JP2811532B2 - Horizontal screw tightening machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal screw tightening machine for stably performing horizontal screw tightening.

[0002]

2. Description of the Related Art Conventionally, when screw parts are screwed into a vertical work surface, an automatic screw tightening machine whose axis is kept horizontal has been used. For supplying parts to this type of screw tightening machine, a method of connecting the parts feeder etc. and the screw tightening machine with a supply hose and feeding the screw parts from the parts feeder by air is used, Since it is difficult to air-push with screw parts with short screw shafts,
Screw parts are supplied from the parts feeder using a chute or the like. As shown in FIG. 6, a screw feeding method using this method includes a parts feeder 51 above a screwing machine 50.
Are placed on this part feeder 51 and the shoot rail 5
2 are connected. Parts feeder 5
The first rail 51a is substantially horizontal, and the chute rail 52 connected thereto extends to the tip of the screw driver 53 below.
2a is formed.

[0003]

When a screw component is transferred from the parts feeder 51 to the chute rail 52 in the screw tightening machine 50, the screw component slides down along the chute rail 52 by its own weight. At the time of this supply, the screw shaft portion always faces outward of the screw tightening machine 50. At this time, the axial direction of the threaded part is the curved portion 5 of the chute rail 52.
By passing through 2a, the axis is gradually changed from the vertical direction to the horizontal direction, and is supplied to the chuck pawl at the end of the chute rail 52. However, when screw components are supplied by this method, screw clogging occurs in the bowl bent portion of the chute rail, and there is a problem that the screw components are not supplied to the chuck claws. In addition, it has been pointed out that since the overall length of the shoe rail becomes longer, it is difficult to uniformly adjust the interval between the rails over the entire length of the shoot rail, and a problem that screw clogging occurs in an unexpected place. I have. There is a strong need in the industry to solve these problems, and the present invention has been created to meet this demand.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a horizontal screw tightening machine for stably supplying a screw component in a horizontal screw tightening operation.
In order to achieve this object, a component supply feeder having a horizontally extending linear transfer path for aligning and transferring screw components is provided, and a driver bit and a driver bit rotating means are arranged in parallel with the transfer path in the component supply feeder. And a driver unit having the following. On the other hand, a cylindrical guide sleeve is fixed near the transfer path end point of the component supply feeder, and a lead groove is spirally formed in the guide sleeve. Then, a sliding shaft provided with a projection at one point on the outer periphery of the guide sleeve is movably inserted along the inner diameter of the guide sleeve, and the projection of the sliding shaft is engaged with the lead groove of the guide sleeve. On the other hand, one end of the sliding shaft is connected to a holding member that is located in front of the end point of the transfer path in the component supply feeder and holds a screw component transferred from the transfer path,
The other end is connected to a horizontal moving means for horizontally moving the sliding shaft. Further, a blocking member for restricting the movement of the threaded component on the transfer path is provided around the transfer path in the component supply feeder.

[0005]

In the horizontal screw tightening machine, when a screw component is supplied to the holding member from the component supply feeder through the transfer path, the holding member is moved to the tip end of the driver unit by the horizontal moving means. At this time, when the sliding shaft slides along the guide sleeve, the protrusion of the sliding shaft follows the lead groove, so that the sliding shaft advances while rotating. Accordingly, when the holding member arrives at the tip of the driver unit, the holding member is compared with a state where the holding member is located at the end of the transfer path.
It is rotated 0 °. This is because the axis of the threaded component fed in the transfer path is oriented in the vertical direction, and is oriented in the horizontal direction corresponding to the driver unit installed so that the driver bit is oriented in the horizontal direction. Thereafter, the screw component held by the holding member by the driver unit is tightened into a work or the like.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a horizontal screw tightening machine according to the present invention. 1 to FIG.
Is a horizontal screw tightening machine (hereinafter referred to as a screw tightening machine), and a bowl feeder 2 which is an example of a component supply feeder having a transfer path 2a extending substantially horizontally attached in a direction tangential to the outer periphery, and the bowl feeder 2. 2 transfer path 2a
Are provided on a substrate 5 at a lateral position of the substrate 5, a driver unit 3 installed with its axis directed in the horizontal direction, and a chuck unit 4 installed in front of the bowl feeder 2 and the driver unit 3. Further, a switch box 6 for operating the screw tightening machine is installed at the rear of the substrate 5.

