JPH0614661U - Cleat - Google Patents

Abstract

(57) [Abstract] [Purpose] A bolt 18 whose elastic member has a predetermined compression amount,
With the screw-in length of 18, the rotation of the bolt is restricted by the reaction force against the rotation torque, thus providing the cleat with which the cable 12 can be held and fixed with a predetermined elasticity. [Structure] Bottomed cylindrical portions 14 provided on both sides of the pressing member 14
The saw-toothed first engaging protrusions 14d, 14d, ... Are provided on the opening end faces of the b, 14b, and the right end sides thereof are contact faces 14e, 14e ,. . The coil springs 16 and 16 are inserted into the bottomed cylindrical portions 14b and 14b, and the bolts 18 and 18 are inserted through the coil springs 16 and 16 from the opening side to fix the fixing member 1.
0 screw holes 10c, 10c. Bolt 18,
The head of 18 is provided with second engaging protrusions 18b, 18b, ... Having a contact surface 18c, 18c ,.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cleat that holds and fixes a cable by a predetermined elastic force obtained by compressing an elastic member. With a simple structure, the screwing length of a bolt is regulated so that the elastic member has a predetermined compression amount. It is related to the cleat.

[0002]

[Prior art]

 The outer diameter of the cable changes, although slightly, due to changes in ambient temperature. It is desirable that the cleat that holds and fixes this cable can always fix it with a substantially constant tightening force even if the outer diameter of the cable changes.

Therefore, the applicant of the present invention has previously proposed a technique shown in Japanese Utility Model Laid-Open No. 3-83430 in which a cable is held and fixed by the elasticity of a coil spring. In order to easily set the elastic force of the coil spring to a predetermined set value, the size into which the bolt or nut can be screwed is defined by a cylindrical body having a predetermined length in the axial direction or a step provided on the bolt.

Further, as another technique for setting the elasticity of the coil spring to a predetermined set value, the applicant of the present invention has proposed an axial force regulation fastener shown in Japanese Patent Publication No. 4-20090. This is a nut configured to spin against a bolt when a certain axial force is reached.

[0005]

[Problems to be solved by the device]

 In the technology proposed in Japanese Utility Model Laid-Open No. 3-83430, the screwing length of the bolt is regulated by the cylinder inserted into the bolt, or the screwing length of the nut is controlled by the step portion provided on the bolt. By restricting the amount of compression of the coil spring, the cleat can be held and fixed with a predetermined elasticity by a simple structure. However, the regulation of the screw-in length of such bolts or nuts causes an excessive force in the axial direction due to the wedge effect on the rotating torque that rotates the bolts or nuts, and it is easy to damage the regulating cylinder. It is easy to cause damage to the threads.

In the technique proposed in Japanese Examined Patent Publication No. 4-20090, the axial force of the fastener can be managed accurately, but a nut member having a special structure is required.

The present invention was made in order to solve the problems of the technique previously proposed by the applicant of the present invention, and has a simple structure in which a bolt is screwed into a predetermined position in the axial direction. Then, the rotation of the bolt is restricted by the reaction force against this rotation torque, and it is an object of the invention to provide a cleat capable of holding and fixing the cable with a predetermined elasticity.

[0008]

[Means for Solving the Problems]

 In order to achieve such an object, the cleat of the present invention is provided with bottomed cylinders having openings on opposite sides of the fixing member on both sides of the cable of the pressing member, and these bottomed cylinders are provided. One or a plurality of first engaging projections are provided in the opening of the portion, and through holes are formed in the bottom respectively, 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, the elastic member and the through hole are penetrated, and bolts are respectively screwed into the screw holes from the opening side, and the first engaging protrusion is attached to the head of the bolt. Is provided with one or a plurality of second engaging projections, the abutting surfaces of the first and second engaging projections being substantially parallel to the axial direction of the bolt, and the first and second engaging projections. The two are configured so that they can move axially relative to each other while the engaging projections of To have.

The first and second engagement protrusions are saw-toothed when viewed from the side, and the angle formed by the surface orthogonal to the axial direction of the bolt and the saw-toothed slope is the lead angle of the bolt. It may be configured to be larger or equal.

Further, the first and second engaging protrusions are quadrilaterals in which the apex adjacent to the contact surface is a sloping surface when viewed from the side, and the sloping surface and the surface orthogonal to the axial direction of the bolt. It is also possible that the angle formed by is slightly larger than or equal to the lead angle of the bolt, and that the first and second engaging projections can mesh with each other in the axial direction.

