FR2488040A1 - DEVICE FOR FASTENING ACCESSORIES ON THE FRONT PANEL OF A MONOBLOC CONTACTOR - Google Patents

Abstract

1. Device of the type with tenon and slide and locking hook for the simultaneous fixing of the fixed and mobile parts of an accessory occupying a reduced space as regards width, in particular an auxiliary mono-modular contact on the parts, respectively fixed and mobile, of a mono-block contactor, able to receive a plurality of individually detachable accessories, characterized in that it comprises : - a single tenon (2) in the form of a T arranged on the face (1) of the contactor at the site of fixing the accessory (5), cooperating during the course of a movement of the accessory in its mean plane, with a single slide (8) situated at the base of the face (7) of the accessory directed towards the contactor ; - a hook (6) arranged on the upper part of the face (7) of the accessory directed towards the contactor and cooperating during the same movement with an edge (15) of a cavity (13) situated on the contactor ; - a locking catch (17) situated on the accessory, able to penetrate into a rectangular hole (18) of the face (1) of the contactor under the action of an elastic part (19), provided with an arm (20) and able to be freed from the said hole (18) by a manual traction on the arm (20) against the action of the elastic part (19) ; - and a tenon (4) in the form of a T, situated on the movable runner (3) of the contactor and cooperating, during the same movement of the accessory in its mean plane, with a slide (9a) situated on the movable runner (9) bearing the contacts of the accessory.

Description

The invention relates to a device for fixing access

  including auxiliary contacts, on the front of a contact

monobloc.

  Generally, on a monobloc contactor of small cali-

  (four integrated main contacts) the accessories are mounted in elements from one to four modules (one element of four corresponding modules

  to the entire attachment surface).

  Accessory fasteners consisting of 1, 2 or 4 modules are made in a known manner, either directly by snap-fastening

  front or by sliding pins and slides of the parallel element

  same to the mounting surface up to the stop.

  Front snap fasteners are particularly

  used for single module elements and have two brackets

  snapping into the mounting surface (Patent No. 498,480 of

  manderesse). This method of attachment, however, requires a sup-

  to connect the sliding contact holders of the accessory

and the contactor.

  Fixing with tenon and slide is particularly used for accessories with 2 or 4 modules, but becomes very delicate

  for fixing a single module. Indeed, this system comprises two sets of

  superimposed with tenon and slide.

  Such a tenon and slide system Top and tenon and slide

  In most cases, for easy assembly and good mechanical resistance, the sizing of the tenons and slides is incompatible with the width of a module, or at least a front pre-positioning of the accessory before engagement of the slides. As a result, we do not use this

  fixation mode only for elements of 2 or 4 modules.

  The existence of accessories to at least two modules

  such as in the case of auxiliary contacts or a contact occupies a module, a major disadvantage for the user who must have

  a stock of different models each of which has a specific configuration

ticular.

  In the case of auxiliary contacts, the

  two modules must be of 4 different types: a first type with two closing contacts; a second with a closing contact and then an opening contact, in order; a third with an opening contact and a closing contact in order; and a fourth with

two opening contacts.

  In the case of four-module elements, the number of

types to manufacture is 16.

  Due to the fact that on single-piece contactors with tenon and slide fixing for up to four modules, the fastening device is central because of the width of the fastening system.

  can not fix elements to three modules because the fixation would then be de-

  centered on the element and it would be unbalanced.

  It is therefore interesting to have elements

  only one module that can be attached to the contactor at one of the four

  possible investments while having a secure fixation and a width such

  that we can fix two, three or four side by side on the contactor.

  The advantages of such an element are many. Among other things, for auxiliary contacts, just make a type

  opening contact element and a type of closure contact element

  re that we can dispose as needed on the contactor.

  For the user, it will be enough to pass from two to three modules for example, to buy a third module that will be set next to the previous ones, whereas so far with known elements with 2 or 4 modules; the two-module element had to be replaced by an element

  four modules (the two-module element is no longer used and the fourth one

  me module of the four-module element being useless).

  The object of the invention is therefore to provide an element with a single module whose attachment to the contactor is secure. According to the invention, this attachment combines the snap hook system, which allows a small width for the element, and the tenon and slide system which ensures a perfect attachment and further allows a guide of the element

during its establishment.

For this purpose, the device comprises

  a T-shaped post disposed on the face of the contact

  at the attachment point of the accessory, cooperating with a sliding

  located at the base of the accessory on its face facing the contact

tor;

  - a hook located at the top of the access

  on its face facing the contactor cooperating with a rim of a cell located in the contactor; and - a pawl located on the accessory that can penetrate

  in a rectangular hole in the contactor face to lock the ac-

  cessation in hung position by preventing a vertical displacement of

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  the accessory in relation to the contactor.

