DE7038106U - Closure for connecting two core box parts - Google Patents

Description

Dipl.-lng. K. Umbrecht Dipl.-Ing. E. Umbrecht n? "?? ⁰ * ⁶ "'^"^{14> 10} · ¹⁹⁷⁰

Patent attorneys
66 Saarbrücken 3

NaseauerstraBe 5 - Tel. 3 44 33

Saarland steelworks Dingler, Karcher & Cie., G.m.b.H, Saarbrücken

"Closure for connecting two core box parts"

The innovation relates to a closure for connecting

two core box parts, as required in the foundry industry

It is known to screw together the parts of a core box which, after the core formed therein has solidified, must be taken apart again to expose it. However, this requires a time commitment that falls in relation to total production time of a core ever more significant as core materials are increasingly short setting times are available.

The aim of the innovation is a closure that is without interference the strength and security of the connection a faster assembly and disassembly of the core boxes permitted.

For this purpose, the innovation is provided that a Bolt which has a nose at one end and an abutment and an angled handle at the other end, the two core box parts in a bore with a larger cross-section than the cross section of the bolt including the

The nose engages, the abutment rests against a box part and the nose rests on the other core box part on a surface which rises around the bolt and is between its deepest and highest point a recess for the passage the nose has.

Such a lock can be operated in a few simple steps: the core box parts are joined together and the bolt is grasped by its handle, put through the hole and by turning the nose on the inclined surface slides up, tightened; loosening the lock is evidently just as easy.

The handle is preferably angled from the bolt on one side, since a greater torque can be exerted in this way. In the case of core boxes made of wood, a washer is used on one core box part, preferably in the form of a disk Widening of the bolt formed, attach the abutment and said rising surface on one to the other Arrange the core box part attached to the plate.

A simple and practical option for the type of arrangement of the closure on the core box consists in the fact that a wall of one core box part passes over a wall that abuts it The wall of the other core box part protrudes so that it is at the angle formed with the protruding piece of one wall Has approach and that said bore penetrates the protruding wall piece and the approach.

The bolt can also have a second one opposite the branches The nose and the other core box part mentioned can accordingly have a 7-width rising surface and a second recess. Then, however, the slope of the surfaces becomes greater, so that the same contact pressure can only be achieved if a greater force is exerted when the shutter is operated. In any case, there is the limit for the slope

- 3 but where the self-locking of the bolt is lost.

The drawings show an embodiment of the innovation and show in

Fig. 1 shows a longitudinal section through a core box lock according to

Line II in Fig. 2, in
Fip. 2 a view of the core box lock according to arrow II

in Fig. 1 and in
3 is a perspective view of an individual part.

The cut through a corner of a core box according to Fi g.1 shows the ends of two box walls 1 and 2, of which the box wall 1 meets the box wall 2 and these with a Section 3 protrudes beyond the box wall 1. On the box wall 1, the box wall 2 is at an angle with the protruding section 3 a two-part block 4 is arranged, which is aligned with the end of the box wall 1. The protruding section 3 of the box band 1 and the block 4 are provided with a through hole 5 through both parts of circular cross-section. At one end the bore 5 is an annular on the box wall 2, provided on the inside with a cutout not visible in the drawing Washer 6 attached. It is arranged eccentrically to the Pohrung 5. At the opposite end of the bore 5 is on Block 4 aie plate 7 screwed on, aligned with the hole and the recess of the washer 6 also has a bore 8 and a recess 9 extending therefrom. Like Fig. 3 can best be seen, the plate 7 is provided with an inclined surface 10 which extends from the recess 9 to the Bore 8 rises around and ends on the other side of the recess.

The bore 5 is penetrated by a bolt 11, which is on his one end a nose 12 and at its other end an abutment for this forming disc 13 and a rectangular angled Has handle 14. Compared to the cross section of the bolt 11 including its nose 12, the diameter of the Bore 5, the cross section of the bores 8 and recesses 9

the plate 7 and the washer 6 as well as their eccentricity with respect to the bore 5 are dimensioned so that they stick through of the bolt 11 with the nose 12 allow. The bolt 11 is like this long that after its insertion the nose 12 on the inclined Surface 10 get up, but its upper end also after the Tightening of the fastener can not exceed.

Claims (7)

- 5 protection claims 1. '(* I used to connect two box parts, thereby in shows that a bolt (11), which on its one ¹ ^. 3 has a nose (12) and at its other end an abutment (13) and an angled handle (14), the two core box parts (1; 2) in a bore (5) with a larger cross-section than the cross-section of the base (11) including the nose 0 2) engages, the abutment (13) rests on one core box part (2) and the lug (12) rests on the other core box part (1) on a surface (10) that rises around the bolt (11) has a recess (9) for the passage of the nose (12) between its lowest and its highest point. 2. Closure according to Claim 1, characterized in that a washer (6) is attached to the one core box part (2) for said abutment (13) is attached. 3. Closure according to claim 1 or 2, characterized., that said rising surface (10) on a plate (7) attached to the other core box part (1) is arranged. 4. Closure according to one of claims 1-3, characterized in that that the handle (14) is angled on one side from the bolt (11). 5. Closure according to one of claims 1-4, characterized in that that the abutment (13) is a disk-shaped widening of the bolt (11). 6. Closure according to one of claims 1-5, characterized in that that a wall (2) of one core box part over a wall (1) of the other core box part that abuts against it survives that this (1) in the one with the protruding Stücic ^ 3) d ^ r a wall (2) gcoierter angle an approach (4) and the said bore (5) the protruding wall piece (3) and the approach (4) penetrated. 7. Closure according to one of claims 1-6, characterized in that g 'indicates that (.? r two bolts opposite one another ^, ade Lugs and said other core box part have two opposite rising surfaces and two each other has opposite recesses of the type mentioned.