JPH0417309A - Frame assembly method of solenoid - Google Patents

Abstract

PURPOSE:To make a coupling area wide, to ensure a high strength, to reduce a deformation amount and to arrange that a plated part is hard to exfoliate by a method wherein, in a state that a protruding part of a frame main body has been fitted into a recessed part of a flat end sheet, the protruding part is bent and deformed obliquely so as to be brought into close contact with a coupling face by a pressure from its outer side and it is caulked. CONSTITUTION:A flat end sheet 6 is caulked to a main body 3 composed of an end sheet part 4 and side sheet parts 5; a frame 1 for magnetic-circuit formation use is constituted. At such a frame assembly method, protruding parts 10 are formed at end edges of the side sheet parts of the frame main body 3, recessed parts 12 into which the protruding parts 10 are fitted are formed at end edges of the flat end sheet 6, and coupling faces 14 which are inclined with reference to the axial-line direction of a coil are formed at inner faces to which inner faces of the protruding parts 10 of the recessed parts 12 correspond. In a state that the flat end sheet 6 is positioned to the frame main body 3 and that the protruding parts 10 have been fitted into the recessed parts 12, the brought into close contact with the coupling faces 14 by a pressure from their outer side, they are caulked and the flat end sheet 6 is fixed to the frame main body 3 by coupling the protruding parts to the coupling faces 14.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention provides a frame body consisting of an end plate portion corresponding to one end surface of a solenoid coil and a side plate portion corresponding to the outer peripheral surface of the coil. It relates to a method for assembling a frame for constructing a frame for forming a magnetic circuit by caulking flat end plates corresponding to the end faces of the magnetic circuit.

BACKGROUND OF THE INVENTION When configuring a frame for forming a magnetic circuit of a solenoid as described above, a method of crimping a flat end plate to the frame body has been conventionally used.
There is one disclosed in Japanese Patent No. 30485. This means is fixed by inserting a protrusion formed on the side plate of the frame body into a notch formed in the end plate, crushing and deforming the protrusion, and engaging the deformed portion with the edge of the notch. It is supposed to be done.

Problems to be Solved by the Invention However, in the above-described means for deforming the caulked portion by crushing it, the area of the surfaces where the deformed protrusion and the notch engage with each other is relatively small. It has the disadvantage that it is easy to misalign and the crimping force is weak. In addition, since the surface of a protrusion that is crushed has a large amount of deformation, if the surface of the protrusion is plated to prevent rust, the plating will peel off and the base metal will be exposed, preventing rust from forming. There was also the drawback of inviting people.

Means for Solving the Problems As a means for solving the above-mentioned problems, the present invention forms a convex portion on the edge of the side plate portion of the frame main body, and a recess into which the convex portion is fitted on the side edge of the flat end plate. At the same time, an engagement surface that is oblique to the axial direction of the coil is formed on the inner surface of the recess corresponding to the inner surface of the convex part, and the flat end plate is positioned on the frame body and the convex part is inserted into the recess. In this state, the convex portion is bent diagonally and deformed by pressure from its outer surface so that it comes into close contact with the engaging surface, and the flat end plate is attached to the frame body by the engagement of the convex portion with the engaging surface. It has a fixed configuration.

Functions and Effects of the Invention The present invention has the above-mentioned configuration, and since caulking of the convex part to the concave part is performed by the close contact between the inner surface of the convex part and the engagement surface of the concave part, the engagement area is wide and the strength is high. Moreover, since the contact surface is oblique to the axis of the coil, there is an effect that it is difficult for the coil to come off both in the axial direction of the coil and in the direction perpendicular to the axis. In addition, when caulking, the convex part is not crushed but only pressed, so the amount of deformation of the surface part is extremely small.For this reason, when the surface of the convex part is plated to prevent rust. This has the effect of preventing the plating from peeling off easily and preventing the occurrence of rust as much as possible.

EXAMPLE Hereinafter, an example of the present invention will be described based on the accompanying drawings.

In FIGS. 1 and 2, l is a frame for forming a magnetic circuit of a solenoid, and has a shape that surrounds a coil (not shown) embedded in the resin mold 2 with its axis directed in the vertical direction. There is.

This frame 1 has an end plate portion 4 corresponding to the lower end surface of the coil.
A U-shaped frame main body 3 is formed by connecting two wires with a pair of parallel side plate parts 5.5 corresponding to the outer peripheral surface of the coil, and a fixed iron core 7 is fixed to the center part, and the upper end surface of the coil The frame body 3 and the flat end plates 6 are assembled by means described later. When the coil is energized, a magnetic circuit passing through the frame l is formed, and due to the magnetic attraction force generated by this, the coil passes through the end plate part 4 of the frame body 3 and is fitted into the center hole of the coil. A plunger (not shown) is adapted to be attracted to the lower surface of the fixed iron core 7.

On the upper end surface of the side plate portions 5.5 of the frame body 3, a pair of upwardly projecting convex portions 1O are formed. On the other hand, in the two-line portions of the flat end plate 6 corresponding to the side plate portions 5.5, recesses 12 into which the convex portions 10 are fitted are formed with openings on the side surfaces. On the back surface corresponding to the inner surface of the convex portion 10 of each concave portion I2,
An engagement surface 14 is formed which is inclined obliquely upward at an angle of about 30° with respect to the axial direction of the coil.

