JP2002224823A - Structure for fitting chip of soldering iron - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure for fitting a chip with which the chip can be exchanged with one operation, and can be highly accurately positioned without position-shifting. SOLUTION: In the inner surface of a holder (10), a locking pin (15) is projectingly arranged, and in the rear end edge portion of the chip (20), a locking groove (23) is formed. The locking groove is constituted of a vertical guide groove portion (230), a horizontal groove portion (231) and a locking portion (232). The chip is relatively rotated by inserting it into the holder from the rear end portion thereof, and the locking pin is locked at the locking portion through the horizontal guide groove portion from the vertical guide groove portion in the locking groove to position and hold the chip to the holder.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chip mounting structure for a soldering iron, and more particularly, to an automatic soldering robot in which a chip can be replaced with one touch, the chip can be positioned with high accuracy, and furthermore, a position shift does not occur. Related to the structure.

[0002]

2. Description of the Related Art For example, in the case of manufacturing an electronic device, it is often the case that various electronic components are mounted on a substrate and the electronic components and wiring are soldered using a soldering iron. In such a soldering iron, a method is widely used in which a tip chip heated by a heater is brought into contact with wiring and electronic components on a substrate to melt the solder, and the tip chip is separated to solidify the molten solder.

In recent years, the above-mentioned soldering operation has also been automated, and various automatic soldering robots have been put to practical use. In such an automatic soldering robot, a soldering iron is attached to the tip of the movable arm, and the soldering work is automatically performed while moving the movable arm according to the program software. It is required that the robot be positioned with high precision with respect to the movable arm of the robot.

Therefore, in a conventional soldering iron, one or four positioning grooves are formed at the rear end edge of the base at every 90 ° in the circumferential direction, and the chip is placed on the holder side until the rear end edge hits. A method is adopted in which a positioning pin on the holder side is fitted into a positioning groove, and a chip is fixed by tightening a collect chuck or a chip holder with a lock nut.

[0005]

However, in the conventional chip mounting structure, when it becomes necessary to replace the chip, the operator holds the chip in one hand and holds the chip to the tip holder of the robot movable arm. Plug in and hold,
It was necessary to tighten the lock nut of the collect chuck and the chip holder with the other hand, and the operation was very complicated.

Further, in the case of an automatic soldering robot, a load is repeatedly applied to the chip mounting portion by the number of times of the soldering operation.
Since heat of up to 500 ° C. acts, the lock nut is apt to be loosened, and the lock nut must be strongly tightened with a tool such as a adjustable wrench or a spanner, which further complicates the tip replacement operation. Was.

Further, if the soldering operation of about tens of thousands of shots is performed even if the lock nut is strongly tightened, the lock nut naturally loosens, causing an error in the position of the tip end of the soldering robot. If you do not notice it,
There was a risk of causing a large amount of product defects.

The present invention has been made in view of the above-mentioned problems, and has as its object to provide a chip mounting structure for a soldering iron in which a chip can be replaced with a single touch, the chip can be positioned with high precision, and furthermore, no displacement occurs. Make it an issue.

[0009]

SUMMARY OF THE INVENTION Accordingly, a tip mounting structure for a soldering iron according to the present invention has a substantially cylindrical shape, and is provided with a holder which is mounted on a main body of the soldering iron and has a locking pin protruding from an inner surface thereof. A vertical guide groove portion that is open at the rear end and extends substantially in the axial direction, a lateral guide groove portion that extends substantially in the horizontal direction continuously with the vertical guide groove portion, and a locking portion that is located at the end of the horizontal guide groove portion. One or a plurality of locking grooves are formed, and are inserted into the holder from the rear end portion and relatively rotated, and the locking pin moves from the vertical guide groove portion to the horizontal guide groove portion of the locking groove. And a chip that is positioned and held by the holder by being locked to the locking portion via the locking portion.

One of the features of the present invention is that, while a locking pin protrudes from the holder, a substantially L-shaped locking groove is formed in the chip, and the chip is inserted into the holder and rotated relatively. The locking pin is moved from the vertical guide groove portion of the locking groove to the locking portion via the horizontal guide groove portion and locked by the locking portion so that the chip is positioned and held by the holder. .

[0011] Thereby, when replacing the chip, the chip can be detached and attached with one hand, and the operation can be performed with one touch.

When the locking pin is fitted into the locking portion, the chip is accurately positioned with respect to the holder, so that there is no need to worry about the positioning of the chip with respect to the holder. As a result, the operation of exchanging chips can be greatly simplified.

