ES2208002A1 - Self-adjusting crimper - Google Patents

Abstract

Self-adjusting crimper of the type that consists of a male arm and a female arm with serrated mouths and moveable upon themselves by means of a toe element, which sets and slides them in a longitudinal and serrated window, carried out in one the serrated mouths, both arms are connected by a connecting rod consisting of two sockets (1) (2) which move among themselves by telescopic means, one (2) of them pivoting on the male arm (6) and the other on a female arm (11): a first setting spring (3) to both sockets (1), (2) and a second spring (5) which links one (1) of the sockets with one (11) of the arms.It is applicable to the production of hand tools.

Description

Improvements in the object of main patent no. 9901078 by self-adjusting tongs.

Self-adjusting tongs are known as the described in US-6101908 of the applicant.

In the manual tongs the user must manually position the mouths looking for the best position of squeeze in.

In the self-adjusting tongs the user trust that the tenacilla herself looks for the best position of tighten, so it is a serious inconvenience for the user Check that your pincer does not grip the work piece properly, For example, a tube, that the position chosen by the pincer is not the appropriate and that it must be the user himself who searches for score.

The applicant has detected the problem and its diagnosis is that it resides in the crimp nail, which is positioned in the crimp not properly. The applicant has found out that it is very excessive the longitudinal travel of the nail from the moment in which the tong's mouths touch the workpiece until that the crimping of the teeth and the mooring or clamping is carried out definitive part of the piece, which causes the aforementioned difficulties of tie-grip-hold of the piece.

The applicant has solved the problem through of an additional spring helping the nail rotate quickly from the mentioned moment of contact of the mouths with the piece, and in consequence decreasing the longitudinal travel.

To better understand the purpose of this invention, a preferred form of practical realization, susceptible to accessory changes that do not distort its foundation.

Figure 1 is a partial sectional view of a practical realization of a known tong with a nail (14) known.

Figure 2 is a view of the resting position prior to manual tightening on the arms male-female (6), (11) of the pincer, both of the nail of figure 1 as of the nail of the invention.

Figure 3 is a view of the known nail of Figures 1 and 2 in crimping position with the mouths (10), (13) squeezing the piece (20).

Figure 4 is a view of the nail object of the invention in crimp position.

An example of practical, non-limiting embodiment of the present invention.

The tenacilla consists, in a known way, of a male arm (6) with a head (7) with a toothed mouth (10) upper in which a window (8) with teeth (9) has been practiced and a female arm (11) with a large opening (12), which allows the passage of the head (7) of the male arm (6), and carrier of the mouth serrated (13) lower and of a toothed nail element (14) that pivots and crimp with the teeth (9) of the window (8).

It is arranged that the male arm (6) and the arm female (11) are joined by a connecting rod (15) that pivots by its ends on male and female arms (6), (11) and with a spring interior (3).

In figure 1 a spring (5) of opening attached to the outer bushing (1) of the connecting rod (15) and to the female arm (11) pivotally (C), preferably its pivot shaft (C) between the pivot pin (A) of the outer bushing (1) and pivot shaft (21) of the nail (14).

The spring (5) tends to keep the male-female arms (6), (11).

The nail (14) has front teeth (17) to be crimped with the teeth (9) of the head (7) of the male arm (6).

The spring (5) tends to bring the back surface (30) of the nail (14) with the surface (31) of the window (8) facing the teeth (9) (figures 2 and 3).

The mouths (10), (13) of the tongs must grab the work piece (20), for which the user only you have to tighten the male and female arms (6), (11). In the moment that the mouths (10), (13) make contact with the piece of work is available from the position of figure 2.

Since it is a type of tongs self-adjusting, the user does not take into account the position of the nail (14) and should only continue to tighten, in confidence that the tenacilla's self-adjusting will exercise her function.

In practice, and this is the problem to solve, this trust is disappointed and the mouths (10), (13) do not grab the work piece (10). Why?.

The mouths (10) (13) are already in contact with the piece (20), should not be separated and in that position and moment should Start tightening.

If Figure 2 is observed (starting position of tightening) the upper tooth should be expected (17-1) of the nail (14) will crimp directly with the tooth (9-1) facing the head (7).

Studied the phenomenon, the applicant has figured out that doesn't happen.

In practice (figure 3) the upper tooth (17-1) of the nail crimp with the tooth (9-2), that is, with the one immediately following the tooth (9-1) that would correspond so that everything It will work well.

The center (0_ {1}) of rotation of the shaft (21) of the nail (14) has moved to (0_ {2}) (figure 3) with a kinematic trajectory with a strong downward linear component 0_1, 0'1 and a small turn 0'1 0_2 (β).

The linear component 0_1 0'1 is the guilty of the teeth (17) of the nail (14) crimping with the teeth (9) immediately following their corresponding faced.

The cause is that while the user tighten the arms (6) (11) the springs (3), (5) of the self-adjusting tend to contact the surface back (30) of the nail (14) with the surface (31) of the window (8) facing the teeth (9) (figures 2, 3), but as soon as produces the contact of the mouths (10), (13) with the workpiece (20), the action of the springs (3), (5) is compensated by the user effort, and the female arm assembly (11) tends to rotate-move relative to the male arm (6), and with it the nail (14) until the teeth (17) of the nail (14) they hook with the teeth (9) of the head (7) of the male arm (6).

Analyzed the problem, it is appreciated that the small turn (?) 0 '1 0 2 is always necessary to get the crimping between teeth (17) (9) and what is excessive is the linear component 0 1 0 '1. Both movements occur simultaneously until crimping in a time (t_ {1}).

The applicant has solved the problem by doing the crimp is reduced by a time (t2) much less than the time (t1) of the prior art. To do this it gives the nail a spring additional (m) spring antagonist (5) that joins the female arm (11) and the connecting rod (15) (figure 4).

The action of this additional spring (m) is continues, but it is not appreciated until the mouths (10), (13) make contact with the part (20) and the user's hand has defeated the spring action (5) that tends to place the nail (14) in resting position - do not crimp. Arrived at that moment, the additional spring (m) tends to rotate the nail (14) over its center of rotation (0_ {1}), which adds to the action conventional of the user who squeezes the arms (6), (11), so that the following cause-effect chain originates: the small turn (?) 0 '' 1 0 3 is achieved very quickly, consequently the linear component 0_1 0 '' 1 it is very small, consequently a quick crimp is made, in consequence the teeth (17-1), (17-2), (17-3) of the nail (14) they engage with their corresponding teeth facing each other (9_ {1} -1), (9-2), (9-3) of the head (7).

The spring (m) is compressed preferably in a perforation of the nail (14) practiced in its back, in an area as far away as possible from the center of turn (0_ {1}) and action against the surface (31) of the window, facing the teeth (9).

Claims (1)

1. Improvements in the object of the main Patent No. 9901078 by self-adjusting tongs, which consist of a male arm (6) and a female arm (11) with serrated mouths (10), (13) and slideable together by means of a nail element (14) that crimps them and slides in a longitudinal and serrated window (8) practiced in one of the serrated mouths, both arms (6) being joined, (11) by a connecting rod (15) , and an opening spring (5) connecting the connecting rod (15) with one of the arms (11), characterized in that it consists of an additional spring (m) antagonist of the opening spring (5), arranged in the nail element ( 14) and includes the surface (31) of the window (8) facing the teeth (9) of said window (8).