JPS6058007B2 - Fastener chain manufacturing equipment with space part - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is characterized in that punch holes for fixing the fasteners are arranged in advance in a predetermined range along one side edge, and then the punch holes are punched again after leaving a space where no punch holes are to be punched. A long fastener tape (hereinafter abbreviated as tape) on which a punching area is provided is introduced into a synthetic resin injection molding machine that has a mold in which a large number of fastener molds that match the punching area are arranged in a row. ,
This relates to a device that continuously manufactures a fastener chain for slide fasteners by repeatedly forming and fixing fasteners on punched holes.In detail, it involves punching a space part of a predetermined length and a punch hole of a predetermined length. The pitch of the punch holes in the tape, which has alternating ranges, is made narrower than the pitch of the fasteners in the mold, and tension is applied to the tape to give a predetermined elongation when tightening the mold plate immediately before injection molding. In addition, the present invention relates to a fastener chain manufacturing apparatus that has an improved tape supply device that has a tension applying mechanism that always adapts the punch hole position of the tape to the fastener type position.

The present inventor first introduced a tape with continuous punch holes arranged along its side edge into a synthetic resin injection molding machine for molding teeth.
In order to match the pitch of punch holes to the pitch of the fastening teeth of the mold, we apply tension to the tape when tightening the mold plate, stretch it, and repeat the fastening process of fastening the fastening teeth to produce long slide fastener chains. The invention of a device for
A long slide fastener chain is obtained by fixing fastening teeth continuously to a tape, and it is used as it is to manufacture standard-length slide fasteners that have spaces where fastening teeth are not fixed before and after the fastening teeth fixing range. It was not applicable. In order to continuously manufacture a fastener chain having a space for a slide fastener of a fixed length, it is necessary to provide a tape feeding mechanism and a tensioning mechanism together with a corresponding fastener forming mold. has obtained a manufacturing device that satisfies this need,
Its feature is an engagement wheel with a large number of engagement teeth protruding from the circumferential surface that fit into the punch holes of a long tape where the space portion and the punch hole array area are repeated alternately in the length direction. and a reversing drum for guiding the tape, and when the tape space comes into contact, the spindle of the engagement wheel is moved and the engagement tooth is placed under the circumferential surface of the tape contacting surface of the idler drum. When the tip of the tape reaches the punch hole area and comes into contact, move the spindle of the engagement wheel in the opposite direction to the above, and move the engagement teeth around the tape contact surface side of the idler drum. Engagement wheels and idler drums are provided in upper and lower stages, respectively, so as to protrude above the surface and fit into and engage punch holes in the tape to ensure tape retention and transfer. The respective support shafts are interlocked via intermediate shafts, and the intermediate shafts are connected to a reversing drive mechanism for stretching the tape when the mold plate of the interlocking injection molding machine is tightened.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view showing the slide fastener stringer at the stage of molding and fixing the fastener E using this device, and shows the fastener fixing range L and the fixed pitch interval where the fastener has not yet been molded and fixed. Provided punch hole H drilling range L''
A space S without a punch hole H corresponding to the ear to be formed at the front and rear ends of the slide fastener.
This is a partially cutaway illustration of the state in which the holder is provided.

W is the reinforcing edge of the tape T to which the fastener E is fixed, and usually has a core cord woven into it. Fig. 2 is a side view of an embodiment of the device of the present invention, Fig. 3 is an enlarged side view of the main part of the tape feed adjustment section C, and Fig. 4 is a cross-sectional view of the main part further enlarged from Fig. 3. FIG.

In the drawing, 1 is a machine base, 2 is a movable mold installed on the machine base and operated by hydraulic pressure, etc., and 3 is a fixed mold opposing this. Tape T bowls having alternately predetermined space portions S and punch hole H punching ranges L'' at predetermined pitch intervals are transported in parallel at predetermined intervals with their punch hole side edges facing each other. , a post 8 that takes off from a take-up spool (not shown),
9, a tape feed device consisting of feed rolls 10 and 11 provided at the upper end thereof, and a step roll 12 that moves up and down in the middle thereof, and a tape feed adjustment section C connected thereto. If the stand 4 is provided so that it can be adjusted up and down with respect to the machine stand 1, the distance between the tape feed adjustment section C and the molds 2 and 3 can be changed to accommodate changes in tape feed conditions. .

