JP2012177422A - Lock bolt fastening and calking tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To carry out fastening and calking work at the same time.SOLUTION: A lock bolt fastening and calking tool includes: a fastening portion 2 having, at a tip thereof, a fitting protrusion 2a fitting in a fitting recess 11c provided in an end surface of a head 11a of a bolt 11; a calking portion 3 provided, on an inner wall surface 3b of a housing 3a where the head 11a of the bolt 11 and a lock member 12 can be fetched in, with protrusions 3c for pressing a part of the lock member 12 into the periphery of the head 11a of the bolt 11 as the bolt 11 moves in a fastening direction; and a body 4 in which the fitting protrusion 2a of the tip of the fastening portion 2 is disposed in the housing 3a of the calking portion 3, and the calking portion 2 is movable along the center axis C4 such that the tip of the fitting protrusion 2a goes in and out of the housing while restricting the rotation of the fastening portion 2 around the center axis C4 in the fastening direction of the bolt 11.

Description

  The present invention relates to a lock bolt tightening caulking tool capable of performing both a lock bolt tightening operation and a caulking operation for locking the lock bolt.

  2. Description of the Related Art Conventionally, for example, a screw rotation prevention structure for a nuclear reactor structure described in Patent Document 1 is provided with a sleeve that surrounds the periphery of the bolt head on the bolt head side of an object to be tightened. A caulking groove is formed in the outer peripheral portion of the screw, and a sleeve is caulked into the caulking groove to prevent rotation of the screw, and is configured as a so-called lock bolt (see FIG. 1).

  Patent Document 1 described above does not describe a tightening tool for tightening a bolt against a lock bolt, or a caulking tool for caulking a sleeve into a caulking groove of a bolt head. For example, when using a tightening tool and a caulking tool to perform a locking bolt tightening operation and a caulking operation, respectively, a tightening operation using a tightening tool, and a caulking operation using a caulking tool instead of the tightening tool. Since work must be performed separately, workability is poor. In particular, for example, when applying the above-described lock bolt to fix a holding member that holds a shim plate disposed between an upper lid of a pressurized water reactor and a structure fixed to the upper lid, In an environment where there is a risk of exposure to radiation, it is desired to improve workability in order to shorten the work time for fixing the lock bolt.

  Note that the tightening / caulking tool described in Patent Document 1 is a combination of a driver shaft and a caulking tool. This tightening and caulking tool is a tool that causes the base material to bite into the engagement groove portion of the screw by crimping the base material with a caulking tool and then plastically deforming it after the screw is tightened to the base material by the driver shaft. It cannot be adapted to.

JP-A-9-250533 No. 2-343667

  This invention solves the subject mentioned above, and had a bolt fastened with respect to a to-be-fixed part, and a lock member which fits to the to-be-fixed part side, and was crimped around the head of a bolt. An object of the present invention is to provide a lock bolt tightening and swaging tool that is compatible with a lock bolt and capable of performing both a bolt tightening operation and a lock member crimping operation.

  In order to achieve the above-described object, a tightening and tightening tool for a lock bolt according to the present invention is a lock having a bolt that is tightened to a fixed portion and a lock member that is swung around the head of the bolt. A locking bolt tightening and crimping tool for tightening the bolt and caulking the lock member, wherein the fitting convex portion is fitted to the fitting concave portion of the head end surface of the bolt. The locking member and the inner wall surface of the cylinder surrounding the bolt head and the lock member are arranged on the periphery of the bolt head as the bolt moves in the tightening direction. A caulking portion provided with a protrusion for pushing the portion, and a fitting convex portion of the tightening portion are arranged in a cylinder of the caulking portion, and the tightening portion is rotated about the tightening direction of the bolt. Regulation , Characterized in that the fitting convex portion and a body portion capable provided moving part the tightening along said central axis in a manner infested in the outer of said tubular body.