What is shown in FIGS. 3 and 4 is a jig 20 for assembling and fixing the flat end plate 6 to the frame body 3.

A holding recess 22 is formed on the upper surface of the jig main body 21. A holding recess 22 is formed into which the frame ■ is tightly fitted with its upper end slightly protruding.A pair of sliding guides are provided on both sides of the holding recess 22. A hole 23.23 is formed. These sliding guide holes 23 are provided with the engaging surface 1 of the recess 12 of the frame l.
A pair of punches 24, 24 each having a pressing surface 25 inclined parallel to the punch 4 at its tip slide horizontally along the upper surface of the jig body 21 with their tips facing each other. It is fitted to get. The punches 24 are urged to move away from each other by the elasticity of a return compression coil spring 27 installed between the downward protrusion 26 at the rear end and the jig main body 21, As shown in the figure, by bringing the protrusion 26 at the rear end into contact with the stopper 28, the tip is held in a retracted state within the sliding guide hole 23.

Further, above the punches 24, 24, a sub-punch 29 is provided which is driven up and down by a drive device (not shown). A pair of guide surfaces 30, 30 are formed inside both downwardly protruding end portions of the sub-punch 29, and are inclined so as to diverge downward from each other. On the other hand, a guided surface 31 parallel to the guiding surface 30 of the sub-punch 29 is formed at the rear end of each punch 24 .

Next, the procedure for assembling the frame 1 will be explained.

The flat end plate 6 is placed on the side plate part 5.5 of the frame main body 3, and the protrusion lO of the side plate part 5 is fitted into the concave part 12 of the flat end plate 6 to determine its position, and the frame l is temporarily assembled. On the other hand, jig 2
0, the sub punch 29 is retracted upward and the punch 24.24 is moved to the stopper 28.2.
8, and in this state, the temporarily assembled frame 1 is inserted into the holding recess 22 of the jig main body 21.

Next, the sub-punch 29 is moved downward, and its guide surface 30.
30 is brought into contact with the guided surface 31.3I of the punch 24.24. When the sub-punch 29 continues to be moved downward while the guide surface 30 and the guided surface 31 are brought into sliding contact, both punches 24 and 24 are pushed from both sides as the sub-punch 29 moves downward, and are moved horizontally so as to approach each other.

Both punches 24.24 have pressing surfaces 25.25 at their tips.
is brought into contact with the outer surface of the protrusions 10 of the frame l, and these protrusions 10 are pressed inward. Here, since the pressing surface 25 of the punch 24 is inclined diagonally downward, the pressed convex portion 10 bends and deforms so as to tilt inward. As shown in FIG. 4, the deformed convex portion 10 is caulked with its inner surface in close contact with the engagement surface 14 of the recess 12 of the flat end plate 6, and thereby the flat end plate 6 is attached to the frame body 3. Fixed.

After the frame I is assembled, when the sub-punch 29 is moved upward, both punches 24
．． 24 is moved away from both sides by the elasticity of the return compression coil spring 27.27, and the tip of the punch 24.24 is retracted into the sliding guide hole 23.23. After that, the assembled frame l is taken out from inside the holding recess 22.

In the frame I assembled by the above-described method, the protrusion IO and the engagement surface 14 of the recess 12 are engaged over a wide area in the caulked portion, so the caulking force is large and it is difficult to come off. Furthermore, since the engaging surfaces are inclined with respect to the axial direction of the coil, a strong crimping force is ensured both in the axial direction of the coil and in the direction perpendicular to the axis.

In addition, since the convex portion IO is not crushed and deformed, but is only bent and deformed by being pressed from the side, the convex portion IO
The amount of deformation on the surface is extremely small. therefore,
If the surface of the convex portion IO is plated for rust prevention before caulking, the plating is hardly peeled off and the bare metal of the convex portion 10 is exposed, thereby preventing rust from occurring.

[Brief explanation of the drawing]

The accompanying drawings show an embodiment of the present invention, in which FIG. 1 is a perspective view of the flat end plate crimped onto the frame body, FIG. 2 is a perspective view of the flat end plate before crimped to the frame body,
FIG. 3 is a partially cutaway front view of the jig for caulking in a state before caulking, and FIG. 4 is a partially cutaway front view of the jig after caulking has been performed. 1: Frame 3: Frame body 4: End plate portion 5: Side plate portion 6: Flat end plate IO: Convex portion 12: Concave portion 14: Engagement surface

Claims (1)

[Claims] A flat end plate corresponding to the other end surface of the coil is caulked to a frame body consisting of an end plate portion corresponding to one end surface of the solenoid coil and a side plate portion corresponding to the outer peripheral surface of the coil. A frame assembling method for constructing a frame for forming a magnetic circuit by forming a convex portion on an edge of the side plate portion of the frame main body;
A recess into which the protrusion is fitted is formed on a side edge of the flat end plate, and an engagement surface that is oblique with respect to the axial direction of the coil is formed on a back surface of the recess corresponding to the inner surface of the protrusion. With the flat end plate positioned on the frame main body and the convex part fitted into the concave part, the convex part is pressed from the outer surface side of the convex part so as to be in close contact with the engagement surface. A method for assembling a frame of a solenoid, characterized in that the flat end plate is fixed to the frame body by caulking by bending and deforming it, and by engaging the convex portion with the engagement surface.