JP2005061035A - Tail seal brush in tunnel boring machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the fall-out of bristles of a brush material constituting a tail seal brush in a tunnel boring machine. <P>SOLUTION: In this tail seal brush in the tunnel boring machine, the brush material 1 of the seal brush 4 is held by inner and outer protective plates 6, and a brush clamping implement 3 of a base part of the seal brush 4 and base parts of the inner and outer protective plates 6 are held in a brush holder 8 of U-shaped cross section. The U-shaped brush holder 8 is attached to the inner peripheral surface of a tail part 14 of the tunnel boring machine, and the tip part of the brush material 1 extended from the U-shaped brush holder 8 is brought into pressure contact with the outer peripheral surface of a buried pipe for tunnel construction pushed out of the tail part 14 by the resilience of the outer protective plate 6, to attain a tail seal. A keep plate 12 formed of a flat plate is fitted by welding to the inner surface of the U-shaped brush holer 8 facing the opening edge part of a side plate 5 of the U-shaped brush clamping implement 3, and the opening edge part of the side plate 5 of the U-shaped brush clamping implement 3 is pressed in a contracted closing direction by the keep plate 12. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a tail seal brush attached to a tail portion of a tunnel excavator.

  Conventionally, the base of the brush material is clamped and held by a U-shaped brush clamping tool to form a seal brush, and the brush material of the seal brush is sandwiched between an outer protective plate made of a spring plate and an inner protective plate. The base of the brush and the base of the inner and outer protection plates are held in a U-shaped brush holder, and the U-shaped brush holder is attached to the inner peripheral surface (skin plate inner peripheral surface) of the tail portion of the tunnel excavator. A structure in which a tip end portion of the brush material extended from a holder is brought into pressure contact with an outer peripheral surface of a tunnel construction buried pipe (segment) pushed out from the tail portion by the elasticity of the outer protective plate to achieve tail sealing; A tail seal brush in a tunnel excavator is known.

  With this tail seal brush, there is a problem that a strong pulling force acts on the seal brush as the tunnel excavator advances and the tunnel construction buried pipe is pushed out, causing backlash and hair loss and lowering the sealing function. ing.

  As a means for solving the above problem, Patent Document 1 attaches a round wire made of copper wire to the outer surface of the edge of the side plate mouth of the U-shaped brush clamping tool by welding, and attaches the round wire to the U-shaped brush clamping tool. The U-shaped brush holder is configured to be held by the stacked protective plates.

That is, as a pressing means for the U-shaped brush clamping tool forming the seal brush, the round wire is welded to the outer surface of the side plate mouth edge of the U-shaped brush clamping tool in advance, and the round wire is welded. When the base part of the sealed brush is held in the U-shaped brush holder, the side wire lip of the U-shaped brush clamp is pressed in the contraction direction while pressing the round wire with the protective plate. It is intended to prevent the side plate of the clamping tool from opening.
JP-A-8-13986

  However, since the round wire as the pressing means is attached to the seal brush itself on which the pulling force acts, that is, the U-shaped brush clamping tool itself, the pulling force causes slipping on the contact surface between the round wire and the protective plate. There is a risk that the seal brush may move, and there is a problem that the positioning becomes difficult when the seal brush is stacked in two or more stages.

  In addition, since the U-shaped brush clamping tool uses a thin plate material, when the round wire is welded to the side plate of the brush clamping tool made of this thin plate material, the heat material causes thermal embrittlement of the brush material, causing breakage and hair loss. In addition, there is a problem that a hole is formed in the side plate, and it is difficult to firmly attach the round wire to the side plate of the sandwiching tool.

  This invention provides the tail seal brush in the tunnel excavator which solves the said subject.

  The present invention eliminates the method of welding the round wire to the side plate mouth edge of the U-shaped brush clamp, and flattenes the inner surface of the U-shaped brush holder facing the side plate mouth edge of the U-shaped brush clamp. When the presser plate made of is attached by welding and the base of the seal brush is held in the U-shaped brush holder, the outer surface of the side plate mouth edge of the U-shaped brush clamping tool is held by the presser plate. Is configured so as to prevent the same side plate from being opened.

  Preferably, the outer surface of the side plate mouth edge portion of the U-shaped brush clamping tool is pressed in the contraction direction with the edge of the presser plate to improve the opening preventing action.

