CA2015785A1 - Divided nut - Google Patents

Abstract

Abstract of the Disclosure A divided nut comprising two divided nut parts made of plastics which provide engaging projection means and engaging step means so as to enage with each other in a state of fixed fittings. The divided nut parts are integrally connected to each other by means of belt-like connecting means where they are bent to fit each other.

Description

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Div;ded Nut This ;nvention rela~es to a divided nut ~ade of plastics which may scr~w on a bolt or a screw bar lrldivis~bly~ -Div~ded nuts of several t~pes, which ~o~prise a pair of divided nut parts, have been de~elopedO ~s a ~eaas of screwing the divided nut on a bolt or a screw bar in such a state thatt~e divided nut parts are connected to each other, the followings are well o known. ~or instance, Japanese Utility Model Publication No. 50-37489 discloses that the divided ; nut keeps its screw fittings onto a bolt or a screw bar by holding the ou ter peri pher i es of the d i v i ded nut parts by means of a cover in such a state that ~ 15 the opposi te surfaces of both of the divided nut parts : are connected to each other. Further, British Patent ~1 No. 855,037 discloses a divided nut. Divided n~t :;~ parts of the divided nut are hinged rotatably at a side portion of each of the parts. Another side of each of the parts, which sides are facing each other, provides ~ connectable projection having a hole. A
pin is inserted into the holes of both of the projections so as to comprise an ordinary nut.
Howevsr, the divided nut of the fornler prior art .
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becomes expensive as it necessit~tes a cover.
Further, it ;s complex and takes time in fitting of the cover onto ghe divided nut while connecting the divided nut parts to each other and keeping them in its screwed position on a bolt or the like.
MoreoYer, sueh a divided nut needs a means for fixing the cover so that the cover may not oome of f t~e divided nu$. Further, it has a disadYantage that such a divided nut cannot be used for a screw bar which is already installed. Na~ely, in the case of a screw bar both ends of which are fixed to a wall or the like, both of the divided nut p~rts of the divided nut may be positioned on the screw bar to sandwich the screw bar from the sides thereo.
However, a cover for holdinlg the divided nut parts cannot be placed in its own position unless it is inserted to and positioned on the screw bar before .. . .
fixing of the screw bar to the wall.
: Accordi~g to the divided nut of the latter prior .. : .
~ ~: :20 ~art. the aboYe mentîoned disadvanta~es in the former :, .
~ : pr~or ar$ ~ay be solved al~ost. howev~r, when the ~, , .
hinge of the di~vided nut pasts is shifted 3li~ghtly iD
a direction of an axis of the h:inge or ia a dirsction i;
of twist, the diuided nut cannot be fit into a bolt ~: , :l 2~5 or a screN bar and its connection does aot ~o in ~ood ;~
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order. Further, the divided nut is so constructe~ as to be able to assemble the divided nut parts by inserting the pin into the holes of the connectable projeetions provided with the opposite faces of another other side of each of the divided DUt parts.
- Therefore, when a clearance is formed sl;ghtly : between the pin and the holes. it cannot obtain a ;~ good screw connection as play occurs there~etween.
~urther, when the pin is lost, the divided nut cannot work.
: Since both kinds of the divided nuts as mentioned above, are screwed detachably onto a bolt or a screw bar, tbey may easily come off the bolt due to vibration or otber external :Forces.
In order to solve the albove-ment;oned problems, the presant invention has an obiect to provide a ~ ` di~rided nut mads of plastics s~1hich may be attached to ;:~ a screw bar, one cr both ends of ~bich are already installed in a wall or the like, in a state of fixed fittings by a s~imple fitting op0ration. .
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~ To achi~ve the above me~ti~ned obJect, according to the present invention the divided nut comprises two divided IlUt parts of plastics divided along a ~: : : directiosl o:f an axis of th-e s~crew hole of ~ the d~:vided ~: ` 25 ~ ~lut and connected t:o each other with a side sf each .