Below both molds 2 and 3, there is provided a feed roll 7 which is driven to be able to rotate in forward and reverse directions for moving the fastener chain F on which the fastening teeth E have been molded and fixed. , a detector consisting of a light source 60 and a phototube 61 for detecting the edge of the tape interlock molding part is provided.

The above-mentioned tape feeding adjustment section C is arranged between support plates 5 and 6 erected on the pedestal 4, with hollow shafts 15 and 16 protruding from the support plates 5 and 6 at the top, and upper rotating drums 17 and 18, respectively. is rotatably supported, and passes through the hollow shafts 15 and 16, and a support shaft 19 having a diameter smaller than the inner diameter of the hollow shaft extends to the outside of both support plates 5 and 6. The supporting shaft 19 has a large number of engaging teeth arranged in two rows in parallel in the circumferential direction on the circumferential surface. The engagement wheel 13 having a protruding portion 23 is fixed thereto.

The engagement wheel 13 is located between the idling drums 17 and 18 which are supported by hollow shafts 15 and 16, and the rotation axes of the engagement wheel 13 and the idling drums 17 and 18 are aligned by the movement of the support shaft 19. The positions of parallel axes may be coincident or separate. Furthermore, an engagement wheel 33 and lower idler drums 37 and 38 having the same structure as the one provided at the upper part and having engagement teeth 23'' are pivotally supported at the lower part of the support plates 5 and 6. The support shaft 39 to which the support shaft 33 is fixed is pivotally supported at both ends of the support shaft 39 under the rocking plates 21 and 22, respectively.
A ratchet wheel 24 and an intermediate gear 25 are fixedly attached to the upper part, and the intermediate gear 25 is a gear 2 fixed to the upper support shaft 19.
6. Each gear meshes with the gear 27 fixed to the lower support shaft 39, and each shaft rotates in conjunction with each other.

Reference numeral 28 denotes a support base plate fixed to the support plates 5 and 6, to which a first air cylinder 29 and a second air cylinder 30 are fixed. It is connected to the upper parts of 21 and 22.

The piston rod 34 of the second air cylinder 30 is in contact with a pushing rod 36 which is biased in the retraction direction by a spring 35, and the pushing rod 36 is slidably supported by the support base plate 28 and is A swinging and rotating beak-like claw 40 is pressed clockwise (in Fig. 3) by a spring 35'' at the tip.
The distal end of the beak-like pawl 40 can be engaged with the peripheral teeth of the ratchet wheel 24. 41 is the swing plate 21
, 22 in a constant direction, and 7
0 is a light source, 71 is a phototube, and thereby the tape T
This is to detect the space part S of.

Note that 42, 43, 44, and 45 are guide rolls that contact and guide the tape T to the upper idler drums 17 and 18 and the lower idler drums 37 and 38, and are connected to support shafts 50 fixed to the support plates 5 and 6. An idling drum is rotatably supported at the ends of branch rods 54 and 56, which are rotatably supported at the ends of support rods 53 and 55, respectively, which are pressed by springs 51 and 52. The tape T is held under pressure on surfaces 17, 18, 37, and 38.

In the apparatus of the present invention having the above configuration, the slide fastener chain F is continuously manufactured by repeating injection molding of synthetic resin fasteners onto a tape through the following steps.

An injection mold for the connecting tooth E having a structure as shown in FIGS. 10 and 11 is prepared in advance.

On the opposing mold surfaces of the movable mold 2 and the fixed mold 3, a large number of fastener molds 14 having a predetermined pitch interval D are bored over a predetermined length L, and are connected by a runner groove 63 and a gate groove 64.
A tape guide groove 65 is provided on the fixed mold 3 side, and a flat surface portion 66 forming the space S of the tape T and a flat surface portion 66 at the lower end of the injection nozzle nozzle 62 for synthetic resin molten metal and the tooth mold 14 portion are provided on the fixed mold 3 side. A receiving hole 69 is provided, into which the tip of a filler 68 protruding from the mold surface to which the rear end of the runner R is engaged is fitted.

