JP4742932B2 - Stand structure - Google Patents

Description

  The present invention relates to a stand structure for holding a thin main part in an upright state.

  2. Description of the Related Art Conventionally, there is known a stand structure for holding a main part in an upright state in a thin display, a speech stand, a musical instrument support or the like having a thin main part.

For example, in the percussion instrument devices of Patent Documents 1 and 2 below, a frame that supports a large number of pads is held upright during performance. In these percussion instrument devices, the left and right main frames are connected by a connecting member that is long in the left-right direction, and extending members that extend to the player side are provided at the lower ends of both main frames. Further, by connecting the tip of each extending member and the lower half of the main frame with a thin rod-like member, a triangular frame body is formed in the lower half of the main frame. The frame does not fall down.
LM Sales Department Planning Promotion Office GD charge, catalog “Drums ABSOLUTELY HANDCRAFTED”, Yamaha Corporation, October 2005, p37, p38 “YAMAHA Drum web magazine”, [online], Silent Session Drum DTXPRESS III, [Search February 6, 2006], Internet <URL: http://www.yamaha.co.jp/product/drum/column/col03103101 /index.html>

  However, in the percussion instrument devices described in Non-Patent Documents 1 and 2, since an extended member or a thin rod-shaped member must be attached when standing up for performance and removed during storage, The work is complicated.

  Further, in a thin display, a speech stand, etc., there is generally a problem that a stand mechanism is fixedly attached and is bulky when stored.

  The present invention has been made in order to solve the above-described problems of the prior art, and a first object of the present invention is to make it possible to hold a thin main part upright by a simple operation and not to be bulky during storage. It is to provide a stand structure that can be used.

  The second object of the present invention is that the rotating member can be held at a predetermined angle by a simple operation, and can be prevented from being bulky during storage.

  In order to achieve the first object, a stand structure according to claim 1 of the present invention is a stand structure for holding a thin main portion (10, 80) in an upright state, and one end of the stand portion is the main portion. Auxiliary members (70, 85) that are pivotally connected to each other and whose other end is rotatable about the one end, and an intermediate portion between the one end and the other end is rotated to the other end of the auxiliary member. A leg member (60, 84) that is movably connected, an engaging part (63) provided at the one end of the leg member, and a main part that corresponds to the engaging part of the leg member. Engaging the corresponding engaging portion (66a), and engaging the engaging portion of the leg member with the engaging corresponding portion of the main portion, and changing the posture of the leg member to the other of the leg member. While the main part is in the standing state by adopting a posture in which the end receives a force from the floor surface, the engaging part and the engaging corresponding part By releasing the engagement, bringing the leg member close to the main part, and bringing the leg member closer to the main part in a parallel state than when the main part is in an upright state, The leg member and the auxiliary member are configured to be in a folded state.

  Preferably, at least one pair of the leg member, the auxiliary member, the engagement portion, and the engagement corresponding portion is provided symmetrically across the main portion on both sides of the main portion (Claim 2).

  Preferably, the fitting portion (73) provided fixedly with respect to the main portion and the auxiliary member are provided to be fitted into the fitting portion when the main portion is in the standing state. And a fitting-corresponding portion (71) at the time of standing (claim 3).

  Preferably, the fitting portion (73) provided fixedly with respect to the main portion, and the fitting portion provided on the leg member when the leg member and the auxiliary member are in the folded state. And a fitting fitting portion (62) for folding.

  Preferably, the engagement portion of the leg member includes a first contact portion (63a) that receives a downward force from the engagement corresponding portion when the main portion is in the standing state, and the main portion. And a second contact portion (64) for receiving a force from the engagement corresponding portion to the side where the leg member is located when the portion is in the standing state (Claim 5). .

  In order to achieve the second object, a stand structure according to claim 6 of the present invention is a stand structure for holding a rotating member (83) at a predetermined angle on a support (80), one end of which is An auxiliary member (88) rotatably connected to the support and having the other end rotatable about the one end, and an intermediate portion between the one end and the other end turn around the other end of the auxiliary member. A movable arm member (87), an engagement portion provided at the one end of the arm member, and an engagement correspondence provided in the support body corresponding to the engagement portion of the arm member And engaging the engagement portion of the arm member with the engagement corresponding portion of the support, and supporting the rotating member on the other end of the arm member. While the rotating member is held at the predetermined angle with respect to the body, the engagement portion and the engagement corresponding portion are disengaged. The arm member is brought close to the support body, and the arm member is brought closer to a parallel state with respect to the support body than when the arm member is held at the predetermined angle. The auxiliary member is configured to be in a folded state.

  In addition, the code | symbol in the said parenthesis is an illustration.

  According to the first aspect of the present invention, the thin main portion can be erected and held with a simple operation, and can be prevented from being bulky during storage.

  According to the second aspect of the present invention, at least the lower portion of the main portion where the leg member is provided can be floated when standing.

  According to the third aspect, the standing state of the main portion can be stably maintained.

  According to the fourth aspect, the folded state of the leg member and the auxiliary member can be stably maintained.

  According to the fifth aspect, the upright holding of the main part is realized with a simple configuration.

  According to the sixth aspect of the present invention, the rotating member can be held at a predetermined angle by a simple operation, and can be prevented from being bulky during storage.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
1 and 2 are perspective views of a percussion instrument device to which a stand structure according to the first embodiment of the present invention is applied. This percussion instrument device is configured as an electronic drum. Hereinafter, the side on which the player of the percussion instrument apparatus sits is referred to as “player side” to “front side”, and the side on which the opposite audience is present is referred to as “customer side” to “back side”. In addition, the front / rear and left / right directions of the percussion instrument apparatus are referred to based on the player. FIG. 1 is a view from the oblique player side, and FIG. 2 is a view from the oblique customer side.

  The percussion instrument apparatus includes a main board 10 and a plurality of drum boards 20 (20A to 20G) for hitting. As will be described in detail later, each drum board 20 can be unfolded / folded with respect to the main board 10 and can be arranged in a “deployed state” suitable for performance and a “folded state” suitable for storage. In FIG. 1 and FIG. 2, the unfolded state is shown.

  FIG. 3 is a front view of the percussion instrument device in a deployed state (viewed from the player side). FIG. 4 is a left side view of the percussion instrument device in a developed state. FIG. 5 is a plan view of the percussion instrument device in a developed state. FIG. 6 is a front view of the percussion instrument device in a folded state. FIG. 7 is a left side view of the percussion instrument device in a folded state. FIG. 8 is a plan view of the percussion instrument device in a folded state.

  The main board 10 is formed in a plate shape by a wood material or the like, and the outer edge 11 is formed in a horizontally long rectangle in front view (see FIGS. 3 and 6). Legs 60A and 60B are provided on the lower half of the left and right ends of the player side surface 10a of the main board 10, and legs 60C and 60D are provided on the left and right ends of the customer side surface 10b. In the standing state of the main board 10, these four leg portions 60 are erected vertically with the lower portion of the main board 10 floating from the floor surface (standing state) (FIGS. 1 to 5). reference).

  The drum board 20 is hit by a drum stick (not shown). As shown in FIG. 1, the drum boards 20 </ b> A and 20 </ b> B are provided apart from each other on the player side of the main board 10. The drum boards 20C and 20D and the drum boards 20E and 20F are provided to be separated from each other on the customer side of the main board 10, and the drum board 20G is provided in the vicinity of the drum board 20A. It is located above and to the left of the drum board 20A. In addition, on the player side at the top of the main board 10, an operation panel unit 19 is disposed in the center in the left-right direction. At the lower part of the main board 10, a foot pedal mounting part 14 projects from the player side.

