JP2002345135A - Stay guard and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stay guard which can be connected quickly, surely, and firmly, without using metal bises and rivets and can be disposed in the lump, without segregation of recycling, and to provide a method of manufacturing it. SOLUTION: A required number of synthetic resin guard members 1 and 5, which are formed into cylindrical shapes with slits 2 and 6, are coupled to each other, ultrasonic waves are applied to the coupled part, and the synthetic resin guard members 1 and 5 are welded at the coupled part and connected firmly with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a branch guard attached to a supporting branch such as a telephone pole and the like, and a method of manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, as a branch line guard of this type, a relatively large-diameter synthetic resin lower guard member provided with a slit is provided with a slit through a tenon to form a small-diameter synthetic resin upper part. A guard member is joined and connected in a fitting manner, and the fitting joint is fixed by a metal screw (see Japanese Utility Model Publication No. 61-15156), or a required length provided with a slit. A synthetic resin support member with a slit for supporting a branch line is joined to a synthetic resin guard body having a diameter in a fitting manner, and the fitting joint portion is fixed by a metal rivet or the like (actual opening). JP-A-60-135446 and JP-A-61-80959) are known. In the first conventional example configured as described above, the upper and lower guard members are attached to the branch lines while being forcibly expanded along the slits, and the second conventional example is The guard body and the supporting member are mounted on the branch line so as to be fitted to the branch line while being forcibly expanded along the slit, and are used.

[0003]

By the way, in the first conventional example constructed as described above, the fitting joint of the upper and lower guard members is made of metal screws, and in the second conventional example, the guard is formed. Since the fitting joint between the metal body and the supporting member is fixed to each other by metal rivets or the like, the joining can be performed relatively firmly. However, the first
In the prior art, a screw hole is formed in the upper guide member and a screw hole is formed in the lower guide member, and the screw is fixed by screws. In the second conventional example, a rivet hole or the like is formed in the guard body and the support member. Are formed and fixed by rivets or the like, and the joining is very troublesome and troublesome, and is extremely inefficient. In addition, even when recycling the branch line guard, metal screws and rivets must be removed in advance and pelletized. It also has problems from a point of view. In addition, the fitting joint of the upper and lower guard members,
A method has been proposed in which the fitting joint between the guard body and the support member is fixed with a synthetic resin screw or rivet, but the joining is very troublesome and labor-intensive as in the above-mentioned conventional example. However, there is a problem in strength, and practicality cannot always be satisfied.

The present invention solves the problems of the conventional example,
A branch guard that can be quickly and surely and firmly joined without using metal screws and rivets, and that can be collectively processed without separation at the time of recycling, and its manufacture. It seeks to provide a way.

[0005]

That is, according to the first aspect of the present invention, there is provided a branch wire guard which is formed by joining a required number of synthetic resin guard members having a cylindrical shape with slits in a fitting manner. A girder of the present invention, wherein the joining portion is welded and joined by ultrasonic welding means.

According to a second aspect of the present invention, there is provided a branch line guard according to the first aspect, wherein the joints of the guard members are welded and joined by vertical and horizontal beads. Things.

According to a third aspect of the present invention, a required number of synthetic resin guard members formed into a cylindrical shape with a slit are joined and connected in a fitting manner, and welding is performed by applying ultrasonic waves to the joined portions. The gist of the present invention is a method of manufacturing a branch guard, which is characterized by joining.

The invention according to claim 4 is characterized in that at least one of the joining surfaces of the guard members is formed with vertical and horizontal projections, and the projections are melted and welded by applying ultrasonic waves. The gist of the present invention is a method of manufacturing a branch guard according to claim 3.

[0009]

