JP4644460B2 - Keyboard instrument stand - Google Patents

Description

  The present invention relates to a keyboard instrument stand that supports a musical instrument body.

  As a conventional stand of this kind of keyboard instrument, for example, the one disclosed in Patent Document 1 is known. As shown in FIG. 11, the stand 51 includes left and right stand bodies 52, 52 (only one is shown) and left and right mounting brackets 53, 53 (between the lower ends of both stand bodies 52, 52). It is composed of a pedal base 54 or the like attached via only one). The mounting bracket 53 is formed by bending a metal plate, for example, and is formed in an L shape from a stand main body fixing portion 53a and a pedal base fixing portion 53b extending perpendicularly from the stand main body fixing portion 53a. The mounting bracket 53 is screwed to the lower end portion of the inner surface of the stand main body 52 in the stand main body fixing portion 53a. In this state, the pedal base fixing portion 53b is horizontally inward from the stand main body 52. It protrudes. The pedal base fixing portion 53b is formed with front and rear screw holes 55, 55 penetrating in the vertical direction.

  On the other hand, the pedal base 54 includes an upper plate 54a that extends horizontally in the left-right direction and a front plate 54b that extends downward from the front end thereof. Holes 56, 56 are formed (only one end side is shown). In this pedal base 54, each end portion of the upper plate 54 a is placed on the pedal base fixing portion 53 b of the mounting bracket 53, and the screw 57 passed through the hole 56 of the pedal base 54 is screwed into the screw hole 55 of the mounting bracket 53. Thus, the stand body 52 is attached.

  However, in this stand 51, since the screw 57 is screwed in from the surface side of the pedal base 54, there is a problem that the head of the screw 57 is visible from the player side and the appearance is impaired.

  Conventionally, for example, a stand shown in FIG. In this stand 61, the mounting bracket 63 has an L-shaped cross section like the mounting bracket 53 described above, and has a stand main body fixing portion 63a and a pedal base fixing portion 63b. The mounting bracket 63 is screwed to the left and right ends of the back surface of the pedal base 64 by screws 65 screwed from the back side of the pedal base 64 in the pedal base fixing portion 63b. 63 a protrudes downward from the back surface of the pedal base 64. For this reason, the screw 65 cannot be seen from the surface of the pedal base 64.

  The pedal base 64 is attached to the stand body 62 by, for example, the following method. That is, as shown in FIG. 12, the stand 61 is placed on the floor surface F with its back side facing down, and the stand body fixing portion 63a of the mounting bracket 63 is held on the stand while supporting the pedal base 64 with hands. The screw 67 is screwed into the stand main body 62 through the hole 66 of the stand main body fixing portion 63a while keeping the pedal base 64 positioned with respect to the stand main body 62 in contact with the lower end portion of the main body 62.

  However, in the stand 61, when the pedal base 64 is attached to the stand main body 62, the stand main body fixing portion 63a is brought into contact with a predetermined position of the stand main body 62 while supporting the pedal base 64 by hand as described above. The screw must be screwed while maintaining its positioned state. For this reason, there exists a problem that the assembly operation of the stand 61 cannot be performed easily.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a keyboard instrument stand that can be assembled while being easily positioned while maintaining a good appearance.

JP-A-8-292768

To achieve this object, a stand for a keyboard instrument according to claim 1 includes left and right stand bodies extending in the vertical direction, and left and right protrusions for positioning projecting from predetermined positions on the inner surfaces of the left and right stand bodies, respectively. A horizontal pedal base mounted between the left and right stand bodies and left and right ends of the back of the pedal base are provided with holes at predetermined positions.When the pedal base is attached to the stand body, the holes become protrusions. A left and right fixture for positioning the pedal base with respect to the stand main body by engaging; and a fixing means for fixing the pedal base to the stand main body through the fixture in a state where the pedal base is positioned by the fixture. and fixing means is constituted by a screw, the hole of the fixture, the shank of the screw is notched engageable notch is formed of a tapered shape toward its rear side , The left and right stand body and the pedal base are provided at right angles to each other, the screw is attached to the stand body with its head floats, fixture, first fixing portion fixed to the pedal base And a second fixing portion that is fixed to the stand body with a screw, the first and second fixing portions are formed so as to form a slight acute angle with each other, and the notch is engaged with the shaft portion of the screw, After positioning the pedal base , the first fixing portion and the second fixing portion are attached in a state where the first fixing portion and the second fixing portion are spread out at right angles by tightening screws when fixing the second fixing portion to the stand body. And

