JP5025014B2 - Flexible pipe manufacturing method and gooseneck type microphone device - Google Patents

Description

  The present invention relates to a manufacturing method of a flexible pipe and a technology related to a gooseneck type microphone device using a flexible pipe obtained by this manufacturing method as a support.

  The flexible pipe is manufactured by cutting a flexible pipe material formed in advance into a predetermined length based on a design, and is used by being incorporated in a gooseneck type microphone device or the like.

  In addition, the gooseneck type microphone device using the flexible pipe as a support for supporting the microphone unit is bent in a desired direction to move and adjust the microphone unit side to a suitable position determined by the relationship with the sound source (mouth). It can be used widely in conference halls.

FIG. 3 is an overall perspective view of the gooseneck type microphone device disclosed in Patent Document 1 below. In this case, the gooseneck type microphone device 1 fixes the base end side of the flexible pipe 5 as a support to the support base 2. And the whole is formed by attaching the microphone unit 3 to the front end side.
JP-A-9-229292

  FIG. 4 is an explanatory diagram showing a partially enlarged general cross-sectional structure of a flexible pipe conventionally used in a gooseneck type microphone device, in which (a) shows a cross-sectional state before cutting. (B) shows the cross-sectional state at the time of cutting, and (c) shows the cross-sectional state after a predetermined time has passed after cutting.

  In this case, the flexible pipe 5 can be plastically deformed with a round wire 6 made of a hard metal such as a steel material formed into a coil spring by densely winding in a cylindrical shape, and a triangular shape with one apex facing inward. A flexible pipe material 4 formed by combining a triangular wire 7 made of a simple metal such as a copper alloy is cut into a predetermined length.

  That is, as shown in FIG. 4A, the flexible pipe material 4 pulls the coil spring-like round wire 6 and sandwiches one apex side of the triangular wire 7 in a gap formed between them. Thus, it is formed by winding.

  For this reason, each flexible pipe 5 formed by cutting the flexible pipe material 4 as shown in FIG. 4B has a round wire rod at the contact portion 8 between the round wire rod 6 and the triangular wire rod 7 that bears the deformation restoring force. As a result of generating a strong frictional force against the restoring force 6, the deformed state when bent to an arbitrary position can be held by itself.

  However, in the flexible pipe 5 manufactured by cutting the flexible pipe material 4 to a predetermined length, the stress is released at the cut surface, so that the round wire 6 and the triangular wire 7 exposed on the cut surface are rewound. Will be caused.

  This rewinding occurs when the contact portion 8 is loosened because the triangular wire 7 side tends to be separated from the round wire 6, and as time passes, as shown in FIG. It spreads to the part which goes away, and finally reaches over the full length of the flexible pipe 5.

  For this reason, the flexible pipe 5 starts to expand from the vicinity of the cut surface due to rewinding at the same time as cutting, and the longer the waiting time until the assembly process with other members is designed, the more flexible pipe 5 is designed. Therefore, there is a disadvantage that it is difficult to connect with other members to be connected.

  Further, the flexible pipe 5 that has been unwound over its entire length has a reduced degree of pinching of the triangular wire 7, so that the frictional force generated at the contact portion 8 between the triangular wire 7 and the round wire 6 is reduced. By greatly decreasing, the restoring force of the round wire 6 will overcome the frictional force. This tendency is further promoted when the flexible pipe 5 is bent repeatedly.

  As a result, the flexible pipe 5 is incorporated as a support of the gooseneck type microphone device 1 and its bending is repeated, so that a so-called springing phenomenon occurs. For this reason, even if the gooseneck type microphone device 1 moves the microphone unit 3 to a desired position, the gooseneck type microphone device 1 cannot maintain the position after the movement and returns to the original position. .

In view of such problems in manufacturing flexible pipes, the applicant of the present application has proposed a “flexible pipe manufacturing method” in Patent Document 2 below.
JP 2008-67123 A

  The manufacturing method includes a combination step of forming a flexible pipe material by sandwiching a triangular wire in a gap between the round wires formed by pulling a coil spring-shaped round wire and winding it in the length direction thereof, and the flexible pipe The material is immersed in a water-soluble paint solution and electrodeposition is applied, and the round wire and the triangular wire are integrated so that the mutual contact parts are fixed in position through a coating film formed between them. The electrodeposition coating process is performed, and the flexible pipe material is cut into a flexible pipe having a predetermined length.

  For this reason, according to the above manufacturing method, the flexible pipe is integrated with the round wire and the triangular wire in a state where the mutual contact portions are fixed in position via the coating film interposed between them. After the electrodeposition coating process is completed, it is manufactured to a predetermined length through the cutting process, so that the contact area between the round wire and the triangular wire is covered with the coating film, so that the position is fixed. In addition, the diameter expansion in the vicinity of the cut surface and the rewinding of the full length portion can be stably suppressed over a long period of time.

