JPS6351913B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a trolley transport device.

In general, a trolley transport device is effective as a means for transporting seats and the like to an installation work site in the outfitting assembly of automobiles. By the way, when using such a device to operate the trolley hanger continuously at a constant speed and load a workpiece onto the hanger, it is necessary to lift the workpiece using a loading lifter and transfer it to the load receiving section of the trolley hanger in a timely manner. Since the trolley hanger is always moved in one direction by the trolley conveyor, it is difficult to adjust the timing well, and there is a problem that the loading operation becomes dangerous.

Therefore, in order to solve such problems, conventionally,
As shown in Utility Model Application Publication No. 57-25828,
There is a system in which the trolley hanger is moved intermittently, and when the trolley hanger is stopped, the trolley hanger is guided so that it does not move, and then the workpiece is hung on the trolley hanger. However, such a conventional device has a problem in that the conveyance speed becomes slow due to the stoppage of the trolley hanger, resulting in poor conveyance efficiency.

The present invention has been made in view of the problems of the conventional ones, and includes a trolley conveyor that constantly moves in one direction, and has bifurcated fork parts for receiving luggage, and a trolley main body of the trolley conveyor. A large number of trolley hangers are provided so as to be rotatable around a vertical axis and in the front and rear directions, and a loading lifter and an unloading lifter are arranged at predetermined positions below the trolley conveyor. A first direction changing means for rotating the trolley hanger so that its fork portion faces forward is disposed on the upstream side and between the two lifters, and the trolley hanger is positioned upstream of the conveyor from the unloading lifter. A second direction changing means for rotating the fork portion so as to face rearward is disposed near the load lifter, and upon receiving an approach detection signal of the trolley hanger, the fork portion rotates toward the load lifter. By arranging the pusher that rotates forward so that it is directly above the trolley conveyor, items can be loaded safely and reliably while the trolley conveyor is moving.
It is an object of the present invention to provide a trolley conveyance device that does not cause deterioration in conveyance efficiency.

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

1 to 5 show an embodiment of the present invention, and in the figures, 1 is a trolley conveyor,
The trolley conveyor 1 consists of a suspension rail 2, a trolley chain 3, and a trolley body 4. The suspension rail 2 is formed into a loop shape using H-shaped steel, and the flange portion 2a of the H-shaped steel is formed in a cross section. This suspension rail 2 is installed on the ceiling beam of the building so that it is horizontal when viewed from the ceiling.
From the loading station 11 provided outside near the entrance/exit of No. 1, it passes through the building entrance/exit 40 to the first and second assembly stations 12, 13, turns back here, and passes through the building entrance/exit 40 again to the outside near the entrance/exit. It reaches the provided unloading station 14 and finally returns to the loading station 11 mentioned above.

Further, the trolley chain 3 is arranged slightly below and parallel to the suspension rail 2,
The trolley chain 3 is rotated clockwise in FIG. 1 (in the direction indicated by the arrow in the figure) by a conveyor drive device (not shown). The trolley chain 3 has two roller brackets 4a of the trolley body 4 connected to the trolley conveyor 1.
are installed and fixed at predetermined intervals in the front and back direction of the
Two guide rollers 4b are rotatably attached to the upper ends of the roller brackets 4a, facing each other, and the guide rollers 4b can run left and right in FIG. 3 on the flange portion 2a of the suspension rail 2. The two roller brackets 4a are connected by a connecting link 4c.

The upper end of a suspension member 6 of the trolley hanger 5 is fitted into the center of the connecting link 4c, and the suspension member 6 is rotated in the front-rear direction of the trolley conveyor 1 by a rotation shaft 6a. It is pivoted for free movement.

Also, the mounting flange portion 6 at the lower end of the suspension member 6
A mounting flange 8b provided on a fixed shaft 8 of the rotating device 7 of the trolley hanger 5 is bolted to b, and a bracket 8a integrally formed on the lower end of the fixed shaft 8 has front and rear Two rotation regulating members 8c are formed, the rotation regulating member 8c is cylindrical, and a steel ball 8d is disposed at its lower end so as to be movable up and down, and the steel ball 8d is disposed above it. It is constantly urged downward by a spring 8e. The upper end of a rotary shaft 9 is rotatably inserted into the fixed shaft 8, and the rotary shaft 9 is supported by the fixed shaft 8. At the bottom, there is a rotation regulating plate 9.
a is installed. The rotation regulating plate 9a has a circular shape, and four hemispherical locking recesses 9b are formed on the same circumference at 90° intervals on the upper surface of the rotation restricting plate 9a. It is adapted to be able to lock with the steel ball 8d. Further, a circular steady plate 9c is attached below the rotation regulating plate 9a of the rotating shaft 9, and a direction changing sprocket 9d is attached and fixed below it.

