Crane game device

Abstract

To provide a crane game device enabling easy adjustment of placing heights of prizes in a play space.SOLUTION: A crane game device comprises: a housing having an enclosed play space formed inside thereof; a prize acquisition arm movably installed in the play space; an operation part disposed outside the play space for operating the prize acquisition arm; a movable bottom plate constituting at least a part of an installation surface of an acquisition object prize in the play space and moving up and down; a drive part connected to the movable bottom plate and moving the movable bottom plate up and down; and a power supply part for supplying power to the drive part.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a crane game device in which prizes can be won by operating an arm portion. [Background technology]

[0002] A prize-winning device such as a crane game machine is a device in which a player operates an arm unit installed in a play space via an operating unit outside the play space to move prizes in a prize placement area in a closed play space to a prize drop hole and win the prizes. In this case, it is preferable that the prizes to be won are placed at an appropriate height in the play space so that they can be picked up by the arm unit, but the appropriate placement height of the prizes varies depending on the size and shape of the prizes.

[0003] For this reason, in conventional crane game devices, the height of the prize to be won is adjusted by placing a height-adjusting spacer (such as a plastic colored ball) under the prize. Also, a crane game device has been proposed that makes it possible to adjust the height of the prize by making the panel on which the prize is placed detachable or by adopting a mechanism that allows the height of the panel to be manually adjusted (see Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2006-43286 A Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention has been made in consideration of such problems, and relates to a crane game device that allows easy adjustment of the height at which prizes are placed within the play space. [Means for solving the problem]

[0006] The crane game device according to the present invention comprises: A housing part in which a closed play space is formed; A prize capture arm unit movably installed within the play space; An operation unit that is disposed outside the play space and operates the prize capture arm unit; A movable bottom plate that constitutes at least a part of the installation surface of the prize to be acquired in the play space and moves up and down; A drive unit connected to the movable bottom plate and configured to move the movable bottom plate up and down; and a power supply unit that supplies power to the drive unit.

[0007] The crane game machine according to the present invention has a movable bottom plate, a drive unit for moving the movable bottom plate up and down, and a power supply unit. By moving the movable bottom plate up and down using the power of the drive unit, the height of the installation surface in the play space can be easily changed electrically.

[0008] For example, the crane game device according to the present invention may include a plurality of guide shafts protruding downward from the movable bottom plate and extending in a substantially vertical direction; The movable bottom plate may further include a plurality of guide holes that are provided below the movable bottom plate in correspondence with the guide shafts and through which the guide shafts are inserted so as to be relatively movable, The guide hole may generate a greater frictional resistance to relative movement of the guide shaft when the inclination angle of the guide shaft with respect to the vertical direction is a second value greater than the first value, compared to when the inclination angle of the guide shaft is a first value.

[0009] In a crane game machine having such a plurality of guide shafts and guide holes, the guide shafts generate frictional resistance between the guide shafts and the guide holes, thereby preventing the movable bottom plate from tilting. Also, since the frictional resistance between the guide shafts and the guide holes changes depending on the angle of the guide shafts, the guide shafts do not impede the vertical movement of the movable bottom plate when the drive unit moves the movable bottom plate up and down.

[0010] Also, for example, the movable bottom plate may be substantially rectangular when viewed from above, The guide shafts may be provided at least at two of four corners of the movable bottom plate.

[0011] By arranging the guide shafts at the corners of the movable bottom plate, tilting of the movable bottom plate can be effectively prevented.

[0012] Also, for example, the guide hole may have a ring that contacts the guide shaft. Also, for example, the guide hole may have a swinging portion that contacts the guide shaft and is attached so as to be swingable together with the guide shaft relative to the bottom of the play space of the housing portion.

[0013] By providing the guide hole with a ring or a swinging part that comes into contact with the guide shaft, it is possible to generate an appropriate frictional resistance between the guide shaft and the ring according to the inclination of the guide shaft. The material of the contact ring of the guide hole is not particularly limited, but examples thereof include resin, metal, ceramic, etc., and resin is particularly preferable.

[0014] Also, for example, the drive unit may be an electric linear actuator having an extendable shaft whose tip is connected to the underside of the movable bottom plate, and an electric motor that transmits a driving force to the extendable shaft to extend or contract the extendable shaft.

