DE2232818A1 - ROLLER CONVEYOR WITH STORAGE EFFECT - Google Patents

Description

Au 9 5 1972 new number

Herne, 8000 Munich 23,

Freiiigrathstrasse 19 r »-. Ii ^ _r> ije-.i_- Eisenacher Strasse 17

P.O. Box 140 Dipl.-Ing. RH Bahr _Pa t-Anw. Betzler

Dipl.-Phys. Eduard Betzler ■

⁵¹⁰¹⁴ Dipl.-Ing. W. Herrmann-Trentepohl 39 so 13

Telegram address: ^{r w} Telegram address:

Bahrpatente Herne PATENTANWÄLTE Babetzpat Munich

Telex QS 229 853 Telex 5215360

Γ · ~ | Bank accounts: ^

Bayrische Vereinsbank Munich 952287 Dresdner Bank AG Herne 7-520 499 Postal check account Dortmund 558 68

Ref .: MO 3471 Ii / hr

please indicate in the answer

Please send a letter to:

Collection box 3

. June 1972

Rapistan Incorporated, 507 Plymouth Road, IT, E., Grand Rapids, Michigan / USA

Roller conveyor with a jam effect

The invention relates to roller conveyors with a jam effect and is particularly directed to a jam effect conveyor, in which the exercise or exertion of the driving force is controlled pneumatically on the object. The invention forms an improvement of the roller conveyor with a jam effect of the type of conveyor described, for example, in US Pat. No. 3,420,355.

The improvement according to the present invention resides in the fact that the conveyor can be made with compact, lightweight, simple and relatively cheap pneumatic devices for controlling the movement of objects along the conveyor

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track is provided. Because of the pneumatic way of working In this conveyor system there is a time delay between the perception of an object and the response of the control device for moving objects. Another improvement is that an override is provided is that allows an instantaneous actuation of all operating zones regardless of the position of the button, so a to effect rapid and complete evacuation of the entire conveyor.

These and other objectives and purposes and benefits of the present Invention will become apparent to those skilled in the conveyor art immediately from the following description of an embodiment of the invention with reference to the accompanying drawings. In the drawings show:

Fig. 1 is a plan view of a roller conveyor according to the invention;

Figure 2 is a side view of the conveyor shown in Figure 1;

3 shows a sectional view of the conveyor according to FIGS. 1 and 2 along the section line IH-III of FIG. 2;

FIG. 4 shows a sectional view along the section line IV-IV of FIG. 3;

FIG. 5 is a sectional view taken along section line V-V of FIG Fig. 3;

FIG. 6 is a sectional view of a representation similar to that of FIG. 3 to illustrate the Conveyor in a position in which the objects

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no internal movement is issued;

7 is an enlarged side view similar to that of Fig. 2 with the omission of some components for Representation of the button mechanism according to the invention;

Fig. 8 is a view similar to that in Pig. 7 for illustration of the BreiBsaiechanisiiLus according to the invention;

γ if :. 9 is a pneumatic control scheme to illustrate the basic pneumatic pressure system according to the invention;

Fir. 10 shows a pneumatic control scheme for the transport crossing Quick release device according to the invention;

Pig. 11 is a schematic representation of a conveyor Jam effect to show the arrangement of the actuating devices along the length of the conveyor.

In the embodiment of the invention, vertically adjustable support or pressure rollers for the drive member are in groups arranged, each group operated or actuated by means of a pneumatically powered actuator will. The arrangement is pivoted down into a position in which the drive member or drive element is outside of the drive position in which it moves objects forward. ¥ enn the actuating device pressure medium is fed, the one that takes place downwards Sehvfi-nkbeweirung · causing pressure overcome, and the actuating device provides the support or Pressure rollers, up to a position in which the drive member is in a drive position is.

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A sensing device or a device that senses objects in another way, switches a valve that between the actuator and the source of pressure medium is arranged. In a drive position in which the objects forward movement is given, the actuating device is controlled by means of the pressure medium source via the Valve switched on or actuated. After the perception of an object, the valve closes in relation to the pressure source and opens with respect to the actuating device, whereby the pressure located therein is vented and the support or pressure rollers as well as the drive member allows x \ rird, one outside the position located in the drive position.

