JPH0545674Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a tail seal brush that prevents earth and sand from flowing in between the tail portion and extrusion segment of a shield tunneling machine.

Prior Art As shown in Fig. 1, a conventional tail seal brush has a brush material 3 made of metal wire or the like sandwiched and held by a U-shaped fitting 1, and the U-shaped fitting 1 is attached to the inner peripheral surface of the tail portion of an excavator. Installed in a circular arrangement (welded),
The bristles of the brush material are pressed against the outer peripheral surface of the segment. In addition, in order to press this brush material, the brush material is held by the U-shaped mounting hardware 1 so as to be sandwiched between inner and outer protective plates 5 and 6 made of spring steel plates, and the segments are While protecting the brush material during extrusion, the elasticity of the protective plates 5 and 6 is used to provide the above-mentioned pressing force.

In addition, since the above-mentioned brush material is inexpensive and easy to uniformly implant and handle, the brush material 3 is folded in half over the core material 7 as shown in FIG. In many cases, these unit brushes 2 are stacked in multiple layers as shown in FIG. The brush material 3 is clamped and held at the inner bottom, and extends from there toward the front of the U-shaped mounting hardware 1.

Problems to be solved by the invention However, in this type of tail seal brush that uses brush material as a sealing material, it is functionally important that the brush material is implanted with a uniform thickness, but the major drawback is that the brush material is implanted with a uniform thickness. Having problems with hair breakage and hair loss.

Therefore, even in the tail seal brush having the configuration explained in FIG. 1, a large impact is applied to stretch the protection plates 5 and 6 during segment extrusion, etc., and at this time, a strong tensile force (removal force) is applied to the brush material 3. This causes a problem in that the brush material 3 and the core material 7 fall out due to this impact. This may result in seal defects or loss of seal function.
The solution to this problem is a matter of concern.

The present invention fundamentally solves the above structural defects in the tail seal brush having the above structure, and makes effective use of its advantages.

Means for Solving the Problems The present invention provides a tail seal brush in which unit brushes having the above structure are stacked in multiple layers and sandwiched between inner and outer protective plates and held by U-shaped mounting hardware. Each unit brush is held by a brush material holding metal fitting and a core wire, and focusing on the fact that these are included in the inner bottom of the U-shaped fitting, the holding fitting and core material are held on both sides of the U-shaped fitting. The two exposed ends are welded to both ends of the inner bottom of the U-shaped fitting to rigidly connect the three parts as one body, and the brush material is firmly attached to the U-shaped fitting via the core material. It is.

Function As mentioned above, the unit brush retaining metal fitting and the core material that are present in the inner bottom of the U-shaped fitting are rigidly connected to both ends of the inner bottom of the U-shaped fitting at both ends through welding, and are themselves U-shaped. A retainer that securely prevents the brush material from separating from the U-shaped mounting hardware, opens the core material, and firmly retains the brush material on the U-shaped mounting hardware, and also clamps and holds the core material and the base of the brush material. It firmly captures both without causing any separation, and extremely reliably and effectively solves the pending problems of the brush material coming off and the core material escaping.

Embodiment The present invention will be explained below with reference to FIGS. 3 to 5.

As mentioned above, the unit brush 2 used for the unit tail seal brush is made by folding the brush material 3 made of metal wire or the like over the core material 7 and holding the brush material holding fitting 4 together with the core material 7 at the bent base. It has a structure in which it is held in place by sandwiching it.

The unit brushes 2 are stacked in multiple layers and sandwiched between an inner protection plate 5 and an outer protection plate 6 made of a spring steel plate,
These are clamped and held by thick U-shaped mounting hardware 1,
The brush material holding fitting 4 is housed in the inner bottom of the U-shaped fitting 1, and the brush material 3 is extended from there to the front of the U-shaped fitting 1.

The inner and outer protective plates 5 and 6 are bent in a dogleg shape at their free ends protruding from the U-shaped mounting hardware 1, and are arranged so that their elasticity presses the bristles of the brush material 3 against the outer peripheral surface of the segment. ing.

