Bearing device for a crane device

Abstract

Provide a bearing device for a crane device that can achieve both excellent lubrication effect and structural strength. 【Solution means】The bearing device 100 for a crane device includes a plastic inner sleeve tube 2 extending along the axis and an outer sleeve tube 3 into which the inner sleeve tube 2 is fitted on the inner side. The inner sleeve tube 2 has an inner tube main body portion 21 defining a tube inner space 211 and a plurality of engaging ribs 22 protruding from the outer peripheral surface 212 of the inner tube main body portion 21. The inner tube main body portion 21 has an outer diameter increasing from one end to the other end along the axial direction and an inner diameter of the same diameter. Each engaging rib 22 has a thickness in the radial direction decreasing from one end to the other end in the axial direction, and the inner tube main body portion 21 and each engaging rib 22 have the same total thickness in the radial direction in the axial direction. The outer sleeve tube 3 has an outer tube main body portion 31 defining an accommodation space 311 for fitting the inner sleeve tube 2 and an annular protruding portion 32 protruding from the outer peripheral surface of the outer tube main body portion 31.

Description

Technical Field

[0001] The present invention relates to a crane game machine, and more specifically, to a bearing device used for a crane device in a crane game machine.

Background Art

[0002] The crane device of a crane game machine is one that mounts a catcher device for grasping a prize, and is movably arranged on a guide rail, and is used to move the catcher device along the guide rail and also to move the catcher device vertically.

[0003] As a conventional crane device in a crane game machine, for example, the crane device of the crane game machine described in Patent Document 1 can be cited. Here, FIG. 1 is a perspective view showing the configuration of the crane device of the crane game machine described in Patent Document 1, and FIG. 2 is a perspective view showing the configuration of the bearing device 12 used for the crane device in the crane game machine described in Patent Document 1.

[0004] As shown in FIG. 1, the conventional crane device of a crane game machine includes a substrate 11, two bearing devices 12 that are inserted through the substrate 11 and arranged at intervals from each other, two straight rod-shaped transmission shafts 13 (only one is shown in the figure) that respectively correspond to the two bearing devices 12 and are inserted through the bearing devices 12 and can rotate with respect to the bearing devices 12, four ring bodies 14 respectively mounted on the ends of the two transmission shafts 13, two transmission gears 15 respectively mounted on the two transmission shafts 13 so as to be adjacent to any one of the two ring bodies 14 on each transmission shaft 13, a spool 16 mounted on one transmission shaft 13 and connected to a catcher device (not shown) via a wire and rotating to wind up and pay out the wire to move the catcher device vertically along the vertical direction, and two power sources 17 (only one is shown in the figure) respectively mounted on the substrate 11 to drive the two transmission gears 15.

[0005] The two ring bodies 14 mounted on both ends of each transmission shaft 13 are on opposite sides of the substrate 11 and are respectively arranged to be rollable on a pair of rails (not shown) parallel to each other in the guide rail.

[0006] The transmission shaft 13 without the spool 16, that is, the transmission shaft 13 on the left side in the figure, is connected to the axis of the corresponding ring body 14 so as not to rotate relative to each other. That is, as the ring bodies 14 roll, the transmission shaft 13 rotates.

[0007] On the other hand, the transmission shaft 13 with the spool 16 mounted thereon, that is, the transmission shaft 13 on the right side in the figure, is connected to the axis of the corresponding ring body 14 so as to be rotatable relative to each other and is connected to the axis of the spool 16 so as not to rotate relative to each other.

[0008] When the transmission gear 15 mounted on the transmission shaft 13 on the right side described above is driven by the corresponding power source 17, the corresponding transmission shaft 13 and the spool 16 can both rotate clockwise or counterclockwise. Thereby, the catcher device can be moved up and down.

[0009] When the transmission gear 15 mounted on the transmission shaft 13 on the left side described above is driven by the corresponding power source 17, the corresponding transmission shaft 13 and the two ring bodies 14 can both rotate clockwise or counterclockwise. Here, the two ring bodies 14 on the right side are rolled as the transmission shaft 13 and the two ring bodies 14 on the left side rotate. Thereby, the crane device can be moved along the guide rail.

[0010] Each bearing device 12 is generally made of a metal or plastic material and, as shown in FIGS. 1 and 2, has a pipe portion 121 disposed so as to surround the corresponding transmission shaft 13, and a protruding portion 122 integrally formed with one end of the pipe portion 121 and protruding radially from the outer surface of the pipe portion 121. In addition, it is necessary to apply lubricating oil to the inner peripheral surface of the pipe portion 121 that contacts the transmission shaft 13 so that the transmission shaft 13 can rotate more smoothly with respect to the bearing device 12.

