JP2558177Y2 - Cleat - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleat for holding and fixing a cable by a predetermined elastic force obtained by compressing an elastic member. The present invention relates to a cleat in which a screwing length is regulated.

[0002]

2. Description of the Related Art The outer diameter of a cable changes slightly due to a change in ambient temperature or the like. It is desirable that the cleat for clamping and fixing the cable can always be fixed with a substantially constant tightening force even if the outer diameter of the cable changes.

[0003] The applicant of the present invention has previously reported that
No. 83430 has proposed a technique for holding and fixing a cable by the elastic force of a coil spring. In this method, a dimension in which a bolt or a nut can be screwed is defined by a step provided on a cylindrical body or a bolt having a predetermined length in the axial direction so that the elasticity of the coil spring can be easily set to a predetermined value.

As another technique for setting the elasticity of a coil spring to a predetermined set value, the present applicant has disclosed in Japanese Patent Publication No.
No. 090 proposes an axial force regulating fastener. This is a nut configured to spin on the bolt when a predetermined axial force is reached.

[0005]

[Problem to be solved by the present invention]
According to the technique proposed in No. 30, the length of screwing of the bolt is regulated by a cylinder fitted into the bolt, or the length of screwing of the nut is regulated by a step provided on the bolt. The amount of compression of the spring is specified, and the cleat can be clamped and fixed with a predetermined elasticity by a simple structure. However, the regulation of the screw-in length of the bolt or the nut causes an excessive force in the axial direction due to a wedge effect with respect to the rotational torque for rotating the bolt or the nut, so that the cylinder body for the regulation is easily damaged, Or it is easy to cause breakage of the thread.

In the technique proposed in Japanese Patent Publication No. Hei 4-20090, although the axial force of the fastener can be reliably controlled, a nut member having a special structure is required.

The present invention has been made to solve the above-mentioned problems of the technology proposed by the present applicant, and has a simple structure, in which a bolt is screwed in so that a predetermined position in the axial direction can be obtained. Then, an object of the present invention is to provide a cleat in which the rotation of the bolt is restricted by a reaction force against the rotation torque, and the cable can be clamped and fixed with a predetermined elasticity.

[0008]

In order to achieve the above object, a cleat of the present invention comprises a bottomed tubular portion having openings on both sides of the pressing member opposite to the fixing member with the cable interposed therebetween. And one or more first engagement protrusions are provided in the openings of these bottomed cylindrical portions, and through holes are respectively formed in the bottom portions, and screw holes are formed in the fixing member corresponding to the through holes. The elastic member is inserted into the bottomed cylindrical portion, a bolt is screwed into the screw hole from the opening side through the elastic member and the through hole, and the first bolt is inserted into the head of the bolt. One or a plurality of second engagement projections that can abut the engagement projections of the first and second engagement projections, wherein the contact surfaces of the first and second engagement projections are substantially parallel to the axial direction of the bolt, and Relatively move in the axial direction with the second engagement protrusion in contact with the And it is configured to be a resident.

The first and second engaging projections are serrated when viewed from the side, and the angle between a surface perpendicular to the axial direction of the bolt and the serrated slope is the lead angle of the bolt. It may be configured to be larger or equal.

Further, the first and second engaging projections have a quadrilateral shape in which the top side adjacent to the contact surface forms a slope when viewed from the side, and a surface perpendicular to the axial direction of the bolt and the slope are formed. The angle between the first and second engagement projections may be slightly larger or equal to the lead angle of the bolt, and the first and second engagement projections may be engaged in the axial direction.

[0011]

[Operation] When the bolt is screwed in, the second engaging projection provided on the head of the bolt is attached to the tip of the contact surface of the first engaging projection of the bottomed cylindrical portion of the pressing member. When the contact surfaces come into contact with each other, the screwing of the bolt is restricted by the reaction force against the rotational torque. Then, the elastic member is compressed by a predetermined amount, and the cable is clamped and fixed between the fixing member and the pressing member with an appropriate elasticity.
Moreover, the contact surface is substantially parallel to the axial direction, the pressing member can move relative to the bolt in the axial direction, and the appropriate elasticity is maintained even when the cable expands and contracts.

