JPH054695U - Polyhedral speaker / cabinet and its suspension device - Google Patents

Abstract

(57) [Summary] (Modified) [Configuration] Each speaker cabinet 12, a bolt 16 protruding from the top thereof, and a connecting piece 26a having a through hole 26b are provided at both ends of the speaker cabinet 12. A metal reinforcing frame 26 integrally provided along the front edge of the cabinet 12 and an angle adjusting / fixing plate 32 having through holes 32a into which the projecting bolts 16 are fitted are formed at regular intervals. Shi: The connecting piece 26 of the metal reinforcing frame 26 at the front edge portion adjacent to each other
a, a polyhedron speaker cabinet 10 in which a plurality of the speaker cabinets 12 are connected in an adjustable angle via the projecting bolts 16 and the angle adjusting and fixing plate 32 into which the projecting bolts 16 are fitted. Is. [Effects] Spherical arrangement and connection by simple construction facilitates hanging and fixing, adjustable directivity characteristics of sound to obtain desired acoustic effect, and even when arranged adjacently, there is no phase interference of sound, Adjustments and expansions after installation will be easy.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyhedron speaker cabinet and its connecting suspension device, and more particularly to various halls, large-scale outdoor concert venues, gathering venues, and the like. The present invention relates to a polyhedron speaker cabinet in which a plurality of speaker cabinets are spherically arranged and connected by simple construction, and in particular, the directional characteristics of sound can be adjusted to obtain a desired acoustic effect, and a connecting suspension device thereof. A sound wave generated from one point propagates in the air as a spherical wave and propagates, and is attenuated in inverse proportion to the square of the distance. A sound source with high sound pressure and wide uniform directional characteristics is required to transmit sound in a wide range, and the sound source should be placed at a high position as much as possible in order to reduce the influence from the audience and structures in order to improve the clarity of the sound. Need to be installed. A speaker cabinet, which is a sound source, cannot obtain the required sound pressure and wide directional characteristics with one unit, and the directional characteristics cannot be changed. Therefore, it is necessary to use multiple speaker cabinets side by side. ~ For tens of thousands of people gathering and concerts, several to several tens of speaker cabinets must be installed. (1) In a hall, a gathering hall, etc., a plurality of speaker cabinets (for example, a polyhedron speaker, for example, the real public Sho 59-31105, the real public Sho 59-41679, etc.) may have nearby sound sources such as phase interference. In order to prevent adverse effects, they are arranged in a spherical shape or a fan shape. In a conventional large-scale building (hall, baseball field, public facility, etc.), a dedicated framer (speaker cluster) designed to accurately diffuse sound is manufactured in advance, and the speaker cabinet is attached to the framer. Is attached and fixed. (2) In the construction of medium to small-scale buildings, (a) a stand is provided on a wall, a ceiling, a beam, etc., and a speaker cabinet or the like is installed on the stand. (B) A hole is bored in a required portion of the speaker cabinet, and the speaker cabinet is fixed to a wall, a ceiling, a beam or the like via a bolt, a nut wire, or the like. (3) In the case of simple building construction, attach a commercially available small speaker cabinet by fixing the accessory dedicated suspension aid (bracket) to the wall, ceiling, beam, pipe, etc. (as an example of a fixture) Is Jikkou 60-33667). The suspending device for this purpose is a detachable fixing bracket for an aircraft or an aerial clip, which is an easy-to-detach fixed suspending bracket device conforming to the US military standard (MIL.). It is fixed below. For the upper suspension frame, dedicated fan-shaped array suspension devices have been proposed (ELECTRO VOICE, TURBO SOUND, JBL., Etc.). (4) In temporary audio equipment (large-scale outdoor concert venues, meeting venues, etc.), there are many speaker cabinets that are recently manufactured for large-scale temporary audio equipment (mainly for concerts). , Various measures have been taken so that it does not take time to remove. As described above, in the known polyhedron speaker cabinet and the connecting suspension device thereof, the following various drawbacks have occurred. (1) In a venue, a gathering place, etc., it is necessary to devise various constructions to fix the spherical or fan-shaped array suspension of these plural speaker cabinets, and great efforts are made to obtain an appropriate acoustic effect. Will be