A pivoting braking device connected to the actuating device and on selected transport rollers is applicable is also provided to safely decelerate and stop the movement of the objects on the conveyor.

With reference to Figures 1 and 2 of the drawings, denotes Reference numeral 10 a conveyor track of conventional design with a pair of side rails 12 and 13 as well as for receiving of objects certain transport rollers 14, which are arranged at a distance from each other, so that between them a Area formed for the transport and conveyance of objects An endless drive element or a drive belt 16 is arranged below the transport rollers 14. Is it should be noted that the drive element runs over steering pulleys at each end of the strand and essentially one has conventional training and equipment for its propulsion. This equipment is not shown because it in their execution corresponds to conventional construction and because many types of devices of this type for that purpose

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are usable.

The belt 16 is of support or pressure rollers 18 for the one. handle with the transport rollers. 14 worn. Each of these pressure rollers is rotatably mounted on a shaft 20. The rollers are supported at one end by the shaft 20 in a slot 22 (Fig. 3), which is formed in the side rail 12 is. The opposite ends of the pressure rollers were supported by the shaft on an inner support rail 24 (Mg, 3). The inner support rail 24 is elongated with a plurality of equidistantly spaced from one another provided openings 26 which receive the shaft 20 of the pressure rollers. The openings 26 extend vertically in the inner support rail, creating a vertical Movement of the shaft in the respective opening is allowed. The inner support rail 24, which is shown on a larger scale in Pig. 3 is shown, is formed in the v / it ent borrowed as a channel 28, which is partially closed at the top on the side opposite the openings 26. The channel 28 runs parallel to and is so attached to the inside of the side rail 12 that the openings 26 in alignment with the slots 22 in the opposite side rail 13 are.

Jiin inflatable, elongated tubular it is limb 30 arranged within the channel 28 and, in its inflated position, holds the pressure rollers 18 in an upper position or drive position for the objects.V / ie is shown, this is achieved by means of a flat support plate 32 which is arranged within the closed channel 28. If that Tube is inflated, the support plate 32 is pushed up against the shafts 20, making them within limits the slots 26 are moved upward. The shafts 20 on one side and the inwardly facing lip 34 on the opposite

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overlying side of the closed channel limit the movement the plate 32 and so avoid da.3 it out of the channel can be moved out when the tube is inflated.

The tube-like member 30 shown in Fig. 4 can be made of a fabric-reinforced neoprene rubber. That The member has been closed at one of its ends (FIG. 4) in a suitable manner, for example by vulcanization. The opposite end 38 is similarly closed and carries an inlet pipe or connector 40 which by means of a suitable conduit 42 (Pig. 3) via a Control valve 44 for the actuator is connected to a source of pressure medium.

A plurality of sensing or sensing devices 46 for the perception of objects disposed along the length of the conveyor 10 at predetermined intervals. These form the control devices for each congestion zone. As can be seen from Figures 2, 3 and 7, each sensing device 46 includes a pair of spaced apart bracket members 48 and 50 which are mounted on pivot pins 54 which in turn are attached to side rails 12 and 13 of the conveyor. At their upper ends, the brackets 48 and 50 are provided with hexagonal holes 52 (FIGS. 2 and 7) for engagement with the shaft 55 of a feeler roller 49. In their tactile position, the rollers 49 are raised slightly above the height of the transport rollers 14 of the conveying surface. The brackets extend downward from the rollers. In the case of the bracket 50 on side 12 of the conveyor where the inner support rail 24 is located, the bracket is bent inward to make room for the support rail and actuator. The brackets are connected to one another by means of a tube 56 which is attached to the lower ends of the brackets 48 at each of its ends

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and 50 is attached. The brackets 48 and 50, the tube 56 and the feeler roller 49 on its shaft 55 can be moved together and form a coherent keyboard device'46. Of the Bracket 50 is provided with an outwardly bent flange 58 which is designed to be an adjusting screw 60 receives in a threaded connection. The length of the screw 60 is adjustable for engagement with the actuating rod or the piston 66 of the actuating control valve 44, as will be explained in detail later will.

