JPH0327708Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a riveting machine, in which the rear part of a mandrel into which a plurality of tubular rivets are inserted in series from the rear part is connected to a tubular front rivet machine attached to the tip of an air or hydraulic gun barrel. In a riveting machine that prepares to continuously drive rivets by air or hydraulics by inserting a tubular member with a two-split groove into the rivet, the mandrel is inserted into the rivet by gently expanding the member with a tool without prying it open using the rear part of the mandrel. It has a structure that allows the rear part and rivet to be inserted into the barrel.

(Prior art) As shown in FIG.
are inserted in series, and the tubular front jaw f, which is attached to the tip of the air or hydraulic gun barrel e as shown in FIG. Rear part c of mandrel a
There is a known riveting machine in which the mandrel a is inserted by prying it open, the mandrel a is passed through a curver inside the barrel e, and the rear part c is inserted and fixed into a collet action tail jaw provided on the rod of the cylinder (Japanese Patent Application Laid-Open No. 116782-1982). In this rivet machine, a rivet d and a diameter-expanding head b of a mandrel a are placed on the front of a member g of a front jaw f, and a cylinder installed inside a barrel e connects the tail jaw. Connect the mandrel a to the tubular rivet d
A length approximately corresponding to the length is hammered out, and the enlarged diameter head b and one rivet d are driven into the through hole provided in the plate member to be joined by the rivet, and then the mandrel a is pulled with a cylinder. Expanded diameter head b
This allows the tubular rivet d to be brought into close contact with the wall of the through-hole for riveting. At that time, the curler elastically contracts the spring and retreats together with the mandrel a, but when the mandrel a is no longer pulled, the curler alone moves forward due to the action of the spring, pushing the rivets d in the forward direction and moving one of them in front of the member g. The rivets are continuously driven in by extruding the rivets. However, when the mandrel a is replaced after the rivet d is used up, the above-mentioned prying operation must be performed each time, which is extremely troublesome.

(Problems to be Solved by the Invention and Purpose of the Invention) In view of the above, the present invention aims to solve the above-mentioned disadvantages by creating a structure that allows the above-mentioned prying to be performed with a light and small force of a tool, and has devised the invention. This is the purpose of

(Means for Solving the Problems) The present invention has been made to meet the above-mentioned object, and a plurality of tubular rivets d are inserted in series from the rear of a mandrel a equipped with a diameter expanding head b, and air or Insert the rear part of the mandrel a into a tubular member provided with a split groove h that can be divided into two parts of the tubular front jaw f attached to the tip of the hydraulic barrel e, pass it through the curver inside the barrel e, and insert the front part of the rod in the cylinder. one rivet d that inserts and fixes the rear part of the rod into the tail jaw and is held by a mandrel a on the outside of the tubular member g of the front jaw f;
In this rivet machine, which drives the next rivet d to the outside of the front end of the front jaw f with driving by air or hydraulic pressure, an engaging recess 12 is provided on the outside of the tubular member 5 of the front jaw 3, f, the groove 6 of g, and h. This invention relates to a riveting machine characterized in that a tool is inserted into each engaging recess 12 and rotated within 90 degrees to open the split groove 6, and the riveting machine simplifies preparation for driving a rivet using the rivet machine. It is something that can be done.
(The alphabetical code in parentheses is the 7th
- These are the symbols attached to Figure 9. ) (Example) A preferred example of the present invention will be described below.

FIG. 1 shows an air or hydraulic gun 1, and a tubular front jaw 3 is attached to the tip of a gun barrel 2. The front jaw 3 has the structure shown in FIG. 2. A tubular member 5 with a two-split groove 6 is inserted into the front jacket body 4, and the flange at the rear end of the member 5 is inserted as shown in FIG. 7 and the inside of the front end of the front body 4, the annular engagement protrusion 8 having a chevron-shaped cross section of the member 5 is brought into elastic contact with the front surface of the front body 4. The member 5 has a tubular shape, and has a through hole 1 through which the mandrel a passes through the center of the tip.
1 is provided.