Further, the holder is preferably provided with a collet chuck portion for locking the chip by tightening the chuck portion and a chip holder portion for locking the chip with the cap nut, and the chip is preferably fixed by tightening the lock nut. It is possible to reliably prevent the chip from being loosened or displaced due to repeated loads and heat during the process, and to ensure high quality solderability.

That is, it is preferable that a male screw is formed on the outer surface of the holder, and a lock nut which is screwed to the male screw of the holder to lock the chip in a state of being attached to the holder is further provided.

It is preferable that the vertical guide groove portion of the locking groove is formed in the axial direction of the chip. It can pass through the guide groove portion. In that sense, the claims use the expression “extending substantially in the axial direction”.

The lateral guide groove portion of the locking groove may be formed to extend in a direction perpendicular to the axis of the chip, or may be formed to be inclined upward or downward. In that sense, the claims use the expression “extending in the lateral direction”.

The shape of the locking portion of the locking groove is not particularly limited as long as the locking pin can be locked and positioned and held, for example, a hole or a step having a shape corresponding to the shape of the locking pin. Can be.

In the above description, the locking pin is provided on the holder side and the locking groove is provided on the chip side. However, the reverse configuration may be adopted.

That is, the chip mounting structure for a soldering iron according to the present invention has a substantially cylindrical shape, is attached to the body of the soldering iron, and has a vertical guide groove portion which is open at the tip and extends substantially in the axial direction. A holder in which one or a plurality of locking grooves formed of a lateral guide groove portion extending substantially in the lateral direction continuously with the groove portion and a locking portion located at the end of the lateral guide groove portion; A locking pin protrudes from the rear end portion and is inserted into the holder and relatively rotated, and the locking pin is locked from a vertical guide groove portion of the locking groove to a horizontal guide groove portion. And a chip that is positioned and held by the holder by being locked to the holder.

In the present invention, the holder and the locking groove are the same as in the case of the above-mentioned invention, and the description thereof will be omitted.

The present invention can be applied to a hand-held soldering iron. However, when the present invention is applied to an automatic soldering robot in which the number of times of soldering is extremely large, the effect is further enhanced.
Here, the soldering iron body corresponds to a grip or its mounting base in the case of a hand-held type, and corresponds to a movable arm or its mounting base in the case of an automatic soldering robot.

In the above two inventions, the locking pin and the locking groove are used. However, the same effect can be obtained by using the fitting between the locking ball and the locking hole which is biased by the spring.

In other words, the chip mounting structure of the soldering iron according to the present invention has a substantially cylindrical shape, is mounted on the body of the soldering iron, and has an inner surface on which a locking member is protruded by being biased by a spring member. And one or more locking recesses are formed on the outer surface of the rear end portion, inserted into the holder from the rear end portion and rotated relatively, and the locking member fits into the locking recess. And a chip positioned and held by the holder.

According to the present invention, there is provided a chip mounting structure for a soldering iron, which has a substantially cylindrical shape, is mounted on the body of the soldering iron, and has one or a plurality of locking recesses formed on an inner surface thereof, and a rear end portion. A locking member is urged and protruded from the outer surface by a spring member, inserted into the holder from the rear end portion and relatively rotated, and the locking member fits into the locking recess. And a chip that is positioned and held by the holder.

In the present invention, when the chip is inserted into the holder and rotated relatively, the locking member urged in the projecting direction is fitted when the locking member matches the locking recess, and the chip can be positioned in the holder. When the tip is replaced, the tip can be removed and attached with one hand, and the operation can be performed with one touch.

When the locking member is fitted into the locking recess, the chip is accurately positioned with respect to the holder, so that there is no need to worry about the positioning of the chip with respect to the holder. As a result, the operation of exchanging chips can be greatly simplified.

Further, the holder is preferably provided with a collet chuck portion for locking the chip by tightening the chuck portion and a chip holder portion for locking the chip with the cap nut, and the chip is preferably fixed by tightening the lock nut. It is possible to reliably prevent the chip from being loosened or displaced due to repeated loads and heat during the process, and to ensure high quality solderability.

It is sufficient that the locking member fits into the locking recess. For example, a locking pin can be used. However, in consideration of a layout space and a smooth locking operation, it is preferable to use a locking ball. Good. Further, the spring member may be a coil spring, but in consideration of a layout space, a leaf spring is preferably used.

