CH643385A5 - SET OF FIXING PINS. - Google Patents

Description

The present invention relates to a set of prerequisite pins. A similar tangle occurs eg fixation which can be used to attach cards or lement when we temporarily replace in the box one of the labels to articles, and whose pins are anchored to set of pins when use and remove it like comb teeth, through pieces of an-40 then out of the box for reuse. On the other hand, crage, on a connecting rod relative to which they when loading a set of pins in a machine are oriented at right angles. to label, for the use of these pins, the group of

The fixing pins in question are well known, gles can also start to oscillate when, as described, for example, in US Patent No. 3,103,666, seeks to introduce them into the goods. As a result, which relates to a pin composed of a head, a 45 quence bar, the heads can become tangled, which makes the cross-section difficult and a filiform body connecting together these two cutting pins which have been inserted into the goods. , first elements, the pin having come in one piece In order to eliminate this drawback, it has been proposed to connect molded in a synthetic resin, such as nylon or poly- the heads of the adjacent pins by a wire of connection. Tou-propylene. In general, such a pin is given, however, such a connecting wire is stretched and torn off at the time of reduced dimensions, for example such as the crossbar 50 where each pin inserted into a diameter is separated by cutting. from 0.8 to 1.0 mm and a length of 8 to 10 mm the device of their assembly. As a result, head appendages having a width of 8 to 10 mm, a height of 3 to 5 in the shape of a mustache protrude from the surface of the heads by mm and a thickness of 0.7 to 1.0 mm. Regarding the each pin thus cut. For example, in the case of a filiform body, it generally has a length of 7 to 125 nylon pins, when the connection wires mentioned above, after elongation, the value of this length being below are stretched up '' when torn off, the filiform body chosen according to the nature of the articulation with which the pin owes the pin also stretches, up to a length corresponding to be used, and a minimum diameter of 0.3 to 0.4 mm after laying about 4 or 5 times its original length, so elongation. In addition, each fixing pin has a weight that forms a "mustache" of great length exceeding 0.04 to 0.1 g. These fixing pins are therefore very fine. On the surface of the pin head. The articles to which we can concerning the shape of the head of the pin, we know, par60 attaching labels by means of fixing pins in ques-example, a rectangular shape, as shown in the tion are very varied in nature . It will be readily understood that, in FIG. 1 (A) of the appended drawing, and a form comprising one in the case of fabric articles or knitted articles constituted by a roof-shaped upper edge, as shown in the figure of thin fiber, the "Whiskers" mentioned above are 1 (B) of this same drawing. likely to cause faults, such as cuts

Because of their very small dimensions, mentioned in es or <} es fraying, when these whiskers catch on in the description above, these pins are produced by these fibers. It is moreover very difficult to impart to the thread of age in the form of an assembly comprising a plurality of bonding a fineness sufficient to eliminate the faults pinned anchored in the manner of comb teeth on a rod. caused by the presence of "whiskers". Indeed, the

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lower limit of the diameter of the connection wire is of the order of 0.1 to 0.15 mm, in the current state of the art of manufacturing molds. On the other hand, if one confers too great a fineness in the connection wire, it is likely to be cut during the transport or the handling of the set of pins. A set of pins with a partially cut lead wire can pose even more complicated entanglement problems than those encountered in the case of a pin set without a lead wire, which results in even more difficult handling. On the other hand, the formation of a connection wire of such finesse requires very high precision in the manufacture of the mold, which results in a high cost price thereof accompanied by a reduction in its lifespan. Thus, whatever the thickness of the connection wire, the various difficulties mentioned above are the cause that its use is considered undesirable.

The object of the invention is precisely to eliminate the drawbacks indicated above.

To this end, the set of pins according to the invention has the characteristics specified in claim 1.

The invention will be better understood thanks to the detailed description which follows, given by way of example, of certain particular embodiments of the set of pins according to the invention with reference to the appended drawing in which:

FIG. 4 is an enlarged view, in side elevation,

a part of the set of pins, in accordance with a first embodiment;

Figure 5 is a front elevational view of the same assembly;

Figures 6 (A) and 6 (B) are front elevational views of a set of pins corresponding to the first embodiment as it occurs before the elongation or stretching operation ;

Figures 7,8 and 9 are top views, in plan, showing the shape of the pins heads according to a second, third and fourth embodiment, respectively;

Figure 10 is a front elevational view of a set of pins according to a fifth embodiment;

Figure 11 is a front elevational view of a set of pins according to a sixth embodiment;

Figures 12 (A) to 12 (G) are front elevational views of the pin heads according to a seventh, eighth, ninth, tenth, eleventh, twelfth and thirteenth embodiments, respectively;

Figure 13 is a front elevational view showing the shape of the head of a pin according to a fourth embodiment; and FIG. 14 is a front elevation view of a pin head, the filament of which is elongated over its entire length.

