JPH0520400Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is an automatic mahjong table in which mahjong tiles, which are delivered from a tile supply source in a fixed posture, are placed on four edges of the table. This invention relates to a conveyor belt tensioning device in a mahjong tile conveyor for conveying mahjong tiles to a position adjacent to each lowered position of four elevating platforms which are vertically and vertically mounted on a machine frame in correspondence with each other.

[Prior Art] More specifically, the automatic mahjong table targeted by the present invention has a machine frame 2 in the form of a flat box that supports a mahjong table 1, as shown in FIGS. Four elevating tables 3... are arranged so as to form a substantially quadrilateral in plan view and are supported so as to be able to rise and fall freely, and at the outer positions of the elevating tables 3... A guideway 4 in the shape of a substantially square enclosing frame is installed with an open part w formed at one corner in a plan view, and an endless guideway 4 is provided near the guideway 4 along the guideway 4. A conveyor belt 5 that rotates in the direction of rotation is stretched and supported on the machine frame 2, and the conveyor belt 5 has a plurality of tile pushing members 50 that protrude into the guiding path 4 in the rotation direction of the conveyor belt 5. The entrance of the guideway 4 is installed at a predetermined interval at a predetermined interval, and is sent out by a conveyor 60 from a tile supply section z installed in the center of the machine frame 2 and faces the opening section w by a pushing device 61. The automatic mahjong table is configured such that mahjong tiles pushed into the guideway 4 from y are conveyed through the guideway 4 by the tile pushing member 50, which is moved by the drive of the conveyor belt 5. be.

The present invention relates to an improvement of the conveyor belt tensioning device for keeping the conveyor belt 5 of the automatic mahjong tile conveyor at a predetermined tension level in this type of automatic mahjong table conveyor.

[Problem to be solved by the invention] This type of automatic mahjong table conveying device for mahjong tiles is
A conveyor belt 5 for driving a tile extrusion member 50 facing inside the guide path 4 is placed near the guide path 4 which is formed in a substantially rectangular frame shape as shown in FIG. Therefore, a tensioning mechanism for tensioning the endlessly rotating conveyor belt 5 to a predetermined tension is installed near the guideway 4. There was a problem in that it was difficult to perform a predetermined adjustment operation because it was obstructed by other mechanisms such as the guideway 4.

The object of the present invention is to provide a new means to solve this problem and allow the adjustment operation of the tension mechanism for tensioning the conveyor belt 5 to be easily performed without being obstructed by the guide path 4.

[Means for Solving the Problem] In the present invention, as a means for achieving this purpose, four lifting platforms 3 are installed in a flat box-shaped machine frame 2 that supports the mahjong table 1. They are arranged so as to form a substantially quadrilateral shape when viewed, and are supported so as to be able to rise and fall freely, and at positions outside of these lifting tables 3...
A guideway 4 in the shape of a substantially square enclosing frame is installed along the outer edge of the elevator platform 3 with an open portion w formed at one corner of the guideway 4 in plan view.
A conveyor belt 5 that rotates endlessly along the guideway 4 is stretched and supported by the machine frame 2 near the guideway 4, and the conveyor belt 5 has a plurality of tile extrusions that protrude into the guideway 4. In a mahjong tile conveyance device for an automatic mahjong table in which members 50 are attached at predetermined intervals in the rotating direction of the conveyor belt 5, the tension ring c of the conveyor belt 5 is connected to the square enclosing frame shape. The automatic conveyor belt 5 is disposed in the open part w of the guideway 4, is supported on the machine frame 2 so as to be movable in the tensioning direction, and is biased by a spring g so as to be pushed out in the tensioning direction. This invention proposes a conveyor belt tensioning device in a mahjong tile conveyor at a mahjong table.

[Example] Next, an example of implementation will be described in detail with reference to the drawings. In addition,
The same reference numerals in the drawings as in the previous means shall be used for constituent members having the same effect.

FIG. 3 is a perspective view showing the overall outline of an automatic mahjong table A that can implement the present invention, in which 2 is a machine frame formed in the shape of a square flat box, and 1 is an opening on the top side of the machine frame 2, which can be opened and closed. A mahjong table formed on a top plate with a lid, 10
12 is a mahjong tile drop opening opened in the center of the mahjong table 1 and closed by an opening/closing lid 11, and 12 is a window hole provided at the periphery of the mahjong table 1 for allowing the four elevating tables 3 to appear and disappear. It shows.

