JP2010075961A - Consecutive riveter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a consecutive riveter constituted so that even in the case that the size of the riveter is same as or smaller than that of the conventional riveter, a range for vertically moving a jaw case piston and a nose piston is long, and a jaw case and a cylindrical body are extended longer from a chuck ring. <P>SOLUTION: The jaw case piston 106 at the upper part and the nose piston 107 at the lower part thereof, are freely slidably inserted into the chuck cylinder 101; and the upper part of the jaw case piston 106 into an upper part air chamber 108a, the interval between the jaw case piston 106 and the nose piston 107, into an intermediate chamber 108 and the lower part of the nose piston 107 into a lower part air chamber 108c, are respectively demarcated with the jaw case piston 106 and the nose piston 107; and further, the cylindrical body 110 extended to the outer part of the chuck cylinder 101 to the nose piston 107 and the cylindrical jaw case 109 vertically moved into the cylindrical body 110 to the jaw case piston 106, are respectively fixed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a continuous riveter capable of continuously hitting blind rivets (hereinafter referred to as rivets) for caulking sheet metal or the like.

  Conventionally, the continuous riveter shown in patent document 1 is provided by the present applicant. As shown in FIGS. 7 to 20, the continuous riveter includes a main body D, a drive unit E, a rivet supply unit F, and a valve unit G.

The drive unit E includes a small-diameter oil cylinder 1 branched sideways from the main body D and a large-diameter air cylinder 3 that drives the oil piston 2 of the oil cylinder 1.
An oil piston 2 as a piston rod is integrally formed with the piston 7 housed in the air cylinder 3.
The oil cylinder 1 communicates with the chuck cylinder 8 through a hole 18 communicating with an oil chamber 16 which is a space formed between the jaw case piston 20 and the nose piston 28 in the chuck cylinder 8.
P2 is a second port for supplying pressurized air to the piston front chamber 4 of the air cylinder 3 and the air chamber 15 (FIG. 11) between the nose piston 28 and the rod cover 17, respectively. It communicates with the other port f (FIG. 8).
P1 is a first port that supplies pressurized air to the rear chamber 5 (FIG. 9), which is the piston rear position of the air cylinder 3, and communicates with a port e on the outlet side of the operation valve 53 described later.
P3 is a third port for supplying the pressure air in the rear chamber 5 of the air cylinder 3 to the pilot air circuit Y of the operation valve 53 when the piston 7 moves forward (FIG. 9).
A storage case 47 of the rivet supply unit F is fixed to the lower end of the air cylinder 3 by a pin 27.

The main body D has a chuck cylinder 8 integrally formed at a substantially right angle with the oil cylinder 1, and a core shaft collecting case 9 in which a core shaft R 1 with a rivet R cut is housed is mounted in the upper portion thereof. A rivet supply unit F is attached to the.
A vacuum ejector 12 is attached to the upper end of the core shaft recovery case 9 to evacuate the core shaft recovery case 9.
A rod cover 17 is attached to the lower end of the chuck cylinder 8, and a jaw case piston 20 is housed inside the chuck cylinder 8, which is a bowl-shaped piston with an open upper end, whereby an upper air chamber 14 and a lower oil chamber. 16 is mounted in a state where it is defined.
The lower part of the jaw case piston 20 is a cylindrical jaw case 21, which is fixed to the lower end of the bowl-shaped piston. A tapered surface 22 having a smaller diameter toward the tip is formed on the inner surface of the tip of the jaw case 21, A pair of jaws 25 are slidably fitted on the tapered surface 22.
Each jaw 25, 25 is urged downward by a spring 23 housed in the jaw case 21 via a sharp jaw pusher 24.
The core shaft recovery pipe 13 is inserted into the jaw case 21 and the upper portion thereof is inserted into the jaw shaft 21 while penetrating the bottom plate of the core shaft recovery case 9.

A nose piston 28 is disposed below the jaw case piston 20 to define an upper oil chamber 16 and a lower air chamber 15, and a cylinder 29 formed at the lower end of the nose piston 28 includes the chuck. The rod cover 17 is slidably inserted into the rod cover 17 at the lower end of the cylinder 8 so as to go out of the cylinder 8, and a nose piece 32 is attached to the lower end of the cylindrical body 29.
7, 11, 12, and 13, the tip of the jaw case 21 is formed on the lower wall 30 (FIG. 16) of the cylindrical body 29, and the nose piece 32 that protrudes in a V shape from the lower wall 30. The tips of the jaws 25 are in contact with each other.