[0011]

[Work]

 As the bolt is screwed in, the contact surface of the second engaging projection provided on the head of the bolt is attached to the front end of the contact surface of the first engaging projection of the bottomed tubular portion of the pressing member. Are abutted against each other and the screwing of the bolt is restricted by the reaction force against the rotating torque. Then, the elastic member is compressed by a predetermined amount, and the cable is sandwiched and fixed by the fixing member and the pressing member with 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 proper elasticity is maintained even if the cable expands and contracts.

If the first and second engaging protrusions are saw-toothed and the angle formed by the slopes is larger or equal to the lead angle, the second engaging protrusions are screwed in. The apex of the raised saw tooth moves spirally, but since the angle of the inclined surface is larger than or equal to the lead angle, the apexes of the first and second engaging protrusions do not abut on other inclined surfaces. Only the contact surface of the second engaging protrusion can contact the contact surface of the first engaging protrusion.

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

[0014]

【Example】

 Hereinafter, a first embodiment of the cleat of the present invention will be described with reference to FIGS. FIG. 1 is a partially sectional front view of the first embodiment of the cleat of the present invention, FIG. 2 is an external perspective view of an opening portion of a bottomed tubular portion in FIG. 1, and FIG. It is a figure for demonstrating contact | abutting of the 1st and 2nd engaging protrusion in FIG.

1 to 3, the fixing member 10 has a base portion fixed to a fixed object (not shown) such as a building or a cable tray, and a semi-cylindrical recess 10a for mounting the cable 12 at the center of the upper portion thereof. And the arms 10b and 10b are extended on both sides of the recess 10a. The pressing member 14 has a semi-cylindrical recess 14a formed in the center of the lower part thereof so as to straddle the cable 12, and a bottomed cylinder with openings on both sides of the recess 14a facing upward from the fixing member 10. The parts 14b and 14b are integrally provided. Through holes 14c, 14c are formed at the centers of the bottoms of the bottomed cylindrical portions 14b, 14b, and screw holes 10c, 10c are formed in the arms 10b, 10b of the fixing member 10 in correspondence with these through holes 14c, 14c. Engraved.

On the open end faces of the bottomed cylindrical portions 14b, 14b, four sawtooth-shaped first engaging projections 14d, 14d, ... Are provided on concentric circles evenly divided. If the screw holes 10c, 10c are right-handed screws, the first engaging protrusions 14d, 14d, ... Are arranged such that the right end side of the sawtooth-shaped triangular ridge is parallel to the axial direction of the screw holes 10c, 10c (for example, Abutment surfaces 14e, 14e, ... Are formed on a plane including the central axis of the screw, and slopes 14f, 14f ,. The angle θ formed between the inclined surfaces 14f, 14f, ... And the surface orthogonal to the axial direction is formed larger or equal to the lead angle β of the screw holes 10c, 10c. Here, the lead angle β means the angle formed by the helical winding of the screw thread and the plane perpendicular to the axis of the screw passing through one point on the lead, and the lead (in the axial direction when making one revolution around the axis) The lead angle β is given by tan β = L / πD, where L is the distance traveled and D is the diameter of the screw at that point.

Coil springs 16 and 16 as elastic members are inserted into the bottomed cylindrical portions 14b and 14b, and penetrate the coil springs 16 and 16 and the through holes 14c and 14c from the opening side to the bolts 18 and 18. Is screwed into the screw holes 10c, 10c. The head ends of the bolts 18, 18 are formed in a flat hexagon so that the bolts 18, 18 can be easily rotated by a tool. Further, outer peripheral flange portions 18a, 18a substantially equal to the outer diameters of the bottomed cylindrical portions 14b, 14b are formed in the lower portion of the flat hexagonal portion, and the first engaging protrusions 14d, 14d, ... Are formed on the lower surface of the outer peripheral portion. Are provided on the concentric circles of equal division so as to face the ... These second engaging projections 18b, 18b ... Form abutting surfaces 18c, 18c ... Which are parallel to the axial direction on the left end side of the sawtooth triangular mountain, and slopes 18d, 18d ,. It is formed. The angle θ ′ formed by the inclined surfaces 18d, 18d, ... And the surface orthogonal to the axial direction is formed to be larger than or equal to the lead angle β of the screw holes 10c, 10c. Here, the angles θ and θ ′ formed by the slopes 14f, 14f, ..., 18d, 18d, ... Of the first and second engaging projections 14d, 14d ,. Is desirable, but may be different.