  By the way, the flexible pipe raw material in the case of the manufacturing method of patent document 2 had to cut | disconnect using a cutter containing an abrasive grain and had to obtain a flexible pipe, since a round wire is a steel material.

  For this reason, when cutting a flexible pipe material with a cutter, the cutting portion becomes hot due to the frictional heat, and the coating film may be softened and the flexible pipe after cutting may be rewound as before. was there.

  SUMMARY OF THE INVENTION In view of the above-mentioned problems of the prior art, the present invention provides a method for manufacturing a flexible pipe and a gooseneck type microphone device that does not cause rewinding even when the flexible pipe is cut using a cutter containing abrasive grains. There is a purpose.

  The present invention has been made to achieve the above object, and the first invention (manufacturing method) of the present invention is the gap between the round wires formed by pulling a round wire made of a coil spring-like steel material. A combination process of forming a flexible pipe material by sandwiching a triangular wire made of iron or copper alloy and winding it in the length direction thereof, and the round wire and the triangular wire in the vicinity of the cutting position in the flexible pipe material At least a welding process for ultrasonic welding as a welding site, and a cutting process for cutting the welding site in the flexible pipe material with a cutter containing abrasive grains to obtain a flexible pipe of a predetermined length. And

  According to a second aspect of the present invention (microphone device), the main feature is that the flexible pipe manufactured by the manufacturing method according to claim 1 is incorporated in at least a part of a column supporting the microphone unit.

  According to the invention according to claim 1 of the present invention, the cutting position in the flexible pipe material is included in the welded part that has been ultrasonically welded, so that rewinding is not caused by a cutter containing abrasive grains. A flexible pipe can be manufactured by cutting. Therefore, each flexible pipe after cutting can surely prevent the occurrence of a so-called springing phenomenon, and can also be used stably by securely holding the electrical connection.

  Moreover, the flexible pipe material is used without changing the properties of the round wire material and the triangular wire material, which are constituent members, even if the cut site is heated at the time of cutting, since the remaining most of the site is not heated. be able to.

  Further, according to the invention of claim 2, since the flexible pipe having the cut end ultrasonically welded is used as a part of the support column, the electrical connection can be reliably incorporated and the bending can be performed. Even if this is repeated, the microphone unit can be stably moved to a desired position and used without causing a so-called springing phenomenon.

  FIG. 1 is an explanatory view showing the manufacturing process of the first invention of the present invention, of which (a) is a sectional state before cutting, (b) is a sectional state at the time of cutting, (C) shows the respective cross-sectional states after cutting and passing a predetermined time.

  That is, in the first invention, a triangular wire 14 made of iron or copper alloy is sandwiched between gaps between the round wires 12 and 12 formed by pulling a round wire 13 made of a coil spring-like steel material, and its length direction A combined process of forming the flexible pipe material 11 by wrapping around, and a welding process of ultrasonically welding the round wire 12 and the triangular wire 14 in the vicinity of the cutting position 16 in the flexible pipe material 11 as the welding part 17; Then, the cutting position 16 in the welded part 17 of the flexible pipe material 11 is cut with a cutter containing abrasive grains to obtain a flexible pipe 21 having a predetermined length.

  In this case, in the combination step, depending on which of the heavy load support and the light load support is used, either the triangular wire 14 made of iron or the triangular wire 14 made of copper alloy, The flexible pipe material 11 is formed by combining the round wire material 13 made of steel.

  And the flexible pipe material which consists of a combination of the combination of the triangular wire 14 which consists of iron, and the round wire 13 which consists of steel, and the combination of the triangular wire 14 which consists of copper alloys, and the round wire 13 which consists of steel 11, first, a welded portion 17 that reaches the vicinity of the cutting position 16 is determined as shown in FIG. In addition, the space | interval of the cutting positions 16 in the flexible pipe raw material 11 is suitably set as desired.

  Moreover, after supporting the welding site | part 17 in the flexible pipe raw material 11 between an anvil and a sound pole, an ultrasonic wave is given, applying a static pressure, and a to-be-joined interface is rubbed using the ultrasonic vibration in that case By passing through the above-mentioned welding process, the adjacent round wire 12 and triangular wire 14 are solid-phase joined.

  Moreover, in the above-described welding process, even if the flexible pipe material 11 is a combination of dissimilar metals such as a triangular wire 14 made of a copper alloy and a round wire 13 made of steel, the welding technique is ultrasonic welding. It can be surely welded.

  Further, in the cutting step, the cutting position 16 defined in the welded portion 17 of the flexible pipe material 11 is cut using a cutter containing abrasive grains, and a plurality of flexible pipes 21 having a predetermined length are manufactured. .