If the first and second engaging projections are formed in a saw-tooth shape, and the angle between the slopes is made larger or equal to the lead angle, the second engaging projection is screwed into the second engaging projection. Although the serrated vertex moves in a spiral shape, since the angle of the slope is larger or equal to the lead angle, the vertices of the first and second engaging projections do not abut each other on the other slope, and the second Only the contact surface of the engagement protrusion can contact the contact surface of the first engagement protrusion.

Further, if the first and second engaging projections are quadrilaterals whose apex adjacent to the contact surface forms a slope, and the angle formed by the slope is slightly larger or equal to the lead angle. The angle formed between the contact surface and the inclined surface is substantially a right angle, and the structural strength of the ridge of the contact surface can be increased.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the cleat of the present invention will be described with reference to FIGS. FIG. 1 is a front view of a first embodiment of the cleat of the present invention, which is a partial cross section, FIG. 2 is an external perspective view of an opening portion of a bottomed cylindrical portion in FIG. 1, and FIG. FIG. 2 is a diagram for explaining contact between first and second engagement protrusions in FIG. 1.

1 to 3, a fixing member 10 has a base fixed to a fixed object (not shown) such as a building or a cable tray, and a semi-cylindrical concave portion 10a in which a cable 12 is placed at the upper center thereof. Is formed, and the recess 10a is formed.
Arms 10b, 10b are extended on both sides of the arm. And
The pressing member 14 has a semi-cylindrical concave portion 14a formed in the lower center thereof so as to straddle the cable 12, and has a bottomed cylindrical portion 14b having openings on both sides of the concave portion 14a facing upward on the side opposite to the fixing member 10. , 14b are provided integrally.
A through hole 14 is formed at the center of the bottom of the bottomed cylindrical portions 14b, 14b.
c, 14c are formed, and screw holes 10c, 10c are formed in the arms 10b, 10b of the fixing member 10 corresponding to the through holes 14c, 14c.

The four first engaging projections 14d, 14 each having a sawtooth shape as viewed from the side face are formed on the open end faces of the bottomed cylindrical portions 14b, 14b.
.. are provided on concentric circles of equal division. These first engagement projections 14d, 14d,...
If c and 10c are right-handed threads, the right end sides of the sawtooth-shaped triangular ridges are parallel to the axial direction of the screw holes 10c and 10c (for example, in a plane including the center axis of the screw). …
Are formed, and slopes 14f, 14f,... Are formed on the left side. The angle θ between the slopes 14f, 14f,... And the plane orthogonal to the axial direction is equal to the screw holes 10c, 10c.
c is larger or equal to the lead angle β of c. Here, the lead angle β refers to an angle between a helical winding of a screw thread and a plane perpendicular to the axis of the screw passing through one point on the helical winding,
Assuming that the lead (the distance traveled in the axial direction when making one round around the axis) is L and the diameter of the screw at that point is D, the lead angle β is represented by tanβ = L / πD.

Then, coil springs 16, 16 as elastic members are inserted into the bottomed cylindrical portions 14b, 14b, and the bolts 18, 18 penetrate through the coil springs 16, 16 and the through holes 14c, 14c from the opening side. Are screwed into the screw holes 10c. The tips of the heads of the bolts 18, 18 are formed in a flat hexagon so that the bolts 18, 18 can be easily rotated with a tool. Further, flanges 18a, 18a having an outer periphery substantially equal to the outer diameter of the bottomed cylindrical portions 14b, 14b are formed below the flat hexagonal portion, and first engagement protrusions 14d, 14d,. , Four serrated second engagement projections 18b are provided on concentric circles of equal division. The second engagement protrusions 18b, 18b,... Have contact surfaces 18c, 18c,... Parallel to the axial direction on the left end side of the sawtooth triangular ridge, and slopes 18d, 18d,. It is formed. An angle θ ′ formed between the inclined surfaces 18d, 18d,... And a surface orthogonal to the axial direction is formed to be larger than or equal to the lead angle β of the screw holes 10c. Here, the angle θ formed by the slopes 14f, 14f,..., 18d, 18d,... Of the first and second engagement protrusions 14d, 14d,. Is desirable, but may be different.

Incidentally, nuts 20, 20 are screwed into front ends of the bolts 18, 18 which are screwed into the screw holes 10c, 10c through washers, and the bolts 18, 18 are securely fixed. You.