  According to this lock bolt clamping caulking tool, the bolt is fastened to the fixed portion by fitting the fitting convex portion of the tightening portion into the fitting concave portion of the bolt and rotating the main body portion. After that, with the fitting convex part fitted into the fitting concave part of the bolt, the projection is made to move the main body part along the central axis so as to surround the lock member with the cylindrical body of the caulking part. Push a part of the lock member around the head. For this reason, the tightening operation for tightening the bolt to the fixed portion and the caulking operation for crimping the lock member and pushing it around the head of the bolt can be performed together.

  Further, the locking bolt clamping caulking tool of the present invention is a holding means for holding the clamping part in a state in which the fitting convex part at the tip of the clamping part protrudes outside the cylindrical body of the crimping part. It is characterized by providing.

  According to this lock bolt tightening caulking tool, during the tightening operation of tightening the bolt, the tightening work is held in a state in which the fitting convex portion of the tightening portion is fitted in the fitting concave portion of the bolt. It can be done easily. In addition, when the caulking work is carried out by caulking the lock member and pushing it around the head of the bolt, the fastening projection of the fastening portion is held in a state of being fitted into the fitting recess of the bolt. Since the movement of the caulking portion is guided, the caulking work can be easily performed.

  In the lock bolt tightening and crimping tool according to the present invention, the holding means is formed of an elastic member that is disposed on the main body portion and biases the tightening portion with an elastic force.

  According to this lock bolt clamping caulking tool, the holding projection can be held in a state in which the fitting projection of the clamping portion is fitted to the fitting recess of the bolt simply by pressing the main body in the direction of the bolt. Is easy and is useful for improving workability.

  Further, the locking bolt tightening and caulking tool of the present invention is provided with a fitting groove around the bolt, and the fitting convex portion of the tightening portion and the fitting concave portion of the bolt are fitted, The positions of the fitting groove and the projection of the caulking portion are matched.

  The lock bolt can firmly prevent rotation of the bolt by caulking a part of the lock member with a protrusion into a fitting groove provided around the bolt. According to this lock bolt tightening caulking tool, the fitting groove and the protrusion are positioned by fitting the fitting convex portion of the tightening portion and the fitting concave portion of the bolt. It becomes useful for improvement.

  In addition, the locking bolt tightening and caulking tool of the present invention is characterized in that a plurality of sets of the fitting groove and the protrusion are provided.

  According to this lock bolt tightening caulking tool, it is possible to firmly prevent the bolt from rotating by caulking and pushing a part of the lock member at a plurality of locations.

  In the lock bolt tightening and caulking tool according to the present invention, a plurality of the fitting grooves are provided at opposed positions around the bolt, and the protrusions correspond to the fitting grooves and are opposed to the cylindrical body. It is characterized in that a plurality are provided.

  According to this lock bolt tightening caulking tool, it is possible to firmly prevent the bolt from rotating by caulking and pushing a part of the lock member at the facing position.

  According to the present invention, a lock bolt having a bolt to be fastened to a fixed portion and a lock member fitted to the fixed portion side and caulked around the head of the bolt is fitted. The attaching operation and the caulking operation of the lock member can be performed together.

FIG. 1 is a schematic view showing an application example of a lock bolt. FIG. 2-1 is a partially cut side view of the bolt of the lock bolt. FIG. 2-2 is a plan view of the bolt of the lock bolt. FIG. 3A is a side sectional view of the lock member of the lock bolt. FIG. 3-2 is a plan view of the lock member of the lock bolt. FIG. 3C is a bottom view of the lock member of the lock bolt. FIG. 4-1 is a side view of a holding member used for the lock bolt. FIG. 4-2 is a plan view of a holding member used for the lock bolt. FIG. 4-3 is a front view of a holding member used for the lock bolt. FIG. 5A is a side view of the lock bolt in use. FIG. 5-2 is a plan view of the lock bolt in use. FIG. 5-3 is a front sectional view of the lock bolt in use. FIG. 6A is a side sectional view of the lock bolt tightening caulking tool according to the embodiment of the present invention. FIG. 6-2 is a sectional side view of the lock bolt clamping caulking tool according to the embodiment of the present invention. FIG. 7 is a side sectional view of another example of a locking bolt tightening and caulking tool according to an embodiment of the present invention. FIG. 8-1 is a sectional side view of the lock bolt tightening caulking tool according to the embodiment of the present invention in use. FIG. 8-2 is a side sectional view of the usage state of the locking bolt tightening and crimping tool according to the embodiment of the present invention.

