JP6142972B1 - End pin fixture - Google Patents

Abstract

An end pin fixing tool capable of sufficiently fixing an end pin without disturbing the balance of the musical instrument. An end pin fixing tool 100 includes a base 110 that is detachably attached to the cello CH, and a socket 120 that is detachably attached to the base 110 and holds the end pin CH. The pedestal 110 has a through hole 110 a that penetrates in the axial direction and into which the socket 120 is inserted. The socket 120 is provided with an end pin accommodating portion 120a for accommodating the end pin EP and a notch 120b for reducing the diameter in the axial direction. When the socket 120 is inserted into the through hole 110a of the pedestal 110 in a state in which the end pin EP is accommodated in the end pin accommodating part 120a, the end pin accommodating part 120a crimps the end pin EP by reducing the diameter by the action of the notch 120b. And fix. [Selection] Figure 2

Description

  The present invention relates to an end pin fixing tool for fixing an end pin used for a stringed musical instrument or a woodwind musical instrument to the musical instrument.

  The end pin is a rod-shaped part that is attached to the bottom of a stringed instrument or a woodwind instrument (hereinafter also simply referred to as an instrument) and supports the instrument on the floor. In addition to supporting the instrument, the end pins have the role of amplifying the sound by transmitting vibrations to the floor. Conventionally, end pin fixtures for fixing end pins to musical instruments are mainly made of ebony or rosewood pedestals, and the end pins are pushed up with screws built into the pedestals or barrels built into the pedestals. The end pin is pressed against the wall of the pedestal by being pulled with a screw (for example, see Patent Document 1).

JP 2001-215953 A

  However, in the conventional screw-type end pin fixing tool, since the weight is applied to the outside from the center of the musical instrument main body, the balance of the musical instrument is upset. Further, because of the method of pushing, pulling, and pinching the end pin at one point, a gap (play) is created in the pedestal, and the end pin cannot be fixed sufficiently.

  Therefore, the present invention has been made in view of such problems, and an object of the present invention is to provide an end pin fixing tool capable of sufficiently fixing an end pin without disturbing the balance of the musical instrument. .

  In order to solve the above problems, according to the present invention, there is provided an end pin fixing tool for fixing an end pin to a musical instrument such as a stringed musical instrument or a woodwind musical instrument, the first member being detachably attached to the musical instrument, and the first member A second member that is detachably attached to one member and holds the end pin, wherein the first member has a through hole that penetrates in the axial direction and into which the second member is inserted, and the second member. The member is provided with an end pin housing portion for housing the end pin and a notch for reducing the diameter in the axial direction, and the through hole of the first member and the outer periphery of the second member are disposed in the axial direction. When the second member is inserted into the through hole of the first member in a state where the end pin is accommodated in the end pin accommodating portion, the diameter of the second member is reduced by the action of the notch. To Wherein the pin receiving portion is fixed to crimping the end pin, the end pin fixtures is provided.

  According to this configuration, the notch for reducing the diameter is provided in the second member, and the end pin is inserted into the through hole of the first member in a state where the end pin is accommodated in the end pin accommodating portion of the second member. Only the diameter of the second member is reduced, and the end pin can be crimped and fixed. For this reason, the handling of the end pin fixture is easy. And unlike the conventional screw type, since no weight is applied to the outside of the center of the instrument body, adverse effects on the instrument can be avoided. Furthermore, when the musical instrument is used, a force is applied in the direction in which the end pin is crimped, so that the end pin can be sufficiently fixed.

  Further, the through hole of the first member and the outer periphery of the second member have inclined surfaces with respect to the axial direction. In order to make the notch of the second member act in the present invention, it is only necessary that the diameter of at least a part of the outer periphery of the second member is larger than the through hole of the first member. For example, various methods such as providing a step or a protrusion on at least one of the through hole of the first member and the outer periphery of the second member can be employed. In such a method, if the configuration is such that the through hole of the first member and the outer periphery of the second member have an inclined surface (tapered surface) with respect to the axial direction, manufacturing of the component is easy.

  The present invention can be applied in various ways. The following application examples can be combined as appropriate.

  For example, the inclined surface of the through hole of the first member and the inclined surface of the outer periphery of the second member may be inclined at the same angle with respect to the axial direction. According to such a configuration, the outer peripheral surface of the second member is almost uniformly adhered to the through hole of the first member, and the second member and the end pin can be fixed with the entire first member, so that the end pin is sufficiently fixed. Can do. Here, the same angle inclination may be an angle when the diameter of the second member is reduced, or may be an angle when the diameter is not reduced.

