JPH0441897Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

The present invention relates to a lifting platform device for an automatic mahjong table that lifts castle wall tiles assembled by an automatic tile assembly mechanism onto a table surface.

[Conventional technology]

As shown in Fig. 1, the automatic mahjong table elevating table device is equipped with elevating plates 2 that lift assembled castle wall tiles onto the table surface at each position in the north, south, east, west, and east of the mahjong table 1. 2 adjacent ones are connected to each other by an actuating plate 3, and a guide shaft 4
A structure is known in which the respective elevating plates 2 can be raised and lowered simultaneously by synchronous elevating and lowering operations of the respective actuating plates 3, which are attached to the movable member so as to be able to rise and fall freely. Each of the actuating plates 3 is horizontally raised and lowered by the rotational movement of a rotating arm connected to a rotating cam that is integrally connected to the sprocket wheel 5. , a cam, and a rotating arm are assembled to each of the actuating plates 3, and each sprocket wheel 5 is simultaneously rotated by a chain 7 whose tension is adjusted by a tension wheel 6. Let's do it.

[Problem that the invention attempts to solve]

The cams that operate each rotating arm must all rotate in the same phase, and when each cam rotates in the same phase, each rotating arm also rotates in the same phase, and the cams that operate each rotating arm must rotate in the same phase, and the cams that operate each rotating arm must rotate in the same phase. Each lifting plate 2 can be held horizontally and raised and lowered, but if
When the tension of the chain 7 becomes unstable and becomes unbalanced with respect to each sprocket wheel 5, a phase shift occurs between the cams when they rotate, and a shift occurs in the rotation of each rotating arm, causing each elevating plate to 2 cannot be held horizontally and raised or lowered. If a large phase shift occurs, the operating member will be destroyed. To correct this phase shift, it is necessary to perform adjustment work to equalize the tension of the chain 7 with respect to each sprocket wheel 5, and at the same time, perform alignment work to make the phases of each cam the same. Since they are interlocked via the chain 7, the correction work is very troublesome and requires considerable skill.

[Means to solve the problem]

The present invention was made to solve the above problem, and its purpose is to connect a cam that operates a rotating arm and a sprocket wheel that drives the cam so that the relative phase of the two can be adjusted. death,
To provide a lifting platform device for an automatic mahjong table that is improved so that when a phase shift occurs between cams, the phase shift can be easily corrected on the cam side regardless of the chain side. be. However,
The above-mentioned purpose of the present invention is to arrange elevating plates at each position in the north, south, east, and west, and to connect adjacent elevating plates to each other by actuating plates that can be raised and lowered, so that each actuating plate can be rotated. In an automatic mahjong table elevating platform device, each of which is held by an arm, each of the rotating arms is associated with a cam, and these cams are driven by a sprocket wheel provided coaxially with the cam. This is achieved by an automatic mahjong table elevating platform device which is provided with an adjustment plate between the cam and the sprocket wheel that can adjust the relative phase of the cam and sprocket wheel when they are combined. .

