JPS6274634A - Detent molding equipment for double straw - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention consists of an outer straw and an inner straw that is inserted into the outer straw so that it can freely move in and out. Detent molding for double straws in which a detent is formed on the outer straw to prevent the mutually engaged parts of the inner and outer straws from accidentally coming off when the engaged double straws are extended and used. Regarding equipment.

[Conventional technology]

Up to now, various types of double straws have been proposed, which are composed of an inner and an inner straw and whose overlapping ends engage when extended (Utility Model Application No. 54-65784, Utility Model Application No. 59-21284). In addition, the present applicant has already proposed a detent at the time of extension to prevent the mutual engagement portions of the inner and outer straws from being accidentally disengaged when this kind of straw is extended and used. (Utility Model Application No. 58-74156, Utility Model Application No. 59-177372). A similar proposal is also described in Japanese Patent Application Laid-open No. 82813/1983. In both of these cases, when the double straw is in an extended state, after the end edge of the inner straw passes over a protrusion that is provided at a predetermined position on the inner surface of the outer straw and allows the rear end of the inner straw to get over. They are structured so that they engage with each other.

However, no device has been proposed for manufacturing such a detent. In addition, the special public official court Sho 52-384
As shown in Japanese Patent No. 73, a flexible drinking tube (straw) with a flexible portion consisting of a large number of circumferential grooves is manufactured by using thermoplastic material on a mandrel with a large number of concave and convex grooves. Although it is described that the process is carried out by covering a tube made of the material and rolling it on a block or plate having a large number of teeth, the publication does not disclose a manufacturing device, and furthermore, the flexible drinking liquid is The multiple circumferential grooves of the service pipe do not require positional accuracy in the longitudinal direction of the pipe.

[Problem that the invention seeks to solve]

In the case of the above-mentioned double straws with a detent when extended, when the inner straw is pulled out from the outer straw and the sloped ends of each end are engaged to make the extended state, the inner straw provided on the inner surface of the outer straw If there is a gap between the edge of the enlarged diameter part and the detent due to the position of the detent, the slopes of the end of each locking side will not be tightly locked between the inner and outer straws, resulting in a beverage puncture. When inserting the straw into a straw or while sucking a drink, problems occur such as the inner straw wobbling, and air leaking due to this, making it impossible to suck the drink smoothly.

On the other hand, if the detent is in a bad position and the enlarged diameter end cannot get over the detent, the detent will be insufficiently secured and will easily come off. The position of the detent must be accurately shaped and formed on the reduced diameter side of the outer straw, which is the engaging portion of the inner and outer straws.The present invention has been made in view of the above points. It is an object of the present invention to provide a device that can accurately form a detent of an inner straw with respect to an outer straw of this type of double straw.

[Means for solving problems]

In the present invention, as described above, the outer straw (11) of the double straw, which is configured so that the respective ends of the inner and outer straws on the overlapping side engage with each other in the extended state, is continuously conveyed. In order to process the outer straws, a large number of recesses/#(31,(3)
Facing the side of L-, each can move forward and backward and is concave? n
A detent molded rod (8) in which a single circumferential groove (6) and an outer straw diameter reduction side edge positioning portion (7) are integrally formed so as to move circumferentially in the same phase as f3). is rotatably provided, and a push guide (9) of the forming rod (8) is provided.
) is provided on the head side of the base frame, and the detent molding rod (8) is moved forward and backward, and the detent molding rod (8) is placed at a predetermined position as the detent molding rod (8) moves circumferentially.
A pair of detent moldings are provided with projecting edges (11) on the outer periphery so as to press the circumferential groove (6) formed in the mandrel (8a) from both sides when the metal core (8a) is in a protruding state. The rollers O and α are supported on the base frame α0, and the drum for J conveyance processing (
The outer straw of the detent forming rod (8) is transferred from the moving line (1) of the edge on the reduced diameter side of the outer straw (1) received and held in the concave groove (3) of 5) to the drum side. The molded rod (8
) straight ahead to remove the core part (8a) of the formed rod (8).
Cover the straw (11) and correct the position of the diameter-reducing end edge of the outer straw using the straw one end edge positioning part (7). Return the inner straw from the outer wall of the outer straw (1) to the inside of the straw (1) by rolling it between the outer straw (11) and the core (8a) while pressing the outer wall of the outer straw (11). Stop (
1a) is configured to form a protrusion.