Also, the U-shaped mounting hardware 1 has one arm 1a.
is attached by welding 8, and before welding, the unit brush 2 stacked in multiple layers on the other arm 1b and the inner and outer protection plates 5, 6 are pressed, and the above-mentioned welding 8 is performed. At the same time, the pin 12 is passed through between one arm 1a and the other arm 1b, and the ends of the pin are welded or caulked to the arms 1a and 1b to perform the above-mentioned clamping and holding.

With the above configuration, the brush material holding fitting 4 and the core material 7 of the unit brush 2 are connected to the U-shaped mounting fitting 1.
It extends along the inner bottom of the
Both sides of the shaped fitting 1 are exposed.

The brush material holding fitting 4 and the core material 7 are welded to both ends of the inner bottom portion of the U-shaped fitting 1 at both ends thereof. In the figure, 9a and 9b indicate the welding, that is, the build-up of the welding.

As shown in the figure, the welds 9a and 9b are connected to the core material 7 and the brush material holding fitting 4 in each unit brush 2.
At the same time, the core material 7 and the brush material holding fitting 4 are jointly attached to the inner bottom of the U-shaped fitting.

As described above, while the unit brush 2 receives a clamping force from the U-shaped fitting 1, both ends of the core material 7 and both ends of the brush material holding fitting 4 are welded to the welds 9a, 9.
The brush material 3, which is held astride the core material 7, is rigidly connected to both ends of the inner bottom of the U-shaped mounting hardware 1 through the U-shaped mounting hardware 1, respectively, and cannot be separated. By being welded to both ends of the inner bottom of the U-shaped fitting 1, it is firmly attached to the U-shaped fitting via the core material 7. At the same time, the holding fittings 4 that sandwich and hold the core material 7 and the base of the brush material 3 can be prevented from opening, and both (the core material and the base of the brush material) are firmly captured. This further strengthens the retaining force of the brush material.

As shown in FIG. 4, the unit tail seal brushes thus formed are arranged in an annular shape along the inner peripheral surface of the tail portion 10 of the excavator, and attached to the respective U-shaped fittings 1.
It is attached to the tail portion 10 by welding 11 or the like, and the tensile strength against the brush material tensile force during use is obtained by the retention force of the brush material via the welds 9a and 9b.

Effects of the invention As explained above, the holding fitting and core material of the unit brush, which are present in the inner bottom of the U-shaped mounting bracket, are rigidly connected at both ends to both ends of the inner bottom of the U-shaped mounting bracket through welding. At the same time, the brush material is reliably prevented from separating from the U-shaped mounting hardware, and at the same time, the brush material is firmly attached to the U-shaped mounting hardware via the core material whose both ends are welded, and the core material and the base of the brush material are The holding metal fittings that clamp and hold the two firmly capture the two without causing unnecessary opening, and extremely reliably and effectively solve the pending problems of the brush material coming off and the core material escaping.

Moreover, the problem of sealing defects in a tail seal brush using a brush material as a sealing material can be solved by the above, and the advantages of using a unit brush having the above structure can be effectively utilized.

[Brief explanation of the drawing]

Fig. 1 is a side view of a tail seal brush in a conventional shield tunneling machine, Fig. 2 is a perspective view of a unit brush, Fig. 3 is a perspective view of a tail seal brush according to an embodiment of the present invention, and Fig. 4 is a side view of the same. , FIG. 5 is a plan view with the same part cut away. 1...U-shaped mounting hardware, 2...Unit brush, 3...
...Brush material, 4...Brush material holding fitting, 5, 6...
...Protective plate, 7... Core material, 8, 9a, 9b, 11...
...Welding, 10...Tail part.

Claims (1)

[Scope of utility model registration request] The brush material is folded in two over the core material, and the bent base is held between the brush material holding fittings together with the core material to form a unit brush, and the unit brushes are stacked in multiple layers and serve as an inner protection plate. A unit tail seal brush is formed by sandwiching and holding it between the outer protective plates and the U-shaped fitting so that the brush material holding fitting is included in the inner bottom of the U-shaped fitting, and a large number of the unit tail seal brushes are In the tail seal brush for a shield tunneling machine, which is arranged and attached to the inner peripheral surface of the tail part of the tunneling machine in an annular manner using the U-shaped mounting hardware, both ends of each brush material holding fixture and both ends of the core material in each of the unit brushes are provided. A tail seal brush for a shield excavator, which is integrally welded to both ends of the inner bottom of the U-shaped fitting.