The driver unit 3 is mounted on a driver base 8 supported by two columns 7, 7 erected on a substrate 5. A first fixing member 9 is fixed to a front portion of the driver base 8, and a second fixing member 10 is fixed to a rear portion. These first and second fixing members 9,
Two guide shafts 11 are provided in parallel between the first and second guide shafts 10. A first sliding member 12 movable in the horizontal direction along the guide shaft 11 and a first sliding member 12 A second sliding member 14 connected by a shaft 13 is mounted. The first sliding member 12 includes the second fixing member 10.
Is connected to a cylinder 15 attached thereto, and moves forward and backward by the operation of the cylinder 15. In addition, this first
The sliding member 12 has a plate shape, and an automatic screw tightening driver 16 for rotating a driver bit 16c by a motor as an example of a driver bit rotating means is provided on an upper rear surface.
(Hereinafter, referred to as a driver 16). A driver bit 16c is held on an output shaft 16a of the driver 16 via a bit holder 16b. The driver bit 16c and the bit holder 16b
Is a sleeve 17 attached to the second sliding member 14
It is included in. An air suction hole 17a is opened at the rear portion of the sleeve 17, and air is sucked from the air suction hole 17a to suck and hold the screw component at the tip of the sleeve 17. On the other hand, the second sliding member 14 is
Similarly, it is slidable along the guide shaft 11 and also slidable along the connecting shaft 13 extending from the first sliding member 12. A spring 18 is inserted through the connecting shaft 13, and the spring 18 constantly connects the second sliding member 14 to the connecting shaft 13.
To the front end position of the.

The bowl feeder 2 is provided beside the driver unit 3. The bowl feeder 2 is for arranging and supplying the components put into the bowl to a transfer path 2a extending spirally from the inner circumference to the outer circumference of the bowl by vibration. The transfer path 2a is horizontally and linearly formed from the outer circumference of the bowl. It extends so as to be parallel to the axis of the driver unit 3. The length of the transfer path 2a in the bowl feeder 2 is set to a necessary minimum length (to the extent that the number of threaded parts aligned on the transfer path 2a is not insufficient). 3 is set at a position in line with the front end.

The chuck unit 4 is provided in front of the driver unit 3 and the bowl feeder 2. The chuck unit 4 has a mounting plate 19 erected on the driver base 8, and a cylinder 20, which is an example of a horizontal moving unit, is mounted on a lower part of one end surface of the mounting plate 19. The cylinder rod 20a of the cylinder 20 extends through the mounting plate 19 and is connected to a lower portion of a connecting plate 21 located in front of the mounting rod. An upper part of the connecting plate 21 has an axis parallel to the cylinder rod 20a, and is connected to one end of a sliding shaft 22 having a projection formed by driving a pin 22a at one point on the outer periphery. The sliding shaft 22 penetrates through the mounting plate 19 and protrudes toward the cylinder 20 mounting surface side of the mounting plate 19.
Is configured to pass through the inner diameter of a cylindrical guide sleeve 23 attached to a surface of the attachment plate 19 opposite to the cylinder 20 attachment surface. The guide sleeve 23 has a substantially spiral lead groove 24 formed therein.
4 is engaged with a pin 22a of the sliding shaft 22. Also,
A pair of openable and closable chuck claws 26 is connected to the other end of the sliding shaft 22 via a support 25. The chuck claw 26 has a holding portion 26a projecting in the horizontal direction, and a U-shaped holding groove 26b having a width slightly smaller than the rail interval of the transfer path 2a is formed in the holding portion 26a. Have been. A spring 26c is suspended from the front surface of the chuck claw 26, and urges the chuck claw 26 in a direction in which it is always closed.

