KR100186957B1 - Screw selecting apparatus - Google Patents

Abstract

In order to provide a screw sorting device which can check the head specification defect of the formed screw and the thread forming in succession, the screw S introduced into the hopper 16 is transferred to the vibration trough 18 of the electronic feeder 20. A screw supply unit 10 which receives the stay and automatically administers it to the next process whenever necessary; When the screw S accommodated therein is climbed on the guide channel 30 and the sorting channel 32 passes only a certain posture, the first black screw Sr passed through passes the pair of screw checkers 34. A part feeding part 12 which selects only the first black screw Sr of which the thread part molding is regular through and leads to the next step; The first diameter reducing surface 52 is formed by passing the primary black screw Sr between the pair of two pairs of sorting rollers 42 arranged to rotate in opposite directions on the upper surface of the base 58 arbitrarily arranged to be tiltable. Only the screw (S) of the head standard is normal by the interval between it consists of the standard sorting unit 14 is separated and collected through the chute (78).

Description

Screw sorting device

1 is a perspective view showing the overall configuration of a screw sorting apparatus according to the present invention.

2 is a side cross-sectional view of the electron feeder applied to the screw supply of the present invention.

3 is a perspective view illustrating a process in which a bad posture set screw is removed through a selection channel of a part feeder in the present invention.

4 is a cross-sectional view taken along the line A-A of FIG.

Figure 5 is a perspective view showing a process of sorting the screw thread defective screw through the end of the exit of the part feeder in the present invention.

6 is a plan view showing an arrangement structure of a sorting roller that is applied to a standard sorting unit of the present invention to sort out a poor head specification;

7 is a cross-sectional view taken along line B-B in FIG.

FIG. 8 is a side view showing an expected supporting structure of the standard sorting unit shown in FIG.

Fig. 9 is a partial perspective view showing the mounting structure of the end gate of the chute arranged under the base of the standard sorting unit and collecting genuine screws.

* Explanation of symbols for main parts of the drawings

10: screw supply part 12: part feeding part

14: standard sorting unit 16: hopper

18: Vibration Trough 20: Electronic Feeder

22: main valve 24: air nozzle

26: parts feeder 28: touch switch

30: guide channel 32: selection channel

34: thread checker 36: bracket

38: downhill suit 40: guider

42: sorting roller 44: motor

46: Timing Belt 48: Pinion

50: end 52: first diameter reducing portion

54: second diameter reducing portion 56: stopper

58: expected 60: journal bearing

62: adjuster 64: slot

66: Bolt 68: Floor

70: base support 72: support

74: arm 76, 78, 80: chute

82: gate 84: lever

86: spring S: screw

Sm: Primary black screw Sr: Bad screw

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw sorting apparatus, and more particularly, to a screw sorting apparatus which is capable of automatically checking and removing the head specification defect, thread forming defect, and the like of a manufactured screw.

Widely used as fastening elements for various parts, the screw is cut into a certain length at the same time as the head is molded at one end while the steel wire cut to a certain length passes through the header, and the screw material is rolled again. When passing through a roll cutter, a thread is formed on the outer circumference and formed into a desired screw. The screw thus manufactured may be chrome or zinc plated outside through a plating process.

The defects appearing in the manufactured screw are the specification of the head, the molding failure of the thread, the molding twist of the spiral, and the like. For example, the head size is that when the cross-shaped groove formed in the head portion is inscribed shallowly, the shaped head is not fully compressed so that the diameter is less than the size, and if the shape is too deep, the diameter is over. In addition, the failure of the specification of the head may appear even if the head is plated with foreign matter on the head surface in the plating process.

In addition, the thread molding failure is the main cause of the tolerance increase due to the wear of the roll cutter, and when the posture of the screw material supplied between the roll cutters is improper, it is thrown out and becomes unthreaded or the thread is partially molded. Occurs as

The defective screw as described above needs to be sorted in advance before shipping. In the prior art, the defect screening of the screw was identified by the operator's naked eye, and thus the workability was not good and it was not efficient.

