JPH02284774A - Detection of parts for parts supplying device - Google Patents

Abstract

PURPOSE:To detect the sure holding of parts to a supplying rod by closing an energizing circuit by the contact when the parts are held to the supplying rod. CONSTITUTION:A nut 1 is attracted to a magnet 14 and is tentatively detained in a tentative chamber 5. The supplying rod 2 is held in the most retreated position. The supplying rod 2 starts to advance by the action of cylinder 11. A guide rod 8 passes the threaded hole of the nut 1 and an extruding surface 10 of the supplying rod 2 passes a through-hole 12 of an insulating material 13, thus coming into tight contact with the front surface of the nut 1. The current from an electric wire 21 flows from the supplying rod 2 through the nut 1 to a stop plate 6 and the circuit to the electric wire 22 is closed. The correct holding of the nut 1 to the supplying rod 2 is thus confirmed. The generation of a fault is detected and the operation of associated apparatus is stopped unless current flows between the electric wires 21 and 22 at this time.

Description

Detailed Description of the Invention (a) Industrial Application Field The present invention relates to a method for detecting whether a component is being held securely in a component supply device that holds and supplies components with a supply rod. There is.

(Conventional technology) In the type of feeding rod that holds parts and sends them to the destination, a check tube is used to check whether the parts are present at a predetermined location. Some known types include those that operate a microswitch using the gravity of a component, and those that detect using a 7-bit transistor.

In the conventional example as mentioned above, the structure is complicated because it has to be installed in a part of the entire supply device for precision parts such as microswitches and phototransistors. In addition, because the parts were made in good condition, they were sometimes contaminated with impurities, resulting in malfunctions.

(b) Means for solving the problem and its operation The present invention is a method provided to solve the above-mentioned problem, in which the part t is -U is known to confirm the presence of a component by closing an electrical circuit, and to confirm an abnormality if the electrical circuit remains unclosed.

(E) Examples Below, examples of the drawings will be explained.
The figure shows a type in which nuts are supplied by passing a supply rod 2=i through a screw hole of a nut 1, and an opening 4 is provided at the end of a component supply pipe 6 having a rectangular cross section. , a temporary fixing chamber 5 for the nut 1 is formed above it.

The right end of the temporary stopper 5 is closed by a stop plate 6. An outer cylinder 7 is welded to the upper surface of the parts supply pipe 5, and inside it (
A supply rod 2 is housed therein. The supply rod 2 consists of a thin rod 8 which passes through the threaded key metal of the nut 1, and a main rod 9 which is thicker than the main rod 8, and an extension W110 is provided at the boundary between the two rods 8 and 9.

Air cylinder 11 connected to supply rod 2Fi outer cylinder 7
The main rod 9 is the piston rod of the air cylinder. A through hole 12 is provided on the upper surface of the component supply pipe 5 to allow the main rod 9 to pass therethrough.
A magnet (permanent magnet) 14 is fitted in the stop plate 6, in which a through hole 12 is opened in the semi-edge material 16, and both sides of the stop plate 6 are covered with protective plates 15 and 16. . An arm 17 is welded to the outside r47, and a bolt 18 screwed into the arm 17 is pressed against the stop plate 6'Jt.

A sliding plate 12, which is a Wt air sliding contact point, is in constant elastic contact with the main wood 9, and this (MMb wood 19 has an insulating material 20
Fixed to outer WR7 via metal, 4@plate 19 protrudes to the outside L7? , the individual pfrVC electric wires 21 are connected. on the other hand,
The other T-shape 22 is connected to the stop plate 6.

In FIG. 1, the nut 1 is attached by the magnet 14, so that it is temporarily stopped in the temporary fixing chamber 5, and the supply rod 2 is at its most retracted position.

Here, when the supply rod 2 starts moving forward under the action of the air cylinder 11, the guide rod 8 passes through the threaded hole of the nut 10, and when it reaches a certain point f, the extrusion surface 10 comes into close contact with the upper surface of the nut 1.

As a result, the current from the Wl wire 21 flows from the supply rod 2 through the nut 1 to the stop plate 6, and the circuit to the electric wire 22 is closed. This circuit closure confirms that the nut 1 is present and is correctly held on the supply rod 2, and confirms that the nut is in a normal state.

However, if nut 1 is not stopped at temporary locking chamber 5 for some reason and is next, supply rod 2 will advance and no current will flow between t-wires 21 and 22 despite being at 9. , it is determined that there is an abnormality, and as a result, other related equipment, such as the projection welding machine 4, is prevented from starting its operation.

Next, the embodiments shown in FIGS. 6 and 4 will be explained. The difference from the previous ones is that the nut 1 is replaced by the lid 231F. This is the point. Therefore, since it is impossible to penetrate the guide rod as described above, the tip of the supply rod 20 is formed into a triple-function shape 1, and the nut 1 is housed and held therebetween. As is clear from the fourth factor, a pair of protrusions 24 and 25 are provided at the ninth point of the triple-function shape, and an insulating material 26 is attached to the stop surface of the nut 1.

In the state shown in Fig. 245, the electric circuit is not closed, but when the supply rod 2 advances a little from this state, the nut 1 comes into contact with the gold rA surface of the stop stage 6, so the electric wires 21, 22
A current flows between them. If the nut 1 is not at the position shown in the figure, the 4A-shape detection is performed immediately after the supply rod 2 starts advancing, as in the previous embodiment.

In FIG. 5, the installation of the sliding plate 19 is stopped and an insulating material 27t is interposed between the outer cylinder 7 and the air cylinder 11, and the electric wire 21
' is connected to the air cylinder 11.

Therefore, when the supply rod 2 and the nut 1 come into contact with each other, the electric wires 21 and 22 become electrically connected.

In the above embodiments, nuts have been mainly explained, but the shape of the parts supply pipe can be completely changed to supply bolts, and various parts can be handled.

(f) Effects According to the present invention, since the detection circuit is established by the contact between the supply rod and the component, it is possible to avoid the problem of precision components as in the conventional example, and improve reliability. A high confirmation performance can be obtained. In particular, the above-mentioned effects can be obtained by effectively utilizing the phenomenon of tangential contact between the supply rod and the component.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a longitudinal sectional side view;
Stone figure 2 is plane 1, figure 3 is ** side view, figure 4 is flat Wi.
FIG. 5 is a vertical sectional side view. ...Parts, 2...-Supply rod.

Claims (1)

[Claims] A component detection method in a component supply device that closes an energized circuit by contact when a component is held on a supply rod, thereby detecting that the component is normally held on the supply rod.