JPH0122716Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a crane for taking out prizes used in game machines that selects and takes out a desired prize from among a large number of prizes stored at the bottom of a closed box. .

Insert a coin, move the crane's trolley placed at the top of the closed box, stop it above the desired prize among the many prizes stored at the bottom of the box, and use the multiple gripping claws to Lower the gripping device with the gripping claws open until it touches the prize, and when it continues to rise, close the gripping claws first, and if the aim is good, it will grip the prize, and if the aim is off, it will be empty. Raise the gripping device while
A game machine from which prizes can be taken out is well known.

The first example of the gripping device used in such a game machine is
It is shown in Fig. 2.

The gripping device 01 houses a solenoid in a cylindrical base case 03 suspended from a rope 02, and has a plurality of spacers attached to the bottom of the base case 03.
The board 05 is fixed to the lower end of the pipe 04, and the board 05
An outer cylindrical body 08 is provided with a bracket 06 projecting thereon, one end of a plurality of gripping claws 010 is swingably connected to the bracket 06, and is loosely fitted into the base case 03 from below. Bottom plate 09 (spacer pipe 0
The solenoid plunger 07 is fixed to the outer cylindrical body 08 and the appropriate positions of the plurality of gripping claws 010 are connected to each other by a plurality of links 0.
11 are connected to each other. In addition, in the figure, 012 indicates a power supply cord.

Thus, when the solenoid is in a de-energized state, the solenoid plunger 07 is at the lower limit position and the plurality of gripping claws 010 are closed (see FIG. 1);
When the solenoid is energized and energized, the solenoid plunger 07 is attracted upward, and the outer cylindrical body 08 integrated with the solenoid plunger 07 rises with respect to the base case 03, and the plurality of gripping claws 010 are attached via links 011. is lifted and its tip side is opened (see Figure 2).

However, in the gripping device 01, it is necessary to add a control circuit for turning the solenoid ON and OFF in conjunction with the lifting and lowering of the gripping device to the control circuit of the main drive system that runs the crane and lifts and lowers the gripping device. The structure in which the solenoid is housed in the case 03 and the solenoid plunger 07 is interlocked with the gripping claw 010 is complicated, the structure is large as a whole, and the manufacturing cost is high.

The present invention was devised against this technical background, and its purpose is to provide a crane for amusement machines equipped with a gripping device that is simple in structure, small in size, and inexpensive. .

The crane for amusement machines of the present invention includes a drive shaft that is reversibly rotated in conjunction with a drive source, a first hoisting drum that is fixed to the drive shaft, and a pivot that is rotatable relative to the drive shaft within a certain rotation angle range. A supported second winding drum, a braking member that brakes the rotation of the second winding drum, a first flexible linear member wound around the first winding drum, and a first flexible linear member wound around the second winding drum. a second flexible linear member, a main weight body suspended from the tip of the second flexible linear member, and a secondary weight body suspended from the tip of the first flexible linear member; The secondary weight body includes a plurality of gripping claws that are swingably connected at one end, and a plurality of links that have one end connected to the main weight body and the other end connected to the plurality of gripping claws. It is characterized by

In the present invention, when the drive shaft is rotated in either the forward or reverse direction, the first winding drum, which is integrated with the drive shaft, rotates, but the second winding drum is braked by the braking member, so the second winding drum rotates. It does not rotate until the single-roll drum rotates by a certain rotation angle. Therefore, when only the first winding drum rotates and the first flexible linear member is unwound, the secondary weight body descends, the plurality of gripping claws open, and then the second winding drum begins to rotate. Then, the second flexible linear member is also unwound at the same speed as the first flexible linear member, and the main weight body and the sub weight body descend at the same speed (with the gripping claws remaining open).