The vacuum ejector 12 is always operated during use of the continuous riveter, and the core shaft R1 of the rivet R cut at the time of caulking is sucked through the core shaft recovery pipe 13 and recovered in the core shaft recovery case 9, The rivet R inserted into the jaw 25 portion of the jaw case 21 from the nose piece 32 of the cylindrical body 29 of the nose piston 28 is held by the suction force of the vacuum ejector 12. For this purpose, the vacuum ejector 12 is directly connected to the pressure source 50 through a pipe line 60.
With this configuration, the vacuum ejector 12 can always be operated when the continuous riveter is used. Therefore, the core shaft recovery pipe 13 and the nosepiece 32 and the jaw 25 at the tip of the cylindrical body 29 have a core. A suction force can always be applied via the shaft recovery pipe 13. Accordingly, the core shaft R1 of the rivet R cut at the time of caulking can be recovered to the core shaft recovery case 9 via the core shaft recovery pipe 13, and the rivet R inserted into the nose piece 32 from the tip of the cylindrical body 29. It can also be held so as not to fall off by suction.

The rivet supply unit F includes a tape air cylinder 37 (see FIG. 15), a guide plate 43, and a storage case 47 for the rivet holding band T, as shown in FIGS. 7, 9, 11 to 13 and 15. To do.
As shown in FIG. 15, a tape piston 39 urged in the return direction by a spring 38 is accommodated in the tape air cylinder 37. The tape piston 39 is fixed to the shaft 40 of the tape piston 39. The feed claw 41 is provided.
The guide plate 43 has a U-shaped cross section in accordance with the rivet holding band T so as to guide the rivet holding band T, and a long hole 44 is opened on a vertical surface thereof. The feed claw 41 protrudes from the top to the bottom. Further, on the vertical surface of the guide plate 43, there is provided a spring plate 46 for pressing and guiding the vertical portion of the rivet holding band T as shown in FIG.

As shown in FIG. 20, the blind rivet holding band T (hereinafter referred to as a rivet holding band) is formed in a long body having a U-shaped cross section with synthetic resin, paper, or the like. A pair of upper tabs T1 and lower tabs T2 are arranged at regular intervals with a spacing T7. Feed holes T4 are drilled at regular intervals in the vertical portion T3, through holes T5 are provided in the upper and lower tabs T1, T2, and rivets R are inserted into the through holes T5 of the upper and lower tabs T1, T2 from below the lower tab T2. The head R3 is inserted into contact with the upper surface of the lower tab T2.
Such a rivet holding band T is wound around and stored in the storage case 47 and is sent out from the front end side through the guide plate 43. This feeding is performed by the reciprocating motion of the tape air cylinder 37 by the tape piston 39 when the feeding claw 41 is engaged with the feeding hole T4 of the rivet holding band T.

The valve portion G is as shown in FIGS. 8, 10 and 14, 53 is an operation valve, which is attached to the position indicated by the chain line of the air cylinder 3, is a 2-position pilot switching valve, 49 is a trigger valve, The oil cylinder 1 and the chuck cylinder 8 are attached at the position indicated by the inner chain line where they intersect, and the push button 51 is pushed or released.
In the figure, reference numeral 50 denotes a pressure source such as a compressor, h and o are open to the atmosphere, and outlet ports e and f of the operation valve 53 communicate with the first and second ports P1 and P2, respectively. The third port P3 communicates with the pilot air circuit Y.
The outlet port m of the trigger valve 49 communicates with the pilot air circuit X of the operation valve 53 and the fourth port P4 at the upper end of the chuck cylinder 8, and the port n communicates with the inlet port g of the operation valve 53. is doing.
Further, the rod cover 17 is provided with a fifth port P5. When the air chamber 15 communicates with the port k of the tape air cylinder 37 through the fifth port P5, the nose piston 28 rises to the top dead center. (FIG. 13) The pressurized air in the air chamber 15 is supplied from the groove 31 below the cylindrical body 29 to the tape air cylinder 37 through the port P5 (FIG. 14).

The conventional continuous riveter operates as follows.
Usually, the continuous riveter storage case 47 is stored in a state where the rivet holding band T is wound, and when it is not caulked, it is in the state shown in FIGS. 7 and 8, and the push button 51 (trigger) is released, The rivet R is sucked into the nose piece 32 so as not to fall downward by the suction force of the vacuum ejector 12.
As shown in FIG. 9, when the rivet main body R2 of the rivet R is inserted into the hole of the sheet metal 48 and the push button 51 is pressed, the trigger valve 49 moves as shown in FIG. Through the port g → e of the valve 53, it flows from the first port P1 into the rear chamber 5 of the air cylinder 3, and the piston 7 moves forward, so that the oil piston 2 also moves forward, and the oil in the oil chamber 6 moves to the chuck cylinder 8 Therefore, the jaw case piston 20 is pushed up by a predetermined distance. Therefore, the jaw case 21 rises.

In this case, the pair of jaws 25 are urged downward by the springs 23 via the jaw pushers 24 and stopped against the nose piece 32. However, when the jaws 25 are separated from the contact of the nose piece 32, the springs are moved. The urging force of 23 moves downward while sliding on the tapered surface 22 of the jaw case 21, and moves up while approaching the taper surface 22 while grasping the core axis R 1 of the rivet R. The rise of the core shaft R1 causes the rivet R to be caulked, and then the head shaft R3 of the rivet R is stopped at the tip of the nose piece 32, so that the core shaft R1 is cut.
In this case, since the air chamber 15 and the front chamber 4 of the air cylinder 3 are released to the atmosphere from the second port P2 through the port f → h of the operation valve 53, the nose piston 28 is pressed downward, and the jaw case Only the piston 20 rises.