A resilient tension spring 62 is attached at one end 64 to the side rail 12 of the conveyor, and the other End is attached to bracket 48. As a result of the spring force, the spring 62 brings the button assembly 46 into an upper one or tactile position. The upper limit of the movement of the feeler roller is formed by the adjusting screw 60, which is set against the rod 66 of the valve 44 is moved.

The actuation control valve 44 controls the flow of the pressure medium to the pneumatic actuator 30 and also closes in response to one of the buttons outgoing signal or a corresponding sliding movement of the button from the input opposite the pressure medium source and vent the pressure in the actuator to atmosphere. Is in a drive position for the objects the Y-valve open to the pressure medium source and closed relative to the atmosphere, so that the pressure source acts directly on the pneumatic actuator 30 to be let.

From Fig. 5 it can be seen that the valve assembly 44 has a main body 70 with mounting holes 72 for attachment to a

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downwardly extending flange 25 of the inner support wall 24 by means of conventional fastening devices 27 includes (see. Pig. 3, 6 and 7).

The main body 70 of the valve is provided with a; Pair of each other related. Through holes 80 and 90 are provided. The first opening or the first passage 80 extends over the length of the body 70 and is widened on the outside and undercut at one end by one inner. Form valve seat 82. Her inlet to the valve seat 82 has a diameter slightly larger than that of valve seat 82, ul.c, with a thread to accommodate a jinlass connector 74, designed for connection to the pressure medium source is. An O-ring 84, a bearing ball or valve ball 86 and a coil spring 88 are inside the enlarged part the opening 80 arranged. The O-ring 84 is inserted into the undercut! Tut and forms an elastic seat f for the valve ball 86 when this is pressed forward is (to the left with regard to Pig. 5) by means of the compression spring 88. Ui e shown in this figure is the valve closed with respect to the pressure medium source, from which pressure medium can enter via the connection piece 74.

A first outlet 90 in the valve extends across opening 80 and provides an opening through a side wall of the PZörpers 70. The first outlet 90 is on an enlarged one End with an internal thread for receiving a connection piece 76, which can be connected to the pneumatic actuation device 30 by means of a pipe 42 (FIGS. 3 and 6). A control piston 66 is slidably disposed in the opening 80 opposite the inlet end. The Eolben is enlarged with one Head part 94 and a longitudinally extending

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Shank part 99 provided with a reduced diameter, vJenn der Piston is arranged in the opening SO, the shaft part 99 extends over the length of the opening 80 around the valve ball 86 as described in detail below. The shaft is spaced a pair apart Parts 92 and 93 of larger diameter are provided which are placed under the head and in the middle of the length of the shaft About the outer diameter of these enlarged parts is slightly smaller than that of the passage-s 80, through which the parts extend. A screw 39 (in dash-dotted Lines shown) is in the. Body 70 screwed and extends into the opening 80 between the Parts 92 and 93 of larger diameter. This prevents the piston from pushing out of the opening 80 due to the pressing force can be. The piston head 94 is provided for engagement with the adjusting screw 60 on the feeler bracket 50 (FIG. 2). An O-ring 96 surrounds the enlarged portion 92 of the piston body adjacent to the head and forms when the piston follows right is moved, a print density. Sealing between the head of the piston and the housing 70. The space between the forms the outer diameter of the parts 92 and 93 formed in one piece on the shaft and the diameter of the opening 80 a second outlet port 98 for the print medium.

^T , 7ie in Pig. 5, the valve is in a position which would result in the presence of an object on the Taator, that is, the yoke, as in Pig. Is represented "2 and 7, is moved away from the valve and the pressure of the pressurized medium from the actuator through the second outlet port 93 is vented. Since, s pressure Tnediun from the actuator 30 flows back over ar α Anschlußstücjr 76, the opening 90 and through the opening CO along the line of the basket parts 02 and 93 from

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larger diameter, where the pressure medium is vented to the atmosphere with the part 92 with an enlarged diameter pii of the second outlet opening 93. In this position, the flow of the pressure medium from the pressure medium source is effectively blocked by the valve ball 86, which is pressed against the valve seat by means of the compression spring 86 and also by the pressure force itself.

