibration-proof sheet, various vibration-proof materials such as a hard sponge and a vibration-proof rubber material can be used.

  The auxiliary leg 2 is constituted by a “U” -shaped pipe 17 formed by bending an aluminum pipe, for example, and both ends of the “U” -shaped pipe 17 are rotated around the two columns 11 and 12. Connect movably. The auxiliary leg 2 can occupy the first and second positions. When the amplifier bench is in the stand state, the auxiliary leg 2 rotates with respect to the columns 11 and 12, as shown in FIGS. To take a first state at a predetermined angle. Further, when the amplifier bench is in the transporting state, as shown in FIGS. 3 and 4, the second state becomes parallel to the columns 11 and 12.

  A braking member 19 is attached to the portion of the auxiliary leg 2 that contacts the ground contact surface 18. The braking member 19 is made of a material having a large friction coefficient such as a rubber material. By using a material having a large friction coefficient, a frictional force acts between the grounding surface 18 and the amplifier bench does not move in the front-rear direction during performance, and the amplifier can be stably held.

Referring to FIG. 2, the amplifier 4 is placed on a pedestal plate 3 a provided on the table 3. The pedestal plate 3a is made of an anti-vibration material such as a hard sponge or an anti-vibration rubber, and functions to absorb the vibration propagated to the table. The table 3 has two hook parts 20 and 21 (only the hook part 20 is shown in FIGS. 2 to 4), and any of the connecting shafts 13a to 13e provided with the hook part on the bench body. Engage with the crab. At this time, by selecting one of the connecting shafts, the arrangement height of the amplifier being played can be set to a desired height. That is, when the amplifier 4 is arranged at a high position from the floor surface , the hook portions 20 and 21 of the table 3 are engaged with the connecting shaft 13a positioned at the uppermost position, and the amplifier is disposed at a low position from the floor surface. In this case, the hook portion engages with the connecting shaft 13e positioned at the lowest position.

  By engaging the hook portion with the connecting shaft, the table 3 is connected to the bench body 1 so as to be rotatable about the connecting shaft. Locking plates 22 and 23 are rotatably connected to the table 3 (only the locking plate 22 is shown in FIGS. 2 to 4), and the locking plates 22 and 23 and the columns 11 and 12 are connected to each other. The angle of the mounting surface of the table 3 with respect to the columns 11 and 12 is defined by the engaging action. As shown in FIG. 2, when functioning as an amplifier bench, the angle θ of the mounting surface of the table 3 with respect to the columns 11 and 12 is set to an angle exceeding 90 °, for example, 120 °. As shown in FIGS. 3 and 4, when the amplifier is transported, the angle of the mounting surface of the table 3 with respect to the column is set to 90 °. This angle setting is defined by the engagement position between the locking plates 22 and 23 and the columns 11 and 12.

  As shown in FIG. 3, a stand leg 24 is rotatably connected to the table 3. The stand leg 24 can occupy two positions. The stand leg 24 is stored in the table 3 as shown in FIGS. 2 and 4, and the stand leg 24 is taken out from the table 3 as shown in FIG. It occupies a stand state perpendicular to the placement surface. In the stand state, the amplifier bench is kept stationary with respect to the floor surface by the stand legs 24 and the two wheels. Therefore, when the amplifier bench is stationary during transportation, the amplifier bench can be stationary with respect to the floor surface by taking out the stand leg 24.

Next, the table 3 on which the amplifier 4 is placed will be described. FIG. 5 is a perspective view showing an example of the table 3. In FIG. 5, only the table body is shown except for the locking plates 22 and 23. The table 3 has two plates 30 and 31 facing each other. Between these plates 30 and 31, connecting plates 32 and 33 having both ends formed in an L shape are fixed. Further, the connecting shaft 34 is fixed between the two plates. Both ends of the connecting shaft 34 protrude outward through holes formed in the plates 30 and 31. The protruding small-diameter portion is used as rotating shafts 34a and 34b that rotatably support the locking plates 22 and 23. In addition, the part which the connection shaft 34 and the plates 30 and 31 contact is fixed by welding, for example. Hook portions 20 and 21 are formed on the plates 30 and 31, respectively, and these hook portions are engaged with any of the connecting shafts 13a to 13e. The mounting surface of the table 3 is composed of connecting plates 32 and 33, on which a pedestal plate 3a that performs vibration isolation is disposed, and the amplifier 4 is mounted on the pedestal plate.

