JPH0637309Y2 - Vibration generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a vibration generator used for testing the vibration resistance of various parts and home appliances.

(Prior Art) In this type of vibration generating device, there is known a device in which a lead wire is provided between a vibration table and a body.

Mounting portions are provided at both ends of the lead wire.The middle portion of the lead wire is folded back in an arc shape by 180 degrees to extend one end portion and the other end portion upward, and the mounting portion on one end side is vibrated. It was fixed to the table side, and the mounting portion on the other end side was fixed to the body side.

(Problems to be solved by the invention) However, in the above-described conventional vibration generator in which the vibration table vibrates up and down, the roots of both ends of the lead wire are easily broken, and there is a problem in durability. Also, the electrical contact between the core wire at both ends of the lead wire and the mounting portion is poor,
The electric resistance in this portion was increased.

The present invention has been made in order to solve the above-mentioned conventional problems, and its purpose is to improve the durability of a lead wire provided between a vibration table and a body, and to improve the end portions of the lead wire. To improve the electrical contact between the core wire and the mounting portion.

(Means for Solving the Problem) Therefore, in the vibration generator of the present invention, in the vibration generator having a lead wire that is provided between the body that vibrates up and down and the body, Secure a sleeve made of a good conductive material in a substantially cylindrical shape so as to surround the core wire at both ends, and the one end portion of the lead wire whose middle portion is folded back in an arc shape is horizontally extended to the vibration table side. Also, fix the other ends to the body side via the mounting parts,
At least one of the mounting portions is composed of a pair of fixing members made of a highly conductive material that abut against each other, and a contact surface that contacts the outer peripheral surface of the sleeve is formed on the abutting surfaces of both fixing members. A curved surface portion that smoothly contacts both end portions of the lead wire is formed at the end portion of the contact surface on the side of the intermediate portion, and a fastening means for fastening the both fixing members to each other is provided.

(Operation) In the above vibration generator, the vertical vibration of the vibration generating table is effectively absorbed by the arc-shaped part of the middle of the lead wire, and an excessive force is applied to the roots of both ends of the lead wire. In addition to the difficulty, both roots of the lead wire are in smooth contact with the curved surface portions formed on both fixing members of the mounting portion, so that the lead wire is protected from breakage and the like.

A sleeve is fixed to the core wires at both ends of the lead wire so as to surround the core wire, and the sleeve is sandwiched between the contact surfaces of both fixing members, and is further vertically tightened by the tightening force of the tightening means. Therefore, due to the synergistic effect of the contact surface of both fixing members and the outer peripheral surface of the sleeve being in close contact with each other, and the sleeve being deformed so as to be in close contact with the core wire by the tightening force, the core wire is deformed Even when the accuracy is deteriorated, the electrical contact state between the mounting portion and the lead wire is improved, and the electric resistance at this portion is reduced.

In particular, when a braided wire is used for the core wire, there is unevenness on the surface and deformation of both ends of the core wire and deterioration of dimensional accuracy are likely to occur. Since it is deformed by the tightening force and comes into close contact with the surface of the braid, the effect of improving the electrical contact state between the attachment portion and the braid is more remarkable.

(Example) Next, a specific example of the vibration generator of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an essential part of an embodiment of the present invention, in which 1 is a vibrating table, 2 is a body, and a lead wire 3 is provided between them. The vibration table 1 vibrates up and down as indicated by an arrow V by operating the vibration generator, and vibrates the sample to be set thereon. The body 2 forms a fixed system (non-vibration system) of the vibration generator. The middle portion of the lead wire 3 is folded back in an arc shape, one end thereof extends horizontally and extends toward the vibration generating table 1, and the other end thereof extends obliquely to the lower left in the drawing. . The both end portions are fixed to the vibration table 1 and the body 2 by mounting portions 4 and 5, respectively, as will be described later in detail.

As shown in FIG. 2, the lead wire 3 has a structure in which a core wire 6 made of a braided copper wire having a substantially circular cross section is covered with a coating layer 6a,
The coating layer 6a is removed at both ends of the lead wire 3, and a copper-made substantially cylindrical sleeve 7 is fixed by caulking.
The sleeve 7 may have a shape obtained by cutting the tip portion 11 on the tip side of the cutting line 10.

The structure of the mounting portions 4 and 5 will be described.
Has an upper plate 12 and a lower plate 13 as a fixing member,
It is fixed to seat surfaces 22 and 24 described later with mounting bolts 14 and 14. As shown in FIG. 3, the upper plate 12 and the lower plate 13 made of copper plates have semi-cylindrical surfaces (contact surfaces) 15 and 15 into which the sleeve 7 is fitted, in the widthwise central portion thereof. Horizontal abutment surfaces 16, 16
Is struck by. Curved surface portions 17, 17 are formed at the ends of the semi-cylindrical surfaces 15, 15 on the side of the intermediate portion of the lead wire 3 so as to smoothly expand in the radially outward direction.

Mounting bolts (tightening means) are attached to the upper plate 12 and the lower plate 13.
14 and 14 penetrate vertically, and these mounting bolts 14 and 14 are
The mounting portion 4 on the one end side is screwed into a substantially horizontal seating surface 22 of the connecting portion 21 provided on the vibration table 1 side. On the other hand, at the mounting portion 5 on the other end side, the mounting bolt 1
Reference numerals 4 and 14 are screwed into the inclined seat surface 24 of the connecting portion 23 provided on the body 2 side. In addition, the curved portion 25 formed in the middle portion of the lead wire 3 is folded back in an angle range smaller than 180 degrees, and the seat surface 24 is in a state where no excessive force is applied within the angle range of 0 to 90 degrees. Can be selected.