When the piston 7 moves forward, the pressure air in the piston rear chamber 5 is supplied to the pilot air circuit Y through the third port P3, and the operation valve 53 is moved forward, so that the pressure air from the pressure air source 50 is as shown in FIG. The gas is supplied from the second port P2 to the piston front chamber 4 and the air chamber 15 of the chuck cylinder 8 through the ports S → n → g → f. Accordingly, as shown in FIGS. 11 to 13, the Geecase piston 20 and the nose piston 28 rise to the top dead center, and the oil piston 2 returns when the piston 7 returns.
At this time, the pressure air in the rear chamber 5 of the air cylinder 3 passes through the port e → h from the first port P1, the pressure air in the pilot air circuit X passes through the port m → o, and the pressure air in the air chamber 14 passes through the fourth port. From P4, each port is opened to the atmosphere through port m → o.

In FIG. 11, the oil piston 2 returns (naturally, the piston 7 also returns), the nose piston 28 rises and returns to a position approaching the saddle-shaped piston, and pressurized air is blown into the vacuum ejector 12. A vacuum acts in the collection case 9. Further, the nose piston 28 rises with respect to the jaw case piston 20, the lower wall 30 of the cylindrical body 29 comes into contact with the lower end of the jaw case 21, and the upper end of the nose piece 32 pushes up the tip of the jaw 25, so that the jaw 25 is released. The cut core shaft R1 is recovered in the core shaft recovery case 9.
FIG. 12 shows a state where the jaw case piston 20 and the nose piston 28 are rising, and shows a state in which the core shaft R1 is sucked into the core shaft recovery case 9 through the core shaft recovery pipe 13.

  FIG. 13 shows a state where both the jaw case piston 20 and the nose piston 28 are at the top dead center. At this time, since the pressurized air is supplied from the fifth port P5 to the port K of the tape air cylinder 37, the tape The piston 39 advances, the feed claw 41 advances along the long hole 44, and the feed claw 41 engaged with the feed hole T4 of the rivet holding band T pulls the rivet holding band T out of the storage case 47 and guides the guide plate. The tip of the core shaft R1 is set on the axis below the nosepiece 32 by moving by one pitch along 43.

Next, when the push button 51 is released, the valve portion G is in the state shown in FIG. 8, and the trigger valve 49 returns to its original position by the force of the spring 52, so that the pressure air from the pressure source 50 passes through the port m and Since the pilot air circuit X is supplied, the operation valve 53 also moves backward. At this time, the pressure air in the pilot air circuit Y passes through the ports P3 → P2 and is released from the port f → h to the atmosphere.
In the position of the valve, the pressure air is supplied to the air chamber 14 from the fourth port P4 through the port s → m of the trigger valve 49, and the pressure air in the air chamber 15 is released into the atmosphere through the port P2 → f → h, Since both the jaw case piston 20 and the nose piston 28 descend to the bottom dead center, the core shaft R1 of the rivet R is held by the jaw 25 opened through the nose piece 32 and the tip of the nose piece 32 is moved. The upper and lower tabs T1, T2 of the rivet holding band T are bent downward and lowered. The lowering of the nosepiece 32 will be described later with reference to FIGS.

When the nosepiece 32 is lowered, the supply of the pressure air to the tape air cylinder 37 is stopped and the pressure air of the tape air cylinder 37 is released, so that the tape piston 39 is moved back to the original position by the action of the spring 38. Since T is stopped in the reverse direction by the check pawl 45 (see FIG. 15), the feed claw 41 moves away from the feed hole T4 and moves one pitch forward while the rivet holding band T is stopped. Is engaged with the feed hole T4.
At this time, the rivet holding band T is elastically pressed against the guide plate 43 by the guide (preventing deviation) spring plate 46, so that the rivet holding band T is reliably engaged with the feed claw 41 without being displaced.
Thus, preparation for the next caulking of the rivet T is completed.
The subsequent operation is the same as the description of the operation described above, and the rivet R can be continuously caulked by repeating the above operation.
JP 2003-103336 A

  However, this conventional continuous riveter includes a main body D and a drive unit E, and the drive unit E has a small diameter oil cylinder 1 branched sideways from the main body D and a large diameter for driving the oil piston 2 of the oil cylinder 1. The piston rod of the piston 7 of the air cylinder 3 is integrally formed as the oil piston 2 of the oil cylinder 1, and the oil cylinder 1 includes the jaw case piston 20 and the nose piston 28 in the chuck cylinder 8. Between the chuck cylinder 8 and a hole 18 communicating with an oil chamber 16 which is a space formed between the chuck cylinder 8 and the oil chamber 16. A jaw case piston 20 built in the chuck cylinder 8 defines an upper air chamber 14 and a lower oil chamber 16. A cylindrical jaw case 21 is fixed to the lower portion of the jaw case piston 20. A nose piston 28 is disposed below the jaw case piston 20 to define an upper oil chamber 16 and a lower air chamber 15. A cylindrical body 29 is formed at the lower end of the nose piston 28. The jaw case 21 is moved up and down by the jaw case piston 20, and the cylindrical body 29 is moved up and down by the nose piston 28.