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thereof facing to each otherl f i tting projection ~eans projected from the facing side of one of the divided screw parts, al~ engaging p~wl provided with a t;ip of the fitting projection means~ a groove formed with 5 the opposi t~ side of the other divided screw part to receive the fittillg projection means of one of the divided screw parSs and an engaging step formed with the facing side of the other divided nut part ~o enga~ the ~ngaging ~awl of one of the divided nut o part in a state of f ixed f ittings.
~ ccording to the divided nut as mentioned above, where i t is a t tached to a s tud bolt both ends of ` which are instal led in and f ixed to a wall or the like, the divided nut parts are faced to each other at a desired position on the stud bolt by interposing the stud bolt and they are pressed in a direction of approaching them to each other while the fitting : projection means of one Or the divided nut part is ; inserted into the groove of the other divided nut part. Thens the opposite sides of both of the divided nut pa~ts are contacted to each other. When the ~ divided nut parts are s crewed co~p I etely onto $he stud ; bolt, the engaging pawl of the fitting projection means flexibly engages with the engaging step formed with the other divided nut part and lhen the divided 2~1~7~
nut parts are united to be detachable and present an appearance of and function like an ordinary nut.
Namely, the divided nut parts are united to a nut only by insertin~ the fitting proiection ~eans of the 5 divided nut part into the groove of the other div;ded nut part so as to cGnnsct and f ix them each other.
Therefore, it is not necessary to use connecting means such as a cover, a connection pin or ~he like, which ~ are used for the conventionaldivided nut. This means '~ lo that connecting operation of the divided nut parts may ; be easily carried out. Further, since the divided nut p~rts may be screwed onto a bolt or a screw bar at a de~ired position with their screw holes in a shape of a semicircle, the state of screwing may be :.
continued so that a smooth sorew operation becomes ; possible on the bolt in forward and rearward ~ directions.
-~ ~urtherJ in $he case of a screw bar both ends of ~ which are fixed to a wall or the like, a pair of the : ~ 20 divided nut partl may be~position~ed on the sides of the screw bar so as to sandwich the screw bar and then connected to each other. Since the engagin8 pawl of ,, .
;~ the fitting projection ~eans ~gages with the engaging ~ep of the groove of tbe other divided ~ut part and :~ ~ 25 b~co~es in a~st~te of fixed fittings~and detachable`,~ :

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they do not com~ off the screw bar, thereby any parts ~tt~ched to th~ screw bar may be fixed firmly.
Moreover, when the divided nut parts are connected to each other, the fitting projection means of one of th~ divided nut parts is fitted into the groove of the other divided nut part and therefore the appearance of the divided nut parts presents the same - as that of an ordinary nut. This means that it becomes posslble to rotate and tighten the divided o nut smoothly by engaging a wrench wi$h the outer periphery of the divided nut.
: Anothe~ object of the present invention is to provide a divided nut made of plastic which is easy i n handling and attaching onto a bolt or a screw bar.
In order to achieve the object, the divided nut according to the present invention further co~prises : bendable ~elt-like connecting ~ans which integrally :~ connect a side of a divided nut part of the divided nut and a sid~ of another divided nut part, both of t~e sides of th~ div;ded nut parts being faced to each other. Since the divided nut parts are united by : the:bendable belt-l;ke connectin~ means and not separated to one another, it ~ay prevent one of the .
: divid~d nut parts from loosening. Further; when ~ ~ 25 handling the divided nut parts or attaching them`onto ' :
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a bol t, they ~ay be handled easi ly as a single body.

Other objects and advantages of the present invention may be apparent f rom the deseri ption of the embodiments with reference to the drawings in wh;ch:-.
5Figs, lA and lB are a plan vie~ and a side vie~ of ^ a pair of divided nut parts, Figs. 2A and 2B are a plan view and a side view of the divided nut parts in a state of connection, Fig. 3 is a perspective view of the divided nut lopar ts, `, Fig. 4 is a perspective view of a divided nut part showing another embodiment of the present invention .:
Pig. 5 is a perspective view of a divided nut :
showing a further eml~odiment of the present invention, ~., ~ ....
15P:ig. 6 ;s a plan view showing a state of connection ~of :the divided nut in Fig. 5, ig. 7 is :a perspecti~ve view showing~a nlodified ., :
embodiment OI :the divided nut~shown in Fig. 5.
Fig. 8 is a plan view of the divided nut shown in ~, .
: : 2 0 ~ i g . 7, ig. ~ 9 :i s ~ a s i de v i ew ~ of the d i vi ded nu t shown~ i n .. 7 , .