When the drive shaft is reversed after the rewinding of the first and second flexible linear members is completed, the second winding cylinder is braked by the braking member, so first the first winding cylinder rotates and the first winding cylinder rotates. One flexible linear member is wound up, the secondary weight body rises, and the plurality of gripping claws close. After the first winding drum rotates by a certain angle, the second winding drum also starts to reverse rotation, and the second flexible wire member is also wound up at the same speed as the first flexible wire member, and the second flexible wire member is also wound up with the main weight body. The secondary weight body rises at a constant speed (with the gripping claws closed).

In this way, in the present invention, the first winding drum is fixed to the drive shaft, and the second winding drum is pivotally supported to be rotatable relative to the drive shaft within a certain rotation angle range,
The second winding drum is braked by the braking member, and a sub weight body and a main weight body are attached to the tips of the first and second flexible linear members wound around the first and second winding drums, respectively. is suspended, and multiple gripping claws are opened and closed by the relative displacement of both weights, so simply rotating the drive shaft in forward and reverse directions will allow
It is possible to raise and lower the gripping device and open and close the gripping claws, and there is no need for a control circuit for opening and closing the gripping claws.The structure of the gripping device is simple, downsizing is achieved, and manufacturing costs are low. be.

An embodiment of the present invention will be described below with reference to FIGS. 3 and 4.

FIG. 3 schematically shows the main parts of the crane for a game machine.

Reference numeral 1 indicates a reversible motor disposed on the base frame of the traveling truck, and the output of the motor 1 is taken out from an output shaft 3 of a reduction gear device 2. This output shaft 3 is linked to a drive shaft 4 which is also rotatably supported on the base frame of the traveling truck. A first steel winding drum 5 is fixed to the drive shaft 4, and a second steel winding drum 6 is rotatably supported.

A through hole 6a having a predetermined length along the circumferential direction is formed in the second winding drum 6. This through hole 6
a is located closer to the rotation center than the rope winding surface and is formed over a constant rotation angle range θ. On the other hand, a locking rod 5a is protruded from the side surface of the first winding drum 5 in parallel with the drive shaft 4, and the locking rod 5a passes through a through hole 6a of the second winding drum 6. Further, an electromagnet 7 is disposed close to the outer surface of the second winding drum 6, so that a light brake can be applied to the second winding drum 6.

A first rope (which may be a chain) 10 and a second rope (which may be a chain) 20 are wound in the same direction around the first and second winding drums 5 and 6, respectively.
0 engages with a pulley P disposed on the base frame of the traveling truck, and a sub-weight body 34 and a main weight body 31 of a gripping device 30, which will be described later, are suspended from the ends of each pulley P. In addition,
The first rope 10 passes through approximately the center of the main weight body 31 in the upward and downward directions.

One end of a plurality of gripping claws 36 is swingably connected to a bracket 35 attached to the lower end of the auxiliary weight 34, and the bracket 32 attached to the lower end of the main weight 31 A plurality of links 33 connect the plurality of gripping claws 36 to appropriate positions.

The present embodiment is constructed as described above, and the state in which the gripping device 30 is raised is as shown in FIG. 36 is closed.

When motor 1 is started in this state, output shaft 3
rotates in the direction of arrow A, and the drive shaft 4 and the first winding drum 5 integral therewith also rotate in the direction of arrow A. At this time, the second winding drum 6 does not rotate because it is lightly braked by the electromagnet 7, and the locking rod 5a moves along the through hole 6a. Therefore, the first winding drum 5
Only the first rope 10 wound around is unwound,
The auxiliary weight body 34 descends with respect to the main weight body 31 which is in a stationary state, and the plurality of gripping claws 36 are released as the sub-weight body 34 descends. Then, when the first winding drum 5 rotates by an angle θ-α (α corresponds to the rod diameter of the locking rod 5a), the locking rod 5a comes into contact with the other end edge of the through hole 6a. , the lowering of the secondary weight body 34 relative to the main weight body 31 is stopped, and the release of the gripping claws 36 is completed (see FIG. 4). At the same time, the second winding drum 6 that engages with the locking rod 5a also starts rotating together with the first winding drum 5, and now the first rope 10 and the second rope 20 are unwound at a constant speed.
Therefore, the main weight body 31 and the secondary weight body 34 are lowered together.