Further, a fork mounting bracket 10a is bolted and fixed to a mounting flange portion 9e formed at the lower end of the rotating shaft 9, and the upper ends of left and right fork pipes 10b are fixed to the fork mounting bracket 10a. The left and right fork pipes 10b are each approximately U-shaped, and are arranged in a bifurcated manner with the distance between them increasing downward, and their backs are fixed to each other by two upper and lower connecting pipes 10c. The lower fork portions 10d are arranged parallel and horizontally to each other, and the fork portions 10d are arranged parallel to each other and horizontally.
A mounting surface 10e is formed above 0d by fixing a flat plate. In addition, the left and right fork pipes 10
A disk-shaped dust cover 10f is fixed horizontally to the upper end of b, and this dust cover 10f is for preventing lubricating oil etc. from falling and adhering to the workpiece on the above-mentioned placement surface 10e. It is.

Further, a first 180° reversing device 15a, which is a first direction changing means, is arranged between the loading station 11 and the unloading station 14 on the upstream side of the loading station 11 of the trolley conveyor 1. A first 90° reversing device 16a, which is a second direction changing means, is arranged slightly upstream of the loading station 14, and a second 90° reversing device 16b is located slightly downstream of the loading station 11. A second 180° reversing device 15b is arranged slightly upstream of the reversing device 13. And these reversing devices 15a, 15b, 16a, 16b
consists of a side guide rail 18, a steady rest guide rail 19, and a direction change chain 20,
The side guide rail 18 is connected to the suspension member 6
mounting flange portions 6b, 8 connecting the fixed shaft 8 and the fixed shaft 8;
a guide plate 18a having a predetermined length disposed along the trolley conveyor 1 on both sides of b;
It is comprised of a plurality of side brackets 18b for attaching and fixing the guide plate 18a to a rotating device bracket 21 attached to a building beam or the like.
The steady rest guide rail 19 is a guide plate 1 that is disposed along the trolley conveyor 1 slightly above the steady rest plate 9c and has a predetermined length.
9a, and a plurality of steady rest brackets 19b for attaching and fixing the guide plate 19a to the rotating device bracket 21.

In addition, the first and second 180° reversing devices 15a, 1
The direction change chain 20 5b has a length of approximately 1/2 of the pitch circumference of the direction change sprocket 9d, and is disposed on the left side when facing the traveling direction of the trolley conveyor 1. 1st, 2nd
The direction changing chain 20' of the 90° reversing device 16a, 16b has a length of about 1/4 of the pitch circumference,
These direction change chains 20, 20' are arranged on the left and right sides respectively, and these direction change chains 20, 20' are attached to the mounting bracket 2.
It is fixed to the rotating device bracket 21 by 0a,
It is adapted to mesh with the direction changing sprocket 9d.

Further, a loading station 11 and an unloading station 14 below the trolley conveyor 1 are provided with a loading lifter 23 and an unloading lifter 24, respectively. Fixed frame 23a, 2
It is equipped with movable arms 23b and 24b that ascend and descend in the vertical direction along the axis 4a, and a pallet 32 for transporting a workpiece can be placed on the upper surface of these movable arms 23b and 24b. is for placing a large number of sheets 25, which are workpieces.

A pusher frame 26 is provided between the cargo lifter 23 and the unloading lifter 24, and the pusher frame 26 is slightly lower than the lower end surface of the trolley hanger 5, and the width of the trolley hanger 5 is The center portion of the air cylinder 27 is rotatably mounted on a cylinder bracket 26a formed on the right side of the upper surface of the pusher frame 26 (lower side in FIG. 4) by a rotation shaft 27a. There is. Further, two bearings 28 are attached to the front end of the upper surface of the pusher frame 26 (right end in FIG. 4), and a rotation shaft 29 is rotatably fitted into the bearing 28. A rotating lever 30 is fitted and fixed to the right end of the rotating lever 3.
0 is the piston rod 27 of the air cylinder 27
b is rotatably connected to the distal end thereof by a connecting member 27c. Further, two pressing levers 31a are fitted and fixed slightly inside the bearing 28 of the rotating shaft 29, and the left and right pressing levers 31a are connected by a connecting member 31b. ,
A pressing plate 31c is bolted and fixed to the right end portion, and the pressing plate 31c is formed so as to gradually become wider in the traveling direction of the trolley conveyor 1, and an abutting member 31d made of nylon or the like is provided on the front surface of the pressing plate 31c. It is fixed with adhesive etc.