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Fig. 7, Fig. 10 is a side view showing a state of using the divided nut, ~ ig. 11 is a perspective view of a divided nut of anoth~r embodiment according to the invention, Fig. 12 is a sectional view taken at a center of the divided nut for showing bending state thereof, Figs. 13A and 13B are side viewso~ the divided nutl lo Fig. 14 is a side ~iew showing a connecting state : of divided nut p~rts thereof, Fig. 15 is a plan view showing the connecting state, Fig. 16 is a side view showin~ usage of the ~: 15 divided nut.
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The embodiments of the present invention are now - described below with reference to the drawin~s.
divid~d nut 2 is ~ade o plastics such as hard y~thetic resin and formed -to have~an appearance of a bexa~oR and a screw hole 1 is prov:ided at a center ~: : portion thereof. The divided nut is divi~ed into two . ~
~ diYided nut parts 2A~and 2B along an axis of the screw : ~ hole l.
~ ac~ of th~e di-vided nut parts 2~A aad 2B, ~ .

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therefore, provides a screw hole portion lA or lB of s~micircle respecti~ely ~t the center portion of a connecting side thereof which i~ facing to each other when th~y are connected to each other. A fitting projection 2a of convex is made to proiect respectively from both sides of the connecting side of one of the divided nut part 2h toward the other divided nut part 2B. An engaging pawl 2al is formed respectively with both of the outer sides of a tip of ~ 10 the fitting projection 2a to have an inclined side ::; whicb is gradually raised rearwar~ly An en~agin~
step 2a2 is formed respectively with both of the outer sides at the base of the engaging projection 2a.

The other divided nut part 2B provides a pair of ` 15 proiections 2b of concave respectiveIy on both of th~
`` side portions of the conn~cting sîde thereof in such . i ~
a~manner that the fitt;ng proJections 2a proiect oward:another divided nut par~ 2A, leaving, in a ,, .
` direction of a~ axis of the screw hole IB. a space subs~tantially eq~al to a ~width of the fittin~
projection 2a. Th~ space b~tween~the`projections 2b and 2b. ~hich ar~ facing to eaeh o$her~ i~ for~d to be a guid~ groove 2b3 for the ~itting proj~ction 2a.
EnEagi~ steps 2bl and 2bl are form~d with the bottom ., :
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2 915 7 ~ 3 o~ the projections 2b and 2b so as to eng~.ge with the engaging pawls 2al and 2al. Further, engaging pawls 2b2 and 2b2 are form~d with the fac;ng sides of a tip of the proiections 2b and 2b so as to engage with the 5 engag;n~ steps 2a2 and 2a2 of the fitting projection 2a.
:~ The numeral 2a3 indicates a slit formed by cutting from a center portion of a tip of the fitting projection 2a to the engaging surface. The slit 2a3 lO ~ives a spring effect to the fitting projection 2a so as to allow an eiastic deformation in a di~ection of a ~: w i d th thereof .
A slit groove 2a4 is cut straight on both of the outer sides of the fitting projection 2a straight in ~; 15 a lon~itudianl direction of the fitting projection 2a and on the other hand a small projection 2b4 is nlade ~i : to project from the inside of a tip of the projection i ,~
2b so as to engage with the slit ~roove 2a4 in order to carry out a co~nection easily a~d precisely between 2~ the divided nut parts 2A and 2B.
~` However, where a guid~ ~roove is formed with both , ~ .
of the sides of the divi:ded nut :part 2B to receiY~ the ~: fitting projection 2a of another divided nut part ~A
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*ithout providing th~ ~rojections ~b and 2b with the: ~ :
25: other divid~d nut part 2B, it is no~ r,0cessa~y to .

