DE7033841U - TENSIONING DEVICE FOR CONVEYORS WITH TWO ENDLESS CHAINS. - Google Patents

Description

DIPL.-ING. HARRO GRALFS PATENT ADVOCATE

33 BRAUNSCHWEIG

AM It (JR (APP-VkK η TFLlI (JN (05il) 2 4 ^r > 9Q

September 10, 1970 G / mc - Z 502

ZEVA electricity company Smits & Laubmeyer X. G.

Bahnhofstrasse 73

Clamping device for conveyors with two endless chains

The invention relates to a tensioning device for conveyors with two endless chains, the sun. the ends of the conveyor respectively are deflected via chain wheels, the axis carrying the chain wheels being transversely displaceable at one end of the conveyor is stored and are supported by compression springs against adjustable abutments.

Especially with conveyors with chains with a relatively small pitch, it is important to maintain a constant optimal tension of the conveyor, because if the tension is too low, the chains easily skip on the sprockets and thus lead to operational disruptions. Especially with conveyors with which goods are guided through heat treatment zones this can lead to considerable damage. Here are an example Demanders in shrinkage towers called In, these are devices, in which shrinkable films are shrunk onto goods to be packaged by relatively brief exposure to heat.

b3.8J.36 44 <* »7. ° 1.

ANK: DEUTSCHE SANK AG .. BHH <VS »#tl« ->*> ΝΓ <ί · Ν /, oil / o / rfee · POSTSCHECK HANNOVER S6 1661

The object of the invention is to create a clamping device of the type mentioned, with which the compliance with the predetermined tension of the chains can be monitored.

This object is achieved according to the invention in that on the axle or the axle bearing and the abutment, respectively Projections are arranged to carry the display means, depending on the distance between the abutment and the axis are effective.

Appropriately, an angular bracket is attached to the axle and the abutment, the free legs of which against each other are directed and overlap lying parallel to one another and that on the overlapping sections the display means are attached as visual markings. Here, solar energy fields can be placed next to one another on one leg be applied and the other leg with one with the Tolerance fields cooperating marking be provided. The marking can consist of an arrow. It is also possible to arrange a hole in one leg through which the tolerance fields arranged on the other leg are visible. The tolerance fields or the markings can also be moved on separate ones on the leg and lockable elements can be arranged in order to be able to easily set the starting position of the zero position.

An additional optical or acoustic display can can be achieved in that electrical switching means on one projection and actuating means on the other projection for the electrical switching means are arranged. It can expediently the outer leg of the overlapping Leg beyond the mounting leg

extended and provided with a bend at the end! be, either on the mounting leg or on A switch is attached to this bend, which cooperates with the eeeremiberli sweeping element; and at ErreJ-chm the minimum preload is actuated.

It can also be useful to provide an additional fixed switch that goes through in the tensioning direction a projection of the axle or the axle bearing in the outer end position of the axle can be actuated.

The invention is illustrated in one embodiment and described below in detail with reference to the drawing, which shows a longitudinal section through an inventive Jig reproduces.

The drawing shows a clamping and bearing sleeve 2 in which a spring abutment 4 is axially displaceable and non-rotatable is arranged. The spring abutment 4 is provided with a threaded hole into which the thread 6 of a machine screw 8 is screwed in, which is rotatably passed through a bore 10 in an end wall 12 of the sleeve 2 and is supported on the outside of the end wall with a key head 14. The screw 8 is further through a hole an axis 18 passed through, on the rotatable in the usual way the right shown deflection sprockets a Chain conveyor are stored.

A compression spring 20 is arranged between the abutment 4 and the axle 18, through which the chains via the axle 18 are kept under tension, which are placed on the deflection sprockets. By turning the screw 8 and with it

Versshieben of the abutment 4, the tension of the spring 20 ujt ¹ so that switches the chain tension and adjustable.

The sleeve 2 has a longitudinal slot on its underside 22 provided. An angular bracket 24 is attached to the abutment 4 and an angular bracket to the axis 18 Tab 26. The two free legs 28 and 30 of the angled tabs 24 and 26 are parallel to one another and spread over. The other two legs 32 and 34, with which the angle brackets are attached to the abutment 4 or the axis 18, are passed through the slot 22 and at the same time can prevent the abutment 4 from rotating in the case of the abutment 4.

