JPS60127941A - Parts feeder - Google Patents

Abstract

PURPOSE:To perform the reliable feeding of parts, by setting a guide arm which is extended along the feed rod's advancing direction, and setting a detecting apparatus which detects the passing of parts which are held stably by the feed rod, on the said guide arm. CONSTITUTION:The front one of parts 7, such as nuts, which have been fed from a parts feeder to a feed head 1, through a feed pipe 6, is attracted and held by a magnet 8 in a provisional detaining room. When a feed rod 9 is moved downward by an air cylinder, in the said situation, the nut 7 is held as a small diameter guide part 11 of the feed rod 9 is inserted in a screw hole of the nut 7, fed on a steel plate 14 on a fixed electrode 13, and is positioned as it is fitted on a pin 15. On this occasion, whether the nuts 7 feeding is performed or not is detected by a detecting apparatus 23, which is formed of such as a limit switch on the top of a guide arm 18 set on the feed head 1, and the reliable nut welding work can be performed, by controlling the operation of a movable electrode 16 according to the output of the detecting apparatus 23.

Description

[Detailed description of the invention] A parts supply device has been put into practical use that temporarily holds parts supplied from a parts feeder in a temporary fixing chamber, holds them on all supply rods, and sends them to the desired location. has been done.

To explain such a component supply device according to FIG. 1, a temporary fixing chamber 2 opening downward is provided in the supplying rod 1, and a component supply passage 3 and a guide cylinder are connected to each other in communication with the temporary fixing chamber 2. 4 is provided. The parts supply passage 3 is composed of a passage pipe 5 of the supply head 1 and a feed vibro extending from a parts feeder (not shown).
Further, the guide strip 4 is branched from the supply head 1 and is configured in such a manner that it is possible to branch out from the supply head 1. The part that is missing from the embodiments shown in FIG. 1 and described later is a projection nut with a protrusion for spot welding, which has a screw hole in the center of a rectangular shape, and is designated by the reference numeral 7. There are various methods for temporarily locking the nut 7 in the temporary locking chamber 2, such as an opening/closing door type that is pushed open by the nut, and a magnetic type. A magnetic type is shown. The magnet 8 is fixed to the supply head 1 in such a manner that it forms one inner wall of the temporary locking chamber 2 in front of the component supply passage 3. A supply rod 9 is slidably inserted into the guide @a, and the rod 9 consists of a rod portion 1o and a thinner guide portion 11, with an extrusion surface 12 at the boundary between the two.
is the provision. This supply head 9 is moved forward and backward by an air cylinder (not shown).

Where the nut 7 is supplied, the steel plate 1 on the fixed electrode 16
4, and a pin 15 for positioning the nut 7 is provided on the fixed electrode 1'5. Note that 16 is a movable pole.

In the illustrated state, the nut 7 is temporarily locked by the magnet 8 in the temporary locking chamber 2, and when the supply rod 9 advances here, the guide portion 11 first penetrates the entire screw hole of the nut 7. Then, the extrusion surface 12 comes into contact with the upper surface of the nut 7 and pushes the nut 7 down, so that the nut 7 is fitted into the pin 15 as shown by the two-dot chain line. supply rod 9
The advancing speed of the nut 7 is set to be approximately the same as the falling speed of the nut 7, or a value slightly faster than that, so that the nut 7 is held on the supply rod 9.

In the above-mentioned 17-grade supply device, there are problems such as sticking. In other words, if impurities such as iron scraps get stuck in the feed vibro together with the nut 7, the nut will only advance that far and will not reach the 1 unit chamber 2 inch position, and if the supply rod 9 continues to stroke, This is a so-called empty stroke (miss stroke), and the flexible electrode 16 descends to a place where there is no nut. Alternatively, as shown in FIG. 2, impurities 17 such as iron chips are present between the magnet 8 and the nut 7, causing the threaded hole of the nut 7 to be misaligned with the center of the id portion 11. When Division 11 advances,
The nut 7fc will be thrown off at the tip, and the above-mentioned empty stroke will occur. Furthermore, empty strokes may occur due to parts cutting by the parts feeder.

