JPH06345232A - Device to transfer article - Google Patents

Abstract

PURPOSE: To inhibit sliding friction between a guide track and an article which comes to an instant stop, or a transfer pallet in a device for conveying a lightweight article. CONSTITUTION: A device for conveying articles has a conveying chain 13 composed of several chain elements 15 which are connected together, and moved in a loop, sliding along a guide track. Articles or transfer pallets are loaded on base parts 17 of the chain members 15, respectively, and accordingly, if the articles or the pallets comes to instant stop, the conveying chain 13 slides underneath the articles or the pallets. A damming roller 31 is used for rolling the conveying chains 13 along the bottom side of the articles or the pallets if the articles or the pallets come to an instant stop.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a device for conveying articles.

[0002]

2. Description of the Prior Art Devices of the above type are mainly used for lightweight articles,
Especially used for transporting workpieces.

Articles are placed on a transport chain that moves along a guide track, either directly or via a transport pallet. The guide track is used to guide the transport tune over the transport section given by the guide track.

In known devices of the above type, a transport chain consisting of a number of chain members connected to one another slides along a stationary (stationary) transport track. This is based on the fact that such devices are used only for carrying relatively lightweight articles.

Despite this, the transport of lightweight articles presents drawbacks due to the sliding of the transport chain along the guide track. These disadvantages include, in particular, high operating noise, relatively high driving force and significant wear.

Known devices of the above type are also used when a damming section is provided. In this case, some of the articles are stopped on the transportation track while continuing to drive the transportation chain. In this case, the transport chain slides along the underside of the article to be transported. This also causes the above-mentioned drawbacks.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to convey articles in such a way as to reduce wear and to meet the requirements for protection of the articles in particular for noise-free and easy transport. To improve the device for doing so.

[0008]

According to the present invention, the above-mentioned problems have been solved by the constitution described in the characterizing part of claim 1.

[0009]

EFFECTS OF THE INVENTION The conveyor chain rolls on the conveyor track by the rolling elements assigned to the chain member. Therefore, the sliding friction between the carrier chain and the carrier track, which generally occurs in known devices of the type mentioned above, is avoided. This results in very low operating noise and satisfactory avoidance of wear.

Further, the rolling element is arranged in the chain member such that the rolling element projects only from the lower surface of the chain member. This prevents damage and contamination of the rolling elements.

In an advantageous embodiment of the invention, the rolling elements are each arranged in the area of a pivot connection between two adjacent chain members.

As a result, on the one hand the carrier chain is guided exactly by the rolling elements along the course of the guide track, and on the other hand the carrier chain is ensured by the smallest possible number of rolling elements. Moreover, it becomes possible to guide rolling completely.

In an advantageous configuration of the device, the chain member comprises:
Support rollers are assigned to support the articles to be conveyed. In this way, if the article to be transported is stopped for a short time, the transport chain can continue to roll (momentarily) along the underside of the stopped article in the damming section.

Further, since the damming roller can be driven, the article to be transported can be moved relative to the transport chain. Depending on the driving direction of the damming roller, the transportation speed of the article with respect to the transportation path can be lower or higher than the speed of the transportation chain.

A support roller is preferably associated with each chain member. The load of the article supported by the at least two support rollers is distributed over a number of chain members. Further, a large number of support rollers can be assigned to each chain member.

According to another configuration of the device, the respective support rollers are supported in the respective chain members so as to be freely rotatable about the rotation axis extending in the direction transverse to the transport direction. In this case, at least the upper section of the respective support roller projects upwards with respect to the plane of the respective chain member in order to prevent contact between the upper plane of the chain member and the article to be conveyed.

The free rotation of the support rollers makes it possible to simply move the transport chain, which is continuously driven when the article is stopped, in this case
The support roller rolls under the article (which stops momentarily).

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The illustrated apparatus is a so-called link chain conveyor for carrying relatively lightweight articles. For example, such a conveyor may be used to convey a workpiece, such as the V-belt wheel 10 shown in FIG. The work piece is conveyed by an apparatus along an assembly line or the like directly or via a conveyance pallet 11 (FIG. 5) or 12 (FIG. 9).

The device according to FIGS. 1 to 8 comprises a circulatingly driven, preferably endless transport chain 13 which moves in a guide track. The guide track is fixedly attached, that is, fixed to the assembly line. Due to the course of the guide track made up of straight and arched sections, the transport section is constructed in conformity with the (spatial) conditions. The course of the transport section is not limited to a plane, but rather the transport section can extend in three dimensions (three-dimensionally).