According to this keyboard instrument stand, projections are provided at predetermined positions on the inner surfaces of the left and right stand bodies, and attachments having holes at predetermined positions are provided at the left and right ends of the back surface of the pedal base. Yes. The hole of the fixture is a notch that can be engaged with the shaft portion of the screw, and the notch is tapered toward the back side. According to such a structure, a pedal base is attached to a stand main body as follows, for example. First, the screw is attached to a predetermined position of the stand body with its head floating from the stand body. Next, after engaging the notch of the fixture with the shaft portion of the screw, the fixture is slid to bring the edge on the back side of the notch into contact with the shaft portion. Thereby, a pedal base is positioned with respect to a stand main body. Then, the pedal base is fixed to the stand body by tightening the screw in this positioning state. This notch is tapered toward the back side of the fixture, i.e., formed so as to narrow toward the back side of the notch, so that the notch can be easily engaged with the shaft portion of the screw, and Positioning and fixing with screws can be easily performed. As described above, the pedal base is fixed to the stand body in a state of being positioned by the protrusion and the hole of the fixture, and unlike the conventional case, when the both are fixed, the pedal base is supported while being supported by the hand. Can be easily attached to the stand body. In this case, for example, by forming the notch so that the edge of the notch is positioned above the opening during mounting, the notch is engaged with the shaft portion of the screw, and then the hand is released from the pedal base. With its own weight, the fixture slides together with the pedal base and slides down on the screw shaft, and the edge of the notch is positioned in contact with the screw shaft so that assembly work can be performed easily. It becomes possible. Further, as described above, this screw has a function as a positioning projection and a function as a fixing means. Accordingly, it is possible to reduce the number of parts and the number of assembling steps accordingly, thereby reducing the manufacturing cost.

In the present invention, since the fixture is provided on the back surface of the pedal base, the protrusion that engages with the fixture and the fixing means for fixing the pedal base to the stand body via the fixture are provided on the back surface of the pedal base. It becomes possible to arrange on the side. Thereby, these parts are hidden by the pedal base and cannot be seen from the player side, so that the appearance of the stand can be maintained well. Furthermore, the fixture is fixed to the stand in a state in which the first and second fixing portions are pushed from a slightly acute angle to a right angle by tightening screws when fixing the second fixing portion of the fixture to the stand body. It is installed between the main body and the pedal base. In this state, the reaction force of the second fixing portion of the fixture that has been spread out always acts on the screw screwed into the stand main body so as to press it inward. As a result, it is possible to prevent the screws from loosening. Therefore, even when the keyboard instrument is used for a long period of time, it is possible to prevent the rattling between the pedal base and the stand body due to the looseness of the screws. In addition, since the angle between the first and second fixing portions of the fixture is originally slightly acute, the tip of the second fixing portion is more than the end surface of the pedal base before the pedal base is fixed to the stand body. Is also located inward. Therefore, when the pedal base is attached, the tip of the second fixed portion is less likely to come into contact with the stand main body, thereby preventing the stand main body from being damaged.

Invention according to claim 2, in the stand of the keyboard musical instrument according to claim 1, cut-out, the further cut out from the back side of the distal end portion laterally engageable locking portion to the shaft portion of the screw It is characterized by having.

