JPH02273780A - Engagement piece - Google Patents

Abstract

PURPOSE:To form no projection on a lateral rod part in cutting operation and to prevent a merchandise from being damaged by forming an end part of the lateral rod part connected orthogonally to a filament part so that the end part is curved toward a head part side. CONSTITUTION:The engagement piece is constituted of the head part 1, the filament part 2 which is connected orthogonally to the center part of the head part 1, and the lateral rod part 30 which is connected orthogonally to the other end of the filament part 2 and curved, and the end part of the lateral rod part 30 is curved approaching the head part 1, preferably, in an arcuate shape on the whole. The root part of a coupling part 4 implanted in the center part of the lateral rod part 30 moves toward a cutter while put closest to the cutter, and the coupling part is cut from the root part with the edge of the cutter. Consequently, no stump-shaped uncut part is formed at the coupling part 4 and the merchandise is not damaged.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a locking piece used mainly when attaching a price tag to a product or when grouping a plurality of products such as handkerchiefs and sock rings.

[Conventional technology]

The locking piece used mainly for attaching price tags to products and for other purposes is called a tag pin, and is injection molded using a linear polymeric material such as nylon or polypropylene, and has a filament part as described below. It is stretched and used for many purposes.

This locking piece has been proposed, for example, in Japanese Patent Publication No. 52-20240. As shown in FIG. 8, this locking piece p has a head 1, a filament part 2 connected with one end perpendicularly to the center of the head 1, and a filament part 2 connected perpendicularly to the other end of the filament part 2. It is made up of horizontal bar portions 3 connected together, and has an H-shape as a whole.

And a large number (usually about 50) configured in this way
A locking piece group P is formed by connecting the locking pieces p to the connecting rod 5 via the connecting portion 4.

This locking piece group P is loaded into an attaching machine A (tag attacher), and with a price tag inserted into a hollow needle provided at the tip of the attaching machine, the hollow needle is inserted into the product, and then the lever is is operated to advance the push-out rod, guide the horizontal bar portion 3 of one locking piece p through the hollow needle, and drive it into the product by making it protrude from the back side of the product. The horizontal bar portion 3 is restored to a T-shape orthogonal to the filament portion 2 on the back side of the product, and a price tag is attached to the product.

In the manufacturing process of this locking piece, the original shape P of the locking piece group P is
' is formed and fed to a drawing machine M as shown in Fig. 9.
The horizontal bar 3 is supported by the fixed support part 8 of this stretching machine M, and the head 1 is supported by the movable support part 9 that moves away from the fixed support part 8, so that the head 1 side is supported. Horizontal bar part 3
The filament portion 2 is stretched at a predetermined magnification by moving the filament portion 2 toward the side to reduce the diameter of the filament portion 2 and make it thread-like, increasing its strength and giving it flexibility.

The fixed support part 8 in a general drawing machine M is made of two metal plates 8
A and 8b are rail-shaped members facing each other with a slit 8c in between, and the horizontal bar portion 3 of the locking piece group P is supported on these metal plates 8a and 8b, and the filament portion 2 is passed through the slit 8c. This is what I did.

Therefore, the horizontal bar portion 3 is supported at both ends by the metal plates 8a and 8b, and is pulled through the filament portion 2 at its central portion. Due to this behavior during stretching, the horizontal bar 3 becomes folded from the middle as shown in Fig. 10, and the horizontal bar 3 becomes an "expanded ■-shape" or a "gently curved F-shape". ”.

Note that the original shape P of the locking piece group is
' is heated (preheated) to a predetermined stretching temperature, and in particular,
The filament portion 2 is in a state where it is most easily stretched near the horizontal bar portion 3. The stretching starts near the horizontal bar portion 3 and extends to the head 1 side so that an unstretched portion remains near the head 1.

Next, the behavior when the locking piece p is driven into the product by the attaching machine will be explained.

