JP2953247B2 - Nut insertion device for power tools - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for automatically inserting a nut into each socket of a power tool.

[0002]

2. Description of the Related Art As a conventional device as described above, for example, those shown in FIGS. 3 (a), 3 (b) and 4 are known, and this conventional device shown in FIG. A turntable 2 having five nut holding recesses 2a corresponding to the electric tool 1 having a nut, a tool holder 3, a turntable driving rotary actuator 4, a positioning cylinder 5, a set cylinder 6, and five nuts Holding recess
2a, five nut insertion pins 7, a pin drive rotary actuator 8, and a push-up cylinder 9
With

In the apparatus 10, when the electric tool 1 is set on the tool holder 3, first, the turntable 2
Are intermittently driven to rotate by the turntable drive rotary actuator 4 and are positioned at the stop position by the positioning cylinder 5 to sequentially position the five nut holding recesses 2a at the predetermined set positions on the left side in the figure. The nut 12 supplied from the parts feeder 11 provided adjacent to the set position is pushed by the set cylinder 6 during the index rotation, and the five positions are set at the set position. The nut insertion pins 7 which are sequentially set in the nut holding recesses 2a, and which are driven to rotate by the pin drive rotary actuator 8 and are urged by the push-up cylinder 9 to ascend, are moved in the nut holding recesses 2a. Lift the nut 12 while rotating it and insert it into each socket 1a of the power tool 1 while adjusting the phase. That.

[0004]

However, such a conventional device 10 rotates the nut insertion pin 7 to align the phases of the sockets 1a of the power tool 1 and the nuts 12.
Since the rotary drive mechanism including the pin drive rotary actuator 8 is provided, and the number of nut insertion pins 7 corresponding to the number of sockets 1a of the power tool 1 is provided, the structure becomes complicated and bulky. There was a problem.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an apparatus which advantageously solves the above-mentioned problems, and a nut insertion device for an electric tool according to the present invention comprises a plurality of sockets of an electric tool. A turntable having a plurality of socket receiving holes each rotatably receiving, and a turntable rotating means for indexing and rotating the turntable so that each socket receiving hole is sequentially positioned at a predetermined nut insertion position, Pin advance / retreat driving means for moving one nut insertion pin forward / backward toward the socket receiving hole arranged at the nut insertion position to insert the nut into the socket, and the power tool and the turntable respectively. And a tool control electrode provided and in contact with each other.

[0006] The device of the present invention may further include a tool charging electrode provided on the electric tool and the turntable, respectively, and being in contact with each other.

[0007]

In this device, when the power tool is set on the turntable such that each socket is housed in each socket housing hole of the turntable and the tool control electrodes of the power tool and the turntable are brought into contact with each other. Each socket is driven by a power tool turned on via a tool control electrode to rotate each socket, while the turntable is driven by turntable rotating means to rotate indexing, and the indexing rotation causes each of the turntables to rotate. When the socket receiving holes are sequentially positioned at the predetermined nut insertion position,
The nut insertion pin is driven by the pin advance / retreat driving means to advance / retreat with respect to the socket receiving hole, and the nut is sequentially rotated into each socket which is automatically phase-aligned because it is rotated in each socket receiving hole. insert.

Therefore, according to the apparatus of the present invention, the nut can be automatically inserted into each socket of the power tool, and of course, the nut insertion pin is used to align the phase of each socket of the power tool with the nut. Since a rotating mechanism for rotating the power tool can be dispensed with, and the number of nut insertion pins corresponding to the number of sockets of the power tool can be eliminated, the device can be made simple and compact.

[0009] If the device of the present invention further comprises a tool charging electrode provided on the power tool and the turntable and in contact with each other, when the power tool is a rechargeable type, the device is inserted into the socket. Always use a rechargeable power tool because the power tool can be charged via its tool charging electrode while the power tool is set on the turntable for inserting nuts and waiting for the next assembly Can be placed in possible condition.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 (a) and 1 (b) are a longitudinal sectional view and a plan view of the nut insertion device for an electric tool according to an embodiment of the present invention, as viewed from the direction of arrow A. FIG. 3 is a circuit diagram showing a part of an electric circuit in FIG.