  Moreover, since each flexible pipe 21 immediately after cutting is integrated by welding the adjacent round wire 13 and the triangular wire 14 as shown in FIG. 1B, as shown in FIG. 4C. No rewinding occurs.

  And each flexible pipe 21 maintains the diameter dimension designed as shown in FIG.1 (c) even if predetermined time passes, and as a result, connection with the other member which is a connection object is smooth. Will be able to do.

  In addition, each flexible pie 21 can also maintain the frictional force generated at the contact portion 18 between the round wire 13 and the triangular wire 14 at a position excluding the welded portion 17, so that a so-called springing phenomenon does not occur. Can be bent repeatedly.

  FIG. 2 shows an example of the gooseneck microphone device according to the second invention formed so that the flexible pipe 21 manufactured according to the first invention can be incorporated into a part of a column and attached to a desk or the like. FIG.

  According to the figure, the entire gooseneck type microphone device 31 includes a column 33 that supports the microphone unit 32 on its upper end and functions as a stand arm, and a desk or the like disposed on the base end side of the column 33. And an attachment portion 38 that can be fixed in position, for example, by screwing it to an attachment material provided in advance.

  In this case, the strut 33 is a flexible pipe 21 having the structure shown in FIG. 1 connected to the base end side of the strut main body 34 via a connection pipe 36 and a strut main body 34 made of a metal pipe material having an appropriate length. It is integrally formed with the bent tube part 35 made of

  Next, the use of the gooseneck type microphone device 31 according to the second invention will be described together with the operation and effect of the flexible pipe 11 according to the first invention. This can be installed by fixing the position with respect to a mating member provided on a desk or the like.

  Further, when the speaker uses the gooseneck type microphone device 31, the position of the microphone unit 32 attached to the front end side of the column main body 34 constituting the column 33 faces the mouth (sound source). Is adjusted by the speaker.

  At this time, the position adjustment of the microphone unit 32 is performed via the bent tube portion 35 constituting the column 33. That is, the bent pipe body portion 35 made of the flexible pipe 21 is bent to the speaker side to bring the microphone unit 32 attached to the column main body portion 34 into a suitable position determined in relation to the mouth (sound source). And can be fine-tuned.

  In addition, the position adjustment by such bending is repeatedly performed every time different speakers are used. In this case, the bent tube portion 35 is formed using the flexible pipe 21 having the structure shown in FIG.

  Therefore, even if the bent tubular body portion 35 is bent, its posture can be stably maintained by the frictional force generated between the round wire 12 and the triangular wire 14.

  The above is the description of the present invention based on the illustrated example, and the specific configuration is not limited thereto. For example, the gooseneck type microphone device 31 according to the second invention is formed by using the flexible pipe 21 according to the first invention, or the support 33 having the flexible pipe 21 interposed at a plurality of locations. It can also be formed. Further, the gooseneck type microphone device 31 may include a support base as shown in FIG. 3 in place of the attachment portion 38 so that it can be placed on a desk, for example.

It is explanatory drawing which shows the manufacturing process of 1st invention among these, (a) is the sectional state before cutting, (b) is the sectional state at the time of cutting, (c) is Each of the cross-sectional states after cutting and passing a predetermined time is shown. It is explanatory drawing which shows an example of the gooseneck type | mold microphone apparatus based on 2nd invention formed by incorporating the flexible pipe shown in FIG. 1 in a part of support | pillar, of which (a) is a front cross-section structure, (b) Shows front views respectively. 1 is an overall perspective view of a gooseneck type microphone device disclosed in Patent Document 1 as a conventional example. It is explanatory drawing which expands and shows the general cross-section of the flexible pipe conventionally used for the gooseneck-type microphone apparatus partially, (a) is the cross-sectional state before a cutting process, (b) is (C) shows the cross-sectional state at the time of cutting, and shows the cross-sectional state after a predetermined time has passed after cutting.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Flexible pipe material 12 Round wire material 14 Triangular wire material 16 Cutting position 17 Welding part 18 Contact part 21 Flexible pipe 31 Gooseneck type microphone device 32 Microphone unit 33 Prop 34 Prop main part 35 Bending pipe part 37 Connection pipe 38 Attachment part

Claims (2)

A combination process of forming a flexible pipe material by sandwiching a triangular wire made of iron or copper alloy in a gap between the round wires made by pulling a round wire made of coil spring-like steel material and winding it in the length direction thereof; ,
A welding step of ultrasonic welding the round wire rod and the triangular wire rod in the vicinity of the cutting position in the flexible pipe material as a welding portion;
A method for manufacturing a flexible pipe, comprising at least a cutting step of cutting the welded portion of the flexible pipe material with a cutter containing abrasive grains to obtain a flexible pipe having a predetermined length. A gooseneck type microphone device, wherein the flexible pipe manufactured by the manufacturing method according to claim 1 is incorporated in at least a part of a column supporting a microphone unit.

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