Prior Art Documents

Patent Documents

[0011]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0012] However, when the bearing device is made of metal, the lubricating oil hardly adheres to the inner peripheral surface of the pipe portion that contacts the transmission shaft, so it is necessary to constantly add lubricating oil, which is inconvenient for the user. On the other hand, when the bearing device is made of a plastic material, there is a problem that its rigidity is low and the mechanical strength and rigidity of the bearing device are low. Therefore, there is room for improvement in the design of the bearing device used in the crane device in the conventional crane game machine.

[0013] In view of the above problems, an object of the present invention is to provide a bearing device for a crane device that can solve the above-mentioned drawbacks.

Means for Solving the Problems

[0014] To achieve the above object, the present invention is a bearing device used in a crane device in a crane game machine, comprising an inner sleeve pipe made of a plastic material and an outer sleeve pipe into which the inner sleeve pipe is fitted on the inside, The inner sleeve tube has an inner tube main body portion that extends along a predetermined axis and defines an inner tube space inside, and a plurality of engaging ribs that project radially outward at equal angular intervals from the outer peripheral surface of the inner tube main body portion in the radial direction of the axis. The inner tube main body portion has both ends in the direction of the axis, the outer diameter increases from one end to the other end along the direction of the axis, and the inner diameter is configured to be the same diameter in the direction of the axis. Each of the engaging ribs has a thickness in the radial direction of the axis, the thickness decreases from one end to the other end along the direction of the axis, and the inner tube main body portion and each of the engaging ribs have a total thickness in the radial direction of the axis, and the total thickness is the same diameter along the direction of the axis. The outer sleeve tube has both ends in the direction of the axis, extends along the axis, and has an outer tube main body portion that defines an accommodation space for accommodating the inner sleeve tube inside, and an annular protruding portion that protrudes annularly from the outer peripheral surface of the outer tube main body portion in the radial direction of the axis. The inner sleeve tube is fitted into the outer sleeve tube so as to be in the accommodation space of the outer tube main body portion, and a bearing device for a crane device is provided, which is characterized in that.

Effect of the Invention

[0015] According to the bearing device for a crane device according to the present invention, since lubricating oil easily adheres to the inner sleeve tube made of a plastic material, an excellent lubricating effect can be achieved. Further, each engaging rib serving as a reinforcing rib has good structural strength and rigidity.

[0016] Therefore, compared with the conventional one, the bearing device for a crane device according to the present invention can achieve both excellent lubricating effect and structural strength.

Brief Description of the Drawings

[0017]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0018] In order to more clearly explain the object, technical means, and advantages of the embodiments of the present invention, hereinafter, in combination with the accompanying drawings of the embodiments of the present invention, the technical means in the embodiments of the present invention will be clearly and completely described. It will be apparent that the embodiments to be described are some embodiments of the present invention and not all embodiments. Usually, the components of the embodiments of the present invention depicted and shown in the accompanying drawings can be arranged and designed in various different arrangements. Therefore, hereinafter, the detailed description of the embodiments of the present invention provided in the accompanying drawings does not constitute any limitation to the protection scope of the present invention and merely shows the selected embodiments of the present invention.

[0019] Before explaining the present invention in more detail, it should be noted that, if considered appropriate, the reference signs or the end portions of the reference signs are repeated between the figures to indicate corresponding or similar elements, and these can optionally have the same characteristics.

[0020] In the description of the present invention, terms indicating directions and positional relationships such as "up", "down", "inside", "outside", "left", "right", "front", and "rear" are based on the directions and positional relationships shown in the drawings or the directions and positional relationships habitually assumed when using the products of the present invention in order to explain more simply and clearly. They do not teach or imply that the corresponding devices or apparatuses have specific directions, structures, operations, etc. in a specific direction, and are not limitations on the present invention.

[0021] Hereinafter, the crane device in the crane game machine according to the present invention and the bearing device used therefor will be described with reference to the drawings.

