JP2006036008A - Small-sized planing boat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small-sized planing boat capable of making stable running both in straight advancing and revolving by changing the chine width. <P>SOLUTION: Mounting recesses 20a and 20b are formed at both the sides of the rear of a hull 11 and fitted with auxiliary hulls 21a and 21b in such a way as capable of being elevated and sunk by an elevating/sinking mechanism. When the auxiliary hulls 21a and 21b have lowered, part of the coasting surface is formed, and separation is made from the coasting surface when the auxiliary hulls 21a and 21b have risen. The length of the recesses 20a and 20b is set to 25% or more of the overall length of the hull 11 from the stern of the hull 11. The elevating/sinking mechanism is formed in a link mechanism consisting of coupling levers 24a and 24b, supporting shafts 29a, 29b, 32a, 32b, a supporting hole 31, etc. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a personal watercraft capable of stable traveling both when traveling straight and when turning.

2. Description of the Related Art Conventionally, for example, a so-called flap device provided with a protrusion having an inclined bottom surface is provided at the bottom of a hull of a small ship. There is one that can be effectively shifted to a state (for example, Patent Document 1). In addition, there is a small planing boat that has a spongson that can be adjusted to move up and down on both sides of the hull, and that can run stably by adjusting the sponsons according to the size and number of riders (for example, Patent Document 2).
Japanese Utility Model Publication No. 58-129287 JP 10-76990 A

  However, in the former small vessel among the conventional small vessels described above, the trim angle (difference between the bow and stern draft) can be adjusted, but the bank angle at the time of turning (the inclination of the small vessel during turning) can be adjusted. There is a problem that it cannot be changed greatly. In addition, the latter small planing boat can change the maneuvering characteristics when turning, but the maximum bank angle (maximum tilt angle of the small planing boat within the range where the water inlet of the jet propulsion device does not come out in the air) There is a problem that it cannot be changed.

  The present invention has been made to cope with the above-described problems, and an object of the present invention is to provide a small personal watercraft that can stably travel both when going straight and when turning by changing the chain width. That is.

  In order to achieve the above object, the structural features of the personal watercraft according to the present invention are as follows. The mounting recesses are formed at the boundary between the both sides and the bottom of the rear part of the hull. The auxiliary hull is attached in a state in which the position can be changed in the vertical direction by the lifting mechanism, and when the auxiliary hull is positioned below, the auxiliary hull constitutes a part of the sliding surface of the hull.

  In the personal watercraft according to the present invention configured as described above, mounting concave portions are formed on both sides of the rear portion of the hull, and the auxiliary hull is attached to both mounting concave portions in a state in which the position can be changed in the vertical direction. And when an auxiliary hull is located below by the action | operation of an raising / lowering mechanism, the auxiliary hull comprises a part of sliding surface. Therefore, when the auxiliary hull is lowered, the chine width (the width between the boundary portions of the hull side and the bottom) is widened, and when the auxiliary hull is raised, the chine width is narrowed.

  A small planing boat with a wide chine width improves stability in the left-right direction, so even beginners can easily maneuver, but when the small planing boat is tilted greatly during turning, the small planing boat has a jet propulsion device. If it is a thing, a jet pump water supply port will come out in the air and lose propulsion. For this reason, sporty turning with a large bank angle cannot be performed. In addition, a small planing boat with a narrow chine width can perform a sporty turn with a large bank angle at the time of turning, but since the stability in the left-right direction is deteriorated, the skill of the operator is required. For this reason, it is difficult for beginners to maneuver.

  The personal watercraft according to the present invention is configured to change the characteristics of the personal watercraft by deforming the hull form by moving the auxiliary hull up and down. That is, when the auxiliary hull is lowered, it becomes a small planing boat with good stability, and when the auxiliary hull is raised, it becomes a small planing boat with excellent movement performance during turning. Moreover, since the auxiliary hull is attached to the mounting recessed part formed in the rear part both sides of the hull, it does not become resistance at the time of a small planing boat traveling. For this reason, the small planing boat can maintain an appropriate traveling state without causing a decrease in speed or unnatural behavior.