In such a configuration, the cable 12 is placed in the concave portion 10a of the fixing member 10, and the pressing member 14 is put over the cable 12 so as to straddle the cable 12.
Into the bottomed cylindrical portions 14b, 14b,
8, 18 are replaced with coil springs 16, 16 and through holes 14c, 14c.
And screwed into the screw holes 10c, 10c. Then, the bolts 18, 18 advance in the axial direction by the lead L in one rotation, and the first engagement protrusions 14d, 14d,.
The second engaging projections 18b, 18b,... Approach as shown by the solid line in FIG. When the bolts 18 are further rotated, as shown by broken lines in FIG. 3, the first and second engagement projections 14d, 14d,..., 18b, 18b,
Each of the contact surfaces 14e, 14e,.
, 18c,... abut against each other, a reaction force is generated against the rotational torque, and the rotation is restricted, whereby the screwing length of the bolt is restricted.

Here, as shown by a solid line in FIG. 3, the top of the triangular sawtooth of the first engaging projections 14d, 14d,... Is the sawtooth of the second engaging projections 18b, 18b,. If the bolts 18, 18 rotate without contacting the tops of the triangles, the tops of the second engagement projections 18b, 18b,... Spiral at the angle of the lead angle β of the screw holes 10c, 10c. Draw and move. However, the first engagement protrusion 14
, 14d,... of the second engaging projections 18b, 18b,.
Are formed to be greater than or equal to the lead angle β, the tops of the respective triangles are mutually sloped 14f, 14f,..., 18d, 18d,.
There is no contact with ... Since the first and second engagement projections 14d, 14d,..., 18b, 18b,.
.., 18b, 18b,..., L /
There is a possibility of moving and approaching in the axial direction by four. Therefore, the variation in the amount of compression of the coil springs 16 and 16 is within the range of １ ／ of the lead L. In this state, that is, the first and second engagement protrusions 14d, 14d,.
8b, 18b,...
Should be securely fixed to the bolts 18.

In this manner, with the bolts 18, 18 screwed in a predetermined length and fixed, the first and second engagement projections 14d, 14d,..., 18b, 18b,. Let the height of the sawtooth triangle be d, and if the height d is sufficiently larger than L / 4, both contact surfaces 14e, 14e,.
, 18c, 18c,... Are parallel to the axial direction,
And second engagement projections 14d, 14d,..., 18b, 18
are relatively movable in the axial direction. Therefore, when the outer diameter of the cable 12 expands due to a thermal change, the coil springs 16, 16 are further compressed and the bottomed cylindrical portions 14b, 14b
Can access the heads of the bolts 18. When the outer diameter of the cable 12 shrinks, the coil spring 16,
The compression of the base 16 can be reduced so that the bottomed cylindrical portions 14b, 14b can be separated from the heads of the bolts 18, 18. Accordingly, the pressing member 14 can move in the axial direction in response to the expansion and contraction of the cable 12, and the cable 12 is clamped and fixed with a substantially constant force by the elastic force of the coil springs 16, 16. And
The elasticity is such that the tightening lengths of the bolts 18 are the first and second engagement protrusions 14d, 14,..., 18b, 18b,
.. Are set to predetermined values easily and easily.

Next, a second embodiment of the cleat of the present invention will be described with reference to FIGS. FIG. 4 is a front view of an essential part of an opening portion of a bottomed tubular portion in a second embodiment of the cleat of the present invention, and FIG. 5 is a diagram showing contact between the first and second engaging projections in FIG. It is a figure for explaining. 4 and 5, the same or equivalent members as those in FIGS. 1 to 3 are denoted by the same reference numerals, and redundant description will be omitted.

4 and 5, a plurality of first engaging projections 24, 24,..., Each having a quadrangular shape as viewed from the side, are equally divided on the open end surfaces of the bottomed cylindrical portions 14b, 14b of the pressing member 14. Are provided on concentric circles. These first engagement projections 2
The contact surfaces 24a, 24a,.
Are surfaces parallel to the axial direction, and these contact surfaces 24a, 2
The angle θ between the top side adjacent to 4a,... And the plane orthogonal to the axial direction of the bolt 18 is equal to or slightly larger than the lead angle β of the bolt 18.
Is formed.

