JPH0426664U

JPH0426664U -

Info

Publication number: JPH0426664U
Application number: JP6821990U
Authority: JP
Priority date: 1990-06-27
Filing date: 1990-06-27
Publication date: 1992-03-03

Description

[Brief explanation of the drawing]

第１図および第２図は、本考案による引き抜き
棒の一実施例がそれぞれ作動状態および非作動状
態にあるときの側面図を上ノズルとともに示す図
であり、手前側に配置されるべき棒片の一部は、
図を見易くするために省略してある。第３図は、
従来の引き抜き棒が作動状態にあるときの側面図
を上ノズルとともに示す図である。５……溶鋼容器、６……上ノズル、６ａ……上
ノズルの内周面、６ｂ……上ノズルの外周面、７
……引き抜き棒、８……芯金、８ａ……拡大先端
部分、９……スリーブ、１０……係止部材、１０
ａ……棒片、１０ｃ……孔。 FIGS. 1 and 2 are side views showing an embodiment of the pull-out rod according to the present invention in an operating state and a non-operating state, respectively, together with an upper nozzle, and show the rod to be placed on the front side. Some of the
The figure has been omitted for clarity. Figure 3 shows
FIG. 3 is a side view showing a conventional drawing rod in an operating state together with an upper nozzle. 5... Molten steel container, 6... Upper nozzle, 6a... Inner peripheral surface of the upper nozzle, 6b... Outer peripheral surface of the upper nozzle, 7
... Pull-out rod, 8 ... Core bar, 8a ... Enlarged tip portion, 9 ... Sleeve, 10 ... Locking member, 10
a...rod piece, 10c...hole.

Claims

[Scope of utility model registration request]

To pull out the upper nozzle, which is installed at the bottom of a bottom-out type molten steel container and has a tapered inner surface tapered downward and a tapered outer surface tapered upward. The drawing rod includes a rod-shaped core metal having an enlarged tip portion tapered to a thicker end, a sleeve slidably mounted on the core metal, and the enlarged tip portion and the sleeve in a non-operating state. consisting of a plurality of rod pieces positioned so as to extend in the longitudinal direction of the core metal between them, and a plurality of rod pieces tied together in a ring around the core metal at an end remote from the enlarged tip portion. and a locking member that is slidable on the core metal, and the diameter of each part in the non-operating state is set to a value that allows insertion into the upper nozzle, and when in operation, the locking member is inserted into the upper nozzle. When relative sliding occurs between the core metal and the locking member and the locking member engages on the enlarged tip portion, the plurality of rod pieces expand outward around the binding end. An upper nozzle pull-out rod that can be opened and locked to the inner circumferential surface of the upper nozzle.