JPH0440700Y2 - - Google Patents

Description

[Detailed explanation of the idea]

[Field of Industrial Application] The present invention relates to a top plate opening/closing device for opening and closing the top plate covering the top surface of an automatic mahjong table in which a drive mechanism is housed.

[Conventional technology]

It is possible to automatically perform the operations of mixing tiles, turning the mixed tiles face down to form two stacks of castle wall tiles, and transferring the castle wall tiles onto the top board (table board). Automatic mahjong tables are well known, and have a drive mechanism built into the tabletop for performing the above-mentioned operations in series. by the way,
The drive mechanism described above has a relatively large number of electrical parts and has a complicated structure, and its inspection and repair are performed by opening the top plate that covers the top surface of the tabletop. The conventional opening/closing device for the top plate connects the top plate 1 and the table stand 2 through first and second links 3 and 4, which are formed into a substantially T-shape, as shown in FIGS. 4 and 5. The top plate 1 can be rotated so as to stand almost upright on the side wall 5 of the table stand 2, and the top surface of the table stand can be completely opened. Thus, one end 3a of the first link 3 is fixed to a support plate 6 vertically disposed on the back surface of the top plate 1, and one end 4a of the second link 4 is fixed to the tabletop 2 along the inner wall surface of the side wall 5. The first link 3 is pivoted at 9 and 11 to support plates 8 provided on a fixed frame 7, respectively, and the nine pivot points of the first link 3 are close to the inner lower edge of the edge material 12 forming the outer periphery of the top plate 1. The 11 pivot points of the second link 4 are located at the portion facing the inner edge of the upper surface 5a of the side wall portion 5. The other end 3b of the first link 3 is inserted into the first guide slot 13 provided on the support plate 8 on the side wall 5 side, and the other end 4b of the second link 4 is provided on the support plate 6 on the top plate 1 side. Sliding pins 15 in the second guide slots 14, respectively.
The first guide slot 13 on the support plate 8 is an inclined hole whose lower part is inclined toward the side wall part 5, and the upper part of the inclined hole is supported by the side wall part 5. The second guide elongated hole 14 on the support plate 6 is an inclined hole whose inner end portion is inclined toward the top plate 1. A portion extending parallel to the plate 1 is formed into a horizontal hole, and the first link 3
A leg rod 3c and a leg rod 4c, which are respectively protruded from approximately the center of the second link 4, are pivotally connected 17 to each other.

[Problem that the invention attempts to solve]

As in the above conventional device, the starting end portions of the first and second guide slots 13 and 14, on which the sliding pins 15 and 16 start sliding when opening the top plate 1, are aligned with the vertical line and the horizontal line. If it is tilted, the first link 3
starts sliding along the first guide elongated hole 13, and at the same time the top plate 1 also rotates using the 11 pivot points of the second link 4 as a fulcrum. The lower edge 12a hits the upper surface 5a of the side wall portion 5, and the top plate 1 can no longer be rotated. For this reason, when the top plate 1 is closed, the top plate 1 is supported by forming a gap 〓a between the upper surface 5a of the side wall portion 5 and the lower surface of the edge material 12 in advance, as shown in FIG. During this period, noise from the drive mechanism may leak to the outside, dust may enter the drive mechanism and the noise may cause discomfort to the game player, or the drive mechanism may be disrupted by the dust that has entered. There is a problem. In addition, if an excessive load is applied to the pivoting portion of the top plate 1, there is a risk that the link mechanism, which is the pivoting member, may be destroyed.

[Means to solve the problem]

The present invention was made to solve the above problem, and the purpose is to improve the rim material forming the outer periphery of the tabletop so that it can come into contact with the upper surface of the side wall of the tabletop when the tabletop is closed. The purpose of the present invention is to provide an automatic mahjong table top opening/closing device. Therefore, the above-mentioned object of the present invention is to provide a first link having one end pivotally connected to a support plate provided vertically on the back side of the tabletop, and a first link having one end pivotally connected to a support plate provided on the inner wall surface of the side wall of the tabletop. 2 links, the leg rods protruding from the center portions of the first link and the second link are pivotally connected to each other, and the other end of the first link is provided on the support plate on the inner wall surface side. In the top plate opening/closing device of an automatic mahjong table, the top plate opening/closing device of an automatic mahjong table is provided in which the other end of the second link is slidably supported in a second guide slot provided in the support plate on the top plate side. The hole has a length of approximately 2/3 of the length of the first guide elongated hole, and has an inclined hole portion that extends in a direction gradually separating from the inner wall surface of the table side wall portion, and a first guide elongated hole. a vertical hole having a length of approximately 1/3 of the length of the inclined hole and extending downward along a vertical line from the lower end of the inclined hole; an inclined hole portion having a length of approximately 2/3 of the length of the second guide slot and extending in a direction that gradually separates from the back surface of the top plate 1; /3 length and a horizontal hole extending along the horizontal line from the high end of the inclined hole,
This is achieved by an automatic mahjong table top opening/closing device configured so that the edge material forming the periphery of the top plate can come into contact with the upper surface of the side wall of the table stand when the top plate is closed.