The present invention is based on the above-described known structure, and as shown in FIG. 2, engaging recesses 12 are provided which are long in the direction of the gun barrel along the split grooves 6 on both the left and right sides of the member 5. (FIGS. 2 to 5) It is preferable that the engaging recesses 12 be provided at the upper and lower portions of the split groove 6, but they may also be provided only at the upper or lower portions.

Figures 1, 3 to 6 show an example of a device for forcibly opening the split groove 6. Before attaching the front jaw 3 to the gun barrel 2, an opening bracket 13 made almost perpendicular to the gun barrel 2 is fitted onto the gun barrel and fixed. administer. The bracket 13 pivotally supports a small cylinder 14 at its upper end, and is provided with support pieces 19 along both outside sides of the barrel 2 and front jaw 3, and is pivotally supported on a rod 15 of the cylinder 14 by the support pieces 19, 19. A link 16 to which a pair of long tools 17, 17 fitted in the engagement recess 12 in the direction of the gun barrel is fixed is attached to the rod 15.
It is supported by a shaft 18 provided in the.

In this embodiment, the rod 15 is moved backward by the cylinder 14 as shown in FIG.
By making the member 7 parallel to the engagement recess 12, the member 5
The split groove 6 is closed. Furthermore, when inserting the rear part c of the mandrel a into which a plurality of tubular rivets d are fitted in series into the front jaw 3, move the rod 15 forward as shown in FIG. Rotate with. At this time, the slot 6 of the member 5 is forcibly opened, so that the insertion of the rear part c of the mandrel a into the member 5 and the front body 4 and the passage of the tubular rivet d are facilitated.

When the cylinder 14 is not used as an opening device,
The tool 17 fitted in the engagement recess 12 is attached by the support piece 19 attached to the opening tool bracket 13 shown in FIG. The handle 21 provided on the shaft is used to open and close in the same manner as described above.
(Figure 6).

In addition, the structure of the device for opening and closing the slot 6 using the tool 17 can be freely selected.

(Operations and Effects) As described above, the present invention eliminates the drawback of the conventional method in which the slot 6 of the tubular member 5 provided in the front body 4 of the front jaw 3 is pried open by the rear part c of the mandrel a. Split groove 6
An engagement recess 12 is provided along the
Since the tool opens and closes the split groove 6 by inserting a suitable tool and rotating within 90 degrees, it is necessary to replenish the rivet d every time the tubular rivet d is depleted and to insert the rear part c of the mandrel a into the front jaw 3. This has the effect of allowing easy insertion.

[Brief explanation of drawings]

Figures 1 to 7 show an embodiment of the present invention, Figure 1 is a partially cutaway side view, Figure 2 is an enlarged side view of the front jaw 3 and tubular member 5, and Figures 3 and 4 explain the operation. FIG. 5 is a partially cutaway side view, FIG. 5 is a cutaway end view taken along the line A--A in FIG. 1, and FIG. 6 is a cutaway end view of another embodiment of the apparatus. Figures 7 to 9 show a conventional device. Figure 7 is a side view of the mandrel a and the tubular rivet d, Figure 8 is an enlarged partially cutaway side view of the front jaw f, and Figure 9 is the front jaw of the mandrel a. FIG. 7 is an explanatory diagram showing the insertion of a break into f. a → mandrel, d → tubular rivet, 2 → gun barrel, 3 → front jaw, 4 → front jaw body, 5 → member, 6 → split groove, 12 → engaging recess, 1
7 → Tools.

Claims (1)

[Scope of Claim for Utility Model Registration] A plurality of tubular rivets are inserted in series from the rear of a mandrel equipped with a diameter expansion head, and a split groove is provided that allows the tubular front jaw attached to the tip of an air or hydraulic gun barrel to be split into two. The rear part of the mandrel is inserted into a tubular member, which is passed through the curver inside the barrel, and the rear part is inserted and fixed into the tail jaw at the front part of the rod of the cylinder, and the mandrel is held by the mandrel outside the member of the front jaw. In a riveting machine that drives a rivet using air or hydraulic pressure and sends the next rivet to the outside of the front end of the front jaw, an engaging recess 12 is provided outside the split groove 6 of the tubular member 5 of the front jaw 3, and each engagement Recess 1
A riveting machine characterized in that a tool is inserted into 2 and rotated within 90 degrees to open a split groove 6.