JP2002020984A - Method for producing noiseproof cable having teeth - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing noiseproof cable having teeth by which the noiseproof cable having more superior noiseproof properties is produced without damaging the advantage of the operability and durability of the conventional noiseproof cable having the teeth. SOLUTION: This method for producing the noiseproof cable having the teeth comprises helically winding a tooth string 2 composed of a metal wire on the outer periphery of a core composed of the metal wire at a constant interval, adding an adhesive to the core dropwise, and helically and densely winding a tube 3 having a diameter larger than the tooth string and made of a synthetic resin or rubber between the wound tooth string.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for manufacturing a soundproof toothed cable. More specifically, the present invention relates to a method for manufacturing a soundproof toothed cable which is slidably housed in a conduit, is driven to be pushed and pulled by a gear or another toothed cable, and is used for opening and closing a sunroof of an automobile.

[0002]

2. Description of the Related Art As shown in FIG. 4, a general toothed cable is a tooth (coil) made of a metal wire and spirally wound at equal intervals around a core 101 with a gap around the core.
102. The core 101 is made of a stranded metal wire, and is usually a core wire 10 made of a metal wire.
3, a first winding layer 104 in which 4 to 6 metal wires are densely spirally wound around the outer periphery thereof, and a second winding layer in which 4 to 6 metal wires are further densely spirally wound around the periphery in a reverse order. Winding layer 10
5 and the third winding layer 106.

[0003] The toothed cable 107 configured as described above.
Are flexible and slidably received within the conduit and are driven in mesh with a gear or other toothed cable. A driven member is connected to the end or the middle thereof, and is used for remote control of opening / closing of a sunroof of an automobile, lifting / lowering of a window glass, and the like.

As the conduit, a flexible tube made of a metal spiral tube and a flexible tube made of a simple metal tube are used. In general, the conduits on the operation side and the passive side of the toothed cable are used. It is used by being curved between. Thus, the teeth of the toothed cable slide against the metal inner surface of the conduit, generating noise. In particular, at a curved portion of the conduit, the teeth are in discontinuous sliding contact with the inner surface of the conduit, so that the noise is large.

[0005] In order to suppress such noise, the applicant of the present invention has previously described a core made of a metal wire, a tooth made of a metal wire spirally wound around the outer peripheral surface of the core at equal intervals, and a gap between the tooth made of the metal wire. And a hollow elastic body whose outer surface protrudes outwardly from the outer surface of the tooth, has been proposed (see Japanese Utility Model Publication No. 58-13169).
In this case, the elastic body projecting outward at the straight portion slides on the inner surface of the conduit, so that the noise is reduced. Further, in a curved portion, the elastic body largely protrudes from the teeth, and thus there is an advantage that the soundproofing effect is further enhanced. If the hollow elastic body is removed at the portion where the teeth mesh with the gear, the meshing does not hinder the meshing.

[0006]

The above-mentioned conventional soundproof toothed cable has a sufficiently high soundproofing effect and a sufficient operability and durability. However, there has recently been a demand for quietness in the interior of automobiles of users. It is desired to further increase the soundproofing property. SUMMARY OF THE INVENTION An object of the present invention is to provide a method for manufacturing a soundproof toothed cable having even better soundproofness without impairing the operability and durability of the conventional soundproof toothed cable.

[0007]

According to a method of manufacturing a soundproof toothed cable according to the present invention, spirally winding teeth made of a metal wire at equal intervals around the outer peripheral surface of a core made of a metal wire, and applying an adhesive to the core. It is characterized in that a tube made of synthetic resin or rubber having a diameter larger than that of the teeth is spirally densely wound between the teeth. The outer diameter of the tube is 1.2 to 5 times the inner diameter,
The winding outer diameter of the tube is 1.01-1.
Preferably, it is one time. Further, the gap between adjacent teeth is preferably 0.9 to 1 times the outer diameter of the tube.

Preferably, the core is manufactured by providing at least one metal winding layer on a metal wire. Further, it is preferable that the tube is manufactured by extruding a thermoplastic resin or rubber.