[0015] The driving section for driving the movable bottom plate is not particularly limited, but by using an electrically conductive linear actuator with an extendable shaft and an electric motor, stable height adjustment of the movable plate can be achieved with a simple structure.

[0016] Also, for example, when viewed from above, the tip of the telescopic shaft may be connected to the movable bottom plate between the position where one of the multiple guide shafts connects to the movable bottom plate and the position where another of the multiple guide shafts connects to the movable bottom plate.

[0017] With this structure, the guide hole and the guide shaft can effectively prevent the movable bottom plate from tilting. Also, in this crane game device, when the drive unit stops the movable bottom plate from moving up and down, the guide shaft prevents the movable bottom plate from moving, and when the drive unit moves the movable bottom plate up and down, the guide shaft does not interfere with the movement of the movable bottom plate.

[0018] Also, for example, the movable bottom plate may be a transparent plate that transmits light.

[0019] Since the movable bottom plate is a transparent plate, the space below the movable bottom plate can be easily seen from the outside, and such space can be effectively used as a display area for prizes and the like. [Brief description of the drawings]

[0020] [Figure 1] FIG. 1 is an external view of a crane game device according to one embodiment of the present invention. [Diagram 2] FIG. 2 is a conceptual diagram showing a state in which the movable bottom plate is in a first position in the crane game apparatus shown in FIG. [Diagram 3] FIG. 3 is a conceptual diagram showing a state in which the movable bottom plate is in a second position in the crane game apparatus shown in FIG. [Figure 4] FIG. 4 is a conceptual diagram showing a state in which the movable bottom plate is in a third position in the crane game apparatus shown in FIG. [Diagram 5] FIG. 5 is a conceptual diagram showing the movable bottom plate, the driving portion, and the guide shaft in the crane game device shown in FIG. [Figure 6] FIG. 6 is a conceptual diagram showing an extendable shaft and an electric motor of a movable part in the crane game device shown in FIG. [Figure 7] 7 is a partial enlarged view showing the guide shaft and the guide hole of the crane game device shown in FIG. [Figure 8]FIG. 8 is a conceptual diagram showing an example of a usage state of the crane game machine shown in FIG. [Figure 9] FIG. 9 is a conceptual diagram showing a control box at the bottom of the cabinet of the crane game device shown in FIG. [Figure 10] FIG. 10 is a conceptual diagram showing the state inside the play space in the crane game machine according to the second embodiment of the present invention. [Figure 11] FIG. 11 is a conceptual diagram showing a movable bottom plate, a guide shaft, a guide hole, etc. in a crane game machine according to the third embodiment of the present invention. [Figure 12] FIG. 12 is a conceptual diagram of the guide holes and the like shown in FIG. 11 as viewed from the rear side. [Figure 13] FIG. 13 is an enlarged view showing the periphery of the guide hole shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Fig. 1 is an external view of a crane game machine 10 according to one embodiment of the present invention. As shown in Fig. 1, the crane game machine 10 has a substantially rectangular parallelepiped housing 20. A play space 21 is formed inside the housing 20 (see Fig. 2). As shown in Fig. 1, the play space 21 is closed by a transparent door 23 and a transparent side wall 24 that constitute part of the housing 20, except when prizes are replenished or maintenance is performed.

[0022] 2 to 4 are conceptual diagrams illustrating the structure of the play space 21 inside the cabinet 20 of the crane game device 10, and in these figures, the door 23 and side wall 24 of the crane game device 10 shown in Fig. 1 are omitted, and the inside of the play space 21 is shown exposed. As shown in Fig. 2, a crane 86 is movably installed in the play space 21 of the crane game device 10 as a prize capturing arm.

[0023] The crane 86 moves vertically and horizontally within the play space 21 by operating the operation unit 82 located on the front of the cabinet 20 of the crane game device 10. The crane 86 has an arm that can grasp and move a prize. By combining the opening and closing operation of the arm with movement within the play space 21, the crane 86 can grasp a prize placed within the play space 21 and move the grasped prize.

[0024] The operation unit 82 is disposed outside the play space 21, and has levers and buttons for operating a crane 86. A player of the crane game device 10 operates the levers and buttons of the operation unit 82 to operate the crane 86, aiming to win a prize placed in the prize placement area 21a in the play space 21, as shown in FIG.