The flanges 18a, 1 of the bolts 18, 18
8a, the first engagement protrusions 24, 24,
, A plurality of second engaging projections 28, 28,.
Are provided on concentric circles of equal division. The contact surfaces 28 on the left end sides of the second engagement protrusions 28, 28,.
are surfaces parallel to the axial direction, and the slopes 28 are formed on the apex adjacent to these abutment surfaces 28a, 28a,... at an angle θ equal to or slightly larger than the lead angle β.
, 28b,... are formed. The first and second engagement projections 24, 24, ..., 28, 28, ... are formed so as to be able to mesh with each other in the axial direction.

In this configuration, if N (N is an integer) number of first and second engagement projections 24, 24,..., 28, 28,. In the same way as
The amount of compression of the coil springs 16, 16 can be set by the variation within the range of L / N. Moreover, the contact surfaces 24a,
24a,..., 28a, 28a,.
, 28b, 28b,... Are close to a right angle, and the structural strength of the ridge is large.

Further, a third embodiment of the cleat of the present invention will be described with reference to FIG. FIG. 6 is a perspective exploded view of a main part of an opening portion of a bottomed cylindrical portion and a flange portion of a bolt in a third embodiment of the cleat of the present invention. 6, the same or equivalent members as those in FIGS. 1 to 5 are denoted by the same reference numerals, and redundant description will be omitted.

In the embodiment shown in FIG.
The first engagement protrusions 34, 34,... Are equally divided and provided on the same circumference on the inner peripheral surfaces of the openings of the bottomed cylindrical portions 14b, 14c. These first engagement projections 34, 34,...
Also, the contact surfaces 34a, 34a,.
are formed in the same manner as in the first and second embodiments. The outer diameters of the flanges 18a of the bolts 18, 18 are slightly smaller than the diameters formed on the inner surfaces of the first engagement protrusions 34, 34,. Protrusion 3
The second engaging projections 38, 38,... Are equally divided so as to form a concentric circle with the circles 4, 34,.
These second engagement protrusions 38, 38,...
8a, 38a, ... and slopes 38b, 38b, ... are formed.

Even in this configuration, the contact surfaces 34 of the first and second engagement projections 34, 34,..., 38, 38,.
a, 34a,..., 38a, 38a,... abut each other, the rotation of the bolt 18 is regulated, the screwing length is regulated, and the compression amount of the coil spring 16 can be set to a predetermined value.

In the above embodiment, the first and second
Are provided by four equally divided portions, but the present invention is not limited to this, and it is sufficient that at least one protrusion is provided. If the number of the first and second engagement projections is one, the variation in the compression amount of the coil spring is one screw maximum.
This is the lead dimension L. Further, the number of the first and second engagement projections may be different. If the least common multiple of the two numbers is M, the variation in the compression amount of the coil spring is L / L.
It becomes M. Furthermore, one of the first and second engagement protrusions may be one, and the other may be provided in plurality. Furthermore, the shapes of the first and second engagement projections are not limited to those in the above embodiment, but can be variously modified. In addition, the first engagement protrusion provided on either the opening end surface of the bottomed cylindrical portion or the inner peripheral surface of the opening, and the first engaging projection is provided on either the lower surface or the outer peripheral surface of the outer peripheral portion of the flange portion of the bolt. Any combination may be used as long as the second engagement projections are appropriately brought into contact with each other.

The elastic member is not limited to a coil spring.
It may be a cylindrical bamboo child spring or a stack of a plurality of disc springs, or a cylindrical rubber member.

Further, in the above embodiment, the flange is formed integrally with the bolt. However, the present invention is not limited to this, and the bolt formed separately may be substantially integrated by appropriate means such as a key. good. Further, the bolt may be easily rotated around the axis, and is not limited to a flat hexagonal member formed at the tip of the head. Furthermore, the flat hexagonal member at the head end of the bolt may be made large, and the second engagement protrusion may be directly provided on this member.

Then, instead of a screw hole formed in the arm itself of the fixing member, a through hole having an inner diameter larger than the outer diameter of the bolt is formed, and a nut is embedded in one end of the arm and rotated around the axis. It may be arranged so as not to be screwed.
Further, a double nut may be screwed into the tip of the bolt penetrating the through hole without fixing the nut, and the screwed length of the bolt may be fixed. In such a configuration, the first-stage nut may be appropriately fixed so as not to rotate around the axis, and the bolt may be rotated around the axis and tightened.