It should be noted that nuts 20 and 20 are screwed through washers to the tips of the bolts 18 and 18 which are screwed into and penetrate the screw holes 10c and 10c, so that the bolts 18 and 18 are securely fixed. It

In this structure, the cable 12 is placed in the recess 10a of the fixing member 10, the pressing member 14 is covered so as to straddle the cable 12, and the coil springs 16 and 16 are provided in the bottomed cylindrical portions 14b and 14b. Then, the bolts 18, 18 are passed through the coil springs 16, 16 and the through holes 14c, 14c and screwed into the screw holes 10c, 10c to be tightened. Then, the bolts 18, 18 move in the axial direction by the lead L in one rotation, and the first engaging protrusions 14d, 14d, ... And the second engaging protrusions 18b, 18b ,. Approach as shown by the solid line. Then, when the bolts 18, 18 are further rotated, as shown by the broken line in FIG. 3, the contact surfaces 14e of the first and second engaging protrusions 14d, 14d, ..., 18b, 18b ,. , 14e, ..., 18c, 18c, ... Abut, a reaction force is generated with respect to the rotational torque, and the rotation is restricted, so that the screw-in length of the bolt is restricted.

Here, as shown by the solid line in FIG. 3, the tops of the sawtooth-shaped triangles of the first engaging protrusions 14d, 14d, ... Are the sawteeth of the second engaging protrusions 18b, 18b ,. If the bolts 18, 18 rotate without coming into contact with the apex of the triangular shape, the apex of the triangle of the second engaging projections 18b, 18b, ... Spirals at the lead angle β of the screw holes 10c, 10c. Draw and move. However, the angle θ of the slopes 14f, 14f of the first engaging protrusions 14d, 14d, ... And the angle θ ′ of the slopes 18d, 18d of the second engaging protrusions 18b, 18b. Since they are formed to be larger than or equal to the angle β, the tops of the respective triangles do not abut against the slopes 14f, 14f, ..., 18d, 18d ,. Each of the first and second engaging protrusions 14d, 14d, ..., 18b, 18b, .. , The first and second engaging protrusions 14d, 14d, ..., 18b, 18b, .. may move axially by L / 4 and come into contact with each other. Therefore, the variation in the compression amount of the coil springs 16 and 16 is within the range of 1/4 of the lead L. In this state, that is, when the first and second engaging projections 14d, 14d, ..., 18b, 18b, .. are in contact with each other, the nuts 20, 20 are tightened to securely fix the bolts 18, 18. good.

In this way, with the bolts 18, 18 screwed in and fixed by a predetermined length, the first and second engagement protrusions 14d, 14d, ..., 18b, 18b ,. If the height of the saw-toothed triangle is d, and the height d is sufficiently larger than L / 4, the contact surfaces 14e, 14e, ..., 18c, 18c ,. , The first and second engaging protrusions 14d, 14d, ..., 18b, 18b, ... Can move relative to each other in the axial direction. Therefore, when the outer diameter of the cable 12 expands due to heat change, the coil springs 16 and 16 are further compressed, and the bottomed tubular portions 14b and 14b can approach the heads of the bolts 18 and 18. Further, when the outer diameter of the cable 12 contracts, the compression of the coil springs 16 and 16 is reduced and the bottomed cylindrical portions 14b and 14b can be separated from the heads of the bolts 18 and 18. Therefore, 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 by the elastic force of the coil springs 16 and 16 with a substantially constant force. The elastic force is defined by the first and second engaging protrusions 14d, 14, ..., 18b, 18b, ..., The tightening length of the bolts 18, 18 is easily and easily set to a predetermined value. Is set to.

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

In FIG. 4 and FIG. 5, a plurality of quadrilateral first engaging protrusions 24, 24, ... Seen from the side surface are equally divided at the opening end faces of the bottomed cylindrical portions 14 b, 14 b of the pressing member 14. Are provided on concentric circles. The contact surfaces 24a, 24a, ... On the right end sides of the first engaging projections 24, 24, ... Are surfaces parallel to the axial direction and are adjacent to these contact surfaces 24a, 24a ,. Slopes 24b, 24b, ... Forming an angle .theta. Formed by a plane perpendicular to the axial direction of the bolt 18 to be equal to or slightly larger than the lead angle .beta.

