JPS62157106A - Rack lowering device - Google Patents

Abstract

PURPOSE:To make it possible to efficiently load a plurality of plate materials successively onto respective racks, by surely and rapidly lowering several racks which are leaped up obliquely upward above a book storing carriage, one by one down to a horizontal position in a mechanical manner so that the racks are associated with a loading conveyer. CONSTITUTION:When the loading of four treads onto a rack 32 is completed, an elevator 83 is elevated while a movable plate 84 is advanced, and a hook holding device 92 is moved as indicated by the two-dot-chain lines, G-H-I-J so that a rod 94a abuts against a hook 32a at the position J. When a spring 96 is depressed, the hook 32a is clamped between upper and lower rods 93a, 94a to hold the rack 32, and a support arm 101 is rotated downward to stand by. Then, the elevator 83 is lowered while the hook holding device 92 is moved along an arcuated locus down to the position K to downward rotate an arm 99 which therefore holds the rack 32 at the position K against the upper surface of a carriage, and a cylinder 91 extends so that the hook holding device 92 is retracted to the position G. Meanwhile, the support arm on standing by is rotated again upward to support stacked racks at the bottom of the latter. Thus, it is possible to efficiently load plate-like materials or the like onto a book storing carriage.

Description

[Detailed Description of the Invention] Industrial Application Fields The present invention comprises stacking a large number of shelves in a vertical direction, biasing these shelves to tilt upwards, and rotatably opening each column. The present invention relates to a so-called shelf unloading mechanism that sequentially lowers the shelves of a storage book truck for loading plate-shaped materials such as tire treads with one side pivotally supported on a platform.

Conventional technology> In general, tire treads are continuously extruded as a strip using a rubber extruder, cut into strips of fixed length one after another, and then cut into a strip that runs intermittently at right angles to the line of the rubber extruder. A plurality of sheets are placed on a conveyor at predetermined intervals and transferred as they are to a loading conveyor provided at the end of this alignment conveyor. The loading conveyor can move up and down according to the height of the horizontally lowered shelf of the storage book cart waiting at the end thereof, and can also move horizontally so as to approach and separate from the shelf. The plurality of tire treads placed on the upper surface are loaded on the shelf all at once by vertical movement, horizontal movement, and belt running.

In this loading process, conventionally, a worker near the storage book cart manually rotates the shelves, which are biased upward to tilt them one by one, to a horizontal position in accordance with the movement of the loading conveyor. The above-mentioned side is pressed down until a plurality of tire treads are unloaded and transferred from the loading conveyor to this shelf. Once the tire tread has been transferred, the weight of the tire tread will no longer cause the above-mentioned side to flip up due to the biasing force of a spring or the like, and the worker will similarly lower the next shelf to a horizontal position.

<Problems to be Solved by the Invention> However, in the conventional loading method described above, unloading of the storage book cart is done manually, and the lowered shelves must be held by hand until the tire treads are transferred. In addition to forcing workers to perform time-consuming and complicated work, there is a high possibility that the timing of unloading the shelves may not match the movement of the loading conveyor, leading to a high possibility that the tire treads will not be loaded properly.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to be able to accurately and quickly lower a large number of shelves raised diagonally upward of a storage book cart to a horizontal position one by one using mechanical force, to be able to link with a loading conveyor, and to An object of the present invention is to provide a shelving device that can efficiently load plate-like materials onto six shelves one after another.

Means for Solving the Problems> In order to achieve the above object, the shelf unloading device of the present invention stacks a large number of shelves vertically, urges these six shelves to tilt upward, and rotates them. A column stands upright at the loading position of a storage book cart with one side of six shelves pivoted on the platform, a lifting platform attached to this column and driven up and down, and a horizontal or vertical drive platform attached to this column. An arm attached to be driven to rotate inside, and fixed to the tip of this arm,
It is characterized by comprising a hook holding device that removably engages with the hooks provided on the six shelves of the storage book cart, and lowers the six shelves to a horizontal position.

<Operation> The empty storage book cart with a large number of shelves raised diagonally upward travels to the loading position and stops.

Next, the lifting platform of the shelf unloading device rises, and the arm attached to this lifting platform is horizontally or rotationally driven toward the tip of the bottom shelf, and the hook holding device at the tip of the arm is fitted into the hook on the above side. Get stuck in.