  FIG. 9 is a cross-sectional view taken along line AA in FIG. As shown in FIGS. 2 and 9, a case portion 15 is provided in the center of the main board 10 on the customer side. The case part 15 protrudes from the customer side surface 10b of the main board 10 to the customer side, and has a space inside. The case portion 15 is formed in a circular shape having a bass drum shape in a general acoustic drum set when viewed from the customer side, and has a diameter similar to that of the shell of the bass drum (see FIG. 2). Thereby, the case part 15 recalls the bass drum in an acoustic drum set from the customer side.

  1, 3, 6, and 9, the player side surface 10 a of the main board 10 is provided with a circular frame portion 13 having the same diameter as the outer diameter of the case portion 15. The frame portion 13 has a bass drum shell shape in front view so as to recall the bass drum in the acoustic drum set from the player side. The frame portion 13 is not limited to a circle and may be a polygon. A bass drum board 12 is fixedly disposed at the center of the frame 13 on the player side surface 10 a of the main board 10. A foot pedal (not shown) is attached to the foot pedal mounting portion 14. The bass drum board 12 is struck by a beater (not shown) that is movable by pressing the foot pedal.

  As shown in FIGS. 3 and 9, a circuit board (hereinafter simply referred to as “board”) 18 and two left and right speakers 17 (17 </ b> L and 17 </ b> R) are accommodated in the case portion 15. As shown in FIG. 9, a back plate 27 is provided inside the customer side surface of the case portion 15, and the substrate 18 is attached to the back plate 27 via a plurality of attachment portions 26. Moreover, the speaker 17 is attached to the main board 10, and the sound emission part faces the player side and emits sound to the player side. As shown in FIG. 3, the two speakers 17 are arranged in the frame 13 and at a position away from the bass drum board 12 in the front view. As a result, the speaker 17 is protected from being hit by the bass drum board 12. The speaker 17 may be disposed at any other position as long as it is located within the frame 13 and avoids the bass drum board 12.

  As shown in FIG. 2, a terminal group 16 is provided in the lower left portion of the customer side surface of the case portion 15. The terminal group 16 is disposed in a marking portion 32 drawn on the case portion 15. The terminal group 16 includes, for example, a USB terminal, a headphone terminal, a hi-hat terminal for foot operation, a power supply terminal, and the like from the left side. The terminal group 16 may be arranged at a position overlapping the substrate 18 in a front view.

  The bass drum board 12 is disposed at a position corresponding to the central portion (mainly hitting portion) of the bass drum in the acoustic drum set. On the other hand, in the unfolded state, the drum boards 20A, 20B, 20C, 20D, 20E, 20F, and 20G are respectively a snare drum, a floor tom, a tom tom (small), a tom tom (large), and a crash cymbal ( Side cymbal), ride cymbal (top cymbal), and hi-hat cymbal.

  In the percussion instrument apparatus, the first rotation mechanism 21 and the second rotation mechanism are used as types of rotation mechanisms for allowing the drum board 20 and the operation panel 19 to be unfolded / foldable with respect to the main board 10. There are two types of section 22. As shown in FIG. 1, the first rotation mechanism portions 21A and 21B are attached in the vicinity of the upper left and right end portions of the player side surface 10a of the main board 10, and the first rotation mechanism portion 21H is the upper left and right ends of the player side surface 10a. Mounted in the center of the direction. As shown in FIG. 2, the second rotation mechanism portions 22 </ b> E and 22 </ b> F are attached to the upper left and right end portions of the customer side surface 10 b of the main board 10. In addition, the first rotation mechanism portions 21C and 21D are attached to positions on the outer side in the left-right direction of the second rotation mechanism portions 22E and 22F in the upper part of the customer side surface 10b. The first rotation mechanism portions 21G1 and 21G2 (see FIG. 8) are not attached to the main board 10 and will be described in detail later with reference to FIG.

  First, the drum boards 20A, 20B, 20C, and 20D are arranged in the vertical direction (surfaces orthogonal to the horizontal direction) to the first rotation mechanism portions 21A, 21B, 21C, and 21D via the arms 25A, 25B, 25C, and 25D, respectively. (See FIGS. 2, 5, and 6). As a result, the drum boards 20A and 20B rotate at least 90 ° from the angle at which the arms 25A and 25B are at least perpendicular to the main board 10 (see FIG. 4) to the parallel approach angle (see FIG. 7). It is freely rotatable in the range. On the other hand, the drum boards 20C and 20D are rotated by approximately 180 ° from the angle at which the arms 25C and 25D extend upward in the vertical direction with respect to the main board 10 (see FIG. 4). It is freely rotatable in the range.

  The operation panel unit 19 is connected to the first rotation mechanism unit 21H so as to be rotatable in the vertical direction (along a plane orthogonal to the horizontal direction) (see FIGS. 1 and 4), and has a rotation range of about 90 °. And is parallel to the main board 10 in the folded state (see FIG. 7).

  Further, the drum boards 20E and 20F are respectively connected to the second rotating mechanism portions 22E and 22F via the arms 25E and 25F, respectively, in the surface direction of the main board 10 (surface expansion direction and parallel to the customer side surface 10b). (Direction along the direction) (see FIG. 2). As a result, the drum boards 20E and 20F have a rotation range of approximately 180 ° from the angle at which the arms 25E and 25F extend vertically upward from the main board 10 (see FIG. 4) to the parallel approach angle (see FIG. 7). It can be rotated freely. However, the drum boards 20E and 20F rotate through the left and right tracks of the main board 10, respectively.

  Each of the second rotation mechanism sections 22 has a built-in speaker 50 (described later in FIG. 12), and the sound emitting section 50 a of the speaker 50 is provided at the upper left and right end portions of the player side surface 10 a of the main board 10. In the position corresponding to the 2 rotation mechanism part 22, it faces the player side in order to emit a sound to the player side (refer FIG.1, FIG.3, FIG.6).

  Hereinafter, when the drum board 20, the first rotation mechanism unit 21, the second rotation mechanism unit 22, and the arm 25 are not distinguished from each other, they are described without adding A, B, or the like. The same applies to the leg portion 60. Each detailed structure of the 1st rotation mechanism part 21 and the 2nd rotation mechanism part 22, and the relationship between these and the arm 25 are later mentioned in FIG. 11, FIG.

  Although not shown, the substrate 18 is configured with circuits for generating musical sounds such as a tone generator circuit, an amplifier circuit, and an effect circuit. Further, each of the drum board 20 and the bass drum board 12 is provided with a not-shown hitting sensor for detecting hitting. The detection signal of each impact sensor is sent to the substrate 18 and converted into a musical sound signal. The musical sound signal is emitted as sound from the speakers 17 and 50. The operation panel unit 19 is composed of an LCD or the like, and is used by the user to make various settings such as tone color, volume, and mode. The drum board 20, the bass drum board 12, the operation panel unit 19, and the substrate 18 are wired mainly through the arm 25 and the main board 10.