A plurality of second engaging protrusions 28, 28 are provided on the lower surfaces of the outer peripheral portions of the collar portions 18 a, 18 a of the bolts 18, 18 so as to face the first engaging protrusions 24, 24 ,. , ... are provided on concentric circles with equal division. The contact surfaces 28a, 28a, ... on the left end side of these second engaging projections 28, 28, ... Are surfaces parallel to the axial direction, and are adjacent to these contact surfaces 28a, 28a ,. Slopes 28b, 28b, ... Are formed on the top side at an angle θ equal to or slightly larger than the lead angle β. The first and second engaging projections 24, 24, ..., 28, 28, ... Are formed so as to be axially meshable with each other.

In such a configuration, if N (N is an integer) pieces of the first and second engaging projections 24, 24, ..., 28, 28 ,. Similarly, the compression amounts of the coil springs 16 and 16 can be set with the variation within the range of L / N. Moreover, the angles formed by the contact surfaces 24a, 24a, ..., 28a, 28a, ... And the slopes 24b, 24b, .., 28b, 28b, ... Are close to a right angle, and the structural strength of the ridge is high. Become.

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 essential parts of an opening portion of a bottomed tubular portion and a flange portion of a bolt in a third embodiment of the cleat of the present invention. 6, members that are the same as or equivalent to those in FIGS. 1 to 5 are given the same reference numerals and redundant description is omitted.

In the structure shown in FIG. 6, the first engaging projections 34, 34, ... Are equally divided into the same circle on the inner peripheral surface of the opening of the bottomed cylindrical portion 14 b, 14 c of the pressing member 14. It is provided on the circumference. .. and contact surfaces 34a, 34a, .. and slopes 34b, 34b .. are formed in the same manner as in the first and second embodiments. Further, the outer diameters of the collar portions 18a, 18a of the bolts 18, 18 are made slightly smaller than the diameter formed on the inner side surfaces of the first engaging projections 34, 34, ... The second engaging protrusions 38, 38, ... Are equally divided so as to form a concentric circle with the circle of the engaging protrusions 34, 34 ,. .. and slopes 38b, 38b, .. are also formed on these second engaging projections 38, 38 ,.

Even with this configuration, the contact surfaces 34a, 34a, ..., 38a, 38a, ... Of the first and second engaging protrusions 34, 34 ,. By abutting each other, the rotation of the bolt 18 is restricted and the screwing length is regulated, so that the compression amount of the coil spring 16 can be set to a predetermined value.

In the above embodiment, four first and second engaging protrusions are provided by equal division, but the present invention is not limited to this and one or more engaging protrusions may be provided. Good. If the number of the first and second engaging protrusions is one, the variation in the compression amount of the coil spring is the dimension L of one lead of the screw at the maximum. Further, the numbers of the first and second engaging protrusions may be different, and if the least common multiple of the two numbers is M, the variation in the compression amount of the coil spring is L / M. Further, one of the first and second engaging protrusions may be one, and the other may be provided in plural. Furthermore, the shapes of the first and second engaging projections are not limited to those in the above embodiment, but can be variously modified. Moreover, the first engaging protrusion provided on either the open end surface of the bottomed tubular portion or the inner peripheral surface of the opening portion and the lower surface or outer peripheral surface of the outer peripheral portion of the collar portion of the bolt are provided. Any combination may be used as long as the second engaging projections are appropriately brought into contact with each other.

Further, the elastic member is not limited to the coil spring, but may be a cylindrical bamboo child spring, a plurality of disc springs stacked together, a cylindrical rubber member, or the like.

Further, in the above-mentioned embodiment, the flange portion is integrally formed with the bolt, but the present invention is not limited to this, and the separately formed ones are substantially integrated by an appropriate means such as a key. Is also good. Further, it is sufficient for the bolt to be easily rotated around the axis, and the bolt is not limited to the one having a flat hexagonal member formed at the tip of the head. Further, the flat hexagonal member at the tip of the head of the bolt may be made large, and the second engaging projection may be directly provided on this member.