Other methods are known which rely on mechanical means, which are spaced apart from each other at regular intervals, with the screw passing through between a pair of rollers of different diameters forming the intermediate stages. It is a method of sorting by dropping down.

In this method, only the head size of the screw can be selected, and the molding failure of the thread, which is another cause of the defect, still has to be selected depending on the naked eye.

The present invention is to solve the problems inherent in the conventional screw sorting apparatus as described above, the purpose of the screw sorting that can automatically check whether the screw of the head standard bad and the screw molding failure continuously In providing the device.

The present invention for realizing the above object is a screw supply unit for receiving the screw injected into the hopper as a vibration trough of the electronic feeder to stay and automatically administer to the next step whenever necessary; The screw accommodated inside is climbed on the guide channel, so that only a certain posture passes through the sorting channel, and the first black screw passed through is only a first black screw with regular thread forming via a two-threaded screw checker. A part feeding part which selects and leads to a next process; Only the screw whose head size is normalized by the interval between the first diameter reduction surfaces by passing the primary black screw between a pair of sorting rollers arranged to rotate in opposite directions on the upper surface of the base arbitrarily arranged to be inclined adjustable. It consists of a standard sorting section which is collected separately through this chute.

In the above-described configuration, a touch switch extending from the outside of the hopper is disposed inside the part feeder so as to control the operation timing of the electronic feeder.

In addition, the screw checker is composed of a pair of facing up and down is configured to be engaged with the thread formed on the outer periphery of the screw passing through the sorting channel.

Preferred embodiments of the present invention described above will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view of a screw sorting apparatus according to the present invention, which shows a configuration comprising a screw supply section 10, a part feeding section 12, and a standard sorting section 14. As shown in FIG.

The screw supply unit 10 has a hopper 16 disposed on an upper side thereof, and a vibration trough 18 extends in a horizontal direction below the hopper 16 so as to be in contact with the part feeding unit 12. Since the lower portion of the hopper 16 is opened as shown in FIG. 2, screws (not shown) introduced through the hopper 16 are stacked on the upper surface of the vibration trough 18. The vibration trough 18 is supported by an electromagnetic feeder 20 having a leaf spring that is excited by an electromagnet, and is horizontally vibrated every 60 cycles per second by the action of an alternating magnetic field generated by being excited by an alternating current power source.

When the vibration trough 18 is horizontally vibrated, the screw supplied to the upper surface of the vibration trough 18 falls to the part feeding part 12 and is supplied by a predetermined amount.

The part feeding part 12 is equipped with the part feeder 26 by which the air nozzle 24 whose air volume is controlled through the main valve 22 is arrange | positioned adjacent to the exit side.

The part feeder 26 exemplified in this embodiment includes a structure having a bowl which is electromagnetically vibrated like the conventional part feeder, and an alignment mechanism extending spirally along the upper side from the inner circumferential surface thereof to the outlet side. In addition, the air nozzle 24 continuously blows air of a predetermined pressure so that the screw being moved to the outlet side is piggybacked on the air flow to change the posture or path.

On the other hand, a touch switch 28 extending from the outside of the hopper 16 is disposed inside the part feeder 26 to control the operation timing of the electronic feeder 20.

That is, when the remaining amount of screws in the parts feeder 26 is reduced to a certain level or less, the touch switch 28 is switched on and the electronic feeder 26 is activated to move the screws into the parts feeder 26. Resupply of this screw is continued until touch switch 28 is reversed to switching off.

In the section extending from the inner circumferential surface of the parts feeder 26 to the upper outer circumference, an alignment mechanism defined by the guide channel 30 and the sorting channel 32 is disposed in the present invention. These alignment mechanisms are arranged in two rows in this embodiment, but may be arranged in one row.