[0025] The operation unit 82 can be provided at a height of, for example, about 40 to 80 cm from the surface on which the crane game device 10 is installed so that players, including children, can easily operate the buttons and levers of the operation unit 82 while standing. Note that the crane game device 10 shown in Fig. 1 is a roughly rectangular parallelepiped with a depth and width of about 120 cm and a height of about 200 cm, but the size and shape of the crane game device 10 are not particularly limited.

[0026] 2, the play space 21 of the crane game device 10 is formed in about two-thirds of the upper side of the inside of the cabinet 20, excluding about one-third of the lower side. The bottom 22 of the play space 21 has a height about the same as that of the operation unit 82, but the height of the bottom 22 of the play space 21 may be different from that of the operation unit 82.

[0027] In addition to the crane 86, the play space 21 is provided with a movable bottom plate 30, an installation extension 27, a partition plate 26, etc. The movable bottom plate 30, the installation extension plate 27, and the partition plate 26 will be described in detail later.

[0028] As shown in Fig. 2, a prize drop section 28 into which prizes moved by the crane 86 are dropped is formed in the lower front portion of the cabinet 20 of the crane game device 10 (see Fig. 5 as necessary). An upper opening of the prize drop section 28 is formed in a portion of the front side of the bottom 22 of the play space 21, and the prize drop section 28 communicates with the play space 21 via the upper opening formed in the bottom 22. When the crane 86 drops a prize it holds above the prize drop section 28, the prize moves from the play space 21 to the prize drop section 28.

[0029] The housing 20 has a prize outlet 25 formed on the front side of the housing 20 below the play space 21. A player can remove prizes that have been moved from the play space 21 to the prize drop section 28 by operating the crane 86 from the prize outlet 25. Note that, as shown in FIG. 2, a part of the upper opening of the prize drop section 28 may be blocked by an installation extension plate 27 and a partition plate 26.

[0030] 1 and 2, casters 92 are provided on the bottom 22 of the housing 20 of the crane game machine 10. The crane game machine 10 is normally fixed in place with the casters 92 locked, but the casters 92 can be unlocked as necessary to move the crane game machine 10.

[0031] As shown in Figs. 2 to 4, the crane game device 10 has a movable bottom plate 30 that constitutes at least a part of the installation surface of the prizes to be acquired in the play space 21 and moves up and down. The movable bottom plate 30 can move up and down from a position (second position P2) where the movable bottom plate 30 is farthest from the bottom 22 as shown in Fig. 3 to a position (third position P3) where the movable bottom plate 30 is closest to the bottom 22 as shown in Fig. 4. The movable bottom plate 30 can stop not only at the second position P2 shown in Fig. 3 and the third position P3 shown in Fig. 4, but also at any position between the second position P2 and the third position P3, such as the first position P1 shown in Fig. 2.

[0032] FIG. 5 is a conceptual diagram showing the movable bottom plate 30 and its surrounding structure shown in FIG. 2 to FIG. 4. As shown in FIG. 5, the movable bottom plate 30 is substantially rectangular when viewed from above, and is made of a transparent plate that transmits light. The material of the movable bottom plate 30 is not particularly limited, but examples thereof include resins such as acrylic, PET, and polycarbonate, and glass. As shown in FIG. 8, which is an example of a prize displayed in the play space 21, the movable bottom plate 30 is made of a transparent plate, so that the area from the bottom 22 of the play space 21 to the lower surface 34 of the movable bottom plate 30 can be made into the display area 21b. However, the movable bottom plate 30 is not limited to being transparent, and can also be made of an opaque plate. By making the movable bottom plate 30 opaque and also covering the side wall portion 24 of the housing unit 20, the display area 21b, which is the area below the movable bottom plate 30, can be made into a storage area that cannot be seen from outside the housing unit 20.

[0033] As shown in Fig. 5, the crane game machine 10 has a driving unit 40 that is connected to the lower surface 34 of the movable bottom plate 30 and moves the movable bottom plate 30 up and down. Fig. 6 is a conceptual diagram showing the structure of the driving unit 40. The driving unit 40 has an electric motor 44 arranged below the bottom 22 of the play space 21, and a telescopic shaft 42 whose base end is connected to the electric motor 44 and whose tip 42a is exposed to the play space 21. The telescopic shaft 42 has, for example, a gear (not shown) that transmits the driving force from the electric motor 44 and converts it into linear motion, and an outer tube and an inner tube that slide relative to each other in the up and down direction, which is the direction of motion.

