JP2858150B2 - Split nut - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a split nut which is inseparably screwed to a bolt or a screw rod.

[Conventional technology]

Conventionally, various types of split nuts composed of a pair of half nut pieces have been developed, but as a means of screwing these half nut pieces to a bolt body or a screw rod in a state where these half nut pieces are joined, For example, as disclosed in Japanese Examined Utility Model Publication No. 50-37489, the entire outer peripheral surfaces of the two half nut pieces are fitted with one cover body with the opposing surfaces of the two half nut pieces joined together. In this way, a bolt body or a screw rod can be held in a threaded state, or a British patent No. 855,03
As disclosed in the specification of Japanese Patent No. 7, the one side portion of the half nut piece is rotatably pivotally connected to each other, and the other side portion opposing surfaces are provided with ear portions which can be joined to each other so as to protrude. There is known a configuration in which a pin is inserted between holes provided in the nut to form a form similar to a normal nut.

[Problems to be solved by the invention]

However, according to the former split nut, the number of parts used is increased because the cover body is separately required, so that not only is it expensive, but also it is possible to combine the two half nut pieces together and screw them into the bolt body or the like. Since the cover has to be fitted, the mounting operation is troublesome and time-consuming, and furthermore, a means for fixing the split nut so that the cover is not detached is required. Further, for a screw rod whose both ends are fixed to a wall surface or the like, both half nut pieces can be disposed so as to be sandwiched from both sides of the screw rod, but the cover body is inserted through the screw rod in advance. Otherwise, mounting is impossible, and therefore, there is a problem that mounting to an existing screw rod cannot be performed.

On the other hand, according to the latter split nut, such a problem can be almost completely solved. However, depending on the mounting state of the hinge connecting one side portion of the two half nut pieces, the two half nut pieces are oriented in the axial direction. If there is any misalignment in the torsion direction, there is a risk that the screwing to the bolt body or screw rod will be poor, and furthermore, the two half nut pieces will be joined to the other side facing surfaces Since the ears are protruded and the pins are inserted between the holes in both ears, the pins are inserted into each other, so if there is any gap between the pin hole and the pin, rattling will occur. Thus, there is a problem that a good screwing cannot be obtained, and if the pin is lost, it cannot be used.

Further, since the conventional split nuts described above are all detachably screwed to the bolt body or the screw rod, there is a possibility that the attaching / detaching means may come off unexpectedly due to vibration or other external force. Was.

An object of the present invention is to provide a split nut which can completely solve such a problem and can be fitted to an existing screw rod or the like by one-touch and mounted in a killed state.

[Means for solving the problem]

In order to achieve the above object, the split nut of the present invention is
A split nut in which the outer ends of the opposing split surfaces of a pair of half nut pieces are integrally connected with a bendable band-shaped connecting piece,
On one of the split surfaces of the half-nut nut, a locking protrusion is provided so as to sandwich a semi-circular screw hole provided in the half-nut nut, and the engaging protrusion is formed on the split surface of the other half-nut nut. A groove for inserting the stopper piece, and a locking step for locking the locking claw protruding from both outer surfaces of the distal end of the locking piece to form a locking state are formed. The locking end surface of the locking claw is formed as an inclined surface that is inclined obliquely rearward toward the tip, and the locking protrusion is divided into two divided protrusions each having the locking claw at each end. The spacer member is interposed in the slit formed between the divided surfaces of the divided projecting pieces.

In such a split nut, the strip-shaped connecting piece connecting the two half nut pieces is formed by thinning a portion near one half of the half nut on which the locking protrusion is provided from the center in the length direction. It is desirable to be formed at the bent portion.

[Action]

According to the split nut configured as described above, for example,
When mounting on stud bolts whose both ends are fixed to a wall or the like, grasp the outer peripheral surfaces of both half nuts connected with the strip-shaped connecting piece with thumb and forefinger, etc. When the two half nut pieces are pressed in the direction of approaching each other while inserting the locking projection of one half nut piece into the groove of the other half nut piece, When the opposing divided surfaces of the nut pieces are joined and the two half nut pieces are completely screwed into the stud bolts, the locking hook at the tip of the locking projection of one half nut piece has a groove in the other half nut piece. It is elastically locked to the locking step provided at the deep portion, and the two half nut pieces are inseparably integrated and have the same appearance and function as a normal nut.