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provide such slit groove 2a4 and small projection ~::
~b4. Besides, the engaging steps 2a~ and 2a2 and the enga~ing pawls 2b2 and 2b2 are not necessary only by formin~ the engaging steps 2bl and 2bl with the bottom of the ~uide groo~e.
; The divided nut constructe~ as above is handled as the two divided nut parts 2A and ~B as shown in Figs.
lA and lB, before it is used.
For instance, as shown in Fig. 10, where a saddle o 5 holding a pipe 4 is attaohed or mounted onto a stud bolt 3 which is installed in and fixed to a wall W
with its upper and lower ends, both of the divided nut parts 2a and 2B are pos;tioned outwardly of the sides of the stud bolt 3 at a desir~d poition of the : 15 saddle 5 on the stud bolt 3 and then these divided ;~ nut parts 2A and 2B are press~d in a direction to be ~: ; close to ~ach other so as to insert the fitting proj~ctions 2a and 2a of the divided nut part 2A into th~ guide groove 2b3 o~ the other divided nut part 20~ 2B. As ths res~lt, the engaging pawls 2al and 2al of~
the fitting pro3ec:tions 2a and 2a are forced to b~ in contact with~;the ~facing side of t;he guide ~roove 2b3 :~: and :the faci:ng inside of the f i tting proj ections 2a and ~2a a~ g1id i n ~the gu ide groove 2b3~, ~while : zs contac:tins~ the; wall of the guide groove, in such -a~ :
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state that with the function of tbe slit 2a3 the engaging pawls are elas~ically moved in a direction to approach them each other, When the engaging pawls 2al and 2al of the fittin8 projections 2a and 2a reach the bottom of the guide ~roove-2b3, the engaging pawls 2al and 2al elastically engage with the engaging steps 2bl and 2bl of the guide groove 2b3 so that the facing sides of the divided nut parts 2A and 2B are integrally connected to each other. Thus, the lo circular screw hole 1 screwed on the stud bolt 3 may be for~ed ~;th the semicircular screw holes lA and lB
of the divided nut parts 2a and 2B.
Thereafter, the divided nut is rotated like an ordinary nut, and fixes and holds the saddle 5 on the stud bolt 3 at a desircd position.
~ig. 4 shows anotber embodi~ent-of the present : invention. A fitting projection 2a is made to proiect frol~q a cent~r portion of a ~ide of a divided nut part 2' and projections 2b of conca~e is also made 20 to pro3ect fro~ . both of the sides ~ on the other side of th~ divid~d nut part 21 . With this construction , : it is possible to co0prise a divided nut by u~ing two ~ .
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-~ p;eees of tbe divi:d~d nut part 23 of the same shape.
Therefore, thi~ e~bodi~ent only r~quires a set of ::
s dies for ~olding the divided~nut parts Nith plastics ~
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and may reduce the molding cost.
Fi~s. 5 and 6 show a further embodi~ent of the present invention. ~ long fitting projeetion 2c of convex and a short fitting projec-tion 2cl of convex are pro~ided to project from the center of both ends of the connecting side of the divided nut part 2C, : said long and short fit ting projections being provided with an enga~ing pawl respecti~ely at the ;~ outer side of a tip thereof, are provided to project o from the center portion of both of the side on a ~` connecting side of a divided nut part 2C facing a connecting side of another divided nut part 2D.
~ groove 2dl is formed with the eonnectin~ side o~ the : other divided nut part 2D at a center of a side ~ ~ .
~ 15 portion thereof so ~s to receive therein and engage . j .
`` with the short fit~in~ projection 2c~. Aprojection ~d of concave is provided wi th both ends of the other side of the divided nut part 2D to receive therein and enga2e ~ith thc lon~ fitting projection 2cl.
~20 ~urth;~r. these divlded nut parts 2G a:nd 2D are :connected iDtegrally at a side end of the connectin ,~ .
-~ ~ides thereof by means of two bendable belt-like ~, ~ ~ : connectors 9~and 9.
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igs. 7 and 9~show a:further embodiment of the~
:: 2s ~ present invention ~odifying the divided nut o~:~hard -: 1 3 2 ~