[For production]

By doing so, the outer straw (1) has a single circumferential direction mf61 while being received and held in the groove (3) on the outer periphery of the conveying processing drum (5) and being conveyed. It is placed over the core metal part (8a) of the detent molded rod (8), and the stroke end edge positioning part (7) of the molded rod (8) is inserted.
), and while rolling in this state, both sides of the circumferential groove (6) of the core metal part (8a) of the non-retentive molded rod (8) Facing the ridge 01
A groove is formed on the outer periphery of the outer straw (1) by being pressed from both sides by a pair of detent forming rollers (2), a2) equipped with 1, and an inner straw detent (1a) protrudes from the inner wall surface of the groove. be done. In this case, the core metal part (8a
) and the outer straw diameter reduction side edge positioning part (7) are integrally formed, so that the outer straw whose end edge abuts against the positioning part (7) Straw-C1
), a detent (la) can always be formed at a predetermined position from the reduced diameter side end edge with accurate dimensions.

〔Example〕

An embodiment of the present invention will be described based on the accompanying drawings.

Figure 1 is a sectional view showing the main parts of the detent forming device.
The front part of the nn cross section in the side view of the outer straw conveyance processing drum equipped with the detent forming device shown in the figure is shown.

In the figure, (5) shows an outer straw conveyor for non-return forming processing in which a number of concave grooves (3) for receiving and holding outer straws (11) are provided on the outer periphery with the same pin, and the outer straw is conveyed. The processing drum is a processing drum, and in this embodiment, a cutter (22), which will be described later, is provided on the outer periphery so that it can be used when the production line is doubled in any double straw manufacturing apparatus. The receiver is formed in a symmetrical annular shape with the groove Q31 in between, and its outer peripheral wall αη
An internal gear (2) is provided around the inner surface of the central part of the drum, and its inner circumferential surface is supported by three rollers 09, and a drive gear (21) installed at the inner lower part of the drum rotates the drum counterclockwise. In addition, a suction box (25
) is bored so that the intake hole side for suctioning and fixing the outer straw (1) opens at the bottom of the groove (3).

Note that αa is a groove into which a guide (not shown) is inserted for transferring the outer straw (1) from this outer straw conveying processing drum. A disc-shaped cutter (22) is provided at the front center of the upper part of the outer straw conveyance processing drum (5) in a direction perpendicular to the drum surface. Two pieces of outer straw material (1') (6th (see figure)
Are you sure it's concave while cutting? 1If31 is maintained for cutting. The circumferential guide (24) is provided to hold the outer straw received in the groove (3) on the outer circumferential surface of the outer straw conveyance processing drum (5). Suction box (25) to be described later, sponge straw presser roller (29)
between the transfer drum O9 from the hopper and the transfer drum Q61 for carrying out the outer straw after detent forming from the outer straw conveyance processing drum (5) at a position other than the part where the straw is held. (See Fig. 1, Fig. 4(a), Fig. 4 tdl).