  The timbre of the musical sound generated by striking each drum board 20 and the bass drum board 12 is not necessarily the same as that of a general drum device, and can be arbitrarily set by operating the operation panel unit 19. In addition, the assignment of the sound generation to the speakers can be arbitrarily set.

  In the assignment in the present embodiment, as an example, the bass drum board 12 is assigned to the left and right speakers 17 and is positioned in the middle between the speakers 17. The drum board 20A is assigned to the speaker 17L and the speaker 50 in the second rotation mechanism 22E, and the drum board 20B is assigned to the speaker 17R and the speaker 50 in the right second rotation mechanism 22F. Yes. The drum boards 20C and 20D are assigned to the speakers 17L and 17R. The drum boards 20E and 20F are assigned to the speaker 50 in the second rotation mechanism unit 22E and the speaker 50 in the second rotation mechanism unit 22F, respectively. The drum board 20G is assigned to the speaker 50 in the second rotation mechanism unit 22E.

  FIG. 10 is a partial bottom view of the drum boards 20A and 20G as viewed from below. As described above, the first rotation mechanism portion 21A is attached in the vicinity of the upper left end portion of the player side surface 10a of the main board 10, and is located immediately on the right side of the sound emitting portion 50a of the speaker 50 (FIG. 1, FIG. 3). As shown in FIG. 10, the base end portion 25Aa of the arm 25A is connected to the first rotation mechanism portion 21A, and the drum board 20A is fixed to the free end portion 25Ab of the arm 25A at a fixed angle. Similarly, the drum board 20B is attached at a fixed angle to the free end of the arm 25B (see FIG. 5).

  As shown in FIG. 10, on the left side of the arm 25A, a plate-like connection arm 25G1 having a substantially triangular shape in a bottom view is integrally formed. That is, the base end portion 25G1a of the connecting arm 25G1 is connected to the left side portion of the arm 25A, and the first turning mechanism portion 21G1 is attached to the free end portion 25G1b of the connecting arm 25G1. The base end portion of the arm 25G2 is connected to the first rotation mechanism portion 21G1, and the first rotation mechanism portion 21G2 is connected to the free portion of the arm 25G2. The drum board 20G is attached to the first rotation mechanism portion 21G2.

  With such a configuration, the arm 25G2 is rotatable about the first rotation mechanism portion 21G1 in a direction along a plane perpendicular to the longitudinal direction of the arm 25A. The drum board 20G is rotatable in a direction along a plane perpendicular to the longitudinal direction of the arm 25A with the first rotation mechanism portion 21G2 as the center. Therefore, the arrangement of the drum board 20G is stacked on the drum board 20A via the first rotation mechanism portions 21G1 and 21G2 so as to be spaced apart from the drum board 20A in the upper right direction (FIGS. 3 and 4). It can be changed to the position (see FIG. 7, FIG. 8, etc.).

  As shown in FIGS. 2, 4, and 7, rotating necks 23C and 23D are interposed between the free ends of the arms 25C and 25D and the drum boards 20C and 20D, respectively. Rotating necks 24E and 24F are interposed between the free ends 25Eb and 25Fb of the arms 25E and 25F and the drum boards 20E and 20F, respectively.

  As shown in FIGS. 4 and 7, the stay 30 of the rotating neck portion 23C is fixed to the drum board 20C and is rotatable along a plane orthogonal to the left-right direction with respect to the free end portion of the arm 25C. It is connected to. The stay 30 is formed in a plate shape. The stay 30 is formed with an arcuate groove 30a. A pin 31 is fixedly provided at the free end of the arm 25C and is engaged in the arc-shaped groove 30a. The rotation range of the drum board 20C relative to the arm 25C is restricted by the range in which the arc-shaped groove 30a can be engaged with the pin 31.

  As shown in FIGS. 4 and 7, the stay 28 of the rotating neck 24E is fixed to the drum board 20E, and rotates along a plane orthogonal to the left-right direction with respect to the free end 25Eb of the arm 25E. It is connected freely. The stay 28 is formed with an arcuate groove 28a similar to the arcuate groove 30a of the stay 30, and a pin 29 fixedly provided at the free end 25Eb of the arm 25E is engaged with the arcuate groove 28a. Yes.

  Thus, the angle of the drum boards 20C and 20E can be adjusted in the unfolded state, and the drum boards 20C and 20E can be brought close to each other in parallel with the main board 10 in the folded state. The configuration of the rotating neck portions 23D and 24F is the same as that of the rotating neck portions 23C and 24E, respectively. Therefore, the arrangement of the drum boards 20D and 20F can be changed similarly to the drum boards 20C and 20E.

  The rotating necks 23C, 23D, 24E, and 24F are configured to generate appropriate friction with respect to the rotation, and the angles of the drum boards 20C, 20D, 20E, and 20F can be maintained at desired positions. ing. Thereby, compared with the structure which fixes the angle of drum board 20C, 20D, 20E, 20F with respect to rotation neck part 23C, 23D, 24E, 24F with a screw etc., operation of expansion | deployment / folding is easy.

  Next, the detailed structure of the 1st rotation mechanism part 21 and the 2nd rotation mechanism part 22 is demonstrated. The first rotation mechanism portions 21A to 21H have the same configuration. Moreover, although the 2nd rotation mechanism parts 22E and 22F are left-right symmetric, the structure is the same. Therefore, representatively, the configuration of the first rotation mechanism portion 21B and the second rotation mechanism portion 22E will be described.

  Fig.11 (a) is a perspective view of the 1st rotation mechanism part 21B, The same figure (b) is sectional drawing of the 1st rotation mechanism part 21B which follows the BB line of FIG.

  As shown in FIG. 11A, the first rotation mechanism portion 21 </ b> B has a pair of stays 41 and 42, and these stays 41 and 42 are fixed to the main board 10 with screws. A cylindrical body 40 is fixed to the base end portion of the arm 25B. The cylinder 40 may be formed integrally with the arm 25B. As shown in FIG. 5B, a part of the push button body 43 is interposed inside the cylinder body 40, and the push-down portion 43 b of the push button body 43 protrudes from the through hole 42 b of the stay 42. .

  The push button body 43 has a circular outer peripheral surface 43 d supported by a stay 42. The outer peripheral surface between the outer peripheral surface 43d and the pressing portion 43b is a tapered surface 43c that increases in diameter toward the outer peripheral surface 43d. The stay 42 is formed with a tapered surface 42a which is an inner surface corresponding to the tapered surface 43c.

  In addition, two cutout surfaces 43a are formed on the outer side of the outer peripheral surface 43d and closer to the stay 41 than the outer peripheral surface 43d. A parallel contact surface 40a corresponding to the notch surface 43a is formed on the inner side of the cylindrical body 40. Since the contact surface 40a is in contact with and engaged with the cutout surface 43a, the cylindrical body 40 and the push button body 43 can rotate integrally.

  A half portion of the push button body 43 near the stay 41 is a recess that opens toward the stay 41, and a spring 44 is provided inside the recess and inside the cylinder body 40. The spring 44 urges the contact surface 43e, which is the bottom of the concave portion, toward the stay 42, and the taper surface 43c is always in contact with the taper surface 42a when no operation is performed.

  In such a configuration, in order to rotate the arm 25 </ b> B, the user pushes the pressing portion 43 b of the push button body 43. Then, since the taper surface 43c is separated from the taper surface 42a, the user can freely rotate the arm 25B together with the cylindrical body 40 and the push button body 43 while pressing the pressing portion 43b. When the pressing of the pressing portion 43b is released after rotating to an appropriate position, the tapered surface 43c comes into contact with the tapered surface 42a again, and the arm 25B is fixed at the rotating position, and with a little force. The rotation position does not change.