When the conveyor is in a drive position for the articles, the push button 46 is pressurized in its upper position and the pressure switch is given access to the actuator TO via valve AA in the following manner. The tension spring 64 pushes the feeler roller 4-9 with the feeler device 46 upwards, and the adjusting screw 66 on the bracket 50 presses against the head 94 of the valve, whereby the Zolber.anordr-ung 66 out of the position as shown in is shown moved to the right. When the piston is moved to the right, the end of the ochpftes 99 of the piston 66 moves through the area of the valve seat 82 and displaces the valve ball 86, in which the spring S3 is compressed increasingly. At the same time, the O-ring 96, which is located below the head 94 and the piston body 92, is pressed together towards the head 94 and the valve body 70, whereby the second outlet opening 93 is closed. The pressure medium flowing from the pressure medium source can now flow through the inlet connection piece 74 via the openings 80 and 90 and the connection piece 76 to the pneumatic actuating device 30, v / o through it to inflate it. is initiated and to adjust the pressure rollers in a drive position for the objects.

! • liii sponsors with a multitude of uuabhanri "Vorir..Lirrder working ..- Zoz.en, who nit AL: beaoichnot sine. * Int

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shown schematically in FIG. ¥ ie for the one on the present As is readily understood by those skilled in the art, each zone is controlled by a tactile device which becomes effective to control the drive devices for each zone. The tactile rollers for a zone next to it are normal journeys the discharge end of the next adjacent zone downstream from the conveyor - in the direction of movement of the articles. 3in object that is attached to a button in a first Zone stops, puts the upstream or previous actuator in a non-powered position, and so on v / pus län. ^. s dos conveyor. TJm a suitable centering to achieve the drive belt 16 over the length of the conveyor, it has been desirable to give the arrangement to alternate each operating mechanism 30 along the length of the conveyor. The, operating mechanism for each adjacent zone is intended to be located on opposite sides of the conveyor. Zones A, C and E can besides the side rail 12, while the zones B and D can be arranged next to the side rail 13. In this way, when the belt is in an idle position, as shown in Fig. 6, will incline the belt 16 in the opposite direction in the next zone, thereby creating a tendency for the belt is prevented from shifting unilaterally to one side of the conveyor.

The objects often set their movement for reasons of inertia along the conveyor, even after the drive devices have already been turned into a non-powered one Position have been brought. To this apparition too To prevent this, it is desirable to have a braking device at each zone.

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The braking device shown in FIGS. 2 to 3 is provided as a whole with the reference symbol 100. The brake consists essentially of an elongated member 102 which is pivotally attached to the inner support rail 2t by conventional fasteners to form a: ·} fulcrum 10Ί. One end of the arm is bent outwards in order to form a surface 106 which carries a friction pad 108 since, ^{in one position, s v} engages a transport roller 1 ··· arranged above it. Hine tension spring 110 is connected to the opposite end 112 of the arm and it, the otützgeotell of the conveyor 10, is connected. \ Ieim the pressure in the actuating device: irdallows, verd <?] ·. the pressure rollers are lowered to a non-driven position. The tension spring 110 causes the arm to move the. To pivot pivot point 104, v / o by the friction pads in engagement with the. Transport rollers are brought. The brake responds to a lowering of the support or pressure rollers in order to delay and stop the movement of the objects on the conveyor. The movement of the brake is resp. With the movement of the actuating device 30 depending on an input signal. ^r . a switching movement on the part of the button 46 is controlled. The arm 102 of the brake 100 is supported on a shaft 20 of a pressure roller 13 a · .: a point in which there is a sound between an ßcliwenkpunkt 10-1 and the Jew 112, the ai. the tension spring 110 is connected. when the pressure roller 13 is moved on its shaft 20 within the slot 22 as a function of the movement of the actuating device, a corresponding and opposite movement takes place on the brake arm. ^: IENN the pressure rollers in a non-driving position adjusting v / ground, the end 112 moves the arm by means of the tension spring 110 ^r with the V. elle downward, thereby causing the friction pad 108 to detect the DCR-Uber arranged transport roller, for their

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to stop away. "Usually there are a variety of Br ems articulated in every work: 'ie of the sponsor' provided. Im Ideally, one brake is actuated by each pressure roller ", to any other transport roller on the conveyor steer.