The guide channel 30 is shown in a straight line for convenience of description in FIG. 3, which forms a ramp formed in a substantially V-shape up to a section through which the last air nozzle 24 is disposed. The screw (S) to be mounted on the back is guided together with the right fit in the guide channel 30, the disperse and scattered around.

On the other hand, after the guide channel 30 is converted into a narrowing sorting channel 32 is extended. For this reason, only the screw S, which is correctly inserted and guided, is turned over to the sorting channel 32, and the disturbance to the periphery falls back into the part feeder 26 again. In this process, the airflow sprayed through the air nozzle 24 propels the screw S scattered around the sorting channel 32 so as to be dropped into the parts feeder 26.

Since the sorting channel 32 has a groove-shaped passage as shown in FIG. 4, the threaded portion of the screw S is received therein and the head is guided with the posture protruding outward.

The sorting channel 32 ultimately defines the outlet of the part feeder 26 as shown in FIG. At the outlet of the part feeder 26, the sorting channel 32 is arranged to open in a substantially horizontal direction, so that the screw S moving on it is in a laterally inverted position. Therefore, the barrier 32a for preventing the fall of the conducted screw S should be provided in the sorting channel 32 connected to the pull side.

The screw checker 34 which has a part facing up and down is arrange | positioned in two sets at the position which is continuous with the said selection channel 32. As shown in FIG. If the guide channel 30 and the sorting channel 32 are arranged in one row, the screw checker 34 is also arranged.

The screw checker 34 is actually opposed to a portion extending downward from the upper side of the bracket 36 fixed to the part feeder 26 and protruding upward from the bottom of the bracket 36. It consists of parts.

The screw S passing through the sorting channel 32 passes through a pair of screw checkers 34 to check whether the threads are correctly formed.

That is, the thread is correctly formed, the thread is inserted between the screw checker 34, passed through the electric movement and sorted by the primary black screw (Sr), the screw is missing or poorly molded bad screw (Sm) Since it cannot be bitten by the checker 34, it slides outward and falls out.

In addition, the primary black screw (Sr) which passes through both the screw checker 34, respectively, is guided to the above-described standard sorting unit 14 through the sliding chute 38 arranged in two rows, and fall off to the outside Screw Sm is collected into collection vessel 40a via guider 40 depicted in FIG.

Referring again to FIG. 1, the above-described standard sorting section 14 has a sorting roller 42 arranged inclined in pairs of two.

However, when only one screw checker 34 is arranged, only one pair of the sorting rollers 42 is also arranged.

A motor 44 is provided below the sorting roller 42 to drive one of the sorting rollers 42 through a power transmission member such as a timing belt 46. Both sorting rollers 42 ) Are rotated in opposite directions through gear connection of the pinion 48 attached to the upper end.

The snow rollers 42 arranged in this way are gradually reduced in diameter toward the lower side, so that the first diameter reducing surface 52 and the first diameter reducing surface bounded by at least two end portions 50 are described in detail in FIG. Two diameter reducing surfaces 54 are formed on the outer circumferential surface, and a stopper 56 made of a rubber ring is fitted to one of the second diameter reducing surfaces 54.

The paired pairs of sorting rollers 42 are arranged in such a state that both ends are rotatably supported by journal bearings 60, respectively, on an obliquely arranged base 58, and a gap therebetween. May be arbitrarily adjusted through the adjuster 62 disposed on one side of the base 58.

The journal bearing 60 is threaded through the slot 64 formed in the base 58 as shown in FIG. 7 to maintain the gap between the two sorting rollers 42 adjusted by the adjuster 62. The bolt 66 is fixed.

The sorting roller 42 sorts out the head specification defect of the primary black screw Sr supplied through the sliding chute 38.

Before sorting, the adjuster 62 and the bolt 66 are operated so that the gap between the upper side of both sorting rollers 42 is smaller than the head size of the screw S, and the adjacent first diameter reducing surface Reference numeral 52 denotes a value corresponding to the head specification, and the second diameter reducing surface 54 is set to a value larger than the head specification.

