locking bolt
A technology for locking bolts and bolts, which is applied in mining equipment, earth square drilling, bolt installation, etc. It can solve the problems of difficult fastening force and difficulty in fully utilizing locking bolts, etc., and achieve the effect of full fastening effect
Active Publication Date: 2017-11-14
NISSHIN KOKAN CO LTD +1
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
[0012] In this way, in the expansion-type locking bolt of Patent Document 1, when the bolt main body is driven at an angle to the piling surface, it is difficult to fully exert the fastening force, and an unfixed region is generated near the opening of the drill hole. Therefore, Difficulty fully exploiting the effect of piled lockbolts
Method used
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Embodiment Construction
[0039] Hereinafter, one embodiment of the lock bolt of the present invention will be described with reference to the drawings. figure 1 It is a side view of the lock bolt of this embodiment. In addition, hereinafter, for convenience of description, the inner end side of the drilled hole into which the lock bolt is inserted is referred to as the "top end side", and the opposite side is referred to as the "rear end side".
[0040]
[0041] Such as figure 1 As shown, the locking bolt has a bolt main body 1 formed of a steel pipe and a washer 2 for pressing the piling surface, and the washer 2 has a through hole 21 through which the bolt main body 1 is inserted. In addition, a tip sleeve 3 is attached to the tip of the bolt main body 1 , while a fixed sleeve 4 is attached to the rear end of the bolt main body 1 . Furthermore, an annular base receiving member 5 (base receiving portion) is attached to the distal end side of the fixed sleeve 4 , and the base receiving member 5 ...
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The present invention provides an expansion-type locking bolt capable of exhibiting a sufficient fastening effect even when piling is driven at an angle to the piling surface. The locking bolt includes: a bolt main body having an inner space and having a recess at least in one place in the cross-sectional shape, including a special-shaped steel pipe that expands the recess by plastic deformation by injecting pressurized fluid into the inner space, and one end The part is sealed; the fixed sleeve; it is fixed to the other end of the bolt body, and has the injection hole of the pressurized fluid communicated with the inner space of the bolt body; the washer has a piling surface abutting against the bolt body. The abutting part of the above-mentioned bolt body is inserted through the through hole, and the above-mentioned through hole is separated from the piling surface in the axial direction; and the base receiving part is fixed to the above-mentioned fixed sleeve, and has a It is a contact surface that contacts the through hole of the washer obliquely.
Description
technical field [0001] The invention relates to a locking bolt. Background technique [0002] In the past, various types of locking bolts have been proposed for strengthening mines (natural ground) and tunnels. For example, Patent Document 1 proposes an expansion-type lock bolt having a bolt body that expands (expands) with a pressurized fluid. In more detail, the bolt main body of the locking bolt adopts a special-shaped pipe structure, and the special-shaped pipe structure is formed after a cylindrical copper pipe with an inner space is flattened to form a cross-sectional shape extending in the axial direction. Deformation in the way of the concave part. In addition, sleeves are attached to the front end and the rear end of the bolt body to seal the front end and the rear end of the bolt body. Next, when performing construction, first, the bolt main body is inserted through the through hole of the washer, and the bolt main body is inserted into the drilled hole formed i...
Claims
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IPC IPC(8): E21D20/00
Inventor 石原淳武藤宏行辛岛典义西畑三鹤
Owner NISSHIN KOKAN CO LTD