  Therefore, the range in which the jaw case 21 moves up and down is the range in which the jaw case piston 20 can be moved up and down, and the range in which the cylindrical body 29 moves up and down is the range in which the nose piston 28 can move up and down. However, in the conventional continuous riveter, the oil cylinder 1 communicates with the chuck cylinder 8 through the hole 18 communicating with the oil chamber 16 that is a space formed between the jaw case piston 20 and the nose piston 28 in the chuck cylinder 8. Therefore, the range in which the jaw case piston 20 and the nose piston 28 can move up and down is short, and therefore the range in which the jaw case 21 and the cylinder 29 can move up and down is also short. There is a problem that 29 cannot go out longer than the chuck cylinder 8. On the other hand, if the jaw case 21 and the cylinder 29 are moved out longer than the chuck cylinder 8 to increase the vertical movement range of the jaw case piston 20 and the nose piston 28, the chuck cylinder 8 is made long and large. Therefore, the continuous riveter becomes heavy, and a problem that lacks practicality arises.

  The present invention has been proposed to solve such problems, and even if the purpose is the same as or smaller than the conventional one, the range in which the jaw case piston and the nose piston can move up and down is long, The present invention is to provide a continuous riveter configured such that the jaw case and the cylindrical body can go out longer than the chuck cylinder.

In order to solve the above-mentioned problems, a continuous riveter according to the present invention has a jaw case piston inserted into a chuck cylinder and a nose piston slidably inserted below the chuck cylinder. The jaw case piston and the nose piston serve as a jaw case. The upper part of the piston is defined in the upper air chamber, the area between the jaw case piston and the nose piston is defined in the intermediate air chamber, and the lower part of the nose piston is defined in the lower air chamber.
A cylindrical body extending outside the chuck cylinder is fixed to the lower part of the nose piston, and can be moved up and down by the nose piston. A cylindrical jaw case that moves up and down in the cylindrical body is fixed to the jaw case piston. It can be moved up and down by the jaw case piston,
The chuck cylinder is provided with a first port that communicates with the upper air chamber, a second port that communicates with the intermediate air chamber, and a third port that communicates with the lower air chamber, and the second port is an upper air chamber of the chuck cylinder. One end of an expandable and contractible spiral pipe disposed in a free state is connected to the second port, the other end is connected through the jaw case piston and communicated with the intermediate air chamber,
The jaw case is formed with a hole at the tip, and a tapered surface is formed on the inner surface of the tip so as to reduce the diameter toward the tip with the hole as a center. A pair of jaws that are urged downward through the sleeve are slidably inserted, and grip the core shaft of the blind rivet inserted into the hole at the lower end of the cylindrical body directly from the outside or through the nosepiece. Open,
A core shaft recovery pipe is connected to the upper end of the jaw case, and communicates with the core shaft storage case or the outside of the cylinder. A vacuum ejector is connected to the core shaft recovery pipe, and the core shaft of the blind rivet is cut during caulking. Is sucked and discharged through the core collecting pipe, and is always operated during use to hold the blind rivet inserted into the jaw portion of the jaw case from the tip of the cylinder of the nose piston with the suction force of the vacuum ejector. It is characterized by that.

Thus, in the continuous riveter, a jaw case piston is slidably inserted into the chuck cylinder, and a nose piston is slidably inserted below the chuck cylinder, and the upper part of the jaw case piston is placed in the upper air chamber. The intermediate air chamber is defined between the jaw case piston and the nose piston, and the lower part of the nose piston is defined in the lower air chamber.
A cylindrical body extending outside the chuck cylinder is fixed to the lower part of the nose piston, and can be moved up and down by the nose piston. A cylindrical jaw case that moves up and down in the cylindrical body is fixed to the jaw case piston. It can be moved up and down by the jaw case piston,
The chuck cylinder is provided with a first port that communicates with the upper air chamber, a second port that communicates with the intermediate air chamber, and a third port that communicates with the lower air chamber, and the second port is an upper air chamber of the chuck cylinder. One end of the expandable / contractible spiral pipe disposed in a free state is connected to the second port, and the other end is connected through the jaw case piston to communicate with the intermediate air chamber.
Accordingly, the pressurized air can be supplied from the first port to the upper air chamber, the pressurized air in the upper air chamber can be discharged to the atmosphere, the pressurized air can be supplied from the second port to the intermediate air chamber, The air can be discharged to the atmosphere, and the pressurized air can be supplied from the third port to the lower air chamber, or the compressed air in the lower air chamber can be discharged to the atmosphere. As a result, the vertical movement of the jaw case piston and the nose piston can be driven. However, since the first port and the second port are provided in the upper part of the chuck cylinder, the jaw case piston and the nose are almost entirely in the chuck cylinder. The piston can be moved up and down, and even if the overall length of the chuck cylinder is the same as or smaller than that of the conventional case, the range in which the jaw case piston and the nose piston can move up and down can be lengthened, and the jaw case and cylinder can be moved out longer than the chuck cylinder.