  FIG. 12 is a cross-sectional view of the second rotating mechanism 22E along CC in FIG. A speaker mounting hole 10c is formed in the main board 10, and the speaker 50 is disposed in the speaker mounting hole 10c. A speaker front cover 51 is covered from the player side of the speaker mounting hole 10c, and a speaker back cover 52 is covered from the customer side of the speaker mounting hole 10c. From the customer side, the speaker front cover 51 and the speaker back cover 52 are fixed to the main board 10 together with a plurality of screws 33, whereby the speaker 50 is held between the covers.

  A fixed interposition member 53 is fitted to the customer side of the speaker back cover 52. The flange portion of the fixed interposing member 53 is fixed to the main board 10 by screwing or the like via the flange portion of the speaker back cover 52. A rotating member 55 is engaged with the fixed interposition member 53. That is, the outer peripheral surface of the cylindrical head portion 55b on the customer side of the rotating member 55 is slidably fitted to the inner peripheral surface 53b on the customer side of the fixed interposed member 53.

  A plurality of (for example, eight) fitting holes 53 a are formed in the fixed interposing member 53 at equal intervals in the circumferential direction of the rotating member 55. On the other hand, a projecting engagement portion 55a that can be fitted in the fitting hole 53a is formed on the flange portion of the rotating member 55 so as to project integrally on the customer side. The protruding engagement portions 55a are provided in the same number as the fitting holes 53a at positions corresponding to the fitting holes 53a, but the number may be smaller than that of the fitting holes 53a.

  The columnar head portion 55b of the rotating member 55 has a recess that opens to the player side, and a spring 54 is housed in the recess. The spring 54 is always in contact with the customer side surface of the speaker back cover 52 and constantly urges the rotating member 55 toward the customer side. Further, the back cover 56 is put on the fixed interposed member 53 from the customer side, and the flange portion of the back cover 56 is fixed to the flange portion of the fixed interposed member 53 by screwing or the like. A base end portion 25Ea of the arm 25E is fixed to the columnar head portion 55b of the rotating member 55 with a plurality of screws 57. Therefore, the arm 25E rotates integrally with the rotating member 55. The second rotation mechanism portion 22F is configured in the same manner as the second rotation mechanism portion 22E, and the base end portion 25Fa of the arm 25F is fixed.

  The assembly of the second rotation mechanism 22E is performed as follows. First, the speaker 50 is disposed in the speaker attachment hole 10c, and the speaker front cover 51 and the speaker back cover 52 are attached. On the other hand, while holding the spring 54 in the recess of the rotating member 55 and engaging the rotating member 55 and the fixed interposed member 53, the flange portion of the fixed interposed member 53 is connected to the flange portion of the speaker back cover 52. Abut from the side and fix by screwing. At that time, the player side end of the spring 54 comes into pressure contact with the speaker back cover 52.

  Then, the flange portion of the back cover 56 is brought into contact with the flange portion of the fixed interposing member 53, and is screwed and fixed against the pressure contact. Further, the base end portion 25Ea of the arm 25E is fixed to the columnar head portion 55b of the rotating member 55 with a screw 57.

  In such a configuration, in order to rotate the arm 25E, the user presses the base end portion 25Ea of the arm 25E to the player side until the protruding engagement portion 55a comes out of the fitting hole 53a. Then, the arm 25E is rotated while pressing the base end portion 25Ea, and the pressing of the base end portion 25Ea is released at a desired rotation position. At that time, it is normal that the positions of the projecting engagement portion 55a and the fitting hole 53a are not completely coincident with each other, so that the user can hold the arm 25E without pressing the base end portion 25Ea. Rotate slightly in the direction. Eventually, when the projecting engagement portion 55a coincides with the position of the fitting hole 53a, it is fitted into the fitting hole 53a, and the arm 25E is fixed at the rotational position.

  FIGS. 13A to 13C are schematic views showing how the distance between the drum boards 20A and 20B and the main board 10 changes between the expanded state and the folded state. FIG. 5A is an operational view showing a developed state in a plan view, FIG. 5B is a developed state in a side view, and FIG.

  For example, the drum board 20A has a disk shape, and there are innumerable points constituting the outer edge thereof. Consider points P1, P2, and P3 as examples of points that are positions on the outer edge. Let L1, L2, and L3 be the shortest distances from the points P1, P2, and P3 to the main board 10 in the unfolded state (see (a) and (b) of the figure). On the other hand, in the folded state, the shortest distances from the points P1, P2, and P3 to the main board 10 are L1a, L2a, and L3a, respectively. Here, L1> L1a, L2> L2a, and L3> L3a are established.

  This is true for the position of the point P for any position on the outer edge of the drum board 20. Therefore, for the drum boards 20A and 20B, obviously, the sum of all positions on the outer edge of the drum board 20 at the shortest distance between the position on the outer edge of the drum board 20 and the main board 10 is the direction of the folded arrangement. Is smaller than in the deployed configuration. Thus, the folding arrangement can be made more compact in the thickness direction of the main board 10 than the unfolding arrangement (see also FIGS. 4 and 7).

  Further, the above-described sum total size relationship between the deployed arrangement and the folded arrangement is also established for the drum board 20G. Note that the drum boards 20C to 20F may be configured such that the magnitude relationship of the sum is established when the main board 10 is virtually extended upward.

  It should be noted that among some points on the outer edge of the drum board 20, the magnitude relationship between the unfolded arrangement and the folded arrangement may be reversed from the above. Therefore, if it is configured so that the above-described sum total is established, it is easy to configure so that it can be made compact in the thickness direction. Moreover, the magnitude relationship of the above sum is also applied to drum boards other than a circle, and for example, it can be considered in the same way for an outer edge point such as a fan shape.

  By the way, the user sets each drum board 20 in the unfolded / folded arrangement at the time of performance / storing, but the drum boards 20A to 20G and the operation panel unit 19 have the mutual deployment arrangement and the folding arrangement. It is constructed so that the displacement stroke between them does not interfere. Therefore, the user can unfold / fold the drum board 20 and the operation panel unit 19 in any order without any trouble.

  When performing, the main board 10 is erected so that the player side surface 10a faces the player, and the drum board 20 and the like are deployed. Next, a stand structure for erecting the main board 10 will be described.

  FIG. 14 is a right side view of the lower half portion of the percussion instrument device in the standing state of the main board 10, showing a part thereof in cross section. 15 is a cross-sectional view taken along the line DD of FIG. Since the standing state of the main board 10 shown in FIG. 14 is also the standing state of the leg portion 60, hereinafter, when simply referred to as “standing state”, both the main board 10 and the leg portion 60 are targeted. Shall. FIG. 16A is a side view of the lower half of the percussion instrument device showing a state in the middle from the standing state of the leg 60A to the folded state. FIG. 16B is a side view of the lower half portion of the percussion instrument device showing the folded state of the leg portion 60A. 14 shows the same state as FIG. 4, and FIG. 16 (b) shows the same state as FIG.

  The stand structure mainly includes a leg portion 60, a link arm 70, a projecting stay 67, a pair of simple holding members 72, and a metal fitting 66. Although this stand structure is configured at four locations, since all the configurations are the same, the leg portion 60A and corresponding components will be described as a representative.