A lateral guiding guide (26) that guides the outer straw (11) to the side is cut by a cutter (22) along the upper surface of the drum (5) for conveying and processing the outer straw (Fig. 4 (al)
After the diameter-reduced end of the outer straw provided with the reference mark is displaced to the movement line (1) of the end, which is a predetermined position on the side of the drum, it is slidably brought into close contact with the inner surface of the outer peripheral wall OD of the drum. The outer straw (11) is conveyed to the outside position of the suction box (25) for suction and fixation provided in the suction box (25), and the concave groove (3)
The straw (1) is conveyed while being suctioned and fixed to the surface. On the other hand, on the outer side (left side in Fig. 1) of the straw conveyance processing drum (5) in parallel with the outer straw conveyance processing drum (5), a detent is formed on the outer straw fl+. A detent molded rod (8) equipped with a core part (8a) having a circumferential direction n (61),
The concave groove (31, +
31-..., the coil spring (
A detent molded rod holding drum (30) is provided on the inner circumferential surface of the holding drum (30), and is biased to retreat from the side surface of the groove by a detent molded rod holding drum (30) rotatably provided in the outer circumferential wall (30a). An internal gear (20°) is used to connect the outer straw conveyance processing drum (5) to the internal gear (20) via coaxial idle gears (27) and (27). It is installed to rotate in synchronization with the drum (5). The movement of the detent forming rod (8) relative to the side surface of the recess 4 (3) is controlled by a small-diameter guide roller (33) attached to the bearing portion (32) of the forming rod (8), which is fixed to the base frame aψ. The pushing-in guide is guided by a pushing-in guide (9) fixed to the outer peripheral surface of the holding cylinder (31).

In addition, the concave groove (3) of the drum (5) for conveying and processing the outer straw
The outer straw (11 is the side guidance guide (
26) so that its edge moves along a predetermined movement line (
After moving to 1), remove the suction box (25)
It is sucked and fixed in the concave groove (3) by the suction caused by the outer straw.
When the diameter-reducing side edge of the core metal part (
8a) is fitted into the outer straw (1) and the moving line (1)
), the outer straw diameter-reducing side end edge positioning portion (7) of the forming rod (8) enters into the drum side, and the outer straw ( 11 is pushed in. In this way, the outer straw (11) is placed over the core part (8a) of the detent molding rod (8), and the end edge of the outer straw (1) on the reduced diameter side (1b) is pushed to a predetermined position, the detent molding rod (8) becomes the most protruding state, and as it moves circumferentially, the circumferential groove (
A pair of non-retentive forming rollers (B), Q2) equipped with protrusions (11) on the outer periphery so as to press 6) from both upper and lower sides, Q2) are pivotally supported by the base frame 0ω, and the outer straw conveying processing drum ( 5) and the internal gears (20), (20″) of the detent forming rod holding drum (30) through the idle gears (27), (27) to the lower detent forming roller Q21 coaxial with the idle gear. is driven, and the opposing upper forming roller Oz has a pulley (36) that is coaxial with the roller beating and is connected by a belt (37) to a pulley (35) that is coaxial with the lower forming roller beating. It is driven at the same rotational speed as roller (2).

Further, the rotation of the detent forming rod (8) is performed by driving a rubber roller (34) provided coaxially with the mandrel (8a) on the opposite side of the mandrel (8a) of the molding rod. The rubber roller (34) is driven to make the outer circumferential speed of the outer straw (11), which is placed over the core metal part (8a) of the coaxial forming rod, approximately equal to the outer circumferential speed of the flange (11) of the detent forming roller. At the same time, the outer circumferential speed of the 0υ of the protrusion is controlled by the groove (3) on the outer circumference of the outer straw conveying processing drum (5).
) is made to be faster than the movement speed on the circumference.

That is, as shown in FIG. 3, the circumferential speed of the idle gear (27), which is close to the speed of circumferential movement of the groove (3), is increased by increasing the radius ratio (approximately twice as much in the figure) to increase the protrusion of the detent forming roller. In addition to increasing the circumferential speed of 1i (11), from the pulley (38) coaxial with the upper detent forming roller Miko,
Belt (44), small pulley (39).