Next, FIG. 4 is a plan view of the mahjong tile aligning device installed in the machine frame 2, and shows the slot 1 of the mahjong table 1 described above.
A tile washing hopper that receives tiles dropped from 0 and a tile supplying section z that arranges the mahjong tiles in the tile washing hopper in a fixed posture and sequentially sends them out by a conveyor are shown as omitted by dashed lines. In the same figure,
3... are the four window holes 12 opened in the aforementioned mahjong table 1.
4 is a guideway in the form of a substantially rectangular enclosure frame arranged outside the four elevators 3..., w is an open part provided at one corner of the guideway 4, 5 shows an endless conveyor belt (chain belt) stretched below the guideway 4.

The four lifting tables 3 are each connected by four connecting blocks 30 each having an L-shape in a plan view and arranged at four inner corners of a rectangular frame-like shape surrounded by the four lifting tables 3. Both longitudinal ends of the elevating table 3 are connected to both longitudinal ends of each adjoining elevating table 3, so that the four elevating tables 3 are assembled into an enclosing frame shape that is integrally connected. Then, each connected block 30...
These connecting blocks are fitted in such a way that they can be raised and lowered, respectively, to pillars 31 arranged at the aforementioned inner corners and raised from the base plate 20 of the machine frame 2 (Fig. 5). 30... are guided by the pillars 31... to move up and down, so that the four lifting platforms 3... move up and down in synchrony.

The guideway 4 includes four waiting tables 4a that are arranged in parallel adjacent to each outer position of the four lifting tables 3.
and a connecting member 4b that connects the ends of the waiting tables 4a in an arc shape to form an enclosing frame shape surrounding the elevator platform 3. By removing the connecting member 4b, the corner thereof is formed into an open portion w. A bottom plate 40 of the guideway 4 is formed by the upper surface of the standby platform 4a and the upper surface of the connecting member 4b, and the bottom plate 40 is used for lifting and lowering when the lifting table 3 is located at the lower limit of the lowering operation. A cleavage 40a located at the same height as the table surface of the table 3 and extending along the longitudinal direction (conveying direction) at the middle part in the width direction.
is formed (Figure 5). Further, the connecting member 4b is attached to the machine frame 2 as shown in FIGS. 6 and 7.
Support members 42, 4 provided on the base plate 20 of
3 and is detachably assembled and supported by screws 44.

a... is a guide rail, as shown in FIG. 4, which is formed into a fan shape obtained by dividing a disc into four parts, and is placed below the above-mentioned connecting member 4b, as shown in FIGS. As shown in the figure, the connecting member 4
It is fixedly supported on the machine frame 2 by the support member 43 that supports b.

Reference numeral c denotes a tension ring made of a sprocket gear disposed at a portion facing the opening w of the guideway 4, and is rotatably supported on the tip of the tension arm b. , the base end of which is rotatably supported on a spindle e of a drive wheel d made of a sprocket gear arranged adjacent to the tension wheel c and pivotally supported on the machine frame 2; It rotates freely around the support shaft e (Fig. 8). and the driving wheel d
A spring g stretched between the motor M that drives the motor M and the mounting frame f urges the motor M to rotate counterclockwise about the support shaft e in FIG. Further, the lower end side of the boss portion of the drive wheel d is
It is integrally connected to a transmission gear h that is pivotally supported on the bottom of the support shaft e, and the transmission gear h meshes with the transmission gear i provided on the output shaft of the motor M and rotates. , is driven and rotated counterclockwise about the support shaft e in FIG.

Thus, the aforementioned conveyor belt 5 (chain belt) is endlessly looped around the tension wheels c, drive wheels d, and the aforementioned guide rails a, as shown in FIG. 3. This conveyor belt 5 is provided with an upper end portion 5 within the guiding path 4 as shown in FIG.
Three tile pushing members 50 with protruding 0a are attached at intervals longer than the length of the above-mentioned lifting platform 3 in the rotating direction of the conveyor belt 5.

In addition, 62 is a two-tier stacking device that stacks mahjong tiles, which are arranged in a fixed posture and sent out by the conveyor 60 from the tile washing hopper of the tile supply section z, into two tiers in front of the entrance y of the guideway 4. ,
P is a guide rail for the conveyor belt 5 that is formed integrally with the standby stand 4a at the lower part of the bottom plate 40 of the guideway 4 that constitutes the standby stand 4a;
indicates mahjong tiles. In addition, the belt 5 mentioned above
The motor M that drives the two-stage stacking device 62
Mahjong tiles are stacked in two layers and pushed into the guideway 4 by the pushing device 61 until a predetermined number of tiles are placed on the first standby stand 4a that is continuous with the entrance y of the guideway 4. When the mahjong tiles are aligned on the waiting table 4a, the tile extrusion member 50 is driven by the operation of the sensor that detects this, and the rotation of the conveyor belt 5 thereby causes the tile extrusion member 50 to move the mahjong tiles aligned on the waiting table 4a of the first place to the next place. The mahjong tiles are pushed out onto the waiting table 4a, and stop when they are lined up on the next waiting table 4a, and then a predetermined number of mahjong tiles are sent onto the first waiting table 4a again. It is controlled to repeat the same operation.