The transport chain 13 comprises a number of chain members 1
5 (FIGS. 1 to 4). Chain members 15 of identical construction are connected to one another. Such coupling is accomplished by pivoting at link points 16 located between adjacent chain members 15.

Each chain member 15 has a base part 17, which is preferably integrally formed from plastic, which base part has an upper surface 18 and a lower surface 19 which are planar with respect to the transport plane. There is. The upper surface 18 and the lower surface 19 extend parallel to each other. The base portion 17 is formed in a substantially Y shape in a plan view.

The base portion has a connecting projection 21 on one side surface extending in the lateral direction with respect to the carrying direction 20 and a connecting projection on a side surface opposite thereto (also on a side surface extending laterally with respect to the carrying direction 20). It has a connecting recess 22 formed in conformity with the shape 21. When the chain members 15 are connected to each other, the connecting protrusions 21 of the chain members 15 engage in the connecting recesses 22 of the adjacent chain members 15 (first
Figure).

The coupling of adjacent chain members 15 is carried out at a link point 16 by means of a shaft 23 extending transversely to the transport direction 20. This shaft is one chain member 1
The chain member 1 adjacent to each other via the connecting projection 21 of 5
5, the connecting claws 2 arranged on the opposite sides of the connecting recess 22
4 in the lateral direction (FIG. 1).

The connecting projections 21 and the connecting recesses 22 are designed as self-interlocking spherical sections of conforming shape, by means of which the transport chain 13 can be guided upwards and downwards and in curves (first). 1
Figure). A blind hole 25 starting from the lower surface 19 of the base part 17 is arranged in the connecting projection 21, in which a cylindrical or possibly spherical link piece 26 is provided.

The shaft 23 extends through a laterally extending hole 27 in the link piece 26. An elongated hole 28 is provided in the area of each connecting projection 21 adjacent to the opposite ends of the hole 27 (FIG. 1). As a result, the shaft 23 can be rotated together with the link piece 26 in the connecting protrusion 21, and thus the transport chain 13 can be smoothly curved.

Each chain member 15 has a recess 73 in both coupling pawls 24 juxtaposed at a distance.
The recess 73 starts from the upper surface 18 of the chain member 15. The flat cover surface 74 of each recess 73 is the top surface 1
The lower side of 8 extends at a parallel interval.

A thin plate-shaped protrusion 75 is provided on the end of the chain member 15 on the side facing the connecting protrusion 21, that is, on the side opposite to the recess 73. The protrusion 75 is formed in conformity with the recess 73. The length of the projections 75 is chosen so that the projections 75 of one chain member 15 extend over the partial extent of the recess 73 in the adjacent chain member 15 (FIGS. 1 and 4). As a result, there is no intermediate space between adjacent chain members 15 if the transport chain 13 is straight.

Therefore, the upper surface 1 of the adjacent chain member 15
8 seamlessly transition to each other. By appropriately forming the projections 75 and the outwardly enlarged recesses 73, the projections 75 almost completely fill the recesses 73 on the inside of the arch and thus adjoin on the inside of the arch, if the course of the transport chain is arched. Guarantees a seamless transition to the chain member 15 (Fig. 1).

According to the invention, the chain member 15 has rolling elements. In the illustrated embodiment, each chain member 15 is provided with two rolling elements. In this case, the rolling elements are designed as cylindrical rollers 29, each of which is largely a suitable cavity 3 in the base part 17.
It is located within 0.

The cavity 30 is arranged in the coupling pawl 24 on the side of the coupling recess 22, which is laterally opposite. The cavity 30 is open toward the lower surface 19 of the base portion 17. In the other part, the cavity 30 is closed, so that the base part 17 includes most of the rollers 29, especially the chain member 15.
Alternatively, it surrounds or covers the sides and top surface 18 of the base portion 17.

Each roller 2 protruding from the lower surface 19 of each chain member 15 or base portion 17
Only a small lower subrange of 9 is not surrounded by the section of the base part 17 adjoining the cavity 30.

To this end, the outer diameters of the rollers 29, which have the same construction, are designed so that the respective rollers 29 partially project from the lower surface 19 of the base portion 17 (FIG. 3). As a result, the chain member 15 is supported on the guide track 14 by the rollers 29. Therefore,
The transport chain 13 rolls along the guide track 14 to prevent sliding friction (FIG. 5).

