SU1257023A1 - Roller conveyor for automatic transfer lines - Google Patents

Description

The invention relates to roller conveyors for automatic lines and can be used in cases when it is necessary to provide transportation of products with stops for performing technological operations.

The aim of the invention is to expand the technological capabilities of the conveyor by increasing the accuracy of positioning products and improving its reliability in operation.

FIG. 1 shows the proposed conveyor, front view i in FIG. 2, a section A-A of FIG. one; in fig. 3 - section bb FIG. 2; in fig. 4 shows a section bb of FIG. 2j in FIG. 5 shows a section of GGD FIG. 2; in fig. 6 is a sectional view of DD-D. 2; in fig. 7 shows section EE of FIG. 2 in FIG. 8 - section MF, FIG. 7; in fig. 9 — node 1 in FIG. one.

The roller conveyor (figs. 1 and 2) comprises a frame 1 on which at least three guides 2, 3 and 4 are fixed with flanges 5 and 6. Between the flanges, in the bearings 7, drive 8 and idle 9 rollers are installed in an alternating order symmetrically each other with axes located on the same level. The distance between the beads 5 and 6 of the guides 2, 3 and 4 is selected across the width of the cassette 10, which is U-shaped. The cassette has holes on top (not indicated) for free placement of fixtures.

11stabilitrons. Each clip 8

and 9 provided with a pair of elastic rings

12 and 13, respectively, rigidly fixed and tightened, such as rubber (Fig. 3 and 4).

The diameter D of the drive rollers 8 is selected (Fig. 5) large compared with the diameter d of the idler rollers 9 from the calculation

l) d +, + K,

Г5 - the sum of errors at 50 manufacturing and assembly of the conveyor, mm K - constant coefficient

(K, 0.4-0.6), determined experimentally and 55 depending on the weight of the transported product, on the material of the rings 12 and 13,

on the accuracy of manufacturing the cassette 10 contacting with the surface, in this case K 0.5; constant coefficient

(K 0.2–0.4), it was determined that the guaranteed excess of the diameter of the drive roller 8 over the idle diameter 9.

With increasing Y, the diving of cassette 10 (Fig. 6) increases, which increases the resistance to movement, while decreasing, the cassette can stop altogether, in this case Kj 0.3. K is also selected experimentally.

The drive rollers 8 and idle rollers 9 are installed respectively with a step H equal to

H

+

0

five

0

five

0

five

g de

L to vn

defined 1 and. -i at

tn 2 mm. When using the length of the cassette 10, mm the size of the gap horizontally between the drive roller 8 and the edge of the cassette 10 at the time of its stop, mm. With an increase in bp, the contact time of the transported cassette with two drive rollers decreases, and the print close to its movement stops. The value of m from the ratio of this case of the rolls of large diameters the value of (I) -d becomes significant, in which the use of the proposed conveyor is impractical. In practice, the diameter D of the drive rollers should be 15-30% of the pitch H. Drive rollers 8. rigidly connected to the driven sprockets 14. At the bottom of frame 1, the leading 15 and the tensioning 16 asterisks are located. The sprockets 14, 15 and 16 are covered by the chain 17. The asterisk 15 is connected to a drive (not shown). Between the guides 2 and 3, 3 and 4, in the zones I and PL of the conveyor, there are placed mechanisms (not indicated) of withdrawing the drive rollers from the product, stopping the product for performing the corresponding technological operations. Each mechanism (Fig. 2 and 3) is made in the form of two idle rollers 18 and 19 and the housing 20, inside of which a drive roller is placed

21. The housing 20 is rigidly fixed to the rods 22 and 23. The latter are spring-loaded, freely installed in the sleeves 24 and 25 and fastened to the upper part with a jumper 26. The drive for the housing 20 is placed inside the frame 1 and is made in the form of a two-armed lever 27 hinged on bracket 28 and pivotally connected to jumper 26 and core (not indicated) of electromagnet 29 fixed to bracket 30. Stroke stop 31 is fixed between rods 22 and 23. Above guides 3 and 4 in front of rollers 19 there are stops 32 and 33 electrically interconnected with withdrawal mechanisms, n example, via the fist microswitch and relays (not shown). The drive roller 21 and the idler rollers 18 and 19 are identical to rollers 8 and 9, respectively.

A store 34 (zone IV) is installed at the entrance of the conveyor, and at the exit a drive 35 identical to it in construction (zone V), rigidly mounted on frame 1. Store 34 and drive 35 each contain a box-shaped body 36, for example, of fluoroplastic, on The narrow side walls of which are hingedly mounted movable holders (not marked) of the cassettes 10. Each holder is made in the form of a Z-shaped swinging arm 37, hingedly connected by an upper arm with a core (not indicated) of the electromagnet 38 and pressed by a spring 39 to the plate 40. Ratio lower about shoulder height h f to the carrier selected on the basis of minimum nym / h 0,15.

With a decrease in the ratio, the dimensions grow, with an increase in reliability decreases, as the holders will open on the weight of the cassettes. In this example, the ratio is 0.13.

Under the magazine 34 and the accumulator 35, there are corresponding mechanisms (not marked) for feeding the cassettes 10. Each feeding mechanism is made in the form of an L-shaped, vertically movable platform 41 rigidly mounted on the rod 42 connected to the fist of the control shaft (not shown ). Platform 41 has two lodgments 43, made, for example, in the form of pins fixed

five

0

five

in a long shelf, parallel to a short one (not indicated) and having lead-in edges 44 and support surfaces 45 for accommodating a cassette. In the lower 5 position, the pins 43 are located in the grooves 46 made in the beads 5 and 6 of the guides 2 and 4. In this case, the supporting surfaces 45 are located below the level of the driving rollers 8 (Fig. 7).

