JP3360259B2 - Projection nut supply device and its supply rod - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION A projection nut supply device of a type in which a temporary fixing chamber for a projection nut is formed at a location where a component supply pipe and its guide pipe intersect, and a supply rod for moving forward and backward in the guide pipe is provided. Is commonly practiced. The present invention belongs to such a technical field.

[0002]

2. Description of the Related Art A prior art closely related to the present invention is disclosed in Japanese Utility Model Publication No. 3-2387. This will be described with reference to FIGS. The component supply pipe 1 having a rectangular cross section and the guide pipe 2 having a circular cross section are welded in a state of being orthogonal to each other. A temporary fixing chamber 3 is formed at the intersection of the two. Guide plate 4 that forms the inner wall of temporary holding chamber 3
Is fixed, and the magnet 5 is embedded therein. The projection nut 6 is attracted by the magnet 5 and is temporarily locked in the temporary fixing chamber 3.

[0003] The supply rod 7 which advances and retreats in the guide tube 2 includes:
It comprises a guide rod 9 which enters the screw hole 8 of the projection nut, a sliding rod 10 having a larger diameter than the guide rod 9, and an extruded surface 11 formed at the boundary between the guide rod 9 and the sliding rod 10. .

A notch 12 is provided in the component supply pipe 1 to form the temporary holding chamber 3, and the end of the component supply pipe 1 is bifurcated, and end faces 13 and 13 are formed on each of the ends. I have. A flat portion 14 is formed on the guide tube 2, and when the component supply tube 1 and the guide tube 2 are welded, the end faces 13, 13 and the flat portion 14 form one plane. The guide plate 4 is adhered to this series of planes. A bolt 16 is screwed into a support piece 15 welded to the guide tube 2, and the guide plate 4 is fixed by the bolt 16.

When the supply rod 7 advances from the state shown in FIG. 10, the guide rod 9 advances into the screw hole 8. And
When the pushing surface 11 comes into contact with the end face of the projection nut 6, the nut shifts from the attraction area of the magnet 5 and is supplied to the destination as it is. Although the target portion is not shown, it is a guide pin protruding from the steel plate part on the fixed electrode.

[0006]

With the above-described structure, it is necessary to provide a notch at the end of the component supply pipe, and it takes time to manufacture the component supply pipe. In particular, since the space required for the temporary storage room must be accurately determined, the production problem becomes even more difficult. The guide pipe and the part supply pipe are welded, but if the relative positions of the two are not set correctly, when the projection nut is temporarily locked in the temporary holding chamber, The axes of the guide rods do not match. if,
If there is such misalignment, the nut will be flipped off by the guide rod, and normal supply will not be achieved. Further, since the guide plate is brought into close contact with both the end surface of the forked portion and the flat portion of the guide tube, a flat surface must be formed with high precision for the close contact, which is disadvantageous in terms of manufacturing.

[0007]

Means for Solving the Problems and Their Functions The present invention has been made to solve the above-mentioned problems.
According to the first aspect of the present invention, a temporary fixing chamber for the projection nut is formed at a position where the component supply pipe and the guide pipe intersect, and a supply rod for moving back and forth in the guide pipe is provided. In a type having a guide rod entering the hole, a sliding rod having a diameter larger than the guide rod, and an extruded surface formed at a boundary portion between the guide rod and the sliding rod, the thickness of the guide tube is increased. Is set large, and the guide portion of the projection nut and the temporary fixing chamber are formed by grooves formed in the end surface of the guide tube.

[0008] Since the guide portion of the projection nut and the temporary fixing chamber are formed on the end face of the guide tube, the nut is smoothly moved from the guide portion to the temporary fixing chamber, and the temporary locking is smoothly performed. Since the groove is formed in the end face of the guide tube, the space required for the temporary fixing chamber can be set accurately. Since the groove is formed directly in the guide tube, the axis of the supply rod in the guide tube and the axis of the nut screw hole in the temporary fixing chamber can be accurately matched, so that the guide rod can be securely screwed into And nut supply without malfunction is achieved. Since the groove may be formed so as to pass through the axis of the guide tube, the manufacturing is simple and the accuracy is very easily required.