FIG. 11 shows a state in which a locking piece p having a linear horizontal bar portion 3 is driven in, and the connecting rod 5 supporting the locking piece group P is inserted into the guide hole 10 of the mounting machine A, and the horizontal The rod portion 3 is located at the entrance of the guide hole 11 provided at the rear of the hollow needle, and the end of the horizontal rod portion 3 is pushed in the direction of the arrow by a push rod 12 operated by a lever, and the hollow needle is pushed out as shown by the arrow. Move forward inside.

In this case, the filament part 2 connected to the horizontal bar part 3
The needle passes through the slit provided on the side of the hollow needle and projects from the tip of the hollow needle to the back of the product.

A blade 13a of a cutter 13 is provided toward the opening connecting portion 4 side connected to the guide hole 10, and the connecting portion 4 is cut as the horizontal bar portion 3 moves forward, but normally this blade 13a cannot accurately cut down to the root part R of the connecting part 4 connected to the horizontal bar part 2, and the root part R of the connecting part 4 is slightly protruding from the horizontal bar part 2 (stump-like).
It will remain.

In particular, when the horizontal bar portion 3 is deformed into an enlarged ■-shape or F-shape due to the action of the force of the stretching process as shown in FIG. 12, the center of the horizontal bar portion 3 and the blade 13a are Since a considerable distance is formed between them, said root R will protrude by a considerable length.

If the root portion R of the connecting portion 4 remains protruding from the center of the horizontal bar portion 3 as described above, the cut remaining portion will naturally catch the fibers of the product and damage the product. It turns out.

2, when the cutter 13 is provided at the entrance of the guide hole 11 at the rear of the hollow needle and the connecting part 4 is cut as the horizontal bar part 3 moves forward, the accuracy of the mounting machine A is Regardless of the situation, uncut portions will inevitably occur, and this will damage the product.

The present invention solves the problems of the conventional locking piece group, and aims to provide a locking piece group in which the root portion of the connecting portion does not remain in the center of the horizontal bar as much as possible. That is.

Another purpose is to ensure that the filament part is short (for locking pieces in which both the head and the horizontal bar are shaped like rods, it is possible to securely hold the product with both the head and the horizontal bar). The purpose is to provide a piece.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a head, a filament portion whose one end is connected perpendicularly to the center of the head, and the other end of the filament portion. The locking piece is formed by a horizontal bar connected perpendicularly to the head, and the end of the horizontal bar is bent so as to approach the head side.

That is, the locking piece according to the present invention is characterized in that the horizontal bar portion is deformed in a direction opposite to that shown in FIG. 10 or 12.

[For production]

Since both ends of the horizontal bar are bent so as to approach the head, the root of the connecting part planted in the center of the horizontal bar is closest to the cutter and faces the cutter. The cutter blade is used to cut from this base, so that no uncut portion of the stump-like connecting portion is formed and no damage is caused to the product.

〔Example〕

The present invention will be explained below with reference to the drawings.

FIG. 1 is a side view of a locking piece group according to the present invention, in which the locking piece P includes a head 1, a filament part 2 connected orthogonally to the center of the head 1, and a filament It is connected perpendicularly to the other end of the section 2 and is composed of a bent horizontal bar section 30. The locking pieces p configured in this manner are planted in a comb shape on the connecting rod 5 via the connecting portion 4 to form a locking piece group P.

The locking piece p according to the present invention is characterized in that the end of the horizontal bar portion 30 is preferably bent into an arch shape as a whole so as to approach the head 1. A method for manufacturing the stopper p will be explained.

The group of locking pieces of the present invention is manufactured using the all-in-mold stretching method, that is, the head and the horizontal bar are formed in separate molds, and the connection is made between the head and the horizontal bar by relatively moving the two. The filament part that has been drawn is drawn.