  According to this configuration, in order to attach the pedal base to the stand body, the edge of the notch on the back side of the notch is brought into contact with the shaft portion of the screw so that the tip of the notch is positioned in a state where the fixture is positioned. The locking portion engages with the shaft portion of the screw. By the engagement of the locking portion, the displacement after the positioning of the fixture with respect to the shaft portion of the screw is prevented, so that the pedal base can be positioned more accurately and stably with respect to the stand body.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a stand of an electronic piano (keyboard instrument) according to a first embodiment of the present invention. The stand 1 supports a piano body (both not shown) including a keyboard and the like, and is attached between the left and right stand bodies 2 and 2 extending in the vertical direction and the lower ends of both stand bodies 2 and 2. A horizontal pedal base 3 and a back plate 4 attached between the rear ends of both stand bodies 2 and 2 are provided. Each stand main body 2 is composed of a wife base 5 placed on the floor surface F and a side plate 6 erected on this. The metal plates 7 and 7 are attached to the upper ends of the side plates 6, and the piano main body placed on the stand main bodies 2 and 2 is fixed via the metal plates 7 and 7.

  The pedal base 3 is formed in an L-shaped cross section from an upper plate 3a extending in the left-right direction and a front plate 3b extending downward from the front end thereof. Three notches 3c are formed at the center of the lower end portion of the front plate 3b, and pedals (not shown) are inserted and attached to the notches 3c. The pedal base 3 is attached to the left and right stand main bodies 2 and 2 via attachment brackets 11 and 11 (attachment tools) at the left and right ends, respectively (only one is shown in FIG. 2).

  The mounting bracket 11 is formed by bending a metal plate, for example, an iron plate. As shown in FIGS. 2 and 3, the pedal base fixing part 11a (first fixing part) and one end of the pedal base fixing part 11a are provided. A stand main body fixing portion 11b (second fixing portion) extending substantially at a right angle is formed in an L-shaped cross section. As shown in FIG. 4, the angle between the pedal base fixing part 11a and the stand main body fixing part 11b is not a right angle but a slightly acute angle (for example, 89 degrees). Note that FIG. 4 is exaggerated than the actual one in order to show that this angle is an acute angle. Front and rear deformation holes 12, 12 (holes) are formed at predetermined positions of the stand main body fixing portion 11b, and a circular hole 13 is formed between the deformation holes 12, 12. Each deformation hole 12 has a circular insertion portion 12a through which the head of the screw 8 described later can be inserted, and continues forward from the insertion portion 12a, is smaller in width than the insertion portion 12a, and the shaft portion of the screw 8 is It is comprised by the groove part 12b which can be engaged.

  The pedal base 3 is attached to the stand body 2 as follows, for example. First, the pedal base fixing portion 11a of each mounting bracket 11 is fixed to the left and right ends of the back surface of the upper plate 3a of the pedal base 3 with screws 14 (only one is shown). In this state, the stand main body fixing portion 11b of the mounting bracket 11 has a base end that is flush with the side end surface of the upper plate 3a of the pedal base 3 and an acute angle with respect to the pedal base fixing portion 11a. The tip is located inward from the side end surface of the upper plate 3a.

  Next, as shown in FIG. 2, the stand main body 2 and the pedal base 3 are placed on the floor surface F with their back sides facing down. Next, the front and rear screws 8 and 8 (protrusions and fixing means) are attached to a predetermined position at the lower end of the inner surface of each side plate 6 with their heads floating. Next, the pedal base 3 is moved to the stand body 2 side, and each insertion portion 12a of the mounting bracket 11 is inserted through the head of the screw 8, and then the hand is released from the pedal base 3. Thus, as the pedal base 3 is lowered by its own weight, the mounting bracket 11 is lowered while sliding on the shaft portion of the screw 8, and the edge portion of the groove portion 12 b comes into contact with the shaft portion of the screw 8. Thereby, the pedal base 3 is positioned with respect to the stand main body 2. In this state, the pedal base 3 is fixed to the stand body 2 via the mounting bracket 11 by tightening the screws 8. Further, the screw 15 is screwed into the stand main body 2 through the hole 13 of the stand main body fixing portion 11b and tightened. As described above, the pedal base 3 is fixed to the stand main body 2 via the mounting bracket 11, and the assembly work of the stand 1 is completed. As described above, since the angle between the pedal base fixing portion 11a and the stand main body fixing portion 11b of the mounting bracket 11 is set to be slightly acute, both the fixing portions 11a and 11b are acutely angled with each other by tightening the screw 8. It is pushed from right angle at right angles. As a result, the spread reaction force of the stand main body fixing portion 11b always acts on the screw 8 and the screw 15 so as to press them inward.