  Further, the auxiliary hull may be constituted by a horizontally installed plate-like one, or a substantially vertical side surface portion that is formed along the side portion of the hull having a cross-sectional shape formed in an L shape, and a side surface portion. You may comprise by the plate-shaped thing provided with the bottom face part extended substantially horizontally toward the outer side of a hull from the lower end of this. In addition, the auxiliary hull may be formed in a box shape or a block shape. When the auxiliary hull is constituted by a horizontal plate shape or an L-shaped plate shape, the structure becomes simple and the manufacture becomes easy. Further, when the auxiliary hull is configured in a box shape or a block shape, sufficient buoyancy is generated when the auxiliary hull is lowered while the small planing boat is stopped, so that stability is improved.

  Another feature of the personal watercraft according to the present invention is that the mounting concave portion is located more on the bow side than the portion located on the bow side by 25% of the length in the longitudinal direction of the hull from the stern of the hull. It is formed from the side part to the stern. In this case, 25% is the minimum value of the preferable range obtained by the test, and at least the length of the mounting recess is preferably set to be longer than 25% of the length in the front-rear direction of the hull.

  Still another structural feature of the personal watercraft according to the present invention is that a link mechanism that provides a rotation support portion at the front portion and the rear portion of the auxiliary hull and connects the auxiliary hull to the hull via both rotation support portions. That is, the lifting mechanism is configured.

  According to this, an elevating mechanism for moving the auxiliary hull up and down with a simple structure can be obtained. In this case, the rotation support portion can be constituted by a shaft portion, a shaft hole, or the like. And as a link mechanism, a pair of shaft holes and shaft portions that can rotatably engage both rotation support portions composed of shaft portions and shaft holes with the both rotation support portions are provided at one end. It can connect with one end parts, such as a lever, and can make it the structure which connected the other end parts, such as a pair of levers, to the hull side so that rotation was possible. In this case, the other end of the pair of levers and the hull side are also connected by assembling the shaft and the shaft hole. Further, the auxiliary hull can be rotated around the front rotation support portion, and the rear rotation support portion can be rotatably connected to the hull side with a lever or the like. In this case, the engagement position between the rotation support portion and the lever or the like is movable by sliding or the like.

  In addition, another structural feature of the personal watercraft according to the present invention is that a rotating shaft extending from starboard to port is provided at the stern of the hull, and the rear portion of the auxiliary hull is connected to both ends of the rotating shaft via connecting levers. The rotation support unit is rotatably connected, and a rotation driving device for rotating the rotation shaft around the axis is connected between both ends of the rotation shaft.

  According to this, the rear side of the auxiliary hull can be moved up and down by driving the rotation drive device and rotating the rotation shaft. In addition, the left and right auxiliary hulls can be installed at the same height, and can be moved up and down synchronously. Further, the auxiliary hull can be reliably held by the rotating shaft and the connecting lever. In this case, the rotation support portion at the front of the auxiliary hull may be connected to the hull side via a rotatable connecting lever or the like, or may be rotatable around a rotation fulcrum such as a shaft portion or a shaft hole. Good.

  In this case, an engagement position between the rotating shaft and the connecting lever is made movable by providing a long hole in the connecting lever. In addition, as the rotation drive device, for example, a device that fixes a lever to a rotation shaft, connects an operation cable to the lever, and pulls the operation cable by rotation of a motor to rotate the rotation shaft can be used. According to this, two auxiliary hulls can be moved up and down with one operating cable.

  Still another structural feature of the personal watercraft according to the present invention is that the rotation support portion provided at the front portion of the auxiliary hull is configured with an auxiliary support shaft or an auxiliary support hole whose bow side is high and stern side is low. In addition, the hull side is provided with a support hole in which the bow side is high and the stern side is low and the auxiliary support shaft is movably engaged, or a support shaft that is movably engaged with the auxiliary support hole. According to this, since not only the rear side of the auxiliary hull but also the front side moves upward, the chine width can be narrowed over the entire portion where the mounting recess is formed, and the effect produced when the chine width is narrowed Becomes larger. Further, since the water does not hit the front part of the auxiliary hull, the resistance received from the water is reduced.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 and 2 show a personal watercraft 10 according to the embodiment. In this personal watercraft 10, the hull 11 is composed of a deck 11a and a hull 11b, and the peripheral portions of the deck 11a and the hull 11b are joined in a water-tight manner to form a gunnel portion 11c around the hull 11. Yes. A steering handle 12 is provided in the approximate center of the upper portion of the hull 11, and a seat 13 is provided behind the steering handle 12.

