JPH0236704Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a bolt tightening tool used for tightening structural material bolts that are fastened to thin plate-like structural members, such as the roofs of buildings.

(Prior art and issues to be solved) Conventionally, for example, bolts for structural materials for attaching thin plate-like structural members such as roofs to roof frames often require special tightening bolts, such as thin plate-like structures. An insert bolt that is inserted through a material, a cap nut that is screwed onto the outer end of the insert bolt, and a cap nut that is screwed into the insert bolt inside the structural material and that screws when the cap nut is rotated. A bolt for a structural material is used, which is composed of a tightening fitting that is bent and deformed into an expanded shape when the bolt is bent, and a washer or the like interposed between the structural member and the cap nut so as to prevent the tightening fitting from rotating. Ta.

When tightening this structural material bolt, the member to be tightened by the tightening tool (for example,
Due to the special nature of the relationship between cap nuts, insert bolts, washers, etc., it is difficult to use existing bolt tightening tools operated by drive motors, and workers are currently relying on their own powered hand tools. It was hot.

Therefore, the present invention allows the tightening bit assembled into the bolt tightening tool to be easily replaced in accordance with the dimensions of the bolt for structural material, and also simplifies the work of tightening the special bolt for structural material mentioned above. The object of the present invention is to provide a bolt tightening tool that can improve its workability.

(Means for Solving the Problem) In order to achieve the above-mentioned object, the present invention includes an insert bolt that is inserted through a plurality of polymerized thin plate-like structural members, and a bolt that is screwed into the outer end of the insert bolt. a cap nut that is screwed into the insert bolt inside the structural member, and is screwed and bent into an expanded shape when the cap nut is rotated; the structural member and the bag; A fastener for fastening a bolt for a structural member to the structural member, the bolt being comprised of a washer or the like having at least an angular peak, which is interposed between the nuts so as to prevent the tightening member from rotating; A spindle is rotatably supported to be movable in the axial direction and has a fixed clutch rotatably positioned in the housing and a disengageable driven clutch. A socket bit with a recessed fitting portion is removably engaged, and the housing is provided with a cylindrical stopper with a protruding piece at the tip, so that the front guide can be moved in the axial direction with respect to the socket bit. An engaging piece is fitted on the rear end of the front guide to freely engage with the projecting piece of the stopper to restrict the front guide from rotating when the socket bit is rotated. Along with protruding,
The tip part has a front fitting part in the back part for fitting the square peak of the washer to restrict the rotation of the washer when the cap nut is fitted in the back fitting part. The gist is that it is formed continuously with the fitting part.

(Function) An insert bolt constituting a structural material bolt is inserted into a plurality of laminated thin plate-like structural members, and a washer or the like having at least a square-shaped crest on the outer end of the insert bolt is attached to a cap nut. are screwed in order, and the tightening fitting, which is prevented from rotating by the washer or the like, is screwed into the insert bolt inside the structural member, and the socket bit is removably engaged with the spindle. The cap nut of the structural bolt is fitted into the socket bit, and at the same time, the rectangular ridge part of the washer or the like is fitted into the front fitting part of the front guide externally fitted onto the socket bit. Then, while the front guide prevents the rotation of the tightening fitting together with the washer, etc., the socket bit rotates the insert bolt together with the cap nut to apply a moving force to the tightening fitting in the spiral direction, and the tightening is performed. The metal fittings are bent and deformed in an expanded shape, and the plurality of superposed thin plate-like structural members can be tightened by the expanded bending deformation of the tightening metal fittings and the cap nut.

(Example) First, a structural material bolt V for fastening to a thin plate-like structural material will be explained according to FIGS. 1 and 2. In the figure, 1 indicates a frame K1 and a folded plate K.
2 is an insert bolt that is inserted through the structural material K which is overlapped inside and outside, and 2 is a threaded portion 2a at the lower end that is screwed into the insert bolt 1 inside the structural material K, and when it is compressed, it bends and deforms to form a flat surface. The deformed part 2 is vertically divided into four parts so that it is expanded into a roughly ten-shaped shape.
3 is a packing for sealing, 4 is a mountain washer 4A that is attached to the outer surface of the structural material and has a protruding square tubular peak 4a, and the upper end of the tightening metal 2. An inner washer 4B is fitted into the crest 4a of the crest washer 4A in order to restrict the rotation of the tightening fitting 2 by locking the inner washer 4B.
The washer 5 is a cap nut that is screwed into the outer end of the insert bolt 1 so that it can rotate together with the washer 4. When the insert bolt 1 is turned, the threaded portion 2a of the fastening fitting 2 is threaded, the deformed portion 2b is bent and deformed, and the structural member K can be tightened between the cap nut 5 and the fastening fitting 2. can.