Between the surfaces of the mold, punch holes H with a pitch interval d slightly narrower than the pitch interval D of the mold tooth shape are formed over a predetermined range L''.
Two tapes T having a space S are inserted in parallel at a predetermined interval.

The last tooth E″ of the fastener chain formed at the front
When detected by the phototube detectors 60 and 61, feeding of the tape T is stopped.

Next, when the movable mold 2 approaches the fixed mold 3 and is in a temporarily tightened state, the tape T is rolled by the feed roll 7.
Filler 68 and runner R of the preceding zipper chain
The rear end is fed backwards until the rearmost tooth E'' comes into contact with the step 67 of the mold. After that, pressure acts on the second air cylinder 30, and the ratchet wheel 24 is rotated by a predetermined angle. The upper and lower engagement wheels 13 of the tape feeding adjustment section C are interlocked via the intermediate gear 25 and the gears 26 and 27.
33 is reversed, and the last fitting tooth E'' of the previously formed fitting teeth
A tensile force is applied to the tape T in a state where it is engaged with the stepped portion 67, and the punch hole pitch interval d is expanded to become the tooth-shaped pitch interval D, thereby performing main mold clamping.

Thereafter, injection molding of the fastener E is performed, the movable mold 2 is opened, and the molded fastener E is removed from the mold by an ejector turbine (not shown).

At this time, the connecting teeth formed on the two tapes T are connected by the runner R1 gate G, but at the same time as demolding, the lower feed roll 7 is driven in the feeding direction, and the runner between the feed rolls 7 The R1 gate G is cut out and the two fastener chains F are transferred towards a product take-off device (not shown).

At the time of this transfer, the tape supply spool is stopped by braking, and the step roll 12 is raised sequentially from the lowered position, and the tape portion held there is transferred to the tape feed adjustment section C via the guide roll 42. be done.

In this state, the support shaft 19 of the upper engagement wheel 13 is moved by the spring 41 so that the engagement teeth 23 are hidden inward from the tape contact side circumferential surface of the upper idler drums 17, 18 (see left side in FIG. 3). The lower engagement wheel 33
The support shaft 39 has been moved to the right so that the engaging teeth 23 protrude from the tape contact side circumferential surfaces of the lower idling drums 37, 38.

Therefore, at this time, the engagement tooth 2 of the lower engagement wheel 33
3'' and the punch hole H of the tape T engage, and the tape T is fed.Then, the space portion S of the tape T becomes 70,
When detected by the phototube detector 71, the first air cylinder 29 is activated after a predetermined time by a timer.

While the timer is operating, the space section S is the upper idler drum 17.
, 18, and is sent to the front of the lower idling drums 37, 38. At this point, as shown in Figure 5, the first
The air cylinder 29 pushes out the piston rod 31,
The engagement teeth 23'' of the lower engagement wheel 33 are sunk inward of the tape contact side peripheral surfaces of the lower idler drums 37, 38, and the upper engagement wheel 13 moves in the opposite direction to the lower engagement wheel 33. The engagement tooth 23 protrudes and engages with the punch hole H of the tape T, and the engagement wheel 13 rotates as the tape T is fed.The upper engagement wheel 33 connects to the gear 26 and the gear 27 via the intermediate gear 25. Because they are connected by Tape T with part S
Even if the tape T is not deformed, distorted, or damaged due to the pushing up of the engagement teeth 23, 23'' against the space portion, the tape T can be smoothly sent to the engagement tooth ejection position.

When the space portion S passes through the lower rotating drums 37 and 38, the first air cylinder 29 returns to its original position, and the lower engagement tooth 23'' projects again due to the elastic force of the spring 41 and engages with the punch hole H. to return to the original state.

During the conveyance of the tape T, each guide roll 42, 43, 44, 4
5 and pressure rolls 46, 47, 48, 49, the tape T is wound around a part of the peripheral surface of both idle drums 17, 18, 37, 38 without loosening.

The above conditions are as shown in FIGS. 6 to 9, and when the punching range L'' of the punch hole H of the tape T in FIG. When the engaging tooth 23 of the engaging wheel 13 is inserted into the punch hole H and transferred, and the space S of the tape T in FIG. The supporting shaft moves to the left due to the elastic force of the spring 41, and the engaging tooth 2
3 is located inward of the idling drums 17 and 18 as shown in FIG. 8, or the lower idling drums 37 and 38
, the contact relationship between the engagement tooth 23'' of the engagement wheel 33 and the tape T is also the same as above.