  The steering handle 12 is coupled to the hull 11 via a connecting portion 12b that is mounted so as to be rotatable in the vertical direction around a support shaft 12a provided on the front side of the deck 11a. For this reason, the steering handle 12 can be rotated in the vertical direction together with the connection portion 12b, and can be rotated in the left-right direction with respect to the rear end portion of the connection portion 12b. The seat 13 can be moved forward and backward from the hull 11. When the small planing boat 10 is driven while the driver is standing, the seat 13 is stored on the rail 13a in the hull 11 and the driver sits down. When the personal watercraft 10 is operated in the state where it is in a state of being pulled, the seat 13 is pulled out from the hull 11 as shown in FIG.

  An engine 14 is provided in the center of the bottom portion in the hull 11, and an air duct 15 for guiding external air into the hull 11 is provided in a front side portion in the hull 11. The air duct 15 is formed so as to extend vertically from the upper part of the hull 11 to the bottom part of the hull 11, and sucks air outside the ship from the upper end through a waterproof structure (not shown) provided on the deck 11a. The structure which guide | induces from the part to the bottom part side in the hull 11 is taken. A fuel tank 16 for storing fuel is installed on the front side in the hull 11.

  An intake box 17 is installed between the engine 14 and the fuel tank 16 in the hull 11. The intake box 17 supplies air taken into the hull 11 through the air duct 15 to the engine 14. The fuel is also supplied from the fuel tank 16 to the engine 14. The fuel supplied from the fuel tank 16 is atomized by a fuel injection device (not shown) and injected into the cylinder of the engine 14. At this time, the fuel is mixed with the air supplied from the intake box 17 and sent to the engine 14 as an air-fuel mixture, and the air-fuel mixture explodes by ignition of an ignition device provided in the engine 14.

  A crankshaft (not shown) extends rearward from the rear portion of the engine 14. The crankshaft changes the vertical movement of a piston (not shown) due to the explosion of the air-fuel mixture into a rotational motion. An impeller shaft (not shown) is connected to the crankshaft, and the impeller shaft is connected to a jet propulsion device 18 provided at the stern of the hull 11. The impeller shaft is connected to an impeller (not shown) attached to the inside of the jet propulsion machine 18, and transmits the rotational force of the crankshaft driven by the engine 14 to the impeller to rotate the impeller.

  The jet propulsion unit 18 includes a water introduction port (see FIG. 3) 18a that opens to the bottom of the hull 11 and an injection nozzle (not shown) that opens to the stern. A propulsive force is generated in the hull 11 by spraying from the spray nozzle by the rotation of the impeller. The jet propulsion unit 18 is attached to the bottom of the stern of the hull 11 while being separated from the main body side of the hull 11 by a casing (not shown), and the impeller shaft penetrates the casing to The jet propulsion machine 18 extends from the 14 side. A steering nozzle (not shown) is attached to the rear of the injection nozzle. The steering nozzle is connected to the steering handle 12 by an operation wire, and swings to the left and right according to the operation of the steering handle 12.

  The engine 14 is connected to an exhaust device including exhaust pipes 19a and 19b and a water lock 19c. The exhaust pipe 19a sends the combustion gas discharged from the engine 14 to the water lock 19c. As shown in FIG. 4, the water lock 19c is composed of a tank having a wide lower portion and a narrow upper portion. The exhaust pipe 19a is connected to the lower side of the side surface, and the exhaust pipe 19b is connected to the upper surface. . The exhaust pipe 19b extends upward from the upper surface of the water lock 19c, and then extends downward at the rear. The downstream end of the exhaust pipe 19b opens into a casing for isolating the jet propulsion device 18 from the main body side of the hull 11 and communicates with the outside from the rear end of the hull 11.