needed. For this reason, it requires considerable careful setup, careful design, adjustment and expansion after installation are extremely difficult, and moreover, a scaffolding is required for the construction, renovation work is also required, and the construction is large-scale and expensive. Inevitably, the biggest defect was that the directional characteristics of sound could not be changed, especially because each speaker cabinet was fixed. (2) Sound waves generated from multiple sound sources installed side by side interfere with each other to produce peaks (peaks) and dips (valleys) due to the path difference (phase interference), and become more prominent in the high frequency range with shorter wavelengths. It has a great influence on the frequency vs. directional characteristics, and has a leaf-shaped sound pressure directional characteristic of the millipede, which causes adverse effects such as a difference in clarity depending on the listening position. (3) In a conventional large-scale building (hall, baseball field, public facility, etc.), a plurality of speaker cabinets are focused in the desired direction by an extension line at the center of the diaphragm surface of each speaker cabinet. As described above, it is extremely difficult to fix the spherical or fan-shaped arrangement, and it is also difficult to add or remove it. (4) In medium-to-small-scale building construction, it was easy to attach and fix, but the required sound pressure was not obtained and sufficient safety was not obtained. (5) In a simple building construction, the speaker cabinet has a rectangular or trapezoidal shape, so it can be relatively arranged in a fan shape, but the spherical arrangement requires a large suspension device. It was Although various measures have been taken to arrange adjacent speaker cabinets through brackets having such a special shape, most of them can only arrange 2 to 4 speaker cabinets in parallel. , If you needed more sound pressure, you had to replace it with a stronger speaker cabinet. The present invention eliminates various drawbacks of the above-described polyhedral speaker cabinet and its suspension connecting device, and its gist is to project each speaker cabinet and its top part. The protruding bolts are fitted to the metal reinforcing frame integrally provided along the front edge of the speaker cabinet, which has the bolts provided and the connecting pieces having the through holes at both ends. And an angle adjusting and fixing plate in which through holes are formed at regular intervals; the connecting piece of the metal reinforcing frame of the adjacent front edge portion, the projecting bolt, and the projecting bolt are fitted together. It is a polyhedral speaker cabinet in which a plurality of the speaker cabinets are connected to each other via the angle adjusting and fixing plate so that the angle can be adjusted. Embodiments of the invention described in each claim of the utility model registration claim will be described with reference to the accompanying drawings. 1. Each of the speaker cabinets 12 and 12 constituting the polyhedral speaker cabinet 10 according to claim 1, claim 3, and claim 6 is a substantially quadrangular pyramid, as shown in FIGS. A bolt unit 16 is screwed and fixed in a screw hole 14a formed in the flat portion 14 on the top of the glass fiber reinforced plastic body 12a so as to project outward, and a speaker unit to be described later is centered in front of the plastic body 12a. A plywood 20 is provided which forms a baffle surface having a circular opening 20a provided with 24 and a small through hole 20b as desired. The plywood 20 is integrally attached to the front surface of the speaker cabinet 12 so that the cabinet 12 and the plywood 20 are integrated. The metal reinforcing frame 26 having a length substantially corresponding to one side of the substantially four-sided pyramid is provided with connecting pieces 26a having a through hole 26b at the center at right angles at both ends, and three metal reinforcing frames 26 are provided. Are integrally formed as a triangle along the front edge of the speaker cabinet 12. As shown in FIG. 8, the speaker cabinets 12 and 12 are brought into contact with each other at the front edge portions 12b and 12b, and the connecting pieces 26a and 26a of the opposing metal reinforcing frames 26 and 26 are brought into contact with each other. A bolt 28 is fitted into the through holes 26b, 26b of the connecting pieces 26a, 26a, a nut 30 is screwed into the bolt 28, and the connecting piece 26a, 26a is pivotally supported about the fulcrum. The angles of the speaker units 24, 24 provided in front of the cabinets 12, 12 can be adjusted with respect to a required venue, a meeting place, etc. In FIG. 6, the bolts 16, 16 of the pair of speaker cabinets 12, 12 are formed in through holes 32 a, 32 a, ... After fitting, the desired angle of the speaker cabinet 