During normal operation of the conveyor, the move Objects on this along the conveyor track formed by a conveyor until the movement of the objects begins a purkt through a controlled gate or frame (not shown) or stopped by some other device that prevents the movement of the objects At this point the objects accumulate until the button is actuated, whereby the adjoining 3eiide stowage zone in a Inoperative position for the objects is set. The objects accumulate in that zone and operate their connected buttons etc. along the conveyor. ¥ e: .in objects move from one zone to another along the conveyor without jamming, they arrive naturally via various buttons and trigger them. However, this has no effect on the actuating device or the pressure valve, since the valve is given its own time delay. The speed with which Pressure being vented to atmosphere is controlled by the difference in diameter between the passage 80 and the larger diameter parts 92 and 93. d ^ m valve stem (Fig. 5) .- In the time when if the pressure from the actuator begins to vent through the second outlet, the item has the sensing device is exceeded and the pressure is restored to the actuating device from the pressure medium source fed.

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"/ enii the conveyors were operating at high speed the time lag inherent in valve 44 can be extremely large, and it may be necessary as an auxiliary device a linear vent valve to be provided. Pig. 9 shows schematically a pneumatic Drucksystexn genä.3 the present invention where the actuator 30 is about a quick release valve 120 is connected to valve 44 is. The valve 44 is connected to a pressure medium source 122 via the line 124. The valve shown schematically is identical to that which has already been explained previously in connection with FIG. 5 with the reference numerals 94, 90 and 96, which represent the inlet, the first outlet and the second outlet.

The first outlet 90 from the valve is connected along the line via a vent valve 120 and via line 128 to the actuator 30. The tendon! Vent valve 120 is a three-way valve of conventional Ivoiistrulrtr.oii with a _.r: vent opening 130. The valve is normally in a closed .Stelluni-; depressed with respect to the input via line 126 from valve 44 while vent 130 is normally open, the pressure in the actuator may be vented to atmosphere via line 12S and vent 130. When the valve 4 4 is open, the passage of the pressure medium through the line 126 overcomes the force acting on the valve 120, whereby the pressure medium can pass through the line 128 to the actuator. At the same time, the outlet opening is 130 of valve 120 is closed. When an object is closed on the conveyor, valve closes in c'er. Previously described 'Jn-ise, whereby the Ituickrdtt ^ lrriuuhr closed no. ¹ ?. : Ke Aunl ^ - ^ i-90'nung argue about -Izn foreign ^authenti; 98 he cntliift · that Atr.:osph"rr ~ we t el '- ^ 3 Jntlv ": tv / :. gsvetrtil.?..

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120 αcIiIie.31; quickly, ιχτ.ο- ö.ex pressure in the actuating device 30 is vented via the line 128 and the outlet opening 130 aii the atmosphere.

'Js often arises the need to provide an apparatus fvlr rapid murmur provide the conveying surface. This can be easily accomplished by simultaneously supplying pressure means to each of the pneumatic actuators along the conveyor, thereby causing the pressure rollers in each of the zones to move into a drive position for the objects. This system is in scheraa.tiscb.er form in Pig. 10 shown. In contrast to the illustration of FIG. 8, the new rapid evacuation system or transport override system additionally requires a manually controlled valve 131 which is connected to the source and a normally closed jibs -;) örrve: .vtil 13 ?, which is in "Parallel connection is connected to each of the valves 44 actuated by the button at its outlet end. The manually controlled valve 131 is connected at its inlet end via line 134 to the pressure medium source. The outlet of the valve is connected via line 156 the shut-off valve 132. A shut-off valve is provided for each actuating device and is connected to it on the first outlet side 90 of the valve 44 If it is desired to clear the conveyor, the valve 131 is opened, ur ^ d the pressure medium pressure k from the pressure medium source is applied directly to the actuating device via the shut-off valve, without doing so. the position of the valve 44 plays a role. In this way, all actuating devices that are activated by the shut-off