  Embodiments according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In addition, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same.

  FIG. 1 is a schematic view showing an application example of a lock bolt. As shown in FIG. 1, the lock bolt 10 includes, for example, a holding member 13 that holds a shim plate 53 disposed between an upper lid 51 of a pressurized water reactor and a structure 52 fixed to the upper lid 51. Applied to fixation. The lock bolt 10 here is attached to the upper lid 51 as a fixed portion. Note that the lock bolt 10 may be used other than the above application.

  Fig. 2-1 is a partially cut side view of the bolt of the lock bolt, Fig. 2-2 is a plan view of the bolt of the lock bolt, and Fig. 3-1 is a side sectional view of the lock member of the lock bolt. 3-2 is a plan view of the lock member of the lock bolt, FIG. 3-3 is a bottom view of the lock member of the lock bolt, and FIG. 4A is a holding member used for the lock bolt. FIG. 4-2 is a plan view of a holding member used for the lock bolt, and FIG. 4-3 is a front view of the holding member used for the lock bolt.

  The lock bolt 10 includes a bolt 11 (see FIGS. 2-1 and 2-2), a lock member 12 (see FIGS. 3-1 to 3-3), and a holding member 13 (FIGS. 4-1 to 4). 3).

  The bolt 11 is fastened to the upper lid 51 as the fixed portion described above. As illustrated in FIGS. 2A and 2B, the bolt 11 includes a head portion 11 a formed in a columnar shape and a male screw portion 11 b that is screwed into the upper lid 51. The head 11a has a fitting recess 11c formed on the end surface thereof. The fitting concave portion 11c is a concave portion into which a later-described tightening caulking tool is fitted. In the present embodiment, the fitting concave portion 11c is formed as a hexagonal hole provided around the central axis C1 that is the tightening direction of the bolt 11. Yes. The fitting recess 11c is not limited to the above hexagonal shape, and may be a polygonal hole such as a triangular shape or a quadrangular shape, a negative shape, or a positive shape. The head 11a has a fitting groove 11d formed on the peripheral side surface thereof. The fitting groove 11d is formed from the end surface of the head portion 11a to the peripheral side surface, and at least one fitting groove is provided. In addition, in the case of a plurality (six in the present embodiment) of the fitting grooves 11d, as shown in FIG. 2-2, the fitting grooves 11d are provided at equal intervals around the central axis C1 of the bolt 11. In addition, in the case where there are a plurality of fitting grooves 11d, as shown in FIG. 2-2, it is preferable that the fitting grooves 11d are provided to face each other based on the central axis C1 of the bolt 11.

  The lock member 12 is fitted to the upper lid 51 side as the fixed portion side and is caulked around the head 11 a of the bolt 11. As shown in FIGS. 3A to 3C, the lock member 12 is formed in a cup shape with a cylindrical portion 12a formed in a cylindrical shape large enough to accommodate the head portion 11a of the bolt 11 at the distal end side. Has been. In addition, the lock member 12 has a through hole 12b that is provided around the central axis C2 that is the tightening direction of the bolt 11 and passes through the male screw portion 11b of the bolt 11 inside the base end side, and the through hole 12b. A flange portion 12c that forms a peripheral edge and contacts the head portion 11a of the bolt 11 is formed. Further, the lock member 12 is formed with a notch groove 12d at the base end thereof, which is orthogonal to the central axis C2 and communicates with the through hole 12b.