12, 12 is selected, the angle is adjusted, and the nut 30 is screwed and fixed to the bolt 16, 16. As shown in FIGS. 7 and 8, a plurality of spherical surfaces are provided so that the center of the plywood 20 which is the baffle surface of each speaker cabinet 12, 12 described in claim 2 and the sound source are focused at the rear. Alternatively, the polygonal speaker cabinet 10 is formed by fan-shaped arrangement and connecting the metal reinforcing frame 26, the angle adjusting / fixing plate 32, and the nut 30 so that the angle can be adjusted. Then, as shown in FIG. 14, the plurality of speaker cabinets 12, 12, ... Are arranged in a spherical or fan shape so that the center lines x, x ,. According to another aspect of the present invention, as shown in FIG. 9, each speaker body of the described polyhedral speaker cabinet 12 has a polygonal pyramid shape. According to the fifth aspect of the present invention, as shown in FIG. 11, the polyhedral speaker cabinets 10, 10 ... Are mounted via a metal reinforcing frame 26 and a hanging tool 34 such as a wire rope. It can be suspended by connecting it to the required height with adjustable angles. In FIG. 10, for connection, at each corner of each speaker cabinet 12 of the polyhedral speaker cabinet 10 according to claim 7, through holes 27 b are formed at both ends along the front edge of the speaker cabinet 12. A metal reinforcing frame 27 having a piece 27a is integrally provided so that it can be connected to the adjacent speaker cabinets 12, 12. 12 and 13, a nut 15 is provided in a screw hole 14a formed in the center of a flat surface portion 14 at the top of each speaker cabinet 12 of the polyhedral speaker cabinet 10 according to claim 8. A power supply terminal 17 is embedded in a step portion 14c formed in the vicinity of a ridgeline 14b extending from the flat surface portion 14 and further extending on the ridgeline 14b at each corner of the front edge of each speaker cabinet. A nut 15 is embedded in the formed recess 14d, and connecting pieces 19 and 19 having through holes 19a and 19a are brought into contact with the nuts 15 and 15, respectively, and bolts 28, 28 ... The speaker cabinets 12 and 12 are connected. Similar to FIG. 11, the polyhedron speaker cabinet 10 according to claim 9 is provided with a required height through a suspending tool 34 such as a wire rope as in the case of claims 7 and 8. The angle can be freely adjusted to connect and hang. According to the polyhedron speaker cabinet and the connecting suspension device according to the present invention, as shown in FIG. 14, a large number of polyhedron speaker cabinets 10, 10 ... The array can be suspended. EFFECTS OF THE INVENTION (1) It is extremely easy to suspend and fix a spherical or fan-shaped array of a plurality of polyhedral speaker cabinets 10, 10 ... Therefore, adjustments and expansions after installation are easy, and a simple scaffold is sufficient for installation work, the required sound pressure and wide directional characteristics are obtained, and the directional characteristics of sound can be changed. (2) The sound waves generated from a plurality of closely-arranged polyhedron speaker cabinets 10, 10 ... Have no phase difference, so phase interference is eliminated, and the directional characteristics of the sound can be adjusted to obtain the desired acoustic effect. Be done. (3) Even in a large-scale building, a plurality of polyhedron speaker cabinets may be fixed in a spherical or fan-shaped array in a desired direction so that the center line of the diaphragm surface of each speaker cabinet is focused behind. It will be easier, and it will be easier to add or remove it. (4) Even in the construction of medium to small-scale buildings, it is easy to attach and fix, a desired sound pressure can be obtained, and sufficient safety can be obtained, so that there is no difference in clarity even at the listening position. (5) In simple building construction, since the speaker cabinets are rectangular or trapezoidal, they can be relatively arranged in a fan shape. At the same time, there is no need for a large suspension device for the spherical array. [0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1a is a perspective view of a plywood forming a baffle surface of each speaker cabinet constituting the polyhedral speaker cabinet according to the present invention. 