JP3491134B2 - Continuous rivetta - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous riveter capable of continuously driving a blind rivet (hereinafter, referred to as a rivet) for caulking a sheet metal or the like. 2. Description of the Related Art A conventional continuous riveter is disclosed in Japanese Patent Application Laid-Open No. Hei 7-236936 as the title of the invention, "Riveter".
There are those shown in FIGS. 4 to 9 and those shown in FIG. 10 filed earlier. The continuous riveter shown in FIGS. 4 to 9 includes a chuck cylinder 10, a nose piston 30 which is vertically movably inserted into the chuck cylinder 10 and has a cylindrical body 31 extending downward, and the cylindrical body 31. A jaw case piston 20 to which a jaw case 22 moving up and down is fixed, and a jaw case 2
A jaw 24 for engaging and disengaging the taper surface 23 at the inner and lower ends of the rivet R to grip and release the center axis R1 of the rivet R;
6 and the rivet R provided at the lower end of the cylindrical body 31.
A nosepiece 32 into which the center axis R1 is inserted, a storage case 40 in which a band-shaped blind rivet holder T on which a rivet R is mounted are stored in a wound state, and the blind rivet holder T are guided by a guide plate 43. And a rivet supply section C having a tape air cylinder 42 for guiding the rivet R mounted on the blind rivet holder T one by one. A mandrel housing case 14 is fixed inside the jaw case piston 20, and the broken mandrel R1 is
At 1, the mandrel is sucked up into the mandrel housing case 14. FIG. 4 shows that the center axis R1 of the rivet R is
FIGS. 5 and 10 show a state in which the rivet R is inserted through the nosepiece 32 and is gripped by the jaws 24.
Is held by the jaw 24, and the head R2 of the rivet R is inserted into the hole of the sheet metal H. From this, the jaw case piston 20 is pulled up, and caulking is started. Next, as shown in FIG. 6, when the jaw case piston 20 is pulled up, the jaw case 22 is raised, and the shaft R1 gripped by the jaw 24 is pulled up. The lower end of R1 is the head R
It is cut and separated from 2. [0005] Next, as shown in FIG.
When 0 is pulled up, the cylindrical body 31 also rises together with the nosepiece 32, so that the shaft R1 moves away from the sheet metal H. As shown in FIG. 7, the mandrel R1 is sucked into the mandrel housing case 14 by the vacuum ejector 11, and the jaw case piston 20 and the nose piston 3 are sucked up.
Since “0” increases to the top dead center, the nosepiece 32 ascends above the center axis R1. At this time, one tape is fed by the feed claw 46a of the tape air cylinder 42 shown in FIG. Next, after caulking, the nose piston 3
0 and the jaw case piston 20 are lowered, and at this time, the center axis R1 of the rivet R becomes the cylindrical body 3 of the nose piston 30.
1 and is loosely fitted in the opened jaw 24 and the nose piston 3
Since the leading end of the cylindrical body 31 of 0 is bent downwardly by bending the upper and lower tabs of the blind rivet holder T downward, the initial state of FIG. 4 is restored, and preparation for the next R caulking is completed. By repeating the operation, the rivet R can be caulked continuously. [0007] The continuous riveter of FIG.
2 is a separated structure, the swaging structure is the same as that of FIGS. 4 to 8, and the swaging structure of the present invention is also the same as that of FIGS. FIG. 9 is an explanatory diagram of the case of FIG. 8 as viewed from the side. In the above case, the interval between the rivets R mounted on the rivet holder T must be set so as not to hinder the lowering of the cylindrical body 31 of the nose piston 30. FIG. 11 to FIG. 13 show a case where the applicant has previously registered Utility Model Registration No. 3028739 as the name of the invention, "Blind rivet holder", and easily lifts the rear part of the riveter upward. In order to be able to rivet and increase the number of rivets R held on the plastic elongated body T1, the rivet R is tilted, not perpendicular to the longitudinal direction of the plastic elongated body T1, so that the rivet R is moved upward and downward. The tabs T4 and T5 of FIG. 4 are used. The continuous riveter shown in FIGS. 4 to 9 and FIG. 10 may have a structure in which the blind rivet holder T can be used, as shown in FIGS. A rivet interval that does not hinder the lowering of the cylindrical body 31 of the nose piston 30 is required. As described above, in the conventional continuous riveter, the interval between the rivets R in the blind rivet holder T must be a riveter interval that does not hinder the lowering of the cylindrical body 31 of the nose piston 30. Therefore, the number of rivets R that can be stored in the storage case cannot be so large. The present invention has been made in view of the above circumstances, and since the rivet interval of the blind rivet holder T can be reduced, a continuous riveter capable of accommodating a large number of rivets R even in a small storage case 40 is not provided. It is to be. According to the present invention, there is provided a continuous riveter comprising: a chuck cylinder; a nose piston which is inserted into the chuck cylinder so as to be vertically movable and has a cylindrical body extending downward; A jaw case piston to which a jaw case for vertically moving the jaw case is fixed, a jaw inserted into the lower end of the jaw case, engaging and disengaging from a tapered surface at the inner lower end of the jaw case, and holding and releasing the center axis of the blind rivet; A jaw pusher resiliently urged and in contact with the jaw, a nose piston disposed at a lower end of the cylindrical body, into which a blind rivet shaft is inserted, and a belt-like shape on which a blind rivet is mounted. A storage case in which the blind rivet holder is stored in a wound state and the blind rivet holder are guided along a guide plate. A rivet supply unit having a tape air cylinder for supplying one blind rivet mounted on the blind rivet holder to a rivet supply unit, wherein the guide plate extending from the storage case of the rivet supply unit is: The blind rivet holder has a bent portion in which the direction of the vertical portion of the blind rivet holder is bent at a predetermined angle through a linear feed portion of a predetermined length, and the blind rivet holder has a straight line of the guide plate. It is located on the axis of the center axis of the blind rivet in the upper tab immediately after being bent at the bent part through the feed part, and is arranged so that the axis of the cylinder coincides with that axis. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a bottom view of the continuous rivet of the present invention, FIG. 2 is a view taken along the line AA of FIG. 1, and FIG. 3 is a side view of the continuous rivet, as shown in FIG. The guide plate 43 passes through the linear feed portion 43a, and the vertical portion T2 of the blind rivet holder T (FIG. 2).