  Moreover, the 1st extraction assistance part which assists the operation | movement which draws out the said 1st member may be provided in the edge part vicinity of the said 1st member. As such an extraction auxiliary part, a structural one or a material one can be considered. For example, it is conceivable to provide a grip portion, a step, a groove, etc., and hold it with a hand or hook it with a finger. Moreover, as a material thing, a non-slip process, the sticking of a non-slip member, etc. can be considered. In the present invention, the member attaching operation is simple, but on the other hand, it is conceivable that the member extracting operation is difficult. Therefore, the first member can be easily extracted from the musical instrument by providing the first extraction assisting portion.

  Further, from the same viewpoint, a second pulling assisting part for assisting the operation of pulling out the second member may be provided in the vicinity of the end of the second member. By providing the second extraction assisting portion, the second member can be easily extracted from the first member.

  The first member and the second member are preferably made of wood. In the conventional method of rotating together with the pedestal or the method of fastening with screws, the material must be heavy and dull, but in the present invention, it can be made of light wood. And if it is a wooden member, it has a certain deformation | transformation property, flexibility, and a softness | flexibility, and it is suitable for attachment or extraction of components. Thus, there is a technical synergistic effect in adopting the wooden member in the present invention. More specifically, it is more preferable to use a fernanbuco material that is also used for a light and quick reaction material such as a bow material.

  ADVANTAGE OF THE INVENTION According to this invention, it is possible to provide the end pin fixing tool which can fully fix an end pin, without disturbing the balance of a musical instrument. Other effects of the present invention will also be described in a mode for carrying out the invention described later.

It is a figure showing roughly the state where end pin fixture 100 was attached to cello CH. It is a figure which shows the state which removed and isolate | separated the end pin and the end pin fixing tool from the cello, (a) is the base 110, (b) is the socket 120, (c) is the end pin EP. 3 is a perspective view of a pedestal 110. FIG. 4 is a perspective view of a socket 120. FIG. It is a figure which shows the state which inserted the end pin EP in the socket 120, (a) is a side view, (b) is AA sectional drawing of (a). It is a figure which shows the state which inserted the socket 120 and the end pin EP in the base 110, (a) is a side view, (b) is BB sectional drawing of (a).

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol.

  First, general items of the end pin will be described. The end pin (English: spike) is a rod-shaped part that stands on the floor and supports the musical instrument at the bottom of the musical instrument. In addition to supporting the instrument, the end pins have the role of amplifying the sound by transmitting vibrations to the floor. End pins are often sharp on the floor due to the characteristics of standing on the floor, but in order to prevent slipping and not damage the floor, use a rubber cap or place a dedicated stopper on the floor, Push the end pin on it. In the following description, description will be made mainly on the end pin fixing tool for fixing the end pin, and description of items having a low relationship with the features of the present invention such as a cap and a stopper will be omitted.

  Hereinafter, an embodiment of the present invention will be described. Hereinafter, for convenience of explanation, a cello will be described as an example of an instrument. First, the structure of the end pin fixture 100 of this embodiment is demonstrated, referring FIGS. 1-4.

  FIG. 1 is a diagram schematically showing a state in which the end pin fixing tool 100 of the present embodiment is attached to an end pin insertion port of the cello CH. FIG. 2 is a view showing a state in which the end pin EP and the end pin fixture 100 are detached from the cello CH and separated. As shown in FIGS. 1 and 2, the end pin fixture 100 includes a pedestal (first member) 110 and a socket (second member) 120. Hereinafter, each component of the end pin fixture 100 will be described in detail.

(Pedestal 110)
The pedestal 110 is a structural example of the first member of the present invention, FIG. 2 (a) is a perspective view, and FIG. 3 is a perspective view. The pedestal 110 has a total axial length of 80 mm and can be made of, for example, wood. As shown in FIGS. 2A and 3, the pedestal 110 includes an insertion portion 112 that is a portion that is inserted into the cello CH, and a contact portion that is a portion that contacts the cello CH when inserted into the cello CH. 114, a groove 116, and a grip portion 118. As shown in FIGS. 2A and 3, the pedestal 110 is provided with a through hole 110 a that penetrates in the axial direction and into which a socket (second member) 120 described later is inserted.

  The through hole 110a penetrates the pedestal 110 in the axial direction as shown in FIGS. The through hole 110a has a diameter of 18 mm on the small diameter side and a diameter of 23 mm on the large diameter side, and forms a tapered surface. Due to the tapered surface of the through hole 110a, when the socket 120 described later is inserted into the through hole 110a, the socket 120 is pressed in the radial direction as the socket 120 is inserted deeper.