In this state, when the split nut is tightened, the tapered surface of the screw hole of the split nut is pressed against the tapered surface of the screw thread of the bolt, and the acting force for separating the two half nut pieces through the pressed surface. However, the locking end face of the locking claw of one half nut piece that locks to the locking step of the other half nut piece is formed as an inclined surface that is inclined obliquely rearward toward the tip. Accordingly, the locking claw is deformed in the direction in which it is more likely to bite into the locking step by the action force, and the separation of the two half nut pieces is strongly prevented.

Also, since the locking projection is divided into two parts from the center of the distal end and formed into divided projections having a locking claw at each distal end,
If an appropriate spacer member is interposed in the slit formed between the divided surfaces of these divided protruding pieces, the locking claw can be securely locked to the locking stepped portion regardless of the above-mentioned acting force at the time of screwing. It can be kept in the state where it was.

In the band-shaped connecting piece connecting the two half nut pieces, a portion closer to one half of the half nut where the locking projection is provided from the center in the length direction is formed in a thin bent portion. By doing so, both half nut pieces can be bent by one-touch in the direction in which the divided surfaces are joined together from the thin bent portion by the pinching force of the fingertip that picks these half nut pieces, and the other half can be bent. The locking projection of one half of the nut nut is smoothly inserted into the groove of the split nut and the screwing operation with the bolt can be performed quickly.

〔Example〕

The embodiment of the present invention will be described with reference to the drawings. A split nut (1) is made of a hard synthetic resin, has a hexagonal outer shape, has a screw hole (2) in a central portion, and has a screw hole (2). The face including the center of (1) is divided into two half nut pieces (1A) and (1B) by using the surface including the center as a perching line.

These half nuts (1A) and (1B) are semicircular screw holes (2A) (2B) formed by dividing the screw hole (2) into two parts at the center of the opposing split surfaces (3) and (4). ) And two narrow strip-shaped connecting pieces (5) of the same length capable of refracting between the two opposing edges of the one of the divided surfaces (3) and (4).
They are integrally connected by (5).

(6) (6) is a locking projection having the same height protruding from a center portion of one of the half nut pieces (1A) on the opposite division surface (3) across the screw hole (2A) on the opposite division surface (3). The inner surface (61) on the screw hole (2A) side is formed as a surface perpendicular to the dividing surface (3), and the outer surface (62) is formed as a tapered surface forming one piece of a hexagon nut. Therefore, it has a triangular side surface that tapers from the dividing surface (3) toward the tip. Further, semi-arrow-shaped latches whose projecting height gradually increases from the tip toward the dividing surface (3) are provided on both outer surfaces of the distal ends of the locking projections (6) and (6). Claws (7) and (7) are protruded, and the locking end faces (8) of these locking claws (7) facing the dividing surface (3) side are the outer surfaces of the locking projections (6). From the top to the pointed end thereof, and is formed on an inclined surface inclined obliquely rearward toward the division surface (3).

Further, each of the locking projections (6) is provided with a straight slit (9) extending from the tip to the dividing surface (3) at the center thereof, and through each of the straight slits (9), the outside of each tip. Parallel split pieces (6A) having the locking claws (7) on the side surfaces
(6A), and the slit (9) allows the split protruding pieces (6A) (6A) to be elastically deformable in the approaching direction.

(10) (10) extends from the center of both sides of the other half nut piece (1B) across the screw hole (2B) on the opposing split surface (4) to both outer edge ridges of the split surface (4). A guide groove provided so as to penetrate an adjacent ridge, and the bottom of the groove is formed as a flat surface perpendicular to the dividing surface (4), and the groove (10) opening to the dividing surface (4). ) On both sides (10
a) The width of the opening between (10a) is made equal to or slightly larger than the width between both locking claws (7) and (7) of the locking protrusion (6), and the insertion of the locking protrusion (6) is performed. Can be easily performed.

Further, the length (depth) of the groove (10) is formed to be substantially equal to the dimension from the base end (division surface (3)) of the locking projection (6) to the tip of the locking claw (7), The distance between the side walls (10a) and (10a) is gradually narrowed toward the depth so that the distance between the innermost parts is approximately equal to the width between the both sides of the locking projection (6). In addition, the width of the groove extending from the innermost part of the groove (10) to the ridge is widened to form a locking claw insertion groove (11).
Locking step portions (12) and (12) of the locking claw (7) directed to both outer sides are formed in the continuous portion between (0) and (11).

As shown in FIG. 5, the locking step (12) has a groove (1).
0) and (11) may be formed on surfaces perpendicular to both side walls (10a) and (11a), and as shown in FIG. ) May be formed on the same inclined surface as the engaging end surface (8) or a gentle inclined engaging surface.