[0022] With reference to FIGS. 3 to 7, the configuration of the crane device according to the present invention and the bearing device used therefor will be described. Here, FIG. 3 is a perspective view showing the configuration of the bearing device 100 for the crane device according to an embodiment of the present invention, FIG. 4 is a side sectional view showing the configuration of the bearing device 100 for the crane device according to the embodiment, FIG. 5 is a perspective view showing the configuration of the crane device 4 according to the embodiment, FIG. 6 is a perspective view showing the configuration shown in FIG. 5 from another angle, and FIG. 7 is a partial side sectional view showing the configuration of the crane device 4 and the bearing device 100 according to the embodiment.

[0023] As shown in FIGS. 3 to 6, the bearing device 100 according to the present invention is used for the crane device in the crane game machine.

[0024] As shown in FIGS. 3 and 4, the bearing device 100 in the present embodiment includes an inner sleeve tube 2 made of a plastic material and an outer sleeve tube 3 into which the inner sleeve tube 2 is fitted on the inner side.

[0025] As shown in FIG. 3, the inner sleeve tube 2 has an inner tube main body portion 21 that extends along a predetermined axis L and defines an inner tube space 211 inside, and a plurality of engaging ribs 22 that project radially outward from the outer peripheral surface 212 of the inner tube main body portion 21 at equal angular intervals in the radial direction of the axis L.

[0026] In this embodiment, as shown in FIG. 3, the number of the engagement ribs 22 is four, that is, the engagement ribs 22 are arranged at intervals along the circumferential direction at an angle of 90° to each other.

[0027] As shown in FIGS. 3 and 4, the inner tube main body portion 21 has both ends in the direction of the axis L, and the outer diameter A increases from one end to the other end along the direction of the axis L, from the left end to the right end in FIG. 4, and the inner diameter B is of the same diameter in the direction of the axis L, that is, the inner diameter B is configured to be invariant in the direction of the axis L.

[0028] More specifically, as shown in FIGS. 3 and 4, the outer contour of the inner tube main body portion 21, that is, the outer peripheral surface 212 of the inner tube main body portion 21, is formed in a frustum of a cone shape. The inner peripheral surface 213 of the inner tube of the inner tube main body portion 21 surrounds the above-described inner tube space 211, that is, the inner tube space 211 is a cylindrical through hole having the same diameter along the axis L.

[0029] As shown in FIGS. 3 and 4, each engagement rib 22 has a thickness C in the radial direction of the axis L, and the thickness C decreases from one end to the other end along the direction of the axis L, from the front end to the rear end in FIG. 3. Further, the inner tube main body portion 21 and each engagement rib 22 have a total thickness D in the radial direction of the axis L, and the total thickness D is of the same diameter in the direction of the axis L.

[0030] In this embodiment, the thickness C of each engagement rib 22 at the above-described one end (i.e., the left end) of the inner tube main body portion 21 is larger than the thickness C of each engagement rib 22 at the above-described other end (i.e., the right end) of the inner tube main body portion 21. Further, the shape of each engagement rib 22 as viewed from the side surface, that is, the shape as viewed from FIG. 4, is a right trapezoid.

[0031] The outer sleeve tube 3 is made of metal (for example, copper), and as shown in FIGS. 3 and 4, it has both ends in the direction of the axis L, extends along the axis L, and has an accommodation space 311 for accommodating the inner sleeve tube 2 inside, and includes an outer tube main body portion 31 and an annular protruding portion 32 that annularly protrudes radially outward from the axis L from the outer peripheral surface 212 of the outer tube main body portion 31.

[0032] In this embodiment, as shown in FIG. 4, the inner sleeve tube 2 is fitted into the outer sleeve tube 3 so as to be in the accommodation space 311 of the outer tube main body portion 31.

[0033] As shown in FIGS. 3 and 4, at both ends of the outer tube main body portion 31 in the direction of the axis L, there are openings that communicate with the accommodation space 311 and the outside of the outer sleeve tube 3.

[0034] As shown in FIGS. 3 and 4, the outer tube main body portion 31 has a tapered inner peripheral surface 312 that surrounds the accommodation space 311 and is formed so that the inner tube main body portion 21 can be fitted therein, and a plurality of long grooves 313 that are radially recessed at equal angular intervals outward in the radial direction of the axis L from the inner peripheral surface 312, extend along the direction of the axis L, and are respectively arranged and configured so as to be fitted by a plurality of engaging ribs 22 on the inner sleeve tube 2.

[0035] The shape of the accommodation space 311 surrounded by the inner peripheral surface 312 of the outer tube main body portion 31 corresponds to the shape of the outer peripheral surface 212 of the inner tube main body portion 21. That is, in this embodiment, the shape of the inner peripheral surface 312 of the outer tube main body portion 31 is formed in the shape of a frustum of a cone, similar to the outer peripheral surface 212 of the inner tube main body portion 21.