The screw Sr which is less than or has a shaping standard of the head out of the primary black screws Sr supplied at this time is dropped between the upper portions of both sorting rollers 42, and the screws are molded to regular dimensions. Sr is eliminated through the gap between the first diameter reducing surfaces 54. And the primary black screw Sr with the head exceeding the regular dimension passes through the first diameter reducing surface 54 and falls off between the second diameter reducing surface 54. In this process, the first black screw Sr, which passes through the second diameter reducing surface 54 without falling off due to the fast falling speed, induces the stopper 56 to fall off.

As described above, in the standard sorting unit 14 where the head standard of the primary black screw Sr is secondarily tested to select only the complete standard product, the base 58 is the floor 68 as described in detail in FIG. It is supported coaxially to the center of the base support 70, which is erected on the support), and is supported by the support 72 and the ball jointed arm 74, which can be arbitrarily tilted, and on the bottom of the sorting roller 42 Primary tests selected by three types by arranging chutes 76, 78 and 80 at positions in contact with the region, the region of the first diameter reducing surface 52, and the region of the second diameter reducing surface 54, respectively. Screws (Sr) are collected separately.

Here, through the chute 76 and 80, the primary black screw Sr whose head is below or above the standard size is collected, and the genuine screw S is collected through the chute 78 arranged in the middle.

Here, through the chute 76 and 80, the primary black screw Sr whose head is below or above the standard size is collected, and the genuine screw S is collected through the chute 78 arranged in the middle.

In this manner, when collecting the primary black screw (Sr) separately, at least the genuine screw (S) should be collected so as not to mix with other defective screws. For this reason, the gate 82 is arrange | positioned at the end of the chute 78 as shown in FIG. 9, and this can be opened and closed by the lever 84, and the tension force of the spring 86 is attached to the lever 84. This operation is always performed so that the state can be maintained as long as it is not operated again when the gate 82 is opened or closed.

The structure of the gate 82 as described above can be conveniently used when the container 88 for collecting the genuine screw (S) is filled and replaced with another container.

As described above, the present invention is to automatically check the screw screen and the head size screening of the screw through a continuous process, the sorting precision is high, the productivity is greatly improved, and the device is also easy to adjust to the specifications of the screw to be sorted Therefore, even non-skilled people can easily manage the device.

Claims (3)

The screw (S) introduced into the hopper 16 is received by the vibration trough 18 of the electronic feeder 20, and the vibration trough 18 is vibrated horizontally by the operation of the electronic feeder 20, and the hopper A screw supply unit 10 for feeding and feeding the screw S supplied to the 16 to the next step; It is disposed continuously with the guide channel 30 to be the back of the screw (S) accommodated therein, and includes a sorting channel (32) for selecting and passing only the screw (S) of a predetermined posture from the moving screw (S) It consists of a part feeder 26, and a pair of screw checkers 34 are arranged on the end side of the sorting channel 32, the screw (S) is plated on the guide channel 30 and the sorting channel (32) A part feeding part 12 which checks the screw-molding failure of the part and selects only the primary black screw Sr having the regular thread part and guides it to the sliding chute 38; On the upper surface of the base 58 arbitrarily arranged to be inclined adjustable, the sorting roller 42 having the first diameter reducing surface 52 and the second diameter reducing surface 54 coaxially formed with the edge 50 as a boundary thereof is provided. A chute 78 for disposing and collecting only the screw S having a normalized head size dropped between at least the first diameter reducing surface 52 at the bottom of the base 58 while being arranged to rotate in opposite directions. Screw sorting device consisting of a standard sorting unit 14 is provided. The touch switch 28 extending from the outside of the hopper 16 is disposed inside the part feeder 26 to control the operation timing of the electronic feeder 20. Screw sorting device. The screw sorting device according to claim 1, wherein the screw checker (34) consists of a pair of upper and lower facing pairs, and is configured to be engaged with a thread formed on the outer circumference of the screw (S) passing through the sorting channel (32). .