To facilitate understanding of the drawing, there is shown in Figure 4, only three pins pb p2 and p3, part of the assembly according to the first embodiment. The pin P [consists of a head 1, a transverse bar 2 and a threadlike body 3 connect these two first parts together. The pin p, thus formed is anchored by means of an anchoring part 4 on a connecting rod 5, with respect to which it is oriented at right angles. The pin P] forms a set P with the pins pi, p3, etc., which are similarly anchored on the connecting rod 5. The set of pins P consists, for example, of 25 to 50 pins p], p2, p3, etc. the number of pins in a set can, for example, go up to 100 in the case of the set having the longest connecting rod 5.

The assembly thus formed is entirely molded from a synthetic resin such as nylon or polypropylene. Immediately after the molding operation, the threadlike body has substantially the same diameter as that of the crossbar and is relatively rigid so that it is liable to break by bending. In particular, in the case where the pin is fixed to a given article by means of a machine, the transverse bar 2 is introduced into this article under conditions such that the filiform body undergoes a deformation during which it is placed in position practically parallel to the crossbar. After implantation of the crossbar 2 in the article, the fili-io shape body 3 would have difficulty recovering its initial shape, if it was left in the state obtained after molding, and would therefore retain its deformation. This is why, the filiform body 3 is subjected to an elongation, after molding, so as to give it, by orientation of the polymer molecules, the property of being flexible, while keeping its shape, so that it does not tend to stay folded.

Before the elongation treatment, the filiform body 3 may have a conical shape, as shown in FIG. 6 (A), or a shape having no taper, as shown in FIG. 2 (B).

The thickness t of the head 1 generally has a value of 0.7 to 1.0 mm, which roughly corresponds to the diameter of the crossbar 2. It should be noted that the crossbar 2 has, for example, a diameter of the order of 1.0 mm, so as to prevent it from taking on a "V" shape when the pin is installed in the article. It is usually sufficient to give the space / between the head 1 and an adjacent head the value of 0.2 mm to less than 0.7 mm, preferably 0.2 to 0.5 mm, and more particularly 0.2 to 0.3 mm. When the spacing l 30 is within these limits, the thickness of the walls which delimit the mold cavity between the heads 1 can be given a value high enough to avoid any difficulty during the molding operation. In addition, for a spacing of between 0.2 mm and less than 0.7 mm, the interval 35 between two adjacent heads is less than the thickness t of each head, so that, even in the case where sets pins come into mutual contact, the heads of the pins of one of these sets hardly tend to get into the gaps between the heads of the adjacent pins io of the other set so as to cause the tangle of pins. In addition, even if one of the pins of a set tends to move laterally, the adjacent pin moves simultaneously according to the movement of the first when the spacing l is 0.2 mm to less than 0 , 7 45 mm. In this case, the pin assembly behaves as a single piece, so that the displacement of a single pin and the irregularity of arrangement which it would tend to cause can be eliminated. This contributes to preventing the mutual entanglement of the assemblies. In particular, if the spacing vaso their 0.2 to 0.5 mm and more particularly 0.2 to 0.3 mm, the heads of the respective pins constituting the assembly can take a state in which they behave in the same way as if they were glued against each other, so that the pins can no longer move individually, which further reduces the risk of entanglement between the sets.

If a set of pins is introduced into the labeling machine and the control lever of this machine is actuated, its toothing engages on the anchoring parts 4 of 60 so as to allow the supply of pins one after the other and the successive cutting of the anchor pieces 4 of each of these pins in order to implant them in an article, one by one. In other words, the anchoring parts 4 have the function of allowing the individual supply of 65 fixing pins and of serving as a passage for the molten resin during injection into the mold. The diameter of the anchoring piece 4 must therefore be such that it poses no problem during the injection of the resin and that it also allows the de

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cutting of the part without difficulty. The connecting rod 5 also corresponds to a channel for the passage of the resin during the injection of the latter into the cavity of a mold at the time of manufacture of the assembly. Such a connecting rod can have any shape suitable for its use, for example a circular, square, semi-oval or hexagonal section shape.

