JPH0340818Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention first aligns the shaft parts of the screws housed in the hopper and guides them into the guide groove, and then guides the screws housed in the hopper through the guide groove. The present invention relates to a screw aligning device that separates the screws from the screws, guides them into the screw aligning groove, and aligns them.

(Prior Art and its Problems) Recently, a compact but high-performance screw aligning device as shown in FIGS. 4a and 4b has been proposed and implemented. In this method, mortar-shaped guide walls 2, 2 are formed facing each other inside a disk-shaped screw storage hopper 1, and an air blowing means 3 for stirring is provided on the inner peripheral bottom wall of these guide walls 2, 2. , the shaft portion 6 of the screws 6 along the stirring direction by the air blowing means 3.
A guide groove 4 which is larger than the head part 6a and smaller than the head part 6a is formed as an opening, and an alignment groove 7 having a separator 8 is formed in front of the guide groove 4 in the stirring direction via the guide groove 5. Open the lid and stir the screws 6, 6, 6... housed inside with compressed air blown from the air blowing means 3,
These are guided into the guide groove 4 along the guide walls 2, 2, the shaft portion 6b is dropped into the guide groove 4 to maintain the same posture, and the screws 6, 6, 6, . . . are transferred from the guide groove 5 to the alignment groove 7 and aligned.

However, in the above-mentioned screw alignment device, two screws sometimes enter the guide groove 5 from the hopper in an intersecting manner and become clogged. The state in which the two screws 6, 6 intersect can be considered as one wedge as shown in Fig. It is formed to be equal to the groove width and approximately 1.1d to 1.4d (d is the shaft diameter of the screws), whereas the diameter of the portion P where the two screws 6, 6 are in contact with the wedge is
2d, the wedge cannot enter into the guide groove 5 which is narrower than this diameter and becomes clogged. If the screws 6, 6 become clogged, not only does it take a lot of effort to remove them, but also the work of screwing in the screws is delayed, so it has been desired to eliminate the clog as described above.

(Technical Problems of the Invention) The present invention aims to solve the above-mentioned drawbacks and provide a screw alignment device that can prevent screws from clogging guide grooves and reliably supply screws in an aligned manner. This is a technical issue.

(Means for Solving the Problems) In order to solve the above problems, the screw aligning device according to the present invention includes opposing guide walls having a dovetail cross section formed along the inner periphery of a disk-shaped screw storage hopper.
A guide groove smaller than the head of the screw and larger than the shaft is formed in a part of the outer periphery of the guide wall, and an alignment groove is continuously formed in the guide groove via the guide groove in the stirring direction of the screw. The groove is formed with a groove part continuous with the guide groove and a guide recess having a size to accommodate the head of a screw, and the alignment groove is formed with a groove part and a guide recess respectively continuous with the groove part of the guide groove and the guide recess part. In the screw aligning device in which the alignment groove and the hopper are defined by a separator, the groove width of the guide groove and the groove portion in the vicinity thereof is larger than the groove width of the guide groove and the groove portion of the alignment groove. It is characterized in that it is formed wide and the length of the wide groove is approximately equal to the length of the shaft of the screw.

(Operations and effects of the invention) According to the above-described configuration, the screws housed in the hopper are stirred, guided along the guide wall to the guide groove, and the shaft portion is dropped into the guide groove to perform the same operation. In this case, the two screws may jump into the guide groove or the guide recess in a crossed state. However, in this case, since the groove part of the guide groove and the vicinity thereof are formed wide, the crossed screws fall into the guide recess and further hit other screws rotating in the hopper, and the separator. The overlapping state of the screw shafts is easily released by the shock that hits the end of the screw, and the shafts become free. As a result, the screws are transferred into the alignment groove and aligned without becoming jammed. Note that since the wide groove is formed to be approximately equal in length to the shaft portion of the screw, the screw does not become clogged within the guide groove. Therefore, the practical effects of the present invention are very large.

(Example) Hereinafter, a screw aligning device according to the present invention will be explained with reference to the drawings.

In FIG. 1, reference numeral A indicates a screw alignment device. The basic configuration of this screw alignment device A is almost the same as the conventional one, and consists of two plate-shaped plates A1 and A.
2, and guide walls 2, 2 each having a mortar-shaped cross section are formed facing each other along the inner periphery of the disc-shaped screw storage hopper 1, while the outer peripheral bottom wall of these guide walls 2, 2 is is provided with an air blowing means 3 for stirring connected to an external air source (not shown), and a guide groove is provided on a part of the outer periphery of the guide walls 2, 2 along the stirring direction by the air blowing means 3. 4 (see FIG. 2a), and has a groove 5a continuous to the front of the guide groove 4 in the stirring direction, and opens to the hopper 1 on the opening side of the groove 5a, and has a head of the screw 6. A guide groove 5 (see figure b) is provided, which has a size to accommodate the screws 6a and a guide recess 5b that supports the lower surface of the head 6a of these screws 6. The alignment groove 7 (see figure c) having a groove 7a and a guide groove 7b that are continuous to the guide groove 5a and the guide groove 5b, respectively, is continuously formed, and the guide groove 4, the guide groove 5, and the grooves 5a, 7a of the alignment groove 7 are formed continuously. The groove width is formed to be larger than the shaft portion 6b of the screw type 6 and smaller than the head portion 6a. Note that the alignment groove 7 and the hopper 1 are defined by a separator 8.

