JPH0236702Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a separate supply device for aligning screws used in tools such as screw tightening machines.

(Prior art) As shown in Fig. 5a, a screw for feeding screws N, N, etc. aligned in parallel is used as a separating and feeding device for aligning screws used in a conventional tool such as a screw tightening machine. An escape tube 11 provided at the tip of the screw supply path 10 and a pushing means for pushing out the head of the first screw N guided into the escape tube 11 from the screw supply path 10 toward the front of the escape tube 11. 12, and extrudes the screws N guided into the escape cylinder 11 by the extrusion means 12,
There is a system in which the screws N are fed to a hole tool such as a screw driver in front of the escape tube 11 by a compressed air flow that is forced into the escape tube 11 from the screw supply path 10. In the above-mentioned apparatus for separating and supplying alignment screws, the central axis of the extruding means 12 is provided on an extension of the central axis of the escape tube 11. However, many of the screws do not meet the standards such as JIS, and as shown in Figure 6 a, b, and c.
If the central axis of the head N1 and leg N2 is eccentric, or if the head N1 is deformed, or if the head N1 is
The top surface of 1 is often tilted. Therefore, when pushing out the screws N inside the escape tube 11 by the extrusion means 12, the screws N
If the screws N are non-standard screws as described above, the extrusion means 12 may push a portion of the screws N that is deviated from the central axis.
2 is the screw supply path 10 from the center axis of the screws N.
When pressing a part far from the screw, the leg part N2 of the screw is tilted and pushed back toward the screw supply path, and the screw gets stuck in the escape tube 11, resulting in poor feeding.

In addition, since the escape tube 11 is slightly larger than one screw, as shown in FIG. 5b, the head of the leading screw N in the screw supply path 10
It may protrude inside. In this case as well, the protruding screws N are pushed out together with the screws N _p in the escape tube 11 by the operation of the pushing means 12,
Screws may become jammed.

(Technical issues of the invention) The present invention solves the above problems, prevents the screws from clogging in the escape cylinder, and separates and supplies alignment screws that can reliably feed the screws to the front of the escape cylinder. The technical challenge is to propose a device.

(Means for Solving the Problems) In order to solve the above-mentioned problems, a separation supply device for aligned screws according to the present invention includes a screw supply path for feeding screws arranged in parallel, and a screw supply path for feeding screws arranged in parallel. A cylindrical escape cylinder having an inner diameter slightly larger than the outer diameter of the head of the screw to accommodate the leading screw on the screw supply path, which is placed at the tip of the screw supply path; A rod-shaped extrusion means that can move forward and backward along the central axis of the escape tube for pushing out the leading screws guided into the escape tube from the screw supply path into the escape tube, and a tip end of the extruder hand. The center of the extrusion means is arranged with its center being offset toward the screw supply path side with respect to the central axis of the escape cylinder, and at least on the screw supply path side of the distal end of the extrusion means, there is a slope with the rear side facing toward the screw supply path side. It is characterized by forming a surface.

(Function of the invention) In the above structure, by arranging the center of the tip of the extrusion means to be biased toward the screw supply path side with respect to the central axis of the escape cylinder, the leading screw supplied into the escape cylinder is The extrusion means acts on the biased part of the head of the screw, so that a rotational force is applied to the screw so that the tip of the shaft section is directed in the opposite direction to the screw supply path. .

Further, at least on the screw supply path side of the tip of the extrusion means, an inclined surface is formed such that the rear side is inclined toward the screw supply path side.
Even if the next screw protrudes from the screw supply path and enters the escape cylinder together with the first screw, the inclined surface of the tip of the extrusion means that has been activated to push out the screw will not touch the periphery of the head of the next screw. This is to push the next screws back into the supply channel.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

In FIGS. 1 to 3, reference numeral A indicates a separate supply device for alignment screws. This separating and supplying device A for alignment screws includes a cylindrical escape tube 2 which is provided at the tip of a screw supply path 1 and has an inner diameter slightly larger than the outer diameter of the head of the screws, It is provided with a pushing means 3 for pushing out the leading screws N guided into the escape cylinder 2 toward the front of the escape cylinder 2.

The screw supply path 1 is a path for feeding the screws N arranged in parallel to the tip side by a compressed air flow indicated by a dotted line. ), and the screws N, N, .

The inner diameter of the escape tube 2 is formed to be large enough to allow a single screw to pass through, and one side of the rear end is open to the tip of the screw supply path 1, and the tip can be used as a screwdriver or other tool. It is connected. Further, a compressed air flow is force-fed to the escape tube 2 toward its tip side.