[0009]

According to the method for manufacturing a toothed cable of the present invention, a toothed cable having low noise and high durability can be efficiently manufactured. Further, since the tube is adhered to the core with an adhesive, when the tube is subjected to an external force, it does not move between the teeth and is not significantly deformed.

The outer diameter of the tube is 1.2 to 5 times the inner diameter, and the outer diameter of the tube is 1.01 to 1.0 times the outer diameter of the tooth.
When it is 1.1 times, the tube is relatively thick, and the tube can sufficiently resist the sliding resistance by the conduit and the shearing force due to the movement of the core. Therefore, the durability is high. Also, since the outer diameter of the tube is within 5 times the inner diameter,
It has appropriate elasticity and flexibility. Therefore, even if the conduit is curved, it can slide smoothly.

In addition, since the outer diameter of the tube is 1.01 times or more the outer diameter of the tooth, the outer surface of the tube protrudes sufficiently from the outer surface of the tooth. Therefore, the sliding noise between the tooth and the conduit is suppressed. Further, since the winding outer diameter of the tube is 1.1 times or less the winding outer diameter of the tooth, the tooth reliably supports the shearing force applied to the tube. Thereby,
The elastic deformation due to the shearing force of the tube is suppressed to a small range, and the durability of the tube is improved.

When the gap between adjacent teeth is 0.9 to 1 times the outer diameter of the tube, the tube is elastically deformed vertically between the teeth when the tube is spirally wound around the gap between the teeth. While firmly fitting. Therefore, the adhesion between the tube and the teeth is high, and the tube does not slip on the core. Further, the teeth can more reliably support the shearing force of the tube. Further, since the tube is elastically deformed in the vertical direction, the tube sufficiently projects from the outer surface of the tooth.

[0013] At least one core is provided on the metal wire.
When manufacturing by providing a layer of metal winding layer,
The core has high flexibility and high tensile strength. When the tube is bonded to the surface of the core with an adhesive, when the tube receives an external force, it moves between the teeth,
No significant deformation. Therefore, the durability increases.

When the outer diameter of the soundproof cable is less than 3 mm, the strength is low, and when the outer diameter is more than 9 mm, the rigidity is high and it is difficult to bend.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a method for manufacturing a soundproof toothed cable according to the present invention will be described with reference to the drawings.
FIG. 1 is a side view of an essential part showing an embodiment of a soundproof toothed cable obtained by the manufacturing method of the present invention, FIG. 2 is a side view showing a use state of the soundproof toothed cable, and FIG. It is a flowchart showing one embodiment of a manufacturing method of a cable.

The toothed cable A shown in FIG. 1 has a core 1 made of a metal wire, teeth 2 spirally wound around the core 1 with a gap S therebetween, and spirally wound between the teeth 2. And a tube 3 made of a synthetic resin adhered thereto. The core 1 has a core wire 4 made of a metal wire and a first winding layer 5 made of 3 to 8 metal wires spirally wound around the core wire.
And a second winding layer 6 composed of 3 to 8 metal strands spirally wound around in the opposite direction. Three or more winding layers may be provided. Cord 4
For example, a hard steel wire, a piano wire, a spring steel wire or the like having a diameter of 0.4 to 1.0 mm is used. As the metal wires of the first winding layers 5 and 6, a spring steel wire having a diameter substantially equal to or somewhat smaller than that of the core wire 4 (for example, a diameter of 0.3 to 0.8 mm) is used. The diameter of the metal element wire of the second winding layer 6 is a hard steel wire, a piano wire, a spring steel wire or the like having a diameter similar to that of the core wire 4. The metal strands of the respective winding layers 5 and 6 are usually spirally wound without any gaps therebetween. The outer diameter of the core 1, that is, the winding outer diameter D1 of the second layer is, for example, 1.5 to
It is about 4.5 mm.

