DD143055A1 - CIRCULAR FEATURER WITH RADIAL ARMS - Google Patents

Abstract

The invention is useful in the intermediate loading of workpieces, the recorded, hiriweggeführt about memory locations or cached there and finally delivered, like especially in press streets. The aim of the invention is the radial Provide arms of a circular conveyor with a suitable drive, the transport of even large masses in exact receiving and Discharge positions functionally and quickly possible. Task of Invention is a circular conveyor with radial arms on one side stored in a frame mounted column and are rotatable about this, by each optionally with at least one common rotary drive can be coupled, with each arm between positions inevitably subject to a controlled speed curve. As a rotary drive is at least one step transmission with one of this driven and coaxial with the column mounted drive pulley provided, and between this driven pulley and each of the rotating Poor is a positive coupling, however, between each of the resting arms and the frame is a form-fitting Locking provided.

Description

Title of the invention

Circular conveyor with radial 'arms'

Field of application of the invention

The invention is applicable to the intermediate conveying of workpieces which are picked up, carried away via storage locations or temporarily stored there and finally delivered, in particular in press lines.

Characteristic of the known technical solutions

According to DE-PS 11 25 349 a carousel-like conveyor device is known for the transport of TextiO.waren, the objects automatically successively leads to several jobs, where they are subjected to a standstill treatment, so that they repeatedly change their state of motion · This device built carousel-like and provided with a fixed center column, sit on the radial support arms for the items to be transported unevenly in a circle movable. As drives, two circular rails are arranged concentrically with respect to the column, the outer ones of which run continuously and the inner one intermittently revolves around the column, and which alternately move the support arms over the support carriage arranged by each support arm. For this purpose, each arm is supported by means of a carrier carriage mounted in the roller on the outer rail and is by a curved pivoting of the

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If the friction is released by pivoting away the carrier, the rail moves away under the roller. A guide, on the other hand, controls a spring-pulled, pivotably mounted on the inner rail Plate, whereby a bolt from the carrier slide engages or releases, so that the desired arm is taken or released from this rail.

The coupling and force-transmitting elements are in this case designed in a Y / eise, which is suitable for the transport of only small masses, which is just in the case of transporting textile goods Pail · A key factor here is the KupplungslcraftSchluß, which then this solution However, this is a requirement in the automation of Y / erkstücktransportes within press lines a requirement · There are in particular heavy workpieces transported, which at a precisely positioned processing point in The machine or transfer point of an intermediate conveyor must be picked up and delivered to an exact acceptance or processing position · A forceful entrainment of these large masses to be transported provides a high residual energy when uncoupling, which continues to rotate the arm and prevents it in exactly Posi tion remains stationary · In order to guarantee this nevertheless, an additional expenditure of positioning elements was necessary.

Object of the invention

The aim of the invention is to provide the radial arms of a circular conveyor with a suitable drive, which allows the transport of large masses into accurate receiving and dispensing positions functionally reliable and speedy.

Presentation of 7 / esens the invention

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The problems of the known solutions have the following technical causes:

- The jerky and bumpy coupling or »uncoupling of the arms with their .Antrieb at

- Waiver of braking or positioning.

It is an object of the invention to provide a circular conveyor with radial arms which are mounted on and rotatable about a column mounted in a frame by each with at least one common rotary drive can be coupled, each arm between the positions inevitably controlled Speed course is subject.

According to the invention this is achieved in that at least one indexing gear is provided with a driven by this driven as coaxial to the column output disk, and between this driven pulley and each of the rotating arms a shapely coupling, however, between each of the stationary arms and the frame is provided a positive locking. The step gear is designed as a cam step. As a positive coupling and locking a driving star is rotatably mounted on each arm on a shaft,. the axis of which intersects the longitudinal axis of the arm at right angles and whose concentric trajectory to the column is located centrally between gaps for coupling and recesses for locking, of which the gaps provided on the circumference of the disk formed as Bastenscheibe and the recesses are fixed to the frame a ratchet wheel rotatably connected, and on the side of the ratchet wheel next to each recess a pawl is mounted in a frame-fixed guide, and the recess at least one in; Finding

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Gap is arranged in a vertical plane. In particular, two cam step gear, each with a detent disc are provided, wherein the two detent disks are mounted coaxially to each other and to the column and in their detent each have a gap of one with a gap of the other detent disc and at least one recess in a level.