The width of the groove (10) may be the same as the width of the groove (10), which is inserted while pressing the locking claws (7) and (7) over the entire length.

(13) (13) is an arc-shaped recess provided in the center of the back surface of the half nut pieces (1A) (1B). When joining these half nut pieces (1A) (1B), The nut can be assembled while preventing the fingertip from slipping and securely engaging the fingertip.

The strip-shaped connecting piece (5) connecting the two half nut pieces (1A) and (1B) is not linear as shown in the figure,
Split surface (3) of these half nut pieces (1A) (1B)
(4) is desirably curved in an arc shape so as to face each other in an inclined state. Further, the strip-shaped connecting piece (5) has a locking protruding piece (6) from the center in the longitudinal direction. The portion near the one half nut piece (1A) side provided is formed in a thin bent portion (14).

Further, as shown in FIG. 7, an appropriate length having a thickness capable of being inserted into the slit (9) at the base end corner of the locking projection (6) of the one half nut piece (1A). The thin rod-shaped spacer (15) may be provided so as to be bent.

This spacer (15) is connected to the other half nut piece (1
The locking claw insertion groove (11) of (B) may be provided so as to protrude from the edge of the opening end.

Using the split nut configured as above, for example,
As shown in FIG. 8, when attaching a saddle (C) holding various pipes (P) to an intermediate portion of an existing stud bolt (B) having upper and lower ends fixed to a wall (W) or the like, use a fingertip. Grip the outer ridges of both half nut pieces (1A) and (1B) by gripping them.
(1B) is located outside the both sides of the stud bolt (B) at the desired mounting position of the saddle (C) so as to sandwich the stud bolt (B), and then these half nut pieces (1A) are placed. ) When (1B) is pressed in the direction approaching each other, the split surfaces (3) and (4) of both half nut pieces (1A) and (1B) face each other due to the bending of the band-like connecting piece (5), and one half Nut piece (1A) locking protrusion (6) (6)
Is the guide groove (10) (10) of the other half nut piece (1B)
Insert inside.

At this time, the band-like connecting piece (5) is formed by thinning the portion near the one half nut piece (1A) side where the locking projection piece (6) is provided from the center in the longitudinal direction thereof to the thin-walled bent portion (14). The two half nut pieces (1A) and (1B) rotate in the direction of approaching each other around the thin bent portion (14), and one half nut piece (1A) The surface (3) rotates while being pulled slightly toward the connecting piece (5) with respect to the other half nut piece (1B), and accordingly, the split face (3) of one half nut piece (1A). The hooks (7) and (7) at the tip end of the locking projection (6) projecting from the inside (the coupling piece (5) side)
The other half nut piece (1B) is smoothly inserted into the guide groove (10) of the half nut piece (1B) without coming into contact with the divided surface (4).

Further, since the opening end side of the guide groove (10) is formed slightly wider, the locking claws (7) and (7) are easily fitted into the guide groove (10), and both side walls of the guide groove (10) gradually become narrower. (10a) The sliding projections (6A) of the locking projection (6) slidingly contacting the (10a) and the locking projections (6A) (6A) elastically shrink in the direction approaching each other via the slit (9). 7) (7) is inserted into the guide groove (10).

As described above, when the locking claws (7) and (7) penetrate the guide groove (10), they reach the wide insertion groove (11) and divide the projecting pieces (6A) and (6A) or the locking claws (7) and (7). 7) is restored to the direction in which they are separated from each other by their elastic force, and
(7) Locks the locking nuts (12) and (12), and the two half nut pieces (1A) and (1B) are connected to each other in a fitted state. The semicircular screw holes (2A) (2B) of the half nut pieces (1A) (1B) form a circular screw hole screwed into the stat bolt (B).

Thereafter, the saddle (C) is fixedly held at an arbitrary position of the stud bolt (B) by rotating the same as the conventional nut.

In this fixed state, both half nut pieces (1A) (1B)
Even if an external force is applied to separate the nut pieces from each other, the engaging force causes the locking claws (7) (7) projecting from one of the half nut pieces (1A) to be inclined. The other half nut piece (1B) is locked through the tongue face (8) in the direction of further biting into the locking step (12), and these half nut pieces (1A) (1B) are always strong. This is to maintain integration.

In addition, a thin rod-shaped spacer (15) of an appropriate length is protruded from one of the half nut pieces so as to be freely bent, and after engaging the two half nut pieces (1A) (1B), the locking projection is formed. The spacer (15) is inserted into the slit (9) between the divided protruding pieces (6A) and (6A) of the piece (6).
, A more stable integration can be achieved.