According to a second aspect of the present invention, in the first aspect, a guide plate forming an inner wall of the temporary holding chamber is provided at an end of the groove, and a magnet is attached to the guide plate. . Therefore, since the guide plate is assembled to the temporary fixing chamber formed with high precision, the temporary locking position of the projection nut can be accurately set. At the same time, the guide plate can be structured to be in close contact only with the guide tube, so that the mounting accuracy of the guide plate can be easily increased.

According to a third aspect of the present invention, in the first or second aspect, the sliding rod of the supply rod has a square cross-sectional shape, and the guide rod is fitted with the sliding rod so that the square cross-sectional portion exactly fits. It is characterized in that a guide groove for sliding is formed. As described above, since the sliding rod having the square cross section is guided by the guide groove fitted to the sliding rod, the direction of the supply rod in the rotating direction can always be accurately maintained. In particular, since the extruded surface is square, when the nut is pushed out while being in close contact with the square projection nut, the nut is securely held in close contact and the direction of rotation of the nut is correctly maintained. In other words, the square nut end face exactly matches the square extrusion face and is extruded.

According to a fourth aspect of the present invention, in the second aspect, the guide tube is made of a non-magnetic material. Since the guide tube is made of a non-magnetic material as described above, the magnet of the guide plate does not magnetize the guide portion and the inner surface of the temporary holding chamber. Therefore, the projection nut passing therethrough does not receive any suction force, and is smoothly moved.

According to a fifth aspect of the present invention, a projection nut temporarily supplied to a predetermined position is supplied, and a guide rod which enters a screw hole of the projection nut and a slide having a larger diameter than the guide rod are provided. It consists of an extruded surface formed at the boundary between the moving rod, guide rod, and sliding rod, and a sliding chamber with a circular cross section is formed in the sliding rod.
The sliding piece is inserted here, and the guide locking
The compression coil spring is inserted in the sliding chamber.
Is installed, and its tension acts on the sliding piece, causing the sliding piece to stop.
The sliding rod is configured to have a square cross section.

Since the sliding rod has a square cross section as described above, if a member for preventing rotation is provided, the supply rod in the rotational direction can always be accurately maintained with a simple structure. For example, by forming a guide groove that closely adheres to the sliding rod, smooth sliding and reliable rotation are achieved, and the square projection nut on the extrusion surface does not shift in the rotation direction. Since they are brought into close contact, the contact area between the extruded surface and the nut end surface can be set to the maximum value. This means that the nut does not rotate unnecessarily during the advancement of the supply rod, so that the nut is supplied in a predetermined direction to the destination.

That is, since the extruded surface is square, when the nut is pushed out while being in close contact with the square projection nut, the advance speed of the supply rod is faster than the falling speed of the nut. The rotation direction of the nut is correctly maintained. In other words, the square nut end face exactly matches the square extrusion face and is extruded. If
Contractor's hand is pinched between the tip of the guide rod and the steel plate part.
When the sliding piece shrinks the compression coil spring,
Since only the sliding rod advances, the force on the hand is
The elasticity of the spring minimizes worker damage
You.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. The projection nut 17 is a regular one and has a square shape and welding projections 1 at four corners.
8 are formed, and a screw hole 19 is formed in the center.
The guide tube 20 is made of a non-magnetic material, for example, stainless steel, and uses a thick pipe material, and has a groove 21 formed on the end face side. The groove 21 is provided in the guide tube 20
Are formed in a diametrical direction passing through the center, thereby forming a guide portion 22 and a temporary fixing chamber 23. Groove 2
1 is opened downward in FIG. 1, and the lower side of the temporary fixing chamber 23 is used as an outlet opening 24 as it is. Reference numeral 25 in FIG. 2 is an end surface of the guide tube 20. FIG. 2 is an external view of the guide tube 20 from which the related members have been removed, as viewed from the lower side of FIG.