Next, the lifting platform is lowered, the arm is driven in the opposite direction, and the hook holding device moves downward in an arc with the hook inserted, and the above side is rotated to lower it to a horizontal position. . At this time, for example, a loading conveyor carrying a plurality of plate-shaped materials as items to be stored enters above the lowered shelf, and then retreats while running a belt forward to remove the plate-shaped materials. Load on the above side. When the plate-like material is loaded, the weight of the shelf no longer causes the shelf to be lifted up by the biasing force, and the hook holding device disengages from the hook on the side and lifts the lifting platform again and drives the arm to lift the shelf to the next position. Move towards the end of the shelf where you should lower it.

<Example> Hereinafter, the present invention will be explained in detail with reference to illustrated embodiments.

FIG. 1 is a side view of the storage book cart mechanism, in which many or several shelves 32 are stacked vertically, the six shelves are biased by springs 32b so as to be tilted diagonally upward, and the six shelves are freely rotatable. A storage book trolley with one side of the shelf pivoted on a stand; 16 is a column installed at the loading position of the storage book trolley 10; 83 is a lifting platform attached to the column 16 and driven up and down; 86a is the lifting platform; An arm 92 attached to the movable plate 84 attached to the stand 83 so as to be rotationally driven is fixed to the tip of this arm 86a, and is fitted into a pin-shaped hook 32a provided on the six shelves 32 of the storage book cart IO. A hook retaining device releasably engaged with the column 16. Lifting platform 83.
The arm 86a and the hook holding device 92 constitute the shelf unloading device 21.

The column 16 is erected on a base 13 that is driven up and down by a table lifter, and the gate-shaped upper protrusion 16a overlaps the rear thereof, and the upper ends of these are connected by two joint members 16c, Connected by I6c, storage book trolley 1
Rails 81 are vertically provided on two opposing surfaces of the two vertical columns 16d on the 0 side. The shelf unloading device 21 connects four wheels 82 provided on both sides to the two rails 81.
A box-shaped elevating table 83 connects both ends of the dean 20, which is driven by an air cylinder 23 at the upper and lower ends, and a shaft 8 is connected to guides 83a, 83a protruding from this elevating table.
It consists of a movable plate 84 into which 4a and 84a are inserted horizontally, and this movable plate is moved forward and backward by a rod 85a of an air cylinder 85 fixed to the center of the elevating table 83.

One end of the arm 86a is connected to the tip of the movable plate 84 with a pin 87, and then the approximate center of the link 86b is connected with the pin 87.
8, and the tip of the rod 91a of the air cylinder 91 fixed obliquely to the upper part is connected to one end of the link 86b with a pin, while the other end of this link 86b and the approximate center of the link 86a are connected with a pin 89.90. The arm 86a is connected by a link 86c via a link 86c, and by the action of the rod 91a and the quadrilateral link mechanism, the tip of the arm 86a is moved in an arc along the rotation locus of the tip of the shelf 32, as shown by the broken line. ing. A U-shaped hook holding device 92 is fixed to the tip of the arm 86a, and this hook holding device 92 has two small air cylinders 9 for hooks at the upper front side.
3. When the air cylinders 94 are installed vertically, the rear lower end 95b of the two-pronged temporary 95 is fixed to this air cylinder, and a spring 96 is compressed below the air cylinder 94. The rod 9 also serves as the lower hook of the air cylinder 94 that protrudes through the front lower end 95a of the temporary contact 95.
4a comes into contact with a lip 32a protruding from the side surface of the front end of the shelf 32 on the storage book cart, and when the spring 96 is pressed down via the abutment 95, a proximity switch (not shown) is pressed down.

), the rod 93a that also serves as the upper hook of the upper air cylinder 93 protrudes as shown in the figure, and the upper and lower rods 93
a, 94a are designed to hold the shelf 32 by sandwiching the lid 32a.

On the other hand, four splicing materials 16e and 16e' are attached to the column 16 so as to straddle the loading chain conveyor 9.

16r and 16f' are passed, and the front lower joint material 1
A shelf holding device 97 as a shelf holding member is provided near both ends of the shelf 68', and a shelf supporting device 98 is provided approximately at the center of the joint material 16e at the upper front surface. In the shelf holding device 97, the base end of a holding arm 99 having a holding part 99a at the tip and a triangular plate 99b at the base is supported by the joint material 16e', and the rear apex of the plate 99b is attached to the air cylinder 100. It is connected to the rod 100a with a pin, and the rear end of this air cylinder is fixed to the column girder 16g via the pin.

Then, by the protrusion of the rod 100a, the holding part 99a at the tip of the arm is rotated downward as shown by the broken line in the figure, and this holding part is used near the ends of both sides of the shelf 32 that has been lowered by the above-mentioned shelf unloading device 21. is pressed against the upper surface of the trolley 10 against the spring 32b to keep it in a horizontal state.