synthetic resin as shown in Figs. 5 and 5. ~ pair of divided nut parts 2 and 2E have a shape which is obtained by dividing a nut OI hexagon in a direction of an axis of a screw hole 1 along a line l;hat goes throu~h the axi s of the screw hol e 1 and two corners o the hexagon which are opposed to each other.
Engaging projections ~a and 2a are made to projeet perpendicular to both of sides 7 from the center portion of both of sides 7 and 7 of one divided nut o part 2E, said engaging pro jections having the same height. An en~agin~ pawl 2al haYing the same shape as the engaging pawl 2al o~ the above mentioned embodiment, is formed with $he outer side of a tip of each of tlie fitting pro jections 2a and 2a re~pectively. ~ straight slit 2a3 is formed with the center portion oP the enga~ing pawls 2al and 2al to ; extend from their surface of the tip to the connecting sid0 so as to separate f i tting proj ec tions 2a5 and :~ : 2aS which are paralell to each otber and elastically bend~ble in a dir~ctioa to close the straight slit 2a3~ The outer side of each :o~ the fitting projections 2a and 2a is forg~ed to be a taper side 8 .
which~ co~prises a portion of a side of a nut in~ the ~ s`hape o~f hexagon .
`1 ~ 25 Grooves 2b3 and 2b3 ~are formed with center . , . I l ' ... .~.

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portions of both sides of the other div;ded nut part 2~ fro~ its outer side to the screw hole lB of : semicirsle. Th~ sides of the goov~ 2b3 facing to each other, are formed to be parallel sides. A width of the groo~e is made to be larger than a width between the tips of th~ engagin~ pawls 2al and 2al.
and also ~ade tP be small slightly than a width : betwe~n the bases of the ~ngaging pawls. The botto~
sides of th~ ~rooves 2b3 and 2b3 are for~ed to be 0 perpendicular to the connecting sideg i.e. to be parallel to eaeh other. An engaging step 2bl is formed by ex~anding or widening the deep portions of the grooves 2b3 and 2b3 outwardly so as to receive the engaging pawl 2al when the engaging nut parts 2E
:: 15 and 2F are completely connected to each other.
The divided nut parts 2E and 2F as constructed above. are integrally connected to each other at a side of each of the connecting sides thereof by means of bendable thln belt-like connectors 9 and 9. When ~` 20 the divided nut parts 2E and 2F are attachedto a bolt or a screw b~r, they are pQSi tioned to sandwich the bolt via the space between the sides of thereof which : are not connected by the belt-like connectors 9 and 9, and then these divided nut parts 2E and 2F are 2s pres~e~ in a direction to be close to each other. As the result, the outer taper sides of the engaging pawls 2al and 2al of the fitting projections 2a and 2a contact and slide oa the faclng sides of the grooves 2b3 and the fittin~ projection 2a ~oes into-the ~roove 2b3 while elastically defor~ing theengaging pawls 2al and 2al to be compressed. When the faci~g sides of the divided nut parts 2E a~d 2F are co~pletely connected, the engaging pawl 2al - elastically returns outwardly so as to engage with o the enga~ing step 2bl in a state of fixed fittings as an ordinary nut.
A further e~bodiment of the present invention will be described below with reference to Figs. 11 through 16.
15A divided nut 11 is made of hard synthetic resin and it is formed in a shape of hexagon. The divided nut 11 has a screw hole 12 at the center thereof and divided into two pieces of divided nut parts llA and - llA in a direction of an axis thereof along a line passing two corners of the hexagon which are located symme triGa 1 1 y .
Therefore, the divided nut parts 11~ and llA
provide semicircle screw portions 12A and 12B at the center of each of divided facing sides 13 and 14. A
side edge of t.le divided side 13 of the divided nut .