The tooth 2 is a metal wire, particularly a hard steel wire, a piano wire, a spring steel wire, or the like, and has a diameter d1 (for example, 0.1 to 0.8) of the outer diameter D1 of the core 1. 4 ~
(About 1.5 mm). The pitch P of the teeth 2 is the outer diameter d2 of the tube 3 in a natural state between the teeth 2.
Only a slightly smaller gap S is left, for example, 2
ピ ッ チ 3 mm pitch. The gap S at that time is about 0.9 to 1 times the outer diameter of the tube 3, preferably 0.92 to 1 times.
Preferably, it is about 0.96 times. Thus, the gap S
Is smaller than the outer diameter of the tube 3,
When the tube 3 is wound between the teeth 2, the tube 3
However, it is somewhat vertically elastically deformed, and strongly contacts the tooth 2 with a certain area. Thereby, the sliding resistance with the conduit applied to the tube 3 is reliably supported by the teeth 2.
The winding outer diameter D2 of the tooth 2 is 1.2 to 1.2 times the outer diameter D1 of the core 1.
About 2.5 times, especially about 1.4 to 2.0 times is preferable. Since the tooth 2 is tightly wound around the core 1, the winding outer diameter D2 of the tooth 2 is usually 0.1 to 1.10 times the diameter D1 of the core plus twice the diameter of the tooth 2. It becomes smaller by about 0 mm.

The tube 3 is made of a thermoplastic resin such as nylon, urethane, polyester or polyolefin or an elastomer thereof, silicone rubber, ethylene
An extruded product of rubber such as propylene rubber is used. Its hardness is about 30 to 80 Rockwell hardness, especially D40 to 6 for thermoplastic resin and its elastomer.
About 0 is preferable, and for rubber, Rockwell hardness A60 ~
About 90, especially about A70 to 90 is preferable. The outer diameter d2 of the tube 3 is preferably about the same as or slightly larger than the diameter of the teeth 2, that is, about 1 to 1.05 times.
However, even in the case of less than one time, if the gap between the teeth is made sufficiently small, the tube 3 elastically deformed thereby can be projected from the outer surface of the teeth 2. However, if the elastic deformation of the tube 3 is too large, sufficient distortion cannot be obtained even by heat treatment. For this reason, it is preferable to set it to 1 or more. On the other hand, if it exceeds 1.05 times, the tube 3 which receives the sliding resistance of the conduit receives a strong shearing force between the tube 3 and the teeth 2 and tends to have low durability.

The outer diameter d2 of the tube 3 is 1.2 times the inner diameter.
It is about 5 to about 5 times, and particularly preferably about 1.5 to 3 times. When the ratio is less than 1.2 times, the thickness of the tube is too thin, and the durability is low when the sliding resistance is strong. Also 5
If it exceeds twice, it becomes difficult to elastically deform, and the minimum radius of curvature of the toothed cable becomes large. Also, as described above, the gap S
Is smaller than the outer diameter of the tube 3, so that when the tube 3 is wound around the gap between the teeth 2, the tube is somewhat elongated in a sectional shape. And the winding outer diameter D2 of the tube 3
Is about 1.01 to 1.1 times the wound outer diameter D3 of the tooth. Therefore, the outer surface of the tube 3 protrudes from the outer surface of the tooth 2 by, for example, about 0.03 to 0.9 mm.

The toothed cable A configured as described above has flexibility and can transmit forces in both push and pull directions. This toothed cable A is used, for example, as shown in FIG. As the conduit 10, a conventionally known conduit can be used. Usually, the surface of the toothed cable A is previously coated with a lubricant such as grease. The conduit 10 has a bend 11 and partially the slit 1
2 is provided. The slit 12 has a toothed cable A
A connecting member 13 fixed in the middle is penetrated, and a driven member 14 is attached to the connecting member 13. Further, the geared cable A has a gear 15 driven by a motor M.
Are engaged.

In this motor, when the motor M rotates in one direction, the gear 15 rotates in the direction indicated by the solid arrow, and pushes the toothed cable A in the direction indicated by the arrow F. As a result, the toothed cable A slides in the conduit 10 in the direction of arrow F. Therefore, the driven member 14 is driven via the connecting member 13. Although the conduit 10 has the curved portion 11, the toothed cable A has flexibility, so that it can move along the axial direction while changing the direction by receiving the reaction force of the conduit 10 at the curved portion 11. When the gear 15 is rotated in the direction of the dashed arrow, the toothed cable A moves backward in the direction of the arrow R. Thereby, the driven member 1
4 can be pushed and pulled.