[0034] As shown in Fig. 6, the tip 42a of the telescopic shaft 42 is connected to the lower surface 34 of the movable bottom plate 30. The tip 42a of the telescopic shaft 42 is fixed to the lower surface 34 of the movable bottom plate 30 via an adapter, a screw, etc., but the method of fixing the telescopic shaft 42 to the movable bottom plate 30 is not limited to the form shown in Fig. 6. The electric motor 44 transmits a driving force to the telescopic shaft 42 to extend and retract the telescopic shaft 42. As the electric motor 44, for example, a DC motor, an AC motor, a stepping motor, etc. can be used.

[0035] As shown in Fig. 6, the driving unit 40 of the crane game device 10 is an electric linear actuator having a telescopic shaft 42 and an electric motor 44, and can support the movable bottom plate 30 and move it up and down with a simple structure. That is, when the electric motor 44 rotates in a predetermined rotation direction, the inner tube slides relative to the outer tube of the telescopic shaft 42, and the overall length of the telescopic shaft 42 increases, causing the movable bottom plate 30 connected to the tip 42a to rise. Conversely, when the electric motor 44 rotates in the opposite direction to the predetermined rotation direction, the inner tube slides in the opposite direction relative to the outer tube of the telescopic shaft 42, and the overall length of the telescopic shaft 42 decreases, causing the movable bottom plate 30 connected to the tip 42a to descend.

[0036] In addition, the driving unit 40, which is an electric linear actuator, is connected to the movable bottom plate 30 from below, so it does not hinder the movement of the crane 86 shown in Fig. 2. However, the driving unit 40 that moves the movable bottom plate 30 up and down is not limited to only the electric linear actuator as shown in Fig. 6, and other methods other than the method using an electric linear actuator are also possible, such as a method in which the movable bottom plate 30 is suspended from above and wound up and down. In addition, the telescopic shaft 42 may be one in which the outer tube moves or one in which the inner tube moves.

[0037] The crane game machine 10 has a power supply unit 50 (see FIG. 9) that supplies power to the drive unit 40 that moves the movable bottom plate 30 up and down. The power supply unit 50 is not particularly limited, but may have, for example, a switching power supply (not shown) that converts commercial power, and an operation switch 52 (see FIG. 9) that switches between forward rotation, reverse rotation, and stop of the electric motor 44. The power supply unit 50 and the drive unit 40 are electrically connected by a cable or the like (not shown).

[0038] FIG. 9 is a partial enlarged view of the crane game machine 10 showing the power supply unit 50. The power supply unit 50 is housed, for example, in a lockable control box at the bottom of the housing unit 20. The manager of the crane game machine 10 operates the operation switch 52 of the power supply unit 50 to change the height of the movable bottom plate 30 in the play space 21 and change the installation height of the prize 87 to be acquired, for example, when changing the type of prize provided by the crane game machine 10. In addition, the manager of the crane game machine 10 can move the movable bottom plate 30 to change the installation height of the prize 87 to be acquired when the remaining amount of prizes to be placed in the play space 21 becomes low. The operation switch 52 that controls the power supply to the drive unit 40 may be provided in a location separate from the switching power supply in the power supply unit 50.

[0039] 4 shows a state in which the movable bottom plate 30 has moved to a position (third position P3) closest to the bottom 22. When the movable bottom plate 30 is located at the third position P3, the gap between the movable bottom plate 30 and the bottom 22 of the play space 21 is minimized. In this state, the installation surface for the target prizes, defined by the upper surface 32 of the movable bottom plate 30, is at its lowest, and the target prize installation area 21a, which is the area of ​​the play space 21 above the movable bottom plate 30, is at its widest.

[0040] The manager of the crane game machine 10 places the movable bottom plate 30 at the third position P3, for example, when the size of the target prizes 87 to be acquired by the crane 86 is relatively large, when the height of the target prizes 87 is high, or when it is desired to place more target prizes 87 in the target prize installation area 21a. Note that the bottom 22 of the play space 21 shown in Figures 2 to 4 is fixed in an unmovable state relative to the pillars and the like which are other parts of the cabinet 20.