The guide groove 26 extends along the axis of the guide tube 20.
Is formed. The guide groove 26 has a rectangular cross-sectional space as is apparent from FIG. Supply rod 2
Reference numeral 7 denotes a guide rod 28 which enters the screw hole 19 of the projection nut, a sliding rod 29 having a larger diameter than the guide rod 28, and an extruding surface 30 formed at the boundary between the guide rod and the sliding rod. ing. Here, the structure is such that the guide rod 28 can enter the sliding rod 29. For this purpose, a sliding chamber 31 having a circular cross section is formed in the sliding rod 29, in which a sliding piece 32 is inserted, and the guide rod 28 is connected to the sliding piece 32. Then, the compression coil spring 33 is connected to the sliding chamber 3.
1, the tension acts on the sliding piece 32, and the sliding piece 32 hits the stopper portion 34, so that the length of projection of the guide rod 28 is determined.

The slide rod 29 of the supply rod has a square cross section as is apparent from FIG. Therefore, the extrusion surface 30 is also square. The sliding rod 29 is fitted into the guide groove 26 exactly so as to be slidable. The relay pipe 3 is provided in the guide pipe 20.
5 is welded at reference numeral 36, and an air cylinder (not shown) is connected to the relay pipe 35. The piston rod of the air cylinder is connected to the sliding rod 29,
As a result, the supply rod 27 moves forward and backward. Moving the supply rod back and forth with an air cylinder in this way has already become conventional.

At the lower part of the guide tube 20, a flat support surface 3 is provided.
7 are formed. This surface is set in a direction perpendicular to the longitudinal direction of the groove 21. A guide plate 38 is in close contact with the support surface 37, and the guide surface 39 forms an inner surface of the temporary holding chamber 23. A magnet (permanent magnet) 40 is embedded in the guide plate 38. This is arranged so as to be shifted above the ceiling surface 41 of the temporary fixing chamber 23 as shown in the drawing, so that the projection nut 17 attracted by the magnet 40 is in close contact with the ceiling surface 41 and is always uniform. A temporary locking position is obtained.

A receiving surface 42 (see FIG. 2) is formed on the guide tube 20 at a position one step higher than the above-described support surface 37.
Here, the cover plate 43 is closely attached and welded to the guide tube 20. The weld is shown at 44 in FIG.
The bolt 4 is attached to the bracket 45 welded to the cover plate 43.
6 and screw the guide plate 38 at its tip to the supporting surface 37.
Fixed against.

The holding piece 47 is pressed against the sliding rod 29 in order to prevent the sliding rod 29 from moving forward or backward, ie, not to displace the sliding rod 29 to the right in FIG. ing. For this purpose, an L-shaped bracket 48 is welded to the cover plate 43, a bolt 49 is screwed into this bracket, and the holding piece 47 is pressed against the sliding rod 29 at the tip.

The part supply pipe 50 having a rectangular cross section is a part figure.
It extends from the die 51 and is welded to the guide tube 20 so as to communicate with the groove 21. Reference numeral 52 denotes the welded portion.
A part of the component supply pipe 50 is extended to form a cover plate 53, which covers the guide section 22. The guide plate 38 is also made of a non-magnetic material, stainless steel. Further, the supply destination of the projection nut 17 is a steel plate part on the fixed electrode.
9 is fitted, and is a general destination.

The operation of the above embodiment will be described. FIG.
Is a state in which the projection nut 17 is temporarily locked in the temporary fixing chamber 23, and at this time, the attractive force of the magnet 40 acts on the nut 17. Here the supply rod 2
When 7 advances, the guide rod 28 enters into the screw hole 19, and then the pushing surface 30 hits the upper surface of the nut 17. As a result, the nut 17 is pushed out while sliding on the guide surface 39 and supplied to the target portion. if,
When the operator's hand is caught between the tip of the guide rod 28 and the steel plate part, the sliding piece 32 is compressed by the compression coil spring 33.
Since only the sliding rod 29 advances while reducing the force, the force applied to the hand becomes the elasticity of the coil spring 33, and the damage to the operator can be minimized.