On the side edge of the leg 30, a tolerance field 36 is applied with a middle tolerance field 38 and one each lateral tolerance zone 40 or 42. An arrow 44 is arranged on the side surface of the leg 28. The tolerance field 38, in cooperation with the arrow 44, indicates the correct preload, while the tolerance zone 40 closes a range low bias and the tolerance zone 42 indicates a BeAch too high bias.

To monitor the chain tension, it is therefore only necessary to observe the position of the arrow 44 relative to the tolerance fields to become. If the chain pretension is too low, the spring is re-tensioned by turning screw 8 until the arrow 44 is again above the tolerance zone 38.

In another embodiment, the tolerance fields could be applied to the flat side of the leg 38, which

-S-deic leg 30 is facing ·: ~ ιά J.η the leg 30 a

Ϊ Bnhwitig ατισβ'ηρηΛι, ΐ se η _ Λτιτν \ η Λτβ Harm nas

respective tolerance field and thus the spring preload observable is.

In order to be able to compensate for spring tolerances, it can be useful, for example, to mark the tolerance field on a to apply separate on the leg in question displaceable part, which is then relative with the correct spring preload to the arrow Adjusted and then locked.

The adjustment area of the jig is on the area limited, which lies between the axis 18 and the inside of the end wall 12. When the end position is reached, the chain, which has been steered during operation, usually shortened by removing one or two chain links. To that To indicate that the end position has been reached, a screwed-on angle bracket 46 can be used on the sleeve 2, for example Limit switch 48 be attached to the leg 34 the angle bracket 36 cooperates. The switch 48 can either through elongated holes in its fastening leg or through an adjusting screw 50 in leg 34- adjusted will. For example, a warning light or an acoustic signal generator can be actuated via the switch 48.

Experience has shown that constant visual observation is frequent is omitted, further electrical switching means can be provided, which are actuated as soon as the spring preload drops below the specified value. For this purpose, in the illustrated embodiment, the Leg 30 to over leg 32 of angled bracket 24

Mnaus te extended and stranded at its end with a bend 52- ^Qr> the inside of which is a switch 54, which works with the leg 32 of the angle bracket J4. Possibly also here for adjustment in can. Leg 32 an actuating screw 56 can be provided. The adjustment of the switch 54 can be carried out in such a way that an optical or acoustic signal is given via this switch when the pointer 44 lies above the tolerance zone 40. With the help of the markings on the legs 28 and, the karect pretension is set again.

while to achieve the same chain tension in both Chains on each pretensioner markings 44 and 36 must be affixed to both tensioners accurately To be able to set the desired preload, it will generally be sufficient only on one clamping device a limit switch 4 $ M, *. to provide a failure 54.

Claims (1)

Expectations . Clamping device for conveyors with two endless chains that
are articulated at the ends of the conveyor via chain wheels, the axle carrying the chain wheels being mounted transversely at one end of the conveyor and supported by compression springs against adjustable abutments, characterized in that on the axle or the axle bearing and the abutment each " jumps are arranged, the
Carrying display means that depend on the distance
are effective between the abutment and the axis. . Clamping device according to claim 1, characterized in that there is an angular each on the axis and the abutment
Tab is attached, the free legs against each other
are directed and overlap lying parallel to one another, and that the display means are attached as visual markings on the overlapping sections. 3. Clamping device according to claim 2, characterized in that tolerance fields are applied next to one another on one leg
and the other leg is provided with a marking that interacts with the tolerance fields. . Clamping device according to claim 3 »characterized in that there is a marking which interacts with the tolerance fields
Arrow is provided. , Clamping device according to claim 2, characterized in that a bolting is arranged in one leg through which the tolerance fields arranged on the other leg are visible. 6. Clamping device according to claim 2, characterized in that the tolerance fields and / or the markings on separate on the legs displaceable and arreti _; rbaren elements are arranged. 7. Clamping device according to claim 1, characterized in that that on a projection electrical switching means and on the other projection actuating means for the electrical Switching means are arranged. 8. Clamping device according to claim 2 and 6, characterized in that the outer leg of the overlapping leg is extended beyond the fastening leg of the inner leg and *! *; ^ iner bend is provided, on the inside of which an electrical switch is attached, which interacts with the fastening leg of the other angular bracket. 9. Clamping device according to claim 1, characterized. That In addition, a fixed switch is provided, which in the tensioning direction by a projection of the / ~, hse or the Axle bearing can be actuated in the outer end position of the axis.