  As shown in FIG. 14, the leg portion 60 </ b> A is made of a metal and the like, and the lower end portion 60 a is grounded in the standing state. Strictly speaking, it is grounded via a grounding member attached to the lower end 60a. An intermediate stay 61 projects from the intermediate portion 61 in the longitudinal direction of the leg portion 60A on the main board 10 side. In the vicinity of the middle between the lower end 60a and the intermediate stay 61, an engagement hole 62 penetrating in the left-right direction is formed. An engagement recess 63 and a flange 65 are formed on the upper end 60b of the leg 60A.

  FIG. 17A is a modified example to be described later, but the configuration of the metal fitting 66, the engaging recess 63 of the leg 60A and the flange 65 is the same, and these will be described with reference to FIG. . The engagement recess 63 has a U-shape opening upward as viewed from the side, and has a contact surface 64 facing the customer side in a standing state and a horizontal bottom surface 63a. In addition, a flange portion 65 is formed to project upward from the customer side of the bottom surface 63a.

  On the other hand, the metal fitting 66 is attached to the main board 10. The metal fitting 66 is provided with an engagement portion 66a, and an engagement hole 66b is formed in a portion below the engagement portion 66a. The engagement hole 66b is configured to have a size that allows the flange portion 65 to be inserted and removed. The lower surface of the engagement hole 66b is a slope so that the flange 65 can be easily inserted and removed. The engaging portion 66 a of the metal fitting 66 is configured to have a thickness that can be loosely fitted into the engaging recess 63.

  As shown in FIGS. 14 and 15, in the main board 10, a protruding stay 67 is fixedly provided in the vicinity of the middle between the metal fitting 66 and the foot pedal mounting portion 14. The base end portion 70 a of the link arm 70 is connected to the distal end portion of the projecting stay 67 via a rotation shaft 68, and the link arm 70 extends along a plane orthogonal to the left-right direction around the rotation shaft 68. And can be rotated freely. The free end portion 70b of the link arm 70 is connected to the intermediate stay 61 of the leg portion 60A via a rotation shaft 69. Thereby, the leg portion 60 </ b> A is rotatable about a rotation shaft 69 along a plane orthogonal to the left-right direction.

  Further, the pair of simple holding members 72 are fixed to the tip portions on the left and right sides of the projecting stay 67, and projecting portions 73 are formed inside the simple holding members 72 so as to face each other (see FIG. 15). ). On the other hand, an engagement hole 71 corresponding to the protrusion 73 is formed in the protruding stay 67. In the standing state, both protrusions 73 are fitted in the engagement holes 71, and the link arm 70 is stabilized at the rotation position. Accordingly, the leg portion 60A is also stable in the standing state. On the other hand, in the folded state of the leg portion 60A, both the protrusions 73 are fitted into the engaging holes 62 of the leg portion 60A, and the leg portion 60A is stabilized in the folded state (see FIG. 16B). Engagement / disengagement between the protrusion 73 and the engagement holes 71, 62 is enabled by intentional force that moves the leg portion 60A of the user.

  In such a configuration, the leg 60 is erected / folded as follows. First, in the folded state shown in FIG. 16 (b), the lower end 60 a of the leg 60 A is gripped, and the lower end 60 a is pulled in a direction away from the main board 10. Then, when the engagement between the projection 73 of the simple holding members 72 and the engagement hole 62 of the leg 60A is disengaged and the lower end 60a is further pulled, the link arm 70 rotates in the clockwise direction of FIG. The leg portion 60A is separated from the main board 10 and / or rotated counterclockwise.

  Then, by operating the leg portion 60A, the link arm 70 is once rotated to a position (see FIG. 16A) that is slightly rotated further clockwise than when the leg portion 60A is standing. That is, the link arm 70 is rotated until the engagement hole 71 of the link arm 70 is once engaged with the protrusion 73 and positioned below the protrusion 73 beyond the protrusion 73. This operation is performed in order to position the flange portion 65 of the upper end portion 60b so that it can pass through the engagement hole 66b (see FIG. 17) of the metal fitting 66 in the height direction, and the upper end portion of the leg portion 60A. This is performed until or after 60b comes close to the main board 10.

  Next, in this state, the flange portion 65 is inserted into the engagement hole 66b, and then the entire leg portion 60A is moved upward so that the engagement recess 63 is engaged with the engagement portion 66a of the metal fitting 66. Let At that time, the link arm 70 is slightly rotated in the counterclockwise direction, and when the engagement recess 63 is engaged with the engagement portion 66a, the projection 73 and the engagement hole 71 are fitted (see FIG. 14). Such an operation is performed for all the leg portions 60. As for the order, it is easy to work from the standpoint of standing any one pair of leg portions 60 (for example, the leg portion 60A and the leg portion 60C) first.

  When the pair of leg portions 60 are erected and their lower end portions 60 are grounded, the lower end of the engaging portion 66a comes into contact with the bottom surface 63a of the engaging recess 63, so that the weight of the main board 10 is brought to the bottom surface 63a. Take it. With this force, the leg portion 60A tries to rotate in a direction in which the upper end portion 60b approaches the main board 10, but the contact surface 64 comes into contact with the opposing surface of the metal fitting 66, and the leg portion 60A rotates. It is regulated (see FIGS. 14 and 17).

  That is, the leg portion 60A and the leg portion 60C receive the weight of the main board 10 at their respective bottom surfaces 63a, while the respective contact surfaces 64 press-hold the corresponding metal fitting 66. Since the forces received from the contact surfaces 64 on both sides are balanced, the main board 10 does not receive a force that induces deformation such as an excessive bending moment. Thereby, the main board 10 is stably hold | maintained in parallel with a perpendicular direction. Further, since the upper end of the heel portion 65 is above the lower end of the engaging portion 66a, even if the upper end portion 60b of the leg portion 60A is pulled toward the player side, the heel portion 65 is caught by the engaging portion 66a. The engagement between the engagement portion 66a and the engagement recess 63 cannot be easily released. Therefore, the collar portion 65 fulfills a simple engagement maintaining function.

  When the leg portion 60A is folded in order to store the device, a process reverse to that at the time of standing is followed. That is, after the lower end portion 60a is slightly lifted from the floor surface and the entire leg portion 60A is moved downward, the engagement between the engagement portion 66a and the engagement recess 63 is released (see FIG. 16A). The flange portion 65 is removed from the engagement hole 66b. Thereafter, the leg portion 60A is rotated clockwise and moved to a position parallel to the main board 10 (see FIG. 16B). The protrusion 73 is fitted into the engagement hole 62 of the leg 60A, and the folding of the leg 60A is completed.

  Here, in the folded state of the percussion instrument device, as shown in FIG. 6, all the drum boards 20 </ b> A to 20 </ b> G and the operation panel unit 19 fit inside the outer edge 11 of the main board 10 when viewed from the front. Moreover, all the leg portions 60 are also fitted inside the outer edge 11 by being folded. Thus, the whole percussion instrument device can be made compact in the surface direction of the main board 10 (direction parallel to the player side surface 10a of the main board 10) during storage.