Embodiments of the present invention will be described below with reference to an embodiment shown in the drawings. 1 to 8 show an embodiment of the present invention. In the drawings, reference numeral 1 denotes a lower part made of a polyethylene resin having a required length and diameter, both ends of which are tapered and having an elliptical cross section and a cross section. The guard member 2 has a widening slit formed along the longitudinal direction of the lower guard member 1, and the cylindrical member 3 has a cylindrical shape extending stepwise at one end of the lower guard member 1. The tenon 4 is a relatively wide expanding / engaging slit formed along the longitudinal direction of the tenon 3, and the slit 4 is positioned on the same line to communicate with the slit 2. 5 is an upper guard member made of polyethylene resin having a required length and diameter and joined to the lower guard member 1 by being externally fitted to the tenon 3, and 6 is located on the same line as the slits 2.4. An expansion slit 7 formed along the longitudinal direction of the upper guide member 5 is an engagement ridge which is formed to protrude inward in opposition on both sides of the opening edge at one end of the slit 6. -The locking member 5 is
And the upper guard member 5
The vertical and horizontal projections 8a which are previously provided on the fitting and joining surfaces are welded and joined by means of beads 10 melted by ultrasonic welding means 9. 11 is an ultrasonic oscillator constituting the ultrasonic welding means 9, and 12 is the ultrasonic oscillator 11
Is connected to the lower part of the vibrator 12.
The horn mounted via the housing 14 and the horn 15
An air cylinder 16 is mounted on the upper part of the air cylinder so as to pressurize it downward. In addition, 17 is a telephone pole,
Reference numeral 18 denotes a branch line extending obliquely between the ground and the ground so as to support the telephone pole 17, and the branch line 18 is fixed to an anchor 19 buried in the ground via a branch line rod 20 and a thimble 21. ing.

The embodiment constructed as described above has an upper guard.
The upper and lower guide members 5 and 1 are expanded along the slits 2.4.6 while resisting the elastic force of the lower guide member 5 and the lower guide member 1. Each applies to thimble 21. Thereafter, the upper guard member 5 and the lower guard member 1 are automatically closed by their elastic force, and the slits 2, 4 and 6 are closed to be fitted in an outer fitting manner (FIG. 1). And FIG. 7).

Next, a description will be given of a manufacturing method of the embodiment configured as described above. First, the engaging ridge 7 is slit 4
The upper guard member 5 is joined to the lower guard member 1 in a fitting manner while being engaged with the lower guard member 1, and the vertical and horizontal projections 8a projecting from the inner peripheral surface of the upper guard member 5 in advance are recessed. 3 against the outer peripheral surface. At this time, as shown in FIGS. 3 and 4, the projection 8a preferably forms two vertical projections 22a along the longitudinal direction of the upper guard member 5, and each of the vertical projections 22a has It is preferable to form two to four horizontal protrusions 23a along the circumferential direction so as to be orthogonal. The length of the vertical protrusion 22a is 35 mm, and the length of the horizontal protrusion 23a is 10 mm.
突起 17 mm, the cross-sectional shape of each of the projections 22 a and 23 a is substantially triangular, the base dimension is 1.2 mm, and the top is 0.2
It is preferable that the height and the height are set to 0.5 mm. Next, as shown in FIG. 6, the upper and lower guard members 5.
The receiving jig 16 is applied to the inside of the fitting joint 1 and is placed and supported on a required receiving table (not shown). After a while
The driving signal is transmitted from the ultrasonic oscillator 11 to the vibrator while the horn 13 is brought into contact with the outer peripheral surface of the fitting joint of the upper and lower guard members 5.1 and is pressurized by the air cylinder 15 at a required pressure. 12 to vibrate the horn 13. At this time, the frequency of the ultrasonic oscillator 11 is 19 to 28.
It is preferable to vibrate the horn 13 at about kHz and vibration energy of about 400 W. Due to the vibration of the horn 13, frictional heat is generated in the projection 8a on the inner peripheral surface of the upper guard member 5 and is sequentially melted, and the fusion of the projection 8a becomes the bead 10 to weld the fitting joint. Let's join. After a predetermined time, the operation of the air cylinder 15 together with the ultrasonic oscillator 11 is stopped to stop the vibration of the horn 13, and the welded bead 10 is hardened to generate a branch line guard.

A tensile strength test in the longitudinal direction and a peel strength test in the circumferential direction were performed by a conventional method using "Autograph AG-5KNE" manufactured by Shimadzu Corporation. Table 1 shows the results. In addition, a branch line guard joined and fixed with a metal rivet is referred to as Comparative Example 1, and a branch line guard joined and fixed with a synthetic resin rivet is referred to as Comparative Example 2. And a peel test. The results are shown in Table 1.

[0013]

[Table 1]

As is clear from Table 1, the example is Comparative Example 1.
As compared with the first and second embodiments, not only the tensile strength but also the peeling strength is very large, and it can be understood that the upper guard member 5 and the lower guard member 1 are bonded very firmly. .