  Further, as shown in FIG. 3, mounting recesses 20a and 20b are formed on both sides of the rear portion of the bottom of the hull 11, and the auxiliary hull 21a is mounted on the mounting recess 20a, and the auxiliary hull 21b is mounted on the mounting recess 20b. It has been. The mounting recesses 20a, 20b are formed symmetrically, and are provided from the stern of the hull 11 to the vicinity of the center in the front-rear direction of the hull 11. The lengths of the mounting recesses 20a and 20b in the front-rear direction are set to ¼ or more of the total length L of the hull 11. The auxiliary hulls 21a and 21b are attached to the hull 11 via a rotary shaft 22 attached to the inside of the gunnel portion 11c at the rear of the hull 11, and are connected to the rotary shaft 22 as shown in FIG. Yes.

  That is, the mounting brackets 23a and 23b fixed to the ceiling surface inside the gunnel portion 11c are respectively attached to the vicinity of both ends of the rotating shaft 22, and the rotating shaft 22 is connected via the mounting brackets 23a and 23b. It is attached to the gunnel portion 11c so as to be rotatable around the axis. One end of each of the connecting levers 24a and 24b is attached to both ends of the rotating shaft 22 so as to be rotatable around the axis of the rotating shaft 22, and corresponds to the other end of each of the connecting levers 24a and 24b. The rear parts of the auxiliary hulls 21a and 21b are connected.

  The auxiliary hull 21a (, 21b) is composed of a horizontally long, substantially rectangular body formed symmetrically. And the recessed part 25a (, 25b) is each formed in the inner surface (surface by the side of the ship body 11) of the auxiliary hull 21a (, 21b), and the back of the peripheral part which forms the circumference | surroundings of the recessed part 25a (, 25b) The upper part and the intermediate part at the end are notched to form a notch 26a (, 26b). Further, a corner portion where the rear surface and the upper surface of the auxiliary hull 21a (, 21b) intersect is cut out to form an inclined surface 27a (, 27b), and a corner portion where the front surface and the lower surface of the auxiliary hull 21a (, 21b) intersect. A gently inclined surface 28a (, 28b) is formed in which the lower surface side is gradual by being cut out.

  And the support shaft 29a (, 29b) as a rotation support part of this invention is attached to the rear part of the recessed part 25a (, 25b) of the auxiliary hull 21a (, 21b), and this support shaft 29a (, 29b) is respectively attached. The other end of the connecting lever 24a (, 24b) is connected in a rotatable state. Therefore, the connecting lever 24a (, 24b) can relatively rotate around the support shaft 29a (, 29b) in the notch 26a (, 26b). Further, a support hole 31 (a support hole of the auxiliary hull 21b is not shown) as a rotation support portion of the present invention is attached to the front part of the recess 25a (, 25b) of the auxiliary hull 21a (, 21b). Yes.

  The support hole 31 is formed by a long hole having an inclination with the front side being high and the rear side being low, and support shafts 32a (, 32b) fixed to the side parts of the hull 11 are respectively provided in the support holes 31. It is movable with respect to the support hole 31 and engaged in a state of being prevented from coming off. For this reason, when the rotating shaft 22 is rotated so that the other end of the connecting lever 24a (, 24b) is raised, the rear portion of the auxiliary hull 21a (, 21b) is connected to the other of the connecting lever 24a (, 24b). Ascending with the end, the front part of the auxiliary hull 21a (, 21b) engages with the support hole 31 of the support shaft 32a (, 32b) from the rear side (lower side) of the support hole 31 to the front side (upper side). Ascending while moving to.

  In addition, a lever 33 is fixed at substantially the center in the longitudinal direction of the rotating shaft 22, and the distal end of the operating cable 34 is connected to the distal end of the lever 33. The operation cable 34 is formed of a push-pull cable, and extends from an electric control unit 35 installed in the hull 11 to a lever 33 installed on the stern as shown in FIG. Advances and retracts under the control of 35 Then, as the operating cable 34 advances and retreats, as shown in FIG. 7, the rotating shaft 22 rotates and the auxiliary hull 21a (, 21b) moves up and down. The electric control unit 35 includes a motor, and the operation cable 34 is advanced and retracted by operating the motor in accordance with an operation of an operation element (not shown) provided in the vicinity of the steering handle 12.

  In the above configuration, when the driver drives the personal watercraft 10, while gripping the grip of the steering handle 12 with the switch (not shown) installed in the vicinity of the steering handle 12 turned on, The throttle lever provided near the grip is moved to the grip side. As a result, the engine 14 is driven according to the operation amount of the throttle lever. In this case, as the throttle lever is brought closer to the grip side, the engine 14 rotates at a higher speed and the small planing boat 10 runs at a higher speed. As the throttle lever is moved away from the grip, the engine 14 rotates at a lower speed and the small planing boat 10 runs at a lower speed. During this travel, the jet propulsion unit 18 is driven to jet a jet from the jet nozzle.

