JPH0629088B2 - Screw feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention randomly arranges a large number of screws having a relatively long length in a storage container with their heads aligned and then aligns these screws. The present invention relates to a screw supply device for supplying a screw tightening machine or the like.

(Prior art and its problems) Generally, it is very troublesome to supply screws one by one to a screw tightening machine, etc., so randomly packed loose screws are aligned and supplied to the screw tightening machine. A feeding device has been proposed, and as such a device, for example, SAIkai 59-
No. 39074 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. Further, if screws are excessively loaded, misalignment may occur.

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

(Technical means for solving the problem) In order to solve the above problems, the supply device according to the present invention has an outer cylindrical container and an inner cylindrical container housed in the outer cylindrical container, The inner cylindrical container has a diameter smaller than the length of the screws to be housed and a length larger than the length of the screws, and a side wall of the container ejects one screw above the bottom surface. A screw guide means for opening a screw discharge port having a size corresponding to the above-mentioned size, and engaging an enlarged-diameter head portion of the accommodating screw on an inner wall of the screw guide port so as to guide the head toward the screw discharge port. On the other hand, the outer cylindrical container is formed with a screw discharge path corresponding to the screw discharge port of the inner cylindrical container, and the inner cylindrical container and the outer cylindrical container are interposed by a positioning means. Almost at the screw outlet of the inner cylindrical container. It is characterized in that the outer cylindrical container is housed so that the screw discharge passages are continuous in the line direction.

(Operation and Effect of the Invention) As described above, according to the screw supply device of the present invention, after the heads of the screws are housed in the inner cylindrical container by aligning the heads of the screws in the inner / outer dual device, the inner parts are inserted from the outside. When compressed air is blown into the cylindrical container, the air pressure causes the screws to stir in the inner wall of the inner cylindrical container in the circumferential direction, so the screw that jumps into the discharge port is the compressed pressure of the compressed air. Is fed into the screw discharge path. The screw discharge path is provided almost in the tangential direction of the cylindrical container, compressed air is also blown in the tangential direction, and the lower end of the screw discharge port is arranged above the bottom surface of the inner cylindrical container. Since the head is configured to be guided to the screw discharge port by the guiding means, the screws can be sorted 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 of the screws and the like are housed in the inner cylindrical container from the beginning, the attitude 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.

Furthermore, if the screws are stored in the inner cylindrical container with the heads aligned in advance, and the screws are sold with the screw discharge port closed, the user can store them in the outer cylindrical container. A screw feeder can be configured. Further, in this case, since it is possible to manage the proper number of nails to be stored in the inner cylindrical container, there is no risk of misalignment,
Good screws can always be supplied.

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. In this screw feeder A, the inner cylindrical container 10 is replaced by the outer cylindrical container 2
It has a double structure housed in 0.

The inner cylindrical container 10 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, and a size for discharging one screw 1 on its side wall. The screw discharge port 5 is opened. The lower end of the discharge port is formed so as to be apart from the bottom surface 10a of the inner cylindrical container 10 and slightly above. Further, on the inner side of the inner cylindrical container 10, a diameter-expanding head 1a of the accommodation screws 1 is provided.
Is formed with a screw guide groove 6 that guides the head 1a so as to face the screw discharge port 5. One end of the screws guide groove 6 is formed at substantially the same height as the head 1a of the accommodated screws 1, the central part is formed in a spiral shape, and the other end is formed in the screws 1 of the screws discharge port 5. It is formed so as to be continuous with the receiving portion 5a of the head portion 1a (higher than the accommodated screw head portion). Further, the inner cylindrical container 10
An air blow-in port 4 for stirring the accommodation screws 1 along the inner wall surface is formed in the side wall of the.

Next, the inner cylindrical container 10 is attached to the outer cylindrical container 20.
A screw discharge path 2 and an air supply unit 3 (air hose connected to a compressed air supply source) corresponding to the screw discharge port 5 and the air blowing port 4 are formed. The screws discharge passage 2 is formed so as to extend substantially tangentially to the discharge port 5 of the inner cylindrical container 10.

Bottom surface of inner cylindrical container 10 and outer cylindrical container 20
Engaging projections 7 and engaging recesses 8 are formed on the upper surface of the bottom of each. Then, the engagement protrusion 7 and the engagement recess 8 are engaged with each other so that the screws 5 of the inner cylindrical container 10 are discharged.
The screw discharge passages 2 of the outer cylindrical container 20 are positioned so as to be continuous in a substantially tangential direction. The positioning means is not limited to the engagement between the protrusion and the recess. Other known means may be used.