In the first embodiment shown in FIGS. 4 and 5, the fact that the spacing l between the heads of the pins Pb P2> P3> etc., which constitute the set of pins P, is less than the thickness t of these heads makes it possible to prevent the heads of the pins forming part of an assembly from being inserted into the intervals between the heads of the pins of another set, even if a certain number of d 'sets of pins in a position of mutual contact. This therefore prevents entanglement of the heads and / or filiform bodies of the pins. In addition, the narrowness of the interval between the heads also makes it possible to prevent irregularities in the arrangement of the heads of the assemblies.

In accordance with the second embodiment shown in FIG. 7, the thickness t of the heads is also given a value greater than that of the spacing 1 between the adjacent heads, as in the case of the first embodiment . In addition, the heads, such as the head 1a, are deformed from the central part so as to have the shape of a chevron. Consequently, as can be seen from the top view illustrated in FIG. 7, an interval is formed between the adjacent heads 1a and 1a which also has the shape of a chevron. However, in side view, the head 1a has its end edge z hidden by the end edge of the adjacent head 1a. As a result, the arrangement of the heads is such that there is no gap between them if viewed from the side.

According to this second embodiment, the fact that the thickness t of the heads of the pins is greater than the spacing l between the heads of the adjacent pins, and the fact that the heads are arranged in such a way that no interval appears between them if they are observed laterally, the heads and / or the filiform bodies have even less tendency to become entangled than in the case of the first embodiment, even if a plurality of assemblies is maintained pins in mutual contact. In particular, due to the deformation of the heads at the central part with change of their orientation, as shown in FIG. 7, the heads of the pins of one of the assemblies cannot exceed the central part of the heads of the pins of the 'other set, even in case the heads of the two sets become tangled. This therefore makes it possible to prevent entanglement even more effectively and allows easy disentangling in the event of entanglement. In addition, even in the case where the head of one of the pins of one of the assemblies, for example the head 1a, would move laterally out of alignment with the other heads, its end edge z would come in contact with the end edge y of the head of the adjacent pin la, which would further contribute to preventing the production of an irregularity in the arrangement of the heads.

In the third embodiment, shown in FIG. 8, the pin head has, both on its front face and on its rear face, inclined surfaces c and d which extend from the connection point of the filiform body of the pin to the lateral edges of the head, and are arranged symmetrically with respect to this point. In this third embodiment, the thickness t of the heads is also given a value greater than the spacing 1 between the adjacent heads, the heads having a section in the shape of a parallelogram. As a result, the heads that are part of one set cannot enter further than up to half the gap between the heads of another set, thus preventing complete overlapping of the heads d 'one set by those of the other set. On the other hand, in case of entanglement of the heads, it is possible to separate them without difficulty.

Furthermore, in accordance with this third form of execution, if the original thickness of the heads is designated part t, the heads can be thinned to a thickness of (t-ti) by reducing their initial thickness up to a value t! at their side edges. This makes it possible to correspondingly increase the thickness of the walls delimiting the cavities of the mold used for manufacturing the assembly, which increases the mechanical resistance of this mold. On the other hand, the particular shape of the pin heads in this third embodiment makes it possible to facilitate demolding of the assembly.

i5 According to the fourth embodiment of the assembly, shown in Figure 9, each of the pin heads has its right and left halves inclined in the same direction, during molding, starting from the central part of the heads , in the form of an enlarged letter “V”, seen from above. Consequently, when the heads are viewed from the side, they appear as if there is no gap between them, as in the case of the second embodiment represented in FIG. 7. In at the same time, since the intervals between the heads change direction in the possible direction of advancement of the heads, a head belonging to a given set cannot be introduced further than halfway between the 'interval between two adjacent heads of another set of pins, so that one can easily separate the heads of two respective sets which would tend to mingle.

Furthermore, in the assembly represented in FIG. 9, in the event that one of the pins moves transversely out of its initial position of alignment with the others, its head will come into contact at its point of inflection e with the edge 35 of end f of the adjacent head ld which would contribute to the maintenance of a well-ordered arrangement of the pins by opposing the appearance of any irregularity.

