JPH05180210A - Divided nut - Google Patents

Abstract

PURPOSE:To hold two half-nut pieces together as a unit so that they cannot be separated by holding both faces of engaging-locking block pieces provided on the other half nut piece with holding-projected parts provided on one half nut piece, and by a quick operation of simply pressing both the half nut pieces in the direction in which they are brought close to each other. CONSTITUTION:When a divided nut 1 which presents a hexagonal appearance by joining half nut pieces 2, 3 which are made of synthetic resin molded parts, and on the middle of the divided faces of which semicircular tapped hole parts 4, 5 are respectively formed, is assembled, the respective half nut pieces 2, 3 are located outwardly on both sides of a stud bolt to which the half nut pieces are to be mounted. By pressing both the half nut pieces 2, 3 in the direction in which they are brought close to each other, holding projected parts 7, 7 provided on one half nut piece 2 hold both faces 10c, 10c of engaging- locking blocks 10 provided on the other half nut piece 3, and simultaneously, engaging-locking projected pieces 12, 12 provided on one half nut piece 2 are inserted and fitted into guide holes 15, 15 provided on the other half nut piece 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a split nut which is inseparably engaged with a bolt body or a screw rod.

[0002]

2. Description of the Related Art Conventionally, split nuts consisting of a pair of half-split nut pieces having various structures have been developed, but these half-split nut pieces are screwed to a bolt body or a threaded rod in a joined state. As an example of the means for making it
As disclosed in Japanese Patent Laid-Open No. 9-93, a bolt body or a bolt body is formed by fitting the entire outer peripheral surfaces of both half nut pieces with the facing surfaces of both half nut pieces joined together. There is a device that holds a screwed state with respect to a screw rod.

As another example of the above-mentioned screwing means, as disclosed in British Patent No. 855,037, one side portions of half nut pieces are pivotally attached to each other while being pivotally attached to each other. It is known that an ear portion that can be joined to the other side portion is protruded, and a pin is inserted between the holes provided in both the ear portions so as to have a form similar to a normal nut. There is.

[0004]

However, according to the former split nut, since the cover body is separately required, the number of parts to be used is increased and not only is it expensive, but also the bolts are formed by combining both half nut pieces. Since the cover body must be fitted while maintaining the state of being screwed to the body etc., the mounting work is troublesome and labor-intensive, and moreover, a means for fixing the cover body so as not to separate from the split nut. Will be required. Furthermore, for a threaded rod whose both ends are fixed to a wall surface, both half nut pieces can be arranged so as to be sandwiched from both sides of the threaded rod, but the cover body must be inserted in advance in the threaded rod. If it is not installed, there is a problem that it cannot be attached, and therefore it cannot be attached to an existing screw rod.

On the other hand, according to the latter split nut, most of the problems described above can be solved, but both half nut pieces are attached depending on the mounting state of the hinge connecting one side portions of both half nut pieces. If there is any deviation in the axial direction or in the twisting direction, there is a risk that the bolt body or the threaded rod will not be screwed properly. Since the ear portions that can be joined to each other are protruded and the pins are inserted between the holes provided in both the ear portions, they are combined so that if there is a slight gap between the pin holes, there will be backlash. Sticking occurs and good screwing cannot be obtained,
There is also a problem that if the pin is lost, it cannot be used.

Further, the conventional split nut as described above is
Since all of them are detachably screwed to the bolt body or the threaded rod, there is a possibility that the attaching / detaching means may accidentally come off due to vibration or other external force.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems entirely and to provide a split nut which can be fitted into an existing threaded rod or the like in a one-touch manner to be killed.