  As described above, according to the stand 1 according to the first embodiment, the mounting bracket 11 is provided on the back side of the pedal base 3 and the screw 8 is disposed on the back side of the pedal base 3. The screw 8 and the screw 14 are hidden by the pedal base 3 and cannot be seen from the player side. Therefore, the appearance of the stand 1 can be maintained well. Further, when attaching the pedal base 3, the edge of the groove 12 b abuts against the shaft part of the screw 8 simply by releasing the hand from the pedal base 3 after passing the insertion part 12 a of the mounting bracket 11 through the head of the screw 8. In a positioning state. Further, since the pedal base 3 is fixed to the stand main body 2 in such a positioned state, unlike the conventional case, when the both are fixed, the work of positioning while supporting the pedal base 3 by hand becomes unnecessary. The pedal base 3 can be easily attached to the stand main body 2, and the assembling work can be facilitated. Further, the screw 8 has both a function as a positioning protrusion of the pedal base 3 and a function as a fixing means of the pedal base 3. Therefore, it is possible to reduce the number of parts and the number of assembling steps accordingly, thereby reducing the manufacturing cost.

  In addition, by tightening the screw 8 when fixing the pedal base 3, the pedal base fixing part 11a and the stand main body fixing part 11b of the mounting bracket 11 are pushed and spread at right angles from a slightly acute angle to each other. Since the reaction force of the stand main body fixing portion 11b always acts on the screw 8 and the screw 15 so as to press the screw 8 and the screw 15 inwardly, the looseness of the screw 8 and the screw 15 can be prevented. Therefore, even when the electronic piano is used for a long period of time, rattling between the pedal base 3 and the stand body 2 due to looseness of the screws 8 and 15 can be prevented. Further, since the shaft portion of the screw 15 is exactly engaged with the circular hole 13, the stand main body 2 and the mounting bracket 11, and thus the pedal base 3, the groove portion 12 b of the deformation hole 12 with which the shaft portion of the screw 8 is engaged. Therefore, it is possible to prevent the relative movement of the stand body 2 and the pedal base 3 from rattling. In addition, in the state where the mounting bracket 11 is attached to the pedal base 3, the tip of the stand main body fixing portion 11b of the mounting bracket 11 is positioned inward from the side end surface of the upper plate 3a of the pedal base 3. When the pedal base 3 is attached to the stand main body 2, it becomes difficult for the tip of the stand main body fixing portion 11 b to come into contact with the stand main body 2, thereby preventing the stand main body 2 from being damaged.

  FIG. 5 shows an electronic piano stand according to a second embodiment of the present invention. This stand 20 differs from the first embodiment only in the configuration of the mounting bracket. In the following embodiments, differences will be mainly described, and the same components are denoted by the same reference numerals, and detailed description thereof will be omitted. As shown in FIGS. 5 and 6, front and rear cutouts 22 and 22 are formed in the stand main body fixing portion 21 b of the mounting bracket 21. As shown in FIG. 5, each notch 22 is formed in a tapered shape that extends obliquely toward the upper front side and becomes narrower toward the far side.