Further, the contact surfaces of the first and second engaging projections need not be strictly parallel to the axial direction in practical use.
This is because, when the first and second engagement projections come into contact with each other by the screwing of the bolt, the first and second engagement projections are slightly rotated in the opposite direction to provide a gap between the contact surfaces, so that the pressing member is pressed against the bolt. Can be configured to be movable in the axial direction. Also, in the case where the screwing length of the bolt is fixed by a double nut as a through hole without engraving a screw hole in the fixing member, the bolt and the double nut are moved by the force to move the pressing member in the axial direction. This is because the pressing member can be slightly rotated around the axis to allow the axial movement of the pressing member.

[0034]

[Effects of the Invention] As described above, since the cleat of the present invention is constituted, the following special effects can be obtained.

In the cleat of the present invention, the bolt is screwed into contact with the first engagement projection provided on the opening of the bottomed cylindrical portion and the second engagement projection provided on the bolt. Therefore, the rotation of the bolt is regulated without causing an excessive force in the axial direction. Therefore, no excessive force acts on each component, there is no risk of breakage, etc., and it can be used repeatedly. Since the screwing length of the bolt is defined by the predetermined value, the compression amount of the elastic member becomes a predetermined value, and the elasticity for clamping and fixing the cable can be easily and easily set to an appropriate value.

[Brief description of the drawings]

FIG. 1 is a front view, partially in section, of a first embodiment of a cleat of the present invention.

FIG. 2 is an external perspective view of an opening portion of a bottomed cylindrical portion in FIG.

FIG. 3 is a view for explaining contact between first and second engagement protrusions in FIG. 1;

FIG. 4 is a front view of a main part of an opening part of a bottomed tubular part in a second embodiment of the cleat of the present invention.

FIG. 5 is a diagram for explaining contact between first and second engagement protrusions in FIG. 4;

FIG. 6 is a perspective exploded view of a main part of an opening portion of a bottomed cylindrical portion and a flange portion of a bolt in a third embodiment of the cleat of the present invention.

[Explanation of symbols]

Reference Signs List 10 fixing member 10c screw hole 12 cable 14 pressing member 14b bottomed cylindrical portion 14c through hole 14d, 24, 34 first engagement protrusion 14e, 18c, 24a, 28a, 34a, 38a
Contact surface 14f, 18d, 24b, 28b, 34b, 38b
Slope 16 Coil spring 18 Bolt 18a Flange 18b, 28, 38 Second engagement projection θ, θ 'Angle formed by a plane perpendicular to the axial direction and the slope

Claims (5)

(57) [Scope of request for utility model registration] In a cleat for holding and fixing a cable by a fixing member and a pressing member, bottomed tubular portions having openings on opposite sides of the fixing member are provided on both sides of the pressing member with the cable interposed therebetween. One or more first engaging projections are provided in the opening of the bottomed cylindrical portion and through holes are respectively formed in the bottom, and screw holes are provided in the fixing member corresponding to the through holes, respectively. An elastic member is inserted into the bottomed cylindrical portion, a bolt is screwed into the screw hole from the opening side through the elastic member and the through hole,
1 that can abut the first engagement protrusion on the head of the bolt
One or more second engagement projections, wherein the first and second engagement projections are provided.
The contact surfaces of the engaging projections are substantially parallel to the axial direction of the bolt, and the first and second engaging projections are relatively movable in the axial direction in a state of contact. A cleat characterized by the following. 2. The cleat according to claim 1, wherein the first and second engaging projections have a saw-tooth shape when viewed from a side surface, and a surface orthogonal to an axial direction of the bolt and the saw-tooth slope are formed. A cleat characterized in that the angle is larger or equal to the lead angle of the bolt. 3. The cleat according to claim 1, wherein the first and second engaging projections have a quadrilateral shape in which a top side adjacent to the contact surface forms a slope when viewed from a side, and the shaft of the bolt. The angle formed between the plane perpendicular to the direction and the slope is set to be slightly larger or equal to the lead angle of the bolt, and the first and second engagement protrusions can be engaged in the axial direction. A cleat characterized by: 4. The cleat according to claim 1, wherein the first engagement protrusion is provided on an opening end surface of the bottomed cylindrical portion or an inner peripheral surface of the opening. Cleat to do. 5. The cleat according to claim 1, wherein the second engagement protrusion is formed on a head of the bolt or on a lower surface of the flange provided on the head on the side of the bottomed cylindrical portion. A cleat provided on the outer peripheral surface.