[0036] As shown in FIG. 3, each long groove 313 communicates with the accommodation space 311, similar to the outer tube main body portion 31, and has both ends in the direction of the axis L, and there are openings at both ends that communicate with the outside of the outer sleeve tube 3. The shape of each long groove 313 corresponds to the shape of the engaging rib 22 (that is, a right trapezoid).

[0037] In addition, in the present embodiment, the number of the long grooves 313 is four. That is, like the engaging ribs 22, the long grooves 313 are arranged at intervals along the circumferential direction of the inner peripheral surface 312 of the outer pipe main body 31 at an angle of 90° to each other.

[0038] As shown in FIGS. 5 to 7, the crane device 4 of the crane game machine according to the present embodiment includes a substrate 41, a positioning base 42 arranged at an interval from the substrate 41, and two bearing devices 100 of the above embodiment respectively inserted through the substrate 41 and the positioning base 42 and arranged at intervals from each other. Two transmission shafts 43 respectively inserted through the two bearing devices 100 corresponding to them and rotatable with respect to the bearing devices 100, four wheel bodies 44 respectively mounted on the ends of the two transmission shafts 43, and two transmission gears 45 respectively mounted on the two transmission shafts 43 so as to be adjacent to any one of the two wheel bodies 44 on each transmission shaft 43.

[0039] As shown in FIG. 7, in each bearing device 100, the inner pipe main body 21 of the inner sleeve pipe 2 surrounds the corresponding transmission shaft 43, and the outer pipe main body 31 of the outer sleeve pipe 3 abuts against the corresponding transmission gear 45, and the annular protrusion 32 of the outer sleeve pipe 3 is positioned between the substrate 41 and the positioning base 42.

[0040] Here, since the inner sleeve pipe 2 is made of a plastic material, more lubricating oil can be attached to the inner pipe inner peripheral surface 213 in contact with the transmission shaft 43 of the inner pipe main body 21. In this way, the lubrication effect can be improved, the replenishment and maintenance times of the lubricating oil can be greatly reduced, and the operation stability and smoothness can be improved.

[0041] In addition, since the outer sleeve pipe 3 is made of metal, the heat conduction of the inner sleeve pipe 2 can be promoted, and even if high temperature is generated due to the friction between the transmission shaft 43 and the inner sleeve pipe 2, it will not affect the bearing device 100 according to the present embodiment.

[0042] Furthermore, the engaging rib 22 of the inner sleeve tube 2 is arranged to be fitted into the long groove 313 of the outer sleeve tube 3. That is, since the engaging rib 22 exists as a reinforcing rib, the structural strength of the bearing device 100 according to this embodiment is high, and the crane device 4 of this embodiment can lift heavier prizes. Therefore, the bearing device 100 for the crane device 4 according to the present invention can achieve both excellent lubrication effect and structural strength compared with the conventional ones.

[0043] As shown in FIGS. 3 and 4, since the outer peripheral surface 212 of the inner tube main body 21 is formed in a frustum shape, one end with a relatively small outer diameter A of the inner tube main body 21 can be easily inserted into the accommodation space 311 of the outer tube main body 31 and positioned.

[0044] Also, after the inner sleeve tube 2 is positioned inside the outer sleeve tube 3, the inner sleeve tube 2 is restricted by the shape of the outer sleeve tube 3 and cannot move further. In this way, the bearing device 100 according to this embodiment can be assembled more quickly, and in addition, it can effectively prevent work mistakes in assembly.

[0045] In addition, in this embodiment, as shown in FIGS. 5 and 7, the substrate 41 of the crane device 4 according to this embodiment has a through hole 46 through which the transmission shaft 43 is inserted. And as shown in FIG. 7, the through hole 46 is designed such that the hole diameter corresponds to the outer diameter of the outer tube main body 31 of the outer sleeve tube 3.

[0046] With the above-described configuration, when the crane device according to this embodiment is operating, it can be ensured that the inner sleeve tube 2 does not come off from the corresponding transmission gear 45 through the through hole 46 in the substrate 41.

[0047] In summary, according to the bearing device 100 for the crane device 4 according to the present invention, since lubricating oil easily adheres to the inner sleeve tube 2 made of a plastic material, an excellent lubricating effect can be achieved. Further, the structural strength of the bearing device 100 according to the embodiment can be maintained or improved by each engaging rib 22 formed as the metal outer sleeve tube 3 and the reinforcing rib. In this way, the frequency of replenishment and maintenance of the lubricating oil can be reduced, and the stability and smoothness of the operation can be improved.