In this way, when the gripping device 30 completes its descent, if the prize is successfully located directly below, it can be lifted by the gripping device 30. Next, the movement of the gripping device 30 when it rises will be explained.

The states of the first and second winding drums 5, 6 and the gripping device 30 during the descent and at the completion of the descent are as shown in FIG. 4, but when the motor 1 starts to reverse rotation,
The output shaft 3 rotates in the direction of arrow B, and the drive shaft 4 and the first winding drum 5 integral therewith also rotate in the same direction.
At this time, the second winding drum 6 does not rotate because it is lightly braked by the electromagnet 7, and the locking rod 5a
migrates along the through hole 6a. Therefore, only the first rope 10 is wound around the first winding drum 5, and the secondary weight body 34 rises with respect to the main weight body 31 which is in a stationary state, and as the secondary weight body 34 rises, the plurality of gripping claws 36 close. At this time, if the prize is successful, the plurality of gripping claws 36 grip the prize.

Then, the first winding drum 5 is at an angle θ-α (however, α is
When the locking rod 5a is rotated by an amount corresponding to the rod diameter of the locking rod 5a, the locking rod 5a comes into contact with one end edge of the through hole 6a,
The sub-weight body 34 stops rising relative to the main weight body 31, and the gripping claws 36 are completely closed. At the same time, the second winding drum 6 that engages with the locking rod 5a also starts rotating together with the first winding drum 5, and the first rope 10, second rope 20
is wound at a constant speed. Therefore, the main weight body 31 and the secondary weight body 34 rise together.

Thereafter, the traveling truck moves, the crane returns to the standby position, and the motor 1 rotates to open the gripping claws 36 and release the prize being gripped to the external outlet.

In this way, according to this embodiment, it is possible to raise and lower the gripping device 30 and open and close the gripping claws 36 by simply using the motor 1 as a single drive source.
The gripping device 30 has a simple structure, is small in size, and is inexpensive to manufacture.

In the embodiment described above, in order to rotate the second winding drum 6 relative to the drive shaft 4 by a predetermined angle,
Although the through hole 6a is formed and the locking rod 5a of the first winding drum 5 is engaged with the through hole 6a, other means as shown in FIGS. 5 to 7 may be adopted.

That is, a notch groove 46b along the circumferential direction is formed in the shaft hole 46a of the second winding drum 46, and the drive shaft 44 is
The small locking projection 44a is provided so that when the drive shaft 44 is inserted into the shaft hole 46a, the notch groove 46b and the small locking projection 44a are engaged.
The small locking projection 44a is slidable within the notch groove 46b, and therefore, unless the small locking projection 44a comes into contact with either end surface of the notch groove 46b, the second winding drum 46 is rotatable relative to the drive shaft 44. Note that the circumferential length of the notch groove 46b is
It may be determined in accordance with the stroke of the secondary weight body 34 necessary for opening and closing the gripping claws 36. Also, the second winding drum 46
The point that braking is applied is the same as in the previous embodiment.

Further, in the above embodiment, the electromagnet 7 is used as a braking means for the second winding drum 6, but a driven rotating roller capable of applying a light load to the second winding drum 6 may be brought into contact with the second winding drum 6, or the second winding drum 6 may be Braking means as shown in FIGS. 8 and 9 may be employed.

That is, the brake plate 50 is attached to the outer surface of the second winding drum 6, and the screw 55 is inserted through the center opening 51 thereof.
The brake plate 50 is screwed onto the shaft end of the drive shaft 4 (in the figure, 56 indicates a washer), and with a pair of screws 57 in the pair of screw openings 52, the brake plate 50 is attached to the second winding drum 6.
to be fixed. A pair of openings, namely a first opening 53 and a second opening 54, are formed close to the outer periphery of the brake plate 50 and located on the same circumference centered on the central opening 51. so that it can match,
The steel ball 58 is pressed against the brake plate 50 with a predetermined pressure.
To apply this pressing force, a cylindrical nut 60 is fixed to a support plate 59 fixed to the machine frame of the game machine main body,
A brake adjustment screw 61 is screwed into the screw hole on the head side, a compression coil spring 62 is fitted into the hollow part on the tip side, and with this compression coil spring 62,
This biases the steel ball 58. Therefore, by appropriately rotating the brake adjustment screw 61, the pressing force of the steel ball 58 against the brake plate 50 can be adjusted.