  FIG. 17A is a cross-sectional view showing a modification of the engaging portion between the upper end portion 60b of the leg portion 60A and the metal fitting 66. FIG. FIG. 4B is a front view showing the modification. As described above, the collar portion 65 performs a simple engagement maintaining function. However, in the modification shown in FIG. 17, a lock mechanism that more reliably secures the engagement between the engagement portion 66 a and the engagement recess 63 is provided. Provide.

  First, the block 74 is fixed to the player side of the metal fitting 66 just to the right of the upper end 60b of the leg 60A. A pin 76 that is slidable in the left-right direction is provided in the block 74, and the pin 76 has a knob 75 and is configured to be slidable. On the other hand, a hole 77 through which the pin 76 can be inserted and removed is formed in the upper end portion 60b of the leg portion 60A along the left-right direction.

  In such a configuration, with the engaging portion 66 a and the engaging recess 63 engaged, the pin 76 is slid leftward with the knob 75 and the pin 76 is inserted into the hole 77. Thereby, it locks in the engagement state of the engaging part 66a and the engaging recessed part 63. FIG. Therefore, even if the main board 10 is held and lifted upward, the upper end portion 60b of the leg portion 60A is not separated from the metal fitting 66. This makes it easy to move the entire percussion instrument device with the main board 10.

  According to the present embodiment, the drum board 20 is unfoldable / foldable with respect to the main board 10, so that it is suitable for performance in the unfolded state, while the percussion instrument device can be easily and compactly accommodated by folding. it can. In particular, when the drum board 20 is folded, the drum board 20 is closer to the main board 10 and closer to the main board 10 than the unfolded arrangement. The main board 10 can be made compact in the thickness direction.

  Further, in the folded arrangement, the drum board 20G is in a stacked state with respect to the drum board 20A at a fixed position overlapping the main board 10, and the drum board 20G is closer to the drum board 20A than in the unfolded arrangement. Moreover, since both the drum boards 20A and 20G are close to each other in parallel with the main board 10 (see FIGS. 6 to 8), the percussion instrument apparatus having the drum board 20G corresponding to the hi-hat cymbal can be compactly accommodated. can do.

  In addition, the drum boards 20C to 20F are attached to the free ends of the corresponding arms 25 through the rotary necks 23C, 23D, 24E, and 24F so that the angle can be changed (see FIGS. 2, 4, and 7). ), The degree of freedom of the folding mode can be increased. Thereby, it is possible to adjust the angle in the deployed arrangement (during performance) of the drum boards 20C to 20F, but to make it parallel to the main board 10 in the folded arrangement.

  The drum board 20G is connected to the arm 25A via a link mechanism including a connecting arm 25G1, a first rotating mechanism portion 21G1, an arm 25G2, and a first rotating mechanism portion 21G2, and its angle and position are variable. (See FIG. 10). Thereby, the arrangement | positioning state can be changed into the state which adjoined and laminated | stacked with respect to 20 A of drum boards, and the state which separated from the drum board 20A and became parallel. Therefore, compared with the configuration in which the arms 21G1 to 25G2 are directly connected to the main board 10, the arm 25G2 is small, which contributes to the compactness of the device. In addition, when the drum boards 20A and 20G are stacked, the arm 25G2 is sandwiched between the drum boards 20A and 20G to be stacked on the drum boards 20A and 20G (see FIG. 8). Therefore, the arm 25G2 is not bulky and contributes to the compactness of the apparatus.

  Further, in the folded state, all the drum boards 20, the leg portions 60, and the operation panel portion 19 are accommodated inside the outer edge 11 of the main board 10 at the time of front view. The board 10 can be made compact in the surface direction.

  Further, the drum boards 20A to 20G and the operation panel unit 19 do not interfere with each other in the displacement process for expanding / folding. It can be properly displaced and can always be properly deployed / folded.

  From the viewpoint of making the drum board 20 foldable with respect to the main board 10 and easily storing the drum board 20 in a compact manner, the drum board 20 may be close to the main board 10 in parallel as described above. Most desirable. However, the present invention is not limited to this, and from the viewpoint of facilitating compactness in many models, the entire distance on the outer edge of the drum board 20 is the shortest distance between the position on the outer edge of the drum board 20 and the main board 10. What is necessary is just to comprise so that the sum total regarding a position may become smaller at the time of folding arrangement | positioning than at the time of unfolding arrangement | positioning (refer FIG. 13).

  Further, according to the present embodiment, the main board 10 is provided with the bass drum board 12 fixedly disposed on the player side surface 10a in the frame portion 13 reminiscent of the bass drum, and the speaker 17 is viewed from the front. It was arranged in the frame 13 and at a position avoiding the bass drum board 12 (see FIG. 3). Thus, it is possible to simplify the wiring connection by eliminating the need for the external wiring to the speaker 17 while ensuring the protection of the speaker 17 from the hit of the bass drum board 12. In addition, sound is generated from the vicinity of the bass drum board 12 and the sound emission part of the speaker 17 faces the player side, so that the reality of sound generation increases. Furthermore, since the substrate 18 is provided in the case portion 15, the wiring between the speaker 17 and the substrate 18 can be shortened.

  Also according to the present embodiment, the drum boards 20E and 20F are rotatably disposed on the second rotation mechanism portions 22E and 22F via the arms 25E and 25F, and the second rotation mechanism portions 22E and 22F are arranged. In each of the 22Fs, built-in speakers 50 for generating musical sounds resulting from the hitting of the drum boards 20E and 20F (see FIG. 12). Accordingly, it is possible to increase the reality by causing the musical sound due to the individual hits of the drum boards 20E and 20F to be generated from the fixed speaker 50 in the vicinity of the hit position. In addition, since the musical sound generating mechanism is housed in the second rotating mechanism portions 22E and 22F that are rotating mechanisms, the structure is compact.

  According to the present embodiment, the main board 10 stands up by engaging the engaging portion 66a of the leg portion 60 with the engaging recess 63 of the metal fitting 66 and grounding the lower end portion 60a of the leg portion 60. On the other hand, the engagement between the engagement portion 66a and the engagement recess 63 is released, and the leg portion 60 and the link arm 70 are folded by bringing the leg portion 60 close to the main board 10 in parallel ( 14 to 16). Therefore, the thin main board 10 can be erected and held with a simple operation, and can be prevented from being bulky when the apparatus is stored.

  Further, in the standing state, the protrusion 73 provided on the protrusion stay 67 is fitted in the engagement hole 71 of the link arm 70, while in the folded state of the leg 60A, the protrusion 73 is It is fitted into the engagement hole 62 of 60A (see FIGS. 15 and 16B). Thereby, both the standing state of the main board 10 and the folded state of the leg portion 60A and the link arm 70 can be made more stable. It should be noted that the configuration is not limited to these, since it is not limited to the protrusion 73 and the engagement holes 71 and 62, and a light regulation force can be applied to the rotation of the link arm 70 by engagement such as fitting. For example, the concave / convex relationship may be reversed.

  Further, the engaging recess 63 receives the weight of the main board 10 by the bottom surface 63a, and presses the upper end 60b of the leg 60A to the main board 10 side by the contact surface 64. Stable holding of the main board 10 is realized.

  In addition, since the leg portion 60, the link arm 70, the engaging portion 66a, and the engaging concave portion 63 are provided in two pairs symmetrically and spaced apart on the player side and the customer side of the main board 10 with the main board 10 in between. In the standing state, the lower end edge of the main board 10 can be in a floating state in which it is completely separated from the floor surface.

