DE2426073B2 - Cam roller device for a collecting conveyor - Google Patents

Description

The invention relates to a cam roller device for a collecting conveyor for supporting a drive element in a raised and in a lowered position with a first eccentric roller which is rotatably arranged and is in contact with the drive element

Such a device is known from US-PS 32 53 697, in which a conveyor is described in which a drive element supported on eccentric rollers in tandem with a device for Arresting the rollers is arranged which the rollers in a lowered position of the drive element locked and thus opposite to the objects to be conveyed

stands ineffective

In the known from US-PS 32 53 697 conveyor is to be regarded as a disadvantage that the eccentric rollers cause constant vertical back and forth movement of the drive element, which leads to a rapid alternating Selenden driving and releasing of each drive roller or the objects to lower the drive element leads. In this way, the Objects transmit the driving force to the objects in impulses.

This pulsation is particularly critical when the drive element is in direct contact with the objects Touch is because the pulsating movement directly on the objects, such. B. to be promoted Boxes, cardboard boxes or the like. Is transferred. With regard to in some countries for environmental reasons there is a prevailing tendency towards lightweight containers or containers that cannot cope with heavy use use can result in premature destruction or breakage of the packages or objects as a result of this

so vibrating or pulsating movements occur in the drive.

From US-PS 37 82 527 roles with a flattened or eccentric part are known that when Inactivating the rollers is turned upwards, but that continues to convey an object when it is in the Rotated position in which the remaining or larger radial part of the roller is opposite the object

Furthermore, a role with an eccentric arrangement is known from US-PS 36 43 789 but there is the

Shifted position of their axis in order to shift the axis of rotation of the roller relative to the drive element. The roller always has a constant radius there between the shaft and the drive element, see above that the drive element in the arrangement described there in a stationary vertical position is stored. The roller itself does not have an eccentric outer surface. Finally, the US PS 34 20 356 a single eccentric roller with one in the

In the middle of the groove and a special drive flange at one end, while the US-PS 32 66 617 shows an article-bearing roller assembly with an eccentric part, which in his Circulation is alternately in and out of engagement with the drive element

The invention is based on the object of providing a cam follower device for a seed conveyor To improve support of a drive element of the type specified above that a Uniform, impulse-free transmission of the driving force is possible

According to the invention, this object is achieved in that a cam roller device of the type specified above has a second eccentric roller mounted coaxially to the first eccentric roller, which opposite the first eccentric roller is between a lowered position in which the parts of the smallest radius of the rollers are in phase with one another and support the drive element in its lowered position, and is rotatable in a raised position. in which the smallest radius portions of the two rollers are out of phase with each other and form a circular roller assembly of uniform radius which supports the drive member in the raised position

Developing features of the cam roller device according to the invention are set out in claims 2 to lOangegebea

With the cam roller device according to the invention, a double roller arrangement is advantageously available in which by supporting the Drive element at a constant height eliminates fluctuations in the conveying operation and during operation the noise level occurring on the conveyor is considerably reduced.

The invention is explained in more detail below with reference to the description of exemplary embodiments, two such exemplary embodiments according to the invention are shown in the drawing. It shows

F i g. 1 is a front view of the split cam roller according to the invention in the resting or collecting phase;

F i g. FIG. 2 is a side view in plane 2-2 of FIG. 1;

F i g. 3 shows a section of the split cam roller in FIG Level 3-3 of Fig. 1;

F i g. 4 is a front view of the split cam roller according to the invention in the raised or Drive position;

FIG. 5 is a side view from the plane 5-5 of FIG. 4;

F i g. 6 shows a section along the plane 6-6 in FIG. 4;

7 shows a schematic partial plan view of a Roller conveyor according to the invention;

8 is a partial side view, partly in section, along the plane VIlI-VlII of FIG. 7;

9 shows a partial section along the plane IX-IX of Fig. 8;

F i g. Figure 10 is a perspective view of another embodiment of the invention;

F i g. 11 is a partial side view, partially in section, to reproduce the invention in the conveyor according to FIG. 10; and in

F i g. 12 shows a partial section along the plane XII-XII in FIG. 11.

According to the drawings, in particular according to FIGS. 1 and 4, each split cam roller 10 includes an inner one Roller 12 and a pair of outer rollers 14 and 16 rotatably mounted on a shaft 18. The inner one Roll consists of a pair of spaced apart Single rollers 12a and 12ö, which are supported by a tubular Hub 12 are connected to each other.