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Valves connected to the line 136 are moved into their raised position, whereby the drive device in all zones is brought into a drive position for the G-egensttln.de at the same time. A slight reverse flow of pressure medium occurs av .. ^r from the line 136 to the valve 44 via the line 126 to the second outlet 98, but this has no effect, since the speed with which the pressure is vented to the atmosphere, is much smaller than the supply from line 136. l / eim the items from the :. When the gate has been cleared, the valve 1? 1 can be closed and the actuating devices now begin in the one previously described; r.ornrl? n '. eicG to work.

Jicse nögliohkeit a quick start of the conveyor significantly contributes to its versatility, as simple -Adjust valve 1 ~ 1 in an open position of all actuation devices in each zone operated and the conveyor is operated like a conventionally powered roller conveyor is working.

From the preceding description and from the drawings goes for the. on the present :: field experienced raciimaiir .. easily out because. "· the present; 3r £ in £ .u: '. g a oi :: isrorde / every day versatile l'örd ^ rer creates, being relatively simple and cheap components are used and some front is easily inconceivable for use as conventional driven! "conveyor.

', -. ■■' while various exemplary embodiments of the invention are shown and have been described, it should be noted There are other designs and modifications to the present

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Invention making use of the teaching given | 'in the light of these remarks are loioht possible. All Execution s former., And amendments from the basic Making use of ideas of the invention are intended to fall under the invention disclosed here.

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Claims (3)

223281a claims 1. Roller conveyor has a jam effect in the version with one Large number of transport rollers that form a transport path for picking up and transporting objects, a / ntricbselenent, Pressing devices, you .the drive seleraoirt bring into a drive connection with the transport rollers, a variety of actuators to engage of the .drive member and the transport roller !!, whereby the Actuators are used in series along the conveyor, a plurality of buttons for plaguing the Presence of objects on the conveyor, being respectively one of the buttons for actuation is connected to each of the actuating devices and each actuating device a pneumatically inflatable member on v / eist, characterized by a first compressed air source (122 - 12-4), which is connected to each inflatable member (30) and to a control valve (44) connected between the source and said Member (30) is arranged, wherein each of the control valves (4 4) dt is connected to one of said buttons (46) and the actuation of said button (46) brings the valve (44) connected to it into a closed position, a second A source of compressed air (122-124) connected to each of the inflatable members (30) between said control valve (44) and said inflatable member (30), and a main valve (131) in the second source, which in its open Position pressurized air leads to all said inflatable members (30) regardless of whether any of the control valves (44) are open. 2. Roller conveyor according to claim 1, characterized in that g e 1: e η η draws, that said control valve has an inlet (74) for the first source, one with said first source Actuating device (30) connected first output - 19 209886/0219 BAD ORiGiNAL la; B (90) and a second outlet (93) which is operable to eat _? for venting the on the actuating device (30) acting pressure when said valve (44) with respect to said first source (122) in a closed Location is moving. 3. Roller conveyor according to claim 1 or 2, characterized in that a vent valve (120) is arranged between said valve (44) and said actuating valve (30), which is normally in a closed, non-ventilating position by pressure is printed by the said source (122) and can be actuated when the valve (44) closes in order to rapidly cv. vent. > \ . lörderer according to claim 1 to 3, characterized geke η η - ζ ο ICHR: et, da2 dis actuators (30) along the conveyor (10) alternately on opposite sides of the conveyor (10) with respect to an adjacent · Betätigun ^ svc! : rrichtuii ^; (30) are arranged in order to prevent a lateral displacement of said drive element (16). 209886/0219 BAD OFHOlNAL 2fr Lee r side