JPH0629089B2 - Screw feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention arranges a large number of screws having a relatively long overall length in a container at random by aligning their heads and then aligning these screws. The present invention relates to a screw supply device that supplies a screw tightener or the like.

(Prior art and its problems) In general, supplying screws one by one to a screw tightening machine is very cumbersome, so loose screws that are randomly stored are aligned and supplied to the screw tightening machine. A device has been proposed, and as such a device, for example, SAIKAI Sho 59-3.
9074 is known.

However, the screw feeding device of the above method has a relatively short overall length and is effective for light screws due to the size of the entire device, blowing air pressure, etc. Was unsuitable.

(Technical problem of the invention) An object of the present invention is to solve the above-mentioned drawbacks and to provide a compact screw supply device capable of aligning and supplying screws having a relatively long overall length and being compact.

(Technical Means for Solving the Problems) In order to solve the above problems, the supply device according to the present invention has a diameter smaller than the length of the screws to be housed and a length larger than the length of the screws. On the side wall of the cylindrical container having a screw discharging port having a size for discharging one screw above the bottom surface of the container, and discharging the screw on the outer wall of the container in a substantially tangential direction of the container. A screw guide which forms a continuous screw discharge path at the outlet and engages with the expanded diameter head of the housing screw on the inner wall of the container to guide and guide the head toward the screw discharge port. In addition to forming the means, an air blowing port for agitating the housing screws along the inner wall surface is formed in the side wall of the container.

(Operation and Effect of the Invention) As described above, according to the screw feeder of the present invention, when the heads of the screws are aligned and housed in the container, and compressed air is blown from the air blowing port, Since the screws are agitated in the circumferential direction on the inner wall of the container by the air pressure, the screws that jump into the discharge port are fed into the screws discharge passage by the blowing pressure of the compressed air. The screw discharge passage is provided in the tangential direction of the container, compressed air is also blown in the tangential direction, the lower end of the screw discharge port is arranged above the bottom surface of the container, and the screw head is guided by the screw means. Since it is configured to be guided to the outlet, the screws can be sorted and aligned easily. Further, since it is not necessary to supply the screws one by one, the interval for the work of inserting the screws is shortened and the efficiency is improved.

Further, since the heads of the screws are accommodated from the beginning, the posture control mechanism for raising the head in an inverted state to align the heads is unnecessary. Therefore, the alignment can be performed more easily, and the entire device can be made simple and compact.

Embodiments Embodiments of the present invention will be described below with reference to the drawings.

In the figure, reference numeral A indicates a screw feeder. This screw supply device A has a screw discharge passage 3 extending in a container 2 that accommodates the screws 1, 1, 1, ... And an air blowing port 4 formed therein. The air is blown into the container 2 to agitate the screws 1, 1, 1 ... Inside the container 2, and the screws are discharged and supplied from the screw discharge passage 3.

The container 2 is formed in a cylindrical shape and has a diameter smaller than the length of the screws 1 to be housed and a length larger than the length of the screws 1 described above. On the side wall of the container 2 is one screw 1
A screw discharge port 5 having a size for discharging is formed. The lower end of the discharge port is formed so as to be apart from the bottom surface 2a of the container 2 and slightly above. A screw guide groove 6 is formed on the inner wall of the container 2 so as to engage with the enlarged diameter head 1a of the housing screw 1 and guide the head 1a so as to face the screw discharge port 5. There is. The screw guide groove 6
Has one end formed at substantially the same height as the head 1a of the screw 1 accommodated therein, the central part formed in a spiral shape, and the other end formed at the receiving part 5a of the screw 1 east part 1a of the screw discharge port 5. It is formed so as to be continuous with (a position higher than the heads of the accommodated screws). Further, an air blowing port 4 for stirring the housing screws 1 along the inner wall surface is formed in the side wall of the container 2.

Next, the screw discharge passage 3 is formed on the outer wall of the container 2 so as to extend substantially tangentially to the container 2. A screw discharge path 3 continuous with the screw discharge port 5 is formed.

In the screw feeder A having the above configuration, first, the heads 1a of the screws 1, 1, 1 ... Next, an air hose 7 is connected to the air blowing port 4 to blow compressed air into the container 2. As a result, the internal screws 1, 1, 1, ... Are agitated along the inner wall surface of the container 2. At this time, of the agitated screws, when the enlarged diameter head 1a of one of the screws 1 engages with the screw guide groove 6,
The head 1a is guided and guided so as to face the screw discharge port 5. The air blown from the air blowing port 4 flows along the inner wall surface of the container 2, and a part of the air is discharged from the screws discharging passage 3 through the screws discharging port 5. Therefore, the screws discharging port 5 The nail 1 that has come into contact with the screw is separated from the other screws 1, 1, 1, ... by the air flow and guided and guided from the screw discharge port 5 to the screw discharge passage 2, and further the screw discharge passage 3 Supplied to the outside. Similarly, the other screws 1 are sequentially supplied from the screw discharge port 5 to the outside guided by the screw discharge passage 3.

Since the lower end of the screw discharge port 5 is provided above the bottom surface 2a of the container 2, the lower end of the screw 1 facing the screw discharge port 5 is the container 2 as shown in FIG. Bottom 2a
Other than screws that are being stirred while they are located above
Since the lower end of the screw contacts the bottom surface 2a and cannot enter the screw discharge port 5, they are not easily entangled with each other, and the separation is surely performed.

In the above example, the screws guiding means is set to the screws guiding groove 6
Although the example formed as is described above, the invention is not limited to this. For example, the inner wall of the container may be formed as a protrusion that engages with the lower surface of the head of the screws.

According to the screw supply device A described above, the screw discharge passage 3 is provided substantially in the tangential direction of the container 2, compressed air is also blown in the tangential direction, and the lower end of the screw discharge port is above the bottom surface of the container 2. In addition, since the heads of the screws are guided to the screw discharge port by the guiding means, the screws can be separated and aligned without difficulty. Further, since it is not necessary to supply the screws one by one, the interval for the work of inserting the screws is shortened and the efficiency is improved.

Further, since the heads 1a of the screws 1 are aligned and housed from the beginning, a posture control mechanism for raising the head in an inverted state and aligning the heads is unnecessary. Therefore, the alignment can be performed more easily, and the entire device can be made simple and compact.

[Brief description of drawings]

FIG. 1 is a perspective view of a screw feeder according to the present invention, FIG. 2 is a sectional view taken along the line XX of FIG. 1, and FIG. It is a figure. Reference symbol A ... Screw supply device, 1 ... Screws, 1a ... Expansion head, 2 ... Container, 3 ... Screws discharge passage, 4 ... Air blowing port, 5 ... Screws discharge Exit, 6 ... Screw guide groove

Claims (1)

[Claims] 1. A screw on the side wall of a cylindrical container having a diameter smaller than the length of the screws to be accommodated and a length larger than the length of the screws above the bottom of the container. A screw discharge port of a size for discharging is opened, and a screw discharge path continuous with the screw discharge port is formed on the outer wall of the container in a direction substantially tangential to the container, and an accommodating screw is formed on the inner wall of the container. And a screw guide means for guiding and guiding the head so as to face the screw discharge port by engaging with the expanded head of the container. An apparatus for supplying screws, characterized in that an air injection port for stirring is formed.