[0008]

In order to achieve the above object, the split nut of the present invention comprises a pair of half nut pieces, and a semicircular screw hole portion is formed at the center of the split surface of the half nut pieces. A pair of pinching members having locking pawls on the inner side of the tip end at both ends in the axial direction of the screw hole portion on the split surfaces on both sides of the screw hole portion of one half nut piece. The protrusions are provided so as to be elastically deformable inward and outward in the axial direction of the screw hole portion, and are sandwiched between the pair of sandwiching protrusion portions at the center portions of the split surfaces on both sides of the screw hole portion of the other half nut piece. Locking block pieces are formed respectively, and locking step portions for locking in a dead state between the locking claws of the sandwiching protrusion are provided on both surfaces of each locking block piece. At the center of the split surface on both sides of the screw hole of the half nut, The locking projections that are elastically deformable in the inward and outward directions orthogonal to the center are provided respectively, and the locking projections are inserted into the center portions of the split surfaces on the both sides of the screw holes of the other half nut piece. The guide holes to be fitted are formed respectively, and further, the locking step portions are formed at the rear side opening ends of the respective guide holes so that the locking claws protruding from the front end portions of the locking projections are fitted and locked in a dead state. It is characterized by the above configuration.

In such a split nut, the pair of half nut pieces may be formed separately from each other, or the outer end portions of the facing split surfaces may be integrally connected by a bendable strip-shaped connecting piece. it can. And, in the case where both half nut pieces are connected by a strip-shaped connecting piece, it is easy to handle as a split nut that combines these half nut pieces as one set, and when screwing to a bolt or a screw rod, It is convenient because the installation work can be performed efficiently with the half nut pieces being clamped by the fingertips.

Further, on each of the locking claws projecting from the pinching projection and the tip of the locking projection, an inclined locking end surface is formed which is inclined obliquely rearward from the locking claw base toward the tip. By doing so, the joint strength between the half nut pieces is further improved, and slackness does not occur even when the bolts or screw rods are tightly tightened.

[0011]

According to the split nut constructed as described above, for example, when the split nut is mounted on a stud bolt whose both ends are fixed to a wall surface, the half nut pieces are opposed to both sides of a desired portion of the stud bolt and one half Both sides of the locking block piece provided on the other half-nut piece are sandwiched by the sandwiching protrusion provided on the split nut piece, and at the same time, the locking projection piece provided on either half-nut piece is used. If both half nut pieces are pressed toward each other while being inserted into the guide holes provided in the other half nut pieces, the opposing split surfaces of these half nut pieces will join and both half nut pieces will be joined. When one piece is completely screwed into the stud bolt, the locking claw on the sandwiching protrusion of one half nut piece fits and kills the locking step of the above locking block piece of the other half nut piece. , And the locking claws and locking block on the tip of the clamping protrusion. The locking step of one of the half nuts is elastically locked, and the locking claw of the other half nut nut is locked by the tip locking claw of the locking projection of one of the half nut pieces. Part is locked in a state where it is fitted and killed, and the locking claw of the locking projection and the locking step part are elastically locked, and both half nut pieces are perpendicular to the axial direction of the screw hole. Due to the locking action in both directions, the two are integrated inseparably and have the same action as a normal nut, and the same appearance.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 4, a split nut 1 according to this embodiment is composed of a pair of half-nut nut pieces made of synthetic resin molding. 2 and 3, and half-circular screw hole portions 4 and 5 are provided through the center of the split surfaces of these half-nut pieces 2 and 3 to join the split surfaces of both half-nut pieces 2 and 3. By doing so, it has a hexagonal appearance and functions as a hexagonal nut 1 having a screw hole 6 in the axial center thereof. A flat surface including the center of the screw hole 6 and passing between the ridge angles of the outer shape.

Denoted at 7 ... 7 are sandwiching protrusions 7 of the same height which are provided in parallel at four corners of the split surface of one half nut piece 2, and these sandwiching protrusions 7 ... A pair of members provided at both ends of the threaded hole portion 4 in the axial direction on the divided surfaces on both sides of the threaded hole portion 4 so as to face each other functions as one set. Each of the sandwiching protrusions 7 is provided with an elongated hole portion 8 penetrating from the split surface to the rear surface side on the inner side surface side thereof so as to be elastically deformable inward and outward in the axial direction of the screw hole portion, and inside the tip end portion thereof. Is provided with a semi-arrow-shaped locking claw 9 whose projection height gradually increases from the tip toward the split surface.
Further, the inner surface 7a of the sandwiching protrusion 7 on the side of the screw hole 4 is formed as a surface perpendicular to the split surface, and the outer surface 7b is formed as a tapered surface forming one surface portion of the hexagon nut 1. The sandwiching protrusion 7 as a whole has a side triangular shape that tapers from the dividing surface toward the tip.