[0041] 3 shows a state in which the movable bottom plate 30 has moved to a position (second position P2) farthest from the bottom 22. When the movable bottom plate 30 is located at the second position P2, the display area 21b formed between the movable bottom plate 30 and the bottom 22 of the play space 21 is maximized. Meanwhile, in this state, the installation surface for the target prize 87 (see FIG. 8) defined by the upper surface 32 of the movable bottom plate 30 is in the highest state, and the target prize installation area 21a of the play space 21 is in the narrowest state.

[0042] The manager of the crane game machine 10 places the movable bottom plate 30 at the second position P2, for example, when the size of the target prizes 87 to be acquired by the crane 86 is relatively small, when the height of the target prizes 87 to be acquired is low, or when it is desired to widen the exhibition area 21b to make the exhibition prizes 89 (see FIG. 8) easier to see. In particular, as shown in FIG. 8, the movable bottom plate 30 is a transparent plate, and by reducing the number of target prizes 87 to be installed on the upper surface 32 of the movable bottom plate 30, the visibility of the exhibition area 21b is improved, and a distinctive and effective presentation of the play space 21 is possible.

[0043] The movable range of the movable bottom plate 30 is expressed as (L1-L3) / L1, using the height L3 from the upper surface 32 of the movable bottom plate 30 to the ceiling of the play space 21 when the movable bottom plate 30 is in the second position P2 shown in FIG. 3 and the height L1 from the upper surface 32 of the movable bottom plate 30 to the ceiling of the play space 21 when the movable bottom plate 30 is in the third position P3 shown in FIG. 4. The movable range (L1-L3) / L1 of the movable bottom plate 30 is not particularly limited, but can be, for example, about 10% to 50%, and preferably about 15% to 45%. The crane game device 10 can flexibly and quickly respond to prizes of various sizes by making the movable range of the movable bottom plate 30 wider than a predetermined value. On the other hand, the crane game device 10 can prevent the crane 86 from contacting the upper surface 32 of the movable bottom plate 30 too strongly when descending by making the movable range smaller than a predetermined value.

[0044] As shown in FIG. 5, the crane game machine 10 has a plurality of guide shafts 60a, 60b, 60c, 60d that protrude downward from the movable bottom plate 30 and extend in a substantially vertical direction. The plurality of guide shafts 60a, 60b, 60c, 60d are preferably provided at at least two of the four corners of the movable bottom plate 30, and in the crane game machine 10, they are provided at each of the four corners 30a, 30b, 30c, 30d of the movable bottom plate 30. The guide shafts 60a, 60b, 60c, 60d can prevent the movable bottom plate 30 from tilting due to a force acting on the upper surface 32 of the movable bottom plate 30, and in addition to the mode in which the guide shafts are provided at each of the four corners 30a, 30b, 30c, 30d as shown in FIG. 5, a mode in which two guide shafts 60a, 60b are provided at the two front corners 30a, 30b can be considered.

[0045] 5, the upper ends of the guide shafts 60a, 60b, 60c, and 60d are fixed to the corners 30a, 30b, 30c, and 30d of the movable bottom plate 30 by screws or the like. Meanwhile, the lower ends of the guide shafts 60a, 60b, 60c, and 60d pass through guide holes 70a, 70b, 70c, and 70d formed in the bottom portion 22 and are positioned below the bottom portion 22.

[0046] That is, the crane game machine 10 has a plurality of guide holes 70a, 70b, 70c, and 70d provided in the bottom part 22, which is lower than the movable bottom plate 30, corresponding to the guide shafts 60a, 60b, 60c, and 60d. The guide shafts 60a, 60b, 60c, and 60d are inserted through the plurality of guide holes 70a, 70b, 70c, and 70d so as to be relatively movable.

[0047] Fig. 7 is a conceptual diagram illustrating the state around the lower end of the guide shaft 60a. As shown in Fig. 7, the guide shaft 60a is inserted through a guide hole 70a provided in the bottom 22 of the play space 21, and the lower end of the guide shaft 60a is located below the bottom 22. A stopper portion 62 that is thicker than the inner diameter of the guide hole 70a is formed at the lower end of the guide shaft 60a, preventing the lower end of the guide shaft 60a from slipping out of the guide hole 70a when the movable bottom plate 30 rises. Similar stopper portions 62 are also formed at the lower ends of the other guide shafts 60b, 60c, and 60d.