In the above embodiment, the upper and lower guard members 5.1 are made of polyethylene resin.
A thermoplastic resin such as a polyamide resin, an acetal resin, a polybutylene terephthalate, or a polycarbonate resin may be adopted and used. Further, the vertical and horizontal projections 8a are formed on the inner peripheral surface of the upper guard member 5, but are not limited to this, and are formed on the outer peripheral surface of the tenon 3 of the lower guard member 1. Alternatively, a required number may be formed at required locations as appropriate, such as by alternately forming not only the upper guard member 5 but also the outer peripheral surface of the tenon 3. Further, the shape of the protruding portion 8a is not limited to the above embodiment. For example, as shown in FIG.
For example, the two vertical projections 22b and the two horizontal projections 23b are formed in an orthogonal shape to form a substantially well-like shape, and the required members are orthogonal or crosswise in the longitudinal direction and the circumferential direction of the guard member 5. It may be formed. In addition, the embodiment has upper and lower guards.
Are formed by joining and connecting the connecting members 5.1 in a fitting manner. However, when it is necessary to form a long branch line guard, a required number of upper and lower guards are required. Alternatively, the support member may be formed by joining and connecting the support members in a fitting manner, or simply by fitting the supporting member to the guard body of a required length in a fitting manner.

[0016]

According to the first aspect of the present invention, a required number of synthetic resin garments formed into a cylindrical shape with a slit are formed as described above.
And the connecting members are welded and joined by ultrasonic welding means. Therefore, metal screws or rivets are used as in the conventional example. Not only can it be bonded quickly, reliably, and firmly, but also can be batch processed without separation as in the conventional case at the time of recycling. It can be done easily.

According to the second aspect of the present invention, since the joints of the guard members are welded and joined by vertical and horizontal beads, the tensile strength in the longitudinal direction of the guard members is increased. Not only that, the peel strength in the circumferential direction is large, the bonding is very strong, and the coating can withstand long-term use.

According to the third aspect of the present invention, a required number of synthetic resin garments having a cylindrical shape with a slit are formed as described above.
Since the joint members are joined together in a fitting shape and connected, and ultrasonic waves are applied to the joints for welding and joining,
It is possible to manufacture a branch line guard that is always and quickly and securely bonded without using metal screws or rivets as in the conventional example.

According to the fourth aspect of the present invention, a vertical and horizontal projection is formed on at least one of the joint surfaces of the guard members, and the projection is melted and welded by applying ultrasonic waves. Therefore, it is possible to manufacture a branch guard having a large tensile strength in the circumferential direction as well as a tensile strength in the longitudinal direction of the guard member.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention together with a usage example.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 shows upper and lower guard members 5 before joining in the embodiment.
FIG.

FIG. 4 is a partially enlarged plan view showing a protrusion 8a of the embodiment.

FIG. 5 is a partially enlarged sectional view showing a state in which upper and lower guard members 5.1 of the embodiment are fitted.

FIG. 6 is a cross-sectional view showing a state where welding is performed by the ultrasonic welding means 9 of the embodiment.

FIG. 7 is a side view showing a use state of the embodiment.

FIG. 8 is an enlarged plan view showing another embodiment of the protrusion 8b.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 lower guard member 2 slit 3 tenon 4 slit 5 upper guard member 6 slit 8 a, 8 b projection 9 ultrasonic welding means 10 bead 11 ultrasonic oscillator 12 vibrator 13 horn 15 air cylinder 18 branch line 22a / 22b Vertical projection 23a / 23b Horizontal projection

Claims (4)

[Claims] 1. A branch line guard connected by connecting a required number of synthetic resin guard members formed into a cylindrical shape with a slit in a fitting manner.
A branch guard, wherein the joints are welded and joined by ultrasonic welding means. 2. A branch guard according to claim 1, wherein the joints of the guard members are welded and joined by longitudinal and lateral beads. 3. The method according to claim 1, wherein a required number of synthetic resin guard members formed into a cylindrical shape with a slit are joined and connected in a fitting manner and welded by applying ultrasonic waves to the joined portions. A method of manufacturing a branch line guard. 4. The method according to claim 3, wherein a vertical and horizontal projection is formed on at least one of the guard member joining surfaces, and the projection is melted and welded by applying ultrasonic waves. Manufacturing method of branch guard.