On the other hand, the guide sleeve 2 of the mounting plate 19
3 A cylindrical sleeve 27 is fixed to the mounting surface.
An urging shaft 28 is slidably inserted through the sleeve 27 along the inner diameter portion. One end of the biasing shaft 28 penetrates through the mounting plate 19 and protrudes from the mounting surface of the cylinder 20, to which a substantially rectangular blocking plate 29 as a blocking member is fixed. A stopper member 30 having a size larger than the inner diameter of the sleeve 27 is screwed to the other end of the urging shaft 28, and a rod-shaped spring hook 3 is attached to the stopper member 30.
0a is provided, and the other end of a spring 31 having one end fixed to the mounting plate 19 is wound around the mounting plate 19 so that the blocking plate 29 via the urging shaft 28 is always in contact with the side surface of the chuck pawl 26. I'm going.

A chuck opening bolt 32 is mounted on an upper portion of the mounting plate 19 on the cylinder mounting surface side. When the chuck pawl 26 is located at the end of the transfer path 2a of the bowl feeder 2, the chuck pawl 26 is pressed. It is configured to expand. Further, a first stopper bolt 33 is provided on the cylinder mounting surface of the mounting plate 19, and a second stopper bolt 34 is provided on the guide sleeve mounting surface, respectively. It is configured to determine the retreat position.

Next, the operation of this embodiment will be described. When the screw components are aligned and supplied from the bowl feeder 2 of the horizontal screw tightening machine 1 to the transfer path 2a, the screw parts are held by the transfer path 2a in a hanging manner and move toward the end of the transfer path 2a. Since the transfer path 2a has no bowl bent portion and a minimum length, the rail width can be easily adjusted, and the threaded component does not become clogged on the transfer path 2a. When the screw component arrives at the end of the transfer path 2a, the first one is moved and fitted into the holding groove 26b of the holding portion 26a of the chuck claw 26 as it is. As shown in FIG. 4, when the chuck pawl 26 is located at the end of the transfer path 2a, the chuck opening bolt 32 abuts and is pushed open, so that the screw component can enter the holding groove 26b of the chuck pawl 26. It is.
When the cylinder 20 operates in this state, the sliding shaft 22 slides along the inner diameter of the guide sleeve 23, and moves the chuck pawl 26 forward of the tip of the driver unit 3 as shown in FIG. At this time, since the pin 22a of the sliding shaft 22 moves following the lead groove 24 of the guide sleeve 23, the sliding shaft 22 and the chuck pawl 26 rotate 90 ° as compared with the position at the end of the transfer path 2a. Driver unit 3
Arrive at the tip. As a result, the axis of the screw, which was vertical when transferred onto the chuck pawl 26 from the transfer path 2a, changes its direction horizontally. Incidentally, the rotation direction is the direction in which the front surface of the chuck pawl 26 (the suspension surface of the spring 26c) faces upward. Further, with the movement of the chuck pawl 26, the blocking plate 29 which has been in contact with the chuck pawl 26 also moves toward the driver unit 3 by the spring force. However, since the stopper member 30 contacts the sleeve 27 when the blocking plate 29 reaches the position covering the end of the transfer path 2a, the blocking plate 29 stops at that point. Since the blocking plate 29 covers the end of the transfer path 2a, the screw does not fall out of the transfer path 2a even if the chuck claw 26 moves.

After the chuck pawl 26 reaches the tip of the driver unit 3, the cylinder 15 is operated, and the first and second sliding members 12 and 14 are slid forward along the guide shaft 11. Thereby, the driver 16 and the bit holder 16
b, the driver bit 16c and the sleeve 17 move forward, and the tip of the sleeve 17 first contacts the head of the screw component held by the chuck pawl 26. At this time, the sleeve 17
Since the air is always sucked from the air suction hole 17a provided in the sleeve 17, the screw component is sucked to the tip of the sleeve 17. Thereafter, the driver 16, the bit holder 16b, the driver bit 16c, and the sleeve 17 advance while pushing the chuck pawl 26 open by the tip of the sleeve 17, push the screw component forward of the chuck pawl 26, and apply the screw component to the work by the driver bit 26c. Screw in.