  The holding member 13 is fixed to the upper lid 51 by tightening the bolt 11 to the upper lid 51, and abuts the side end surface of the shim plate 53 to hold the mounting position of the shim plate 53 on the upper lid 51. As shown in FIGS. 4A to 4C, the holding member 13 includes a rectangular plate-like fixing piece 13a fixed to the upper lid 51 by tightening the bolt 11 to the upper lid 51, and one side of the fixing piece 13a. The contact piece 13b is bent and extended from the side end face of the shim plate 53 and a part of the upper lid 51. The fixed piece 13a is formed with a ridge 13c on the flat side that is opposite to the direction in which the contact piece 13b bends and extends, into which the notch groove 12d of the lock member 12 described above can be fitted. In addition, the fixing piece 13a is provided at the portion where the protrusion 13c is provided, with the central axis C3 serving as the tightening direction of the bolt 11 described above as a center, and a through hole 13d through which the male screw portion 11b of the bolt 11 passes is formed. Has been. The through hole 13d is formed with an inner diameter smaller than the outer diameter of the lock member 12, and the base end of the lock member 12 abuts on the outer peripheral edge thereof. In the present embodiment, the holding member 13 is provided with two sets of the protrusion 13c and the through hole 13d, and is configured such that two sets of bolts 11 and the lock member 12 are arranged.

  FIG. 5-1 is a side view of the lock bolt in use, FIG. 5-2 is a plan view of the lock bolt in use, and FIG. 5-3 is a front sectional view of the lock bolt in use. It is.

  As shown in FIGS. 5A to 5C, the lock bolt 10 described above is inserted into the through hole 12b of the lock member 12 so that the head portion 11a of the bolt 11 is accommodated in the cylindrical portion 12a of the lock member 12. The male screw portion 11b of the bolt 11 is inserted. In addition, the notch groove 12 d of the lock member 12 is placed on the fixed piece 13 a of the holding member 13 from the proximal end side of the lock member 12 so as to fit into the protrusion 13 c of the holding member 13. Thereby, the male screw portion 11 b of the bolt 11 is inserted into the through hole 13 d of the holding member 13. Then, the male threaded portion 11b of the bolt 11 is screwed and tightened to a female threaded portion (not shown) provided on the upper lid 51 as a fixed portion, so that the contact piece 13b of the holding member 13 is moved to the upper lid 51 side. The lock member 12 and the holding member 13 are fixed to the upper lid 51 while abutting. Thereafter, the cylindrical portion 12 a of the lock member 12 is caulked inward, and the caulked portion is pushed into the fitting groove 11 d of the bolt 11. For this reason, fitting between the cylindrical portion 12a of the lock member 12 and the fitting groove 11d of the bolt 11, fitting between the cutout groove 12d of the lock member 12 and the protrusion 13c of the holding member 13, and contact of the holding member 13 The bolt 11 is prevented from rotating by contact with the upper lid 51 side of the piece 13b.

  In the present embodiment, since the lock bolt 10 is applied to hold the shim plate 53, the holding member 13 that contacts the shim plate 53 is provided. Then, the abutting piece 13b of the holding member 13 abuts on a part of the upper lid 51 as the fixed portion, and the notch groove 12d of the locking member 12 is fitted to the protrusion 13c of the holding member 13, whereby the locking member 12 is configured not to rotate around the central axis C2. Although not limited to this, although not clearly shown in the drawings, a protrusion is provided on the fixed portion side (upper lid 51 side) without using the holding member 13, and the notch groove 12d of the lock member 12 is fitted to the protrusion. Thus, the lock member 12 may be configured not to rotate around the central axis C2.

  Thus, the lock bolt 10 requires a tightening operation for tightening the bolt 11 and a caulking operation for caulking the cylindrical portion 12 a of the lock member 12. Hereinafter, a clamping caulking tool capable of performing these two operations together will be described.

  FIG. 6A is a side sectional view of the locking bolt clamping caulking tool according to the present embodiment, and FIG. 6B is a side sectional view of the locking bolt clamping caulking tool according to the present embodiment. is there.

  As shown in FIGS. 6A and 6B, the tightening and caulking tool 1 includes a tightening portion 2, a caulking portion 3, a main body portion 4, and a holding unit 5.