[Function] The embodiment device configured as described above functions as follows.

A conveyor belt 5, which is stretched along the guideway 4 in the vicinity of the guideway 4 installed in the shape of a substantially rectangular enclosure frame, is arranged at an open part w at one corner of the guideway 4 and has a spindle. When the tension arm b rotating around the center e is rotated counterclockwise in FIG. 4 by the spring g, the tension ring c pivotally supported at the rotating end of the tension arm b is By pulling out the conveyor belt 5 in the outer circumferential direction, it is tensioned to a degree corresponding to the spring pressure of the spring g.

The degree of tension can be adjusted as desired by adjusting the tension of the spring g.

Therefore, this adjustment is possible because the tension ring c is disposed in the open part w at one corner of the guideway 4, so that the guideway 4 is
You will be able to do it easily without being disturbed.

[Effect of the invention] As explained above, the conveyor belt tensioning device in the mahjong tile conveyance device of the automatic mahjong table according to the present invention has a tensioning device for the conveyor belt in the vicinity of the guideway 4 installed in the shape of a substantially rectangular enclosure frame. In order to tension the conveyor belt 5 stretched along the path 4, a tension ring c for tensioning the conveyor belt 5 is arranged within the open portion w of the guide path 4 in the shape of a square enclosing frame. The conveyor belt 5 is supported on the machine frame 2 so as to be movable in the tensioning direction, and is biased by a spring g so as to be pushed out in the tensioning direction. The work of adjusting the tension of the endless conveyor belt 5 stretched along the guideway 4 near the guideway 4 is carried out at the open section w where the guideway 4 is cut out.
, the guideway 4 can be used easily without being obstructed by the guideway 4.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the conventional means, FIG. 2 is a longitudinal side view of the same as above, FIG. 3 is a perspective view of an automatic mahjong table in which the present invention can be implemented, FIG. 4 is a plan view of the tile alignment device of same as above,
Figure 5 is a longitudinal sectional view of the main part of the above, Figure 6 is a front view of the same part, Figure 7 is a partially cutaway side view of the same part, and Figure 8 is a tension wheel and drive wheel of the same. FIG. 3 is a partially cutaway side view. Explanation of drawing symbols, A... Automatic mahjong table, a... Guide rail, b... Tension arm, c... Tension wheel, d... Drive wheel, e... Support shaft, f... Mounting machine frame, g... Spring, h, i... Conduction gear, j... Guide rail, 1... Mahjong table, 10... Drop opening, 1
1...Opening/closing lid, 12...Window hole, 2...Machine frame, 20
... Base plate, 3 ... Lifting platform, 30 ... Connection block, 31 ... Support column, 4 ... Taxiway, 4a
... Standby stand, 4b ... Connecting member, 40 ... Bottom plate, 40a ... Cleavage, 42, 43 ... Supporting member,
44...screw, 5...belt, 50...extrusion pin, 50a...upper end, 60...conveyor, 61
... Pushing device, 62 ... Two-tier stacking device, P ... Mahjong tiles, w ... Opening section, y ... Entrance, z ... Tile supply section, M ... Motor.

Claims (1)

[Scope of utility model registration request] In a flat box-shaped machine frame 2 that supports the mahjong table 1, four lifting tables 3 are arranged so as to form a substantially quadrilateral in plan view and are supported so as to be able to rise and fall freely. At the outside position, a guide path 4 in the shape of a substantially square enclosing frame is installed along the outer edge of the elevator platform 3, with an open part w formed at one corner of the guide path in plan view. Near the path 4, there is a conveyor belt 5 that rotates endlessly along the guide path 4.
is stretched and supported on the machine frame 2, and the conveyor belt 5 has a plurality of tile pushing members 50 projecting into the guiding path 4 at predetermined intervals in the rotating direction of the conveyor belt 5. In the conveying device for mahjong tiles of an automatic mahjong table, the tension ring c of the conveyor belt 5 is arranged within the open part w of the guide path 4 in the shape of a square enclosing frame, and the conveyor belt 5 A tensioning device for a conveyor belt in a conveyor for mahjong tiles of an automatic mahjong table, which is supported on a machine frame 2 so as to be movable in the tensioning direction, and is biased by a spring g so as to be pushed out in the tensioning direction.