JPS605959Y2 - hand riveter - Google Patents

Description

[Detailed description of the invention] This invention relates to the improvement of a hand riveter. More specifically, by keeping the opening of the gripping rod of the hand riveter narrow in advance, it is possible to improve Even if the plate thickness of the joining member to be riveted is large and the amount of pushing of the gripping rod required for riveting is small, the pressing operation of the gripping rod can be performed easily and sufficiently, and it is strong. This hand riveter is constructed so that riveting work can be accomplished smoothly, and the retraction distance of the jaw case can be adjusted as appropriate, so that the opening degree of the gripping rod can be adjusted to the optimum state.
It is related to.

In a conventional hand riveter of this kind, for example, as shown in No. 4, the jaw case B housed in the head frame A is housed deeply with the front end surface of the jaw case B normally in contact with the inner wall of the tip end of the head frame A. Therefore, the upper grasping rod C whose tip is attached to the jaw case is the first
As shown by the chain line in the figure, the gripping rod is naturally positioned at the upper part and the opening of the gripping rod is always kept wide.

However, in this case, if the sleeve of the rivet is long or the plate thickness of the joining member to be riveted is thin and the required pushing amount of the gripping rod is large, there will be no problem, but conversely, if the sleeve is short or Alternatively, if the plate thickness of the joining member is thick and the required pushing amount of the gripping rod is small, it is difficult to apply a sufficient pushing force due to the wide opening of the gripping rod, making it difficult to perform the pressing operation smoothly. There are drawbacks that significantly hinder work.

This invention was completed with the aim of dealing with the above problem, and a protrusion is provided on the periphery of the inner end of the nosepiece to make it contact with the front end surface of the jaw case. The jaw case in the head frame is normally pushed back by a required distance, the tip is engaged with the jaw case, and one gripping rod whose rod portion is pivotally connected to the body of the hand riveter is placed at a low position. , maintain a narrow opening with the other gripping rod formed on the main body of the hand riveter, and screw a lock nut into the threaded rod portion of the nosepiece between the enlarged head of the nosepiece and the tip surface of the head frame. This invention relates to a hand riveter characterized in that the nose piece can be fixed at a desired position by the lock nut, and the retraction distance of the jaw case can be adjusted as appropriate.

The details of this invention will be explained below based on the embodiment drawings. In FIGS. 1 and 2, 1 is a hand riveter main body equipped with a lower gripping rod 2, and a head frame 3 is provided at the tip thereof. The jaw 4, jaw pusher 5, and spring 6 are sequentially inserted into the head frame to open the through hole 7.
The jaw case 9 is housed in a jaw case 9 which is enclosed in a barrel 8 with a forked portion 11 at the tip thereof fitted into a groove 10 provided on the outer periphery of both sides of the upper middle portion of the jaw case 9. The head frame 3 is configured to be moved forward and backward within the head frame 3 by the vertical movement of an upper gripping rod 12 which is pivotally connected to the main body 1.

Reference numeral 13 denotes a nose piece screwed onto the tip of the head frame 3, and the leg length of the threaded portion is made longer than that of conventional products, and the periphery of the inner end is brought into contact with the front end surface of the jaw case 9. A ring-shaped protrusion 14 is provided to protrude toward the inner end, and this protrusion 14 presses and retreats the jaw case 9 in the head frame 3 by a predetermined distance in a normal state. The rod 12 is placed at a low position and the opening degree O between the upper and lower gripping rods 12.2 is kept narrow within a required range.

Reference numeral 15 denotes two lock nuts screwed into the threaded part of the nose piece between the enlarged head 16 of the nose piece 13 and the distal end surface of the head frame 3. By using these lock nuts 15, the nose piece 13 can be screwed and fixed at a desired position, and therefore the opening degree of the gripping rod can be adjusted to the optimum state by changing the retraction distance of the jaw case 9 as needed. , 16' is the pivot point of the upper gripping rod 12, 1
7 indicates a return spring of the bent rod 12.

As described above, this invention uses a nose piece with a special structure to keep the opening of the gripping rod of the hand riveter narrower than before, and uses a lock nut to hold the nose piece at the desired position. By having a fixable structure, the retraction distance of the jaw case can be adjusted appropriately, making it extremely easy to grasp the gripping rod during riveting work, and the strong gripping force ensures that the riveting work can be done far away. Therefore, for example, in Fig. 3, if the sleeve 7 of the rivet toy is short or the thickness of the joining member to be riveted is large, the gripping rod of the riveter may be difficult to use when driving the rivet. Even when the required pushing amount is small, the gripping rod can be pushed in easily and sufficiently, and strong rivets can be driven smoothly and reliably, and the opening degree of the gripping rod can be appropriately adjusted to the optimum condition. The present invention has the feature that the above effects can be further improved.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; Fig. 1 is a partially cutaway front view, Fig. 2 is an enlarged cross-sectional view taken along line A-A in Fig. 1, and Fig. 3 is a rivet on the joining member. FIG. 4 is an enlarged sectional view of the head frame portion of a conventional hand riveter. 1...Hand riveter body, 2...
Grasping rod, 3...Head frame, 9...
・Jaw case, 12... Grasping rod, 13...
...Nose piece, 14...Protrusion, 15...
...Rocknut, 16... Enlarged head, 1
6'... Pivot joint, 0... Opening degree.

Claims (1)

[Scope of utility model registration request] A protrusion is provided on the periphery of the inner end of the nosepiece for abutting against the front end surface of the jaw case, and the protrusion normally presses and retreats the jaw case in the head frame by a predetermined distance. One of the gripping rods, whose tip is engaged with the case and whose rod portion is pivotally connected to the hand riveter body, is placed at a low position, and the opening angle with the other gripper rod formed on the hand riveter body is kept narrow. , and a lock nut is screwed into the threaded part of the nose piece between the enlarged head of the nose piece and the distal end surface of the head frame, and the nose piece is configured to be fixed at a desired position by the lock nut, and the jaw case is fixed. A hand riveter 0 characterized in that the retreating distance can be adjusted as appropriate.