The rollers 29 in the base part 17 are supported on a shaft 23 for connecting adjacent chain members 15. The longitudinal central axes of the shafts 23 extending transversely to the transport direction 20 are located on the link points 16 of the two chain members 15 which are connected to each other.

The vertical central axis of the shaft 23 is the lower surface 1 of the base portion.
9 has a distance of less than half the height of the base portion 17, which causes the roller 29 to have a lower surface 19
At, it projects from the base portion 17, but is covered by the base portion on the upper surface.

The transport chain 13 is equipped with damming rollers 31 according to the invention. In the illustrated transport chain 13, each chain member 15 has a damming roller 31 (FIGS. 1 to 3). Each damming roller 31 of each chain member 15 is arranged between two successive link points, preferably approximately centrally. For this purpose, each damming roller 31 is arranged in 32 in a suitable cutout inside the base part 17.

For this purpose, the cylindrical damming roller 31 is rotatably supported on a shaft 33 extending in the transverse direction with respect to the conveying direction 20, that is, it is slide-bearing. The longitudinal central axis of the shaft 33 extends parallel to the longitudinal central axis of the shaft 23 for supporting the roller 29. In terms of height (relative to the lower surface 19 of the respective chain member 15) the shaft 33 is offset with respect to the shaft 23.

The shaft 33 preferably extends approximately centrally between the upper surface 18 and the lower surface 19 of the base portion 17. As a result, when the damming roller 31 has an appropriate outer diameter (larger than the distance between the upper surface 18 and the lower surface 19), the opposing range of the damming roller 31 projects from the upper surface 18 and the lower surface 19 of the base portion 17. (FIGS. 3 and 5).

Since the damming roller 31 projects from the lower surface 18 of the base portion 17, the workpiece or the transportation pallet 11 (FIG. 5) transported on the apparatus is supported only on the damming roller 31 and is formed on the base portion 17. Not supported above. As a result, the workpiece or transfer pallet 1
When 1 stops momentarily, the transport chain 13 which is continuously driven is stopped by the damming roller 31 in order to prevent sliding friction between the transport chain 13 and the transport pallet 11 or the workpiece. You can move under.

The guide track 14 is formed on the lower surface 1 of the base portion 17.
Similarly, a weir roller 31 that similarly projects from
4 is configured not to be supported on. For this purpose, a central groove 34 is provided in the running surface 35 for the roller 29, which groove corresponds to the width of the damming roller 31 and has a damming roller range which projects downwards from the base part 17 in a guide track. It is configured so that it does not come into contact with (Fig. 5).

In this way, the damming roller 31 is stopped during the transportation of the workpiece or the transportation pallet 11. As a result, the workpiece or the transport pallet 11 is transported along the guide track 14 at the transport speed of the transport chain 13. When one or a plurality of workpieces or the transport pallet 11 is stopped in the damming section or the transport chain 13
In contrast to this, when continuously moving at a low speed, the damming roller 31 rolls below the workpiece or the transport pallet 11 in order to prevent sliding friction.

In the embodiment of the invention shown in FIG. 6, the damming roller 31 is driven indirectly. This is preferably done by the damming roller 31 coming into contact with the guide track 14 in a transport section or a predetermined section of the guide track 14. In this case, the damming roller 31 is driven by frictional contact with the guide track when the transport chain 13 moves along the guiding track 14, in which case the damming roller 31 rolls on the stationary guide track 14. This is done by the fact that the groove 34 in the running surface 35 is provided in the guide track 14 only over a certain transport section segment.

The apparatus shown in FIG. 6 is capable of selectively driving the damming roller 31 over a predetermined section of the conveying section. For this purpose, the guide track is provided with a running rail 36 which is movable in the region of the groove 34. The running rail is supported on a rotatable shaft 37 having an eccentric body 38.

The eccentric body 38 moves the traveling rail 36 up and down by rotating the shaft 37 about a horizontal rotation axis 39 extending in the lateral direction with respect to the transport direction 20. In the illustrated embodiment, the shaft 37 is rotated by a magnet 41 that operates a turning lever 41 fixed to the shaft 37. But also another drive, for example a gear drive,
Adjusting motors or swing cylinders can also be used.