[0048] 7, guide hole 70a has a ring 72 that contacts the outer surface of guide shaft 60a through which guide shaft 60a passes. Other guide holes 70b, 70c, and 70d also have rings 72 similar to that of guide hole 70a. The material of ring 72 is not particularly limited, but examples include resin, metal, and ceramic, and a resin ring that is highly elastic, such as rubber or elastomer, is particularly preferable.

[0049] As shown in Fig. 7, guide hole 70a generates a larger frictional resistance with respect to guide shaft 60a when the inclination angle θ of guide shaft 60a with respect to the up-down direction is a first range (solid line in Fig. 7) compared to when the inclination angle θ of guide shaft 60a is a second value larger than the first value (dotted line in Fig. 7). Like guide hole 70a, guide holes 70b, 70c, and 70d also generate a larger frictional resistance with respect to guide shafts 60b, 60c, and 60d when the inclination angle θ of guide shaft 60a is large.

[0050] In the crane game machine 10 having such guide shafts 60a-60d and guide holes 70a-70d, when the driving unit 40 shown in Fig. 5 is driven to move the movable bottom plate 30, the inclination angle θ of the guide shafts 60a-60d is small, and the guide shafts 60a-60d can move smoothly through the guide holes 70a-70d. On the other hand, if the guide shafts 60a-60d try to move up and down while the driving unit 40 is stopped, the frictional resistance between the guide shafts 60a-60d and the guide holes 70a-70d increases as the inclination angle θ of the guide shafts 60a-60d increases, and the up and down movement of the guide shafts 60a-60d is restricted.

[0051] Therefore, the crane game machine 10 having the guide shafts 60a-60d and guide holes 70a-70d can effectively prevent the movable bottom plate 30 from tilting when the drive unit 40 is stopped, even though it has a simple structure with a single telescopic shaft 42. In addition, the guide shafts 60a-60d and guide holes 70a-70d have low friction resistance when the drive unit 40 is operating, and do not impede the up and down movement of the movable bottom plate 30.

[0052] 5, when viewed from above, the tip 42a of the telescopic shaft 42 of the drive unit 40 is connected to the movable bottom plate 30 between a position where the guide shaft 60c, which is one of the guide shafts 60a to 60c, is connected to the movable bottom plate 30 and a position where the guide shaft 60d, which is another of the guide shafts 60a to 60c, is connected to the movable bottom plate 30. This allows the inclination angle θ (see FIG. 7) generated in the guide shafts 60c and 60d to be approximately equal when the movable bottom plate 30 is tilted, so that the tilt of the movable bottom plate 30 can be more effectively prevented in such a crane game device 10. In addition, the lower surface connection part 34a where the tip 42a of the telescopic shaft 42 is connected to the movable bottom plate 30 is disposed between the two rear guide shafts 60c and 60d in the play space 21, so that a larger exhibit can be placed in the exhibition area 21b shown in FIG. 8.

[0053] On the other hand, as in the crane game machine 110 according to the second embodiment shown in FIG. 10, the lower surface connection part 134a where the tip of the telescopic shaft is connected to the movable bottom plate 30 may be disposed in the center of the movable bottom plate 30. In this case, the tip of the telescopic shaft is connected to the lower surface 34 of the movable bottom plate 30 between the rear guide shaft 60d in the play space 21 and the front guide shaft 60a located diagonally opposite the rear guide shaft 60d of the movable bottom plate 30 (or between the guide shafts 60b and 60b). In this crane game machine 110, when the movable bottom plate 30 is tilted, the tilt angle θ (see FIG. 7) generated in the guide shafts 60a to 60d can be made substantially uniform, so that in this crane game machine 10, the tilt of the movable bottom plate 30 can be more effectively prevented.