The toothed cable A in the conduit 10 has the outer surface of the tube 3 protruding from the outer surface of the tooth 2 as shown in FIG. No or strong sliding contact. Therefore, generation of noise is suppressed. Further, in the curved portion 11, the interval between the teeth 2 is narrowed radially inward, and the tube 3 therebetween further projects outward. Therefore, the effect of preventing noise for the toothed cable A and the inside of the curve is further exhibited.

Further, in the toothed cable A, since the outer diameter d2 of the tube 3 is larger than the gap S between the teeth 2 as a whole, the tube 3 is strongly fitted between the teeth 2. Therefore, the axial force (shearing force) of the cable applied to the tube 3 is sufficiently supported by the teeth 2, and the adhesive portion of the tube 3 to the core 1 is not easily peeled off. Therefore, the durability is high.

Next, an embodiment of a method for manufacturing the above-described toothed cable A will be described with reference to FIG. Core 1 and tooth 2
Is manufactured in advance by the same method as in the prior art, and the teeth 2 are spirally wound around the core 1 at a predetermined pitch by a winding machine or the like to manufacture a toothed cable 20 without a tube and wound on a drum. In addition, the tube 3 is also manufactured in a predetermined size by extrusion molding and wound up on a drum.

As shown in FIG. 3, first, the pitch of the tooth 2 is inspected by the pitch inspection device 22 while unwinding the above-described toothed cable 20 without a tube from the drum 21.
Next, the adhesive is dropped on the core 1 and the teeth 2 by the adhesive supply device 23. As the adhesive, an α-cyanoacrylate type or a hot melt type is used. Then, connect tube 3 to drum 2
The tube 3 is wound around the tooth 2 by the winding machine 25 immediately after the adhesive is dropped and supplied to the winding machine 25 while unwinding from the wire 4. At this time, the tube 3 is strongly fitted between the teeth 2 while applying a predetermined range of tension. When the tube 3 wound around the drum 24 is unwound, the tube 3 is slightly twisted, but the twist is minimized.

Further, even if the tube 3 is twisted at the time of winding, the elastic stress caused by the twist is reduced. After that, it is cut into a predetermined length by the cutting machine 26.

According to the above manufacturing method, the above-described toothed cable A can be manufactured continuously and efficiently.

In the above-described embodiment, the core 1 is provided with two winding layers around the core wire 4; however, three or more winding layers may be provided, or one core may be provided. The number and diameter of the metal wires of the winding layer may be various numbers and diameters other than the embodiment.

[0029]

EXAMPLES Next, working effects of the soundproof toothed cable obtained by the production method of the present invention will be described with reference to examples and comparative examples. Example 1 Referring to FIG. 1, an outer diameter of 0.36 mm was formed around one core wire 4 made of a hard steel wire having an outer diameter of 0.73 mm.
Helically wound four hard steel wires to form a first winding layer 5 and further helically wound six hard steel wires having an outer diameter of 0.6 mm in the opposite direction to form a second winding layer 6. By doing so, the core 1 was manufactured. Next, a hard steel wire with an outer diameter of 1.2 mm is used for 0.94 m.
The tooth 2 was spirally wound so as to leave a gap of m. Then, after the adhesive was dropped, the outer diameter was 1.35 m.
m, a nylon tube having an outer diameter / inner diameter ratio of 1.35 was wound around the gap between the teeth to obtain a soundproof toothed cable A of Example 1. Ratio of tube winding outer diameter to tooth winding outer diameter (D
3 / D2) was 1.05.

The soundproof toothed tube A is accommodated in a pipe having an inner diameter of 5.6 to 6.6 mm and an outer diameter of 7 to 8 mm in a state as shown in FIG. 2, and has a speed of 20 mm / sec and a load of 6 kg.
The noise level was measured under the condition of f. In addition, the soundproof toothed cable was reciprocated 10,000 times, a durability test was performed, and the condition after the durability was confirmed. Grease was applied to the inside of the pipe.
The results of the durability test are shown in the column of “Performance” in Table 1.