〔The invention's effect〕

As described above, according to the split nut of the present invention, the split nut in which the outer ends of the opposing split surfaces of the pair of split nut pieces are integrally connected by a bendable band-shaped connecting piece, On the divided surface of the split nut piece, a locking projection is projected so as to sandwich the semicircular screw hole provided in the half nut piece, and the locking projection is formed on the split surface of the other half nut piece. And a locking step for locking the locking claws protruding from the outer surfaces of both ends of the locking projection into a locked state. Further, the locking with respect to the locking step is performed. Since the locking end surface of the claw is formed on an inclined surface that is inclined obliquely rearward toward the tip, the two half-nut nuts are integrally connected by a band-like connecting piece. Easy to handle as a set of divided nuts and when screwing into bolts or screw rods Are those capable of performing efficiently mounting operation in a state where the two half nut pieces were clamped with a fingertip.

Further, when a clamping force is applied to the two half nut pieces in the direction of approaching each other at the time of this mounting work, these half nut pieces can be rotated in the accurate fitting direction around the band-shaped connecting piece. Then, the fitting protrusion protruding from one half of the nut piece is accurately fitted with a one-touch operation into the groove provided on the opposing divided surface of the other half nut piece, and the tip locking claw of the locking protrusion is locked. Part.

In this way, the two half nut pieces can be connected and fixed to form one nut body, and another connecting tool such as a cover body or a connecting pin is separately used like a conventional split nut. Since there is no necessity, not only the connection operation can be performed extremely easily, but also the semicircular screw holes of the two half nut pieces can be securely screwed to desired portions of the bolt body and the screw rod. In this state, the locking projection of one half nut piece is fitted into the groove of the other half nut piece, so the outer peripheral surface has the same shape as a normal nut body, and the wrench etc. Can be smoothly locked by being locked to the outer peripheral surface thereof to enable a rotating operation.

Furthermore, even if the external force such as the tightening force is large and a force is applied to separate the nut pieces from the two half nut pieces, the locking claw protruding from one of the half nut pieces. Is formed on an inclined surface which is inclined obliquely rearward toward the pointed end, so that the locking claw is locked in a direction in which the locking claw further bites into the locking step surface of the other half nut piece by its acting force. In addition, the locking protruding piece is divided into two pieces, each of which has the locking claw at its tip, and a spacer member is formed on a slit formed between the divided surfaces of these divided protruding pieces. Since the spacer is interposed, the interposition of this spacer member ensures that the tip locking claw of the divided protruding piece is locked to the locking step surface of the other half nut piece, and these Always keep the half nut pieces together in a tight fit Kill.

Also, with respect to a screw rod or the like provided in a narrow space with both ends fixed to a wall surface or the like, after positioning the pair of half nut pieces on both outer sides thereof, The two half nut pieces can be easily connected to each other so as to be sandwiched between them, and workability is remarkably improved.

[Brief description of the drawings]

1 is a perspective view, FIG. 2 is a vertical side view, FIG. 3 is a plan view, and FIG. 4 is a state in which both half nut pieces are joined together. FIG. 5 is a side view, FIG. 5 is a plan view thereof, FIG. 6 and FIG.
The figure is a front view showing an example of use. (1) Split nut, (1A) (1B) Half nut piece, (2A) (2B) Screw hole, (3) (4) Opposing split surface, (5) Strip-shaped connecting piece, (6) ... locking projection,
(6A) (6A)… split piece, (7)… locking pawl, (8)
… Locking end face, (9)… Slit, (10)… Groove,
(12) ... locking step surface, (14) ... thin-walled bent portion.

Claims (2)

(57) [Claims] 1. A split nut in which outer ends of opposed split surfaces of a pair of half nut pieces are integrally connected with a bendable strip-shaped connecting piece, wherein a split face of one half nut piece is A groove for projecting a locking projection across the semicircular screw hole provided in the half nut piece, and inserting the locking projection into a split surface of the other half nut piece; And a locking step for engaging and locking the locking claws protruding from both outer surfaces of the distal end of the stopper piece to form a locking state. Further, the locking end face of the locking claw with respect to this locking step is sharpened. The locking projection is formed into an inclined surface that is inclined obliquely rearward as it goes, and the locking projection is divided into two divided projections each having the locking claw at each end. A split nut, wherein a spacer member is interposed in a formed slit. 2. A band-shaped connecting piece connecting said two half nut pieces is formed by thinning a portion of one half of the nut near one side where a locking projection is provided from the center in the longitudinal direction. The split nut according to claim 1, wherein the split nut is formed in the split nut.