JPH0340815Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is a screw alignment method that aligns the heads of screws housed in a hopper and then guides them into a screw alignment passage via a guiding part. The present invention relates to a screw alignment device that can be used commonly for different types of screws.

(Prior art and its problems) Recently, as a small and high-performance screw alignment device,
Something like the one shown in Figure 6a has been proposed and implemented. This is a disc-shaped screw-accommodating hopper 1 in which pin-shaped guide walls 2, 2 are formed facing each other, and a hole smaller than the head N1 of the screw N is formed between the circumferential ends of these guide walls 2, 2. A guide groove 3 larger than the shaft portion N2 is formed by opening inward of the hopper 1,
Further, the guide groove 3 is continuously formed in the screw alignment passage 5 of the magazine section 6, and air blowing means 10 for stirring the screws N into the rear end of the guide groove 3 is provided.
It has been established. And the lid 1a of hopper 1
The screws N accommodated therein are stirred by the compressed air blown from the blowing means 10, and the screw heads N1 are inserted into the open ends of the guide grooves 3 along the guide walls 2, 2. are engaged, and the shaft part N2 is dropped into the guide groove 3 to maintain the same posture. Furthermore, they are transferred by the compressed air to the screw alignment passage 5 through the guide part 4 and aligned, and are moved forward. It is used for pressure feeding. Screw alignment passage 5 and hopper 1
is defined by a separator 8, and like the guide groove 3, the alignment passage 5 is defined by a separator 8, as shown in FIG.
A flat support surface 7 that supports the lower surface of the screw head N1
and a drop groove 5a of the shaft portion N2.

By the way, as shown in FIG. It was formed by removing a triangular pyramid-shaped portion having vertices at the lower part of the separator 8 and points R and S in front of it at the edge portion 9 between the guide wall 2 and the guide groove 3. however,
With such a shape, there is no particular problem in the case of a screw with a cross section of the head like the countersunk head screw N shown in figure d, but if the lower surface of the head is the same as in the pan head screw or hexagonal head screw shown in figure e, In the case of wide screws N, the peripheral edge of the lower surface is the edge part 9 of the guide wall 2 of the guide groove 3.
Since the screw head N1 is supported above the countersunk screw, the upper surface of the screw head N1 is higher than that of a countersunk screw, and when the screw N1 guided to the guiding part 4 is transferred into the screw alignment passage 5, Then, the head N1 may get stuck and the screw may become jammed. Therefore,
It was not possible to share the screw alignment passage with the above configuration for different types of screws.

(Technical Problems of the Invention) The purpose of this invention is to solve the above-mentioned problems and to propose a screw alignment device that can be used commonly for different types of screws.

(Means for Solving the Problems) In order to solve the above-mentioned problems, this invention forms opposing guide walls with a dovetail cross section along the inner periphery of a disk-shaped screw storage hopper, and the outer periphery of the guide walls. A guide groove smaller than the head of the screw and larger than the shaft part is formed in a part, and a screw alignment passage is continuously formed in the guide groove through the guide part, and the screw alignment passage is provided with the head of the screw. In the screw aligning device, the screw aligning device forms a head support surface that supports the lower surface from both sides of the shaft portion, and defines the screw aligning passage and the hopper by a separator, the tip of the separator facing the guiding portion. is arranged on an extension of the edge between the guide wall and the guide groove, and the guide wall is cut out over a range where the head of at least one screw is accommodated in the guide part. At the same time, a screw head receiving surface is formed at the bottom of the screw guiding recess that is continuous with the head support surface of the alignment screws in the screw alignment passage, and the screw head receiving surface is supported by the edge portion. The lower surfaces of the heads of the aligned screws are further supported and aligned on the screw head receiving surface of the screw guiding part and the head supporting surface of the screw aligning passage.

(Operations and effects of the invention) According to the above configuration, when the screws in the hopper are stirred and rotated, the tip of the separator facing the guide section is moved to the edge between the guide wall and the guide groove. By arranging it on an extension of the separator, screws in an abnormal position are less likely to hit the tip of the separator, making their rotational movement smoother, and the heads of screws in an abnormal position are less likely to hit the tip of the separator. However, the head can be popped out to prevent clogging. Therefore, the efficiency of stirring the screws is high. In addition, screws that have entered the guide groove reach a guiding portion formed just before the tip of the separator, and the screw guiding recess is sized to accommodate the head of at least one screw. Because of this, the screws in the guide groove are guided to the guiding part regardless of the shape of the head of the screw, and the lower surface of the head is supported by the screw head receiving surface formed at the bottom of the guiding recess. Ru. Since the screw head receiving surface is continuous with the screw head support surface in the screw alignment passage, the screws in the guiding part are further guided and aligned in the screw alignment passage.

As described above, this invention can be used commonly for different types of screws with different head shapes, so it has a very large practical effect.