In the alignment device A, metal members 10 such as steel are applied to the opening edges of the guide grooves 4, 5, and grooves 5a, 7a of the alignment grooves 7, and the other parts are made of plastic.

Next, the groove width of the groove portion 5a of the guide groove 5 and its vicinity is made wider than the groove width of the groove portion 7a of the guide groove 4 and the alignment groove 7 by widening only one side of the groove wall. Moreover, the length of this wide groove 11 is formed to be approximately equal to the length of the shaft portion 6b of the screw type 6. Note that the groove width of the wide groove 11 is formed to be smaller than twice the width of the shaft portion 6b of the screw type 6.

Since the screw sorting device A is constructed as described above, the loose screws 6, 6, 6, etc. housed in the hopper 1 are blown out from the air blowing means 3 opened in the hopper 1. Stirred by compressed air. The stirred screws 6, 6, 6... are inserted into the guide groove 4 along the guide walls 2, 2 with their heads 6a, 6a, 6.
It is dropped so that a... are aligned and in the same posture. The compressed air from the air blowing means 3 is blown along the inner peripheral bottom wall of the hopper 1 and also into the guide groove 4, so that the agitated screws 6 are blown by the compressed air. It is transferred to the guide groove 5. Here, the head 6a of the screw 6 is connected to the guide groove 5.
The lower surface of the guide recess 5b is supported by the stepped portion 12 of the guide recess 5b. The shaft portion 6b of the screw 6 is held as it is within the groove portion 5b.
Further, the screws 6 are transferred to the alignment groove 7 with the screw heads 6a supported on the stepped portion 12 by the compressed air. Since the opening surface of the head accommodation guidance recess 5b of the screws 6 in the alignment groove 7 is closed by the separator 8, the screws 6 in the hopper 1
is separated from the screws 6 in the hopper 1, and the alignment groove 7
The robots are transported forward in a lined-up state. In normal cases,
In front of the alignment groove 7, there are provided a separation supply device 13 for separating the alignment screws 6 one by one and a supply pipe 14 for supplying the separated screws 6 to a nailer, screw driver, etc.

By the way, in the alignment device configuration described above, the guide groove 4
is formed smaller than the head 6a of the screws 6 and larger than the shaft portion 6b, so it is difficult for the two screws 6 to enter the guide groove 4 in a crossed state, but it is possible. On the other hand, since the guide recess 5b of the guide groove 5 is formed larger than the head 6a of the screws 6, the two screws 6 in the hopper 1,
6 may jump into the guiding recess 5b in a crossed state. In either case, since the groove portion 5a of the guide groove 5 and the vicinity thereof are formed wide, the crossed screws 6, 6 fall into the guide recess 5b, and other screws rotating in the hopper 1 6 or the end of the separator 8, the crossed state of the shaft portions is easily released, and the shaft portions become free. As a result, the screws 6, 6 are transferred into the alignment groove 7 and aligned without becoming clogged.
Furthermore, since the wide groove 11 is formed to be approximately equal in length to the shaft portion 6b of the screw 6, clogging in the guide groove 5 is effectively prevented.

Note that the wide groove 11 in the guide groove 5 is
The configuration is not limited to expanding only one side of the groove wall in the vicinity thereof, but may be a configuration in which both sides of the groove wall are expanded.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of a screw alignment device according to the present invention, and FIGS. 2 a, b, and c are guide grooves,
3 is a cross-sectional view of the guide groove and the alignment groove, and FIG. 3 is an explanatory diagram of the state in which the screws come out of the crossed state in the screw aligning device, and FIGS. 4 a, b, and c are cross-sectional views of the conventional screw aligning device, respectively. FIG. 2 is a diagram, a vertical cross-sectional view, and an explanatory diagram of a state in which screws are clogged. Code A...Screw alignment device, 1...Hopper, 2
... Guide wall, 3 ... Air blowing means, 4 ... Guide groove, 5 ... Guide groove, 5a, 7a ... Groove section, 5
b, 7b...Guiding recess, 6...Screws, 6a...
Head, 6b...Shaft, 7...Alignment groove, 11...Wide groove.

Claims (1)

[Claim for Utility Model Registration] Guide walls with a dovetail cross section are formed oppositely along the inner periphery of a disc-shaped screw accommodating hopper, and a shaft portion smaller than the head of the screw is formed on a part of the outer periphery of the guide wall. A larger guide groove is formed, and an alignment groove is continuously formed in the guide groove via the guide groove in the stirring direction of the screws, and the groove part continuous to the guide groove and the head of the screw are accommodated in the guide groove. A guide recess having a certain size is formed, and the alignment groove is formed with a groove and a guide recess that are continuous with the groove of the guide groove and the guide recess, respectively, and the alignment groove and the hopper are defined by a separator. In the screw aligning device, the groove width of the guide groove and the groove portion in the vicinity thereof is formed wider than the groove width of the guide groove and the groove portion of the alignment groove, and the length of the wide groove is set to the axial portion of the screw. A device for aligning screws, characterized in that the length of the screws is approximately equal to the length of the screws.