JPH05193608A - Joining mechanism for sealless bonding strap - Google Patents

Abstract

PURPOSE:To increase the strength to the material and the tension resistance of a joining mechanism of a seamless bonding strap while keeping the length of the strap overlapping part to be a minimum necessity, keep the extremely assured locking function, and make the smooth and easy combining operation possible. CONSTITUTION:A plurality of anti-tension notches 60 with a shape of the feathers of an arrow are provided on a male die toward the central direction of the strap length, in parallel with both outer edges of the strap of a strap overlapping part 50. An optional one out of the plural alignments is provided as an anti-tension lock notch 70, for which the anti-tension notch 60 is combined with a confronted lock notch with a shape of upside down feathers of an arrow or a shape being similar to it, by changing the shape of the optional one. On a female die, anti-tension notches 60 with the same shape are provided at the same locations so that those anti-tension notches 60 may correspond with respective anti-tension notches 60 on the male die when the strap is made into a ring shape and overlapped. Also, the anti- tension notch part of the anti-tension notch 70 is made to be the same shape and located at the same locations as the male die, and only the lock notch is formed in such a manner that the lock notch is made to be the same shaped as that of the male die but shifted by extremely small slip gamma to the strap end side so that it may have a latch function at the time of fitting.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is mainly designed for compressing an expansible article to circulate a strap around it without the need for a seal, and to manually rotate the article without using a binding tool or a binding device. The present invention relates to an improvement of a fastening mechanism for a sealless joining strap that connects and fastens both ends of a circumferential strap.

[0002]

BACKGROUND OF THE INVENTION For some time now, expansive articles, such as bale-filled expansible articles and cotton balers, have been compressed in order to make them expedient for storage, handling and transport. It has been generally practiced to circulate a strap and couple both ends thereof very easily and without using a seal (sealing element). The shape and arrangement of the notches for fastening formed at both ends of the strap have also been variously improved into a safer, more reliable and firmer fastening binding, which is still utilized as an important binding means at present. The main point is that the connection and fastening operation is simple, the packaging cost is low, and it is extremely economical. However, since it is a fastening mechanism of a sealless joining strap that has been useful in the distribution process of this kind of article, there are many conditional requirements for this, and although it has been cleared correspondingly, Due to severe demands, increasing the tensile strength and pursuing economic efficiency, securing 90% or more strength against the base metal, maintaining the lock function as fastening safety, reducing the polymerization length as a necessary evil, etc. There are many problems that require immediate solution.

For example, in the notch shape and arrangement shown in Japanese Utility Model Laid-Open No. 54-28682 as shown in (1) of FIG. 1 of the drawings, five notches (confrontation notches N _R ) are formed by cutting. It is known that the strength against the base material can be cleared to almost 90% or more, but with this shape and arrangement, it exerts an effective tensioning effect against the expanding action of the material to be bound, and thereby the fastening is achieved. Although it is established, when a force in the opposite direction is applied to the fastening part due to some kind of impact or external pressure,
The fastening is easily released and the disassembly of the packaging is seen. The total length of the notch group is L, and the overlapping length of the upper strap 51 and the lower strap 52 is L.

In contrast to the situation of (1) in FIG.
As shown in (2) of the above, the tension notch N _R facing the tension is
If 5 pieces are arranged in the same manner and one piece is arranged as the lock lock notch N _I which is formed by cutting the countering notch N _R in the opposite direction, it has the same anti-base metal strength as (1) of FIG. Although the problem of cancellation is solved, the length of the overlapping portion 50 of the strap becomes (L + α). This is because the total length of the notch group increases by the space of one lock notch R _I (α) and becomes (¬ + α). Thus the confrontation notch
If the N _R notch is reduced by one to sacrifice the strength against the base metal, the length of the overlapped portion will be L as in (1) of FIG. That is, knowing that it is uneconomical, is the length of the overlapped portion set to (L + α) to maintain the strength against the base metal and introduce the locking action? In addition, whether to retain the economical efficiency and introduce the locking action at the expense of the strength against the base material can be selected as a problem in the specification design of the sealless joint strap.
As mentioned above, the locking action and the strength against the base metal are almost indispensable requirements, so there is a problem that economic efficiency must be sacrificed.