Next, the bolt fastener will be explained according to FIGS. 2 to 5. In the figure, 10 is a housing of the fastener main body H, and 11 is a bolt that is rotatably supported perpendicularly to the inside of the housing 10. The clutch gear is fitted onto the drive shaft 12 and rotates steadily by meshing with a pinion 13 which is rotationally driven by a motor (not shown), and has a tooth-shaped fixed clutch 11a formed at its lower end.

Reference numeral 14 denotes a spindle which is rotatably supported below the clutch gear 11 in the housing 10 so as to be movable in the vertical direction, and near its lower end is a rectangular hole-shaped (hexagonal hole in this example) fitting part 14a. is vertically recessed, while a driven clutch 14b, which is disposed opposite to the fixed clutch 11a in order to engage with the fixed clutch 11a, is provided at the upper end loosely fitted to the lower end of the drive shaft 12.
are formed so that they can engage with each other, and are normally urged downward by a spring 15 interposed between the gear 11 and the spindle 14. When the housing 10 is moved downward with the spindle 14 fixed, the fixed clutch 11a and The driven clutch 14b is engaged and the rotation of the clutch gear 11 is transmitted to the spindle 14. On the other hand, when the housing 10 is moved upward, the fixed clutch 11a and the driven clutch 14b are disengaged by the elastic force of the spring 15, and the rotation of the spindle 14 is prevented. will be stopped.

A locking ball 16 is fitted into a horizontal hole 14c drilled near the lower end of the spindle 14, and is normally urged inward by a ring-shaped spring 17 wound around the spindle 14. The tip is the insertion part 1
It protrudes slightly into 4a.

Reference numeral 18 denotes a substantially cylindrical stopper screwed onto a threaded portion 10a formed at the lower end of the housing 10, and the lower end thereof has two opposing protrusions 18a,
18a are spaced apart and protrudingly provided.

Reference numeral 19 denotes a socket bit which is removably attached to the spindle 14, and has a deep fitting part 19a formed in a hexagonal hole shape at the lower end thereof in order to fit the cap nut 5 so as to be rotatable therewith. A hexagonal rod-shaped insertion portion 19b is recessed and extends upward to be inserted into the insertion portion 14a of the spindle 14.
An engaging groove 20 is provided in a circumferential manner facing the locking ball 16 of the spindle 14, and when the insertion portion 19b is inserted into the fitting portion 14a of the spindle 14, the locking ball 16 is recessed in the engaging groove 20. While the socket bit 19 is secured to the spindle 14 by elastic engagement within the
The insertion portion 19b can be forcibly pulled out from the insertion portion 14a against the locking force of the locking ball 16.

Reference numeral 21 denotes a substantially cylindrical front guide fitted externally to the socket bit 19 so that it can freely rotate and move together in the vertical direction, and has a stopper 1 at its upper end.
The front guide 21 is engaged between the protrusions 18a of the socket 8 so as to allow the front guide 21 to swing within a predetermined range and move in the vertical direction, thereby restricting the front guide 21 from rotating when the socket bit 19 rotates. Therefore, the engaging pieces 21a, 21a opposed to both protruding pieces 18a of the stopper 18 are protruded in opposite directions,
A lower end portion protruding from the lower end surface of the socket bit 19 is provided with a rectangular hole-shaped front fitting portion 21b into which the peak portion 4a of the washer 4 is fitted so as to restrict its rotation. The socket bit 19 is held between the upper edge of the first fitting part 21b and a locking ring 22 fitted to the inner surface of the front guide 21 to slidably support the front guide 21. The inner fitting part 19a of the front guide 21 and the front fitting part 21b of the front guide 21 are arranged so as to properly fit the cap nut 5 and the peak part 4a of the washer 4, respectively.
The housing 10 is placed on the structural member K side with the cap nut 5 fitted in the inner fitting part 19a and the crest 4a of the washer 4 fitted in the front fitting part 21b. When the locking clutch 11a is pushed to the position shown in FIG. and the structural member bolt V can be tightened to the structural member K.