The choice of a stepper drive makes it possible to give a movement a certain intermittent speed course. The particular curve of a cam gear, e.g. in the form of a sinoid, results in a completely jerk-free and shock-free movement between two standstill positions. The positive entrainment of each arm by such an Atitrieb allows the safe transport of even large masses in exact positions corresponding to the standstill positions, where the speed drops to Mull, so that the arm stops with the workpiece during the rest time of the stepper drive.

A favorable speed drop and increase also absorbs the kinetic energy and gradually brings the respective arm to a standstill, so that the functional transport is also secured for a workpiece resting on only a suitable base of the arm. If a longer standstill time is to be realized, as it allows the detent «- time of the step drive, Z" B _o as intermediate storage positions, the positive connection between the arm and the stepper drive is released and to lock the arm position for Wiederabholen a Fonnschluß between the Arm and frame produced «The arrangement of two stepper drives also offers the advantage that it can be used as needed with a shorter or longer rest time by the two KurVenkorper ^ Tait different speeds are operated» It can also operate the two stepper drives with different directions of rotation be what

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is particularly advantageous for a quick stacking of the workpieces, because it can then arms between a central dispensing position and arranged on both sides of the same stack arranged pendulum · '...-.

embodiment

The invention will be explained in more detail below with reference to two exemplary embodiments.

In the accompanying drawings show:

Pig «· 1 the top view of a circular conveyor with a. Step gear after section I - I in Pig. 2nd,

Pig · 2 a section along line II - II in Pig · 1.,

Pig. 3 shows a cross section through a circular conveyor with two step gears;

Pig. 4 the detail "A" in Pig. 2 ·, Pig. 5 the detail ¹¹ B "in Pig. 3 ·

In Pig. 1 shows a frame 1 in plan view, from which a column 2 protrudes in the center. In Pig. 2 it can be seen that the column 2 is fixed with its foot in the frame 1 and its upper part serves as a centric Lager'für radial arms 3, which are rotatable about the column 2. There are two arms 3 are shown, which are opposite each other. However, the bearings on the column 2 have a total of four arms. Each of the arms 3 carries at its free end receiving elements 4 for indicated "workpieces and further inside a downwardly projecting bearing block 5, which receives a shaft 6 whose axis crosses the longitudinal axis of its arm 3 at right angles.

According to FIGS. 2 and 4, on each of the shafts 6, both a driving star 7 and a ratchet wheel 8 are freely rotatably mounted, which are rotationally rigidly connected to each other.

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1 or on its cover plate pawls 9 are slidably mounted in a horizontal Pühr 10 at six evenly distributed over a circumference points by. each of a piston-cylinder system 11 is articulated on the frame 1 or on each of the guides 10 mounted thereon are provided in a horizontal plane extending radially to the column 2 recesses 12 together. From Pig. 1 and 2 it can be seen that on the column 2 under. Furthermore, a detent disc 13 and a gear 14 are freely rotatably mounted and rotatably connected with each other "Fig. 1 shows that the detent disc 13 with six radially directed and uniformly distributed over the circumference gaps 13 a is provided ο The number of Gaps 13 a thus corresponds to that of the recesses 12, wherein in each case at standstill of the detent disk 13, a gap 13 a of a recess 12 is opposite.

The gear 1 # meshes with a gear 15 which is also mounted in the frame 1 and is driven by a stepper «The step gear consists of the trained as a roller star gear 15, which for this purpose on its downwardly directed plan side with evenly over a circumference Since it is a cam step gear, the cam body 17 carries at its periphery the necessary Pührungskurve, which is similar to a screw on both sides open, but for the generation of the desired detent in contrast to the worm over a range of its course is designed as a straight guide, so there has no slope. These transmissions are known per se, which is why a more detailed description was omitted · The same applies to the drive for the cam body 17 * To Pig. 1 it should be emphasized that the illustrated driving star 7 of the four arms 3 each rest with a tooth either in a recess 12 or in a gap 13 a. Each arm 3 is thus either with the frame 1 or with the step-

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connected. The two-dimensional representation in Pig; 1 'does not show the individual spatial conditions as illustrated in Pig. 4 in a section.