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parts llA is connected to a side ed~ of divided side 14 of the divided ~ut parts llB by ~eans of two belt-like connectors 15 a~d 15~ The belt-like connec~ors 15 and 15 are ~ade of hard synthetic resin to be Sbendable and for~ed to be integral wi th the divided es 13 and 14 by tlsin~ the same material as that of the divided nut parts 11A and llAs and these connectors are formed to be thin and have a narrow width. ~owe~er, the bel t- 1 ike connectors 15 and 15 10R~ay be constructed to a single body.
: As shown in ~ig. 13A. a pair of holding proj ections 12a2 and 12a2 are provided wi th both ends of the outer side of the semicircle screw hole portion : 12A fo~med on the divided side of the divided nut : ;
15part 11~. The holding projections 12a2 and 12a2 are made to project in parallel to each other to be able to elastically deform in inward and outward directions and provide an engaging pawl 12al with the ~: inside of a tip thereof, respectively. Also, the 20holding projections pro~ide grooves 12a3 and 12a3 on ~: the outer side of the divided nut part 11A. Incl ined engaging sides 12a4 and 12a4 are formed wi th the :~ engaging pawls 12al and 12al in such a manne~ that they are inclined rearwardly from the base of the 25engaging pawls to a tip thereof. ~ bending portion ~,~
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15A. which i~ forMe~ to be thin in thickness, is provided with the belt-like connector 15 at a shifted position adjace~t the divided nut p~rt 11A which provides the holding proiections 12a and 12a.
Purther, As shown ;n Fig. 13B, An engaging projection 12b1. ~hich is held between the holdin~
.~ projections 12a2 and 12a2. is formed with a center portion of the outer side of the semicircle screw hole portion 12B in such a stats that it bêcom~s 0 slightly thick co~paring with a space b~tween the 0ngaging pawls of the holding projections 12a2 and 12a2. Both sides of the engaging projection 12bl is formed to b~ inclined sides 12b2 and 12b2 which `~ increase its thickness gradually from a tip thereof to the inside or base thereof. ~t a center of each of the sides of the en~aging projections 12bl and 12bl, engagin~ steps 12b3 and 12b3 are formed to take a step ; perpendicularly so that they are f i t between the~ engaging pawls 12al and 12al of the divided nut part : ~ 20 llA in a state of fixed fittings when the divided sides 13 and 14 of the di~ided nut parts 11~ and llB
are contacted and connected to each other.
Na~ely, as shown in Fig. 14. distances from the .:: divided side 13 of the divided nut part llR to engaging sides 12a4 and l~a4 of the engaging pawls .

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12bl and 12bl~ are d~igned to hav~ the ~a~e sizes as d i s ta n ce s f r om t h e d i v i d ed s i d e 1 4 of t h e c the r di~ided DUt part llB to the ~ngaging ~3t8pS l~b3 and 12b3. thereby the engaging 5teps 12b3 and 12b3 ~ay be 5 enga~ed wi t~ tlhe engaging pawls 12al and 12al in a s ta te of f i xed ~ i t t i ngs when the d i v i ded nu t par ts , lla and llB are contacted and connected to each other.

The engaging steps 12b3 and 12b3 may be constructed to forrn an incllned step which rnay enga~e o with the enga~in~ sides 12a4 and 12a~ of the engaging pawls 12al and 12al in a state of face to face con tac t .
Further, a fitting projection 16 is providedwith a center portion of each of the sides of the engaging projections 12b1 and 12bl, respec tive1y. ~he fittin~
projection 16 is for~ed in a shape of a side of hexagon and becomes thin gradually towards a tip thereof . A f i tting groove 17 is provided wi th a cen ter por t i on of the d i sl i ded s i de of the o ther 20 divided nut part llA in order to receiYe the f i tting proj ecti on 16.
The outer periphery of each of the divided nut parts llA and llB provide f inger hook portions 12a5 ~ 25 and 12b5 of concave respectively for easily pushing `':

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and connecting the divided DUt parts with fingers.
Th~ outer sid~ of each of the holding projections 12a2 and 12a2 is formed to be an inclined side which co~pris~s a part of the outer peri~hery of a nut of hexa~on to range to the same plane as tbe outer side of the e~gag;ng projection~ 12b1 and 12b1 when the divided sides 13 and 14 of the divided nut ~arts 11a and 11B are contacted and connected to each other.
The divided nut parts 11A and 11B are connected to :~ 10 ~ach other in a state of fixed fittings by using ; substantially the same manner as mentione~ ;n th~
first embodi~ent of this in~ention and each of the elements of the divided nut 11 may function as well in the case of the first embodiment so as to be screwed into a bolt B as shown in Fig. 16.
, Besides, the belt-like connector 15 is for~ed to have a bendable thin portion at a position adiacent the divided nut part 11A which provides the holding projections 12a2 ~nd 12a2 at the c~nter thereof in ; 20 its longitudinal directiion. Therefore, the diYided ~` nut parts 11A and llB may swing to close to each ~` other about the bendable portion 15A. In the swing, the divided nut part 11A is swun~ or rotated ~hile ;~ the diYidsd side 13 of the divided nut part llA is ~ 25 pulled slightly toward the connector 15 against the ~ , ; 2 0 .. . . ., -- . . , .