In FIG. 1 (3), the counter-notches M _R1 and M _{R2 are shown.}
Examples of the fastening mechanism that cut the lock notch M _I (JP-A-55-
No. 126112), but one pair of the notch M _R1 and M _R2 corresponds to one counter notch N _R shown in (1) and (2) of FIG. It has material strength, and the length of the overlapping portion 50 is obviously as long as (L + β), forming a very uneconomical strap overlapping portion 50.

Further, the lock notches N _I and M _I in (2) and (3) of FIG. 1 are forces acting in a stable manner in the opposite direction, which is parallel to the strap overlapping portion 50 and opposite the tensile force. In contrast, the strap overlapping portion 50 exerts a locking function completely, but the strap overlapping portion 50 also has a force in a direction separating the upper strap 51 and the lower strap 52, that is, a force perpendicular to the strap overlapping portion 50. However, the locking function is not perfect in this respect. That is, the notches of the upper strap 51 and the lower strap 52 are aligned to enable coupling and fastening,
At the position where the notch positions are aligned again due to the "loosening" phenomenon of the strap overlapped portion 50 that has been tightened, the upper and lower straps can be separated from each other. If a force in the direction perpendicular to the strap overlapping portion 50 is applied (this force is naturally possible)
The fastening is easily released and the locking action becomes famous and innocent.
When a force is further applied in the "slack" direction past this alignment position, the locking action is activated. There is such a big question about the utility of the lock notches N _I and M _I , and it is a cause of trouble in practical use.

[0007]

In view of the above-mentioned circumstances, the present invention, as shown in FIG. 2 in comparison with the respective aspect diagrams of FIG. 1, shows a tension notch N _R and a tension / lock notch. The total length of the notch group including K and is contained in the range of (1) in Fig. 1 as ¬, and the strength of the notch group N _R and the tension / lock notch K is, for example, 5 against the base metal strength. The present invention has been provided as the present invention by keeping 90% or more and minimizing the length of the strap overlapping portion 50, and also conducting studies and trials aiming at perfection of the locking effect.

[0008]

The present invention has dealt with by applying the following means in order to solve the above-mentioned problems. That is, in parallel with both outer edges of the strap of the strap overlapping portion, at the center of the strap width, an arrow blade-shaped countering notch 60 is formed.
In the male type, a plurality of them are provided toward the center of the strap length, and any one of the plurality of arrangements of the notch 60 is changed in shape to face the arrow-shaped notch. It is provided as a counter-tightening lock notch 70 that combines a lock notch of a reverse arrow blade or a similar shape to this, and in the female type, when the strap is looped and polymerized, it corresponds to each of the male type tensioning notches 60. As described above, the tension notch 60 is provided in the same shape and the same position, and the tension / lock notch 70 has the tension notch portion in the same shape and position as the male type, and the opposing inverted arrow blade shape or similar. Only the lock notch of the same shape is the same type as that of the male type, but it is shifted to the end side of the strap by a very small deviation “γ” so that it is formed to have a latch function when the male type and female type are fitted. Strength against base metal while shortening It plays a high fastening, and, which is constituted as to achieve a complete positive locking effect.

[0009]

The operation of the "fastening mechanism for the sealless joining strap" (hereinafter simply referred to as the present fastening mechanism) of the present invention will be described with reference to FIGS. 10, 11 and 12 of the accompanying drawings. The tension notch 60 is substantially the same as the conventionally known tension notch in function and effect, and need not be particularly described. Therefore, only the tension / lock notch 70 will be described in detail.

The characteristic feature of this fastening mechanism is that it has a tension / lock notch.
With 70, the original function of the anti-notch and the lock function that does not contribute to the anti-tension function and occupies the overlapping space of the strap are integrated into one notch. The fact that the mating and uncoupling events at the time of alignment that had existed was completely achieved by the latch function was that the lock function as a necessary evil against the tension was absorbed and fully absorbed, and it was completed. There is a point.