Drives a pulley (42) coaxial with the heald (41) via a large pulley (40) coaxial with the small pulley (39), a belt (45), and a small pulley (41).
A rubber roller drive belt (46) is fully suspended between the roller drive belt (46) and a pulley (43) installed on the opposite side of the molding section, and the rotating lower surface of the belt (46) is stopped by a molding rod holding drum. (30) is brought into contact with the upper surface of a plurality of rubber rollers (34) that are pivotally supported on the circumference on the outer peripheral wall (30a), and the rubber rollers (34) are rotated at an increased speed to form a coaxial structure with the rubber roller (34). The outer circumferential speed of the outer straw that is placed over the core metal part (8a) of the rod is made substantially equal to the outer circumferential speed of the protrusion (11) of the detent forming roller. By doing this, the outer wall of the straw is prevented from breaking when the detent is formed on the inner surface of the outer wall of the outer straw, and the straw is moved circumferentially between the pair of forming rollers (2) and a75 at a predetermined position. The protruding edge (10) l and the circumferential groove (
6) The outer wall of the straw is recessed between the holes to form a detent on the inner wall of the straw. With respect to the outer straw with the detent molded in this way, the detent molding rod is then pressed by the push guide (9) while the outer periphery of the straw is pressed by the sponge straw pressing roller (29). (8) is released, and the mandrel (8a) of the forming rod (8) is inserted into the outer stroke.
After being pulled out from the straw (fl), the detent molded straw (fl) is conveyed to the next step by a transfer roller at;+.

Figure 4 (al to figure 4 tel are straw materials (1")
The process of forming the detent (la) with the outer straw (11) separated from the outer straw being held in the groove (3) on the outer peripheral surface of the drum (5) for conveying and processing the outer straw is shown below. In other words, as shown in FIG. The outward movement of the circle m is regulated by the diurnal guide (24), and the outer stroke (1
By being pushed and guided by the rear end of 1, the diameter-reducing side edge (
1b) moves to its predetermined movement line (tl), and after moving, as shown in FIG. As shown in Figure tel, the detent molding rod (8) is pushed against the outer straw (1) by the pushing guide (9), and then the detent molding rod (8) crosses the movement line (1). The outer straw diameter reducing side edge positioning portion (7) of the outer straw enters into the predetermined position relative to the protrusion α0 of the detent forming roller Q2+, that is, the circumferential groove of the core metal portion (8a) of the detent forming rod (8). (
6) until the outer stroke (
After 1) is pushed in, the outer straw (covered over the core part (8a) of the detent forming rod (8)) is inserted between the opposing detent forming rollers az and a21 as shown in FIG. 4Fdl. 1), the opposing projecting edges aυ, 0υ and the core part (8a
) and the circumferential groove (6) recesses its outer wall to form a detent (la). At this time, since the circumferential groove (6) of the core part (8a) of the detent molded rod and the outer straw diameter reduction side edge positioning part (7) are integrally formed, the positioning part (7) ), the detent (1a) can always be precisely dimensioned and precisely formed at a predetermined position from the diameter-reducing side end edge of the outer straw (1). Next, as shown in FIG. 4 (el), the outer straw (1) which has been formed is pressed by the sponge straw presser roller (29), and the push guide (9) releases the push. (The figure shows the pushing guide (9) in the middle of releasing the pushing.) Core part (8
a) is pulled out from the outer straw (11).

FIG. 6 is a diagram showing an example of the flow of a straw showing the relationship between the detent molding process and the manufacturing process of a double straw,
The case where the production line is doubled in an arbitrary double straw manufacturing apparatus will be shown.

Two pieces of outer straw material (l゛) are divided into two equal parts by a cutter, and the divided outer straw material is guided and conveyed to the outside of the conveyance line (downward in the figure), and during the conveyance, the circumference is A detent molded lower F in which a directional groove (6) and an outer straw diameter reduction side edge positioning portion (7) are integrally formed.
(8) is pushed in, and the diameter-reduced end edge (1b) of the outer straw is pushed in.
) rolls between a pair of opposing detent forming rollers Q21.0B with the position of the detent forming rod (8) being regulated by the outer straw diameter reduction side edge positioning portion (7), and then the core metal is removed. (8a) and the protrusion of the forming roller (121 aυ10υ
After the detent (la) is formed by this, the core part (8a) of the detent forming rod (8) is pulled out from the outer straw (11).