[0048] Furthermore, since the outer peripheral surface 212 of the inner tube main body portion 21 and the inner peripheral surface 312 of the outer tube main body portion 31 are formed in a frustum shape corresponding to each other, one end with a relatively small outer diameter A of the inner tube main body portion 21 can be easily inserted into the accommodation space 311 of the outer tube main body portion 31 and positioned, and can be positioned by the shape of the inner peripheral surface 312 of the outer tube main body portion 31. In this way, it is possible to effectively prevent the inner sleeve tube 2 and the outer sleeve tube 3 from separating from each other.

[0049] As in the above embodiment, the present invention can be variously modified without departing from the gist thereof.

Industrial Applicability

[0050] According to the bearing device for the crane device of the present invention, it is possible to achieve both excellent lubricating effect and structural strength. Therefore, the present invention has industrial applicability.

Explanation of Signs

[0051] 11 Substrate 12 Bearing device 121 Pipe portion 122 Protrusion 13 Transmission shaft 14 Wheel body 15 Transmission gear 16 Thread take-up reel 17 Power source 100 Bearing device 2 Inner sleeve tube 21 Inner tube main body portion 211 Inner space of the tube 212 Outer peripheral surface 213 Inner peripheral surface of the inner tube 22 Engagement rib 3 Outer sleeve tube 31 Outer tube main body part 311 Accommodation space 312 Inner peripheral surface 313 Long groove 32 Annular protrusion 4 Crane device 41 Substrate 42 Positioning base 43 Transmission shaft 44 Wheel body 45 Transmission gear 46 Through hole A Outer diameter B Inner diameter C Thickness D Total thickness L Axis

Claims

1. A bearing device used in a crane device in a crane game machine, The device includes an inner sleeve tube made of a plastic material, and an outer sleeve tube into which the inner sleeve tube is fitted, the inner sleeve pipe has an inner pipe main body portion extending along a predetermined axis and defining an inner pipe space therein, and a plurality of engagement ribs protruding radially outwardly in the radial direction of the axis from an outer circumferential surface of the inner pipe main body portion at equal angular intervals, the inner pipe main body has both ends in the axial direction, an outer diameter increases from one end to the other end along the axial direction, and an inner diameter is constant in the axial direction; Each of the engagement ribs has a thickness in a radial direction of the axis, the thickness decreasing from one end to the other end along the direction of the axis, and the inner pipe main body and each of the engagement ribs have a total thickness in the radial direction of the axis, the total thickness being the same diameter in the direction of the axis, the outer sleeve pipe has an outer pipe main body portion having both ends in the axial direction, extending along the axis, and defining an accommodation space for accommodating the inner sleeve pipe therein; and an annular protruding portion protruding annularly from the outer peripheral surface of the outer pipe main body portion radially outward in the axis direction, The inner sleeve pipe is fitted into the outer sleeve pipe so as to be in the accommodation space of the outer pipe main body portion. A bearing device for a crane apparatus, comprising:

2. The outer sleeve tube is made of metal.

2. The bearing assembly for a crane assembly according to claim 1.

3. the outer tube body has openings at both ends in the axial direction, the openings communicating with the accommodation space and the outside of the outer sleeve tube; the outer pipe main body portion has a tapered inner circumferential surface surrounding the accommodation space and configured to allow the inner pipe main body portion to be fitted therein, and a plurality of elongated grooves recessed radially outward from the inner circumferential surface at equiangular intervals in the radial direction of the axis, extending along the direction of the axis, and each of the elongated grooves is configured to be fitted therein by the plurality of engaging ribs of the inner sleeve pipe, Each of the elongated grooves is in communication with the receiving space, has two ends in the axial direction, and is configured such that the two ends have openings in communication with the outside of the outer sleeve pipe.

3. The bearing device for a crane apparatus according to claim 1 or 2.

4. The outer circumferential surface of the inner pipe body is formed in a truncated cone shape, a shape of the inner circumferential surface of the outer pipe body portion corresponds to a shape of the outer circumferential surface of the inner pipe body portion; The shape of each of the engagement ribs when viewed from the side is a right-angled trapezoid, The shape of each of the elongated grooves corresponds to the shape of the engagement rib.

4. The bearing assembly for a crane assembly according to claim 3.

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