In the screw supply device A having the above configuration, first, the inner cylindrical container 10 is housed in the outer cylindrical container 20. Next, the heads 1a of the screws 1, 1, 1 ... Are aligned and housed in the inner cylindrical container 10. Next, compressed air is blown into the air blowing port 4 from the air supply unit 3. As a result, the internal screws 1, 1, 1, ... Are agitated along the inner wall surface of the inner cylindrical container 10. At this time, of the stirred screws,
When the enlarged diameter head 1a of one of the screws 1 is engaged 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 inner cylindrical container 10, and part of the air is discharged from the screws discharging passage 2 through the screws discharging port 5, The screws 1 facing the discharge port 5,
Separated from the other screws 1, 1, 1, ... by the air flow, and guided from the screw discharge port 5 to the screw discharge path 2 and further in an outer cylindrical shape continuous to the screw discharge port 5. It is supplied to the outside from the screw discharge passage 2 of the container 20.
Similarly, other screws are sequentially supplied from the discharge port 5 to the outside guided by the screw discharge passage 2.

Since the lower end of the screws discharge port 5 is provided above the bottom surface 10a of the inner cylindrical container 10, the lower end of the screws 1 facing the screws discharge port 5 is, as shown in FIG. The inner cylindrical container 10 is located above the bottom surface 10a, while the lower ends of the other screws 1 that are being agitated are in contact with the bottom surface 10a and cannot enter the screw discharge port 5. Tangles are less likely to occur, and separation is ensured.

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 2 is provided substantially in the tangential direction of the inner cylindrical container 10, compressed air is also blown in the tangential direction, and the lower end of the screw discharge port 5 is formed in the inner cylinder. Since it is arranged above the bottom surface of the container 10 and the heads of the screws are guided to the screw discharge port 5 by the guiding means, the screws can be separated and aligned without difficulty. And since it is not necessary to supply screws one by one, the interval for screwing work etc. becomes small,
Efficiency improves.

Further, since the heads of the screws and the like are housed in the inner cylindrical container 10 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.

Further, the screw supply device A is provided with the inner cylindrical container 10
Since the outer cylindrical container 20 and the outer cylindrical container 20 have a separable double structure, the screws 1, 1, 1, ... Are stored in the inner cylindrical container 10 with the heads aligned in advance, and the screws are discharged. If the outlet 5 is sold in a closed state, the user can construct a screw supplying device by storing and arranging it in the outer cylindrical container 20. Further, in this case, since it is possible to manage the proper number of screws to be accommodated in the inner cylindrical container 10,
It is possible to always supply good screws without causing misalignment.

[Brief description of drawings]

FIG. 1 is a perspective view of a screw feeder according to the present invention, FIG. 2 is a perspective view showing a state where an inner cylindrical container and an outer cylindrical container are separated, and FIG. 3 is a plan view of the screw feeder. FIG. 4 is a cross-sectional view, and FIG. 4 is an explanatory view of the separated state of the screws at the screws outlet. Reference symbol A ... Screw supply device, 1 ... Screws, 1a ... Expanding head, 2 ... Screw discharge path, 3 ... Air supply part, 4 ...
… Air injection port, 5 …… Screw outlet, 6 …… Screw guide groove, 10 …… Inner cylindrical container, 20 …… Outer cylindrical container

Claims (1)

[Claims] 1. An outer cylindrical container and an inner cylindrical container housed in the outer cylindrical container, the inner cylindrical container having a diameter smaller than the length of the screws to be housed therein. A screw discharge port having a length larger than the length of the above screws and having a size for discharging one screw above the bottom surface is opened on the side wall of the screw, and the inner wall of the screw is accommodated. While forming a screw guide means for engaging the expanded diameter head and guiding the head so as to face the screw discharge port,
The outer cylindrical container is formed with a screw discharge path corresponding to the screw discharge port of the inner cylindrical container, and the inner cylindrical container and the outer cylindrical container are substantially aligned with each other through a positioning means. A screw supply device, characterized in that the screw discharge path of the outer cylindrical container is housed so as to be continuous in the tangential direction at the screw discharge port of the cylindrical container.