Next, when the outer straw (1) (with a detent) is conveyed diagonally on a screw conveyor, etc., and then conveyed straight on a bucket conveyor, two inner straw materials (2") are transferred.
The inner straw (2), which is diagonally canted on both end faces, is divided into two equal parts by a cutter, and the divided inner straw (2) is conveyed diagonally by a screw conveyor, etc., and the outer straw (11 and optionally The inner and outer straws (2) are inserted into the outer straw (1) by the inner and outer straw insertion means.The inner and outer straws, which have been inserted for a predetermined length and are in a combined state, are inserted into the outer straw molding mold (51) during transportation. ), inner straw mold (5
2), the engagement side end of the outer straw (1) is reduced in diameter,
The engagement side end of the inner straw is expanded in diameter. After that, push the inner straw (2) into the outer straw (1) using a guide, etc., pull out the inner straw 1-row (2) using a pinch roller, etc., and use any means to push the rear end of the outer straw (1). The diameter of the inner straw (2) is reduced slightly and the inner straw (2) is housed inside the outer straw (1) to complete the double straw with detent.In this case, both the inner and outer straws are referenced to the outer side, which is the end on the processing side. External stroke with precision
By fabricating the engagement-side reduced diameter part of the inner straw and the engagement-side enlarged diameter part of the inner straw, the detent of the double straw can be accurately produced by recessing the outer wall of the outer straw using the device of the present invention. By doing so, it is possible to produce a double straw that maintains a good locking condition when extended.

Fig. 7 is a side view of a double straw produced using the detent forming apparatus of the present invention in an extended state, and Fig. 8 is a sectional view of the double straw in its shortened state. If well prepared, a double straw can be obtained as shown in Figure 7.
can be properly locked in the extended state.

In this example, the explanation has been given for a production line with double lines, but it can also be applied to a production line with a single line.Also, it is possible to create only the detent forming device independently and produce two outer straws with detents. It may also be supplied to an outside straw hopper of a heavy straw production line.

In addition, in the embodiment, the detent molding processing section was installed facing the drum that cuts and conveys the outer straw connected to the outer straw material supply device (not shown), but this is not a limitation and it extends to the outer straw shrinking processing section. It is possible to install it on any of the outer straw conveying drums between the two.

In the above embodiment, when providing a protrusion on the inner surface of the outer straw that can be ridden over by the enlarged diameter portion of the inner straw as a detent for the double straw, a circumferential groove is formed on the outer periphery of the outer straw. An inner straw detent consisting of a continuous protrusion is formed on the inner wall of the straw,
Alternatively, the protruding edge of the detent forming roller may not be continuous, but may be provided partially in the circumferential direction to partially form one or more detents on the inner wall surface of the outer straw. .