Numeral 10 is a locking block piece which is provided in the central portion of the split surface on both sides of the screw hole portion 5 of the other half nut piece 3 and is sandwiched between the sandwiching projecting portions 7, 7, When joining the split nut pieces 2 and 3, the front surface 10a facing one half split nut piece 2 is flush with the dividing surface, and is slightly wider than the engaging claws 9 and 9 of the protruding protrusions 7 and 7. Shaped and outer surface
10b constitutes one outer surface portion of the hexagonal nut 1 and is formed into a tapered surface having a length of about half thereof. Further, the locking block piece 10 has both surfaces 10c, 10c formed on an inclined surface which inclines outward in the axial direction of the screw hole portion from the front side to the back side, and forms a ridge line with the both end edges. When the rear end of the screw hole portion in the axial direction of the axial center is formed so as to be perpendicular to each other and the opposing split surfaces of the two half nut pieces 2 and 3 are brought into contact with each other, the sandwiching protrusion portion 7, A locking step portion 10d is provided between the locking claws 9 and 9 for locking the fitting claws 9 in a killed state. 11, 11
Is a rib extending from the end of the outer tapered surface 10b of the locking block piece 10 with the same gradient.

Numerals 12 and 12 are locking projections having the same height and projecting from the central portions of the split surfaces on both sides of the screw hole portion 4 of one half-divided nut piece 2, respectively on the outer surface side thereof. An elongated hole portion 13 penetrating from the split surface to the back side is provided so as to be elastically deformable inward and outward in a direction orthogonal to the axis of the screw hole portion, and the tip portion outside thereof is gradually tapered from the tip toward the split surface side. A semi-arrow-shaped locking claw 14 having a large protruding height is projectingly provided. Further, both ends of the locking claws 14, 14 are chamfered in a tapered shape to facilitate insertion into guide holes 15, 15 described later.

Numerals 15 and 15 are square hole-shaped guide holes which penetrate through the central portion of the split surface on both sides of the screw hole portion 5 of the other half nut piece 3, that is, the central portion of the locking block piece 10. The locking projection 12 provided on the one half nut piece 2 is inserted and fitted. The distance between the inner side surfaces 15a, 15a close to the screw hole portion 5 at the open end of the guide hole 15 on the split surface side is such that the locking protrusions 12 can be easily inserted.
It is formed to be equal to or slightly narrower than the interval of 12 locking claws 14.
Further, the depth of the guide hole 15 is the same as the length of both surfaces 10c, 10c of the locking block piece 10, and the engagement of the locking claw 14 from the base end of the locking projection 12 matching the dividing surface. The dimension is almost equal to the dimension between the toe surfaces 14a, and is formed to be about half the dimension of one surface of the split nut 1. Further, the shape of the guide hole 15 is such that the inner side surface 15a is upright, and the distance between the inner side surface 15a and the outer side surface 15b facing the inner side surface 15a is gradually narrowed toward the depth so that the rear side opening end is formed. Spaced on both sides of locking projection 12
It is formed so as to have a width approximately equal to the width between a and 12a, and further, a locking step portion 15c for locking the locking claw 14 in a dead state is formed at the rear side opening end. The locking step portion 15c is located between the pair of ribs 11, 11 extending from the locking block piece 10, and locking step portions 10d, 10d provided on both sides 10c, 10c of the locking block piece 10. It is formed so as to be flush with.

Denoted by 16 and 16 are recesses formed in the central portion of the rear surface parallel to the dividing surfaces of the two half nut pieces 2 and 3, and when the half nut pieces 2 and 3 are joined, slippage of the fingertips occurs. The nut 1 can be assembled while being prevented and securely engaged.