In addition, similarly to the above-mentioned shelf support device 98, a support portion 10 is provided at the tip.
1a, the base end of a support arm 101 having a triangular plate 1O1b at the base is supported by a pin on the protrusion of the joint member 16e, and the rear apex of the brake zotb is attached to the air cylinder 1.
02 rod 102a, and the rear end of this air cylinder 102 is fixed to the column girder 16h via the pin. Then, by protruding the rod 102a, the support portion 1ota at the tip of the arm is rotated upward as shown by the broken line in the figure, and the upper and lower hooks (93a, 94a) of the hook holding device 92 of the shelf unloading device 21 move the shelf 32 upwardly as shown by the broken line in the figure. When the shelf 32 is not held in this position, the central tip of the shelf 32 is supported from below together with the shelf overlapping above.

FIG. 2 shows a side view of the tire tread transfer device equipped with the storage book cart mechanism shown in FIG. The conveyor 4, the roller conveyor 5, and the third branch chain conveyor 6 are installed in series on the upper surface of the pedestal 11 at the same height. The loading conveyor 9 is moved forward and backward toward the storage book cart IO on a fixed frame 14 fixed to a base 13 that is driven up and down by a table lifter 12 with a pantograph structure provided at the bottom of the pit B. It is attached to the frame 15. A gate-shaped column 16 is installed on the base 13 so as to straddle the loading conveyor 9, while a guide post l is installed on the base B at the bottom of the pit B.
7 and 17 are vertically provided, and as the column I3 moves up and down, the column 16 is guided through four guide rollers 18 provided on both sides thereof. A sprocket 19 is pivotally supported at the four corners of the upper protrusion 16a on one side of the column, a chain 20 is stretched over the sprocket 19, and the elevating platform 83 of the shelf unloading device 21 is fixed to the chain 20 toward the storage book cart IO side. On the other hand, the tip of the rod of the drive cylinder 23 attached to the column 16 is fixed to the chain protrusion 20a on the opposite side, and the lifting platform 83 is raised and lowered. The stock chain conveyor 7.8 is housed in a common frame 24 with both ends of its sprocket shaft pivoted, and this frame 24 has one end pivoted (P) to the pedestal II and the other end attached to the lower part of the frame 24. The mounted wheels 25 are placed on the frame support stand 16b protruding from the column I6, and the column 1
6, it rotates around the fulcrum P as shown by the two-dot chain line. For example, the rotation angle is ± relative to the horizontal line.
It is lO°.

The storage book cart IO has a main wheel 26 at the center of the lower part and auxiliary wheels 27, 27 on both sides, and has a mount 2 in the pit B.
The chain conveyor installed at 8 is driven by 29°29,
It travels on a rail 30 laid in the center of the frame, and is positioned at the loading position by a stop positioning device (not shown).

On the other hand, on the upper part of the storage book cart 10, there are a number of shelves 32 for storing tire treads, each of which is rotatably supported at one end.
32. ...are provided overlapping each other.

The operation of the storage book cart mechanism having the above configuration will be described below.

(a) From the state shown in FIG. 2, the moving frame 15 is driven backward by the motor, and the moving speed of the moving frame 15 is set to be approximately equal to the running speed of the loading chain conveyor 9. The four treads arranged on the top 9 are transferred onto the shelf 32 in order starting from the first tread.

(b) The moving frame 15 is the stock chain conveyor 8
When it retreats to the contact position, it stops, and the loading of the four treads onto the shelf 32 is completed.

(c) When the loading of the four treads is completed in this way, the lifting platform 83 of the shelf unloading device 21 shown in FIG. The hook holding device 92 at the tip of the arm 86a, which is moved forward by the protrusion of the rod of the air cylinder 85 and is attached to the movable plate 84, moves along the two-dot chain line ( G
-Move like I (→I-J). At position J, the constantly protruding rod 94a of the air cylinder 94 on the lower side of the hook holding device 92 comes into contact with the hook 32a at the tip of the shelf 32 under the guidance of the abutting plate 95.

(d) When the rod 94a comes into contact with the hook 32a, the spring 9
6 is pressed down, the rod 93a of the upper air cylinder 93 protrudes under the action of the proximity switch, and the upper and lower rods 93a, 94a hold the hook 32a and hold the shelf 32. At this time, the support arm 101 of the shelf support device 98, which had been supporting the shelf 32 from below, is moved to the air cylinder 1.
When the rod of 02 is retracted, it rotates downward and waits.