  The pedal base 3 is attached to the stand body 2 as follows, for example. First, in the same manner as in the first embodiment, the mounting brackets 21 and 21 are attached to the pedal base 3, and the screws 8 and 8 are attached to the stand main bodies 2, respectively. Next, after engaging each notch 22 of the mounting bracket 21 with the shaft portion of the screw 8, the hand is released from the pedal base 3. Accordingly, as the pedal base 3 is lowered by its own weight, the mounting bracket 21 is lowered while sliding on the shaft portion of the screw 8, and the edge portion of the notch 22 comes into contact with the shaft portion of the screw 8. Thereby, the pedal base 3 is positioned with respect to the stand main body 2. Hereinafter, as in the first embodiment, the pedal base 3 is fixed to the stand body 2 via the mounting bracket 21 by tightening the screws 8 and 15.

  As is apparent from the above, also in the second embodiment, the effects of the first embodiment described above can be obtained similarly. In addition, since the notch 22 of the stand main body fixing portion 21b is tapered toward the upper front side, the notch 22 can be easily engaged with the shaft portion of the screw 8 and the positioning of the pedal base 3 can be easily performed. Can be done. Therefore, the assembling work of the stand can be performed more easily.

  FIG. 7 shows an electronic piano stand according to a third embodiment of the present invention. The stand 30 differs from the second embodiment only in the shape of the notch formed in the stand main body fixing portion of the mounting bracket. As shown in FIGS. 7 and 8, front and rear cutouts 32, 32 are formed in the stand main body fixing portion 31 b of the mounting bracket 31. Each notch 32 is formed in a tapered shape toward the back side, and has a locking portion 32a at the tip end on the back side. Specifically, the front edge of the notch 32 extends substantially vertically, the rear edge extends slightly obliquely upward and forward, and further cuts forward from the front end of the front edge. The portion thus formed is a locking portion 32a. The locking portion 32 a is formed in a semicircular shape having a diameter substantially equal to the diameter of the shaft portion of the screw 8, and thus can be engaged with the shaft portion of the screw 8.

  According to this configuration, when the pedal base 3 is attached to the stand body 2, the mounting bracket 31 is positioned by contacting the edge portion of the notch 32 with the shaft portion of the screw 8 as in the second embodiment. . In this state, the locking portion 32 a is engaged with the shaft portion of the screw 8 so as to prevent the mounting bracket 31 from being displaced with respect to the shaft portion of the screw 8, so that the pedal base 3 is attached to the stand body 2. On the other hand, positioning can be performed with higher accuracy.

  FIG. 9 shows an electronic piano stand according to a fourth embodiment of the present invention. In this stand 40, two positioning projections 42, 42 are provided at predetermined positions on the lower end portion of the inner surface of each side plate 6. The base end portion of each protrusion 42 has a constant diameter, and the tip end portion is formed in a taper shape. As shown in FIGS. 9 and 10, fitting holes 44 and 44 (holes) are formed at positions corresponding to the protrusions 42 and 42 in the stand main body fixing portion 41 b of the mounting bracket 41, and outside of them, Screw fixing holes 45 and 45 (second holes) are formed. Both the fitting hole 44 and the hole 45 are round holes.

  The pedal base 3 is attached to the stand body 2 as follows, for example, after attaching the mounting bracket 41 via the pedal base fixing part 41a. First, the pedal base 3 is positioned with respect to the stand body 2 by engaging each fitting hole 44 of the mounting bracket 41 with the protrusion 42 of the stand body 2. Next, in this positioning state, the screw 46 (fixing means) is passed through the hole 45 of the mounting bracket 41, screwed into the side plate 6 of the stand body 2, and tightened. As described above, the pedal base 3 is fixed to the stand body 2.

  As described above, according to the fourth embodiment, since the positioning protrusion 42 and the fixing screw 46 of the pedal base 3 are configured separately from each other, the screw 8 is used for positioning and fixing the pedal base 3. Compared with the first to third embodiments that are also used for the positioning, the positioning accuracy and stability can be improved. In addition, since the tip end portion of the protrusion 42 is tapered, the fitting hole 44 can be easily engaged with the protrusion 42.