[0014]

As described above, according to the present invention, a component supply feeder having a straight horizontal transfer path for aligning and transferring screw components is installed, and a driver bit and a driver bit are provided in parallel with the transfer path in the component supply feeder. A driver unit including a rotating unit is provided. On the other hand, a cylindrical guide sleeve is fixed near the transfer path end point of the component supply feeder, and a lead groove is spirally formed in the guide sleeve. A sliding shaft provided with a projection at one point on the outer periphery of the guide sleeve is movably inserted along the inner diameter of the guide sleeve, and the projection of the sliding shaft is engaged with the lead groove of the guide sleeve. One end of the sliding shaft is connected to a holding member that is located in front of the end point of the transfer path in the component supply feeder and holds a screw component transferred from the transfer path, and the other end of the slide shaft is horizontal. A horizontal screw tightening machine configured to connect a moving horizontal moving means and to provide a blocking member at a peripheral position of the transfer path in the component supply feeder to restrict movement of a screw component on the transfer path. In this horizontal screw tightening machine, the transfer path of the bowl feeder is installed horizontally and linearly, and the length of the transfer path is set to the minimum necessary. In addition to being able to eliminate, and configured to move forward and backward while rotating the chuck pawl, the axis of the screw part is moved from the vertical direction while moving the screw part transferred to the chuck pawl from the transfer path to the tip of the driver unit. It can be changed in the horizontal direction, and the screwing in the horizontal direction can be performed without any trouble even when the screw component is transported and supplied by the bowl feeder so that the axis is directed in the vertical direction.

[Brief description of the drawings]

FIG. 1 is a plan view of a horizontal screw tightening machine according to the present invention.

FIG. 2 is a partially cutaway side view of the horizontal screw tightening machine according to the present invention.

FIG. 3 is a front view of the horizontal screw tightening machine according to the present invention.

FIG. 4 is an enlarged explanatory view of a main part of the horizontal screw tightening machine according to the present invention.

FIG. 5 is an explanatory diagram of an enlarged operation of a main part of the horizontal screw tightening machine according to the present invention.

FIG. 6 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Horizontal screw tightener 2 Bowl feeder 2a Transfer path 3 Driver unit 4 Chuck unit 5 Substrate 6 Switch box 7 Support 8 Driver stand 9 First fixing member 10 Second fixing member 11 Guide shaft 12 First sliding member 13 Connecting shaft 14 2nd sliding member 15 cylinder 16 automatic screwdriver 16a output shaft 16b bit holder 16c driver bit 17 sleeve 18 spring 19 mounting plate 20 cylinder 21 connecting plate 22 sliding shaft 23 guide sleeve 24 lead groove 25 support 26 chuck jaws 26a Holding portion 26b Holding groove 26c Spring 27 Sleeve 28 Urging shaft 29 Blocking plate 30 Stopper member 31 Spring 32 Chuck opening bolt 33 First stopper bolt 34 Second stopper bolt

Claims (1)

(57) [Claims] 1. A component supply feeder having a horizontally extending linear transfer path for aligning and transferring screw components is provided, and a driver bit and driver bit rotating means are provided in parallel with the transfer path in the component supply feeder. While a driver unit is provided, a cylindrical guide sleeve is fixed near the end point of the transfer path of the component supply feeder, and a spiral lead groove is formed in the guide sleeve. A sliding shaft provided with a projection is movably inserted along the inner diameter of the guide sleeve, and the projection of the sliding shaft is engaged with the lead groove of the guide sleeve. A holding member for holding a screw component transferred from the transfer path, which is located in front of the end point of the transfer path in the component supply feeder, is connected, and a sliding shaft is horizontally moved to the other end. While connecting the horizontal moving means,
A horizontal screw tightening machine, wherein a blocking member for restricting movement of a screw component on the transfer path is provided at a position around the transfer path in the component supply feeder.