  The tightening portion 2 is formed in a long bar shape along the central axis C4 that is the tightening direction of the bolt 11, and is fitted at the tip thereof to a fitting recess 11c provided on the end surface of the head 11a of the bolt 11. It has the fitting convex part 2a to do. The fitting convex portion 2a is shaped to be inserted and fitted into the fitting concave portion 11c of the bolt 11, and is formed in a hexagonal cross section provided around the central axis C4. The fitting protrusion 2a is not limited to the hexagonal cross section, and may have a polygonal cross section such as a triangular shape or a quadrilateral shape, a negative shape, or a positive shape in accordance with the shape of the fitting concave portion 11c. Further, the tightening portion 2 has a cross-sectional shape other than the fitting convex portion 2a formed in a polygonal shape (in the present embodiment, a hexagonal shape). The tightening portion 2 configured as described above has the central axis C4 coincident with the central axis C1 of the bolt 11 by fitting the fitting convex portion 2a into the fitting concave portion 11c of the bolt 11. Then, the tightening portion 2 rotates around the central axis C1 by rotating around the central axis C4, and tightens the bolt 11 against the upper lid 51 as a fixed portion.

  The caulking portion 3 has a cylindrical body 3a formed in a cylindrical shape so as to surround the head portion 11a of the bolt 11 and the lock member 12 in the lock bolt 10 described above. The cylindrical body 3a has a tip that is open along a central axis C4 that is a tightening direction of the bolt 11, and an inner wall surface 3b that is formed as a tapered surface that gradually widens toward the opening of the tip. Further, the caulking portion 3 is provided with a projection 3c on the inner wall surface 3b of the cylindrical body 3a. The protrusion 3c is continuously formed along the central axis C4 by rubbing the inner wall surface 3b that gradually widens toward the opening of the tip of the cylindrical body 3a. At least one projection 3c is provided. In addition, when there are a plurality of protrusions 3c (two in the present embodiment), the protrusions 3c are provided at equal intervals around the central axis C4. Further, in the case where there are a plurality of protrusions 3c, it is preferable that the protrusions 3c are provided to face each other based on the central axis C4. In the present embodiment, the protrusion 3c is inserted into the fitting groove 11d formed in the head 11a of the bolt 11, and the number thereof is within the number of the fitting grooves 11d, and the arrangement thereof is fitting. It is set according to the arrangement of the grooves 11d. The caulking part 3 configured as described above is configured so that the cylinder 3a is in a state where the bolt 11 is tightened with respect to the upper lid 51 as a fixed part while the head 11a is housed in the cylinder 12a of the lock member 12. It arrange | positions so that the locking member 12 may be surrounded. Then, the caulking portion 3 moves along the central axis C <b> 4, so that the projection 3 c pushes the cylindrical portion 12 a of the lock member 12 around the head portion 11 a of the bolt 11. In the present embodiment, the caulking portion 3 moves along the central axis C4 so that the projection 3c pushes the cylindrical portion 12a of the lock member 12 into the fitting groove 11d of the head portion 11a of the bolt 11.

  The main body portion 4 is formed in a long shape along the central axis C4 that is the tightening direction of the bolt 11 described above, and the above-described caulking portion 3 is provided at the tip thereof. Further, the main body portion 4 is provided with a through hole 4a penetrating into the cylindrical body 3a of the caulking portion 3 on the distal end side thereof. The through hole 4 a is formed on the central axis C <b> 4 and is inserted through the tightening portion 2 described above, and the hole shape matches the cross-sectional shape of the tightening portion 2. That is, when the tightening portion 2 is inserted into the through hole 4a, the fitting convex portion 2a at the tip is inserted into the tip of the cylindrical body 3a of the caulking portion 3 as shown in FIGS. 6-1 and 6-2. It is provided so as to be movable along the central axis C4 so as to appear in and out from the inside. Moreover, since the tightening portion 2 is inserted into the through-hole 4a, the cross-sectional shape thereof meshes with the hole shape of the through-hole 4a, so that the main body portion 4 and the caulking portion 3 are rotated around the central axis C4. Is restricted from rotating. Thus, in the state where the tightening portion 2 is restricted from rotating around the central axis C4 relative to the main body portion 4 and the caulking portion 3, the fitting convex portion 2a of the tightening portion 2 is When fitted into the fitting recess 11 c, the protrusion 3 c of the caulking portion 3 is disposed at a position facing the fitting groove 11 d of the bolt 11. As another configuration for restricting the rotation of the tightening portion 2 around the central axis C4, although not clearly shown in the drawing, the groove (or hole) along the central axis C4 and the groove (or hole) are inserted. The rotation of the tightening portion 2 around the central axis C4 may be restricted while guiding the movement of the tightening portion 2 along the central axis C4.