That is, as shown in (1) of FIG. 12, the tensioning / locking notch 70 has a male die 70a and a female die 70b which are different from each other when the fastening mechanism is fastened. (Not shown, see FIG. 6), each of which is aligned and fitted together, and the shape, dimensions, and arrangement position of each notch cutout are designed and manufactured very accurately. It is smooth itself. However, a slight momentary pressing force is required for the crossing due to the dimensional difference between the lower notch convex protruding portion 76b and the upper notch concave protruding portion 73a.
This results in a latching action after engagement and complete locking.

The upper strap is provided at the tension / lock notch 70 of the present fastening mechanism which is fitted and joined in FIG. 12 (1).
When the 51 and the lower strap 52 are respectively pulled in the direction of the arrow T, as shown in (2) of FIG. 12, the notch projection notch 77a and the notch recess projection 72 of the upper strap 51 are provided.
The notch protruding portion 76b of the lower strap 52 bites in between the a and the a to support and support the strap tension in the direction of the arrow T, and the number of each tension notch 60 and the tension / lock notch 70 As a combined effect of the tension notch part of, the tension not less than 90% of the strength of the base metal is exerted, and the tension notch of the tension lock notch 70 is also compared with each regular tension notch 60. The tension is not inferior. The force in the direction of the arrow T is due to the expansion force after releasing the compression binding of the objects to be bound, and the fastening force is maintained satisfactorily by this expansion force that constantly acts.

In the state where the fastening and binding are maintained, the upper strap is loosened by some external pressure or impact, that is, in the direction of arrow R shown in (3) of FIG.
When the 51 and the lower strap 52 move in the opposite directions, respectively, as can be seen in the figure, the notch protruding portion 76b of the lower strap 52 becomes the notch protruding portion 78 of the upper strap 51.
By digging in between a and the notch recess projection 73a, reverse movement of the upper strap 51 and the lower strap 52 in the direction of arrow R, that is, slack of the strap is prevented, and a so-called locking effect is exhibited. However, in the process of entering this state, the intermediate point between (2) and (3) in FIG. 12, that is, (1) in FIG. Although the engagement may be released at each notch position matching point and the upper and lower notches may be disengaged (there are many cases where this actually occurred), the tension / lock notch 70 of the present fastening mechanism is shown in FIGS. 10 and 11. As can be understood from the above, the latch effect occurs due to the minimum deviation of "γ" during fitting, and the disengagement / disengagement trouble does not occur even when the notches are aligned. This is one of the major features of the invention.

In this way, the strap wraps the objects to be bound together, and complete locking and fastening of the overlapping portion 50 by the main binding mechanism is achieved. Since the binding is maintained, the strap is cut when unpacking the bound object.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 3 shows a plan view of this fastening mechanism, and FIG.
3 is shown as a side sectional view in the direction of arrow AA in FIG. 3, and in FIG.
This fastening mechanism is provided on the upper strap 51 of the strap overlapping portion 50.
As shown in the above figures, a plurality of countering notches 60 (five in this embodiment) are provided on the lower strap 52 and the lower strap 52, respectively, and are formed in the central portion in the strap width direction and in the upper strap toward the central portion in the strap longitudinal direction. Are cut and arranged. In this embodiment, four of the five are the arrow blade-shaped countering notches 60, and the one arranged in the middle is the countering / locking notch 70. The notch has an arrow vane shape and has substantially the same shape as the other tension notch 60, and a lock notch having an inverted arrow vane shape is formed by being united with the tension notch so as to face it. The countering / lock notch 70 may be arranged in the central portion, the end portion, or the root portion in the arrangement of the entire notch group, but in the present embodiment, it is arranged in the central portion. did. It is preferably provided at the end of the upper strap 52 (which is male on this side) (and therefore at the root of the female). It suffices to provide one counter tension / lock notch 70 in the main fastening mechanism of one strap, and it is not necessary to install two or more to achieve the lock function. The tension notch 60 can be increased or decreased as needed, but at this time
If the number is 5 including the lock notch 70, the tension against the base metal strength of 90% or more can be secured.