  In the conventional continuous riveter, since the hydraulic passage of the hydraulic cylinder is provided substantially in the middle of the chuck cylinder, the range of the vertical movement of the jaw case piston and the nose piston is limited, and the movement range of the vertical movement cannot be lengthened. Compared to the fact that the jaw case and the cylinder cannot go out longer than the chuck cylinder, it can be seen that the continuous riveter of the present invention allows the jaw case and the cylinder to go out longer than the chuck cylinder.

The continuous riveter of the present invention guides a storage case stored in a state where a belt-like blind rivet holding band with a blind rivet is wound and the blind rivet holding band along a guide plate, A rivet supply unit having a tape air cylinder for supplying one blind rivet attached to a blind rivet holding belt;
A lower port of the chuck cylinder is provided with a fourth port communicating with the tape air cylinder.

  Accordingly, the pressurized air supplied to the lower air chamber of the chuck cylinder can be used for driving to supply the blind rivet to a predetermined position by supplying it to the tape air cylinder via the fourth port.

According to the continuous riveter of the present invention, the following effects can be obtained.
(1) The jaw case piston and the nose piston can be moved up and down substantially over the entire length of the chuck cylinder, and the range in which the jaw case piston and the nose piston can move up and down is increased even if the overall length of the chuck cylinder is the same as or smaller than the conventional one. The jaw case and the cylinder can go out longer than the chuck cylinder.
(2) Therefore, the jaw case and the cylindrical body can reach even in deep grooves and holes, so that riveting can be performed even in deep grooves and holes in which the riveter body cannot be inserted.
(3) The pressurized air after being supplied to the lower air chamber of the chuck cylinder and used for driving the nose piston can be supplied to the tape air cylinder via the fourth port and used to drive the blind rivet.
(4) Since there is no conventional drive unit E (oil cylinder, large-diameter air cylinder, etc.), the weight can be reduced correspondingly, and the burden on the operator can be reduced.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is an enlarged sectional view showing the vicinity of a jaw case, a cylindrical body and a nose piece of the present invention, and FIG. 3 is a sectional view showing the next operating state of FIG. 4 is a sectional view showing the next operating state of FIG. 3, FIG. 5 is a sectional view showing the next operating state of FIG. 4, and FIG. 6 is a sectional view showing the next operating state of FIG. The continuous riveter includes a main body D, a rivet supply unit F, and a valve unit G.

The main body D is composed of a chuck cylinder 101. A handle 102 is fixed in a horizontal direction at a substantially right angle in the middle of the chuck cylinder 101, and the inside of the handle 102 is a valve portion G. A rivet supply unit F is attached to the outside of the lower part of 101.
A core shaft collection case 103 for storing the core shaft R1 from which the rivet R is cut is mounted in the upper portion of the chuck cylinder 101, and a vacuum ejector 104 for evacuating (depressurizing) the inside of the core shaft collection case 103 is installed at the upper end. The lower end of the chuck cylinder 101 is closed with a rod cover 105.

In the chuck cylinder 101, a jaw case piston 106 is slidably mounted on the upper side, and a nose piston 107 is slidably mounted on the lower side of the chuck cylinder 101. The upper part of the jaw case piston 106 is the upper air chamber 108a. Further, the intermediate air chamber 108b is defined between the jaw case piston 106 and the nose piston 107, and the lower portion of the nose piston 107 is defined in the lower air chamber 108c. The jaw case piston 106 is slidable in a state in which an upper air chamber 108a and a lower intermediate air chamber 108b are defined above the jaw case piston 106, and a nose piston 107 is slidable in an upper air chamber 108b and a lower lower air chamber 108b. The air chamber 108c is slidable in a defined state.
A cylindrical body 110 that passes through the rod cover 105 at the lower end of the chuck cylinder 101 and extends outside the chuck cylinder 101 is fixed to the lower portion of the nose piston 107 and can be moved up and down by the nose piston 107. A cylindrical jaw case 109 that moves up and down in the cylindrical body 110 is fixed, and can be moved up and down by the jaw case 109.

