DE1927768C3 - Offset shield arrangement behind mechanized expansion - Google Patents

Description

The subject of the main patent relates to an offset shield arrangement behind a mechanized, So self-wandering expansion with the support of the offset plate by stamp, such that to the Bottom rails or articulated cylinders with pistons at the punch feet of the mechanized expansion are arranged, which are articulated to the upper and lower part of the offset shield.

It is known to arrange a two-part shield to shield the offset, which by a The upper part of the punch is pressed against the hanging wall, the foot of the punch with the lower part of the shield is connected.

According to the main patent, two cylinders are consequently parallel over the lying on the lower part attacking the offset shield and attacking two more stamps on the upper part of the shield, each on the foot of the mechanized expansion arranged mechanized expansion controllable unit, which in particular underpins the hanging wall when the mechanized expansion moves, so one of the frames is detached from the hanging wall.

It is therefore essential that the offset shield is independent of the mechanized expansion with which it is only is connected via cylinder or stamp. These cylinders and stamps can be controlled accordingly at the same time serve as a feed cylinder for the extension frame. For this it is not absolutely necessary that the The cylinder attacking the shield head is connected to the bottom rail of the moving frame, he can also attack the foot of a stamp of the hiking frame.

To now also those mentioned at the beginning, by means of a stamp

shield parts that can be slid into one another in a further development of the support according to the Hauptpate.it on the expansion to support, the present invention provides that

S each cylinder linked to the extension base on the Base of the lower shield, cylinder on the upper part of the

Attack the lower shield and cylinder on the upper part of the upper shield.

According to a further feature of the invention is

ίο advantageous that the pressure chambers of each the cylinders attacking the upper parts of the shields are interconnected. These cylinders can consequently be controlled jointly, whereas the one connected to the lower part of the lower shield

The cylinder is separately controllable in this one

Context, it is then advantageous that the lower Upper shield rounded to support the upper shield

is

One advantage of the training according to the invention is

in that the lower part of the lower shield is under the protection of the upper shield can be tightened. So there is the possibility that the Lower shield ia the form of an independent unit with the mechanized expansion articulated and displaceable The upper shield can then be connected to the

Be followed up as part of a subsequent step,

where he can bend over the curve in the upper area of the lower shield.

According to the invention, then, the upper shield

just like the lower shield each supported by two cylinders, the support of the lower Shield, however, directly on the expansion, the support of the upper one, however, by the one on the lower shield attacking cylinder and attacking the expansion takes place

By the support according to the invention such agility is produced that by optionally Control of all cylinders all fracture construction conditions can be met.

In order to safely intercept the shields as they collapse, it is advisable to have two cylinders next to each other to arrange.

The drawing shows an embodiment in the face cross-section.

In the foot area of the mechanized expansion 13, the cylinders 8, 9 and 10 are articulated. This supports the cylinder 8 the lower part of a lower shield 6, the cylinder 9 the upper part of the lower shield 6 and the cylinder 10 the upper part of an upper shield 7. Both shield parts 6 and 7 are through a another cylinder 12 clamped between hanging and lying.

All cylinders can be controlled independently of one another by a control valve 5. It is

SS, however, also possible, the pressure chambers 11 of the cylinders 9

and 10 to connect to each other via lines 3, 4 and jointly control, while the cylinder 8 via the lines 1 and 2 can be controlled separately.

The drawing illustrates only an offset

sign arrangement. It is useful, however, to design the stamp arrangement twice and so behind to follow a team of mechanized expansion with a wide shield.

1 sheet of drawings

Claims (3)

Patent claims: 1. Offset shield arrangement behind mechanized expansion, with on the base rails of the expansion Cylinder with piston are articulated with the upper or lower part of a Offset shield are articulated, according to patent 19 03 181, and the shield from two against each other displaceable, braced against the hanging wall and the lying surface by hydraulic cylinders Shield parts consists, characterized in that each articulated on the extension lower part Cylinder (8) at the foot of the lower shield (6), cylinder (9) at the upper part of the lower shield (6) and the cylinder (10) engage the upper part of the upper shield (7). 2. Vcrsatzschilder arrangement according to claim 1, characterized in that the pressure chambers (11) of the respective on the upper parts of the shields (6, 7) attacking cylinder (9,10) are interconnected. 3. offset shield arrangement according to claim 1 or 2, characterized in that the lower shield (6) is rounded at the top to support the upper shield (7)