FIG. 2 is a sectional view showing the main parts of the mold, including molds 31a and 31b for molding the connecting rod 5, the connecting part 4, the horizontal bar part 30, and a part of the filament part 2, and The remaining parts and the four parts of the molds 32a and 32b forming the head 1 are the main parts. The horizontal bar portion 30 is provided with protruding pins 33a, 33b, 33c, and 33d on the side surface of the head 1, and the locking pieces are injected in the mold as if supported by the protruding pins. It is molded. Each member constituting the mold is driven by a pneumatic cylinder device.

[Molding process]

FIG. 2 shows the state in which the original shape P' of the locking piece group P has been molded. Note that in this figure, illustration of a portion of the spool portion and runner, which are passages for injecting the molten resin, is omitted.

[Stretching process]

FIG. 3 shows the drawing process of the filament part 2, in which the molds 31a and 31b are fixed and the mold 32a is drawn.

32b is moved in the direction of arrow A to stretch the filament portion 2. This stretching starts near the horizontal bar portion 30 and gradually progresses toward the head 1 side.

In order to specify the stretching direction as described above, the thickness of the filament part 2 is made thinner on the side of the horizontal bar part 30 and thicker on the side of the head l, so that the tensile force per unit area during stretching is adjusted. Can be defined automatically.

As mentioned above, the time required for the filament portion 2 to be stretched at a predetermined magnification required for molecular orientation specific to linear synthetic resins such as nylon and polypropylene is extremely short. Therefore, the filament portion 2 during stretching is in a viscoelastic state, and "elastic energy" is stored inside it, just like a stretched rubber string.

Therefore, if the locking piece group P is released from the mold immediately after the filament portion 2 is drawn at high speed, the locking piece group P will be ejected from the mold with force due to the elastic energy.

[Step of extracting the horizontal bar portion] Next, as shown in FIG. 4, the mold 31a is raised in the direction of arrow B while pressing down the protruding pin 33a to expose the half 30a of the horizontal bar portion 30.

In this case, the head 1 is supported by the molds 32c and 32d. However, in this step, the protruding pin 33c
If half of the head 1 is exposed by raising the mold 32a side in the direction of arrow C while protruding, the molds 31a and 32
a moves upward at the same time, and the molding cycle can also be shortened.

[Bending process of horizontal bar part]

Next, as shown in FIG. 5, the protruding pin 33a is moved back in the direction of arrow E to free the upper half 30a of the horizontal bar portion 30. As mentioned above, elastic energy is retained in the filament portion 2 immediately after stretching, and tension is thereby applied to the filament portion 2, so that the horizontal bar portion 30 is
It will be bent using b as the fulcrum.

The protruding pin 33b is maintained for a period of time in an elevated state to such an extent that the horizontal bar portion 30b does not come out from the mold 31b, and then the mold 31b approaches the molds 32a and 32b as shown by arrow F. After removing the tension in the filament part 2, operate the mold and the protruding pin to remove the locking piece group P from the mold.
Take out.

The operating method of the mold and the ejecting pin is merely an example; in the actual process, the equipment used to manufacture the locking piece group, the size of the locking piece group, the manufacturing speed, and the molding speed will vary. It can be changed freely depending on the materials used.

In short, in the method of stretching the filament part 2 using a mold, immediately after stretching the filament part 2, the tension (elastic energy) built in the filament part 2 is used to deform the horizontal bar part 30. Giving is important.

FIGS. 6(a) and 6(b) show examples of the deformed state of the horizontal bar portion 30, and in FIG. The projecting pin 33b is shown raised in several steps, and the horizontal bar portion 30 is bent at several locations.

In this case, if the protruding pin 33b is raised one after another in a stepless manner, half of the horizontal bar portion 30 will be bent into a curved shape.

FIG. 6(c) shows the shape of the horizontal bar portion 30 when the protruding pin 33b is raised only once.