  In addition, this invention can be implemented in various aspects, without being limited to the described embodiment. For example, in this embodiment, a screw is used as the fixing means. However, any means may be used as long as the pedal base 3 can be fixed to the stand body 2 via a fixture. For example, an adhesive may be used. Moreover, although the screw 8, the screw 46, and the protrusion 42 are provided on the side plate 6, the screw 8, the screw 46, and the protrusion 42 may be provided on the end base 5 of the stand body 2. In addition, it is possible to appropriately change the detailed configuration within the scope of the gist of the present invention.

It is a perspective view which shows the stand of the electronic piano of this invention. It is a fragmentary perspective view which shows the stand by 1st Embodiment of this invention. It is a top view of the attachment metal fitting of FIG. It is a front view of the attachment metal fitting of FIG. It is a fragmentary perspective view which shows the stand by 2nd Embodiment. It is a top view of the attachment metal fitting of FIG. It is a fragmentary perspective view which shows the stand by 3rd Embodiment. It is a top view of the attachment metal fitting of FIG. It is a fragmentary perspective view which shows the stand by 4th Embodiment. It is a top view of the attachment metal fitting of FIG. It is a fragmentary perspective view which shows the stand of the conventional keyboard instrument. It is a fragmentary perspective view which shows the other conventional stand different from the stand of FIG.

Explanation of symbols

1 stand 2 stand body 3 pedal base 8 screw (protrusion and fixing means)
11 Mounting bracket (Mounting fixture)
11a Pedal base fixing part (first fixing part)
11b Stand body fixing part (second fixing part)
12 Deformation hole (hole)
12a Insertion part 12b Groove part 20 Stand 21 Mounting bracket (mounting tool)
21a Pedal base fixing part (first fixing part)
21b Stand body fixing part (second fixing part)
22 Notch 30 Stand 31 Mounting bracket (Mounting tool)
31a Pedal base fixing part (first fixing part)
31b Stand body fixing part (second fixing part)
32 Notch 32a Locking part 40 Stand 41 Mounting bracket (mounting tool)
41a Pedal base fixing part (first fixing part)
41b Stand body fixing part (second fixing part)
42 Protrusion 44 Fitting hole (hole)
45 holes (second hole)
46 Screw (fixing means)

Claims (2)

Left and right stand bodies extending vertically,
Left and right protrusions for positioning projecting from predetermined positions on the inner surfaces of the left and right stand bodies,
A horizontal pedal base attached between the left and right stand bodies;
The pedal base is provided at both right and left ends of the back surface of the pedal base, and has holes at predetermined positions. When the pedal base is attached to the stand main body, the hole engages with the protrusion, thereby the pedal base is Left and right fixtures for positioning relative to the stand body;
A fixing means for fixing the pedal base to the stand main body via the fixture in a state where the fixture is positioned;
The protrusion and the fixing means are constituted by screws,
The hole of the fixture is a notch with which the shaft portion of the screw can be engaged,
The notch is formed in a tapered shape toward the back side,
The left and right stand bodies and the pedal base are provided at right angles to each other,
The screw is attached to the stand body with its head floating,
The fixture is
The first fixed portion fixed to the pedal base and the second fixed portion fixed to the stand body with the screw are formed, and the first and second fixed portions are formed so as to form a slight acute angle with each other. And
After the notch is engaged with the shaft portion of the screw and the pedal base is positioned , the first and second fixing portions are tightened by fastening the screw when fixing the second fixing portion to the stand body. A stand for a keyboard instrument, characterized in that they are mounted in a state where they are spread at right angles to each other. 2. The keyboard instrument stand according to claim 1, wherein the notch further has a notch that is further notched laterally from a distal end portion on the back side and that can be engaged with a shaft portion of the screw. .

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