JPH0726258Y2 - Screw classifying and feeding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention prevents the leading screws aligned with the screw feeding chute from rotating when they are separated by the shutter mechanism and discharged into the escape cylinder. The present invention relates to a device for separating and supplying screws.

(Prior Art) Conventionally, an inclined screw supply chute that has a groove for accommodating a shaft portion of a screw and that supports a lower surface of a head of the screw to feed a plurality of screws in an aligned state, A shutter mechanism arranged at the tip of the screw supply chute and moving the shutter plate in a direction substantially perpendicular to the screw alignment direction to separate the leading screws of the screw supply chute, and an opening at the moving end of the shutter plate. There is known a screw separating / supplying device that is provided with an escape cylinder that receives discharge of the leading screws separated by a shutter mechanism. In a normal case, the screws that have entered the escape cylinder are pressure-fed to the tip of the screwdriver or the like of the screw tightener by a supply device that uses air pressure or the like.

By the way, when supplying relatively short screws (particularly, screws having a dimension shorter than the sum of the diameter of the escape cylinder and the thickness of the shutter plate) by the screw separating and supplying device, the screws escape from the shutter plate. When it is released inside through the screws of the cylinder, the lower surface of the head of the screws rests on the shoulders formed on both side walls of the above-mentioned cylinder, and the screws are suspended in the escape cylinder. Enter. However, since the shoulder portion is slanted toward the escape cylinder side, as shown in FIG.
When the input is discharged from the end of the shoulder portion 7 in the escape cylinder 2, a rotational force acts on the screws, and the screws S make one rotation forward and enter the escape cylinder 2 in an inverted state. May occur. This is because the screws S are short so that the position of the center of gravity is high so that they can rotate easily, and the tip end side of the shaft of the screws S hits both side walls of the screws introduction port 3 to prevent slip resistance. It is considered that this is due to the fact that the heads of the screws precede and that the entire screws tend to incline forward due to the occurrence of. In such a case, since the screws S1 are fed backward, it becomes impossible to tighten the screws.

(Technical problem of the invention) The present invention solves the above-mentioned drawbacks, and in particular, provides a screw separating / supplying device capable of effectively preventing the screws from rotating when being discharged from the shutter mechanism into the escape cylinder. Providing is a technical issue.

(Means for Solving the Problems) In order to solve the above problems, a screw separating / supplying device according to the present invention accommodates a shaft portion of screws and supports a lower surface of a head of screws to support a plurality of screws. And a screw supply chute arranged in an inclined state, and a tip opening part of the screw supply chute that is vertically arranged at a position laterally displaced from the tip opening part of the screw supply chute. Is provided so as to be movable between the escape cylinder having a screw introducing port on the side wall corresponding to the above, the tip opening on the screw supplying chute, and the screw introducing port of the escape cylinder, and the screw supplying is performed during the movement. A shutter having a screw-accommodating groove for accommodating the lead screws sent from the opening of the tip of the chute to support the lower surface of the head of the lead screws and discharging the screws into the inside from the screw introduction port of the escape cylinder. In the screw separating / supplying device including a mechanism, a projection capable of engaging with the head of the screw discharged into the escape cylinder from the shutter mechanism is provided on the inner wall surface of the escape cylinder facing the screw introducing port. At the same time, it is characterized in that an escape portion is formed in the peripheral edge of the screw introduction port to allow passage of the screw engaged with the protrusion.

According to the present invention, the leading screws at the tip of the screw supply chute are separated from other screws by the shutter mechanism, and are further discharged into the escape cylinder. At this time, since the rotational force acts on the above-mentioned head screws, the screws try to rotate, but the head engages with the protrusion formed on the inner wall surface of the escape cylinder, so that the rotation is prevented. Since it is blocked and a rotational force in the opposite direction is applied to the screw pair, the shaft portion of the screws is guided thereby into the escape cylinder. Next, the screws will pass through the escape cylinder, but the screws passage space of the escape cylinder is secured by the relief portion recessed in the peripheral edge of the screws introduction port, so the screws dodge the above protrusions. Is supplied to a predetermined portion in the escape cylinder. In this way, the screws are separated and supplied in a state in which they are always held in the correct posture without clogging, so that the practical effect is very large.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

In the figure, reference numeral A indicates a screw separating and feeding device. The screw separating / supplying device A is arranged at a position which is laterally displaced from a screw supply chute 1 for supplying a plurality of screws S in an aligned state and a tip opening 1a of the screw supply chute 1. A shutter plate 4 movably provided between the escape cylinder 2, the tip opening 1a of the screw supply chute 1 and a screw introduction port 3 formed in the side wall of the escape cylinder 2.
And a shutter mechanism.

The screws supply chute 1 has a screws alignment groove 5 that accommodates the shafts of the screws and supports the lower surface of the head of the screws.
A plurality of screws S housed in the screw alignment groove 5 in an aligned state are arranged so as to be fed downward by gravity.