[Examples 2 to 4] The same cores as in Example 1 were used.
Tubes having an outer diameter / inner diameter ratio of 4.9 and 1.2, respectively, are spirally wound in the same manner as in Example 1 around a toothed cable having a tooth structure, and the soundproof toothed cables of Examples 2 and 3 are used. Was manufactured. In addition, a tube having an outer diameter / inner diameter ratio of 1.35 was used, and the ratio of the tube outer diameter to the tooth outer diameter was 1.1.
A soundproof toothed cable of Example 4 was manufactured in the same manner as in Example 1, except that the cable was spirally wound so that Examples 2 to 4
, A durability test was performed 10,000 times under the same conditions as in Example 1 described above. Table 1 shows the results.

[0032]

[Table 1]

Comparative Examples 1 to 4 A soundproof toothed cable was manufactured as Comparative Example 1 under the same conditions as in Example 1 except that the outer diameter of the tube was 1.1 times the inner diameter. Further, the soundproof toothed cable of Comparative Example 2 was manufactured under the same conditions as in Example 1 except that the tube winding outer diameter was set to 1 in comparison with the tooth winding outer diameter. Further, without using an adhesive, the gap between the teeth is 1.2 mm
Were manufactured as the soundproof toothed cables of Comparative Example 3 and Comparative Example 4, respectively. The durability test was also performed on the soundproof toothed cables of Comparative Examples 1 to 4 under the same conditions as in the example. Table 2 shows the measured values of the noise level at that time.

[0034]

[Table 2]

In Tables 1 and 2, the symbol ◎ in the column of “judgment” indicates “very good”, and the symbol ○ indicates “good”.
Δ indicates “not very good”, and x indicates “bad”. As is clear from the above results, in Examples 1 to 4, the noise level was quiet at 40 to 42 dB, and no abnormalities such as tube peeling and pipe abrasion occurred. However, in the soundproof toothed cables of Comparative Examples 1 and 2, the noise level was as high as 46 dB and 51 dB, and the tube was peeled off or the inner surface of the pipe was worn. Also in the case of Comparative Examples 3 and 4, the tube peeled off. From the above, it can be seen that the soundproof toothed cable of the present invention has a predetermined noise prevention effect and has sufficient durability.

[Brief description of the drawings]

FIG. 1 is a side view of an essential part showing one embodiment of a soundproof toothed cable obtained by a manufacturing method of the present invention.

FIG. 2 is a side view showing a use state of the soundproof toothed cable.

FIG. 3 is a process chart showing one embodiment of a method for manufacturing a toothed cable of the present invention.

FIG. 4 is a side view showing an example of a general toothed cable.

[Explanation of symbols]

 A toothed cable 1 core 2 tooth 3 tube S gap 4 core wire 5 first winding layer 6 second winding layer D1 core outer diameter d1 tooth diameter D2 tooth winding outer diameter P tooth pitch d2 Outer diameter of tube d3 Inner diameter of tube 10 Conduit 11 Bent portion 12 Slit 13 Connecting member 14 Driven member M Motor 15 Gear

Claims (5)

[Claims] 1. A wire made of metal wire is spirally wound around an outer peripheral surface of a core made of metal wire at equal intervals, an adhesive is dropped on the core, and the diameter between the teeth is larger than that of the tooth. A method of manufacturing a soundproof toothed cable in which a synthetic resin or rubber tube is densely spirally wound. 2. The tube according to claim 1, wherein said tube has an outer diameter of 1.2 to 1.2.
5 times, the outer diameter of the tube is 1.0 times the outer diameter of the tooth
The method according to claim 1, wherein the ratio is 1 to 1.1 times. 3. The method according to claim 1, wherein the gap between adjacent teeth is 0.9 to 1 times the outer diameter of the tube. 4. The method according to claim 1, wherein the core is manufactured by providing at least one metal winding layer on a metal wire. 5. The method according to claim 1, wherein the tube is manufactured by extruding a thermoplastic resin or rubber.