The eccentric body 38 allows the traveling rail 36 to move to the sixth position.
When it is moved high to the position shown in the figure, the section of the damming roller 31 projecting downward from the base part 17 of the chain member 15 is fixed to the guide rail 14 in the conveying direction. To contact. In this case, the damming roller 31 is driven in a frictional connection manner based on the movement of the transport chain 13.

Since this drive is performed in the transport direction 20,
The conveyance speed of the workpiece or the conveyance pallet 11 on the damming roller 31 is twice the speed of the conveyance chain 13. That is, in the contact range of the damming roller 31 with the traveling rail 36, the workpiece or the transport pallet 11
Is continuously conveyed at a double conveyance speed.

The eccentric 38 is designed such that the eccentric lifts the running rail 36 until the roller 29 of the chain member 15 is lifted from the running surface 35 of the guide track 14. Therefore, the work or the carrier chain 13 having the carrier pallet 11 only comes into contact with the traveling rails 36 (FIG. 6), whereby the traveling rails 36 and the respective retaining rollers 36 are provided in order to obtain a sufficient driving force of the retaining roller 31. A sufficiently high frictional force can be obtained.

Due to the different types of movement of the eccentric body 38,
The traveling rail 36 is lowered so that the contact between the traveling rail 36 and each damming roller 31 is removed. The roller 29 of the chain member 15 again has the guide track 1
4, the contact of the damming roller 31 is totally removed and the damming roller is no longer driven. In this case, the workpiece is continuously moved again within the range of the traveling rail 36 at the speed of the transport chain 13.

Alternatively, the damming roller 31 can be designed and arranged in the base part 17 such that the damming roller 31 projects from the upper surface 18 of the respective base part 17 only by the upper section. In the case of this embodiment of the device, the transport chain 13 rolls along the underside of the stopped or decelerated workpiece or the transport pallet 11, but it is no longer possible to drive the damming roller 31.

Such a construction of the damming roller 31 is particularly suitable for devices in which it is not necessary to drive the workpiece or the transport pallet 11 at a speed different from that of the transport chain 13.
Suitable. In this case, the central groove 34 in the running surface 35 of the guide track 14 is omitted.

Further optionally, the chain member 15 may not include the roller 29 but only the damming roller 31. In this case, the transport chain 13 slides along the running surface 35 of the guide track 14 or the weir roller 31.
Rolls on the running surface 35. When the damming roller rolls on the traveling surface, the workpiece or the carrier pallet 11 is always transported at twice the speed of the carrier chain 13 as long as the damming roller 31 is not released from the guide track 14. .

The guide track 14 of the embodiment of the device shown in FIGS. 1 to 6 is constructed in one piece. In contrast, in another embodiment, the guide track is multi-part (FIGS. 7 and 8). The guide track preferably comprises a support molding 42 extruded from aluminum and a guide rail 43 or 44 made of plastic or the like. The guide rails 43, 44 are arranged in an upwardly open groove 46 in the support molding 42.

According to the invention, the guide rails 43, 44 are constructed differently. The guide rails have in particular different heights, which allow the guide rails to selectively partially (FIG. 7) or completely (FIG. 8) the groove 46 in the support body 42.
Figure) Meet.

The guide rails 43 and 44 are the transport chain 13
For this purpose, each has a U-shaped receiving portion 47 which is similarly formed. For this purpose, the receiving parts of the respective guide rails 43, 44 are designed approximately corresponding to the cross section of the transport chain 13. Due to the different heights of the guide rails 43, 44, the transport chain 13 is supported in the guide track 45 at different levels.

The guide rail 43 (FIG. 7) has only a U-shaped receiving part 47. Receptor 47 of the guide rail 43
A groove 34 (which is selectively configured for the embodiment of FIG. 4) for forming a cavity 30 for the damming roller 31 and a running surface 35 for the roller 2 are provided in the bottom of the roller. There is.

The guide rail 43 covers approximately the lower half of the groove 46 in the support 42. Therefore, parallelly extending (upright) wall sections 48 are formed on the upper side of the guide rail 43 for laterally limiting the groove 46. This wall section is used to receive a preferably cylindrical appendage 49 on the underside of the transport pallet shown in FIG. Wall division 4
In order to reduce friction with the rolling elements 8, rolling elements (not shown) may be provided.