In the embodiment shown in FIG. 7, the manner of holding the projection nut is changed. In this embodiment, an opening / closing plate 54 is employed. The cover plate 43 is extended downward, and a shaft 55 of the opening / closing plate 54 is attached to a tip portion thereof. Although not shown, a helical spring is attached to the shaft 55,
A rotational force in the closing direction is always applied. When the supply rod advances and pushes out the nut, the opening / closing plate 54 is forcibly opened to supply the nut.

In the embodiment shown in FIG. 8, the above-described permanent magnet is changed to an electromagnet. Therefore, the iron core 56 is inserted into the guide plate 38, and the electromagnetic coil 57 is attached thereto.

The relative position between the groove 21 and the support surface 37 can be determined with high precision at the stage of machining. Therefore, the installation position of the guide plate 38 can be accurately determined, and the projection nut 17 in the temporary fixing chamber 23 is always locked at a fixed position. This means that the guide rod 2
Accurately matching the axis of the screw hole 19 with the axis of the screw hole 19 means that it is reliably realized. Therefore, an erroneous operation of flipping the nut can be avoided, and a highly reliable nut can be supplied. Further, since the support surface 37 is formed in the guide tube in a posture perpendicular to the longitudinal direction of the groove 21, the guide plate 3 is oriented in the correct direction with respect to the space of the
8 is attached. Therefore, the rectangular projection nut 17 does not shift in the rotational direction with respect to the temporary fixing chamber 23, and accurate temporary locking is achieved.

[0026]

According to the first aspect of the present invention, a temporary fixing chamber for a projection nut is formed at a location where a component supply pipe and its guide pipe intersect, and a supply rod for moving forward and backward in the guide pipe is provided. Is a type having a guide rod that enters the screw hole of the projection nut, a sliding rod having a diameter larger than this guide rod, and an extruded surface formed at the boundary between the guide rod and the sliding rod, The thickness of the guide tube is set to be large, and the guide portion of the projection nut and the temporary fixing chamber are formed by grooves formed in the end surface of the guide tube.

Since the guide portion of the projection nut and the temporary fixing chamber are formed on the end face of the guide tube, the nut is smoothly moved from the guide portion to the temporary fixing chamber, and the temporary locking is smoothly performed. Since the groove is formed in the end face of the guide tube, the space required for the temporary fixing chamber can be set accurately. Since the groove is formed directly in the guide tube, the axis of the supply rod in the guide tube and the axis of the nut screw hole in the temporary fixing chamber can be accurately matched, so that the guide rod can be securely inserted into the screw hole. And nut supply without malfunction is achieved. Since the groove may be formed so as to pass through the axis of the guide tube, the manufacturing is simple and the accuracy is very easily required.

According to a second aspect of the present invention, in the first aspect, a guide plate forming an inner wall of the temporary holding chamber is provided at an end of the groove, and a magnet is attached to the guide plate. . Therefore, since the guide plate is assembled to the temporary fixing chamber formed with high precision, the temporary locking position of the projection nut can be accurately set. At the same time, the guide plate can be structured to be in close contact only with the guide tube, so that the mounting accuracy of the guide plate can be easily increased.

According to a third aspect of the present invention, in the first or second aspect, the sliding rod of the supply rod has a square cross-sectional shape, and the rectangular cross-section of the sliding rod is fitted to the guide tube. It is characterized in that a guide groove for sliding is formed. As described above, since the sliding rod having the square cross section is guided by the guide groove fitted to the sliding rod, the direction of the supply rod in the rotating direction can always be accurately maintained. In particular, since the extruded surface is square, when the nut is pushed out while being in close contact with the square projection nut, the nut is securely held in close contact and the direction of rotation of the nut is correctly maintained. In other words, the square nut end face exactly matches the square extrusion face and is extruded.

According to a fourth aspect of the present invention, in the second aspect, the guide tube is made of a non-magnetic material. Since the guide tube is made of a non-magnetic material as described above, the magnet of the guide plate does not magnetize the guide portion and the inner surface of the temporary holding chamber. Therefore, the projection nut passing therethrough does not receive any suction force, and is smoothly moved.

According to a fifth aspect of the present invention, a projection nut temporarily supplied to a predetermined position is supplied, and a guide rod which enters a screw hole of the projection nut and a slide having a larger diameter than the guide rod are provided. The sliding rod has a rectangular cross section and is formed of an extruded surface formed at a boundary between the moving rod, the guide rod, and the sliding rod.