During the description, given above, of embodiments going from the first to the fourth, the arrangement of the 40 pins in a set has been indicated with reference to the front and top views. However, the shape of each of the pins in front elevation also plays an important role in preventing tangling of the pins. This form can be very varied, as will be seen from the description which follows. As can be seen in FIG. 5, which represents the first embodiment described above, the lower edges g and h of the pin head 1 are given a shape such that its edges gradually move away from the crossbar 2 away from the filiform body 3. It follows that, in the case where the pin heads 1 become tangled, their separation would be done automatically by the inclination of these lower edges g and h.

FIG. 10 represents a fifth embodiment in which the head 1 has the shape of a Braun tube having its 55 lower edges g and h curved. In this case, the effect opposing the entanglement of the pin heads is even more marked than in the case where the lower edges g and h are rec-tilinear as shown in FIG. 5.

Figure 11 shows a sixth embodiment 60 in which the head 1 is molded so as to be inclined to the left with respect to its axis. As a result, the lower right edge g is strongly inclined. In the case where pins thus formed become tangled, for example in the case where the head of another pin is hooked 65 by the lower edge g, the separation of the tangled heads would be easy because of the steep slope of the lower edge g. On the contrary, in the case where it would be the other lower edge h which would hang the head of another pin, the head 1 would be

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moved to the right in the position indicated by a line clean and neat placement of the label in the

in broken lines, which would also allow the separation, although the shape of the head 1 makes it susceptible to oscil-tion of tangled heads. The separation of tangled pins 1st with respect to the filiform body.

can therefore be made easier by tilting the heads either to the right As indicated above, the spacing l gives

either to the left. 5 be the heads of the pins a value lower than that of the thick-

Figures 12 (A) to 12 (G) respectively illustrate the seur of these heads, this value usually being understood embodiments ranging from the seventh to thirteenth. In the between 0.2 mm and less than 0.7 mm, and being preferably of the seventh embodiment shown in Figure 12 (A), the 0.2 to 0.5 mm and more particularly of 0 , 2 to 0.3 mm. The pin head fact is molded in the shape of a triangle whose tip which we have the relation t> /, makes it possible to prevent the heads is directed downwards. In the embodiments ranging from the io of pins forming part of a given set to fit eighth to tenth, which are shown in Figures 12 (A) between the intervals between the heads of the pins from one to 12 (D), the pin head is molded, respectively, into another assembly causing the pins to become entangled, the shape of a semicircle and heart circle sector. In the 100 sets of pins with a spacing of 1 = 0.6 embodiments ranging from the eleventh to the thirteenth, represented by the first embodiment of the invention shown in FIGS. 12 ( E) at 12 (G), the head has its lower edges, described above, and 100 sets of pins in the -res g and h tightened towards the axis of the filiform body 3, which t is less than or equal to /, in accordance with prior art as shown for example in Figure 12 (T). We can laugh (the sets of pins of these two types comprising molding the heads having the shapes shown in any one- however the same number of pins anchored on their rod as in Figures 12 (A) to 12 (G ), or symmetrically by connection) were, respectively, placed in bulk in ports at the axis of the filiform body, as shown in FIG. 20 different boxes then submitted, during a period of 10, or with an inclination towards the right or to the left, fixed duration, to a moderate agitation movement, as shown in FIG. 11. For example, the case in the middle of a machine carrying out a forward movement and which head having the the shape shown in figure 12 (D) is invented. After which, the sets of boxes were removed, some tilted to the left with respect to the axis of the filiform body is after the others, counting the number of these sets as illustrated in FIG. 13. In this example, the lower edge g of 25 overlapped between them. The average values obtained are indila ballast oriented substantially in the axis of the filiform body as listed in the following table:

3. This further increases the effectiveness of the effect which allows the separation of pins which become tangled. Thus, in Ensemble Ensemble, the case where head 1 becomes entangled by its inferior edge, the invention of known type neure h, it would be pushed back to the right, in the position 30

tion indicated by a broken line, which per- q 4 2 6

would put his separation. ''