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

In FIGS. 1 to 4, reference numeral A indicates a screw aligning device. The basic structure of this screw aligning device A is the same as the conventional one, with a disk-shaped screw accommodating hopper 1, a guide wall 2 having a mortar-shaped cross section along the inner periphery,
2 are formed facing each other, while these guide walls 2, 2
A guide groove 3 smaller than the head N1 of the screw N and larger than the shaft N2 is formed in a part of the outer periphery of the hopper 1 by opening inward of the hopper 1. A magazine section 6 having a screw alignment passage 5 is arranged in series.

Next, as shown in FIG. 2, the guide section 4 is composed of a screw guide recess 4a and a screw head receiving surface 4b formed at the bottom thereof. The screw guiding recess 4a has a head N1 of at least one screw N.
The screw head receiving surface 4b is formed by cutting out the guide wall 2 over the range in which the screws are accommodated, and the screw head receiving surface 4b is a head support surface 7 that supports the lower surface of the head of the alignment screw N in the screw alignment path 5 from both sides. It is formed in a continuous manner. In this case, the tip 8a of the separator 8 is arranged on an extension of the edge 9 between the guide wall 2 and the guide groove 3.

Since the screw aligning device is constructed as described above, the loose screws N accommodated in the hopper 1 are agitated by the compressed air blown from the blowing means 10 opened in the hopper 1. , the heads N1 are aligned and dropped into the guide groove 3 along the guide walls 2, 2 so as to have the same posture. Furthermore, these are guided into the guide recess 4a of the guide section 4 by the compressed air.
guided by. At this time, as shown in FIGS. 3 and 4, since the screw guiding recess 4a is formed to a size that accommodates the head N1 of at least one screw N, a flat head screw, a pan head screw, etc. Regardless of the head shape of screws, hexagonal head screws, etc., the alignment screws N supported by the edge part 9 between the guide wall 2 and the guide groove 3 are guided to the guide part 4, and the lower surface of the head N1 is supported by a screw head receiving surface 4b formed at the bottom of the guiding recess 4a. Since the screw head receiving surface 4b is continuous with the head support surface 7 of the screw alignment passage 5, the screws N are smoothly screwed by the compressed air without their heads getting caught in the separator 8. and is fed under pressure to the sorting passage 5.

Furthermore, by arranging the tip 8a of the separator 8 on the extension of the edge 9 between the guide wall 2 and the guide groove 3, screws in an abnormal posture are less likely to collide with the tip 8a of the separator. The rotational movement becomes smooth, and although the head of a screw in an abnormal posture may hit the tip 8a of the separator, the head can be ejected and clogging can be prevented. Therefore, the efficiency of stirring the screws is high.

Note that the shape of the guiding portion 4 is not limited to that shown in FIGS. 2 and 3. For example, as shown in FIG. 5, the edge portion 9 between the guide wall 2 and the guide groove 3 and the screw head support surface 7 of the screw alignment passage 5 are formed at the same level, and the screw guiding recess is formed. 4a is formed by cutting out the guide wall 2 over a range in which the head of at least one screw is accommodated, and the screw head receiving surface 4b is continuous with the head support surface 7 of the screw N. It may also be a configuration in which it is formed as follows.

[Brief explanation of drawings]

Fig. 1 is a central vertical sectional view of the side surface of the screw aligning device according to this invention, Fig. 2 is a perspective view of the screw guiding section of the screw aligning device, and Fig. 3 is a view of the screws in the upper screw guiding section. Perspective views showing the transfer state, Figures 4a, b, and c are X-X, Y-Y, and Z-Z in Figure 2.
5 is a perspective view of another example of the screw guide section of the above-mentioned alignment device, and FIGS. 6a and 6b are a central vertical sectional view and a horizontal sectional view of the conventional screw alignment device. , Figure c is a perspective view of the screw guiding section of the screw aligning device, and Figures d and e are cross-sectional views showing how the guiding section supports the screws. Code A...Screw alignment device, N...Screws, N
1...Head, 1...Hotsupa, 2...Guide wall, 3
...Guide groove, 4...Guiding part, 4a...Screw guiding recess, 4b...Screw head receiving surface, 5...Screw alignment passage, 6...Magazine part, 7...Screw head part support surface, 8... separator, 9... edge part.

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 a screw alignment passage is continuously formed in the guide groove through a guiding part, and a head support is provided in the screw alignment passage to support the lower surface of the head of the screw from both sides of the shaft part. In a screw aligning device in which the screw aligning passage and the hopper are defined by a separator, the distal end of the separator facing the guide section is connected to the edge between the guide wall and the guide groove. A screw guide recess is formed in the guiding part by cutting out the guide wall over a range in which the head of at least one screw is accommodated, and A screw head receiving surface that is continuous with the head support surface of the alignment screws in the screw alignment passage is formed at the bottom of the type guiding recess, and the lower surface of the head of the alignment screws supported by the above-mentioned edge part is further connected to the screw type. A screw aligning device characterized in that the screws are aligned by being supported on a screw head receiving surface in a guiding part and a head supporting surface of a screw aligning passage.