  Moreover, the hollow part 4b is formed in the main-body part 4 in the inside. The hollow portion 4b has a larger diameter than the through hole 4a and is formed along the central axis C4. The hollow portion 4b is provided at the base end of the main body portion 4 with the through hole 4a communicating therewith. For this reason, as for the clamping part 2 inserted in the through-hole 4a, the base end side is arrange | positioned in the hollow part 4b. Here, the fastening portion 2 is provided with a flange 2b at a portion disposed in the hollow portion 4b. The flange 2b does not hinder the movement of the tightening part 2 along the central axis C4, and the through hole 4a abuts on the stepped part 4c communicating with the hollow part 4b, so that the tightening part 2 is connected to the front end side from the through hole 4a. Regulate the situation of falling out.

  Further, the main body portion 4 is provided with a striking portion 4d at the base end thereof. The striking portion 4d is detachably provided to the base end of the main body portion 4 by screwing or the like, and is disposed so as to cover the base end and closes the open portion of the hollow portion 4b. Since the striking part 4d is detachable from the main body part 4, it is possible to assemble the fastening part 2 and an elastic member described later from the open part of the hollow part 4b.

  The holding means 5 holds the tightening portion 2 in a state where the fitting convex portion 2 a of the tightening portion 2 protrudes outside the cylindrical body 3 a of the caulking portion 3. The holding means 5 is made of an elastic member (compression coil spring in the present embodiment), and in the hollow portion 4 b of the main body portion 4, the flange 2 c provided on the proximal end side of the tightening portion 2, It arrange | positions between the parts 4d. For this reason, the elastic member as the holding means 5 biases the tightening portion 2 with elastic force in a state where the fitting convex portion 2a of the tightening portion 2 protrudes outside the cylindrical body 3a of the caulking portion 3. . The elastic member may be other than the compression coil spring as long as the tightening portion 2 is urged by an elastic force.

  FIG. 7 is a side sectional view of another example of a locking bolt tightening and caulking tool according to the present embodiment. The clamping caulking tool 1 shown in FIG. 7 is different in holding means 5. The holding means 5 here is configured as an operation hole in which the hollow portion 4 b is penetrated at the side portion of the main body portion 4 in place of the elastic member described above. That is, in the holding means 5 shown in FIG. 7, the fitting convex portion 2 a of the tightening portion 2 protrudes outside the cylindrical body 3 a of the caulking portion 3 by inserting a finger through the operation hole and grasping the tightening portion 2. In this state, the fastening part 2 is held.

  FIGS. 8-1 and FIGS. 8-2 are sectional side views of the usage state of the locking bolt tightening caulking tool according to the present embodiment. The tightening and caulking operations of the lock bolt 10 are performed by the above-described tightening and caulking tool 1. First, as shown in FIG. 8A, the fastening unit 2 is held by the holding means 5 in a state where the fitting convex part 2 a of the fastening part 2 protrudes outside the cylindrical body 3 a of the caulking part 3. . Next, the fitting convex part 2a is fitted into the fitting concave part 11c of the bolt 11, and the main body part 4 is rotated. Thereby, the volt | bolt 11 is fastened by the upper cover 51 as a to-be-fixed part. Thereafter, as shown in FIG. 8B, the main body portion 4 so that the cylindrical body 3 a of the caulking portion 3 surrounds the lock member 12 while the fitting convex portion 2 a is fitted in the fitting concave portion 11 c of the bolt 11. Is moved along the central axis C4. Then, by striking the striking portion 4d with a hammer (not shown) or the like, the caulking portion 3 moves along the central axis C4, and the protrusion 3c is inserted into the fitting groove 11d of the head 11a of the bolt 11 to the locking member 12. The cylindrical portion 12a is pushed in.