Hereinafter, the present invention will be described in detail with reference to specific examples shown in the drawings. 1 to 4 show a preferred embodiment of a chip mounting structure for a soldering iron according to the present invention. In the figure, a holder 10 has a substantially cylindrical shape, and can be attached to a movable arm (not shown) of an automatic soldering robot by a known mechanism. This holder 1
The four collet chucks 11 are integrally formed on the leading end of the zero, and the male screw 12 is formed behind the collet chuck 11.

A supply hole 13 for a high-temperature inert gas is formed between the large diameter portion 19 and the male screw portion 12 at substantially the center of the holder 10, and a rod-shaped heater 30 is provided at the rear end of the holder 10.
Are formed.

On the inner surface of the holder 10, a step 110 for positioning the rear edge of the metal cover 22 of the chip 20 is formed in front of the inert gas supply hole 13, and a locking pin 15 projects in front of the step 110. Has been established.

The metal cover 22 of the chip 20 is inserted into the holder 10 from the tip side. This chip 20
In this case, the tapered chip main body 21 is formed of a metal material having good thermal conductivity, for example, a copper-based material, and a hollow heat retaining section 25 is disposed behind the chip main body 21. The chip body 21 and the heat retaining portion 25 are integrally formed of a metal material, for example, a copper-based material, and are covered with a cover 22 made of metal, for example, a titanium-based material.

A plurality of pores 24 are provided at the tip of the heat retaining section 25.
Are formed so as to communicate the periphery of the chip body 21 and the inside of the heat retaining section 25, and the high-temperature inert gas supplied from the supply hole 13 is jetted around the chip body 21. I have.

The rear edge of the metal cover 22 has
The two locking grooves 23 are formed to face each other. The locking groove 23 includes a vertical guide groove portion 230 and a horizontal guide groove portion 2.
The vertical guide groove portion 230 is opened at the rear end of the metal cover 22 and extends in the axial direction. The horizontal guide groove portion 231 is continuous with the vertical guide groove portion 230 in the axial direction. Extending in the vertical direction, the locking portion 232 has a substantially circular shape and is provided at the end of the horizontal guide groove portion 231, and the locking portion 232 is provided with the holder through the vertical guide groove portion 230 and the horizontal guide groove portion 231. Ten locking pins 13 are locked.

Further, a rod-shaped heater 30 is inserted into the holder 10 from the rear end side up to the inside of the heat retaining portion 25 of the chip 20.
The rod-shaped heater 30 is provided with a locking hole 1 at the rear end of the holder 10.
The clips 50 and 4 are locked and retained by clips 50 fitted into the clips.

A seal ring 31 is attached to the rear end portion of the rod-shaped heater 30 to prevent the high-temperature inert gas supplied from the supply hole 13 of the holder 10 from leaking to the rear in close contact with the inner surface of the holder 10. It is supposed to.

Further, the male screw portion 1 on the distal end side of the holder 10
2, a lock nut 40 is screwed into the lock nut 4.
Numeral 0 tightens the collet chuck 11 to lock the chip 20 in a state of being attached to the holder 10.

When replacing the chip 20, the lock nut 40 is loosened and removed, and the chip 20 is rotated in the circumferential direction. As a result, the locking pin 15 of the holder 10 is locked by the locking portion of the locking groove 23 of the chip 10. 232 and moves along the lateral guide groove portion 231. When the locking pin 15 reaches the position of the lower end of the vertical guide groove portion 230, the locking pin 15 can escape upward along the vertical guide groove portion 230, so that the chip 20 can be easily pulled out from the holder 10. it can.

Next, when a new chip 20 is inserted into the holder 10 from the rear end side, as shown in FIG.
The rear edge of the metal cover 22 of the chip 20 is
In this state, the tip 20 is rotated, and when the locking pin 15 reaches the position of the upper end of the vertical guide groove portion 230 of the locking groove 23, the locking pin 15 is
Can be moved down along.

When the chip 20 is further inserted until it comes into contact with the step 110 of the holder 10, the locking pin 15 comes to the position of the lateral guide groove portion 231 of the locking groove 23. The pin 15 moves along the lateral guide groove portion 231, and the locking portion 232 of the locking groove 23
Is fitted and locked.

As a result, the tip 20 is positioned and held at an accurate position with respect to the holder 10, and thereafter, when the lock nut 40 is tightened, the tip 2
0 can be locked to the holder 10.

As described above, when the chip 20 is replaced, when the locking pin 15 is locked to the locking portion 232 of the locking groove 23, the chip 20 is positioned with high precision, and the replacement operation is very simple. And can be performed with one hand.

Further, even if the soldering operation of tens of thousands of shots is performed, no displacement occurs in the chip 20, and a high-quality soldering operation can be performed.

FIG. 5 shows a modification of the above embodiment. The lateral guide groove portion 231 of the locking groove 23 may be inclined obliquely downward as shown in FIG. As shown in (b), it may be inclined obliquely downward.

FIG. 6 shows another embodiment, in which the same reference numerals as those in FIGS. 1 to 5 indicate the same or corresponding parts. In this example, a plurality of steel balls (locking members) 16.
Are protruded from the inner surface, and the steel balls 16 are urged in the protruding direction by a leaf spring (spring member) 17, and the leaf spring 17 is fixed to the holder 10 by a spring retainer and a locking ring 18. Have been. On the other hand, holes (locking recesses) 26... Are formed in the rear end portion of the metal cover 22 of the chip 20, and steel balls 16.

Therefore, in this example, the chip 20 is placed in the holder 1
0, the steel balls 16... Are pushed in against the spring force of the leaf spring 17, and when the holes 26. Protruding hole 26
, And the chip 20 is accurately positioned and fixed with respect to the holder 10. When removing the chip 20, the chip 20 may be pulled out strongly.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view illustrating a preferred embodiment of a chip mounting structure for a soldering iron according to the present invention.

FIG. 2 is a sectional view showing a holder according to the embodiment.

FIG. 3 is a sectional view showing a chip in the embodiment.

FIG. 4 is a diagram for explaining the operation of the embodiment.

FIG. 5 is a diagram showing a modification of the embodiment.

FIG. 6 is a cross-sectional view of a main part showing another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Holder 11 Collet chuck part 12 Male screw part 15 Lock pin 16 Steel ball (lock member) 20 Chip 23 Lock groove 230 Vertical guide groove part 231 Horizontal guide groove part 232 Lock part 26 hole (lock recess)

Claims (5)

[Claims] 1. A holder having a substantially cylindrical shape, attached to a soldering iron main body, having a locking pin protruding from an inner surface thereof, a vertical guide groove portion opened at a rear end and extending substantially in an axial direction, and a vertical guide groove portion. One or a plurality of locking grooves formed of a lateral guide groove portion extending substantially in the lateral direction continuously to the guide groove portion and a locking portion located at the end of the horizontal guide groove portion are formed, and the holder is formed from a rear end portion. And is relatively rotated, and the locking pin is locked by the locking portion through the horizontal guide groove portion from the vertical guide groove portion of the locking groove to be positioned and held by the holder. A chip mounting structure for a soldering iron, comprising: 2. A longitudinal guide groove which is substantially cylindrical, is attached to the soldering iron body, is open at the tip and extends substantially in the axial direction, and a lateral guide extending substantially laterally continuously from the longitudinal guide groove. A holder having one or more locking grooves formed of a groove portion and a locking portion located at the end of the lateral guide groove portion; a locking pin protruding from the outer surface of the rear portion; It is inserted into the holder and relatively rotated, and the locking pin is positioned on the holder by being locked by the locking portion from the vertical guide groove portion of the locking groove to the horizontal guide groove portion. A chip mounting structure for a soldering iron, comprising: a chip held together with the chip. 3. A holder having a substantially cylindrical shape, which is attached to the soldering iron body, and whose inner surface is provided with a locking member urged by a spring member to protrude, and one or more locking members on the outer surface of the rear end portion. A chip in which a recess is formed, which is inserted into the holder from the rear end portion and is relatively rotated, and which is positioned and held by the holder by fitting the locking member into the locking recess. And a chip mounting structure for a soldering iron. 4. A holder which has a substantially cylindrical shape, is attached to a soldering iron body, and has one or a plurality of locking recesses formed on an inner surface thereof, and a locking member biased by a spring member on an outer surface of a rear end portion. And a tip that is inserted into the holder from the rear end portion and relatively rotated, and is positioned and held by the holder by fitting the locking member into the locking recess. And a chip mounting structure for a soldering iron. 5. An external thread is engraved on an outer surface of the holder, and a lock nut which is screwed to the external thread of the holder to lock the chip in a state of being attached to the holder is further provided. 4. The chip mounting structure for a soldering iron according to any one of 4.