Returning to the description of the first form of execution. This table shows the remarkable improvement obtained, shown in FIGS. 4 to 5, it can be seen that there remains a portion 35 with respect to the known sets of pins, also well of the non-elongated 3 'between the head 1 and filiform body 3. The role from the point of view of preventing the entanglement of the pins of such a non-elongated part, if any, 3', is to serve as a facility of separation of tangled pins. In use allowing the obtaining of pins having filiform bodies, because of the relationship t> /, as described below, of shapes 3 of different lengths, according to their degree of elongation, compact assemblies having a larger size are obtained from the corresponding unstretched pins. In 40 number of pins for a given length of the rod in addition, the fact that the unstretched parts 3 'serve as a buffer, connection, which allows the continuous use of a plus no abnormal tension is applied on the filiform body 3 large number of pins. In addition, thanks to the corresponding compact anchoring, which prevents the latter from breaking from the extension of the pins on the connection rod, the assembly is perfectly presented. in a more collected form, in which the threadlike bodies

FIG. 14 represents the case in which the part 3 ′ is 45 of the pins have little tendency to oscillate and to have completely elongated, the filiform body 3 having an irregularly diameter, which gives these sets an excellent uniform, from crossbar 2 to head 1. Makes presentation slow while facilitating their handling. By thus lengthening the filiform body 3 over its entire length aug- moreover, the increase in the number of pins per unit of lon-ment its resistance and flexibility, despite its decrease in connection with the connecting rod allows improve the diameter producti, which facilitates the fixing of the pin by means of 50 of these pins, thanks to the use of molds more com-the labeling machine. This also makes it possible to make pacts, and to reduce the cost price of each pin.

2 sheets of drawings

Claims (8)

643385 2 CLAIMS connection, as shown in Figure 2, in order to hold 1. Set of fastening pins whose pins are account of the requirements of their manufacture and their use, anchored in the manner of comb teeth via We will now give a detailed description of such a part anchor on a connecting rod relative to the assembly with reference to FIG. 2. Each pin is made up of which they are oriented at right angles, each of these pins a head 1, a transverse bar 2 and a filiform body 3 adjusted being constituted by a head, a transverse bar and a binder between them the two parts 1 and 2. The pins thus filiform body connecting the head to the transverse bar, characterized are anchored on a connecting rod 5, which receives a laughingstock by the fact that the interval between the heads of two pins, the plurality of these pins fixed, by means of adjacent pieces, is smaller than the thickness of each of these respective angles 4, way to be oriented are at head angle. io straight with respect to the connecting rod 5 thereby forming a 2. Assembly according to claim 1, characterized by the fact of assembly of fixing pins A. that said interval is from 0.2 to less than 0.7 mm. In general, the number of pins attached to a rod 3. Assembly according to claim 1, characterized by the fact connection is from 25 to 50. When the filiform body 3 to one that said interval is from 0.2 to 0.5 mm. relatively short length, from 7 to 20 mm, the anchoring of 4. The assembly of claim 1, characterized by the factJ5 pins is done regularly. On the other hand, in the case where said interval is from 0.2 to 0.3 mm. the length of the filiform body is more than 20 mm, the 5. Assembly according to one of claims 1 to 4, pins-pins become able to swing so that their laughing at the fact that the heads of pins have, in top view, head 1 can change their position without offering resistance, a form of chevron. so that the filiform bodies 3 and the heads I become entangled. By 6. Assembly according to one of claims 1 to 4, character-20, in the case where the fixing pins are made risé by the fact that each of the heads of the pins has a nylon shape, they have a relatively stable shape immediate-such that its front side as well as its rear side have surges after the molding and stretching operation. However, the faces which gradually incline from the end of the filiform bodies 3 gradually soften by filiform ab-bodies to the lateral edges of the head, symmetrization of moisture from the ambient atmosphere. It only relative to this end. 25 as a result that the sets of pins overlap each other 7. Assembly according to one of claims 1 to 4, character- in the others when they come into mutual contact or laughed at by the fact that the heads of the pins have, in top view, that the arrangement of the pins in each sets becomes an irregular V shape. In practice, after molding the assemblies 8. The assembly as claimed in one of claims 1 to 7, with pins, a number of these assemblies are packed, rised by the fact that the parts of the edges of each of the heads are in a box for their subsequent transport. Due to the fact that pins facing the crossbar are conforming, the heads of the pins of the assemblies A] and A2 are entwined so as to retract away from this bar when overlapping the as shown in Figure 3 of the drawing an-they move away from the threadlike body of the pin. . attached, several sets of pins are removed simultaneously from the box when one seeks to take out only one. 35 This results in the disadvantage that one cannot use a set of pins without having untangled it