  In this case, when the personal watercraft 10 travels straight, the auxiliary hulls 21a and 21b are lowered. As a result, the positional relationship between the hull 11 and the auxiliary hulls 21a and 21b is as shown by the solid lines in FIGS. 8 and 9, and the chine width is the length of the portion indicated by the symbol a in FIG. When the auxiliary hulls 21a and 21b are lowered in this way, the chine width a is increased, so that the small planing boat 10 travels in a stable state with less lateral shaking.

  Further, when the small planing boat 10 is turned sharply, the auxiliary hulls 21a and 21b are raised by operating the operation element to operate the electric control unit 35. As a result, the positional relationship between the hull 11 and the auxiliary hulls 21a and 21b is as shown by the alternate long and short dash line in FIGS. 8 and 9, and the chine width is the length of the portion indicated by the symbol b in FIG. In this case, since the chine width b becomes small, the personal watercraft 10 can perform sporty turning with a large bank angle.

  In addition, a two-dot chain line c in FIG. 9 indicates the water surface when the personal watercraft 10 turns while the auxiliary hulls 21a and 21b are lowered, and a two-dot chain line d indicates the auxiliary hulls 21a and 21b. The water surface when the personal watercraft 10 turns while being raised is shown. As can be seen, when the auxiliary hulls 21a and 21b are raised, the bank angle can be greatly changed because the water inlet 18a is located in the water even when turning.

  Thus, in the personal watercraft 10 according to the present embodiment, the mounting recesses 20a and 20b are formed on both sides of the rear portion of the hull 11, and the position of the auxiliary hulls 21a and 21b is changed vertically in the mounting recesses 20a and 20b. Installed as possible. For this reason, when the auxiliary hulls 21a and 21b are positioned below, the auxiliary hulls 21a and 21b constitute a part of the sliding surface, and the chine width is increased. As a result, the small planing boat 10 has improved lateral stability, and even a beginner can easily operate the boat.

  In addition, when the auxiliary hulls 21a and 21b are positioned upward, the chine width is narrowed, and the bank angle at the time of turning is large so that sporty turning can be performed. Further, in the personal watercraft 10 according to the present embodiment, the auxiliary hulls 21a and 21b are provided via the rotating shaft 22 installed in the gannel portion 11c at the stern of the hull 11, and thus the auxiliary hulls 21a and 21b. Can be installed at the same height. Further, the auxiliary hulls 21a and 21b can be moved up and down in synchronization by the operation of the electric control unit 35. Further, since the inside of the gunnel portion 11c is originally a dead space, the dead space can be effectively used.

  Further, the rear portions of the auxiliary hulls 21a and 21b are securely held by the rotating shaft 22 and the connecting levers 24a and 24b, and the front portions are prevented from being detached from the support shafts 32a and 32b, so that the auxiliary hulls 21a and 21b are hulled. 11 is not easily removed. Further, since the device for raising and lowering the auxiliary hulls 21a and 21b is only one operating cable 34 and the motor 35, the configuration of the rotary drive device according to the present invention is simplified. In addition, since the auxiliary hulls 21a and 21b are installed in the mounting recesses 20a and 20b, the front of the auxiliary hulls 21a and 21b is prevented from being hit by water, and the auxiliary hulls 21a and 21b are provided to receive water. Resistance does not increase.

  Further, since the gently inclined surfaces 28a and 28b are formed on the lower surfaces of the auxiliary hulls 21a and 21b, when the auxiliary hulls 21a and 21b are lifted, the sliding surfaces at the bottom of the hull 11 are smoothly connected. For this reason, the water flow smoothly flows along the sliding surface, so that grass dust or the like floating on the water surface does not enter the mounting recesses 20a and 20b. Further, since the inclined surfaces 27a and 27b are formed on the upper surfaces of the rear portions of the auxiliary hulls 21a and 21b, when the auxiliary hulls 21a and 21b are lifted, the hulls 11b can be well accommodated.