  The insertion part 112 is a part inserted into the cello CH. As shown in FIGS. 2A and 3, the insertion portion 112 has a conical shape to be loaded into a musical instrument, and has an appropriate size (for example, an axial direction) that can be inserted into an end pin insertion opening of the cello CH. The length is about 50 mm).

  When the pedestal 110 is inserted into the cello CH, the abutment part 114 abuts against the surface of the cello CH, preventing further entry of the pedestal 110 into the cello CH, and preventing impact and damage. Or to improve the design. The abutting portion 114 is formed continuously with the insertion portion 112, has a diameter that is larger than that of a nearby portion, and is formed in a donut shape over the entire circumference of the pedestal 110. The contact portion 114 has a larger diameter than the end pin insertion port of the cello CH. For this reason, it can contact | abut on the surface of cello CH, and the approach to the inside of cello CH beyond the base 110 can be prevented.

  The groove 116 is formed continuously with the contact portion 114, and is formed over the entire circumference of the pedestal 110. The groove 116 makes it easy to pull out the pedestal 110 from the cello CH. In addition, a tail gut (not shown) of the cello CH can be hooked in the groove 116. If the width of the groove 116 is about 5 to 6 mm, for example, the drawing operation is easy.

  The grip portion 118 is a portion that is formed continuously with the groove 116 and has a locally larger diameter (for example, a diameter of 30 to 35 mm) than a nearby portion. The grip portion 118 is configured to have a larger diameter than a nearby portion so as to be easily gripped when the pedestal 110 is pulled out from the cello CH or a socket 120 described later is pulled out from the pedestal 110. In this respect, the grip portion 118 functions as a pullout auxiliary portion (first pullout auxiliary portion). In order to make it easier to grip the grip portion 118, the shape of the grip portion 118 may be a shape like a bobbin whose diameter in the center in the axial direction is narrower than both end portions. Moreover, the crack of wood can be prevented by covering the grip part 118 with a metal such as brass to improve the strength.

  The configuration of the pedestal 110 has been described above with reference to FIGS. Next, the configuration of the socket 120 will be described.

(Socket 120)
The socket 120 is a structural example of the second member of the present invention, FIG. 2B is a perspective view, and FIG. 4 is a perspective view. The socket 120 has a total axial length of 85 mm and can be made of wood. As shown in FIGS. 2B and 4, the socket 120 includes an insertion portion 122 that is a portion to be inserted into the pedestal 110 and a grip portion 124. As shown in FIGS. 2B and 4, the socket 120 is provided with an end pin accommodating portion 120 a for accommodating the end pin EP and a notch 120 b for reducing the diameter in the axial direction. The side is smaller than the through-hole 110a of the pedestal 110, and the large-diameter side is a substantially truncated cone shape larger than the through-hole 110a.

  The end pin accommodating portion 120a is a hole that penetrates the socket 120 in the axial direction, as shown in FIGS. The inner diameter of the end pin accommodating portion 120a is a parallel surface that is substantially the same as or slightly larger than the diameter of the end pin EP shown in FIG. For this reason, the end pin accommodating part 120a can take in and out the end pin EP smoothly. Further, the end pin accommodating portion 120a is excellent in holding force because the end pin EP can be held by the entire inner diameter of the end pin accommodating portion 120a when the end pin accommodating portion 120a is reduced in diameter and crimped to the end pin EP.

  The end pin accommodating portion 120a is coaxial with the pedestal 110 when the socket 120 is inserted into the through hole 110a of the pedestal 110. Therefore, the end pin EP held in the end pin accommodating portion 120a is also coaxial with the pedestal 110. Therefore, the center of the cello CH and the axis of the end pin EP can be matched.

  As shown in FIGS. 2B and 4, the notch 120 b is a kind of burrs provided on the entire axial direction of the socket 120. When the socket 120 is inserted into the through hole 110a of the pedestal 110 in a state where the end pin EP is accommodated in the end pin accommodating portion 120a, the diameter of the socket 120 is reduced by the action of the notch 120b, whereby the end pin accommodating portion 120a crimps the end pin EP. And is configured to be fixed. The width of the notch 120b is preferably the same throughout the entire axial direction of the socket 120.