【Example】

In the conventional apparatus shown in FIGS. 4 and 5, the present invention is such that the top plate is held horizontally and rises at the initial stage when the first link and the second link start to operate, and then the top plate is raised in the horizontal state. The shapes of the first and second guide slots are specified so that the top plate can rotate around the pivot point, and when the top plate is closed, the edge material forming the periphery of the top plate is It is configured so that it can come into contact with the upper surface of the side wall of the stand. Therefore,
In the following description of the embodiment of the present invention shown in FIGS. 1 to 3, the same reference numerals will be used for components equivalent to those shown in FIGS. Omitted. 1 to 3, the first guide slot 21 for guiding the other end 3b of the first link 3 has a length of approximately 2/3 of the length of the first guide slot 21, and has a side wall. An inclined hole portion 21a that extends at an angle in a direction that gradually separates from the inner wall surface of the portion 5, and a first guide elongated hole 21.
The length of the inclined hole 2 is approximately 1/3 of the length of the slanted hole 2.
It is formed by communicating with a vertical hole 21b extending downward along a vertical line from the lower end of the second hole 1a.
Second guide slot 22 for guiding the other end 4b of the link 4
is approximately 2/3 of the length of the second guide elongated hole 22 and extends obliquely in a direction gradually separating from the back surface of the top plate 1;
2 and extending along the horizontal line from the high end of the inclined hole 22a,
The lengths of the inclined holes 21a and 22a, and the lengths of the vertical holes 21b and horizontal holes 22b are the same. According to the above configuration, the other end 3b of the first link 3
When the sliding pin 15 provided in 22b and the sliding pin 16 provided at the other end of the second link 4 slides, so that the top plate 1 is supported in a horizontal state without rotating and floats as shown in FIG. 2A. rise to In this case, the top plate 1 moves slightly horizontally toward the left in the top of FIG. 2A. Next, when the sliding pin 15 of the first link 3 slides while being guided by the inclined hole part 21a of the first guide elongated hole 21, the sliding pin 16 of the second link 4 slides into the inclined hole part 21a of the second guide elongated hole 22. As a result, the top plate 1 slides while being guided by the portion 22a, as shown in FIG.
It begins to rotate using the 11 pivot points of link 4 as a fulcrum,
The top plate 1 is opened and finally rotated to a state along a vertical line and then stopped. To close the top plate 1, the sliding pin 15 of the first link 3 should be slid toward the vertical hole 21b side of the first guide elongated hole 21, and when the top plate 1 is closed, the peripheral edge of the top plate 1 The edge material 12 forming the rim abuts against the upper surface 5a of the side wall portion 5.

[Effect of the idea]

In the present invention, as described above, in the initial stage of opening the top plate, the top plate is held in a horizontal state and raised, so that during the subsequent rotation operation, the edge material forming the periphery of the top plate is The top plate can be opened smoothly without worrying about hitting the top surface of the unit. In addition, when the top plate is closed, the edge material comes into contact with the top surface of the side wall and the top plate 1
Since it can be supported on the side wall, there is no need to worry about the opening/closing mechanism being destroyed even if an excessive load is applied to the top plate 1, and the noise from the drive mechanism housed inside the tabletop is also reduced. This has the effect of completely eliminating inconveniences such as leakage to the outside or intrusion of dust into the drive mechanism.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the present invention, in which Figure 1 is a half sectional view when the top plate is closed, Figures 2 A, B, and 3 show the top plate in the open state. FIG. 4 is a half sectional view of the conventional device when the top plate is closed, and FIG. be. In the figure, 1 is the top plate, 2 is the tabletop, 3 is the first link,
3a is one end, 3b is the other end, 3c is the leg lever, 4 is the second
Link, 4a is one end, 4b is the other end, 4c is the leg lever,
5 is a side wall portion, 5a is a top surface, 6 and 8 are support plates, 9,
11 is a pivot joint part, 12 is a rim material, 17 is a pivot joint part,
21 is the first guide long hole, 21a is the inclined hole portion, 21b
22 is a vertical hole, 22 is a second guide slot, 22a is an inclined hole, and 22b is a horizontal hole.

Claims (1)

[Scope of utility model registration request] A first link having one end pivotally connected to a support plate provided vertically on the back surface of the tabletop, and a second link having one end pivotally connected to a support plate provided on the inner wall surface side of the table side wall.
The leg rods protruding from the center portions of the link and the second link are pivotally connected to each other, and the other end of the first link is connected to the first guide slot provided in the support plate on the inner wall side, and the second
A second link with the other end of the link provided on the support plate on the top plate side.
In an automatic mahjong table top opening/closing device that is slidably supported in each of the guide slots, the first guide slot has a length of approximately 2/3 of the length of the first guide slot, and the table base a slanted hole extending in a direction that gradually separates from the inner wall surface of the side wall; The second guide elongated hole has a length of approximately 2/3 of the length of the second guide elongated hole and is formed on the back surface of the top plate 1. a slanted hole extending in a direction that gradually separates from the other; and a slanted hole having a length of approximately 1/3 of the length of the second guide slot and extending along a horizontal line from a high end of the slanted hole. An automatic mahjong table top plate opening/closing device characterized in that a rim material formed by a horizontal hole and forming a periphery of the top plate is brought into contact with the top surface of the table side wall when the top plate is closed. Device.