  The accessory comprises a contact carrier slider also connected to a slider of the contactor by a set of tenon and slide. The invention will now be described by means of an exemplary embodiment shown in the accompanying drawing, of which: FIG. 1 is a side view and in partial section;

  of the system for attaching an auxiliary contact to a contact

  monoblock, and FIG. 2 is a horizontal sectional view according to the

  line II-II of Figure 1 of the tenon system and slide.

  The front face 1 of the one-piece contactor on which the accessories are fixed, comprises in its lower part at least four tenons 2 in the shape of T. Its upper part is flat and has a rectangular hole 18 and a cell 13 above of each

tenon 2.

  The cell 13 comprises at its upper part an oblique sliding ramp 14 and at its lower part an engaging flange 15. The slider 3 of the contactor comprises, at its end external to the contactor, also T-shaped tenons 4 above each tenon

2 and in equal number.

  The auxiliary contact 5, which in the example is a con-

  closure of a module, has on the upper part of the

  this 7 being fixed to the contactor hook 6 directed downwards for the hook-

  chage on the flange 15 of the contactor and a chamfer 11 above the crank

  Chet for sliding against the ramp 14. At the lower part of the face 7 is a recess 8, a portion 8a allows the passage of the head 9a of the contact-holder slide 9 and a portion 8b, located below is provided with two lateral thickenings forming a T-shaped slide corresponding to the T2 at the contactor. The end 9a of the slider

  9 is also shaped as a slide corresponding to the T4 stud of the neck.

lisseau 3 of the contactor.

  In a recess located behind the hook 6 is

  a tilting pawl 17, a protrusion 16 protrudes from the module under the hook 6 when the pawl is biased to the right (according to FIG. 1) by its elastic part 19. An arm 20 of the pawl 17 allows it to stop against the wall of the recess and to be held in the position

  the protrusion 16 protrudes below the hook 6.

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  The installation of the accessory 5 is as follows The operator places the accessory in front of the position

  chosen on the switch where it must be hooked, in a

  heavily sloped backward so that the slider 8b, 10

  slightly engages the contactor post 2, and the head 9a of the slide

  Bucket 9, which pre-positions itself naturally, engages slightly on the

  tenon 4 of the slider 3 of the contactor.

  Chamfer 11 then meets ramp 14 and access

  In the vertical position, the downward movement is continued, the hook 6 enters the cell 13 and the projection 16 of the pawl 17 abuts against the rim 15. The ratchet is then tilted to

  the rear against the elastic portion 19. The slide 8b, 10 is then

  spun on the post 2, the thickenings 10 are engaged in the grooves 12 thereof, and the hook 6 is hooked to the rim 15 blocking and

  the accessory. The projection 16 of the pawl 17 has penetrated into the rectangular hole.

  18 and, under the pressure of the elastic portion 19, locks the access

  in the hung position by preventing any vertical movement of

this one with respect to the contactor.

  For the stall, simply bring the arm 20 of the

  ratchet backward, as shown in the figure, and perform the series of movements

  in the reverse order, the accessory being removed after the

  tilting backwards which releases the hook 6 of the cell 13.

  The advantages of the invention are manifold.

  The hook allows secure hooking, while the slide

  The bottom seat can keep walls thick enough to be solid because it must not pass over a slide or post

superior playing the same role.

  Due to its small size, this hanging system makes it possible to produce accessories to a single module, which makes it possible to

  Arrange 1, 2, 3 and / or 4 on the switch.

  The coupling of the contact carrier slider to the contactor slider is ensured from the installation of the auxiliary contact without

subsequent manipulation.

  It goes without saying that such a mono-module accessory can be

  mounting in larger or smaller numbers on contactors larger than

  higher (that is to say, with a larger clean module); it is sufficient for this purpose to provide on these contactors fixing details and details

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  coupling the slide in the width of the module of the accessory.

  It is obvious that the invention is not limited to the

  auxiliary contacts but can also be used for the attachment of other elements including memory blocks, timer blocks (with one, two, three or four modules> etc., the snapping can be performed from the first cell in the case of an element

less than four modules.

Claims (2)

R E V E N D I C A T IO N S   1. - Fixing device accessory size reduced width, including mono-modular auxiliary contact on a monobloc contactor, characterized in that it comprises: - a single T-shaped pin (2) disposed on the face (1) of the contactor at the attachment location of the accessory, cooperating with a single slide (8) located at the base of the accessory on its face (7) facing the contactor,   - a hook (6) arranged at the top of the ac-   outlet, on its face (7) facing the contactor, cooperating with a flange (15) of a cell (13) located in the contactor, and - a pawl (17) located on the accessory (5) which can penetrate into a rectangular hole (18) of the face (1) of the switch to lock the accessory in the hooked position preventing movement   vertical of the accessory relative to the contactor.   2. - Device according to claim 1, characterized in that the accessory (5) comprises a contact carrier slider (9) also connected to a slider (3) of the contactor by a tenon assembly (9a) and slide (4).