As described above, since the sliding rod has a square cross section, if some kind of detent member is provided, the supply rod in the rotating direction can always be accurately maintained with a simple structure. For example, by forming a guide groove that closely adheres to the sliding rod, smooth sliding and reliable rotation are achieved, and the square projection nut on the extrusion surface does not shift in the rotation direction. Since they are brought into close contact, the contact area between the extruded surface and the nut end surface can be set to the maximum value. This means that the nut does not rotate unnecessarily during the advancement of the supply rod, so that the nut is supplied in a predetermined direction to the destination.

That is, since the extrusion surface is square, when the nut is pushed out while being in close contact with the square projection nut, the feeding rod advances at a higher speed than the falling speed of the nut. The rotation direction of the nut is correctly maintained. In other words, the square nut end face exactly matches the square extrusion face and is extruded. If
Contractor's hand is pinched between the tip of the guide rod and the steel plate part.
When the sliding piece shrinks the compression coil spring,
Since only the sliding rod advances, the force on the hand is
The elasticity of the spring minimizes worker damage
You.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing an embodiment of the present invention.

FIG. 2 is an external view of a single guide tube viewed from below.

FIG. 3 is a sectional view taken along line (3)-(3) of FIG. 1;

FIG. 4 is a sectional view taken along line (4)-(4) of FIG. 1;

FIG. 5 is a sectional view taken along line (5)-(5) of FIG. 1;

FIG. 6 is an external view of the guide tube alone viewed from the side.

FIG. 7 is a partial vertical sectional side view showing another embodiment.

FIG. 8 is a partial vertical side view showing another embodiment.

FIG. 9 is a three-dimensional view showing a single supply rod.

FIG. 10 is a vertical sectional side view showing a conventional technique.

FIG. 11 is a three-dimensional view showing the component supply pipe of FIG. 10;

[Explanation of symbols]

 REFERENCE SIGNS LIST 50 component supply pipe 20 guide pipe 17 projection nut 27 supply rod 19 screw hole 28 guide rod 29 sliding rod 30 extrusion surface 21 groove 22 guide portion 23 temporary holding chamber 38 guide plate 40 magnet 26 guide groove

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B23K 11/14

Claims (5)

(57) [Claims] 1. A temporary fixing chamber for a projection nut is formed at a position where a component supply pipe and its guide pipe intersect, a supply rod is provided for moving forward and backward in the guide pipe, and the supply rod is provided in a screw hole of the projection nut. In the type having a guide rod that enters the pipe, a sliding rod having a diameter larger than that of the guide rod, and an extruded surface formed at the boundary between the guide rod and the sliding rod, the thickness of the guide pipe is increased. A projection nut supply device, wherein a guide portion of the projection nut and a temporary fixing chamber are formed by grooves formed on an end face of the guide tube. 2. The projection nut supply device according to claim 1, wherein a guide plate forming an inner wall of the temporary holding chamber is provided at an end of the groove, and a magnet is attached to the guide plate. 3. The slide rod of the supply rod according to claim 1, wherein the slide rod of the supply rod has a square cross-sectional shape, and the guide tube slides the slide rod in such a manner that the square cross-sectional portion exactly matches the slide rod. A projection nut supply device, characterized in that a projection nut is formed. 4. The projection nut supplying device according to claim 2, wherein the guide tube is made of a non-magnetic material. 5. A projection nut which is temporarily stopped at a predetermined position and is supplied to the projection nut. The guide rod enters a screw hole of the projection nut, and a sliding rod and a guide rod having a diameter larger than the guide rod. and it consists extrusion surface formed on the boundary portion of the sliding rod, slideways
A sliding chamber with a circular cross-section is formed in the pad, where the sliding piece
Guide rod is connected to this sliding piece,
A compression coil spring is installed in the sliding chamber, and its tension
Acts on the sliding piece so that the sliding piece hits the stopper.
A supply rod for a projection nut supply device , wherein the slide rod has a square cross section.