JPH0719287U - Overhead traveling vehicle - Google Patents

Abstract

(57) [Abstract] [Purpose] Even if the load conveyed to a station or the like is misaligned, the load can be reliably gripped by the gripping device, and the misalignment can be corrected before the other load is corrected. Transport to a station. [Structure] An elevating table 11 that can be moved up and down with respect to an overhead traveling vehicle main body 10, a load gripping device 20 that is horizontally movable with respect to the elevating table 11, and an elevating table 11
A straightening means 40 for straightening and holding the gripping device 20 at a predetermined position when rising is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an overhead traveling vehicle arranged in a factory, a warehouse or the like. In particular, even if the load transferred to a station or the like is misaligned, the load can be reliably gripped by the gripping device, and the misalignment can be corrected before it is transferred to another station or the like. The present invention relates to an overhead traveling vehicle capable of driving.

[0002]

[Prior art]

 Generally, an overhead traveling vehicle equipped with an overhead traveling vehicle main body that travels along a rail provided on the ceiling and an elevating platform that can be moved up and down by a belt or the like with respect to the overhead traveling vehicle main body is known. ing.

In such an overhead traveling vehicle, a load is held by a load gripping device provided on an elevator and the load is conveyed from a predetermined station to another station.

FIG. 5 is a front view showing such an overhead traveling vehicle.

In the figure, reference numeral 1 is a main body of an overhead traveling vehicle that travels along a rail R arranged on a ceiling T of a building, 2 is an elevating platform provided so as to be movable up and down with respect to the main body 1 of the overhead traveling vehicle, and 3 is It is a load gripping device provided on the lifting platform 2. B is the load gripped by the gripping device 3.

The gripping device 3 has a pair of chucking arms 4 and 5 which hang down from the front and rear of the lifting table 2. The chucking arms 4 and 5 are configured to advance and retreat in the front-rear direction (X direction in the drawing) of the elevating table 2 by an unillustrated advancing and retracting mechanism provided in the elevating table 2 to grip the load B. .

[0007] Such an overhead traveling vehicle travels to a station or the like, lowers the lifting platform 2, operates the chucking arms 4 and 5 of the gripping device 3, and grips the load B. After that, the elevating table 2 is raised, the vehicle travels to another station, etc., and the load B is unloaded.

[0008]

[Problems to be solved by the device]

 The above-described conventional overhead traveling vehicle has the following problems.

The load B conveyed to the station or the like is likely to be displaced due to vibration during conveyance or the like. For this reason, the chucking of the gripping device 3 may be unreasonable, and the load may not be gripped by the gripping device 3.

In addition, there is a problem that a load conveyed with a positional deviation is unloaded with a positional deviation at a destination station or the like.

An object of the present invention is to solve the above problems and ensure that a gripping device grips a load even if the load conveyed to a station or the like is displaced. Another object of the present invention is to provide an overhead traveling vehicle that can be transported to another station or the like after correcting the positional deviation.

[0012]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides an elevating platform that is movable up and down with respect to a main body of an overhead traveling vehicle, a loading device that is horizontally movable with respect to the elevating platform, A straightening means is provided for straightening and holding the gripping device at a predetermined position when the lift is raised.

[0013]

[Operation effect]

 Since the present invention has the above-mentioned configuration, it has the following operational effects.

That is, since the gripping device is provided so as to be movable in the horizontal direction with respect to the elevating table, it can be flexibly moved in the horizontal direction when gripping the load, and the position of the load is displaced. Even in the case, the load can be reliably gripped.

Since the correction means corrects and holds the gripping device at a predetermined position when the lifting table is lifted, the load is conveyed to another station or the like after the positional deviation is corrected. Therefore, suitable load transfer is realized.

[0016]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view of a main part showing an embodiment of an overhead traveling vehicle according to the present invention, and FIG. 2 is a left side view of the same part.

In these drawings, 10 is a main body of an overhead traveling vehicle that travels along a traveling rail R provided on a ceiling T of a building, and 11 is a lifting belt 12 that can be raised and lowered with respect to the main body 10 of the overhead traveling vehicle. It is an elevated platform. There is a winding mechanism (not shown) in the overhead traveling vehicle main body 10, and the belt 12 is wound or fed out by the winding mechanism, so that the lifting platform 11 moves up and down.

Reference numeral 20 denotes a load gripping device. The gripping device 20 includes chucking arms 21 and 22 and an advancing / retreating mechanism 23 for advancing / retreating the chucking arms 21 and 22.

Like the conventional example, the chucking arms 21 and 22 are arranged so as to hang down from the front and rear of the elevating table 11, and have folding parts 21 a and 22 a for supporting the article B. There is.

The advancing / retreating mechanism 23 is composed of moving bodies 24, 25 which are moved by a drive motor or the like (not shown), and a pair of linear motive guides 26, 26 for guiding the advancing / retreating movement of these moving bodies 24, 25. ing. The linear motive guides 26, 26 are attached to the base portion 27.