The rollers are made of metal and each contain a roller bearing (not shown). As will be explained in more detail later, the rollers are eccentric and the outer rollers 14 and 16 are also relative to one another and together with the roller 12 between a first position, the so-called rest or collecting phase according to FIGS. 1 to 3, and a raised drive position rotatable, which is shown in Figures 4 to 6 In the collection phase, the flattened parts or parts are smallest radius, indicated with 44,46a and 46b held stationary in phase, or flight, so that a driving member, for example a belt or a belt 50, which is pulled over the rollers (Figs. 1 to 3) in the lowermost position is out of engagement with the object or the rollers supporting the object. In the drive phase (F 4-6) the smallest radius portions 44 of the outer rollers are rotated and held approximately 180 ° out of phase with the portions 46a, 465 of the smallest radius of roller 12 so that the belt or driving member 50 is raised a constant vertical distance is whereby the item can be taken. The rollers 12, 14 and 16 rotate together in this position as rollers with a circular cross-section

According to the F i g. 1 and 2, each outer roller 14 includes a peripheral edge or flange 20 and a web 22, which connects the flange 20 to the hub 24. The roller is also defined by a plurality of ribs 26 reinforced and braced which are integrally connected to the flange, the web and the hub. The roller 16 is identical to roller 14 so that details do not need to be shown.

The single roller 12a of the split roller 12 also has a peripheral flange or edge portion 26a (Figs. 1, 3 and 6) which is connected to a hub 28a by a web 30a. Radially extending ribs 32a reinforce and support the one-piece elements of the Single role 12a. The individual role 12b is identical to the individual role 12a and therefore does not need to be described in detail. The code letter b is used to identify corresponding elements as shown in the drawings.

The outer rollers 14 and 16 are rotatable relative to one another and to the inner roller 12. However, their relative rotation is limited to a rotation angle slightly less than 180 °. A stop pin 36 is anchored in the longitudinal direction through the inner roller 12 parallel to the shaft 18 and at a distance radially approximately in the middle between the hub 12c and the edge parts 26a and 26b . The meaning of the distance will be explained in more detail below. The length of the stop pin 36 exceeds the thickness of the roller 12, so that one end 38 passes through the web 22 of the roller 14, while the other end 40 extends through the web of the roller 16. The means allowing an extension through the corresponding web parts of the rollers 14 and 16 are represented by a circumferential slot 42 (FIGS. 2 and 5). The slot 42 extends for approximately 180 ° so that it prevents full rotational movement of the outer rollers 14 and 16 relative to one another and to the inner roller 12 over the same angle of rotation

Each roller 12, 14 and 16 is circular except that it is due to a portion fished

small radius is formed eccentrically. The rollers 14 and 16 have a part of the smallest radius, which is denoted by 44, while the corresponding parts of the individual rollers 12a 126, which have the smallest radius, are denoted by 46a and 466. The rollers 14 and 16 are identical, so that when the stop pin 36 strikes a corresponding end of the slot 42 of each roller so that a complete alignment of the rollers and their parts 44 is made of the smallest radius. The roller 12, which consists of the individual rollers 12a and 126 is essentially identical to rollers 14 and 16, except that the radius of parts 46a, 46b smallest radius is slightly larger in dimensions than the corresponding radius of parts 44 of sweeter rollers 14 and 16. The importance of this measure will be explained in more detail later.

Each split cam roller set 10, when used in a conveyor, is under the influence of a driving member 50 (Figs. 1-3) which is generally in the form of a belt which extends continuously over the flange or rim surfaces of each Roll moves, namely over the flanges 20 of the rollers 14 and 16 and the edge parts 26a, 26b of the individual rollers 12a, t2b. The belt 50 includes a protruding central portion 52 that fits loosely into the circumferential slot 54 formed by the spaced apart rollers 12a, 126 and hub 12c, as shown in FIG. 1 recognizes the weight and friction of the driving member as it is pulled over and into contact with rollers 12, 14 and 16, forcing the rollers to revolve.

With the exception of a transitional movement, each divided cam roller set 10 is either in a raised drive position or in a lowered collective or rest position. These positions are shown in FIGS. 1 to 6 reproduced. According to the F i g. 1 to 3, the cam roller set 10 is in the collecting position in which, when the driving member 50 moves over the surface from left to right to FIG. 2 (see arrow C) is pulled, the rotation of the rollers is forced clockwise. If a stop, for example stop 114, is in front of stop pin 35 in the position shown in FIG. 1 and 2, further rotation of the roller 12 is prevented and, depending on the corresponding position of the rollers 14 and 16, they stop rotating within half a revolution when the stop pin 36 reaches one end of the slots 42 In in this position, the smallest radius parts 44 and 46a, 46b are all up in phase so that the driving belt 50 being pulled over it is actually lowered. The idle rollers are stationary and remain so until the stop is removed from s; in engagement with the stop pin 36.