FIG. 6 is a plan view of the table 3 as viewed from above. As shown in FIG. 6, both ends of the connecting shaft 34 fixed to the plates 30 and 31 constitute rotating shafts 34a and 34b. The locking plates 22 and 23 are formed with holes that engage with the rotating shafts 34a and 34b, and the locking plates 22 and 23 are rotatably mounted on the rotating shafts 34a and 34b. The side surfaces of the locking plates 22 and 23 are used as locking surfaces. These locking surfaces engage with the columns 11 and 12, respectively, and the angle of the table mounting surface with respect to the columns is adjusted according to the engaged state. That is, in a state where the hook portions 20 and 21 of the plates 30 and 31 are engaged with the connecting shaft 13, the table 3 is rotated and the locking plates 22 and 23 are rotated to correspond to the locking plates 22 and 23. The locking surface is engaged with the columns 11 and 12. At that time, depending on which locking surface of the locking plates 22 and 23 is engaged with the column, the distance from the column to the rotating shafts 34a and 34b changes, and the angle of the table mounting surface with respect to the column is adjusted. Is done.

FIG. 7 is a view for explaining the operation of the locking plates 22 and 23. Since the two locking plates 22 and 23 perform the same operation, only one locking plate 22 will be described. FIG. 7A is a plan view showing the configuration of the locking plate 22. The locking plate 22 is formed of a relatively thick plate having a substantially triangular shape, and has a hole 22a that engages with a rotating shaft 34a provided in the table body. And it mounts | wears rotatably with respect to the rotating shaft 34a. The locking plate 22 has a first locking surface 22 b and a second locking surface 22 c that are side surfaces that engage with the support column 11. These locking surfaces are formed as concave engaging surfaces. The distance from the center of the rotating shaft 34a to the first locking surface 22b is set to r1, and the distance to the second locking surface 22c is set to r2. These distances r1 and r2 define an angle θ formed by the columns 11 and 12 on the mounting surface of the table 3. In this example, when the first locking surface 22b is engaged with the support column 11, the table mounting surface and the support column 11 occupy a stand state that forms an angle of approximately 120 °, and the second locking surface 22c is When engaged with the support 11, the table mounting surface is assumed to be in a transported state with an angle of 90 ° with respect to the support.

FIG. 7B is in a stand state that functions as an amplifier bench, and corresponds to FIG. FIG. 7C shows a transporting state that functions as a carry cart and corresponds to FIGS. 3 and 4. As shown in FIGS. 2 to 4, when the hook portion of the table main body is engaged with any of the connecting shafts 13 a to 13 e of the bench main body, the table main body rotates about the connecting shaft. The angle θ of the table mounting surface with respect to the column is defined by the amount of rotation of the table body. And the rotation angle position with respect to the support | pillar of a table main body is set by the 1st and 2nd locking surfaces 22b and 22c of the locking plate 22. FIG. Therefore, by appropriately setting the distance from the center of the hole 22a into which the rotating shaft 34a is fitted to the first and second locking surfaces 22b and 22c, the angle of the mounting surface of the table 3 with respect to the columns 11 and 12 can be changed. Can be prescribed. In this example, the distances r1 and r2 from the center of the hole 22a to the first and second locking surfaces 22b and 22c are set so that the angle of the table mounting surface with respect to the column is 120 ° and 90 °, respectively. To do.

Next, the operation of the amplifier bench shown in FIGS. 1 to 4 will be described. When the amplifier 4 is transported to the performance hall, the second locking surface 22c of the locking plate 22 attached to the table body is set to engage with the column, and the mounting surface of the table 3 is 90 ° with respect to the column. Set to make an angle of. Then, the amplifier 4 is placed on the table. Then, the amplifier 4 is fixed to the bench body 1 using a rope or the like. Next, as shown in FIG. 4, the bench body is tilted with respect to the ground plane 18, and in this state, the bench body is pulled in the direction of the arrow, whereby the amplifier and the amplifier bench can be carried together.