When extracting the lower half of the horizontal bar portion 30 from the mold 31b as described above, the protruding pin 33a provided on the mold 31a side
It is also possible to increase the deformation of the half 30b of the horizontal bar by lightly supporting the end of the half 30a of the horizontal bar 30 to prevent the locking piece group P from protruding from the mold. It is.

[Another transformation method]

In the method for manufacturing the locking piece group, when a normal all-in-mold stretching method is adopted, the horizontal bar portion 2 can be bent depending on the timing of opening the mold and the timing of operating the protruding pin.

However, similar bending can be performed using other methods.

That is, by raising the protruding pin 33a from the state shown in FIG. 4 and applying a pressing member as indicated by arrow G, the upper half 30a of the horizontal bar portion 30 is bent into a U-shape relative to the lower half 30b. is possible.

FIG. 7 shows a locking piece group P in which the filament part 2 is stretched, placed on the concave molding surface 41 of the mold 40, and the root part of the filament part 2 is pressed by the pressing member 41 to expand the horizontal bar part 30. This shows the process of bending it into a V shape.

The process of bending the horizontal bar part 30 as shown in 2 is the process of bending the filament part 2.
It can also be employed in the stretching process. Furthermore, it is possible to use pinch rollers instead of the mold 40 and the pressing member 41 to bend the horizontal bar portion 30 into a predetermined shape.

FIG. 13 shows a state in which the locking piece p according to the present invention is loaded into the attachment machine A, and the piston 12 presses the end of the horizontal bar part 30 to send it into the hole of the hollow needle. Since the end of the horizontal bar 30 is bent toward the head side, the center portion of the horizontal bar 30, that is, the root portion R of the connecting portion 4 is bent toward the blade 13 of the cutter 13.
closest to a. Therefore, when the horizontal bar portion 30 moves forward through the hollow needle, it is cut off from the root portion R of the connecting portion 4, and the root portion R of the connecting portion 4 does not remain in the shape of a stock.

〔Effect of the invention〕

The locking piece according to the present invention consists of a head, a filament part connected at one end perpendicular to the center of the head, and a horizontal bar part connected perpendicularly to the other end of the filament part. ,
A feature is that the end of this horizontal bar is bent so as to approach the head side.

Therefore, when loading the locking piece into the mounting machine and driving it in, the root of the connecting part passes closest to the cutter blade and is cut, causing a protrusion on the horizontal bar. without causing any damage to the product.

In addition, in the case of a locking piece with a short filament part, the bent horizontal bar part will hold down the product, so this horizontal bar part will act as a kind of spring, making it possible to effectively bundle the products. .

[Brief explanation of drawings]

FIG. 1 is a front view of a locking piece group according to the present invention, FIGS. 2 to 5 are explanatory views of the manufacturing process of the locking piece group, and FIG. 6(a)
, (b) is a diagram showing the shape of the horizontal bar portion of the locking piece according to the present invention, and FIG. 7 is a diagram showing a method for mechanically bending the horizontal bar portion. FIG. 8 is a front view of a conventional locking piece group, FIGS. 9 and 10 are explanatory views of the manufacturing process of the conventional locking piece group, and FIGS. 11 and 12 are views of the conventional locking piece group. It is an explanatory view of the state when it is driven in by a mounting machine. FIG. 13 is an explanatory diagram of a state in which the locking piece according to the present invention is driven in by a mounting machine. 1... Head 3... Horizontal bar part 5... Connecting rods 8a, 8b... Metal plate 10... Guide hole 12... Piston 13a... Blade p... Locking piece M...Stretching machine A...Mounting machine. 2...Filament part 4...Connecting part 8...Fixed support part 9...Movable support part 11...Guide hole 13...Cutter 30...Horizontal bar part P...Locking Piece group R... root part

Claims (1)

[Claims] It consists of a head, a filament part with one end connected perpendicular to the center of the head, and a horizontal bar part connected perpendicularly to the other end of the filament part, and the end of the horizontal bar is is a locking piece that is bent so as to approach the head side.