[0054] FIG. 11 is a conceptual diagram of the movable bottom plate 30, the driving unit 40, the guide shafts 60a to 60d, and the guide holes 270a to 270d in the crane game machine 210 according to the third embodiment, viewed from diagonally below. In FIG. 11, a part of the cabinet 20 including the play space bottom 222 constituting the bottom of the play space 21 is shown in perspective for the purpose of explanation, and the outline of the shape is shown by a virtual line (two-dot chain line). The crane game machine 210 according to the third embodiment differs from the crane game machine 110 according to the second embodiment in that the guide holes 270a to 270d are formed of a plurality of members as shown in FIG. 12 and FIG. 13, but is otherwise similar to the crane game machine 110 shown in FIG. 10. Regarding the crane game machine 210, only the differences from the crane game machine 110 will be described, and the description of the commonalities with the crane game machines 10 and 110 will be omitted.

[0055] Fig. 12 is a conceptual diagram of the guide holes 270a-270d shown in Fig. 11 as viewed from the rear side. Each of the guide holes 270a-270d of the crane game device 210 has a flanged sleeve 273 as a swinging member in addition to a through hole formed in the play space bottom 222. The flanged sleeve 273 is in contact with the guide shafts 60a-60d and is swingably attached to the play space bottom 222 of the cabinet together with the guide shafts 60a-60d by using an attachment plate 275.

[0056] Fig. 13 is an enlarged view showing the surrounding area of ​​the guide hole 270d shown in Fig. 11 and Fig. 12. As shown in Fig. 13, the flanged sleeve 273 of the guide hole 270d has a disk-shaped flange portion 273a and a tubular portion 273b protruding downward from the flange portion 273a. The flanged sleeve 273 is attached to the underside of the play space bottom 222 using a mounting plate 275 having a through hole with a diameter smaller than that of the flange portion 273a and through which the tubular portion 273b can be inserted.

[0057] The flange portion 273a of the flanged sleeve 273 is sandwiched vertically between the play space bottom 222 and the mounting plate 275 and is held between the play space bottom 222 and the mounting plate 275. The width of the gap formed between the play space bottom 222 and the mounting plate 275 is slightly wider than the thickness of the flange portion 273a, and the flanged sleeve 273 is held swingably by the play space bottom 222 and the mounting plate 275 so as to be allowed to tilt as shown by the dotted line in FIG.

[0058] A through hole 273c through which the guide shaft 60d shown in Figures 11 and 12 is inserted is formed in the center of the flanged sleeve 273. The through hole 273c may be provided with a resin ring or the like for adjusting the frictional resistance with the guide shaft 60d. The other guide holes 270a to 270c also have flanged sleeves 273 similar to the guide hole 270d shown in Figure 13.

[0059] 11 to 13, even if the movable bottom plate 30 is tilted, if the accompanying tilt of the guide shafts 60a to 60d is a small tilt (first value) that can be absorbed by the swinging of the flanged sleeves 273 of the guide holes 270a to 270d, there is almost no change in the frictional resistance between the guide holes 270a to 270d and the guide shafts 60a to 60d. However, if the movable bottom plate 30 and the guide shafts 60a to 60d are tilted (second value) beyond the swingable range of the flanged sleeves 273, the change in the frictional resistance between the flanged sleeves 273 and the guide shafts 60a to 60d increases rapidly.

[0060] In the crane game machine 210 having such guide holes 270a-270d, when the driving unit 40 is driven to move the movable bottom plate 30, the inclination angle θ of the guide shafts 60a-60d is small, and the guide shafts 60a-60d can move smoothly through the guide holes 270a-270d. On the other hand, when the driving unit 40 is stopped and the guide shafts 60a-60d try to move up and down, the inclination angle θ of the guide shafts 60a-60d becomes large beyond the swingable range of the flanged sleeve 273, and the frictional resistance between the guide shafts 60a-60d and the guide holes 270a-270d becomes suddenly large, restricting the up and down movement of the guide shafts 60a-60d.

[0061] In this way, the crane game machines 10, 110, 210 can easily electrically change the height of the installation surface of the target prizes 87 in the play space 21 by moving the movable bottom plate 30 up and down with the power of the drive unit 40. Therefore, the crane game machines 10, 110, 210 can easily and quickly change the height of the installation surface of the target prizes 87 depending on the size of the target prizes 87 and the number of target prizes 87 installed. In addition, the area below the installation surface of the target prizes 87 defined by the movable bottom plate 30 can be effectively used as the display area 21b, and the volume (height) can also be easily changed.

