JP3120759B2 - Elevating platform positioning device for overhead traveling vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a self-propelled vehicle along a rail provided near a ceiling of a factory or a warehouse.
A lifting platform having a gripping member for articles is hung by a rope, and the rope is wound on a drum provided on the main body or unwound from the drum, so that the lifting platform can be raised and lowered. The present invention relates to a positioning device.

[0002]

2. Description of the Related Art A conventional overhead traveling vehicle and an elevator positioning device for the overhead traveling vehicle will be described with reference to FIG.

A traveling wheel 3 disposed on a main body 2 of an overhead traveling vehicle V is mounted on a horizontal portion 1a formed opposite to a rail 1 disposed near the ceiling, and the main body 2 has A plurality of drums 5 capable of winding or unwinding the rope 4 are provided. The rope 4 wound around the drum 5 is attached to the rope 4 by a gripping member (not shown).
The elevating platform 6 holding the article W is attached. Lifting table 6
Are provided with a plurality of vertical guide holes 6a, and a plurality of vertical poles p which can be inserted into the guide holes 6a formed in the lift 6 on the station side where the article W is placed.
Is erected.

[0004] The overhead traveling vehicle V is run with the lifting platform 6 holding the article W held by the holding member approaching the main body 2, and the article W being held is placed. The overhead traveling vehicle V is stopped above a predetermined station. Thereafter, the rope 4 is rewound from the drum 5 and the elevator 6 is lowered. Then, a pole p erected on the station side is inserted into a guide hole 6a formed in the lift 6 to regulate the position of the article W with respect to the station, and the article W is arranged at a predetermined position. Thereafter, the grip of the gripping member gripping the article W is released, and the rope 4 is wound around the drum 5 to raise the elevator 6. Thereafter, the overhead traveling vehicle V starts traveling toward another station in order to grip another article W.

[0005]

In the above-described conventional elevator positioning apparatus for an overhead traveling vehicle, a pole p fixedly provided on the station side is provided with a guide formed on a descending elevator 6. Since the pole p is inserted into the hole 6a, the pole p may collide with the bottom of the article W located below the descending elevating platform 6, and the article W may be damaged.

Also, the pole p is moved down by the elevating platform 6.
If the elevator 6 is continued to descend when it directly collides with the elevator 6 without being inserted into the guide hole 6a, the elevator 6 may be inclined, and the article W may fall off the gripping member. there were. If the guide hole 6a is made large in order to prevent such a collision of the pole p with the elevator 6, there is a problem that the positioning accuracy of the elevator 6 deteriorates.

Further, in order to prevent the above-mentioned collision of the pole p with the article W, the plane area of the elevator 6 is increased, and the guide hole 6a of the elevator 6 is moved from the article W gripped by the gripping member. If it is drilled at a distant position, there is a problem that the elevator 6 becomes large, and the overhead traveling vehicle V becomes large.

An object of the present invention is to solve the problems of the above-described conventional elevator positioning apparatus for an overhead traveling vehicle.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention firstly provides a bifurcated arm attached to a guide member attached to an elevating platform suspended from the body of an overhead traveling vehicle. To
An elevating member having an elevating table-side positioning member attached to the two vertical legs to be formed is disposed so as to be able to move up and down via a sliding block. After positioning the table,
The elevator is lowered. Second,
The positioning of the lifting platform is performed by fitting a hemispherical fitting concave portion and a hemispherical fitting projection,
Third, the forked arm of the elevating member straddles the communication device provided in the station.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. However, the present invention is not limited to the embodiment unless it exceeds the gist of the present invention. Note that the same reference numerals are used for the same members as those of the above-described conventional elevator positioning apparatus for an overhead traveling vehicle.