The other working position of the cam roller set 10 is shown in FIGS. 4 to 6 reproduced. If not drawn stop is removed from its engagement with the stop pin 36, then causes the special driving member that is moved over the smallest radius parts of the rollers, a immediate rotation of the inner split roller 12 This is because of the larger size of the parts 46a, 466 of the smallest radius relative to the parts 44 of the outer rollers, as can be seen from FIG. 1 and 2 can recognize. In the collective or rest position thus the band 50 actually detached from the parts 44 of the smallest radius, so that when the Stop the inner roller 12 immediately begins to rotate. The inner roller 12 rotates over the entire " Circumferential length of the slot 42, there as soon as they umzuau fen starts, its radius increases because the part has the smallest radius out of contact with the propel turns the link. However, when the other limit of the slot 42 is reached, the pin 36 detects the end " each slot in the rollers 14 and 16, so that these together with the roller 12 außei approximately 180 °

ίο phase revolve. In this outer-phase position, the parts 44 and 46a, 46b of the smallest radius are: out of phase with one another and unite in such a way that a roll with a circular cross-section is created (FIGS. 5 and 6). This operation highlights the driving force

is a limb that extends over the outer surfaces of the scooter 12 and 14,16 moved, with a roller supporting the band of uniform radius. The band arrives thus in a position for driving the objects along the conveyor and fulfills a driving function as will be explained in more detail later.

According to FIG. 2 include the outer rollers 14 and If a counterweight 60 which brings the smallest radius portion 44 into an upper orientation when rolling not under the influence of an external force in the Fonr of the band 50 stands. This overcomes the friction de; driving member drawn over the outer surface of each roller is controlled by the counterweight generated counterforce. However, if the stop pin is stopped in the resting or collecting phase, the driving belt is lifted from the surface of the parts 44 of the smallest radius of each outer roller then the counterweight will turn the outer rollers roughly: counterclockwise (Fig. 2) so that none Pulses are transmitted to the outer rollers This will, to a large extent, reduce the rattle Conveyor itself lowered Even during the common rotation when the belt 50 hits the roller 12 contacts (Figs. 5 and 6), the counterweights 60 hold the rollers 14 and 16 out of engagement with the belt 50 until the end Pin 36 drives them around. This is how the out-of-phase position occurs during rotation.

According to FIG. 3, the inner rollers 12c / and 12f likewise contain a counterweight 64 which is arranged so that the part 46a or 46b is the smallest Radius is rotated clockwise from the upper rest position. This ensures contact between the flanged surfaces 46a, 46b of the inner rollers 12a and 12Zj with the driving member moved over them. This is of particular importance

so during start-up, since under certain circumstances the belt is the least distant from the parts Radius of the rollers 12a and 120 can stand when the belt comes to a stop The constraint under the Counterweight 64 ensures that the inner rollers 12a and 126 always touch the driving member, so that during start-up an inevitable engagement between the actuating part of each shared Cam roller is present Even if rollers 14 and 16 are in drive contact with belt 50,

weights 64 push rollers 12 * and 126 out of phase with rollers 14 and 16 in the same manner, as has been described above with respect to roles 14 and 16 With regard to the preceding, detailed description of the novel

gen cam roller set 10 is its mode of operation within one or more conveyor devices easily recognizable. In the F i g. 7 to 9 denotes the reference numeral 100

a roller conveyor having conventional side frame members 102 and 104 between which a plurality of driven rollers 106 extend. The rollers 106 are arranged along the conveyor at a distance and in a common plane, so that a conveyor surface is created. Below the rollers 106 there is a driving member 50a which, with the aid of a suitable drive, moves in the direction of the arrow A according to FIG. 8 is moved so that it rotates the rollers 106 to move objects in the direction of the arrow B. The side frame members 102 and 104 are connected by rigid transverse struts 108 at suitable intervals.

The upper run of the driving member 50a is supported on the cam roller sets 10. The role sets are spaced evenly along the length of the conveyor, with only one dashed in F i g. 7 is indicated. If the driving link is a belt with one in the middle downwardly projecting guide strip 52a (FIG. 9), then these rollers are sufficiently wide to accommodate the essential part of the driving member and are provided with a central circumferential slot 54 provided, which is formed by the spaced inner individual rollers 12a, 12Zj, as in The preceding has already been explained.