Each notch is in the arrangement described above and the upper strap 51
And when the both ends of the lower strap 52 are overlapped with each other, they are cut so that they are aligned in the same position at the same position in the upper and lower sides, but in this embodiment, the notch cut into the upper strap 51 is a male type and the notch cut into the lower strap 52 is a female type. Although it is a mold, this is not limiting and upside down is possible.

Although the notch cut into the lower strap 52 is a female type as described above, it is particularly emphasized that the tension / lock notch 70 is slightly different from the male type. In other words, the confronting notch is the same position as the male type, but the lock notch is formed by shifting the position of the inverted arrow blade-shaped shoulder portion 80 toward the end side by the minimum deviation “γ”. This point will be described later in detail with reference to the drawings.

In order to manufacture a strap having this fastening mechanism, a male mold is attached to both ends of the strap cut to a required length, and an upper end when the strap is formed into an annular shape and the both ends are superposed. The female mold is cut at the end that hits the side, but it is more accurate and more accurate to develop and notch with a separate press rather than stacking the upper strap 51 and the lower strap 52 and notching. It can be said that this is an easy processing method. However, simultaneous processing is not impossible. In addition,
Giving an extremely small dimensional difference between the male type and the female type is effective for facilitating smooth fitting, and particularly facilitates manual connection and fastening.

The tension notch 60 has a slight difference in shape from the conventionally known notch, but the action and effect are substantially the same and need not be particularly described.

The tension / lock notch 70 is characteristic of the present fastening mechanism, and in FIG. 6, the arrangement relationship with the tension notch 60, the minimum gap between the male and female inverted arrow blade shoulders is shown. Although the relationship of "γ" is shown in the figure, the amount of this minimal deviation "γ" should be set carefully, because if it is too large, it will be difficult to engage, and if it is too small, the effect of the latching action cannot be expected. ..

The confronting / locking notch 70 may have an inverted arrow vane shape, and FIGS. 7 and 8 show a part of the similar embodiment.

FIG. 9 is an enlarged detailed plan view of the counter tension / lock notch 70, and FIG. 10 is a sectional view taken along the line BB of FIG. Shoulders 80
Is deviated by "γ" from that of the male type, and this is
When the male and female types of the other tensioning notches 60 and the tensioning notches of the tensioning / locking notch 70 are aligned with each other, the notch protrusions 76b of the lower strap 52 and the notch protrusions of the upper strap 51 are already projected. It is well understood in FIG. 10 that the portion 73a wraps, and although there is some resistance in the engagement of the two (see FIG. 11), the latch effect is exhibited after the engagement. For reference, the state diagram of the male and female dies before engagement is shown as a side sectional view in a form corresponding to FIG.

Referring to an enlarged plan detail view of the confronting / locking notch 70 shown in FIG. 9, a more detailed description will be given in plan view. For the notch protrusion projection 76, a notch recess cut corresponding to the notch protrusion projection 76 is formed. Corresponding cuts are formed as notch concave projections 72 and 73 corresponding to the notch 71 and notch convex notches 77 and 78.
This allows the upper and lower straps 51, 52 to cut the notch convex portion of the upper strap 51 against tensile stress or slack stress, respectively, when the tension / lock notches 70a, 70b of the upper and lower straps 51, 52 are fitted together. Embedded part 77a or 78
The notch projection protruding portion 76b of the lower strap 52 bites into the gap between the a and the notch recess protruding portion 72a or 73a to cause a locking action, which serves as a tension or a lock. The feature of the present invention lies in that each notch has both functions.

It should be noted that the shoulder 80 of the notch projection 76 (similarly for the corresponding notch recess projection) may be at a right angle, but a slight taper is added or a frame is removed to smooth the biting action. It is preferable to perform processing.