The cylindrical jaw case 109 is provided with a hole at the tip, and a tapered surface 111 having a smaller diameter around the hole is formed on the inner surface of the tip. The tapered surface 111 has a pair of jaws 112. 112 are slidably inserted. Each of the jaws 112 and 112 is urged downward by a spring 113 housed in the jaw case 109 via a sharp jaw pusher 114. A core shaft recovery pipe 115 is inserted into the jaw case 109, and an upper portion thereof is inserted into the chuck cylinder 101 while passing through the bottom plate of the core shaft recovery case 103.
The cylindrical body 110 fixed to the lower end of the nose piston 107 is slidably inserted into the rod cover 105 at the lower end of the chuck cylinder 101 and goes out of the chuck cylinder 101. A nose piece 116 is attached to the lower end of the cylindrical body 110. A front end (lower end) of the jaw case 109 is in contact with a lower wall (bottom portion) 117 of the cylindrical body 110 so as to be freely contactable and separable, and a front end of the pair of jaw cases 109 is chevron-shaped from the lower wall 117. It is contact | abutted so that contact / separation is possible at the nosepiece 116 which protruded in this.

  The chuck cylinder 101 is provided with a first port 118a communicating with the upper air chamber 108a, a second port 118b communicating with the intermediate air chamber 108b, and a third port 118c communicating with the lower air chamber 108c. The 1 port 118 a and the second port 118 b are provided on the upper surface of the chuck cylinder 101, and the third port 118 c is provided on the lower side surface of the chuck cylinder 101. The second port 118b is connected to the second port 118b at one end of an expandable / contractible spiral pipe 119 disposed in the upper air chamber 108a of the chuck cylinder 101 in a free state, and has a through hole 120 in the jaw case piston 106 at the other end. Are connected to the intermediate air chamber 108b. Since the helical pipe 119 can be expanded and contracted, it can contract when the jaw case piston 106 moves upward, expands when the jaw case piston 106 moves downward, and can follow the vertical movement of the jaw case piston 106.

  Therefore, according to the chuck cylinder 101, the pressurized air can be supplied from the first port 118a to the upper air chamber 108a, or the pressurized air in the upper air chamber 108a can be discharged to the atmosphere, and the intermediate air can be discharged from the second port 118b. The pressurized air can be supplied to the air chamber 108b, the pressurized air in the intermediate air chamber 108b can be discharged to the atmosphere, the pressurized air can be supplied from the third port 118c to the lower air chamber 108c, or the pressurized air in the lower air chamber 108c. Can be discharged into the atmosphere. Accordingly, the jaw case piston 106 and the nose piston 107 can be driven to move up and down. However, the first port 118 a and the second port 118 b are provided on the upper surface of the chuck cylinder 101, and the third port 118 c is provided on the chuck cylinder 101. Since it is provided on the lower side surface, the vertical movement range of the jaw case piston 106 and the nose piston 107 can be substantially the entire length of the chuck cylinder 101 excluding the core shaft collection case 103.

The vacuum ejector 104 is always operated during use of the continuous riveter, and the core shaft R1 of the rivet R cut at the time of caulking is sucked through the core shaft recovery pipe 115 and recovered into the core shaft recovery case 103, and The rivet R inserted between the nose piece 116 of the cylindrical body 110 of the nose piston 107 and the jaws 112 and 112 of the jaw case 109 is held by the suction force of the vacuum ejector 104.
With this configuration, the vacuum ejector 104 can always be operated when the continuous riveter is used. Therefore, the core shaft recovery pipe 115 and the nosepiece 116 and the jaws 112 and 112 at the tip of the cylindrical body 110 are provided. In this case, a suction force can always be applied via the core shaft recovery pipe 115. Therefore, the core shaft R1 of the rivet R cut at the time of caulking can be recovered to the core shaft recovery case 103 via the core shaft recovery pipe 115, and also the rivet R inserted into the nose piece 116 from the tip of the cylindrical body 110. It can also be held so as not to fall off by suction.

  The rivet supply unit F includes a tape air cylinder (not shown), a guide plate 122, and a storage case 121 for a rivet holder, and has the same configuration as the conventional rivet supply unit shown in FIG. However, the rod cover 105 at the lower end of the chuck cylinder 1 is provided with a fourth port 118d, and this fourth port 118d communicates with a tape air cylinder (not shown) of the rivet supply section F. The compressed air supplied to the lower air chamber 108c via the third port 118c is supplied to the tape air cylinder via the fourth port 118d after driving the nose piston 107, and is used for driving to supply the rivet R. It is like that.

Next, the operation of the continuous riveter according to the embodiment will be described.
The rivet holding band T is the same as that of the conventional example shown in FIG. 20, and the same reference numerals as those in FIG. In FIGS. 1 and 2 to 6, the pressurized air supply and exhaust paths are indicated by arrow lines.
Normally, the rivet R is stored in the storage case 121 of the continuous riveter in a state where the rivet holding band T is wound. When the rivet R is not caulked, the rivet R is lowered to the nose piece 116 by the suction force of the vacuum ejector 104 as shown in FIG. It is sucked so as not to fall off. In this state, pressure is supplied from the first port 118a to the upper air chamber 108a by the control of the valve portion G, and the second port 118b and the third port 118c are open to the atmosphere, so the jaw case piston 106 moves downward. Thus, the jaw case piston 106 and the nose piston 107 are moved to the bottom dead center of the chuck cylinder 101, and the jaw case 109 and the cylindrical body 110 are pushed out of the chuck cylinder 101 for a long time.