Using the split nut 1 constructed in this way, for example, as shown in FIG. 7, various pipes P are provided in the middle portion of an existing stud bolt B whose upper and lower ends are fixed to a wall W or the like.
When installing the saddle C holding the stud, the two half nut pieces 2 and 3 are respectively positioned so as to sandwich the stud bolt B on both outer sides of the stud bolt B at the desired mounting position of the saddle C, and then These half nut pieces 2,
When 3 is pressed toward each other, the sandwiching protrusions 7, 7 provided on the one half nut piece 2 are sandwiched between both surfaces 10c, 10c of the locking block piece 10 provided on the other half nut piece 3. Wearing, and at the same time, locking projection piece 1 provided on one half nut piece 2
2 and 12 are inserted into guide holes 15 and 15 provided in the other half nut piece 3.

When these two half nut pieces 2 and 3 are connected, the clamping block piece 10 of the other half nut piece 3 is sandwiched between the sandwiching projections 7, 7 of the one half nut piece 2. Both sides 10
When c and 10c are engaged while being clamped, the clamping protrusion 7 is gradually elastically deformed outward in the axial direction of the screw hole, and the split surfaces of the two half nut pieces 2 and 3 are completely in contact with each other. Sometimes locking block pieces
The locking claws 9 and 9 are locked to the locking step portion 10d of 10 and at the same time, the sandwiching protrusions 7 and 7 are elastically restored to the inside, and the locking step portion 10d
The d and 10d are locked between the locking claws 9 and 9 so that they are fitted and killed.

On the other hand, the locking projection piece 12 of the one half nut piece 2
Is inserted into the guide hole 15 of the other half nut piece 3 from the locking claw 14 and slides in contact with both outer side surfaces of the guide hole 15 which becomes narrower toward the rear side in the direction orthogonal to the screw hole axis. Gradually elastically deformed, and when the split surfaces of the two half nut pieces 2 and 3 are completely abutted, the locking claw 14 that has slipped out of the guide hole 15 is locked to the locking step portion 15c at the rear side opening end. At the same time, the locking projection 12 is elastically restored to the outside, and the locking step portions 15c, 15c on both sides are locked between the locking claws 14, 14 in a fitted and dead state.

In this way, the two half nut pieces 2 and 3 are inseparably connected and integrated by the locking action in both the axial direction and the direction orthogonal to the axial direction. As shown in 6, both half nut pieces 2, 3
A screw hole 6 is formed by the screw hole portions 4 and 5, and the screw hole 6 is screwed into the stud bolt B. In addition, the sandwiching protrusions 7, 7 of the one half nut piece 2 are the other half nut pieces 3 and 3.
Are joined along both sides 10c, 10c of the locking block piece 10 of
Further, the locking claws 9, 9 come into contact with the ribs 11, 11, and the outer taper surface of the locking block piece 10, the rib 11 and the pair of sandwiching projections 7 allow the screw on the other half nut piece 3 side to be screwed. The outer surfaces of both sides of the hole portion 5 are formed as flat surfaces which are substantially flush with each other, and the outer surface of the nut 1 and the outer surface having the recesses 16 and 16 adjacent thereto and the outer surface where the long hole portions 8 and 13 are open are almost normal. Of the hexagonal nut 1, and the flat end surface of the hexagonal nut 1 in which both end surfaces of the half nut pieces 2 and 3 are flush with each other and the screw holes 6 open. It is one complete nut.

After that, the saddle C can be fixed and held at an arbitrary position of the stud bolt B by rotating the same as the ordinary hexagon nut 1.

In the above embodiment, the pair of half nut pieces 2 and 3 are formed as separate independent parts. For example, as shown in FIG. The outer ends of the divided surfaces may be integrally connected by a bendable band-shaped connecting piece 17. In this way, by connecting the two half-split nut pieces 2 and 3 with the strip-shaped connecting piece 17, it is easy to handle as the split nut 1 in which the both half-split nut pieces 2 and 3 are a set, and the bolt body and the screw are When screwed onto the rod, it can be efficiently attached with one hand while pinching the outer ridge corner portions of both half-divided nut pieces 2 and 3 with a fingertip and pinching.