The operation of this conveyor is as follows: The cam 17 is driven continuously and thus runs around constantly. With each revolution, a roller 16 is detected from the open beginning of the guide curve, moved along the curved path and released at its open end, while the next roller 16 is detected in front. Since the curved path is provided with slope-affixed sections at the beginning and at the end, the gear 15 is rotated without interruption, as long as a roller 16 is taken from the slope at the end of the cam track and the next roller 16 from the slope at the beginning of the curved path. The toothed wheel 15 drives the toothed wheel 14 and, with it, the detent disc 13. From the revolving reamer 13, those of the arms 3 which are coupled to it are taken along. This coupling is provided when, according to Pig. 4, a tooth of the entrainment star 7 enters a gap 13 a of the detent disk 13 is engaged · Thus, this Mitnähmestem 7 is gestellentkuppelt, ie the recesses 12 are contactless between the teeth of this and all other gestftkuppelten entrainment star 7, so that the associated arms 3 can be taken by the frame 1 unhindered by the drive ·

About the entrainment is decided by operating corresponding pawls 9 with the aid of the controlled piston-cylinder systems 11. This operation is only .Während the standstill of the detent disc 13 This standstill is to be recorded as long as the stepless part of the guide cam of the rotating cam 17 acts on the guided roller 16 * So one or more of the arms 3 remain in their locking positions, which they through

assume the previous entrainment, so the KoI "Ben-cylinder system 11 of the respective detent position is charged, so that the associated pawl 9 is moved, which rotates the ratchet located in this 8 ratchet and its driving star 7. The individual Mitnähmesterne 7 are designed that a feed of a pawl 9 simultaneously releases the one clutch while the other is being made. A step in the direction of the arrow of 3 ° means that the driving star 7 disengages from the detent disk 13 or a gap 13a and at the same time engages in the recess 12 on the frame 1 · Thus, a so controlled arm 3 is fixed to the frame coupled and does not participate in the next movement step of the detent disc, because now the detent disc 13 between the teeth of the frame fixed coupled Mitnahraesternes' non-contact rotates.

The Sransportgeschehen determines which pawls 9 are operated to rotate the respective driving starter 7, so that the corresponding arms 3 solved either with the beginning of a detent position of the step gear for caching the .Antrieb and locked in place or fixed for further transport from the .Arretierung and again with be coupled to the .Antrieb. If, in a latching position, no actuation of the pawl 9 which has been oiled there takes place, no coupling state is changed. This means, on the one hand, that the arm 3 in position still remains fixed to the frame, and, on the other hand, the arm 3 retracted into the position continues to be drive-connected and moves on to the next drive step DJi the next locking position, which presupposes this is not occupied. This coordination takes place in the control of the piston-cylinder systems 11.

A further development of the inventive concept is the solution nacli S ¹ Ig, 3 represents. Ss are there in the frame 1 two step gear 18; 19 arranged and accordingly also

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two detent washers 20; Each latching position of the detent washers 20, 21 is superimposed on an opening 20 a and a gap 21 a in a vertical plane on top of each other, each of which is provided with gaps 20 a "or 21" a , which is illustrated in Figo 5 Likewise em frame 1 are respectively ₀ on each of the guides 10 in a horizontal plane above the other two "notches. 22; 23 are provided, each of which a gap 20 a; 21 a facing, when the latch plates 20 and 21 The arms 3 are provided on the respective bearing block 5 with a respective driving ester 24, which in turn is connected in a torsionally rigid manner to a ratchet wheel 8 which is actuated by pawls 9 arranged in the individual positions and 5 are not shown in detail, but are known from Figures 2 and 4.

The mode of action of this conveyor is in principle as the previously described, only now is twice the number of coupling options, so the driving star 24 are designed differently than the driving star 7 · Their design is tuned to the operating principle, after which a movement step of the ratchet wheel 8 his Ann 3 either released from the drive and locked at the same time fixed to the frame or detached from the frame 1 and the drive side couples.