In the above-mentioned one embodiment apparatus, the inclination angle θ of the seat surface 24 with respect to the horizontal line L in FIG. 1 is set to 20 to 35 degrees, the vertical amplitude of the vibration table 1 is set to 40 to 60 mm, and the predetermined cycle is set. When the vibrating table 1 is vibrated at 1, the durability until the base 31 of the lead wire 3 on the mounting portion 5 side is broken is improved to 3 to 5 times as compared with the case of the conventional example described above. In this way, the durability of the lead wire 3 is significantly improved because the curved portion 25 of the lead wire 3 exerts an excellent vertical vibration absorbing action, and an excessive force is applied to the joints 30 and 31 at both ends. It is difficult to use the curved surface parts 17 and 17 of both the mounting parts 4 and 5 for the base 3
It was inferred that this was because 0 and 31 smoothly contacted the mounting portions 4 and 5. Further, when the mounting portion 5 of the lead wire 3 on the body 2 side is fixed in an inclined state, the bending force (bending force due to vertical vibration) acting in the vicinity of the mounting portion 5 is reduced, Also in terms of durability, the durability can be further improved.

The equivalent effect of improving durability is that the middle part of the lead wire 3 is folded back in an arc shape by 180 degrees, both ends are extended horizontally, and one end is fixed to the horizontal seating surface on the vibration table 1 side.
It is known that it can be obtained when the other end is fixed to the horizontal seating surface on the body 2 side.

Next, in both of the mounting portions 4 and 5, the outer peripheral surface of the sleeve 7 and the semi-cylindrical surfaces 15 and 15 are in close contact with each other, so that the electrical contact state between the sleeve 7 and the semi-cylindrical surfaces 15 and 15 is improved. . Then, the sleeve 7 crimped to the braided core wire 6 is further added via the semi-cylindrical surfaces 15 and 15 to the mounting bolts 14,
Since it is strongly tightened by the tightening force of 14, the sleeve 7 is deformed by this tightening force so as to come into close contact with the surface of the core wire 6, and the electrical connection state is further improved. As described above, the electrical contact state between the mounting portions 4 and 5 and the lead wire 3 is improved, so that the electrical resistance between the mounting portions 4 and 5 and the lead wire 3 is reduced. Even when the core wire of the lead wire is a solid core wire made of, for example, phosphor bronze, when the shape of the cut portion of the solid core wire is deformed or the dimensional accuracy is deteriorated, the same sleeve 7 is used. The effect of improving electrical connectivity can be obtained.

The specific embodiments of the vibration generator of the present invention have been described above, but the present invention is not limited to the above-mentioned embodiments, and various modifications can be carried out within the scope of the present invention. . For example, in the above embodiment, the case where one lead wire 3 is provided is shown. However, when the required current capacity increases, two lead wires 3 are attached as shown in FIG. The number of lead wires 3 can be arbitrarily increased so as to be provided between the portions 34 and 35. Further, the core wire is not limited to the case of the circular cross section as in the above-mentioned embodiment, and may have another cross section such as a flat shape. Further, the tightening means is not limited to the mounting bolt 14 and may be any means that can tighten at least the upper plate 12 and the lower plate 13 in the vertical direction.

(Effect of the Invention) As described above, in the vibration generator of the present invention, the durability of the lead wire is significantly improved as compared with the conventional one, and satisfactory durability can be obtained. In addition, at the mounting portions at both ends of the lead wire, the contact surface of both fixing members and the outer peripheral surface of the sleeve are brought into close contact with each other by the tightening force of the tightening means, and the sleeve is deformed so as to be brought into close contact with the core wire by the above-mentioned tightening force. Even if the core wire is deformed or the dimensional accuracy is deteriorated, the electrical contact state between the mounting portion and the lead wire can be improved by the synergistic effect of The electric resistance can be reduced.

In particular, when a braided wire is used as the core wire, there is unevenness on the surface and deformation of both ends of the core wire and deterioration of dimensional accuracy are likely to occur. Since it is deformed by the tightening force and comes into close contact with the surface of the braided wire, a greater effect of improving the electrical contact state between the mounting portion and the braided wire can be obtained.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an essential part of a vibration generator according to an embodiment of the present invention, FIG. 2 is a vertical sectional view showing a lead wire, and FIG.
FIG. 4 is a vertical sectional view corresponding to a III-III section of the mounting portion, and FIG. 4 is a vertical sectional view showing another embodiment of the mounting portion. 1 ... Vibration table, 2 ... Body, 3 ... Lead wire, 4, 5
… Mounting part, 7… Sleeve, 12… Upper plate (fixing member), 13…
Lower plate (fixing member), 14 ... Mounting bolt (tightening means), 15 ...
Semi-cylindrical surface (contact surface), 17 ... curved surface part.

Claims (1)

[Scope of utility model registration request] 1. A vibration generator having a lead wire extending between an oscillating table which vertically vibrates and a body, and having a substantially cylindrical good conductivity so as to surround a core wire at both ends of the lead wire. A sleeve made of a flexible material is fixed, and the one end of the lead wire whose middle part is folded back in an arc shape is extended horizontally, and the other end is attached to the vibration table side and the body side, respectively, via the attachment parts. At least one of the mounting portions is fixed and is composed of a pair of fixing members made of a good conductive material that abut against each other, and the abutting surfaces of both the abutting members contact the outer peripheral surface of the sleeve. And a curved surface that smoothly contacts both ends of the lead wire is formed at the end of the contact surface on the side of the intermediate portion, and a clamping means for clamping the both fixing members to each other is provided. apparatus.