The guide rail 44 (FIG. 8) has a spacer on the underside of the U-shaped receiving part 50 which substantially corresponds to the receiving part 47 of the guide rail 43. The spacer is constructed as two upstanding webs 51 extending in parallel. The height of the web 51 is the upper edge 5 of the receiving portion 50.
2 is designed to be flush with the upper surface 53 of the support molding 42.

With this configuration of the guide rail 44, the transport chain 13 guided in the receiving portion 54 of the guide rail 44.
The upper partial area of occupies the upper side of the plane (FIG. 8) formed by the upper surface 53 of the support molding 42. In this way, the device makes it possible to convey workpieces that are wider than the conveyor chain 13 or the guide track.

The guide rails 43 and 44 are detachably arranged in the support molding 42. For this purpose the guide rail 4
3 and 44 have a projection 55, which is form-fittingly engaged in a suitable recess 56 in the groove 46 of the support molding 42. Such engagement is achieved by pushing or locking the guide rails 43, 44 into the groove 46 of the support molding 42.

The illustrated support molding has grooves on the side wall and on the lower surface, in particular with two T-shaped grooves 57 each. This groove is used to fix the support molding 42 to a support mechanism or the like, or to attach any object to the support molding, for example the magnet 40 (FIG. 6).

Further, a hollow chamber is formed in the support molding 42, and the lower hollow chamber 58 of the hollow chamber is used for returning and guiding the empty lower belt of the transport chain 13. The lower belt is illustrated in FIG. 9, which is described in detail below for clarity of the drawing.

Another embodiment of the device is illustrated in FIG. This device has two parallel guide tracks. The first guide track (on the right in FIG. 9) 59 is constructed similar to the guide track 45 shown in FIG. 7, that is to say it consists of a support molding 42 and a guide rail 43.

Furthermore, the guide track 59 can be constructed similarly to the embodiment of FIG. 5 (without the guide rail 43).
In the guide track 59, the transport chain 13 (see FIGS. 1 to 4).
The transport chain corresponding to the figure) moves. The empty lower belt 60 of the transport chain 13 is guided back in the (lower) hollow chamber 58 of the support molding 42.

The second guide track (left side in FIG. 9) 61 is formed by a support molding 62 having a particularly narrow width in which the transport chain does not circulate. The upper surface 63 of the support molding 62 has a flat running surface 64. The support molding 62 has a laterally open free space 65, which is used for receiving the supply conduit 66 and the like and can be closed by a cover strip 67. The cover strips 67 are detachably connected to the open side of each free space 65.

The illustrated device has a specially constructed transport pallet 12. This transport pallet has both guide tracks 5
It comprises a relatively wide support 68 extending over 9,61. Two lower additional parts 69 are provided on the side of the support facing the guide track 59, and these additional parts project into the groove 46 of the support molding 42 from above and the transport chain 1
3, that is, supported on the damming roller 31 of the transport chain.

In this way, one side of the transport pallet 12 can be driven. A single add-on 6 for selectively guiding the transport pallet 12 in the guide track 59.
9 is also sufficient.

The cylindrical support body 68 is rotatable about a vertical axis 76. The support has a base piece 77 screwed from below to the transfer pallet and a roller 78 supported by the base piece 77. Base piece 7
7, the base piece has a vertical axis 76 below the transport pallet.
It is screwed to the transfer pallet 12 so as to be freely rotatable around the center. Similarly, the roller 78 is freely rotatable on the base piece 77 about a vertical axis 76.

The diameter of the roller 78 is such that the circumferential surface of the roller is larger than the lower cylindrical portion 79 of the base piece 77, but with play between the parallel wall sections in the groove 46 of the guide track 59 ( (Fig. 9) has been selected. In this way, the addition portion 69 of the transport pallet 12 is guided in the groove 46 by the roller 78.

The edge of the transport pallet 12 assigned to the second guide track 61 has at least one traveling roller 70. The running roller is rotatably supported in a suitable notch 72 in the support 68 via a shaft 71 extending transversely to the transport direction 20.

The end portion of the transport pallet 12 on the side opposite to the drive side is guided by the guide track 6 by the traveling roller (s) 70.
1. In this case, the traveling roller 70 drives the transport pallet 12 by the transport chain 13 to drive the traveling surface 6
Move along 4. The traveling roller 70 is rotatably supported on the transport pallet 12 about a vertical axis 80 in the illustrated embodiment. As a result, the traveling roller 70 has the function of a rolling roller.