In this state, as shown in FIG. 2, when the rivet body R2 of the rivet R is inserted into the hole of the sheet metal 124 and the operation button 123 is pressed, the pressure air is supplied from the second port 118b as shown in FIG. Then, since the first port 118a and the third port 118c are opened to the atmosphere, the jaw case piston 106 is pushed up by the pressure supplied from the second port 118b to the intermediate air chamber 108b and moves up. As the jaw case piston 106 moves upward, the jaw case 109 rises.
At this time, as shown in FIG. 2, the pair of jaws 112, 112 are urged downward by the spring 113 via the jaw pusher 114 and stopped against the nose piece 116. When the jaws 112 and 112 are separated from the contact of the nose piece 116, they move downward while sliding the tapered surface 111 of the jaw case 109 by the urging force of the spring 113, and are moved closer to each other by the tapered surface 111. Ascending while holding the core axis R1 of R (see FIG. 3). The rise of the core shaft R1 causes the rivet R to be caulked, and then the head portion R3 of the rivet R is stopped at the tip of the nose piece 116, so that the core shaft R1 is cut (see FIG. 4). At this time, since the third port 118c is open to the atmosphere, the nose piston 107 is pressed downward, and only the jaw case piston 106 is raised.

Then, the core axis R <b> 1 that has been caulked is gripped by the pair of jaws 112 and 112 and rises together with the jaw case 109.
When the jaw case piston 106 moves to the top dead center, the pressure portion is subsequently supplied from the third port 118c to the lower air chamber 108c by the control of the valve portion G, and the first port 118a and the second port 118b are opened to the atmosphere. Therefore, as shown in FIGS. 4 to 5, the nose piston 107 moves up, and the cylinder 110 is also raised. Then, the head of the nosepiece 116 of the cylindrical body 110 comes into contact with the pair of jaws 112 and 112 and pushes up the pair of jaws 112 and 112 against the urging force of the spring 113, so that the pair of jaws 112 and 112 are separated from each other. Then, since the gripping of the cut core shaft R1 is released, the cut core shaft R1 is recovered in the core shaft recovery case 103 via the core shaft recovery pipe 115 by the suction force of the vacuum ejector 104, and the pair of jaws 112 , 112 are kept open.

  Further, the pressurized air supplied to the lower air chamber 108c to move the nose piston 107 upward moves upward as shown in FIG. 5 when the predetermined position of the cylindrical body 110 passes the rod cover 105 by the fourth port 118d. The rivet R supplied to the tape air cylinder (not shown) of the rivet supply unit F and held in the rivet holding band T is sent out to the mounting position of the nose piece 116. Therefore, as shown in FIG. 5, when the nose piston 107 is raised to the top dead center, the rivet R at the foremost position held by the rivet holding band T is moved to a predetermined position by the storage case 121 by a tape air cylinder (not shown). (The position where the core axis R1 of the rivet R is on the axis center below the nose piece 116) is sent and set.

  Next, when the operation button 123 is opened, pressure is supplied to the upper air chamber 108a from the first port 118a and the second port 118b and the third port 118c are opened to the atmosphere by the control of the valve portion G. The piston 106 is moved downward by the pressurized air supplied from the first port 118a to the upper air chamber 108a, so that the nose piston 107 is also moved down to the bottom dead center, so that the jaw case 109 and the cylindrical body 110 are also lowered. , Projecting out of the chuck cylinder 101. At this time, since the core shaft R1 of the rivet R is set so that the nose piece 116 and the shaft core R1 coincide with each other, the core shaft R1 of the rivet R is inserted into the jaws 112 and 112 which are inserted into the nose piece 116 and opened. The state is held and the state returns to the state shown in FIG. 1, and preparation for the next caulking is completed. By repeating the above operation, the rivet R can be continuously caulked.

When the jaw case 109 and the cylinder 110 are lowered, the tip of the nose piece 116 bends the upper and lower tabs T1 and T2 of the rivet holding band T downward as in the conventional example shown in FIGS. Descend.
The tape air cylinder (not shown) of the rivet supply unit F is the same as the conventional example shown in FIG. Accordingly, in the conventional example shown in FIG. 15 (the reference numeral of the tape air cylinder is the reference numeral of the conventional example), the supply of pressurized air to the tape air cylinder 37 is stopped when the nosepiece 116 is lowered, and the tape air Since the pressure of the cylinder 37 is released, the tape piston 39 is moved back to the original position by the action of the spring 38. However, the rivet holding band T is stopped by the check pawl 45, so that the rivet holding is stopped. While the belt T is stopped, the feed claw 41 moves away from the feed hole T4 and moves forward by one pitch, and engages with the feed hole T4 on the front side. At this time, the rivet holding band T is elastically pressed against the guide plate 43 by the guide (preventing deviation) spring plate 46, so that the rivet holding band T is reliably engaged with the feed claw 41 without being displaced.