An elevating platform 6 suspended by a rope 4 has engaging pieces 7 respectively attached to lower ends of a plurality of rotating shafts 7a.
b is provided. In the present embodiment, as an example, the article W is configured as a substantially rectangular parallelepiped case containing a wafer or the like, and the article W as the case is provided with a holding plate w2 via a vertical rod w1. Is being worn. Then, as shown in FIG. 1, by rotating the rotation shaft 7 a so that the engagement pieces 7 b face inward each other, the engagement pieces 7 b
It is configured to hold a holding plate w2 of the article W.

Reference numeral 8 denotes a guide member suspended from a frame 9 attached to the elevating table 6. The guide member 8 has a pair of vertical grooves 8b over a predetermined length with a center wall 8a interposed therebetween. Are formed. 10 has a horizontal cross section of approximately C
It is a lifting / lowering member comprising a letter-shaped sliding block 10a and a forked arm 10b attached to the sliding block 10a. At the lower ends of the two vertical legs 10c forming the forked arm 10b, a hemispherical fitting concave portion 10d having an opening facing downward is provided.
The fitting block 10e in which is formed is attached. Then, as shown in FIG.
By inserting a sliding block 10a having a substantially C-shaped horizontal cross section into a pair of vertical grooves 8b formed in the guide member 8, the elevating member 10 is moved along the guide member 8,
It is configured to move up and down.

S is a vertical frame s1 erected on the floor.
And an article mounting table s2 attached to the vertical frame s1. On the article mounting table s2,
Square-shaped guide members 11 and 12 are attached in parallel with an interval at which the bottom of the article W can enter. One guide member 11 has two vertical legs 10c of the elevating member 10 described above.
A pair of hemispherical fitting projections 13 are attached at the same interval as the hemispherical fitting recess 10d formed in the fitting block 10e attached to the fitting block 10e. In addition, a communication device 14 for exchanging information on the article W such as identification of the article W to be placed and a placement state with a control unit (not shown) is provided between the fitting protrusions 13. ing. In addition, the upper corners on the opposite sides of the rectangular-shaped guide members 11 and 12 are obliquely deleted to form the inclined guide surfaces 11a and 12a. It can be configured to be guided by 11a and 12a.

Next, the station S of the elevator 6 according to the present invention will be described.
Will be described.

When the elevator 6 in the course of lowering in FIG. 1 is further lowered, as shown in FIG. 3, the guide 6 is attached to the elevator 6 via a frame 9 so as to move up and down. A pair of hemispherical fitting protrusions 13 attached to the guide member 11 provided in the station S fits into the hemispherical fitting recess 10d formed in the fitting block 10e of the movable lifting member 10. In this case, the positioning operation is performed, and the article W is placed on the article placing table s2 of the station S.

The lower surface of the holding plate w2 of the article W and the upper surface of the engaging piece 7b of the gripping member 7 remain in contact,
Alternatively, in a state where the article W is not completely placed on the article placing table s2 of the station S but is still suspended by the engaging piece 7b of the gripping member 7, the rotating shaft 7a is rotated. As a result, a trouble may occur in which the engagement piece 7b is detached from the lower surface of the holding plate w2 and the work of releasing the article W from the gripping member 7 is not performed properly. Then, after the fitting protrusion 13 attached to the guide member 11 arranged in the station S fits into the fitting recess 10d of the fitting block 10e of the elevating member 10, it is further shown in FIG. As described above, the elevator 6 is lowered to hold the article W holding plate w2.
A predetermined gap is formed between the lower surface of the holding member 7 and the upper surface of the engaging piece 7b of the gripping member 7. As described above, even if the elevating table 6 is further lowered, the elevating member 10 is configured to be able to move up and down with respect to the guide member 8, and only the guide member 8 can be lowered. Is not damaged. After a gap is formed between the lower surface of the holding plate w2 of the article W and the upper surface of the engagement piece 7b of the gripping member 7,
By rotating the rotating shaft 7a, the engaging piece 7b is held by the holding plate w.
2 and the work of releasing the article W from the gripping member 7 is completed. Thereafter, the rope 4 is wound around the drum 5 to raise the elevator 6.