The upper and lower engagement wheels 13, 33 have the engagement teeth 23, 23'' alternately moved in and out by the swing plates 21, 22, and are rotated in conjunction with the intermediate gear 25, so that the punch holes in the tape T are The upper and lower idle drums 17, 18, 37, 3 are adjusted according to the total length of the drilling range L'' and the space S.
8, the diameter and center distance of the engagement wheels 13, 33, and the range L'' of punching holes of the tape T in the lower idler drums 37, 38 according to the tooth injection molding process.
are in contact with each other, and the tape T is securely held on the lower rotating drums 37 and 38 by the engagement between the engagement teeth 23'' and the punch holes H, and temporary mold clamping of the injection molding machine is performed. The tape T can be stretched in a predetermined manner by operating the second air cylinder 30. In addition, when the space portion S of the tape T or the punched hole punching range L'' changes, the above-mentioned mount 4 can be moved up and down. The amount of stretching of the tape T can be adjusted by changing the mold and changing the amount of protrusion of the pushing rod 36 operated by the second air cylinder 30.

In the embodiment described above, the upper and lower engagement wheels 13, 33 are always moved alternately by the rocking plates 21, 22, but the axes of the engagement wheels 13, 33 are moved by separate air cylinders. If the operation is set at an appropriate timing, it is possible to easily respond to changes in the conditions of the tape T. In this way, the tape T can be moved up and down unless a space is located on the idler drum. Since the tape is fed while being engaged with both engaging wheels, stable tape feeding can be obtained. As explained above, according to the present invention,
For tapes with spaces, the tape feeding adjustment necessary for synthetic resin fastener injection molding, such as reliable transport, holding, and stretching, can be performed without any negative effect on the tape, and the fasteners are The industrial effect is extremely large in that it is possible to obtain a slide fastener of uniform quality that is firmly fixed.

[Brief explanation of the drawing]

Fig. 1 is a partial front view of the tape supplied to the device of the present invention, including the part where the interlocking teeth have already been injection molded, Fig. 2 is a side view of the embodiment of the device of the present invention, and Fig. 3 is a tape feeding section. FIG. 4 is an enlarged side view of the adjustment part, FIG. 4 is a front view of the main part of FIG. 3 in cross section, FIGS. FIG. 11 is a sectional side view of the main part showing the relationship between the fixed mold and the movable mold. 1... Machine base, 2... Moving mold, 3...
・・・Fixed mold, 4... Frame, 5, 6...
...Support plate, 7...Feed roll, 12...
...Step roll, 13, 33...Engagement wheel, 15
, 16...Hollow shaft, 20...Intermediate shaft, 21, 22...
...Rocking plate, 23, 23''...Engaging teeth, 24.
... Ratchet wheel, 25 ... Intermediate gear, 2
6, 27...Gear, 29...First air cylinder, 30...Second air cylinder, 17,18...Upper rotating drum, 37, 38・
...lower rotating drum, T...tape, C...
...Tape feeding adjustment section, L...Fixing tooth fixing range, L''...Punching hole drilling range, S...
・Space part, H...Punch hole, E...
・Work teeth.

Claims (1)

[Claims] 1 A tape having a fixed mold and a movable mold is provided with a punch hole punching range having punch holes with a pitch pitch narrower than the tooth pitch of the mold and a space portion of a predetermined length. In a device that manufactures a fastener chain by supplying a fastener to an injection molding machine, an engaging wheel with a large number of engaging teeth protruding from its circumferential surface is provided in contact with an idling drum provided in two stages, upper and lower. The axes of the engagement wheels are respectively linked to intermediate shafts for elongating the tape by performing a predetermined amount of reverse rotation during temporary mold tightening, and the support shaft of the engagement wheels is moved parallel to the hollow shaft of the idler drum. 1. A fastener chain manufacturing apparatus having a space portion, characterized in that it is equipped with a tape feeding adjustment mechanism that is pivotably supported to allow the tape feeding to be adjusted.