A bent portion 43b is formed to bend at a predetermined angle β such that the direction is bent at a predetermined angle. The cylindrical body 3 of the nose piston 30
1 indicates that the blind rivet holder T is mounted on the guide plate 4
3 is located on the axis of the center axis R1 of the blind rivet R in the upper tab T4 immediately after being bent at the bent section 43b through the straight feed section 43a, and is disposed so that the axes of the cylinders are aligned. . As shown in FIG. 3, in this embodiment,
The blind rivet through holes of the upper and lower tabs T4 and T5 of the blind rivet holder T
, But not at right angles to the longitudinal direction. However, without tilting the angle α, FIGS.
As shown in FIG. With the structure according to the present invention, as shown in FIG. 1, the upper and lower tabs T4 and T5 immediately after the blind rivet holder T is bent at the bent portion 43b through the straight feed portion 43a, and Since the gap L is formed between the upper tabs T4 and T5 of the linear feed portion 43a, the descending cylindrical body 31 does not come in contact with the straight feed section 43a. Therefore, as shown in FIG. It is possible to do. The upper and lower tabs T4, T4 of the bent portion 43b
No. 5 does not hinder the lowering of the cylindrical body 31 because the rivet R is already used and does not exist. According to the present invention described in detail above, the following effects can be obtained. (1) According to the continuous rivet of the present invention, the interval (pitch) of the rivets in the blind rivet holder can be reduced, so that the number of rivets that can be stored in the storage case becomes larger than before, and therefore, the blind rivet at the work site. The frequency of replenishment of the holder is reduced, and the efficiency is improved. (2) In addition, since the length of the plastic elongated body required for mounting the same number of pieces can be shortened, the cost is reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a bottom view showing an embodiment of the present invention. FIG. 2 is a view taken along the line AA of FIG. 1; FIG. 3 is a side view showing an embodiment of the present invention. FIG. 4 is a sectional view of a conventional continuous riveter. FIG. 5 is a sectional view of a conventional continuous riveter. FIG. 6 is a sectional view of a conventional continuous riveter. FIG. 7 is a sectional view of a conventional continuous riveter. FIG. 8 is a cross-sectional view of a supply section of a conventional continuous riveter. FIG. 9 is a longitudinal sectional view of a supply unit of a conventional continuous riveter. FIG. 10 is a cross-sectional view of another conventional continuous riveter. FIG. 11 is a side view of a conventional blind rivet holder. FIG. 12 is a plan view of a conventional blind rivet holder. FIG. 13 is a sectional view of a rivet insertion portion of a conventional blind rivet holder. [Description of Signs] 10 Chuck cylinder 22 Jaw case 24 Jaw 26 Jaw pusher 30 Nose piston 31 Cylindrical body 32 Nose piece 40 Storage case 42 Tape air cylinder 43 Guide plate 43a Straight feed portion 43b Bent portion R Blind rivet (rivet) T blind Rivet holder T2 Vertical part T4 Upper tab T5 Lower tab

Claims (1)

(57) [Claim 1] A chuck cylinder, a nose piston which is vertically movably inserted into the chuck cylinder and has a cylindrical body extending downward, and a jaw which moves vertically in the cylindrical body A jaw case piston having a case fixed thereto and a jaw inserted into a lower end of the jaw case and engaged with a tapered surface at an inner lower end of the jaw case to grip and release the center axis of the blind rivet; A biased jaw pusher, a nose piston disposed at a lower end of the cylindrical body, into which a blind rivet shaft is inserted, and a belt-shaped blind rivet holder on which a blind rivet is mounted. The storage case and the blind rivet holder that are stored in a rotated state are guided along a guide plate, and the blind rivet holder is A rivet supply unit having a tape air cylinder for supplying one blind rivet attached to the rivet supply unit, wherein the guide plate extending from the storage case of the rivet supply unit has a straight line having a predetermined length. Via a feed portion, the vertical portion of the blind rivet holder has a bent portion where the direction of the vertical portion is bent at a predetermined angle, and the cylinder of the nose piston is bent when the blind rivet holder passes through the linear feed portion of the guide plate. A continuous riveter, which is located on the axis of the center axis of the blind rivet in the upper tab immediately after being bent at the portion, and is disposed so that the axis of the cylindrical body coincides with the axis.