  According to the present invention, since the press plate is integrally attached by welding to the U-shaped brush holder itself fixed to the tail portion of the tunnel excavator, the press plate integrated with the holder, that is, the U The U-shaped brush sandwiching tool that reliably exerts a strong pressing force (side plate opening prevention force) against the side plate of the letter-shaped brush sandwiching tool and exhibits a braking force against the seal brush (U-shaped brush sandwiching tool). With respect to the pull-out force for moving the rod, it can be expected that the presser force and the braking force will be strengthened more and more, effectively solving the problems in the tail seal brush and ensuring the initial purpose.

  In particular, when the edge of the press plate is applied to the side plate mouth edge portion of the brush clamping tool, the press force (side plate opening preventing force) and the braking force can be generated more effectively.

  The best mode for carrying out the present invention will be described below with reference to FIGS.

  A brush material 1 made of a metal wire is folded in two across a core wire 2, and the bent base portion is clamped and held together with the core wire 2 by a metal brush clamp tool 3 having a U-shaped cross section. Form.

  The brush clamping tool 3 squeezes the intermediate part of the opposing side plate 5 at the upper part of the core wire 2 to prevent the escape of the core wire 2 and the escape of the brush material 1. Accordingly, the opposing side plates 5 are inclined such that the mouth edge portion becomes narrow.

  A protective plate 6 made of a spring steel plate is overlapped on one side and the other side of the brush material 1 of the seal brush 4, that is, opposite outer sides, and the seal brush 4 is sandwiched between inner and outer protective plates 6. The base portion of the inner and outer protective plates 6 are held in a metal brush holder 8 having a U-shaped cross section, and the brush material 1 and the inner and outer protective plates 6 are moved outward from the opening of the brush holder 8. The tail seal brush is formed.

  In the tail seal brush, the outer plate 9 of the U-shaped brush holder 8 is applied to the inner peripheral surface of the tail portion (skin plate) 14 of the tunnel excavator, and is attached by welding and arranged in an annular shape along the inner peripheral surface. .

  Therefore, the tunnel construction buried pipe in which the tip of the brush material 1 extended from the opening of the U-shaped brush holder 8 together with the inner and outer protective plates 6 is pushed out from the tail portion 14 by the elasticity of the outer protective plate 6. A tail seal is made by press-contacting with the outer peripheral surface of the plate.

  A pressing plate 12 made of a flat plate is attached to the inner surface of the U-shaped brush holder 8 facing the rim of the side plate 5 of the U-shaped brush clamping tool 3 by welding, and the U-shaped brush clamping is performed by the pressing plate 12. The outer surface of the mouth edge portion of the side plate 5 of the dressing 3 is pressed in the contraction direction to prevent the mouth edge portion of the side plate 5 from opening.

  As a preferred example, the presser plate 12 is disposed so that its base side edge 13 is in pressure contact with the outer surface of the lip of the side plate 5 of the U-shaped brush clamping tool 3.

  The U-shaped brush holder 8 sandwiches the base of the seal brush 4 between the inner and outer plates 9 and pressurizes the U-shaped brush holder 8, and the base of the inner plate 9 and the end of the bottom plate 10 bent in an L shape from the base of the outer plate 9. The ends are integrated into a U-shape by welding 11.

  Thus, an outer presser plate 12 made of an elongated flat plate is attached to a predetermined position on the inner surface of the outer plate 9 forming the U-shaped brush holder 8 by lap welding 15, and is similarly elongated at a predetermined position on the inner surface of the inner plate 9. The inner presser plate 12 made of a flat plate is attached by lap welding 15.

  As described above, the inner / outer presser plate 12 is welded in advance, and the inner / outer presser plate 12 is preliminarily welded to the opposite outer surface of the seal brush 4 while pressurizing, and the welding 11 is performed to hold the inner / outer presser plate 12 between the brushes. A pressurized state is formed on the edge of the side plate 5 of the tool 3.

  The inner and outer protective plates 6 are arranged so as to be spaced apart from the both sides 3 and 12 so that the base ends thereof do not overlap the brush clamp 3 and the presser plate 12, and the inner surfaces of the inner and outer plates 9 of the brush holder 8. Overlay on.