  Further, the personal watercraft 10 according to the present invention is not limited to the embodiment described above, and can be implemented with appropriate modifications. For example, in the above-described embodiment, both the auxiliary hulls 21a and 21b are moved up and down simultaneously by rotating one rotating shaft 22, but a rotary drive device for moving up and down each auxiliary hull 21a and 21b. And the auxiliary hulls 21a and 21b can be moved up and down separately.

  In the embodiment described above, the auxiliary hulls 21a and 21b are formed in a horizontally long block shape. However, the auxiliary hulls 21a and 21b may be configured in a plate-like shape installed horizontally. The cross-sectional shape is L-shaped, and includes a substantially vertical side surface portion that is installed along the side portion of the hull 11 and a bottom surface portion that extends substantially horizontally from the lower end of the side surface portion toward the outside of the hull 11. You may comprise by a plate-shaped thing. Furthermore, the lengths of the mounting recesses 20a and 20b can be changed as appropriate. However, the length of the mounting recesses 20a and 20b is preferably set to be longer than 25% of the length in the front-rear direction of the hull.

  In addition, one end of a pair of connecting levers and the like is connected to the front part of the auxiliary hulls 21a and 21b in a state of being rotatable with respect to the auxiliary hulls 21a and 21b. It can also be connected in a rotatable state. In this manner, a link mechanism may be formed by the pair of connecting levers and the levers 24a and 24b. Furthermore, the support holes 31 of the auxiliary hulls 21a and 21b can be configured by holes that engage with the support shafts 32a and 32b so that the support holes 31 can rotate without being moved. In this case, for example, elongated holes are provided in the connecting levers 24a and 24b so that the support shafts 29a and 29b can slide along the elongated holes. Further, the configuration of parts other than the parts described above can be implemented with appropriate modifications within the technical scope of the present invention.

1 is a side view showing a personal watercraft according to an embodiment of the present invention. FIG. 2 is a plan view of the personal watercraft shown in FIG. 1. It is a bottom view of the personal watercraft shown in FIG. FIG. 4 is a sectional view taken along the line 4-4 in FIG. 1. It is a perspective view which shows the state which attached the auxiliary hull to the rotating shaft. It is sectional drawing which shows the installation state of an operation cable. It is a side view which shows the raising / lowering state of an auxiliary hull. It is 8-8 sectional drawing of FIG. It is 9-9 sectional drawing of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Small planing boat, 11 ... Hull, 20a, 20b ... Recess for mounting, 21a, 21b ... Auxiliary hull, 22 ... Rotating shaft, 24a, 24b ... Connection lever, 29a, 29b, 32a, 32b ... Support shaft, 31 ... Support hole, 33 ... lever, 34 ... actuation cable, 35 ... electric control unit.

Claims (5)

  A mounting recess is formed at each boundary between the side and bottom of the rear side portion of the hull, and the auxiliary hull is attached to both mounting recesses in a state in which the position of the auxiliary hull can be changed in the vertical direction by a lifting mechanism. A small planing boat characterized in that the auxiliary hull constitutes a part of the planing surface of the hull when the is positioned downward.   2. The small size according to claim 1, wherein the mounting recess is formed from a portion on the bow side to a stern rather than a portion located on the bow side by a length of 25% of the length in the front-rear direction of the hull from the stern of the hull. Planing boat.   3. The lift mechanism according to claim 1, wherein a rotation support portion is provided at a front portion and a rear portion of the auxiliary hull, and the elevating mechanism is configured by a link mechanism that connects the auxiliary hull to the hull via the both rotation support portions. Small planing boat.   A rotation shaft extending from starboard to port is provided at the stern of the hull, and a rotation support portion at the rear of the auxiliary hull is rotatably connected to both ends of the rotation shaft via connection levers, and both ends of the rotation shaft The personal watercraft according to claim 3, wherein a rotary drive device for rotating the rotary shaft in a direction around the axis is connected therebetween. The rotation support portion provided at the front portion of the auxiliary hull is configured with an auxiliary support shaft or an auxiliary support hole having a high bow side and a low stern side, and the auxiliary support shaft has a high bow side and a low stern side. The personal watercraft according to claim 3 or 4, further comprising a support hole that is movably engaged with or a support shaft that is movably engaged with the auxiliary support hole.

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