The shutter mechanism drives the shutter plate 4 arranged at the tip of the screw supply chute in a direction substantially perpendicular to the screw alignment direction by the air cylinder device 4a or the like, and the shutter plate 4 is orthogonal to the moving direction. The screw type accommodation groove 6 is formed in a penetrating state in the direction. The screw receiving groove 6 corresponds to the screw aligning groove 5 of the screw supply chute 1 and is a shaft for receiving the shoulder portion 6a that supports the lower surface of the head of the head screw S and the shaft of the head screw S1. It has a partial housing portion 6b. Further, the shutter plate 4 is provided so that the screws accommodating groove 6 faces the tip end opening 1a of the screws supply chute 1 and the side wall screw introduction port 3 of the escape cylinder 2 at both moving ends thereof. Therefore, when the shutter plate 4 is moved, the head screws S1 sent out from the tip opening 1a of the screws supply chute 1 are accommodated in the screws accommodating groove 6 with their heads supported by the shoulders 6b. Then, it is separated from other alignment screws S and moved to the escape cylinder 2 side.

The escape cylinder 2 is arranged in the up-down direction, and the screws introduction port 3
Is formed on a side wall of the screw supply chute 1 corresponding to the front end opening 1a at a position opposite to the screw housing groove 6 at the moving end of the shutter plate 4. A shoulder 7 that supports the lower surface of the head of the screw is formed on the upper portion of the screw introducing port 3, and is provided so as to be continuous with the shoulder 7. The shoulders 6a of the screws accommodating groove 6 of the shutter plate 4 cause the screws S1 captured by the shutter plate 4 to be discharged into the escape tube 2 from the screws introduction port 3 at its moving end.

Next, in the escape cylinder 2, a rotation preventing projection 9 is formed on the inner wall surface facing the screws introducing port 3, and a relief portion 10 is provided in the peripheral edge of the screws introducing port 3. .

Here, the operation mode of the screw separation and supply device having the above-mentioned configuration,
The case where the screws are discharged from the shutter mechanism into the escape cylinder will be described.

First, as shown in FIG. 1A, when the screws S1 separated by the shutter mechanism are released from the shutter plate 4 into the escape tube 2, the lower surface of the head of the screw S1 is supported by the shoulder portion 7. In this state, the screws introduction port 3 slides down to the escape cylinder 2 side and moves (dotted line in the figure). When the tip of the head of the screws S1 is disengaged from the tip of the shoulder 7, a rotational moment as indicated by an arrow acts on the screws S1, so that the screws S1 move forward as shown in FIG. While rotating in the direction of, it comes off from the shoulder portion 7 and falls in the escape cylinder 2. At this time, the shafts of the screws S1 are returned to the shutter plate 4 side. By the way, the tip side of the head of the screws S1 is engaged with the projection 9 of the escape cylinder 2 to stop the falling while rotating and dropping, and as shown by the arrow, the screw S1 has its shaft portion. Is applied to the escape cylinder 2 side (a dotted line in the figure). After that, the screws S1 fall off the protrusions 9, but as shown in FIG. 6C, the head rear end side of the screws S1 passes through the escape portion 10 of the screw introduction port 3 and the head front end. The side bypasses the protrusion 9 and is dropped and supplied in a normal posture. In the usual case, the escape end of the compressed air is opened in the escape cylinder 2, and the screws that have fallen are further pumped forward by this compressed air and supplied to the driver tip of the screw tightener or the like.

In this way, the screws S1 separated by the shutter mechanism
Can fall in the escape cylinder 2 in a state where the normal posture is maintained without clogging.

[Brief description of drawings]

FIGS. 1 (a), (b) and (c) are explanatory views of the operation mode of the essential parts of the screw separating and supplying apparatus according to the present invention, and FIG. 2 is a partial view of the screw separating and supplying apparatus shown in FIG. ) Is a plan view showing a section taken along line XX, FIG. 3 is an exploded perspective view of the screw separating and supplying device, and FIG. 4 is an explanatory view showing a defect of the conventional screw separating and supplying device. . Reference A: Screw separating / supplying device, 1 ... Screw supplying chute, 1a ... Tip opening, 2 ... Escape tube, 3 ...
Screws introduction port, 4 ... Shutter plate, 6 ... Screws receiving groove, 9 ... Protrusion, 10 ... Relief part

Claims (1)

[Scope of utility model registration request] 1. An inclined screw supply chute for accommodating a shaft portion of screws and supporting a lower surface of a head of the screws to feed a plurality of screws in an aligned state, and the screw supply chute. On the screw supply chute, which is vertically displaced at a position laterally displaced from the tip end opening of the screw supply chute and has a screw type introduction port on a side wall corresponding to the tip end opening of the screw type supply chute. The head of the head screw is provided so as to be movable between the tip opening and the screw introduction port of the escape cylinder, and accommodates the head screw sent from the tip opening of the screw supply chute during movement. In a device for separating and supplying screws, which includes a shutter mechanism having a screw receiving groove for supporting the lower surface of the portion and discharging the screw from the screw introducing port of the escape cylinder to the inside thereof, The inner wall surface of the scape cylinder is formed with a protrusion that can be engaged with the heads of the screws released from the shutter mechanism into the escape cylinder, and the screw engaged with the protrusion is formed on the periphery of the screw introduction port. Separation and supply device for screws, characterized in that a relief portion is formed to allow passage of the screws.