As already explained, the stop pin 36 is within the inner rollers 12a, 12i> anchored and runs with them in the circumferential slot 54. A stop member or locking slide 112 (Figure 8) is slidably arranged below the cam roller sets 10 and contains upstanding stops 114, which are in alignment with the circumferential slot 54 and the stop pin 36 and cooperate with these parts. In the longitudinal direction from one end to the At the other end of the conveyor a plurality of such slides 112, 112a, etc. are provided.

Each locking slide 112 belongs to several cam roller sets 10, the number being determined by the size of the objects to be conveyed is intended. So three, four or more cam roller sets 10 can be detected will. In the particular embodiment shown, each slide works with four sets of cam rollers 10, each in zones I, II and HI (Fig.8) are combined. The length of the slide is determined by the length of the zone that Again, it is set so that it is necessary to change the height of the belt along the length of the object when it is over the conveyor is running is suitable.

Each locking slide 112 has an upstanding stop 114 for each cam roller set 10. These stops cooperate with the stop pins 36 so that when the locking slide is in its active or engaging position (FIG. 9), the stops are arranged to act on the locking pin 36 to allow free rotation of the associated cam roller sets 10 to prevent. If the slide is displaced in the longitudinal direction out of action (slide 112a and 112fc according to FIG. 8), the assigned stops are removed from engagement with the ω assigned stop pins and the assigned cam roller sets 10 can rotate freely.

Each gate valve 112 is attached to a pair of pivot arms 116 (Fig. 8) that extend on each Side of a feeler roller 118 extend downward. A rod 120 connects the lower ends of each Pivoting socket 116, the slide 112 being anchored to the central part of each rod 120 (FIG. 8).

The pivot arms 116 are pivotable about a shaft 122, the lower ends of the arms being attached to springs 124 which tension the feeler roller upwards and the associated locking slide 112 forwards so that the stops 114 are in a non-engaging position. As can be seen most clearly from FIG. 8 recognizes, the rollers 118, 118a and UBb are raised slightly above the plane of the conveying surface of the conveyor in the normal position. Thus, when an object D runs over them, they are pressed down, as is indicated in the case of the roller 118. This pivots the arrangement for moving the stop slide 112 backwards for engagement with the stop pins 36 of the four cam roller sets 10, which are assigned to the corresponding stop slide. The objects carried by the associated rollers 106 thus come to a halt as the belt 50a is lowered downwards out of engagement with them. It is provided that the sensing device of one zone actuates the slide of the adjacent upstream zone. Operated as shown in FIG. 8 is indicated, the roller 118 in zone I the slide 112a in zone II. It must be noted, however, that this mode of operation is known per se to the person skilled in the art.

9 clearly shows one of the stops 114 in the Cooperates with the stop pin 36 so that the cam roller set 10 is in a stationary position is kept, as in connection with the description of the F i g. 1 to 3 has been explained. In in this position, the belt 50a is out of engagement with the roller 106 so that the objects over the special group of rollers 106 are stopped and come to rest.

According to the preceding explanations, the basic mode of operation of the conveyor 100 is thus described, according to the various sections of the conveyor between a drive phase when the belt 52a is through the cam roller sets 10 is raised vertically, and are operated in a rest or collection phase in which the driving member 52a is lowered by the cam roller sets 10 so that the associated conveyor rollers 106 stop turning any further.

Figures 10 through 12 show another embodiment of the conveyor in which the cam roller sets are used. It is a conveyor 130 in which the driving member 50b is mounted substantially on the conveyor surface. The member 50Z> makes direct contact with the objects E instead of contacting driving rollers which in turn transport the objects as is related with the F i g. 7-9. Link 50b moves in the direction of arrow F in this embodiment, which is opposite to that of belt 50a in the embodiment of FIGS. 7-9. The construction of the conveyor is quite similar to that of the conveyor of FIGS Fi g. 7 to 9, with the exception that instead of the full width of the conveyor extending rollers 106, two outer rollers of reduced length are provided, namely rollers 106a and 1066, each group of rollers 106a and 106b spaced along the conveyor and is arranged in a common plane so that a conveying surface is created. The sets of rollers 106a and 1066 are arranged in the transverse direction at a distance so that a central line 131 remains in which this is continuously

driven member 50b is arranged.