Then, instead of the 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 bored, and one end of the nut is embedded in the arm to rotate around the shaft. The screw holes may be provided so as not to rotate. In addition, a double nut may be screwed on the tip of the bolt that penetrates the through hole to fix the screwing length of the bolt without embedding the nut. In such a configuration, the first-stage nut may be appropriately fixed so as not to rotate about the axis, and the bolt may be rotated about the axis and tightened.

Furthermore, the contact surfaces of the first and second engaging protrusions need not be exactly parallel to the axial direction in practical use. This is because when the first and second engaging projections come into contact with each other by screwing in the bolts, they are rotated in slightly opposite directions and a gap is provided between the abutting surfaces to press against the bolt. This is because the member can be structured to be movable in the axial direction. Also, in the case where the fixing member does not have a screw hole and a double nut is used as a through hole to fix the screwing length of the bolt, the force that moves the pressing member in the axial direction causes the bolt and the double nut to move. This is because the shaft can be slightly rotated around the axis to allow the axial movement of the pressing member.

[0034]

[Effect of device]

 As described above, since the cleat of the present invention is configured, it has the following special effects.

In the cleat of the present invention, when the bolt is screwed in, the first engaging projection provided on the opening of the bottomed tubular portion and the second engaging projection provided on the bolt are brought into contact with each other. Is regulated by the reaction force of the rotating torque, so that the rotation of the bolt is regulated without generating an excessive force in the axial direction. Therefore, an excessive force does not act on each component, there is no fear of damage, and the component can be repeatedly used. Further, since the screwing length of the bolt is defined by a predetermined value, the compression amount of the elastic member becomes a predetermined value, and the elasticity for holding and fixing the cable can be easily and easily set to an appropriate value.

[Brief description of drawings]

FIG. 1 is a partially sectional front view of a first embodiment of the cleat of the present invention.

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

FIG. 3 is a diagram for explaining contact between the first and second engaging protrusions in FIG.

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

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

FIG. 6 is an exploded perspective view of essential parts of an opening portion of a bottomed tubular portion and a flange portion of a bolt in a third embodiment of the cleat of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Fixing member 10c Screw hole 12 Cable 14 Pressing member 14b Bottomed cylinder part 14c Through hole 14d, 24, 34 1st engaging protrusion 14e, 18c, 24a, 28a, 34a, 38a
Abutment surface 14f, 18d, 24b, 28b, 34b, 38b
Slope 16 Coil spring 18 Bolt 18a Collar 18b, 28, 38 Second engaging protrusion θ, θ'Angle formed by a plane orthogonal to the axial direction and the slope

Claims (5)

[Scope of utility model registration request] 1. A cleat for holding and fixing a cable by a fixing member and a pressing member, wherein bottomed cylindrical portions having openings on the opposite side to the fixing member are provided on both sides of the pressing member with the cable interposed therebetween. One or a plurality of first engaging protrusions are provided in the opening of the bottomed tubular portion, and through holes are provided in the bottom respectively, and screw holes are provided in the fixing member corresponding to the through holes, respectively. Inserting an elastic member into the bottomed tubular portion, penetrating the elastic member and the through hole, and screwing bolts into the screw hole from the opening side,
The head of the bolt may abut the first engaging protrusion 1
One or a plurality of second engagement protrusions are provided, and the first and second
The contact surface of the engaging projection is substantially parallel to the axial direction of the bolt, and both are relatively movable in the axial direction with the first and second engaging projections in contact with each other. A cleat that is characterized by what you have done. 2. The cleat according to claim 1, wherein the first and second engaging protrusions are saw-toothed when viewed from a side surface, and the surface orthogonal to the axial direction of the bolt and the saw-toothed 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 are quadrilaterals whose apex adjacent to the abutting surface is an inclined surface when viewed from a side surface, and the shaft of the bolt. The angle formed between the surface orthogonal to the direction and the inclined surface is slightly larger than or equal to the lead angle of the bolt, and the first and second engagement projections can be meshed in the axial direction. Cleats characterized by. 4. The cleat according to claim 1, wherein the first engaging projection is provided on an opening end surface of the bottomed tubular portion or an inner peripheral surface of the opening portion. Cleat to do. 5. The cleat according to any one of claims 1 to 3, wherein the second engagement protrusion is a bottom surface of the head portion of the bolt or a flange portion provided on the head portion on the bottomed tubular portion side, or Cleats characterized by being provided on the outer peripheral surface.