  The insertion part 122 has a substantially truncated cone shape as shown in FIGS. The insertion portion 122 is 19 mm on the small diameter side and 24.5 mm on the large diameter side, and forms a tapered surface. The tapered surface has substantially the same inclination as the tapered surface of the through hole 110a of the pedestal 110 described above. By having such a taper, when inserted into the through hole 110a of the pedestal 110, a force acts in a direction in which the notch 120b is closed and the socket 120 is reduced in diameter. And the insertion part 122 of the socket 120 is compressed with the whole taper surface which comprises the through-hole 110a.

  As shown in FIGS. 2B and 4, the grip portion 124 is a portion having a diameter larger than that of the nearby portion, and serves as a pull-out auxiliary portion (second pull-out auxiliary portion) when the socket 120 is pulled out. Function. By providing the grip portion 124 in the socket 120, even a person who does not have a force such as ease of gripping and ease of pushing in can easily use it. The grip portion 124 also contributes to improving the design. As described above, the grip portion 124 is configured to improve functionality.

  Note that the end pin EP not described in FIG. 2 is different from a general end pin (generally, a metal pin of 8 mm or 10 mm is mainstream), as shown in FIG. The diameter of EP is about 14.5 mm, and the total length is about 520 mm. The material of the end pin EP is wooden as an example.

The configuration of the end pin fixture 100 has been described above with reference to FIGS.
Next, a method of using the end pin fixing tool 100 will be described with reference mainly to FIGS. 5A and 5B are views showing a state in which the end pin EP is inserted into the socket 120, FIG. 5A is a side view, and FIG. 5B is a cross-sectional view taken along line AA in FIG. 6A and 6B are views showing a state in which the socket 120 and the end pin EP are inserted into the pedestal 110, FIG. 6A is a side view, and FIG. 6B is a cross-sectional view taken along line BB in FIG. .

  First, an operation for attaching the end pin EP to the cello CH will be described.

  As shown in FIG. 5A, the end pin EP is attached to the socket 120. At this stage, as shown in FIG. 5B, the inner diameter of the end pin accommodating portion 120a of the socket 120 is not reduced, and the inner diameter of the end pin accommodating portion 120a of the socket 120 is larger than the diameter of the end pin EP. The end pin EP can be inserted and removed smoothly. The relative position between the socket 120 and the end pin EP is adjusted.

  Then, as shown in FIG. 6A, the socket 120 with the end pin EP attached is attached to the base 110. As a result, as shown in FIG. 6B, the inner diameter of the end pin accommodating portion 120a of the socket 120 is reduced, and the end pin EP is pressed and fixed. Further, the socket 120 is configured to protrude from the grip portion 118 of the pedestal 110 because the small diameter side of the insertion portion 122 is configured to be thicker than the small diameter side of the through hole 110 a of the pedestal 110. In this way, by pulling out the portion of the socket 120 slightly longer than the pedestal 110, the grip portion 124 can be easily gripped when the socket 120 is pulled out of the pedestal 110. Furthermore, it can cope with shrinkage and expansion of wood due to seasonal changes.

  The pedestal 110 may be initially attached to the cello CH, or the pedestal 110, the socket 120, and the end pin EP may be integrated and then attached to the cello CH as a whole. With the above operation, the end pin EP is attached to the cello CH (FIG. 1).

  Next, an operation for removing the end pin EP from the cello CH will be described.

  From the state where the end pin EP is attached to the cello CH (FIG. 1), the socket 120 and the end pin EP are pulled out. At this time, it is easy to put a finger on the socket 120 because the grip portion 124 is provided. Further, the presence of the grip portion 124 makes it easy to pull out even if there is no force. In this way, the end pin EP can be removed from the cello CH.

  Note that the pedestal 110 may be removed only when necessary. The pedestal 110 is not attached or removed by the performer himself, but is basically performed by an expert. Further, the entire end pin EP, socket 120 and pedestal 110 may be pulled out at once. That is, the whole pedestal 110 may be pulled out first, and then the end pin EP may be pulled out from the pedestal 110 and the socket 120.

(Effect of this embodiment)
As described above, according to the present embodiment, the socket 120 is provided with the notch 120b for reducing the diameter, and the end pin EP is accommodated in the end pin accommodating portion 120a of the socket 120, and the base 110 is simply inserted into the through-hole 110a of 110, the diameter of the socket 120 is reduced by the action of the notch 120b, and the end pin EP can be crimped and fixed. For this reason, handling of the end pin fixture 100 is easy. And unlike the conventional screw type, since no weight is applied to the outside of the center of the cello CH, adverse effects on the cello CH can be avoided. Further, when the cello CH is used, a force is applied in the direction in which the end pin EP is crimped, and therefore the end pin EP can be sufficiently fixed.