Next, the extrusion means 3 is provided at the rear of the escape cylinder 2 to facilitate feeding the leading screws N guided from the screw supply path 1 into the escape cylinder 2 by means of a compressed air flow. It moves forward and backward along the central axis of the escape cylinder 2, and is usually constituted by a piston rod of an air cylinder device. The extrusion means 3 is arranged such that the center of its tip surface is offset toward the screw supply path 1 side with respect to the central axis P of the escape cylinder 2, and the extrusion means 3 has a distal end located on the screw supply path 1. An inclined surface 4 is formed which engages with the periphery of the head of the next screw that has entered the escape cylinder 2 together with the first screw. This inclined surface 4 has a rear side inclined toward the screw supply path 1 side.

Since the screw separation and supply device A is configured as described above, the screw supply path 1 is connected to the escape tube 2.
When the screws N guided and fed inside are pushed out by the push-out means 3, the push-out means 3 is arranged to be biased toward the screw supply path 1 side from the central axis P of the escape cylinder 2. As shown in a, b, and c, even if the head of the screw N is deformed, eccentric, and non-standard, the tip of the extrusion means 3 is at least at the center of the head of the screw N. It engages with a portion closer to the screw supply path 1 side than the axis. Therefore, as shown in FIG. 4, the screws N are pushed out straight, or at least in an inclined state toward the inner wall of the escape cylinder 2 on the side opposite to the screw supply path 1. In either case, the screws N are reliably pushed forward without getting stuck in the escape cylinder 2, and are further supplied to the tool by the compressed air flow.

Moreover, since the inclined surface 4 is formed at the tip of the extrusion means 3, when the extrusion means 3 operates,
Even if a part of the head of the next screw N on the screw supply path 1 enters the escape tube 2 (indicated by a dotted line in FIG. 4), the inclined surface 4 will prevent the protruding screw N. The screws N are connected to the screw supply path 1 by engaging with the edge of the head.
Push it back to the side. Therefore, the screws N in the screw supply path 1 will not be pushed out at the same time as the screws N in the escape tube 2, and the screws will not become clogged.

Incidentally, it is sufficient that the inclined surface 4 at the tip of the extrusion means 3 is formed at least on the screw supply path 1 side.
It does not necessarily have to be formed on the outer periphery of the tip of the extrusion means 3 as in the above embodiment.

(Effects of the invention) As described above, according to the invention, even if the head of the screw is deformed or the center of the head is eccentric, the shaft of the screw will remain in the same position as the screw. Since the screws are pushed out at an angle to the side wall of the escape cylinder in the opposite direction to the supply path, it is possible to effectively prevent malfunctions such as poor supply and clogging due to the tips of screws entering the screw supply path and falling over. Can be done.

In addition, even if the head of the next screw on the screw supply path enters the escape cylinder, it will be pushed back toward the screw supply path as the screw at the tip of the extrusion means is pushed out. Damage to the heads of the screws and damage to the extrusion means due to interference between the means and the heads of the next screws can be prevented.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the separation and supply device for alignment screws according to the present invention, Fig. 2 is a cross-sectional view taken along the line X-X in Fig. 1, and Fig. 3 is a cross-sectional view taken along the line Y-Y in Fig. 1. , 4th
The figure is an explanatory diagram of the operation mode of the separation and supply device for alignment screws, Figures 5a and b are sectional views of the main parts of the conventional separation and supply device for alignment screws, and Figures 6a, b, and c are standard It is a shape explanatory view of external screws. Code A... Separation supply device for alignment screws, N...
Screws, 1, 10... Screws supply path, 2, 11...
...Escape tube, 3, 12...Extrusion means, 4...
...slanted surface.

Claims (1)

[Scope of utility model registration request] A screw supply path that feeds screws arranged in parallel, and a screw supply path that is arranged at the tip of the screw supply path and is slightly larger than the outer diameter of the head of the screw to accommodate the leading screw on the screw supply path. A cylindrical escape tube having an inner diameter, and a central axis of the escape tube arranged behind the escape tube and for pushing out the leading screws guided into the escape tube from the screw supply path to the front of the escape tube. a rod-shaped extrusion means that can freely advance and retreat along A separation and supply device for aligning screws, characterized in that at least on the screw supply path side, an inclined surface is formed with the rear side inclined toward the screw supply path side.