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oth0r divided nut part lllB. ~ccordillgl~, the tips of tbe holdi~ proj ~ction~ 12a2 and 12a2 ma-y be c~rtainly ins~rted and fitted into both of th~ sides of the engaging proj ection~ 12~1 and 12bl of the 5 other divided nut part 11B wi thout contacting the divid~d side of the divided nut part 11B. Further, whe~ the diYided nut 11 is screwed at a pred~termined posi ticn on a bol t by means of a wrench or the ~ ike, tightenin~ force ~ay be dispersed via the ~;des OI
o scr~w of the semicircle screw hole portions 12A and 1 2B atld a part of the t i gh ten i ng f o~ce f un~ ti ons to widen or separate the divided nut parts llA and llB
outwardly~ However, such :a tightenin~ force also disperses and function~ to press the holdin~
lS proj ections 12a2 and 12a2 toward the engaging proj~ctions 12bl and 12bl in up and down directions.
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Therefore, the engagements of the engaging pawls 12al and 12al to the engaging steps 12b3 and 12b3 of the divided nut part llA and llB, cannot be released even 20 if they are tightened byany strong forces.
~ urthsr, where the incl ined engaging ~ides 12a4 is formed wi$h each of the engaging pawls 12al and 12al tc incline rearwardly from the base of the engaging pawl toward a tip thereof, even if a force of 25 separating the divided nut parts 11~ and llB

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out~ardlly b~o~es great, the tip portion of each of th~ ~nga6ing pawls 12al and 12al ~ay sl ide i~ ~
direction of ~lsga~ing inwardly alon~ the engaging sides oi th~ engagin~ steps 12~3 and 12b3. and as the result, the enga~ing prnj~ctions 12b1 arld 12bl may e3lga5e, ~th the engaging s$eps 12b3 and 12b3 deeply.
Ther~gore, the engage~ent of the divided nut parts 11~ and 11B cannot be released unlsss the engaging o pawls 12a1 and 12a1 are broken, a~d the divided nut ~ay b~ar witll strong tightening forces.

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Claims (6)

1. A divided nut comprising:
two divided nut parts of plastics divided along a direction of an axis of the screw hole of the divided nut and connected to each other with a side of each thereof facing to each other, fitting projection means projected from the facing side of one of the divided screw parts, engaging pawl means provided with a tip of the fitting projection means, groove means formed with the opposite side of the other divided screw part to receive the fitting projection means of one of the divided screw parts, and engaging step means formed with the facing side of the other divided nut part to engage the engaging pawl of one of the divided nut part in a state of fixed fittings.

2. The divided nut as claimed in claim 1 further comprising:
belt-like connecting means for integrally connecting a side of the facing side of- each of the divided nut parts.

3. The divided nut as claimed in claim 2 wherein the fitting projection means are provided to project in parallel to each other from a center of both sides of the engaging side interposing the screw hole of semicircle to project and constructed to be bendable inward and outward directions, and a space between the engaging pawl means is formed to be slightly wide comparing with a width of the groove means formed with the both sides of the facing connecting side of the other divided nut part.

4. A divided nut comprising:
two divided nut parts of plastics divided along a direction of an axis of the screw hole of the divided nut and connected to each other with a side of each thereof facing to each other, bendable belt-like connecting means for integrally connecting an outer end portion of the divided sides of the divided nut parts, a pair of parallel holding projections projecting from both outer ends of the screw hole of semicircle formed with the divided side the divided nut part elastically in inward and outward directions so as to be elastically deformable, engaging pawl means provided with an inside of a tip of the holding projection means, engaging projection means formed with a center portion of both outer ends of the screw hole of semicircle on the divided side of the other divided nut part and having a thickness greater than a space between the engaging pawls of the holding projections, and engaging step means provided with both sides of the engaging projection means to be engaged between the engaging pawl means in a state of fixed fittings.

5. The divided nut as claimed in claim 4 wherein the belt-like connecting means include a bending portion at a position shifted adjacent the divided nut part which provides the holding projection means, so as to fit the divided nut part in the other divided nut part.

6. The divided nut as claimed in claim 5 wherein the engaging pawl means of the holding projection means of the divided nut part provide inclined engaging sides which incline rearwardly from the base of the engaging pawl means to a tip thereof.