In the above embodiment, the locking projection 12 is formed on one half nut piece 2 and the guide hole 15 is formed on the other half nut piece 3 by using the locking block piece 10. However,
On the contrary, the locking projection 12 is projected on the locking block piece 10 of the other half nut piece 3, and the guide hole 15 is provided in the one half nut piece 2.
It may be provided on the side.

Further, as shown in FIG. 9, the locking claws 9 and 9 of the sandwiching protrusions 7 and 7 and the locking claw 14 of the locking projection 12 provided on one half nut piece 2 are locked. If the end surfaces 9a and 14a are respectively formed on the inclined surfaces that are inclined obliquely rearward from the locking claw base toward the tip, even if the force to push the half nut piece outward is increased, The tips of the locking claws 9 and 14 slide inwardly along the locking surfaces of the locking step portions 10d and 15c to deeply engage the locking step portions 10d and 15c. As long as 9 and 14 are not broken, half nut pieces 2, 3
It can withstand strong tightening without being disengaged.

[0026]

As described above, according to the split nut of the present invention, since it is formed, it is composed of a pair of half nuts and has a semicircular shape at the center of the split surface of these half nuts. A split nut having a screw hole portion extending therethrough, wherein a pair of split nuts on both sides of the screw hole portion has a locking claw inside the tip portion at both ends in the axial direction of the screw hole portion. Of the pair of sandwiching protrusions are provided at the central portions of the split surfaces on both sides of the screw hole portion of the other half nut piece so as to be elastically deformable inward and outward in the axial direction of the screw hole portion. Locking block pieces to be sandwiched between are formed respectively, and locking step portions are provided on both surfaces of each locking block piece so as to be fitted and locked between the locking claws of the sandwiching projections. At the center of the split surface on either side of the screw hole of one half nut nut, Locking protrusions that are elastically deformable in the inward and outward directions orthogonal to the part axis are respectively provided to project, and the locking protrusions are provided at the central portions of the split surfaces on either side of the screw holes of the other half nut piece. Locking step portion for forming a guide hole into which the lock tab is inserted and further locking the locking claw projecting outside the tip end portion of the locking projection piece at the opening end on the back side of each of the guide holes to lock in a killed state. Are formed.

Therefore, during the work of mounting the split nut,
Both sides of the locking block piece provided on the other half nut piece are sandwiched by the sandwiching protrusions provided on one half nut piece, and at the same time, the locking projections provided on one half nut piece. While inserting one of the half nut pieces into the guide hole provided in the other half nut piece, the opposing split surface of both half nut pieces will be separated by a one-touch operation that simply presses both half nut pieces toward each other. After joining, the locking claws of the sandwiching protrusion of one half nut piece are sandwiched by the locking step portions of the above locking block pieces of the other half nut piece while being fitted and killed. One of the half nut pieces can be locked by the tip locking claw of the locking projection of the other half nut piece, and the locking step portion of the other half nut piece can be engaged and killed. The piece is inseparably integrated by the locking action in both the axial direction of the screw hole and the direction orthogonal to it. It is intended to achieve the same effect as normal nuts and.

In this way, both half nut pieces can be connected and fixed to form a nut body of one locking claw, and other connection means such as a cover body and a connecting pin can be formed like a conventional split nut. Since it is not necessary to prepare a separate tool, it is not only easy to perform the connecting operation, but also the semicircular screw hole part of both half nut pieces is securely screwed to the desired part of the bolt body or screw rod. In that screwed state, the locking block piece of the other half nut piece is fitted between the sandwiching protrusions of the one half nut piece, and one of the half nut pieces is locked. Since the protruding piece fits into the guide hole of the other half nut piece, the shape of the outer peripheral surface is almost the same as the normal nut body, and the wrench etc. can be securely locked to the outer peripheral surface to ensure smooth operation. It is possible to perform various tightening and rotating operations.