  In this way, the lock bolt clamping caulking tool 1 of the present embodiment is fitted to the fixed portion (upper lid 51), the bolt 11 to be fixed to the fixed portion, and the head of the bolt 11 while being fitted to the fixed portion side. A lock bolt tightening caulking tool 1 for tightening a bolt 11 and caulking the lock member 12, which is related to a lock bolt 10 having a lock member 12 caulked around 11 a, The fastening portion 2 having a fitting convex portion 2a fitted to the fitting concave portion 11c on the end surface of 11a, and the inner wall surface 3b of the cylindrical body 3a surrounding the head portion 11a of the bolt 11 and the lock member 12, The caulking portion 3 provided with a protrusion 3c that pushes a part of the lock member 12 around the head 11a of the bolt 11 as the bolt 11 moves in the tightening direction and the tip of the tightening portion 2 are fitted. The fitting projection 2a at the tip is disposed in the cylindrical body 3a while restricting the rotation of the clamping part 2 with the clamping direction of the bolt 11 being the central axis C4. And a main body part 4 provided with a fastening part 2 movably provided along a central axis C4 in a manner that appears and disappears. In addition, even if this lock bolt tightening caulking tool 1 is the bolt 11 in which the head 11a does not have the fitting groove 11d, a part of the lock member 12 can be caulked around the head 11a of the bolt 11. It can be done.

  According to this locking bolt clamping caulking tool 1, the bolt 11 is fixed by fitting the fitting convex portion 2a of the tightening portion 2 into the fitting concave portion 11c of the bolt 11 and rotating the main body portion 4. It is fastened to the upper lid 51 as a part. Thereafter, the main body 4 is moved along the central axis C4 so that the lock member 12 is surrounded by the cylindrical body 3a of the caulking portion 3 while the fitting convex portion 2a is fitted in the fitting concave portion 11c of the bolt 11. By doing so, the protrusion 3 c pushes the cylindrical portion 12 a of the lock member 12 around the head portion 11 a of the bolt 11. For this reason, it is possible to perform a tightening operation for tightening the bolt 11 to the fixed portion and a caulking operation for caulking the lock member 12 and pushing it around the head 11 a of the bolt 11. As a result, work time for fixing the lock bolt 10 is shortened, so that workability can be improved. In particular, in an environment where there is a risk of being exposed to radiation at a high temperature, it is desired to shorten the work time and improve workability, and this effect can be obtained remarkably.

  Further, the lock bolt clamping caulking tool 1 of the present embodiment has the clamping portion 2 in a state where the fitting convex portion 2a at the tip of the clamping portion 2 protrudes outside the cylindrical body 3a of the caulking portion 3. Holding means 5 is provided.

  According to the lock bolt tightening caulking tool 1, when the bolt 11 is tightened, the fitting convex portion 2 a of the tightening portion 2 is held in a state of being fitted to the fitting concave portion 11 c of the bolt 11. Therefore, the tightening operation can be easily performed. Further, during the caulking operation in which the lock member 12 is caulked and pushed around the head 11 a of the bolt 11, the fitting convex portion 2 a of the tightening portion 2 is held in a state of being fitted to the fitting concave portion 11 c of the bolt 11. Thus, since the movement of the caulking portion 3 is guided by the tightening portion 2, the caulking work can be easily performed.

  Further, in the lock bolt clamping caulking tool 1 of the present embodiment, the holding means 5 is formed of an elastic member that is disposed on the main body portion 4 and urges the clamping portion 2 with an elastic force.

  According to this locking bolt clamping caulking tool 1, the fitting convex portion 2a of the clamping portion 2 is fitted to the fitting concave portion 11c of the bolt 11 only by pressing the main body portion 4 in the direction of the bolt 11. Therefore, the holding operation is easy, which is useful for improving workability.