1b is a perspective view of a speaker cabinet to which the baffle surface of FIG. 1a is attached. FIG. 1c is a perspective view of a metal reinforcing frame attached to the speaker cabinet of FIG. 1b. FIG. 2 is a front view of a speaker cabinet configured by combining the members shown in FIGS. 1a, 1b, and 1c. 3 is a schematic rear view of the speaker cabinet shown in FIG. 2. FIG. 4 is a schematic right side view of FIG. 3. FIG. 5 is a partially cutaway enlarged perspective view of the speaker cabinet shown in FIG. 2. FIG. 6 is a perspective view of a combination of a pair of speaker cabinets of FIG. 2 and FIG. 2 as viewed from the rear of the rear surface. FIG. 7 is a perspective view of a combination of three speaker cabinets as viewed from the back and rear side. 8 is a perspective view of a metal reinforcing frame for assembling the speaker cabinet of FIG. 7. FIG. FIG. 9 is a perspective view showing a polygonal pyramid as a polyhedral speaker cabinet. FIG. 10 is a perspective view of another embodiment of a polyhedral speaker cabinet. FIG. 11 is a perspective view showing a state in which a polyhedron speaker cabinet is connected to a required height by a metal reinforcing frame and a suspending tool such as a rope so that the angle can be adjusted and the suspension is performed. FIG. 12 is a perspective view of yet another embodiment of a polyhedral speaker cabinet. FIG. 13 is a partially exploded perspective view of the rear view of FIG. FIG. 14 is a schematic plan view in which a plurality of speaker cabinets are fan-shaped so that an extension line connecting a center of a baffle surface of each speaker cabinet of a polyhedral speaker cabinet and a sound source is focused at a rear side. 10 ... Polyhedron speaker cabinet; 12 ... Each speaker cabinet; 12a ... Glass fiber reinforced plastic body; 14 ... Top plane portion; 14a ... Screw portion at center of plane portion; 14b ... Ridge line; 14c ... Step portion; 14d ... Recessed portion; 15 ... Nut; 16 ... Top bolt; 17 ... Power supply terminal; 19 ... Connection piece; 19a ... through hole; 20 ... plywood; 20a ... circular opening; 20b ... small through hole; 24 ... speaker unit; 26 ... metal reinforcing frame; 26a ... connection 26b ... Through hole; 27 ... Connecting piece; 27a ... Through hole; 28 ... Bolt; 30 ... Nut; 32 ... Angle adjusting and fixing plate; 32a ... -Through hole; 34 ... Hanging tool.

Claims (1)

[Claims for utility model registration] [Claim 1] Each speaker cabinet, a bolt projecting from the top of the speaker cabinet, and a connecting piece having a through hole formed at both ends, and the front of the speaker cabinet. It has a metal reinforcing frame integrally provided along the edge portion and an angle adjusting and fixing plate having through holes for fitting the projecting bolts formed at regular intervals; A plurality of the speaker cabinets are connected in an adjustable angle through the connecting piece of the metal reinforcing frame, the projecting bolts, and the angle adjusting and fixing plate into which the projecting bolts are fitted. Polyhedral speaker cabinet. 2. A plurality of spherical or fan-shaped arrays are arranged so that an extension line connecting the center of the diaphragm surface of each of the speaker cabinets and the sound source is focused at the rear, and the angle adjusting and fixing plate is interposed. A polyhedron speaker cabinet with adjustable angles. 3. The polyhedral speaker cabinet according to claim 1, wherein each of said speaker cabinets has a substantially triangular pyramid shape. 4. The polyhedral speaker cabinet according to claim 1, wherein each of said speaker cabinets has a polygonal pyramid shape. 5. A connecting and suspending device for a polyhedron speaker cabinet, wherein the connecting and suspending device can be freely connected and suspended at a required height through the metal connecting and reinforcing frame and a suspending tool. 6. A polyhedron speaker cabinet according to claim 1, wherein a peripheral body of each speaker cabinet is made of glass fiber reinforced plastic, and a front portion on which the speaker unit is provided is made of plywood. 7. A speaker cabinet, a nut embedded in the top of the speaker cabinet, and a connecting piece having a through hole formed at both ends, and integrally provided along the front edge of the speaker cabinet. A metal reinforcing frame and an angle adjusting and fixing plate in which through holes for fitting projecting bolts screwed into the nut are formed at regular intervals; A polyhedron speaker in which a plurality of the speaker cabinets are connected to each other through the connecting piece of the reinforcing frame, the projecting bolts, and the angle adjusting and fixing plate into which the projecting bolts are fitted so as to be adjustable in angle. ·cabinet. 8. The speaker cabinet, a nut embedded in the top of the speaker cabinet, a power supply terminal provided in a step formed near the top on a ridge line extending from the top, and the same. A speaker embedded on a ridgeline in a recess formed in a corner of its front edge, a connecting piece having a through hole provided in the recess, and a bolt;
A polyhedral speaker cabinet made by connecting speakers. 9. A polyhedron speaker cabinet connection according to claim 7, wherein the polyhedron speaker cabinet is connected via a hanging tool so as to be adjustable in angle to a required height and can be hung. Hanging device.