Further, even in an existing screw rod whose both ends are fixed to the wall surface, etc., after the pair of half nut pieces are positioned on both outer sides thereof, the screw portion is sandwiched from both sides. The split nut piece can be engaged, and the locking block piece and the locking projection piece are fitted into the guide hole between the sandwiching projections and are in a state of being killed. Therefore, even by external force such as vibration or strong tightening force. There is no danger of it coming off, and parts and the like can be firmly fixed.

According to the third aspect of the invention, since the two half-divided nut pieces are integrally connected by the band-shaped connecting piece, the half-nut nut pieces are easy to handle as a split nut which is a set. When screwing into a bolt or screw rod,
It is possible to perform the mounting work efficiently with both half nut pieces sandwiched by the fingertips.

Further, according to claim 4, the locking claws of the sandwiching projections and the locking claws of the locking projections provided on one of the half nut pieces are obliquely rearward from the locking claw base to the tip. Since the inclined locking end surfaces that are inclined to each are formed, even if the force to push the half nut piece outward is increased,
As long as the tip of the locking claw slides inwardly along the locking surface of the locking step and engages deeply with these locking steps and the locking claw is not broken, a half nut piece It is possible to withstand strong tightening without disengagement.

[Brief description of drawings]

FIG. 1 is a perspective view showing a pair of half nut pieces in a separated state in an embodiment of the present invention.

[Figure 2] Front view

[Figure 3] Side view of the vertical section

FIG. 4 is a side view in which a part of the cross section is shown.

FIG. 5 is a plan view showing a state in which both half nut pieces are combined.

FIG. 6 is a side view thereof.

FIG. 7 is a front view showing a usage example.

FIG. 8 is a plan view showing a modified example.

FIG. 9 is a sectional view of a locking claw showing another modified example.

[Explanation of symbols]

 1 split nut 2 one half nut piece 3 the other half nut piece 4 screw hole part 5 screw hole part 7 clamping protrusion 9 locking protrusion of clamping protrusion 9a locking end face 10 locking block piece 10c Stop projection piece 10d Locking step part of locking block piece 12 Locking projection piece 14 Locking claw 14a Locking end face 15 Guide hole 15c Locking step part 17 Belt-like connecting piece

Claims (4)

[Claims] 1. A split nut comprising a pair of half-nut pieces, and a semi-circular screw hole portion penetrating the center of the split surface of the half-nut pieces, wherein the half-nut nut is one half-nut nut. A pair of sandwiching protrusions with locking claws inside the tip are provided at both ends of the split hole on both sides of the screw hole in the axial direction so that they can be elastically deformed inward and outward in the axial direction of the screw hole. At the same time, the other half of the half nut piece is formed with locking block pieces to be sandwiched between the pair of sandwiching projections at the central portions of the split surfaces on both sides of the screw hole portions. On the other hand, a locking step portion is provided between the locking claws of the sandwiching projection portion for locking in a fitted state, while at the central portion of the split surface on either side of the screw hole portion of one of the half nut pieces, Providing elastically deformable locking protrusions inward and outward, which are orthogonal to the screw hole axis At the same time, guide holes into which the locking projections are inserted are formed in the central portions of the split surfaces on either side of the screw holes of one of the other half nut pieces, and the rear opening ends of these guide holes are formed. The split nut is characterized in that a locking step portion is formed in which the locking claw protrudingly provided on the outer side of the front end portion of the locking projection is fitted and killed and locked. 2. The split nut according to claim 1, wherein the pair of half nut pieces are formed as separate independent parts. 3. The split nut according to claim 1, wherein the outer ends of the split surfaces of the pair of half-split nut pieces are integrally connected by a bendable strip-shaped connecting piece. 4. An inclined locking end surface inclined obliquely rearward from the locking claw base toward the tip is formed on each of the locking claws protruding from the sandwiching projection and the tip of the locking projection. The split nut according to claim 1, which is provided.