Next, the operation will be explained.

First, the movements of the trolley hanger 5, sheet 25 and pallet 32 will be explained using FIG. At the loading station 11, the fork portion 10d of the trolley hanger 5 faces forward in the forward direction of the trolley conveyor 1, and in this state, the sheet 25 placed on the pallet 32 is placed on the fork portion 10d together with the pallet 32. This trolley hanger 5 is loaded on the loading surface 10e.
is the second 90° reversing device 1 in the direction shown by the arrow in the same figure.
When transported to the reversing station where 6b is located,
The trolley hanger 5 is rotated by the reversing device 16b around its vertical axis by 90 degrees clockwise in FIG.
It will face inward. When the trolley hanger 5 is transported to the first assembly station 12 in this state, the assembling worker takes out the seat 25 for the left seat in the direction shown by the white arrow in the figure. The trolley conveyor 1
Attach to the vehicle body (not shown) flowing below. Then, the trolley hanger 5 is moved to the second
The trolley hanger 5 is transferred to a reversing station with a 180° reversing device 15b, and is rotated by the reversing device 15b 180° counterclockwise around its vertical axis in the figure, and the fork portion 10d of the trolley hanger 5 is rotated 180° counterclockwise in the figure by the reversing device 15b. When the trolley hanger 5 is transferred to the second assembly station 13 in this state, the assembling worker takes out the one for the right seat from among the seats 25 in the same manner as above and starts the assembly work. will be carried out. When all the sheets 25 are unloaded in this way, only the pallet 32 is placed on the trolley hanger 5, and in this state, the trolley hanger 5 is moved to the first 90° reversing device near the building entrance 40. When the trolley hanger 5 is transferred to a reversing station 16a, the reversing device 16a rotates the trolley hanger 5 about its vertical axis by 90 degrees counterclockwise in FIG. It becomes a state facing the opposite direction, that is, a state facing backward.
In this state, the trolley hanger 5 is transferred to the unloading station 14, where the pallet 32 is unloaded, and the trolley hanger 5 is rotated around its vertical axis by the first 180° reversing device 15a. It is rotated 180 degrees counterclockwise, and the fork portion 10d is oriented in the above-mentioned direction and transferred to the loading station 11.

Next, the direction changing operation of the trolley hanger 5 at the reversing station will be explained. When the trolley hanger 5 is being transferred at a location other than the reversing station, the steel ball 8d of the rotation regulating member 8c provided on the fixed shaft 8 is engaged with the engagement recess 9b of the rotation regulating plate 9a of the rotating shaft 9. Therefore, the trolley hanger 5 is transported without rotating about its vertical axis.

When the trolley hanger 5 is transferred to the reversing station, the direction changing sprocket 9d meshes with the direction changing chain 20 for 180° rotation or the direction changing chain 20' for 90° rotation, and the trolley hanger 5 Rotates as the progresses. At this time, the steel ball 8d rises against the biasing force of the spring 8e and rolls in an arc on the rotation regulating plate 9a. , 20' rotate by 180 degrees and 90 degrees, respectively (see Fig. 4), and in this state, the steel balls 8d are locked with the locking recesses 9b, and as a result, the trolley hanger 5 is held in a predetermined position. It will be held at the angular position.

Finally, unloading and loading operations will be explained. When the trolley hanger 5 is loaded with only the pallet 32 and its fork portion 10d is facing backward,
When the movable arm 24b of the unloading lifter 24 is transferred to the unloading station 14, the movable arm 24b of the unloading lifter 24 is moved between the fork portions 10d of the trolley hanger 5, as shown by the two-dot chain line in FIG.
rise slightly higher. Then, the mounting surface 10e
The upper pallet 32 is transferred onto the movable arm 24b, and when the trolley hanger 5 passes over the unloading lifter 24, the movable arm 24b descends with the pallet 32 still placed thereon. In this manner, the pallet 32 is unloaded.