That is, the apparatus of this embodiment is, for example, a rechargeable power tool 1 having three sockets 1a. The rechargeable power tool 1 has three socket receiving holes 13a capable of rotatably accommodating the three sockets 1a. A turntable driving rotary actuator 4 (for example, a speed reducer) as a turntable rotating means for rotating the turntable 13 so that the table 13 and each socket accommodating hole 13a are sequentially located at the left nut insertion position in the figure. Servomotor), a positioning cylinder 5, a push-up cylinder 9 as a pin advance / retreat drive means for moving one nut insertion pin 7 toward and away from a socket receiving hole 13 a arranged at the nut insertion position, and an electric tool. 1 and turntable
13, two pairs of tool control electrodes 14 to 17 which are provided on the power tool 1 and the turntable 13 respectively.
And a pair of tool charging electrodes 18 and 19, respectively, which are provided on the first and second contacts and are in contact with each other.

Here, the turntable 13 has a support shaft
The center axis B is rotatably supported on the base 22 via the bearing 20 and the bearing 21. The nut insertion position is such that the socket accommodating hole 13a of the turntable 13 is rotated by the turntable 13. It is set at the highest position. The turntable drive rotary actuator 4, the positioning cylinder 5 and the push-up cylinder 9 are each fixedly supported on a base 22, and the output shaft 4 a of the turntable drive rotary actuator 4 is connected to the lower end of the support shaft 20. Is joined to. At the tip of the piston rod 5a of the positioning cylinder 5, a locating pin 23 which can be fitted into a locating hole 13b provided in the turntable 13 corresponding to the socket accommodating hole 13a.
Is fixed, and the piston rod of the push-up cylinder 9 is fixed.
The nut insertion pin 7 is fixed to the tip of 9a.

Further, although the device of this embodiment is omitted from the electric circuit of FIG. 2, three slip rings 24 provided around the turntable 13 and the slip ring 24 provided on the base 22 are provided. With these slip rings 24 and three brushes 25 sliding respectively, the slip rings 24
And through the brush 25, ensure continuity between the tool control electrodes 15, 17 and the tool charging electrode 19 on the rotating turntable 13 and the electric circuit fixed to the base 22 side,
The above nut insertion position and the retracted nut insertion pin 7 shown in the figure.
And a nut guide 26 installed in an inclined position on the base 22 adjacent to the set position between the nut guide 26 and the nut guide 26 to move the nut 12 supplied from a parts feeder (not shown) by its own weight. An escape cylinder 27 for moving the piston rod 27a forward and backward with respect to the passage between the end of the nut guide 26 and the set position, and move the nut 12 to the set position. They can be moved one by one.

Then, as shown in FIG.
The positive electrode + and the negative electrode-of a normal DC power supply (not shown) are directly connected to the tool charging electrode 19 and the tool control electrode 17 on the 13 side, respectively, and are connected to another tool control electrode 15 on the turntable 13 side. Indicates that the positive electrode of the DC power supply is a relay (C
R) 28 and a normal rotation speed control circuit 29. On the other hand, the tool control electrode 14 on the power tool 1 side which is paired with the tool control electrode 15 is connected to the motor 30 of the power tool 1.
The tool control electrode 16 on the power tool 1 side, which is connected to an electric circuit between the power tool 1 and the tool switch (SW) 31 and is paired with the tool control electrode 17, is connected between the motor 30 and the negative electrode of the rechargeable battery 32. The tool charging electrode 18 on the power tool 1 side, which is connected to the electric circuit between
It is connected to an electric circuit between the tool switch (SW) 31 and the positive electrode + of the rechargeable battery 32.

The operation of the rotary actuator 4, each of the cylinders 5, 9, 27 and the relay 28 is performed by a normal programmable logic controller (not shown).
It is controlled based on a program given in advance by C).

In such a device, in order to insert the nut 12 into the socket 1a and wait for the next assembly,
As shown in FIG. 1A, each socket 1a is accommodated in each socket accommodating hole 13a of the turntable 13, and
When the power tool 1 is set on the turntable 13 such that the tool control electrodes 14 to 17 and the tool charging electrodes 18 and 19 of the power tool 1 and the turntable 13 contact each other, the power tool 1 is set on the turntable 13. During the operation, the DC power source is always connected to the battery 32 of the power tool 1 through the tool charging electrodes 18 and 19 and the negative electrode pair 16 and 17 of the tool control electrode.
Is charged, and when the device is started in that state, under the control of the PLC, the CR 28 is first turned on to supply power to the motor 30 of the power tool 1 via the tool control electrodes 14 to 17. Then, each socket 1a is rotated by being driven by the motor 30. On the other hand, the turntable 13 is intermittently driven to rotate by the turntable drive rotary actuator 4 and the stop position is determined by the positioning cylinder 5 so that the turntable 13 is rotated. The indexing rotation is performed, and each socket receiving hole of the turntable 13 is rotated by the indexing rotation.
When the nuts 13a are sequentially positioned at the nut insertion positions, the nut insertion pins 7 are driven by the push-up cylinder 9 to move forward and backward with respect to the socket receiving holes 13a, and the escape cylinder
The nuts 12 supplied one by one in front of the pins 7 by the operation of 27 are sequentially inserted into the respective sockets 1a that are automatically rotated in phase because they are rotated in the respective socket receiving holes 13a.

When the insertion of the nuts 12 into the three sockets 1a of the power tool 1 is completed, the indexing rotation of the turntable 13 is stopped, and the CR 28 is turned off to turn off the motor 30 of the power tool 1. Is stopped, and thereafter only the charging is continued until the device is restarted.

Therefore, according to the apparatus of this embodiment, not only can the nut 12 be automatically inserted into each socket 1a of the electric tool 1, but also each socket 1a of the electric tool 1 and the nut 12 can be automatically inserted.
A rotation mechanism for rotating the nut insertion pins 7 for phase matching with the power tool 1 can be eliminated, and the number of the nut insertion pins 7 corresponding to the number of the sockets 1a of the power tool 1 can be eliminated. With a simple structure, it can be made compact.

In addition, according to the apparatus of this embodiment, the power tool 1 and the turntable 13 are further provided with tool charging electrodes 18 and 19 which are in contact with each other. While the power tool 1 is set on the turntable 13 to wait for the assembly of
The battery 32 of the power tool 1 is connected via the tool charging electrodes 18 and 19.
, The rechargeable power tool 1 can always be placed in a usable state.

Although the present invention has been described with reference to the illustrated examples, the present invention is not limited to the above examples. For example, instead of moving and setting the nut by its own weight as in the above-described embodiment, as in the conventional example, It may be set by pushing with a set cylinder. Further, the device of the present invention can be applied to a case where the number of sockets of the power tool is different from that of the above-described embodiment, and can also be applied to a non-rechargeable power tool.

[0021]

As described above, according to the nut insertion device for a power tool of the present invention, the number of sockets of the power tool and the rotation mechanism for rotating the nut insertion pin for aligning the phase of each socket of the power tool and the nut are reduced. Since the necessity of installation with a corresponding number of nut insertion pins can be eliminated, the device can be made simple and compact.

Further, if the device of the present invention further comprises a tool charging electrode provided on the electric tool and the turntable and in contact with each other, when the electric tool is a rechargeable type, the device can be inserted into the socket. Always use a rechargeable power tool because the power tool can be charged via its tool charging electrode while the power tool is set on the turntable for inserting nuts and waiting for the next assembly Can be placed in possible condition.

[Brief description of the drawings]

FIGS. 1A and 1B are a longitudinal sectional view and a plan view of a nut insertion device for a power tool according to an embodiment of the present invention, as viewed from the direction of arrow A. FIG.

FIG. 2 is a circuit diagram showing a part of an electric circuit in the device of the embodiment.

FIGS. 3A and 3B are a longitudinal sectional view showing a conventional power tool nut insertion device and a plan view excluding the power tool.

FIG. 4 is a plan view showing the conventional device together with a parts feeder.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Power tool 1a Socket 4 Turntable drive rotary actuator 5 Positioning cylinder 7 Nut insertion pin 9 Push-up cylinder 11 Parts feeder 12 Nut 13 Turntable 14-17 Tool control electrode 18, 19 Tool charging electrode

Claims (2)

(57) [Claims] 1. A plurality of sockets (1a) of a power tool (1).
A turntable (13) having a plurality of socket accommodation holes (13a) for rotatably accommodating the turntable, and a turn for indexing and rotating the turntable such that the socket accommodation holes are sequentially positioned at predetermined nut insertion positions. Table rotating means (4, 5), and a nut (12) inserted into the socket by moving one nut insertion pin (7) toward and away from the socket receiving hole arranged at the nut insertion position. And a tool control electrode (14 to 17) provided on the electric tool and the turntable, respectively, for contacting with each other. 2. A tool charging electrode provided on the electric tool and the turntable, the tool charging electrode being in contact with each other.
The nut insertion device for a power tool according to claim 1, further comprising (19).