  The above-described embodiment does not limit the present invention, and various modifications are allowed without departing from the spirit of the present invention.

It is sectional drawing which shows embodiment of this invention. It is an expanded sectional view showing jaw case of this invention, a cylinder, and the nose piece neighborhood. It is sectional drawing which shows the next operating state of FIG. It is sectional drawing which shows the next operating state of FIG. FIG. 5 is a cross-sectional view showing the next operating state of FIG. 4. It is sectional drawing which shows the next operating state of FIG. It is sectional drawing which shows the conventional continuous riveter. It is the circuit diagram of the valve | bulb which shows the conventional continuous riveter. It is sectional drawing which shows the conventional continuous riveter, and shows the next operating state of FIG. It is a circuit diagram of the valve | bulb which shows the time of the operation state shown in FIG. It is sectional drawing which shows the conventional continuous riveter, and shows the next operating state of FIG. It is sectional drawing which shows the conventional continuous riveter, and shows the next operating state of FIG. It is sectional drawing which shows the conventional continuous riveter, and shows the next operating state of FIG. It is a circuit diagram of the valve | bulb of the state of FIGS. 11-13. It is sectional drawing of a rivet supply part. It is front explanatory drawing of the partial cross section which shows the positional relationship with a blind rivet and a blind rivet holding zone when a nosepiece descends. It is front explanatory drawing of the partial cross section which shows the next operating state of FIG. It is front explanatory drawing of the partial cross section which shows the next operating state of FIG. It is front explanatory drawing of the partial cross section which shows the next operating state of FIG. It is a perspective view which shows an example of a blind rivet holding belt.

Explanation of symbols

D body F rivet supply part G valve part 101 chuck cylinder 102 handle 103 core shaft collection case 104 vacuum ejector 105 rod cover 106 jaw case piston 107 nose piston 108a upper air chamber 108b intermediate air chamber 108c lower air chamber 109 jaw case 110 cylindrical body 111 Tapered surface 112 Jaw 113 Spring 114 Jaw pusher 115 Core shaft collection pipe 116 Nose piece 117 Lower wall (bottom) of cylindrical body
118a 1st port 118b 2nd port 118c 3rd port 118d 4th port 119 Spiral pipe 120 Through-hole 121 Storage case 122 Guide plate 123 Operation button 124 Sheet metal

Claims (2)

A jaw case piston is slidably inserted into the chuck cylinder, and a nose piston is slidably inserted below the chuck cylinder. The jaw case piston and the nose piston are arranged such that the upper part of the jaw case piston is in the upper air chamber, the jaw case piston and the nose. The intermediate air chamber is defined between the piston and the lower part of the nose piston is defined in the lower air chamber.
A cylindrical body extending outside the chuck cylinder is fixed to the lower part of the nose piston, and can be moved up and down by the nose piston. A cylindrical jaw case that moves up and down in the cylindrical body is fixed to the jaw case piston. It can be moved up and down by the jaw case piston,
The chuck cylinder is provided with a first port that communicates with the upper air chamber, a second port that communicates with the intermediate air chamber, and a third port that communicates with the lower air chamber, and the second port is an upper air chamber of the chuck cylinder. One end of an expandable and contractible spiral pipe disposed in a free state is connected to the second port, the other end is connected through the jaw case piston and communicated with the intermediate air chamber,
The jaw case is formed with a hole at the tip, and a tapered surface is formed on the inner surface of the tip so as to reduce the diameter toward the tip with the hole as a center. A pair of jaws that are urged downward through the sleeve are slidably inserted, and grip the core shaft of the blind rivet inserted into the hole at the lower end of the cylindrical body directly from the outside or through the nosepiece. Open,
A core shaft recovery pipe is connected to the upper end of the jaw case, and communicates with the core shaft storage case or the outside of the cylinder. A vacuum ejector is connected to the core shaft recovery pipe, and the core shaft of the blind rivet is cut during caulking. Is sucked and discharged through the core collecting pipe, and is always operated during use to hold the blind rivet inserted into the jaw portion of the jaw case from the tip of the cylinder of the nose piston with the suction force of the vacuum ejector. A continuous rivetta characterized by that. The continuous riveter is configured to guide a storage case stored in a state in which a belt-like blind rivet holding band with a blind rivet is wound and the blind rivet holding band along a guide plate, and to the blind rivet holding band. A rivet supply unit having a tape air cylinder for supplying one installed blind rivet to one;
The continuous riveter according to claim 1, wherein a fourth port communicating with the tape air cylinder is provided at a lower portion of the chuck cylinder.

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