  Next, the operation of installing an amplifier on the stage at the performance venue will be described. The amplifier bench is placed at a predetermined position on the stage, the auxiliary leg 2 is separated from the bench body, the bench body is fixed, and the wheels are locked. Subsequently, the arrangement height of the amplifier is determined. The arrangement height of the amplifier is determined by selecting one of the connecting shafts 13a to 13e of the bench body 1. Next, the hook portions 20 and 21 of the table 3 are engaged with the selected connecting shaft. Subsequently, the locking plates 22 and 23 are rotated, their first locking surfaces are engaged with the columns 11 and 12, and the table 3 is fixed to the bench body. Subsequently, the amplifier 4 is arranged on the pedestal plate of the table 3, and the amplifier mounting operation is completed.

When the performance is finished, the amplifier 4 is removed from the table 3, and the hook portion of the table 3 is removed from the support shaft. Subsequently, the table 3 is connected to the lowest connecting shaft 13e. Further, the rotation position of the locking plate is adjusted, the second locking surface 22c is engaged with the column 11, and the table is set so as to form an angle of 90 ° with respect to the column. Finally, the amplifier 4 is placed on the table 3 and fixed with a rope or the like. In this state, the amplifier and the amplifier bench can be moved together by pulling the amplifier bench while tilting. In this state, the amplifier 4 is supported by a pedestal plate in the vertical direction and supported by a vibration isolation sheet provided on the support column in the horizontal direction. Since both the base plate and the vibration-proof sheet have a vibration-proof function, the amplifier is transported without being affected by vibrations in the vertical direction and the horizontal direction. In addition, since the vibration-proof material has a large friction coefficient, the problem that the amplifier during transportation is displaced is also eliminated.

1 Bench body 2 Auxiliary legs 3 Table 3a Pedestal plate
4 Amplifier 11, 12 Prop
13a-13e Connecting shaft
14 Axles 15a, 15b Wheels 16a, 16b Anti-vibration sheet 17 Pipe 18 Grounding surface 19 Braking members 20, 21 Hook
22, 23 Locking plate 24 Stand leg 30, 31 Plate 32, 33 Connecting plate 34 Connecting shaft 34a, 34b Rotating shaft

Claims (4)

A bench body having two columns extending in parallel with each other, a plurality of connecting shafts fixed to the two columns with a predetermined interval, and a wheel rotatably mounted at an end of each column;
An auxiliary leg that is pivotally connected to the bench body and occupies a first position that forms a predetermined angle with respect to the two struts and a second position that is parallel to the two struts;
A table that is detachably connected to the connecting shaft of the bench body and supports the amplifier,
The table selectively occupies a first position where the surface on which the amplifier is placed makes an angle of more than 90 ° with respect to the support and a second position where the table surface is substantially orthogonal to the support. It is possible,
When the auxiliary leg is set to the first position and the table is set to the first position, it functions as an amplifier bench that supports the amplifier at a predetermined height from the floor surface, and the auxiliary leg is the second position. When the table is set to the second position, the amplifier bench functions as a carry cart for carrying the amplifier.   2. The amplifier bench according to claim 1, wherein the table has a table body that forms a table surface that supports the amplifier and has a hook portion that engages with the connection shaft, and a latch that is rotatably connected to the table body. 3. And an amplifier bench that selectively occupies the first position and the second position according to the engagement position of the locking plate with respect to the support column.   The amplifier bench according to claim 1 or 2, wherein a pneumatic tire is used as the wheel, and vibration generated during transportation is absorbed by the pneumatic tire even if unevenness exists on a floor surface or a road. A characteristic amp bench. 4. The amplifier bench according to claim 1, wherein the table is made of an anti-vibration material, has a pedestal plate on which the amplifier is placed, A vibration-proof sheet composed of vibration material is provided, and the amplifier being transported is supported by the base plate and the vibration-proof sheet, and the vertical and horizontal vibrations are absorbed by the base plate and the vibration-proof sheet. Amplifier bench characterized by that.

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