According to FIG. 11 is the link 50b in cooperation with cam roller sets 10 according to the invention between a raised position in contact with and driving the object, as shown in the left part of FIG. 11 is shown when the cam roller set tOb rotates to raise the driving member 50b , and a lowered position in which it is out of contact with the objects supported on the conveyor rollers 106a and 106Z> when a stop mechanism is in front of the associated stop pins 36 of the Cam roller set iOb is used so that the parts of the smallest radius of the rollers 12a, 126, 14 and 16 point upwards and the link 506 is lowered. The operation of the set of curves is identical to that of the set of rollers 10 with the exception that the position of the slot 42 and the pin 36 is reversed, since the direction of rotation is also reversed. In this way, the cam roller set 10 is arranged for a clockwise rotation, while the cam roller set 10Z> is set up for a counterclockwise rotation.

A stop slide 132 is arranged below the roller sets 10b, which have a plurality of stops 134, the stop slide being movable in the longitudinal direction in a similar manner to the stop slide 112, 112a, 112Z) etc. which are used in connection with the embodiment according to FIGS . 7 to 9 have been described. The stop slide 132 are connected to one or more pivot arms 136 with their

ίο lower ends 138 are pivotable about the shaft 140 (Fig. 11). The swivel arm is at the top of the Feeler roller 142 and attached between the ends to slide 132 by a pin 14a.

The working principle of the in FIGS. 10 to 12 The conveyor 130 shown corresponds to that of the embodiments according to FIGS. 7 to 9, with the The essential difference is that the member 506 in the embodiment according to FIGS. 10 to 12 in The articles are frictionally engaged to move them along the transport rollers 106a and 106i> to advance.

For this purpose 3 sheets of drawings

Claims (10)

Patent claims: 1. Cam roller device for a collecting conveyor to support a drive element in a raised and a lowered position with a first eccentric roller that is rotatable is arranged and is in contact with the drive element, characterized by a second eccentric roller (14, 16) mounted coaxially to the first eccentric roller (12), which opposite the first eccentric roller (12) between a lowered position in which the parts of the smallest radius (44, 46a, 466Jthe roles are in phase with each other and support the drive element in its lowered position, and rotatable in a raised position is in which the parts of the smallest radius of the two roles are out of phase with each other and form a circular roller assembly of uniform radius, which the drive element in the supported raised position 2. Device according to claim 1, characterized by a stop (36) and a movable slide (112, 114), wherein the stop (36) is arranged on one of the rollers and the slide (112, 114) for selecting the position of the roller set ( 10) can be brought into and out of engagement with the stop (36) in the raised or lowered position 3. Apparatus according to claim 1, characterized in that the first roller (12) has an annular slot (54) and a pin (36) which extends transversely through the first roller (12) and through the slot (54) extends, one end of the pin extending beyond the first roller (12) that the second Roller has an arcuate opening (42) which extends over less than 360 ° of the arc, and that the pin (36) engages in this opening (42) and is engageable with each end of the opening in order to to lock the rollers (12,14,16) either in the raised or lowered position. 4. Apparatus according to claim 3, characterized in that the slide (112) einh relative to first roller (12) has radially movable finger (114) which is inserted into the slot (34) for engagement with the Pin (36) is movable to then the first and to stop the second roll (12,14,16). 5. Apparatus according to claim 3, characterized in that the opening (42) extends over approximately 180 ° so that the second roller (14,16) in the raised position is almost out of phase with the first roller (12). 6. The device according to claim 2, characterized by a plurality of roller assemblies (12a, 126,14,16) which are arranged in tandem one behind the other under the drive device (50) of the conveyor and which convey the objects (D, E) along the conveyor, wherein the respective slides (114) can be moved into holding engagement with a certain number of adjacent roller supports (10) and thus bring about a collection of objects at predetermined locations along the conveyor. 7. Apparatus according to claim 1, characterized in that the parts 'smallest radius' in are substantially similar and extend over less than 180 ° of the circumference. 8. Apparatus according to claim 7, characterized in that the radius of the part is smallest Radius' of the first roller (12) is greater than that of the second roller (14,16), so that the second roller (14, 16) is released from the drive element (50) in the lowered position 9. The device according to claim 1, characterized in that the second roller (14, 16) is a Counterweight (60) in the direction of the lowered position and the first roller (12) one such (64) in Has the direction of the raised position 10. Device according to claim, characterized in that that the first roller is formed as a pair of integrally formed roller segments which are arranged at a distance from one another and connected via a hub.