This means that in a moving step of the ratchet wheel 8 in the arrow direction of FIG. 5, a tooth of Lütnahmesternes 24 leaves the gap 21 a, while in the direction of motion da «behind other tooth snaps into the recess 2.2.

During the next movement step, this tooth leaves the recess 22 again, while the tooth lying in front of him in the gap 20 a latched in the next movement step, this tooth leaves the gap 20 a again, while

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the third tooth engages in the recess 23. In the next movement step, the third tooth leaves the recess 23 v / re and after one revolution of the driving star 24 the condition of FIGS. 3 and 5 is restored. the first embodiment pointed out that each of these switching states can also remain while the drive weiterschalte-t »The movement steps of the ratchet wheels 8 is not to the detent discs 13; 20; 21 · The above described movement steps should only show the coupling possibilities which allow the arm 3 either to be connected to the indexer 19 as shown or to be fixed to the frame after the next step or connected to the indexer 18 after the next step or to the next step locked again fixed to the frame or connected to the next step v / ieder as shownc The arm 3 is thus in each of the possible positions of his entrainment st ernes 24-solved either frame side and connected to one of the drives or solved on the drive side and fixed to the frame * Each of these positions lets the relative movement of the dissolved gaps 20 a, 21 a or · recesses 22; 23 to the driving star 24 between his teeth without disabilities too.

The advantage of two indexing gear is the ability to provide them as needed either with different speeds or with different directions of rotation or both, so that the movement steps of the arms 3 under the condition of a mutual control engineering vote are very adaptable and the transport process so much variabeD , can be designed *

It should be noted that the position of the gaps 13 a, 20 a, 21 a and recesses 12; 22; 23 in the vertical plane and the design of Mitnähmesterne 7 »24 is not bound to the representations, but with the

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Movement steps generated by the respective pawl 9 is tuned so that the principle of simultaneity of drive-side clutch and rack-side release operation or by gestellseitigem locking .und drive-side release operation and beyond is ensured that the teeth of the driving star 7; 24 does not hinder the relative movement between the drive and the frame.

Claims (5)

- 12 - 212 417 Invention claim 1. Circular conveyors with radial arms which are mounted on and rotatable about a column mounted in a frame, in which each can optionally be coupled with at least one common rotary drive, characterized in that at least one indexing gear (15, 16, 17, 18, 19) is provided with a driven pulley (13, 20, 21) driven by the latter and coaxial with the pillar (2), and between this output pulley (13, 20 21) and each of the rotating arms (3) a positive coupling (7; 24; 13 a; 20 a; 21 a), whereas between each of the stationary arms (3) and the frame (1) a positive locking (7; 24, 12, 22, 23). 2. Circular conveyor according to item 1,
characterized, the step transmission (15; 16; 17; 18; 19) is designed as a cam step transmission » 3 · Circular conveyor according to items 1 and 2, characterized that as a positive coupling and locking a driving star (7; 24) on each arm (3) on a V / elle (6) is rotatably mounted whose axis crosses the longitudinal axis of the arm (3) at right angles and the column (2) concentric Movement path centrally between gaps (13 a, 20 a, 2.1 a) for coupling and recesses (12; 22; 23) is arranged for locking, of which the gaps (13 a, 20 a, 21 a) at tSnfang the as Eastenscheibe ( 13, 20, 21) and the recesses (12, 22, 23) are fixed to the frame 1 * 212 417 4. circular conveyor according to item 1 to 3, characterized that each Mitnähme stern (7; 24) rotatably connected to a ratchet wheel (8) and on the side of the ratchet wheel (8) next to each recess (12; 22; 23) a pawl (9) is mounted in a frame-fixed guide (10) , and the recess (12; 22; 23) is arranged at least with a gap in the detent position (13 a, '20 a, 21 a) in a vertical plane. 5 · Circular conveyor according to item 1 to A-, characterized in that two cam step drives (18, 19) each having a detent disk (20, 21) are provided, wherein the. two notched discs (20; 21) to each other and to the column (2) are mounted coaxially and in their detent. position is ever a gap (20 a) of the one with a gap (21 a) of the other detent disc (20 or · 21) and at least one recess (22; 23) are in a plane ₀  For this JL pages drawings