【Example】

Embodiments of the present invention will be described below with reference to the accompanying drawings. In FIGS. 2 to 4, adjacent elevating plates 11 arranged in north, south, east, and west positions are connected to each other by actuating plates 12, and one end of the actuating plates 12 is connected to the base 13. A sprocket wheel 15 and a cam 16 are rotatably attached to the guide shaft 14.
The structure in which the rotating arm 17 is rotated by a predetermined angle in the vertical direction by the rotation of 6, and each elevating plate 11 is held horizontally and raised and lowered is the same as that of the conventional device described above. The arm 17 is pivoted 19 to a supporting frame 18 with a bisected structure mounted on the base 13.
The free end 17a is in contact with the lower surface of the actuating plate 12 to hold the actuating plate 12, and a roller 21 is attached to the free end 17a. Also,
A rotator 17b protruding from the pivot 19 side of the rotary arm 17 is always engaged with a sliding piece 22 that is slidably attached to the support frame 18, and the sliding piece 22 slides in the vertical direction. By moving, the rotating arm 17 rotates. The sliding piece 22 is provided with an engagement hole 22a into which the rotor 17b engages. On the other hand, a cam groove 16a is provided on the circumferential surface of the cylindrical cam 16, and a roller 23 attached to the lower end of the sliding piece 22 is fitted into this cam groove 16a. Therefore, the sliding piece 22 slides. In the above configuration, the present invention provides an adjustment plate between the sprocket wheel 15 and the cam 16 that can adjust the relative phase when the two are coupled, and this adjustment plate allows the adjustment plate to adjust the relative phase between the sprocket wheels 15 and the cams 16. This makes it possible to correct the phase shift. That is,
In the illustrated embodiment, two adjustment plates 24, 25
is rotatably inserted into the guide shaft 14, and the first adjusting plate 24 is fixed onto the sprocket wheel 15 by means such as screws 20, and the first adjusting plate 24 and the cam 16 are connected to each other. The second adjustment plate 25 is provided between the upper surface of the first adjustment plate 24, the upper and lower surfaces of the second adjustment plate 25, and the cam 16.
A plurality of engagement protrusions 24a, 25a and 25b, 16b are provided on the lower surface portion, corresponding to each other along the same circumference. The rotating arm 17 is rotated by transmitting the rotation of the sprocket wheel 15 to the cam 16. According to this mechanism, when a phase shift occurs between each cam 16, the first and second adjustment plates 2
4, 25 and the second adjusting plate 25 and the cam 16, and the first adjusting plate 24 and the second adjusting plate 25 are loosened so that all of the cams 16 are placed under the same phase. the relative phase between and the second adjusting plate 25
The relative phase between the cam 16 and the corresponding sets of engagement protrusions 24a, 25a and 25b, 1
It is only necessary to make adjustments by adjusting the meshing of the parts 6b, and the phase correction can be finely adjusted in two stages. The present invention can basically be implemented by connecting the sprocket wheel 15 and the cam 16 with a single adjusting plate so that the relative phase of both members can be adjusted. In the figure, 26 is a guide frame attached to the lower surface of the actuating plate 12, and 27 is a holding spring.

[Effect of the idea]

The present invention is as described above, and employs a configuration in which an adjustment plate is provided between the sprocket wheel and the cam to adjust the relative phase when the two are coupled, so that the phase that occurs between each cam can be adjusted. There is a work advantage in that misalignment can be easily corrected on the cam side regardless of the tension on the chain side, and correction work can be done easily, quickly and correctly by eliminating individual differences, and each lifting plate can be maintained in a horizontal position. It is possible to move it up and down, and its practical value is extremely great.

[Brief explanation of the drawing]

Fig. 1 is a schematic plan view of the elevating platform device part shown to explain the conventional device, Fig. 2 is a side sectional view showing an embodiment of the present invention, Fig. 3 is a side sectional view of the main part of the same, Fig. 4 FIG. 2 is a side sectional view showing one side of the adjustment plate. In the figure, 11 is a lifting plate, 12 is an operating plate, 14 is a guide shaft, 15 is a sprocket wheel, 16 is a cam, 17 is a rotating arm, 24 is an adjustment plate (first adjustment plate), and 25 is an adjustment plate. (second adjustment plate), 16b,
24a, 25a, and 25b are engagement protrusions.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Lifting plates are arranged in each position in the north, south, east, west, and the like, and adjacent lifting plates are connected to each other by an operating plate that can be raised and lowered, and each operation An automatic mahjong table in which the boards are each held by rotating arms, each of the rotating arms is associated with a cam, and these cams are driven by a sprocket wheel provided coaxially with the cam. An automatic mahjong table characterized in that, in the elevating platform device, an adjustment plate is provided between the cam and the sprocket wheel, which can adjust the relative phase of the two when the cam and the sprocket wheel are combined. Lifting platform device. (2) The adjustment plate consists of a first adjustment plate and a second adjustment plate, the first adjustment plate is fixed on the sprocket wheel, and the first adjustment plate and the second adjustment plate are connected to each other, Further, the automatic vehicle according to claim (1) of claim 1, wherein the second adjustment plate and the cam are respectively connected by engaging protrusions provided on these members. Mahjong table elevating platform device.