[0062] Although the present invention has been described above with reference to the embodiments, the technical scope of the present invention is not limited to the above-mentioned embodiments, and it goes without saying that it includes many other embodiments and modifications. For example, the area of ​​the prize installation surface that can be moved up and down, including the movable bottom plate 30 and the installation extension plate 27 that moves together with the movable bottom plate 30, is preferably 50% or more of the projected area of ​​the play space 21, and more preferably 60% or more, but an embodiment in which the area of ​​the prize installation surface that can be moved up and down is less than 50% is also possible. In addition, the movable bottom plate 30 may be supported from below by a plurality of drive units 40 and a plurality of telescopic shafts 42 so that it can be moved up and down, and the number of actuators that drive the movable bottom plate 30 may be one or more.

[0063] In addition, the guide shafts 60a-60d are not limited to being disposed at the corners 30a-30b of the movable bottom plate 30, and can be attached at any position on the movable bottom plate 30. For example, in addition to the arrangements shown in Fig. 5 and Fig. 10, it is also possible to arrange the guide shafts so that, as viewed from above, the triangles connecting each guide shaft with the connection position between the movable bottom plate and the drive unit form an isosceles triangle. It is also possible to arrange the guide shafts so that, as viewed from above, the guide shafts are arranged on a circumference centered on the connection position between the movable bottom plate and the drive unit. [Explanation of symbols]

[0064] 10, 110, 210...Crane game device 20…Housing section 21. Play space 21a…Area where prizes are available 21b…Exhibition area 22, 222…Bottom 23…Door section 24…Side wall 25…Prize outlet 26…Partition plate 27…Installation extension board 28…Prize drop section 30…Movable bottom plate 32…Top surface 34…Bottom surface 34a, 134a…Bottom connection part 30a, 30b, 30c, 30d... corner 40...Drive unit 42...Telescopic shaft 42a…Tip 44…Electric motor 50…Power supply section 52...Operation switch 60a, 60b, 60c, 60d...Guide shaft 62…Stopper part θ…Inclination angle 70a, 70b, 70c, 70d, 270a, 270b, 270c, 270d...Guide hole 72...Resin ring 86…Crane (prize-grabbing arm) 82...Operation unit 87…Eligible prizes 89…Exhibition prizes 273…Flanged sleeve 273a…Flange section 273b…Cylindrical section 273c…Through hole 275…Mounting plate

Claims

1. A housing part in which a closed play space is formed; A prize capture arm unit movably installed within the play space; An operation unit that is disposed outside the play space and operates the prize capture arm unit; A movable bottom plate that constitutes at least a part of the installation surface of the prize to be acquired in the play space and moves up and down; A drive unit connected to the movable bottom plate and configured to move the movable bottom plate up and down; a power supply unit that supplies power to the drive unit; A crane game device having the above structure.

2. A plurality of guide shafts protruding downward from the movable bottom plate and extending in a substantially vertical direction; a plurality of guide holes provided below the movable bottom plate in correspondence with the guide shafts and through which the guide shafts are inserted so as to be relatively movable; The crane game device of claim 1, wherein the guide hole generates a greater frictional resistance against the guide shaft when the inclination angle of the guide shaft with respect to the vertical direction is a second value greater than the first value, compared to when the inclination angle of the guide shaft with respect to the vertical direction is a first value.

3. The movable bottom plate is generally rectangular when viewed from above.

3. The crane game device according to claim 2, wherein the plurality of guide shafts are provided at at least two of the four corners of the movable bottom plate.

4. 4. The crane game device according to claim 2, wherein the guide hole has a ring that comes into contact with the guide shaft.

5. 4. The crane game device according to claim 2, wherein the guide hole has a swinging portion that comes into contact with the guide shaft and is attached to be swingable together with the guide shaft relative to the bottom of the play space of the cabinet.

6. The crane game device according to claim 1 or 2, wherein the drive unit is an electric linear actuator having an extendable shaft whose tip is connected to the underside of the movable base plate, and an electric motor that transmits a driving force to the extendable shaft to extend or contract the extendable shaft.

7. A crane game device as described in claim 6, which quotes claim 2, in which, when viewed from above, the tip of the telescopic shaft is connected to the movable bottom plate between the position where one of the multiple guide shafts connects to the movable bottom plate and the position where another of the multiple guide shafts connects to the movable bottom plate.

8. 2. The crane game machine according to claim 1, wherein the movable bottom plate is a transparent plate that transmits light.

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