  In terms of the main board 10 in a standing state, at least a pair of leg portions 60 and the like may be provided. For example, a pair of legs 60 and the like are provided at the left and right ends, a grounding protrusion is provided at the lower edge of the main board 10 far from the arrangement position, and the grounding protrusion is directly grounded. You may comprise so that it may stand by point support. In such a case, the upper edge of the main board 10 may be configured to be parallel to the left-right direction when the upright state is set. Even in this case, at least a portion of the lower edge of the main board 10 where the leg portions 60 and the like are disposed can be floated when the main board 10 is erected.

  In the present embodiment, the main board 10 may be fixedly provided with a drum board other than the bass drum board 12.

  As long as the drum board 20 is foldable with respect to the main board 10 and the apparatus is easily accommodated in a compact manner, the apparatus may be an acoustic percussion instrument rather than an electronic drum. Further, a percussion instrument device in which each drum board 20 is a practice pad that does not have a hit sensor may be used.

  The shape of the main board 10 is preferably a flat plate shape as in the above-described embodiment from the viewpoint of stable holding of the drum board 20, but if it is limited to storing the device easily in a compact manner, It is not restricted and may be curved. Alternatively, the main board 10 may have a net shape.

  In addition, about each drum board 20 and the operation panel part 19, you may provide the mechanism which regulates the rotation range and determines the position of expansion | deployment arrangement | positioning and folding arrangement | positioning to a fixed position. Such a mechanism may be provided in, for example, the first rotation mechanism portion 21 and the second rotation mechanism portion 22, or a member that contacts each drum board 20 or the like is fixed to the main board 10 or the like. Also good. As a result, the drum board 20 and the like are always expanded / folded at the same position regardless of who is doing, and the same expanded state and folded state can be reproduced.

  Note that, when the drum board 20G is configured to be stacked on the drum board 20A, the drum boards 20A and 20G may be configured to be displaceable via an arm member other than the arms 25A, 25G1, and 25G2. Further, the configuration for displacing the drum board 20G is not limited to the configuration that can be freely rotated via the arm members (arms 25G1, 25G2) attached to the arm 25A. For example, similarly to the drum board 20A, the main board 10 may be provided so as to be rotatable via an arm member, and may be stacked on the drum board 20A when folded.

(Second Embodiment)
In the first embodiment, the stand structure is applied to the percussion instrument device. However, the present invention is not limited to this, and the present stand structure can be applied to various devices that are installed upright. In the second embodiment of the present invention, an example applied to a speech table will be described.

  FIG. 18 is a side view of a speech stand to which the stand structure according to the second embodiment of the present invention is applied. FIG. 19 is a perspective view of the speech stand viewed obliquely from below. FIG. 18 and FIG. 19 both show the unfolded state of the speech stand. The right side in FIG. 18 is the speaker side, and the left side is the customer side.

  First, as shown in FIGS. 18 and 19, this stand structure mainly includes a leg portion 84, a link arm 85, a projecting stay 86, and a metal fitting 99, which are the leg portions in the first embodiment. 60, the link arm 70, the protruding stay 67, and the metal fitting 66 are configured in the same manner. Although not shown, the pair of simple holding members 72 are also provided in the same manner as in the first embodiment. Since other configurations are the same as those of the stand structure of the first embodiment, description thereof will be omitted.

  However, in the present embodiment, only one leg 84 or the like is provided on the speaker side of the main plate 80 and is not provided on the customer side. Therefore, at the time of standing, as shown in FIG. 18, the main plate 80 is held upright by the two grounding portions 81 and the leg portions 84 provided at both ends of the lower end of the main plate 80. The manner in which the legs 84 are folded is the same as that of the legs 60 in the first embodiment, and the legs 84 are close to each other in parallel with the main plate 80 (two-dot chain line in FIG. 19).

  On the other hand, in the present embodiment, the stand structure is also used for a mechanism for holding the upper plate 83 horizontally. First, the upper plate 83 is rotatably attached to the upper end portion of the main plate 80 with a hinge 82. The metal plate 99 is provided on the speaker side of the upper half of the main plate 80, and the arm portion 87, the link arm 88, and the protruding stay 89 corresponding to the leg portion 84, the link arm 85, and the protruding stay 86 are also provided. These are configured and arranged symmetrically with respect to the lower stand structure.

  As shown in FIG. 19, a concave groove 83 a with which the upper end portion of the arm portion 87 abuts and engages is formed on the lower surface of the upper plate 83. Further, a locking mechanism 90 is provided immediately on the side of the concave groove 83a. This locking mechanism 90 is the same as that shown in FIGS. 17A and 17B, and a pin that is slidable in the left-right direction is built in the upper plate 83, and the pin has a knob 91. It is configured to be slidable. Note that it is not essential to provide the concave groove 83a and the lock mechanism 90.

  In such a configuration, in order to hold the upper plate 83 horizontally, the engagement recess (the engagement recess 63, see FIG. 17A) at the lower end of the arm portion 87 is used as the engagement portion (engagement) of the metal fitting 99. And the upper end portion of the arm portion 87 is brought into contact with the recessed groove 83a and locked by the lock mechanism 90. On the other hand, when the upper plate 83 is folded, the arm portion 87 is brought close to the main plate 80 in the same manner as the leg portion 84. Thereafter, the upper plate 83 is folded to the speaker side of the main plate 80. Here, in order to release the engagement between the engagement concave portion of the arm portion 87 and the engagement portion of the metal fitting 99, the upper plate 83 needs to be temporarily rotated counterclockwise in FIG. Since there is a gap between the lower surface of the customer-side end portion 83 and the upper end portion of the main plate 80 (see FIG. 18), there is no problem.

  According to the present embodiment, the thin main plate 80 can be erected and held with a simple operation, and the same effect as that of the first embodiment can be achieved with respect to preventing the bulky main plate 80 from being bulky during storage.

  Further, since the same stand structure is used for horizontal holding of the upper plate 83, the upper plate 83 can be held at a predetermined angle by a simple operation, and the upper plate 83 can be prevented from being bulky during storage.

  In the second embodiment, the structure in which the leg portions are provided only on one side of the front and back sides and the main portion is erected obliquely can also be applied to the percussion instrument device in the first embodiment. That is, at least one leg portion is provided only on one of the player side surface 10a and the customer side surface 10b of the main board 10, and the main board 10 is erected diagonally by grounding the leg portion and the lower edge of the main board 10. You may comprise so that it may hold | maintain.

  In the first and second embodiments, the engaging recess 63 and the engaging portion 66a are not limited to the above-described configuration, and at least the function of receiving the weight of the main board 10 and the main board 10 are pressed. What is necessary is just to comprise so that it may have a function. For example, the following modifications can be considered.

  FIG. 20A is a cross-sectional view showing a modified example of the engaging recess 63 and the engaging portion 66a with respect to the first and second embodiments, and FIG. 20B is a front view thereof.