Next, the operation and effects of the embodiment having the above configuration will be explained.

Now, in this example, the cap nut 5 of the structural material bolt V
A socket bit 19 with a deep fitting part 19a for co-rotatingly fitting is removably attached to the spindle 14, so it is compatible with various cap nuts with different sizes and shapes. The socket bit 19 can be easily replaced, and a front guide 21 having a front fitting part 21b connected to the inner fitting part 19a for fitting the peak part 4a of the washer 4 can be slid and inserted into the socket bit 19. Since the front guide 21 is fitted externally so that they can move together and is configured such that the rotation of the front guide 21 is restricted by the stopper 18 when the socket bit 19 rotates, the cap nut 5 and the ridge 4a of the washer 4 are pushed back. The cap nut 5 can be rotated with the fitting part 19a and the tip fitting part 21b properly fitted and the rotation of the washer 4 reliably regulated, and the structural bolt V can be attached to the structural member K. However, it has the advantage of being able to securely fasten.

Further, since both the engaging pieces 21a of the front guide 21 are movably engaged between the protruding pieces 18a of the stopper 18, the inner fitting part 19a and the front fitting part 2
1b and the mountain portion 4a of the cap nut 5 and washer 4, respectively.
When inserting the front guide 21, the front guide 21 can be rotated and aligned easily.

(Effects) As described above, in the present invention, the cap nut constituting the bolt for structural material is fitted into the deep fitting part of the socket bit removably attached to the spindle, and together with this, the cap nut constituting the bolt for structural material is The structure is constructed by simply fitting a washer or the like having a rectangular crest, which constitutes the material bolt, into the front fitting part of the front guide externally fitted to the socket bit and driving the rotation of the spindle. Bolts for structural materials can be tightened, and the work of tightening even special bolts for structural materials can be simplified, and workability can be improved.

Moreover, since the socket bit is removably attached to the spindle and the front guide is fitted externally to the socket bit, it can be formed to correspond to the cap nuts or washers of bolts for various structural materials with different sizes and shapes. This has the advantage that the socket bit or front guide can be easily replaced.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is an exploded perspective view of a structural bolt, and Fig. 2 is a vertical sectional view of the main parts of the structural bolt and bolt fastener before tightening. 3 is a longitudinal sectional view of the bolt tightening tool in use, FIG. 4 is a sectional view taken along the line X--X of FIG. 2, and FIG. 5 is a perspective view of the socket bit and front guide. 1...Insert bolt, 2...Tightening fitting, 4
... Washer, 5 ... Cap nut, 10 ... Housing, 11a ... Fixed clutch, 14 ... Spindle, 14b ... Driven clutch, 18 ... Stopper, 19 ... Socket bit, 19a ... Inner fitting part, 21...Front guide, 21a...Engaging piece, 21b...Front fitting part, K...Structural material, V...
Bolts for structural materials.

Claims (1)

[Scope of utility model registration request] an insert bolt that is inserted through a plurality of laminated thin plate-like structural members; a cap nut that is screwed onto the outer end of the insert bolt; and a cap nut that is screwed into the insert bolt inside the structural member and the bag. a fastening metal fitting that is spirally advanced and bent into an expanded shape when the nut is rotated; A fastener for fastening a bolt for a structural member made of a washer or the like having a crest to the structural member, the fixed clutch being rotatably placed in the housing and the driven clutch being disengageable. A spindle is removably supported so as to be movable in the axial direction, and a socket bit having a recessed deep fitting portion into which the cap nut fits is removably engaged with the spindle, and a socket bit with a recess into which the cap nut fits is removably engaged with the housing. A cylindrical stopper with a protruding piece at the tip is provided, and a front guide is externally fitted to the socket bit so as to be movable in the axial direction. An engaging piece is provided in a protruding manner to engage freely and to restrict the front guide from rotating when the socket bit is rotated, and the cap nut fits into the inner fitting part at the tip end. The bolt tightening method is characterized in that a front fitting part is formed continuously with the inner fitting part to fit the rectangular peak part of the washer and restrict the rotation of the washer when the washer is pressed. Fittings.