  The headed rod 7 is inserted into the inner and outer protective plates 6 and the brush material 1, the head of the headed rod 7 is brought into contact with one side plate 9, and the tip is welded to the other side plate 9 to Prevent escape.

  As shown in FIG. 2, the seal brush 4 holds the base of the single seal brush 4, and thus the single brush clamp 3 in the brush holder 8, and the outer plate 5 of the brush clamp 3. The outer surface of the mouth edge is pressed in the contracting direction by the outer pressing plate 12, and the outer surface of the mouth edge of the inner plate 5 of the clamping device 3 is pressed in the contracting direction by the inner pressing plate 12. Press. Preferably, the base side edge 13 of the inner / outer presser plate 12 is brought into pressure contact with the outer surface of the rim portion of the side plate 5 of the U-shaped brush clamping tool 3.

  Alternatively, as shown in FIG. 3, a plurality of seal brushes 4 are stacked and the base portion thereof is held in the brush holder 8 to form the outer edge plate 5 of the outer plate 5 of the brush clamping tool 3 that forms the outer-stage seal brush 4. The outer presser plate 12 presses the outer side surface, and the inner presser plate 12 presses the outer edge surface of the outer plate 5 of the brush clamping tool 3 that forms the inner-stage seal brush 4. Preferably, the base side edge 13 of the outer presser plate 12 is brought into pressure contact with the outer surface of the outer edge of the outer plate 5 of the U-shaped brush clamping tool 3 at the outer stage, and the base side edge 13 of the inner presser plate 12 is pressed. Is brought into pressure contact with the outer surface of the outer edge of the outer plate 5 of the U-shaped brush clamping tool 3 at the inner stage.

  As described above, the presser plate 12 is integrally attached by welding to the U-shaped brush holder 8 itself fixed to the tail portion 14 of the tunnel excavator, and the concern about the sliding movement due to the pulling force applied to the seal brush 4 is eliminated. Is done.

  The holding plate 12 integral with the holder 8, that is, the holder 8 exerts a strong pressing force in the direction of contraction with respect to the side plate 5 of the U-shaped brush clamping tool 3 (opening prevention force of the side plate 5).

  In addition, it exerts a braking force when the seal brush 4 (U-shaped brush clamping tool 3) moves against the pulling force. In particular, when the edge 13 of the presser plate 12 is applied to the mouth edge portion of the side plate 5 of the brush clamping tool 3, the presser force (side plate unstopping force) and the braking force are more effectively generated. Can do.

The perspective view which decomposes | disassembles and shows the tail seal brush in a tunnel excavator. Sectional drawing which shows an example of the tail seal brush in a tunnel excavator. Sectional drawing which shows the other examples of the tail seal brush in a tunnel excavator.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Brush material, 2 ... Core wire, 3 ... Brush clamping tool, 4 ... Seal brush, 5 ... Side plate of brush clamping tool, 6 ... Inner / outer protection plate, 7 ... Headed hook, 8 ... Brush holder, 9 ... Inner and outer plates of the brush holder, 10 ... Bottom plate of the brush holder, 11 ... Welding, 12 ... Inner / outer presser plate, 13 ... Edge of the presser plate, 14 ... Tail portion of the tunnel excavator, 15 ... Welding

Claims (2)

A base portion of the brush material is clamped and held by a U-shaped brush clamping tool to form a seal brush, and the brush material of the seal brush is sandwiched between an outer protective plate made of a spring plate and an inner protective plate. The above brush material extended from the U-shaped brush holder by holding the base and the base of the inner and outer protective plates in a brush holder having a U-shaped cross section, attaching the U-shaped brush holder to the inner peripheral surface of the tail portion of the tunnel excavator In the tail seal brush in a tunnel excavator configured to press-contact the tip of the outer surface of the tunnel construction buried pipe pushed out from the tail portion by the elasticity of the outer protective plate to achieve tail seal, A press plate made of a flat plate is attached to the inner surface of the U-shaped brush holder facing the edge of the side plate mouth of the U-shaped brush clamping tool by welding, and the U-shaped brush clamp is held by the press plate. Tail seal brushes in tunneling machine, characterized in that the side plate opening edge of the sushi was configured to pressurize the Chijimi閉 direction. 2. A tail seal brush in a tunnel excavator according to claim 1, wherein the edge of the press plate pressurizes the side plate mouth edge of the U-shaped brush clamping tool in the contracting direction.

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