〔Effect of the invention〕

As is clear from the above description, according to the present invention, while conveying the outer straw of the double straw in which the respective ends of the inner and outer straws on the overlapping side are engaged in the extended state, In order to process the outer straw continuously and with high precision, the outer straw is received in the concave groove of the drum for conveying and processing the outer straw.
By simply using a molded rod in which the molding groove and the outer straw diameter reduction side edge positioning portion are integrally formed, the double straw can be returned to a more accurate position than the diameter reduction side edge of the outer straw. This device is capable of efficiently and continuously forming highly accurate detents by protruding the retaining protrusion from the inner wall of the outer straw.This device can be used from the outer straw supply section of the double straw manufacturing device By installing it at an appropriate position between the end of the outer straw engaging side and reaching the reduced diameter part, or by using this device alone, the outer straw with a detent can be used in a double straw manufacturing line. As a result, it is possible to manufacture a high-quality double straw with a detent that is comfortable to use and does not cause air leakage when the straw is extended.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a cross-sectional view showing the main parts of the detent forming apparatus of the present invention, and shows a cross section taken along the line ■--■ in FIG. Fig. 2 is a side view of a drum for conveying and processing outer straws equipped with a detent forming device, Fig. 3 is a side view showing the main parts of the detent rolling section, Fig. 4 tel is a cross-sectional view of the main part showing the process of forming a detent while the outer stroke is held in the groove on the outer peripheral surface of the conveyance processing drum; Figure 4 fb) is a diagram showing the state when the outer straw is guided to a predetermined position. Figure 4 (d+ is a diagram when the outer straw is being molded at a predetermined molding position, and Figure 4 fel is a diagram when the molding process has been completed. Figure 5 is a partial enlarged view of the head of the forming rod; Figure 6 is a diagram showing the core part being pulled out from the outer straw;
A flowchart of the straw showing the relationship between the detent forming process and the manufacturing process of the double straw, and FIG. 7 is a side view showing the extended state of the double straw manufactured using the detent forming apparatus of the present invention. , FIG. 8 is a sectional view showing the straw in FIG. 7 in a shortened state. (11-one outside draw, (la)--detent, (l
b) - Outer draw diameter reduction side edge, (3) - Concave groove, (5
L-Outer straw-conveying processing drum, f6)-Circumferential groove, (7)... Outer straw diameter reduction side edge positioning part, (8
) - Detent molded rod, (8a) - Core metal part, (91
-Pushing guide, QOl-base frame, 0υ-projection, 0
Re-detent forming roller, 1tl--Movement line of the diameter-reducing side edge of the outer straw.

Claims (1)

[Scope of Claims] 1. Consisting of an outer straw and an inner straw inserted into and out of the outer straw, the outer straw is arranged so that the overlapping ends of the inner and outer straws are engaged when the inner and outer straws are stretched. A large number of concave grooves (3) are provided on the outer periphery to receive the outer straw (1) to produce a double straw in which the engagement side end is reduced in diameter and the engagement side end of the inner straw is enlarged in diameter. A single circumferential groove (6) and an outer straw diameter reduction side edge positioning portion (7) are provided on an outer straw conveyance processing drum (5) for detent forming processing that is adapted to convey the outer straw. The integrally formed detent molding rod (8) is attached to the conveying processing drum (
A push-in guide for the non-retentive molded rod (8) is provided so as to be freely rotatable so as to face each groove (3) on the side surface of the groove (5) and to move forward and backward freely and to move circumferentially in the same phase as the groove (3). 9) on the base frame (10) side, and a pair of detents having protrusions (11) on the outer periphery so as to press the circumferential groove (6) of the forming rod (8) from both sides at a predetermined position. The forming rollers (12), (12) are pivotally supported on the base frame (10), and the outer straw (12) is received and transferred to the groove (3).
1) Move the detent molding rod (8) so that the outer straw converging side edge positioning part (7) of the detent molding rod (8) enters beyond the moving line (t) of the convergent side end of the detent molding rod (8). The molded rod (8) is moved straight, and the outer straw (1) is placed over the core (8a) of the forming rod (8), and the end edge of the outer straw (1) on the reduced diameter side ( 1b) with the position corrected, a pair of detent forming rollers (12
), (12) and the core part (8a) of the detent forming rod to press and roll the outer wall part of the outer straw (1) to form a detent (1a) when the straw is extended. A double straw detent forming device featuring: 2. Making the outer circumferential speed of the outer straw (1) placed over the core metal part (8a) of the detent forming rod substantially equal to the outer circumferential speed of the ridge (11) of the detent forming roller (12), The outer peripheral speed of the projecting edge (11) is made greater than the circumferential movement speed of the groove (3) on the outer periphery of the outer straw conveying processing drum (5). A double straw detent forming device according to scope 1.