Thus, while the gripping device 30 is at the upper limit position,
The steel ball 58 is aligned with the first opening 53, and even if the first winding drum 5 starts rotating integrally with the drive shaft 4, the second winding drum 6, which is integral with the brake plate 50, does not rotate and is locked. Rod 5a
As soon as the second winding drum 6 engages with one end of the through hole 6a,
Then, the brake plate 50 begins to rotate, and the steel ball 58 leaves the first opening 53, contacts the surface of the brake plate 50, and rotates.

Then, when the gripping device 30 reaches the lower limit position,
The steel ball 58 fits into the second opening 54 and the gripping device 3
0 starts rising, a predetermined braking force is applied to the second winding drum 6.

As is clear from the above explanation, in the present invention, the first winding drum is fixed to the drive shaft, and the second winding drum is pivotally supported to be rotatable relative to the drive shaft within a certain rotation angle range, and the braking The second winding drum is braked by the member, and a sub weight body and a main weight body are respectively attached to the tips of the first and second flexible linear members wound around the first and second winding drums. The configuration is such that multiple gripping claws can be opened and closed by the relative displacement of both weights, so the gripping device can be raised and lowered and gripped simply by rotating the drive shaft in forward and reverse directions using a single drive motor. The claws can be opened and closed, no control circuit is required for opening and closing the gripping claws, the structure of the gripping device is simple, miniaturization is achieved, and manufacturing costs are low.

[Brief explanation of drawings]

FIGS. 1 and 2 are explanatory diagrams showing the structure and operation mode of a known gripping device for a crane for a game machine,
FIGS. 3 and 4 are explanatory diagrams showing the elevating mechanism and operation mode of a crane for amusement machines according to one embodiment of the present invention, and FIG. and a perspective view of the drive shaft, FIG. 6 is a side view showing its assembled state, FIG. 7 is a cross-sectional view taken along the - line in FIG. 6, and FIG. 8 is an exploded perspective view of the elevating mechanism according to another embodiment. 9 are sectional views of essential parts showing the second winding drum and the braking means. DESCRIPTION OF SYMBOLS 1...Motor, 2...Reduction device, 3...Output shaft, 4...Drive shaft, 5...First winding cylinder, 5a...Latching rod, 6...Second winding cylinder, 6a...Penetration Hole, 7...
Electromagnet, 10... first rope, 20... second rope, 30... gripping device, 31... main weight body, 32...
... Bracket, 33 ... Link, 34 ... Secondary weight body, 35 ... Bracket, 36 ... Gripping claw, 44
... Drive shaft, 44a ... Small locking projection, 46 ... Second winding drum, 46a ... Shaft hole, 46b ... Notch groove.

Claims (1)

[Scope of utility model registration request] A crane for an amusement machine equipped with a plurality of gripping claws that open when descending and close when ascending includes a drive shaft that rotates reversibly in conjunction with a drive source, a first winding drum fixed to the drive shaft, and a first winding drum fixed to the drive shaft. a second winding drum that is pivotally supported to be rotatable relative to the drive shaft within a certain rotational angle range; a braking member that brakes rotation of the second winding drum; and a second winding drum that is wound around the first winding drum. a first flexible linear member, a second flexible linear member wound around the second winding drum, and a main weight body suspended from the tip of the second flexible linear member; a secondary weight suspended from the tip of the first flexible linear member; a plurality of gripping claws having one end swingably connected to the secondary weight; and one end connected to the main weight. A crane for an amusement machine, comprising a plurality of links connected to the plurality of gripping claws, the other end being connected to the plurality of gripping claws.