  Further, since the inclined surface of the through hole 110a of the base 110 and the inclined surface of the outer periphery of the socket 120 are inclined at substantially the same angle with respect to the axial direction, the outer peripheral surface of the socket 120 is substantially uniform. Since the through hole 110a of the pedestal 110 is in close contact with the socket 110 and the end pin EP can be fixed to the entire pedestal 110, the end pin EP can be sufficiently fixed. Moreover, if it is the structure which has an inclined surface (taper surface), manufacture of components is easy.

  Further, by providing the grip portion 124 for assisting the operation of pulling out the socket 120 in the vicinity of the end portion of the socket 120, the socket 120 can be easily pulled out from the base 110.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to this example. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  For example, in the above embodiment, the specific dimensions and the like of the pedestal 110 and the socket 120 have been described, but the present invention is not limited to this. Materials and dimensions can be arbitrarily designed in consideration of strength, ease of use, speed of sound reaction, balance, and the like. The above-described dimensions are examples, and the portions whose dimensions are not described can be configured to arbitrary dimensions. Further, an additional configuration for the purpose of improving the functionality and the design may not necessarily be provided on the pedestal or the socket.

  Moreover, although the said embodiment demonstrated the example made into the structure which the inclined surface of the through-hole 110a of the base 110 and the inclined surface of the outer periphery of the socket 120 inclined substantially the same angle with respect to the axial direction, The invention is not limited to this. When the second member is inserted into the through hole of the first member in a state where the end pin is accommodated in the end pin accommodating portion, the diameter is reduced by the action of the notch so that the end pin accommodating portion presses and fixes the end pin. Any configuration can be adopted. Even when the inclined surface is formed on both the through hole of the base and the outer periphery of the socket, the inclination angle is not necessarily the same.

  Further, in the above embodiment, the grip portion 118 is provided on the pedestal 110 as an extraction assisting portion for assisting the operation of pulling out the pedestal 110. However, the present invention is not limited to this, and the grip portion 118 is not provided. Also good. Further, any other form may be used as long as it is configured to assist the operation of pulling out the socket. However, since the surface area with the socket part inside a base increases when the structure like the grip part 118 is provided, it is better to provide the grip part. Further, since the grip portion of the socket portion is separated from the musical instrument, it becomes easier for the performer to grip when changing the length of the end pin.

  Moreover, in the said embodiment, although the grip part 124 was provided in the socket 120 as an extraction assistance part for assisting the operation | movement which extracts the socket 120, this invention is not limited to this. The grip portion 124 may not be provided. Further, any other form may be used as long as it is configured to assist the operation of pulling out the socket.

  Moreover, in the said embodiment, although the base 110 and the socket 120 were demonstrated as a wooden thing, this invention is not limited to this, Arbitrary materials can be employ | adopted.

  The above embodiment, application examples, and modification examples can be implemented in any combination.

DESCRIPTION OF SYMBOLS 100 End pin fixing tool 110 Base 110a Through-hole 112 Insertion part 114 Contact part 116 Groove 118 Grip part 120 Socket 120a End pin accommodating part 120b Notch 122 Insertion part 124 Grip part CH Cello EP End pin

Claims (5)

An end pin fixing tool for fixing an end pin to a musical instrument,
A first member detachably attached to the musical instrument;
A second member detachably attached to the first member and holding the end pin;
Consists of
The first member penetrates in the axial direction and has a through hole into which the second member is inserted;
The second member is provided with an end pin accommodating portion for accommodating the end pin, and a notch for reducing the diameter in the axial direction,
The outer periphery of the through hole of the first member and the second member has an inclined surface with respect to the axial direction,
When the second member is inserted into the through hole of the first member in a state where the end pin is accommodated in the end pin accommodating portion, the end pin accommodating portion is reduced in diameter by the action of the notch. An end pin fixing tool, wherein the end pin is fixed by crimping.   The end pin fixing according to claim 1, wherein the inclined surface of the through hole of the first member and the inclined surface of the outer periphery of the second member are inclined at the same angle with respect to the axial direction. Ingredients.   3. The end pin fixture according to claim 1, wherein a first extraction assisting portion is provided in the vicinity of an end portion of the first member to assist an operation of extracting the first member. 4.   The end pin fixing tool according to any one of claims 1 to 3, wherein a second pulling assisting part for assisting an operation of pulling out the second member is provided in the vicinity of the end of the second member. . The end pin fixture according to any one of claims 1 to 4, wherein the first member and the second member are made of wood.