0 In the loading zone 1 of the conveyor, the lead-in chamfers 47 under the cassette 10 (Fig. 8) are made on the inner edges of the flanges 5 and 6 of the guide 2, and the stop 48 is installed in the unloading zone IV. The conveyor operates as follows.

When the motor is turned on, the drive sprocket 15 continuously moves the chain 17, which, through the sprockets 14, rotates the drive rollers 8. In the initial position in the loading zone 1, the platform 41 of the cassette feeding mechanism is in its lowest position. The cassettes 10 are loaded into the store 34 by a robot or manually in a stack of 10 pcs. The lower cassette is positioned on the lower shoulders of the holders 37. At this point, the magazine platform 41 rises with the rod 42, the bolts 43 with their lead-in edges 44 abut against the lower cassette and center and slightly raise it above the shoulders P of the holders (Fig. 9), after

whereby the magnets of the magazine 38 are triggered and the holders 37 are deflected. The lower cassette is released, the platform 41 moves down, lowering the entire stack of cassettes. As soon as the plate form passes a distance equal to 1/2 the height of the cassette 10, the electromagnets 38 are turned off, the holders 37 under the action of the springs come back, the compartment and while holding

5, the penultimate cassette, .a the lower cassette with the platform continues to descend. When the store platform 41 reaches the lowest position, the cassette 10 comes into contact

0 with rollers 8 and 9 and begins to move along the conveyor until it stops 32 zones And stop. After that, the electromagnet 29 is turned off, the core rises. Due to the action lever.

5 27 and the springs the jumper 26 is lowered, acting through the rods 22 and 23 on the housing 20 with the drive roller 21; The housing 20 is lowering against the stop in -app

1. In this case, the cassette 10 is fixedly mounted on the idle rollers 18 and 29, out of contact with the roller 21. The full vertical course of the latter is 1.5-2 mm. At the same time, its sprocket 14 does not come out of engagement with the chain 17, after which the loose reinforcement of the Zener diodes 11 from the cassette 10 is transferred to the technological container-satellite (not shown) for processing. After the valve overload time (the loader makes 5 strokes with a cycle of 5 s), the electromagnet 29 turns on and its core retracts, moves the lever arm 27. Jumper 26, pushed with the other arm of this lever, rises to the limiter 31 strokes, the springs are compressed and the body 20 rises to its original position. At the same time, it stops the abutment 32 and releases the cassette. As the drive rollers 8 rotate continuously, the empty cassette is immediately moved by them to the second stop area 111 up to the stop 33.

The travel time of the empty cassette is 1-1.5 seconds. At the same time, the electromagnet 29 is disconnected and the corresponding case 20 is lowered with the drive roller 21 and the empty cartridge stops on the idle rollers 18 and 19. The positioning of the empty cartridge in the stop zone W is provided in the same way as the filled cartridge in the first

0

five

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ABOUT

zone P stop. After the time of group overload in the zone 111 of the processed fittings from the satellite, the outlet mechanism 20 of the cassette turns on in the socket of the cassette. The housing is raised, the stop 33 moves away, and the cartridge filled with exhausted reinforcement is guided to the discharge zone V. The switching on and off of electromagnets 29 in the zones Ts. 111 and of the stop occurs simultaneously. The cassette moves under the accumulator 35 up to the stop 48. The cassette feeder platform 41 in zone V is in the lower position. When the cassette 48 reaches the cassette 48, the platform 41 rises, the lead edges of the 44 pins 43 center the cassette and, resting on the latter, it rises into the accumulator 35. If the accumulator is not empty, the cassette abuts the lower cassette, after which the electromagnets of the accumulator 38 are triggered; figurative levers 37. The platform 41 rises until the upper plane of the cassette located on it passes the Cutoff Level, after which the accumulator electromagnets 38 are turned off, the holders 37 are pressed against the plates 40, holding the cassette, and the platform 41 is lowered. The cycle of operation is repeated. The electromagnets 29 and 38 are controlled, for example, by microswitches triggered by a control shaft, on which lifting cams (not shown) of the platforms 41 are fixed.

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Editor A.Gulko

Compiled by L. Rastorgueva

Tehred I. Veres Proofreader M. Maksimishinets

Order 4876/17

Circulation aZZPodpisnoe

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Claims (3)

1. ROLLER CONVEYOR FOR AUTOMATIC LINES, containing a frame, drive rollers mounted on the frame and mechanisms for removing drive rollers from the product, characterized in that, in order to expand the technological capabilities of the conveyor by increasing the accuracy of positioning of the products and increasing its reliability in operation, it is equipped with idle rollers installed between the drive rollers, and the surface of the drive rollers is located above the surface of the idle rollers, and each mechanism for removing the drive roller from the product is made yen in the form of a vertically mounted housing with a reciprocating motion on which the drive roller is located, the surface of the drive roller located on the housing when it is withdrawn from the product is located below the surface of the idle rollers, and the conveyor is equipped with movable stops, each of which is placed on product movement paths behind the corresponding drive roller retraction mechanism. 2. The conveyor according to claim 1, characterized in that it has a magazine and a drive, each of which is equipped with a drive 2-shaped spring-loaded levers. 3. The conveyor according to claim 2, characterized in that it is equipped with mechanisms for supplying products installed under the store and the drive.