The free space formed between the guide tracks 59 and 61 allows the carrier pallet 12 to be accessed from below. This makes it possible to access the workpieces arranged on the transport pallet from below, especially for mounting.

Alternatively, the second guide track 61 can be provided with guide rails in which the running rollers 7
0 is guided on the side. Further, the transport pallet 12 can be driven on both sides. In this case, both guide tracks are constructed in the same way, that is to say one transport chain 1 each.
It is configured like a guide track 59 with three.

Further, according to the embodiment of FIG. 8, the second guide track can be constructed so that the transport chain 13 projects upward from the support molding 42, and on this transport chain, the transport pallet (left side in FIG. 9, FIG. 9) is formed. The edges are free to touch. In this case, the running rollers are preferably omitted.

[Brief description of drawings]

FIG. 1 is a plan view of a part of a transport chain.

FIG. 2 is a side view of a part of a transport chain in a linear transport section.

FIG. 3 shows a chain member of a transport chain in FIG.
The expanded sectional view which followed the III line.

FIG. 4 I of the two chain members of the transport chain, FIG.
The expanded sectional view which followed the V-IV line.

FIG. 5 is a vertical cross-sectional view of an apparatus having a transfer pallet and a work piece placed on the transfer pallet.

6 is a cross-sectional view of FIG. 4 of the device in the weir section range.

7 is a cross-sectional view similar to FIG. 4 of another embodiment of the device.

8 is a cross-sectional view similar to FIG. 6 of another embodiment of the device.

FIG. 9 is a cross-sectional view of another embodiment of the device.

[Explanation of symbols]

 14, 45, 59 Guide track 15 Chain member 16 Link point 17 Base part 18 Upper surface 19 Lower surface 23 Shaft 31 Damper roller 36 Traveling rail

Claims (12)

[Claims] 1. A device for transporting articles, comprising a transport chain comprising a number of chain members connected to one another, which are driven and guided along a guide track, wherein the chain member (15) comprises a chain. A rolling element for rolling the member along a guide track (14, 45, 59), the rolling element projecting from the lower surface of the chain member (15) in one (first) partial area; Against
If the rolling element has a chain member (1
5) A device for conveying articles, characterized in that it is completely surrounded by 2. Device according to claim 1, characterized in that the rolling elements are arranged in the connecting area of two adjacent chain members (15). 3. Each chain member (15) has at least one rolling element, preferably two freely rotatable rolling elements, which rolling elements adjoin two chain elements (15). 3. The device as claimed in claim 1, wherein the device is arranged on a common axis (23) which preferably extends transversely to the transport direction (20) for connecting the parts. 4. A chain member (15) in which rolling elements are adjacent to each other.
4. The device of claim 3, wherein the devices are located on opposite sides of a generally central pivot connection (link point 16) therebetween. 5. A damming roller (31), which can be driven along at least part of the guide track (14, 45, 59), if necessary, for supporting the articles to be conveyed by the conveying chain (13). An apparatus as claimed in any one of the preceding claims, comprising: 6. Device according to claim 5, characterized in that the damming rollers (31) are arranged between adjacent pivot joints (link points 16) for connecting successive chain members (15). 7. The damming roller (31) has a guide track (1).
4, 45, 59) or by frictional contact with the stationary component of the guide track, in particular by means of a transport chain (13) driven by the stationary guide track (14, 45, 5).
9) when the damming roller is moved along at least one running surface or rail (3) of the guide track.
7. Device according to claim 5 or 6, which is drivable to roll in 6). 8. The damming roller (31) is arranged in a conveying direction (2).
0) so that each chain member (1
Device according to claim 6, which is mounted in 5). 9. The shaft (23) of the rolling element is preferably a chain member (1) relative to the axis of rotation of the damming roller (31).
Device according to claim 8, which is offset towards the underside of 5). 10. Device according to claim 5, wherein the damming roller (31) projects in a partial area at least from the upper surface (18) of the chain member (15), in particular from the base part (17) of the chain member. 11. Each of the damming rollers (31) has one
The upper surface (18) and the lower surface (1) of each chain member (15) or base portion (17) in one partial area
Device according to claim 5, projecting from 9). 12. The guide track (14, 45, 59) is provided with an increased running surface or a running rail (36) capable of moving up and down in a conveying section range in which the damming roller (31) is driven. The device according to claim 5, wherein