JPH075102Y2 - Item grip confirmation device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an article gripping confirmation device provided in a ceiling self-propelled vehicle or the like.

[Conventional technology]

Conventionally, when a ceiling self-propelled vehicle conveys bucket-shaped articles,
A device provided with a photoelectric switch is known as a device for confirming whether or not the article is securely gripped. That is, when an article is gripped, the article intercepts the optical axis of the photoelectric switch to detect the presence or absence of the article.

[Problems to be solved by the device]

However, in the above type, even if something other than the article blocks the optical axis of the photoelectric switch, it will be judged as holding the article, or the optical axis will not be properly engaged with the elevating frame. However, there is a problem that the article is lifted just by shutting off the door, and as a result, the article is dropped.

[Means for Solving the Problems]

In order to solve the above problems, the present invention provides, as an article confirmation device, a check section that supports a flange section of an article from below, a photoelectric switch that detects the article gripped by the check section, and a lower surface of the flange section of the article. A proximity switch that operates by contact is provided.

[Examples] Examples will be described below with reference to the drawings.

FIG. 1 is a schematic overall view of an overhead traveling vehicle (1) in which a guide rail (4) is provided on a ceiling (2) via a lifting tool (3), and travels along the guide rail (4). A vehicle (21) is movably suspended, and a lifting frame (5) is attached to the traveling vehicle (21).
Is provided, and the elevating frame (5) can be moved up and down by an elevating machine (8) including a suspension belt (6) and a winding drum (7).

The pair of guide rods (9) are provided on each of the left and right portions of the elevating frame (5), and the hand attachment member (10) is movably provided along the guide rods (9).
A pair of left and right hand attaching members (10) are provided, and concentric screw holes (11) are formed in each of the hand attaching members (10), and a screw shaft (12) is screwed into the screw holes (11). ,
By rotating the screw shaft (12) by a motor (13) via a bevel gear (not shown), the pair of hand attachment members (10) are moved toward and away from each other.

A hand part (14) is hung on each of the hand attaching members (10), and a pin (16) having a tapered tip is provided on a chuck part (15) at the front and rear parts of the hand part (14). It is erected. The pin (16) is adapted to engage with a through hole (18) formed in a pair of left and right flange portions (17) of a bucket-shaped article (W) to be conveyed.

The chuck section (15) is provided with a photoelectric switch (19) and a proximity switch (20) as described below. That is, the photoelectric switch (19) is horizontally provided below the chuck portion (15), and a projector and a receiver are provided on the left and right, two front and rear, and the optical axis (A) is usually the projector. The optical axis (A) is blocked by the article (W) when the article (W) is gripped. The proximity switch (20) is provided vertically on the side of the pin (16) of the chuck part (15), and the detection surface at the upper end thereof is in contact with the flange part (17) of the article (W) to be gripped. . That is, the pin (16) surely makes sure that the hole (1) of the article (W) is
Whether or not it is fitted in 8) is judged by the proximity switch (20) provided on the side thereof contacting the flange portion (17) of the article (W).

With the above configuration, the device of this embodiment operates as follows.

When the traveling vehicle (21) moves to a position above the article (W) and stops there, the lifting frame (5) moves the hand part (14) to the outermost side, and the flange part ( 17) Lower to the position where the upper end of the pin (16) is located below the lower surface. Next, the hand attachment members (10) move toward the center so as to approach each other, and stop the pin (16) at a position directly below the hole (18). After that, when the elevating frame (5) rises, the pin (16) fits into the hole (18), and the flange (17) is supported by the chuck (15) so that the article (W) does not fall, and the article ( Hold W). And some goods (W)
After lifting up, the two optical switches (19) are blocked from the optical axis (A), and the proximity switch (20)
After confirming that all the flanges (17) have been detected, the lifting frame (5) rises to the uppermost position and the traveling vehicle (2
Article transportation according to 1) is started. Above photoelectric switch (1
9), the height at which the article (W) is slightly lifted to confirm the presence or absence of the article (W) by the proximity switch (20) is preset to a height that is not dangerous even if the article (W) falls. ing. When the traveling vehicle (21) reaches the position where the article (W) is to be dropped, the traveling vehicle (21) drops the article (W) to a predetermined position by the reverse operation described above. After that, the elevating frame (5) is raised until the optical axis (A) of the photoelectric switch (19) is positioned slightly higher than the upper surface of the article (W), and then the two photoelectric switches (19) are used together with the optical axis (A). Is passed from the projector to the receiver unobstructed, and after confirming that the proximity switch (20) has not detected anything at all, it moves up to the uppermost position, and the gripping and conveying of the article (W) is completed. To do.

[Effect of device]

As apparent from the above description, according to the article gripping confirmation device of the present invention, in addition to the photoelectric switch that detects the article gripped by the check unit, the proximity switch that detects the gripped state of the article is provided. It is possible to reliably judge the grip of an article, and there is no danger of dropping.

[Brief description of drawings]

FIG. 1 is a schematic side view of an overhead self-propelled vehicle equipped with an article gripping confirmation device according to the present invention, FIG. 2 is an enlarged plan view of a main part of the article gripping confirmation device, and FIG. 3 is a front view thereof. is there. (5) …… Lifting frame (16) …… Pin (17) …… Flange (18) …… Hole (20) …… Detection means (proximity switch) (W) …… Article

Claims (1)

[Scope of utility model registration request] 1. A check part for supporting a flange part of an article from below, a photoelectric switch for detecting an article gripped by the check part, and a proximity switch which operates by abutting on a lower surface of the flange part of the article. An article gripping confirmation device characterized by being provided.