The present invention was devised to solve all of the above-mentioned problems, and attempts to perform component detection based on an unprecedented concept. Normally, countermeasures are taken based on the idea of fully detecting whether or not a part is present at a predetermined location, in other words, whether or not the component is stationary at a predetermined location in the correct posture.However, in the present invention, the supply rod The object of detection is the state in which the part is stably held at the position of the part, and it is intended to be detected during the transition period of movement during the entire supply stroke. And this stable part 1i? In order to accurately obtain the state, the idea is to install all the force-aided arms serving as guide means and to ensure that the correct holding state is fully established in the detection @.

The present invention has been described in detail according to the illustrated embodiments! First, Figure 1 shows the above-mentioned public corporation's parts supply location. , with all the essential components of the invention added,
A guide arm 18 made of a long strip-shaped iron plate extends in the advancing direction of the supply rod 9. The method of fixing the guide arm 18 is to bend its upper end to create a fixing piece 19, and then
, lLt, and fix it to the magnet 8 by screwing in the bolt 20. Blue absorption surface 21 of magnet 8 and guide surface 2 of guide arm 18
2 is smoothly continuous as shown in the figure, and the guide arm 18
A detection means 25 for detecting passage of a component is installed at the tip. The detection means 25 is for electrical detection, and a connection 24 for this purpose is shown. Specific examples of the detection means are illustrated from FIG. 6 onwards, and FIGS. 6 and 4 are of a limit switch type. A limit switch 26 is attached to the back of the guide arm 18 using a mounting bracket 25, and an actuator 27 of the switch 26 is inserted into a slit 28' formed in the guide arm 18. When the actuator 2 is swung with its upper center centered, the limit switch 26 is activated.
As shown in the figure, the bent portion 29 of the lower part protrudes entirely from the guide surface 22.

When the nut 7 is correctly held by the supply rod 9 and advances, the bent portion 29 is pushed in on the outer surface of the nut 7, and the limit switch 26 generates a signal indicating that the nut is working normally. If, in the case of an idle stroke as described above, no signal is output from the limit switch 26 even after a certain period of time has elapsed since the supply rod 9 has advanced, the entire circuit should be configured to indicate an abnormality. It is appropriate that this abnormality signal causes the entire movement of the movable electrode 16 to be stopped.

FIG. 5 shows an example of a proximity switch 30 that magnetically detects when a nut 7, which is a magnetic material, passes by. be.

As described above, according to the present invention, a guide arm extending in the advancing direction of the supply rod is installed, and a detection means for detecting passage of a component stably held by the supply rod is installed on the guide arm. Because of this, the following excellent effects can be obtained. In other words, the part is pushed out from the temporary fixing chamber and moves while sliding in contact with the guide surface of the guide arm (if the guide arm is also subjected to magnetic force, the sliding resistance can be more controlled) and goes to -0. Therefore, if it is a part like a square nut, its orientation can be adjusted in a constant manner, and the I'R contact resistance ensures close contact between the extrusion surface of the supply rod and the part, and the supply rod can be stabilized. This results in reliable parts retention and highly reliable supply. In addition, since one throat of the detecting hand is operated once after stable holding is completed, there is no problem in holding the part after the detecting means has passed the bend, and the above-mentioned empty space can be removed. )
As a countermeasure against failure, detection is performed during the supply transition period when it is most reliable.

[Brief explanation of drawings]

Fig. 1 is a longitudinal side view of the device of the present invention, Fig. 2 is an enlarged view showing the abnormality of parts being attracted, Fig. 6 is a side view of the limit switch section, Fig. 4 is a front view of the same, and Fig. 5 is a close-up view. FIG. 3 is a side view of the switch. 2- Temporary fixing chamber, 7 Parts, 9- Supply rod, 18
...Guide arm, 25...Detection means. Applicant Satoshi Nagao Ill

Claims (1)

[Claims] In a device in which all parts temporarily locked in a temporary holding chamber are held by a supply rod and sent out, an id bowl is provided which extends in the advancing direction of the supply rod and guides the parts held by the supply rod. An f2B product supply device characterized in that a guide arm is provided with a detection means for detecting passage of a component stably held by a supply rod.