  Further, in the lock bolt clamping caulking tool 1 of the present embodiment, a fitting groove 11d is provided around the bolt 11, and the fitting convex portion 2a of the tightening portion 2 and the fitting concave portion 11c of the bolt 11 are provided. In the fitted state, the positions of the fitting groove 11d and the protrusion 3c of the caulking portion 3 are matched.

  The lock bolt 10 can firmly prevent rotation of the bolt 11 by caulking a part of the lock member 12 into the fitting groove 11d provided around the bolt 11 by the projection 3c. And according to this lock bolt tightening caulking tool 1, the fitting groove 11d and the projection 3c are formed by fitting the fitting convex part 2a of the tightening part 2 and the fitting concave part 11c of the bolt 11. Since it is positioned, it is useful for improving workability.

  Further, the lock bolt clamping caulking tool 1 of the present embodiment is provided with a plurality of sets of fitting grooves 11d and protrusions 3c.

  According to the lock bolt tightening caulking tool 1, it is possible to firmly prevent the bolt 11 from rotating by caulking and pushing a part of the lock member 12 at a plurality of locations.

  Further, in the lock bolt tightening and caulking tool 1 of the present embodiment, a plurality of fitting grooves 11d are provided at opposing positions around the bolt 11, and the projection 3c corresponds to the fitting groove 11d and the cylindrical body 3a. A plurality of the counter positions are provided.

  According to the lock bolt tightening caulking tool 1, it is possible to firmly prevent the bolt 11 from rotating by caulking and pushing a part of the lock member 12 at the facing position.

DESCRIPTION OF SYMBOLS 1 Clamping tool 2 Clamping part 2a Fitting convex part 2b Flange 2c Flange 3 Caulking part 3a Cylindrical body 3b Inner wall surface 3c Protrusion 4 Body part 4a Through-hole 4b Hollow part 4c Step part 4d Impacting part 5 Holding means 10 Lock bolt 11 bolt 11a head 11b male threaded portion 11c fitting recess 11d fitting groove 12 lock member 12a tube portion 12b through hole 12c flange portion 12d notch groove 13 holding member 13a fixing piece 13b abutting piece 13c protrusion 13d through hole 51 upper lid (Fixed part)
52 Structure 53 Shim Plate C1, C2, C3, C4 Center axis

Claims (6)

The present invention relates to a lock bolt having a bolt to be fastened to a fixed portion and a lock member to be caulked around the head of the bolt, and tightening the bolt and caulking the lock member. A caulking tool,
A tightening portion having a fitting convex portion at the tip thereof to be fitted to the fitting concave portion of the head end face of the bolt;
On the inner wall surface of the cylinder surrounding the bolt head and the lock member, there is provided a protrusion for pushing a part of the lock member around the bolt head as the bolt moves in the tightening direction. Takashime Department,
The fitting convex portion is disposed in the cylinder of the caulking portion, and the fitting convex portion is configured to restrict the rotation of the tightening portion with the bolt tightening direction as a central axis. A main body provided to be movable along the central axis in a manner that appears and disappears from the outside of the body;
A tightening caulking tool for a rock bolt, comprising:   The lock according to claim 1, further comprising holding means for holding the tightening portion in a state in which a fitting convex portion at a tip of the tightening portion protrudes outside the cylindrical body of the caulking portion. Tightening caulking tool for bolts.   3. The lock bolt tightening and caulking tool according to claim 2, wherein the holding means is formed of an elastic member that is disposed on the main body portion and biases the tightening portion with an elastic force.   A fitting groove is provided around the bolt, and the fitting groove and the projection of the caulking portion are positioned with the fitting convex portion of the tightening portion and the fitting concave portion of the bolt fitted. The locking caulking tool for a lock bolt according to any one of claims 1 to 3, wherein the tools are matched.   5. The lock bolt tightening caulking tool according to claim 4, wherein a plurality of sets of the fitting grooves and the protrusions are provided.   5. A plurality of the fitting grooves are provided at opposite positions around the bolt, and a plurality of the protrusions are provided at opposite positions of the cylinder corresponding to the fitting grooves. Locking and tightening tool for lock bolts described in 1.

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