Reference numeral 30 denotes a moving device that suspends the gripping device 20 so as to be movable in the horizontal direction (the arrow X direction in FIG. 1) with respect to the lifting table 11. The moving device 30 includes moving bodies 31 and 32, and linear motives 33 and 33 that guide the movement of the moving bodies 31 and 32. The base 27 of the gripping device 20 is attached to the lower portions of the moving bodies 31 and 32.

Reference numeral 40 is a protrusion serving as a correcting means, and 41 is an engaging portion. The protrusion 40 is formed in a substantially conical shape, and is provided at the center of the lower portion of the lift table storage portion 13 of the overhead traveling vehicle body 10. The engaging portion 41 is formed in a columnar shape, and is provided at the center of the upper surface of the base portion 27 of the grip device 20. An upper portion 41a of the engaging portion 41 is provided with an inverted conical concave portion 42 with which the protrusion 40 can be loosely engaged. The upper portion 41 a of the engaging portion 41 is located inside the lift table 11.

The protrusion 40 and the recess 42 of the engaging portion 41 are engaged with each other by housing the elevator 11 in the elevator storage 13 of the overhead traveling vehicle main body 10.

Therefore, when the lift table 11 is lifted and stored in the lift table storage portion 13, the gripping device 20 of the lift table 11 is always in a predetermined position due to the engagement between the protrusion 40 and the engaging portion 41. Will be retained.

In this case, the protrusion 40 is formed in a substantially conical shape, and the concave portion 42 of the engaging portion 41 is formed in an inverted conical shape with which the protrusion 40 is loosely engaged, which will be described later. Even if the position of the recess 42 is displaced by the movement of the gripping device 20, the displacement of the recess 42 is corrected as the recess 42 engages with the protrusion 40.

Next, the operation of the overhead traveling vehicle having such a configuration will be described with reference to FIGS. 3 (a) to 3 (d).

When the load conveyed to the station or the like has a positional deviation, as shown in FIG. 3A, the folded portions 21 a and 22 a of the chucking arms 21 and 22 of the load gripping device 20 and The intervals L1 and L2 with the load B are non-uniform. When the chucking arms 21 and 22 are closed in this state, the folded-back portion 22a of the chucking arm 22 contacts the load B before the folded-back portion 21a of the chucking arm 21, and the chucking arm 22 contacts the side surface W1 of the load B. Press. As a result, as shown in FIG. 3B, the gripping device 20 horizontally moves in the direction of the arrow X1 in the figure, and the chucking arms 21 and 22 grip the load B.

After that, when the lifting platform 11 is raised to the overhead traveling vehicle main body 10, as shown in FIG. 3C, the protrusion 40 of the overhead traveling vehicle main body 10 is inserted into the recess 42 of the engaging portion 41 of the gripping device 20. However, as the engagement between the concave portion 42 and the protrusion 40 deepens due to the further elevation of the lifting table 11, the positional deviation of the engaging portion 41 is corrected and the gripping device 20 is moved to a predetermined position. Will be returned to and held at the position (see FIG. 3D). As a result, the displacement of the load B is corrected.

After that, the overhead traveling vehicle main body 10 travels to another station or the like and unloads the load B.

According to the above-described overhead traveling vehicle of the present embodiment, since the gripping device 20 is provided so as to be movable in the horizontal direction with respect to the lifting platform 11, the gripping device 20 is horizontally moved when gripping the load B. The load B can be moved flexibly, and the load B can be reliably gripped even if the load B is displaced.

The straightening means 40 is configured to straighten and hold the gripping device at a predetermined position when the lifting table 11 is lifted, so that the load B is transported to another station after the misalignment is corrected. Will be done. As a result, it is possible to realize suitable load transportation.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be appropriately made within the scope of the present invention.

For example, as shown in FIG. 4, a free bearing 50 is provided between the elevating table 10 and the gripping device 20, and the gripping device 20 is provided so as to be movable in all front, rear, left, and right horizontal directions with respect to the elevating table 10. May be. In this way, by disposing the gripping device so as to be movable in all the front, rear, left and right horizontal directions, it is possible to deal with the positional deviation of all the front, rear, left and right loads.

[Brief description of drawings]

FIG. 1 is a front view of a main part showing an embodiment of an overhead traveling vehicle according to the present invention.

FIG. 2 is a left side view of the same main part.

FIG. 3A to FIG. 3D are explanatory views of operation.

FIG. 4 is a front view of a main part showing another embodiment.

FIG. 5 is a front view showing a conventional overhead traveling vehicle.

[Explanation of symbols]

 10 Overhead traveling vehicle main body 11 Lifting table 20 Grasping device 40 Correcting means

Claims (1)

[Scope of utility model registration request] 1. An elevating table provided to be movable up and down with respect to a main body of an overhead traveling vehicle, a load gripping device provided so as to be horizontally movable with respect to the elevating table, and the gripping device when the elevating table is raised. An overhead traveling vehicle, comprising: a straightening unit that straightens and holds the device at a predetermined position.