  The first embodiment will be described as an example. In the first embodiment, the bottom surface 63a of the engaging recess 63 receives the weight of the main board 10 and the contact surface 64 is formed on the metal fitting 66 or the main board 10. It was the structure which contact | abutted (refer Fig.17 (a)). On the other hand, in this modified example, instead of the engaging portion 66a, an engaging projection 94 is projected from the main board 10 on the player side, and the tip of the engaging projection 94 is a hanging portion 94a that hangs downward. Yes. Further, in place of the contact surface 64, an upper end portion of the leg portion 92 corresponding to the leg portion 60 is formed with an abutment surface 92a that abuts against the main board 10 when standing. Further, instead of the engagement recess 63, a U-shaped engagement recess 93 having a U-shape in front view is formed at the upper end portion of the leg portion 92. These are also configured on the customer side of the main board 10 and make a pair with each other.

  In this configuration, the engagement protrusion 94 is engaged with the U-shaped engagement recess 93 on both the customer side and the player side of the main board 10. Then, the U-shaped engaging recess 93 receives the weight of the main board 10 through the engaging protrusion 94. On the other hand, the contact surface 92 a presses the main board 10. The dynamic state at this time is the same as that in the first embodiment. In addition, the drooping portion 94 a performs a simple engagement maintaining function for suppressing the engagement protrusion 94 from coming off from the U-shaped engagement recess 93, similarly to the flange portion 65.

  The above configuration is applicable as long as the rotating member is not limited to the upper plate 83 and should be held at a predetermined angle. Moreover, the stand structure of 1st, 2nd embodiment is applicable besides a percussion instrument apparatus and a speech stand, for example, it is necessary to stand up a blindfold board for an examination room, or a thin plate member. It can also be applied to various furnishings. It is particularly suitable for those that are often moved or stored.

  Further, as shown in FIG. 20C, the present invention can also be applied to a panel type display. That is, the present invention can also be applied to a structure in which the main portion 95 having the thin display portion 96 such as an LCD is held upright by the four leg portions 97. In this example, the leg 97 is disposed avoiding the position of the speaker 98. Even in such a case, as described above, only one pair of leg portions 97 may be provided, and the main portion 95 may be erected with three-point support.

  In the percussion instrument device according to the first embodiment and the speech stand according to the second embodiment, the leg portions 60 and 84 are grounded. However, the present invention is not limited to this. For example, a rotatable plate member similar to the upper plate 83 (see FIGS. 18 and 19) is provided below, the lower surface of the plate member is grounded, and the lower ends of the leg portions 60 and 84 are connected to the plate. It may be configured to abut against a groove provided on the upper surface of the member or the upper surface of the plate member. In other words, the speech board in the second embodiment is turned upside down and the upper plate 83 is grounded to the floor surface.

1 is a perspective view of a percussion instrument device to which a stand structure according to a first embodiment of the present invention is applied. It is a perspective view of the percussion instrument device. It is a front view (figure seen from the player side) in the expansion | deployment state of this percussion instrument apparatus. It is a left view in the development state of this percussion instrument device. It is a top view in the development state of this percussion instrument device. It is a front view in the folded state of this percussion instrument apparatus. It is a left view in the folding state of this percussion instrument apparatus. It is a top view in the folded state of this percussion instrument apparatus. It is sectional drawing which follows the AA line of FIG. It is the partial bottom view which looked at the drum board from the downward direction. FIG. 7 is a perspective view of the first rotation mechanism section (FIG. (A)), and a cross-sectional view of the first rotation mechanism section along the line BB in FIG. 6 (FIG. (B)). It is sectional drawing of the 2nd rotation mechanism part in alignment with CC of FIG. Schematic diagram (Figures (a) and (b)) of the unfolded state and how the distance between the drum board and the main board changes between the unfolded state and the folded state (Figure ( c)). The lower half part of the percussion instrument apparatus in the standing state of the main board is a right side view showing a part thereof in cross section. It is sectional drawing which follows the DD line | wire of FIG. Side view of the lower half part of the percussion instrument device showing the state from the standing state of the leg part to the folded state (figure (a)), side view of the lower half part of the percussion instrument device showing the leg part folded state (figure (a)) (B)). It is sectional drawing (figure (a)) and front view (figure (b)) which show the modification of the engaging part of the upper end part of a leg part, and a metal fitting. It is a side view of the stand for speeches to which the stand structure concerning the 2nd Embodiment of this invention is applied. It is the perspective view which looked at the stand for the speech from diagonally downward. It is sectional drawing (a figure (a)) which shows the modification with respect to 1st, 2nd embodiment of an engaging recessed part and an engaging part, and a front view (figure (b)).

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Main board (main part), 60, 84 Leg part (leg member), 62 Engagement hole (Fitting correspondence part at the time of folding), 63 Engagement recessed part (engagement part), 63a Bottom face (1st contact part) 64 abutting surface (second abutting portion), 66a engaging portion (engaging corresponding portion), 70, 85, 88 link arm (auxiliary member), 71 engaging hole (fitting corresponding portion when standing), 73 Projection part (fitting part), 80 Main plate (main part, support), 83 Upper plate (rotating member), 87 Arm part (arm member)

Claims (6)

A stand structure for holding the thin main part in an upright state,
An auxiliary member having one end pivotably connected to the main portion and the other end pivotable about the one end;
A leg member in which an intermediate part between one end and the other end is rotatably connected to the other end of the auxiliary member;
An engaging portion provided at the one end of the leg member;
An engagement corresponding portion provided in the main portion corresponding to the engagement portion of the leg member,
The engaging portion of the leg member is engaged with the engaging corresponding portion of the main portion, and the posture of the leg member is set such that the other end of the leg member receives a force from the floor surface. Then, while the main portion is in the standing state, the engagement between the engagement portion and the engagement corresponding portion is released, the leg member is brought close to the main portion, and the leg member is moved to the main portion. A stand structure, wherein the leg member and the auxiliary member are in a folded state by bringing the main part closer to a parallel state than when the main part is in an upright state.   2. The leg member, the auxiliary member, the engagement portion, and the engagement corresponding portion are provided at least in pairs symmetrically across the main portion on both sides of the main portion. Stand structure.   A fitting portion provided fixedly with respect to the main portion, and a fitting at the time of standing that is provided on the auxiliary member and is fitted to the fitting portion when the main portion is in the standing state. The stand structure according to claim 1, further comprising a corresponding portion.   A folding part fixed to the main part and a folding part provided on the leg member and fitted into the fitting part when the leg member and the auxiliary member are in the folded state. The stand structure according to any one of claims 1 to 3, further comprising a fitting corresponding part.   The engagement portion of the leg member includes a first contact portion that receives a downward force from the engagement corresponding portion when the main portion is in the standing state, and the main portion is in the standing state. And a second contact portion that receives a force from the engagement corresponding portion toward the side on which the leg member is located. The stand structure according to the item. A stand structure for holding the rotating member at a predetermined angle on the support,
An auxiliary member having one end rotatably connected to the support and the other end rotatable around the one end;
An arm member in which an intermediate portion between one end and the other end is rotatably connected to the other end of the auxiliary member;
An engagement portion provided at the one end of the arm member;
An engagement corresponding portion provided on the support body corresponding to the engagement portion of the arm member,
The engaging portion of the arm member is engaged with the engaging corresponding portion of the support body, and the rotating member is supported on the other end of the arm member, whereby the rotating member is rotated with respect to the support body. While the moving member is held at the predetermined angle, the engagement portion and the engagement corresponding portion are disengaged, the arm member is brought close to the support body, and the arm member is attached to the support body. On the other hand, a stand structure characterized in that the arm member and the auxiliary member are folded by bringing the arm member closer to a parallel state than when the arm member is held at the predetermined angle.

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