As described above, with respect to the guide member 8,
Since the elevating member 10 is configured to be able to move up and down, even if positioning fails, the elevating member 10 does not tilt as in the above-described conventional elevating platform positioning device for an overhead traveling vehicle.

The lifting member 1 is moved relative to the guide member 8.
0 is configured to be able to move up and down freely, and
The positioning member on the station S side corresponding to the hemispherical fitting concave portion 10d as the positioning member on the side is formed on the hemispherical fitting projection 13, so that the positioning fails and the bottom of the article W Etc. collides with the fitting projection 13,
The article W is not damaged. Of course, the elevating member 1
The positioning member on the 0 side may be a hemispherical fitting projection, and the positioning member on the station S side may be a hemispherical fitting recess.

Further, the lifting member 10 is connected to the forked arm 10b.
And the hemispherical fitting recess 1 is formed in the forked arm 10b.
Since the fitting block 10e in which the 0d is formed is attached, and the bifurcated arm 10b straddles the communication device 14 provided in the station S, the communication function of the communication device 14 is There is no damage to the communication device 14 due to damage or contact with the elevating member 10.

Further, since the positioning of the present invention is performed by fitting the hemispherical fitting concave portion 10d and the hemispherical fitting projecting portion 13, the fitting concave portion 10d and the fitting projecting portion 13 are formed. Even if there is a slight deviation in the positional relationship between the two, the positioning position can be easily corrected by the relative movement of the two along the spherical curved surface, so that simple and highly accurate positioning can be performed.

[0021]

Since the present invention has the above-described structure, the following effects can be obtained.

An elevating member having a positioning member on the elevating platform side is provided on a guide member attached to the elevating platform suspended from the main body of the overhead traveling vehicle so as to be able to move up and down. After the positioning of the lifting platform by the positioning member and the positioning member on the station side, the lifting platform is further lowered, so that the work of releasing the article from the gripping member can be reliably performed.

Since the positioning of the elevating table is performed by fitting the hemispherical fitting concave portion and the hemispherical fitting projection, the displacement of the positioning can be easily corrected, and therefore, it is simple and accurate. High positioning can be performed.

Since the lifting member is formed as a forked arm, and the forked arm straddles the communication device provided in the station, the communication function of the communication device is impaired during positioning work. The communication device can be prevented from being damaged by contact with the elevating member.

[Brief description of the drawings]

FIG. 1 is a front view of a main part of an elevator platform positioning device for an overhead traveling vehicle according to the present invention.

FIG. 2 is a perspective view of a main part including a partial cross section of the elevator platform positioning device for an overhead traveling vehicle according to the present invention.

FIG. 3 is a front elevational view of a main part of an elevator platform positioning device for an overhead traveling vehicle according to the present invention, similar to FIG.

FIG. 4 is a front elevational view of a main part of an elevator platform positioning device for an overhead traveling vehicle according to the present invention, similarly to FIG.

FIG. 5 is a schematic perspective view of a conventional elevator positioning apparatus for an overhead traveling vehicle.

[Description of Signs] V ························································································ · Gripping device 8 ··············································································

Claims (3)

(57) [Claims] A guide member attached to a lift suspended from a main body of an overhead traveling vehicle has two vertical arms forming a forked arm.
The lifting member with the positioning member on the lifting platform side attached to the straight leg
The overhead traveling vehicle is arranged so as to be able to move up and down via a sliding block, and after the positioning of the elevator by the positioning member on the elevator side and the positioning member on the station side, the elevator is further lowered. Lifting table positioning device. 2. The elevator platform positioning apparatus for an overhead traveling vehicle according to claim 1, wherein positioning of the elevator platform is performed by fitting a hemispherical fitting concave portion and a hemispherical fitting projection. . 3. The elevator platform positioning device for an overhead traveling vehicle according to claim 1, wherein the forked arm of the elevator member straddles a communication device provided in the station.