When the above-mentioned unloading is completed, the trolley hanger 5 is rotated 180° by the first 180° reversing device 15a,
The fork portion 10d faces forward, and in the loading station 11, a pallet 32 on which a large number of sheets 25 are placed is placed on the movable arm 23b of the loading lifter 23, and the movable arm 23b
rises slightly above the mounting surface 10e of the trolley hanger 5. When the trolley hanger 5 passes over the first 180° reversing device 15a and is transferred to the vicinity of the load lifter 23, an approach detection device (not shown) moves the trolley hanger 5 to the load lifter 23. It is detected that you are approaching
A proximity detection signal is emitted by the detection device. Then, the air cylinder 27 extends in response to the approach detection signal, and moves the rotating arm 30 from the position shown by the two-dot chain line in FIG. 5 to the position shown by the solid line as shown by the one-dot chain arrow in the figure. The pushing arm 31a also rotates in the clockwise direction, and as a result, the lower end of the back of the trolley hanger 5 is pushed forward, and the trolley hanger 5 moves forward around the rotation axis 6a of the hanging member 6. The fork portion 10d comes to be directly above the cargo lifter 23 mentioned above.
At this time, the upper end of the trolley hanger 5 is being pulled forward by the trolley chain 3 of the trolley conveyor 1, but its lower end, that is, the fork portion 10d, is stationary without moving forward for a while. The cargo lifter 23 is lowered, and as a result, the sheet 25 is lifted onto the pallet 32.
The sheet 25 and the pallet 3 are then transferred onto the placement surface 10e of the fork portion 10d, and in this way the sheet 25 and the pallet 3 are
2 is loaded.

In the trolley conveyance device of this embodiment configured and operated in this manner, when loading a workpiece, the fork portion 10d of the trolley hanger 5 faces forward, and the trolley hanger 5 is moved so that the fork portion 10d of the trolley hanger 5 is positioned toward the loading lifter 23. The fork portion 10d is rotated so as to be directly above it, and the fork portion 10d remains stationary for a while, during which time the sheet 25 is transferred together with the pallet 32, making the loading operation extremely safe.
It can be done reliably. In addition, when unloading a workpiece, since the fork portion 10d faces backward, the movable arm 2 of the unloading lifter 24
Push up pallet 32 with 4b and transfer it to this,
It is only necessary to wait for the trolley hanger 5 to pass and then descend, making it possible to unload the pallet 32 very easily.

In addition, in the above embodiment, the application was applied to conveying sheets for each pallet and collecting empty pallets, but the loading when the load is directly placed on the trolley hanger,
Needless to say, it can also be applied to unloading.

As described above, according to the trolley conveyance device according to the present invention, a trolley conveyor that constantly moves in one direction is provided, and the trolley body of the trolley conveyor has bifurcated fork portions for receiving luggage, and the trolley conveyor is provided with a trolley conveyor that constantly moves in one direction. A large number of trolley hangers are provided, which are suspended so as to be rotatable in the direction, and a loading lifter and an unloading lifter are arranged at predetermined positions below the trolley conveyor, and the loading lifter and the unloading lifter are arranged upstream of the conveyor from the loading lifter and above the trolley conveyor. A first direction changing means for rotating the trolley hanger so that its fork portion faces forward is arranged between both lifters, and the trolley hanger is placed upstream of the conveyor from the unloading lifter so that its fork portion faces backward. A second direction changing means for rotating the trolley hanger is disposed near the load lifter, and upon receiving an approach detection signal of the trolley hanger, the trolley hanger is moved forward so that its fork portion is directly above the load lifter. Since I placed a pusher that allows it to rotate,
It has the effect of making loading work extremely safe and reliable without reducing workpiece conveyance efficiency, and also has the effect of making unloading work very easy.

[Brief explanation of the drawing]

1 to 5 show a trolley conveyance device according to an embodiment of the present invention, FIG. 1 is a plan view showing its overall arrangement, FIG. 2 is a front view of the trolley hanger portion of the above embodiment, and FIG. The figure is its side view, No. 4
The figure is a plan view of the loading/unloading station and pusher portion of the above embodiment, and FIG. 5 is a side view thereof. DESCRIPTION OF SYMBOLS 1... Trolley conveyor, 4... Trolley main body, 5... Trolley hanger, 10d... Fork part, 15a... First direction changing means (first 180° reversing device), 16a... Second direction changing means (1st
(90° reversing device), 23...Loading lifter, 24
... Lifter for unloading, 27 ... Pushsha (air cylinder).

Claims (1)

[Claims] 1. A trolley conveyor is provided that constantly moves a large number of trolley hangers in one direction, and each of the above trolley hangers has a bifurcated fork portion for receiving cargo, which is attached to the trolley body of the above trolley conveyor around a vertical axis and in the front and back direction. The trolley conveyor is rotatably suspended, and a loading lifter and an unloading lifter are arranged at predetermined positions below the trolley conveyor, respectively. A first direction changing means for rotating the hanger so that its fork portion faces forward is disposed, and a second direction changing means for rotating the trolley hanger so that its fork portion faces backward is disposed upstream of the conveyor from the unloading lifter. A changing means is disposed, and a pusher is disposed near the cargo lifter for receiving an approach detection signal of the trolley hanger and rotating the trolley hanger forward so that its fork portion is directly above the cargo lifter. A trolley transport device characterized by: