JPH0755352B2 - Stud bolt manufacturing equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stud bolt used for constructing a steel-framed reinforced concrete structure, that is, a stud bolt that is electrically welded to the surface of a steel frame to enhance the bondability between the steel frame and concrete. Some of them relate to a manufacturing apparatus using a multi-stage homer for manufacturing a stud bolt which is welded and joined to a wire mesh for a reinforcing bar at a head portion, in particular, a stud bolt having a current-carrying terminal attached to a welding end surface.

[0002]

2. Description of the Related Art As this type of stud bolt, in order to improve the welding performance by increasing the current-carrying efficiency during electric welding on the surface of a steel frame, the stud bolt is made of a good material such as aluminum at the center of the end surface on the welding side. It is known that an energizing terminal made of an electrically conductive material is attached. This stud bolt with a current-carrying terminal has hitherto been manufactured by a multistage homer in which a recess is formed in the center of the end face on the welding side, and a part of the current-carrying terminal made of aluminum or the like is placed in the recess of the stud bolt. Since it was manufactured by press-fitting and fixing in work, there were drawbacks that work efficiency was poor and cost was very high.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and its features are shown by the reference numerals of the embodiments described later. The stud bolt manufacturing apparatus of the present invention is a recess forming for forming a recess 48 on one end surface of a rod-shaped material 9 as the forming unit of a multistage homer for forming a stud bolt in which a plurality of forming units each including a die and a punch are arranged side by side. Unit 5
And a terminal mounting molding unit 6 for press-fitting and fixing a part of the current-carrying terminal 23 made of a good conductive material such as aluminum into the molded recess 48, and the die for the terminal mounting molding unit 6 is added. 15 rod-shaped material insertion holes 15a
Inside, a rod-shaped energizing terminal receiving die 24 having an energizing terminal receiving portion 24a at its tip, and a molded product extruding tubular rod 25 fitted to the receiving die 24 so as to be able to move in and out are disposed. In addition, the receiving die moving hole 2 of the cylindrical rod 25 moved forward from the tip of the receiving die for pushing out the molded product.
An energizing terminal supply means 27 for supplying one energizing terminal 23 is provided in the 5a, and the tubular rod 25 is moved backward by the rod-shaped material 9 pushed into the die 15 to cause the tubular rod 25 to move. The energizing terminal 23 supplied into the receiving die moving hole 25a is relatively press-fitted into the recess 48 of the end face of the rod-shaped material by the energizing terminal receiving portion 24a at the tip of the receiving die, and the rod-like energizing terminal is further provided. received
It is necessary to support the mold 24 so that it can move axially within a certain range.
In addition, the urging means 40 for urging in the advance limit direction, and the energizing terminal pressure
The detection means 41 for detecting the backward movement at the time of entry is also provided.
It is characterized in that it consists of

[0004]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. In FIG. 1A, 2 is a dimension cutting unit for cutting the wire 1 into a certain length, and 3 and 4 are stud bolts. A molding unit, 5 is a recess molding unit, and 6 is a terminal mounting molding unit. These units 2 to 6 are arranged in parallel at regular intervals to form a multistage homer. The dimension cutting unit 2 is composed of a fixed wire rod guide 7 and a cutter 8 which moves laterally, and the wire rod 1 fed from the wire rod guide 7 is cut by the cutter 8 into a rod-shaped material 9. The rod-shaped material 9 is formed by the material intermittent feeding mechanism (not shown) at each stage of the forming unit 3
Sequentially sent to ~ 6. Molding units 3-6 for each stage
Is composed of dies 12 to 15 set on the fixed base 10 and punches 16 to 19 set on the ram 11 which reciprocates. The former two molding units 3 and 4 mold the head 20 of a predetermined shape on the outer end of the rod-shaped material 9.

The recess forming unit 5 has a bar 18 at the center of the inner end surface of the rod-shaped material 9 which is pushed into the die 14 by the punch 18.
The concave portion forming die 21 set in the die 14 is used to form a concave portion for press-fitting a current-carrying terminal. The terminal mounting molding unit 6 in the final stage has one of the spherical energizing terminals 23 set by the receiving unit 22 set in the die 15 in the recess of the rod-shaped material 9 which is pushed into the die 15 by the punch 19. The part is press-fitted and fixed.

As shown in FIGS. 1B and 2, the receiving type unit 22 has a receiving portion 2 for receiving a current-carrying terminal 23 at its tip.
4a, a rod-shaped receiving mold 24, a cylindrical rod 25 for extruding a molded product, and a stopper 26 for preventing terminal drop. In addition, the receiving unit 22 is provided with an energizing terminal supply means 27. The rod-shaped receiving die 24 is located concentrically within the rod-shaped material insertion hole 15a of the die 15, and has a constant axial direction in the guide block 28 fixed in the die 15 at the rear end large diameter portion 24b. It is movably held within the range. The cylindrical rod 25 is fitted into the rod-shaped material fitting hole 15a of the die 15 so as to be movable in the axial direction within a certain range in the rod-shaped material fitting hole 15a, and the stopper 26 is provided at the tip thereof. Is attached. The stopper 26 is composed of a plurality of circumferential spheres 26a biased inward by springs so as to project into the receiving-type moving holes 25a of the cylindrical rod 25.

A guide groove 30 into which the inner end of a detent bolt 29 mounted on the die 15 is fitted to the cylindrical rod 25.
Are formed on the outer peripheral surface along the axial direction. The energizing terminal supply means 27 is formed in the peripheral wall of the cylindrical rod 25 so as to penetrate in the radial direction, and energizing terminal holding hole 31 for holding one energizing terminal 23, and the cylindrical rod 25. Is in the retracted limit position as shown in FIG. 1B, the dice 15 is formed so as to communicate with the outer end of the energization terminal holding hole 31.
1B and the energizing terminal supply pipe 32 installed side by side in FIG.
When the cylindrical rod 25 is at the retracted limit position as shown in FIG. 3, the inner end of the energization terminal holding hole 31 is closed by the receiving mold 24, and the cylindrical rod 25 moves forward as shown in FIG. The inner end of the energizing terminal holding hole 31 is sometimes opened to communicate with the receiving type moving hole 25a in the cylindrical rod 25.

The inner end of the energizing terminal supply pipe 32 is loosely fitted in a groove 33 formed along the axial direction on the outer peripheral surface of the cylindrical rod 25, and the energizing terminal holding hole 31 is It is provided in the groove 33 near the front end. Reference numeral 34 is an air inlet pipe, and as shown in FIG.
Is in the advance limit position, the receiving type moving hole 25 of the cylindrical rod 25 is passed through the concave groove 33 and the energizing terminal holding hole 31.
Introduce cleaning air into a.

As shown in FIGS. 2 and 3, the die 1 is
On the rear side of 5, a pusher rod 36 and a transmission rod 37, which are supported by a fixed guide block 35 so as to be movable in the axial direction, are arranged. The pusher rod 36 penetrates the guide block 28 fixed in the die 15, the tip of the pusher rod 36 contacts the rear end surface of the cylindrical rod 25, and the transmission rod 37 penetrates the guide block 28. Is in contact with the rear end surface of the receiving mold 24 at the rear end large diameter portion 24b. And the pusher rod 3
The rear end of 6 is a pusher 39 which is supported in the fixed cylindrical guide 38 behind the die 15 so as to be movable in the axial direction.
Of the pusher 39, the transmission rod 37 penetrates the axial center portion of the pusher 39 so as to be relatively movable, and reaches the diametrical through space portion 39a formed in the intermediate portion of the pusher 39. There is.

Reference numeral 40 designates the receiving die 24 in the advance limit direction shown in FIG. 2 via the transmission rod 37 and a lever 43 having an intermediate portion axially supported by a spindle 42 on the outside of the fixed cylindrical guide 38. Numeral 41 is a urging means for urging the receiving die 24 to detect the backward movement of the receiving die 24 during the action of press-fitting the energizing terminal via the transmission rod 37 and the lever 43. One end 43a of the lever lever 43 penetrates the fixed cylindrical guide 38, enters the through space 39a of the pusher 39, and contacts the rear end of the transmission rod 37. The urging means 40 is composed of a pressing rod 44 for pressing the side surface of the other end 43b of the lever 43 and a spring 45 for urging the pressing rod 44. The proximity switch 46 detects that the side surface of the other end 43b of the lever 43 has approached within a certain distance.

The operation of the terminal mounting molding unit 6 configured as described above will be described with reference to FIGS.
The terminal mounting molding unit 6 immediately before receiving the rod-shaped material 9 is a state in which the stud bolt 47 completed with the energizing terminal 23 attached thereto is pushed out from the die 15 by the tubular rod 25 as shown in FIG. Rod 25
Is at the advance limit position, and one energizing terminal 23 held in the energizing terminal holding hole 31 has dropped into the receiving type moving hole 25a of the tubular rod 25. The sphere 26a of the stopper 26 prevents the energizing terminal 23 from falling off the tip of the receiving type moving hole 25a.

In such a state, as shown in FIG. 4A, the rod-shaped material in which the current terminal press-fitting recess 48 is formed in the center of the end face on the side opposite to the head 20 (welding side) by the recess forming unit 5 in the preceding stage. 9 is sent to the terminal mounting molding unit 6, and the punch 19 of the unit 6 is fed as shown in FIG. 4B.
The rod-shaped material 9 is inserted into the rod-shaped material insertion hole 1 of the die 15.
It is pushed into 5a. At this time, the cylindrical rod 25 in the advance limit position is pressed by the rod-shaped material 9 and moves backward. By the backward movement of the tubular rod 25, the pusher rod 36 and the pusher 39 are integrally moved backward. The rod-shaped receiving die 24 applies the urging force of the urging means 40 (spring 45) to the lever-shaped lever 43.
Since it is received in the advancing direction via the transmission rod 37 and the transmission rod 37, it is held at the advancing limit position shown in FIG.

As the rod-shaped material 9 is pushed further inward, the inner end surface (recessed portion 48 for pressurizing the energizing terminal) approaches the tip end receiving portion 24a of the receiving die 24 waiting at the advance limit position, as shown in FIG. 4C.
As shown in FIG. 5, the energizing terminal 23 fed into the receiving die moving hole 25 a of the tubular rod 25 moves backward with respect to the receiving die 24, so that the tubular rod 25 moves backward.
The sphere 26a of the stopper 26 at the tip of the rod is pushed outward in the radial direction against the urging force of the spring and passes relatively forward, and the inner end surface of the rod-shaped material 9 (recessed portion 48 for press-fitting the current-carrying terminal) is formed. It is sandwiched between the receiving die 24 and the tip receiving portion 24a. By the pushing-in action of the rod-shaped material 9 thereafter, the receiving die 24 is pushed rearward via the current-carrying terminal 23, and as shown in FIG. 3, the receiving die 24 is biased by the biasing means 40 (spring 45). Again, the rear end large diameter portion 24b of the receiving die 24 is received by the fixed guide block 35.

Then, by the final press-fitting action of the punch 19 to the rod-shaped material 9, the inside of the rod-shaped material 9 and the tip receiving portion 24a of the receiving mold 24 whose rear end is received by the fixed guide block 35 as described above. The current-carrying terminal 23 is axially compressed between the end face (current-carrying terminal press-fitting recess 48), the current-carrying terminal 23 is press-fitted and fixed in the current-carrying terminal press-fitting recess 48 of the rod-shaped material 9, and the stud shown in FIG. 4D is shown. The bolt 47 is completed. Thereafter, the pusher 39, which has been moved backward to the backward limit position via the pusher rod 36, is pushed forward by a hammer arm (not shown), whereby the tubular rod 25 advances forward via the pusher rod 36. Moved, dice 15
The inner rod-shaped material 9 (the completed stud bolt 47) is pushed out of the die 15. At this time, the punch 19 also moves backward to the original position.

As shown in FIG. 3, when the rod-shaped material 9 causes the tubular rod 25 to move backward to the backward limit position, the current-feeding terminal holding hole 31 of the tubular rod 25 is connected to the die 15 to feed the current-feeding terminal. Since it communicates with the pipe 32, the current-carrying terminal 23 in the supply pipe 32 descends by gravity, and the lowest one current-carrying terminal 23 is dropped and held in the holding hole 31 of the cylindrical rod 25. Therefore, one energizing terminal 23 in the energizing terminal holding hole 31 is sent forward by the cylindrical rod 25 that moves forward to push out the completed stud bolt 47, and as shown in FIG. Rod 2
At the time when the stud bolt push-out ends when 5 reaches the advance limit position, one current-carrying terminal 23 in the current-carrying terminal holding hole 31 falls into the receiving-type moving hole 25a of the cylindrical rod 25 due to gravity, and the next terminal. The preparation for the mounting process is completed.

If the cylindrical rod 25 has a receiving movement hole 25.
The action of supplying the current-carrying terminal to the inside a is, for example, the current-carrying terminal supply pipe 3
2 is not normally performed due to a clogging in 2, a malfunction of the feeder that feeds the energizing terminal 23 to the supply pipe 32, or a disconnection of the energizing terminal in the hopper attached to the feeder. When the next terminal mounting step is executed while the energizing terminal 23 is not fed into the die moving hole 25a, the receiving die 24 cannot be pushed and moved rearward by the rod-shaped material 9 via the energizing terminal 23. . In other words, when the energizing terminal 23 is not interposed between the receiving die 24 and the bar-shaped material 9, even if the bar-shaped material 9 is pushed into the bar-shaped material fitting hole 15a of the die 15 to the limit, The advancing limit position of the receiving die 24 is determined so that the inner end face does not contact the tip of the receiving die 24 at the advancing limit position.

Therefore, the receiving type moving hole 2 of the cylindrical rod 25
When the energizing terminal 23 is supplied to the inside of 5a, a slight amount of backward movement of the receiving die 24, which is pressed backward by the rod-shaped material 9 through the energizing terminal 23, causes the lever lever 43 through the transmission rod 37. 3, the lever lever 43 is swung around the support shaft 42 counterclockwise by a predetermined angle against the urging force of the spring 45, and the other end 43b is moved to the proximity switch 46. Detected in close proximity to. If the energizing terminal 23 is not supplied into the receiving die moving hole 25a of the cylindrical rod 25 as described above, the receiving die 24 does not move backward from the advance limit position. The lever 43 remains in the standby position held by the urging force of the spring 45, and the proximity switch 46
Does not output a detection signal. From this, whether or not the energizing terminal 23 is attached to the end surface of the rod-shaped material 9 can be determined by the presence or absence of the detection signal of the proximity switch 46.

Although not shown, suction means using a vacuum pump for sucking up the energization terminal 23 in the supply tube 32 at the middle of the energization terminal supply tube 32 or near the end on the feeder side is used for maintenance. Can be intervened.

[0019]

As described above, the stud bolt manufacturing apparatus according to the present invention includes a multi-step homer for automatically manufacturing a stud bolt from a rod-shaped material, and a recess forming unit for forming a recess on one end surface of the rod-shaped material. This can be carried out simply by adding a terminal mounting molding unit for press-fitting and fixing a part of the current-carrying terminal made of a good conductive material such as aluminum into the molded recess. Then, in the rod-shaped material insertion hole of the die in the terminal mounting molding unit, just by pushing a predetermined stroke with a punch, a rod-shaped material having a recessed portion for terminal press-fitting fixation on the end face in the recessed portion molding unit of the preceding stage, The current-carrying terminal supplied into the receiving die moving hole of the molded product extruding cylindrical rod is axially compressed between the energizing terminal and the rod-shaped receiving die penetrating the inside of the cylindrical rod, and is then inserted into the recess. Can be fixed by press fitting. The stud bolt completed with the current-carrying terminal attached thereto can be pushed out of the die by the tubular rod for extruding the molded product.

Therefore, according to the manufacturing apparatus of the present invention, the stud bolt having the end face with the current-carrying terminal for improving the welding performance can be automatically manufactured in the multi-stage homer, and the cost can be greatly reduced. You can

Further , according to the manufacturing apparatus of the present invention, the rod-shaped energizing terminal receiving die is supported so as to be movable in the axial direction within a fixed range, and is energized in the advance limit direction.
Since the detection means for detecting the backward movement when the current-carrying terminal is press-fitted is installed together , it is possible to automatically check whether or not the press-fitting fixation operation of the current-carrying terminal is performed by the detection means. The stud bolts that are not attached can be easily removed.

Particularly, as shown in the embodiment,
At the tip of the receiving type moving hole in the output cylindrical rod,
Pushed open by energizing terminals that are relatively pushed out by the mold
When arranging the stopper for preventing the terminals from falling off,
The energizing terminal supplied in the tubular rod is inside the tubular rod.
To fall into the end face recess of the rod-shaped material
Eliminates the inconvenience of being unable to press-fit and fix
Rukoto can. Furthermore, conductive terminal as one at automatically supplying means, is drilled so as to penetrate radially into the peripheral wall of the tubular rod and one energized the tubular rod receiving die moving hole An energizing terminal holding hole for holding a terminal and an energizing terminal supply pipe attached to a die so as to communicate with the outer end of the energizing terminal holding hole when the cylindrical rod is at the retracted limit position are provided. The inner end of the current-carrying terminal holding hole is closed by the receiving mold when is in the retracted limit position, and the inner end of the current-carrying terminal holding hole is opened when the tubular rod advances. Is
By utilizing the reciprocating movement of the reciprocating molded product extruding cylindrical rod, it is possible to easily and easily realize automatic supply of the energizing terminals one by one into the cylindrical rod.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional plan view for explaining the overall configuration of a multi-stage homer, and FIG. 1B is a vertical cross-sectional side view showing a main part showing a terminal press-fitting operation state of a terminal mounting molding unit.

FIG. 2 is an overall vertical cross-sectional side view showing a stud bolt pushing operation state of the terminal mounting molding unit.

FIG. 3 is an overall vertical sectional side view showing a terminal press-fitting operation state of the terminal mounting molding unit.

FIG. 4 is a partial vertical cross-sectional side view of a main part for explaining each step of manufacturing a terminal mounting stud bolt from a rod-shaped material having a recess formed on an end surface thereof.

[Explanation of symbols]

 2 Dimension cutting unit 3 Stud bolt forming unit 4 Stud bolt forming unit 5 Recess forming unit 6 Terminal mounting forming unit 9 Rod material 15 Die 19 Punch 20 Stud bolt head 21 Recess forming mold 22 Receiving type unit 23 Spherical current terminal 24 Rod-shaped energizing terminal receiving type 24a Energizing terminal receiving part 25 Cylindrical rod for pushing out molded product 25a Receiving type moving hole 26 Terminal dropping prevention stopper 27 Energizing terminal supplying means 31 Energizing terminal holding hole (energizing terminal supplying means) 32 Energizing Terminal supply pipe (energized terminal supply means) 36 Pusher rod 37 Transmission rod 39 Pusher 40 Energizing means 41 Detecting means 43 Lever lever 46 Proximity switch (detecting means) 47 Stud bolt with terminal 48 Recess for terminal press-fitting

Claims (3)

[Claims] 1. A recess 48 formed on one end surface of a rod-shaped material 9 as the forming unit of a multistage homer for forming a stud bolt, in which a plurality of forming units each comprising a die and a punch are arranged in parallel.
A recess forming unit 5 for forming
Conductive terminal made of a good conductive material such as aluminum in 48
A terminal mounting molding unit 6 for press-fitting and fixing a part of 23 is added, and a current-carrying terminal receiving portion 24a is provided at the tip in the rod-shaped material fitting hole 15a of the die 15 in the terminal mounting molding unit 6 . A rod-shaped energizing terminal receiving mold 24 ,
With arranging the molding extruding tubular rod 25 fitted around move freely retreat out against the receiving die 24, the molded product the cylindrical rod 25 which is moved forward than the receiving-type tip for extrusion One energizing terminal in the receiving hole 25a
An energizing terminal supplying means 27 for supplying 23 is provided side by side, and the cylindrical rod 25 is moved backward by the rod-shaped material 9 pushed into the die 15 so that the cylindrical rod 25 is supplied into the receiving type moving hole 25a of the cylindrical rod 25. by conducting terminal receiving portions 24a of the conductive terminal 23 is the receiving-type tip which is to be relatively pressed into the recess 48 of the rod-shaped material end face, further
The rod-shaped energizing terminal receiving mold 24 has an axial center within a certain range.
Supports directional movement and urges in the direction toward the limit of advance
Detects the backward movement when the energizing terminal 40 is pressed in and the energizing means 40
A stud bolt manufacturing apparatus that is provided with the detection means 41 that operates together . 2. A receiving type moving hole 25 in the cylindrical rod 25 .
2. The stud bolt manufacturing apparatus according to claim 1, wherein a stopper 26 for preventing the terminal from falling off is provided at the tip of a so as to be opened by the energizing terminal 23 that is relatively pushed out by the receiving mold 24 . 3. The energizing terminal supply means 27 is provided with the cylindrical roller.
The peripheral wall of the lid 25 is drilled so as to penetrate in the radial direction and
Energizing terminal holding hole 31 for holding one energizing terminal 23
And when the cylindrical rod 25 is in the retracted limit position,
The die 15 is formed so as to communicate with the outer end of the energization terminal holding hole 31.
And the energizing terminal supply pipe 32 that is attached to the
When the rod 25 is at the retracted limit position, the energizing terminal is held.
The inner end of the hole 31 is closed by the receiving mold 24,
The energizing terminal holding hole when the rod 25 moves forward
The structure according to claim 1, wherein the inner end of 31 is opened.
The stud bolt manufacturing device described.