(e) The rod of the air cylinder 23 protrudes and lifts the platform 83.
is lowered, the rod of the air cylinder 91 protrudes approximately 80%, and the hook holding device 92 grips the shelf 32 and descends to position K in a circular arc as shown by the broken line in the figure. At this time, the arm 99 of the shelf holding device 97 rotates downward due to the protrusion of the rod of the air cylinder 100, and presses the shelf 32 at position K up to the top surface (position) of the cart, and the upper side of the hook holding device 92. The rod 93a of the air cylinder 93 is retracted, the air cylinder 85a is retracted, the air cylinder 91 is 100% protruded, and the hook holding device 92 is retreated to position G. Meanwhile, the above support arm 1 was waiting.
01 is rotated northward again by the cylinder 102 and supports the overlapping empty shelves from below.

(f) While the shelf unloading device 21 is performing the operations (c) to (d) above, the chain conveyor 9 on the movable frame 15 in (b) has four wires from the stock chain conveyor 8 in contact with it. The treads have been transferred at a predetermined distance from each other, and at this point, the table lifter 12 is raised by one shelf, and the moving frame 15 is driven forward, so that the chain converter 9 moves to the position above the new shelf 32. It moves to the position shown in Figure 2.

In this way, by repeating the operations (a) to (f) above, four treads are loaded onto the shelves 32 of the storage book cart IO from the bottom, completing the loading of all the shelves. Finally, the storage book cart 10 fully loaded with treads is transported to a chain conveyor 29 installed on a pedestal 28 under the floor at the loading position.
The empty cart is then moved to the ejection position on the rail 30, and then the empty cart is carried in in the same manner, and is positioned at the loading position by a stop positioning device (not shown). On the other hand, the table lifter 12 is operated, the base 13 is lowered, and the bond chain conveyor 9 is lowered to the horizontal holding position of the lowest shelf.

In the above embodiment, the arm 86a of the shelf unloading device 21 is attached to the movable plate 84 and driven horizontally, and also rotated by the air cylinder 91, so that the hook holding device 92 can be moved along the rotation locus of the tip of the shelf 32. This allows for easier circular arc movement in a circle m. Further, the hook holding device 92
is pushed down through the two air cylinders 93 and 94 for holding the hook, the contact plate 95 that fits into the lower air cylinder 94, and the contact temporary 95, and the upper air cylinder 93
Since the groove is functionally formed by the spring 96 that operates the hook 32a of the shelf 32, the hook 32a of the shelf 32 can be reliably fitted into and removed from the hook 32a. Further, since the shelf holding device 97 and the shelf supporting device 98 are provided, it is possible to reliably hold the shelves during loading and to hold the empty shelves stacked diagonally upward.

It goes without saying that these effects further improve the efficiency of loading operations.

<Effects of the Invention> As is clear from the above description, the shelf unloading device of the present invention stacks a large number of shelves in the vertical direction, urges each of these columns to tilt upward, and makes them rotatable. A column installed vertically at the loading position l of a storage book cart with one side of each column pivoted on the stand;
A lifting platform is attached to this column and driven up and down, an arm is attached to this lifting platform to be driven horizontally or rotated in a vertical plane, and a two-leg storage book trolley is fixed to the tip of this arm. It consists of a hook holding device that removably engages with the hooks provided in each column, and each column is lowered to a horizontal position, so the many shelves that have jumped up diagonally above the storage book cart can be moved by mechanical force. It can be lowered one by one to a horizontal position accurately and quickly, and can be linked with a loading device such as a loading conveyor, improving the efficiency of loading continuously fed plate materials etc. onto storage book carts. Contribute greatly.

[Brief explanation of drawings]

FIG. 1 is a side view of a storage book truck mechanism of the present invention, and FIG. 2 is a side view of a tire tread transfer device equipped with the storage book truck mechanism. 8.Stonok chain conveyor, 9.Bond-containing chain conveyor, 10.Storage book cart, 16.Column, 21.
・Shelf unloading device, 32...Shelf, 32a...Hook, 3
'2 b... Spring, 83... Lifting platform, 84... Movable plate, 86a... Arm, 92... Hook holding device, 9
7...Shelf holding device.

Claims (2)

[Claims] (1) At the loading position of a storage book cart, in which a large number of shelves are vertically stacked, each shelf is biased to tilt upward, and one side of each shelf is rotatably supported on a stand. An upright column, an elevating platform attached to the column and driven up and down, an arm attached to the elevating platform so as to be horizontally driven or rotated in a vertical plane, and the above-mentioned A shelf unloading device comprising a hook holding device that removably engages with hooks provided on each shelf of a storage book cart, and lowering each shelf to a horizontal position. (2) Shelf lowering according to claim 1, further comprising a shelf holding member pivotally connected to the column and rotationally driven to press down the shelf lowered to a horizontal position from above. Device.