Now, the operation of this fastening mechanism will be briefly described. First, a strap provided with this fastening mechanism is circulated around a compressed object to be bound, and at both ends, an upper strap 51 having a male notch is on the upper side and a lower strap 52 having a female notch is on the upper side. Polymerize on the bottom side. At this time, the end face having a male die is taken off, and the end face having a female die is processed into an arc shape to make the identification clear, and the distinction is easy.
Thus, the male notch and the female notch are fitted and fastened, but this fitting and fastening is done manually by an operator, which is extremely smooth and easy. However, some push force is required against the shift “γ” of the tension / lock notch 70. Thus, if the object to be bound is uncompressed, as described in detail in the section "Operation of the invention", the article is securely and firmly bound, and it is perfect for various handling such as storage and transfer of the object to be bound. Ties are guaranteed.

[0027]

As a result of the implementation of the present invention, the sealless connection strap circumflex bundling for the expandable compressed package by the operator's manual operation is performed extremely smoothly, easily, surely and firmly, and after the completion of the operation. Good packing maintenance is ensured with perfect locking action, and the overlapping portion of the strap used is economically set to the minimum necessary, which is extremely advantageous in this kind of heavy-duty binding industry, and sealless It makes a great contribution to the development of unity.

[Brief description of drawings]

FIG. 1 is a comparative explanatory view of a fastening mechanism showing a conventional example.

FIG. 2 is a mode view of a fastening mechanism to be pursued by the present invention, in comparison with a conventional example.

FIG. 3 is a plan view of the present fastening mechanism showing the embodiment.

FIG. 4 is a side sectional view of the present fastening mechanism taken along the line AA of FIG.

FIG. 5 is a perspective view of the present fastening mechanism.

FIG. 6 is a plan view in which a male type and a female type of the present fastening mechanism are divided.

FIG. 7 and

FIG. 8 is an aspect view (plan view) showing a similar range of a confronting lock notch having an inverted arrow shape.

FIG. 9 is an enlarged plan detail view of the countering / locking notch.

FIG. 10 is an enlarged side sectional view of a countering / lock notch taken along the line BB of FIG.

FIG. 11 is a sectional side view of the confronting lock notch corresponding to FIG.

FIG. 12 is a perspective view of a tension / lock notch, (1)
FIG. 3 is a mode view showing a simple fitting state, (2) a counter working state, and (3) a locking state.

[Explanation of symbols]

50 Strap overlapping section 51 Upper strap 52
Lower strap 60 Tightening notch 70 Tightening / locking notch 71
Notch recess notch 72 Notch recess protrusion 73 Notch recess protrusion 76
Notch convex protrusion 77 Notch convex notch 78 Notch convex notch 80
Shoulder.

Claims (1)

[Claims] 1. A plurality of notch fitting members which are provided at both ends of a strap cut to a required length, the strap is formed into an annular shape and the both ends are overlapped, and can be connected and fastened manually by an operator. In a fastening mechanism of a sealless joint strap having a stop portion, an arrow vane-shaped countering notch 60 is provided parallel to both outer edges of the strap in the central portion of the strap width, and in the male portion of the strap overlapping portion, directed toward the central portion of the strap length. A plurality of the notches 60 are arranged, and the shape of any one of the arrangements of the confronting notches 60 is changed to combine the arrow vane-shaped notch with the opposite notch-shaped lock notch or a lock notch having a similar shape. In the female type of the strap overlapping portion, the tension notch 60 is provided so as to correspond to each male notch 60 when the both ends of the strap are overlapped. The tensioning / locking notch 70 is provided with the tensioning notch part having the same shape and position as the male type, and only the lock notch having the inverted arrow blade shape or a similar shape is the same type as that of the male type and has a very small deviation. Only γ ”is shifted to the strap end side so that it has a latch function at the time of fitting, and it is formed by combining the tension notch and the lock notch like the male type. Achieves high strength, secure, easy, quick and robust fastening of the base metal, and
A fastening mechanism for a sealless joint strap, which is configured to perform a reliable locking function.