JP2592699Y2 - Snap fastener mounting machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a snap fastener attaching machine for attaching a male snap or a female snap of a snap fastener comprising a combination of a male snap and a female snap to a flexible film such as clothing. The two members that are the components of the male snap and the female snap, that is, a rivet member and a male or female fitting member having a through hole formed at the center for inserting the projection of the rivet member, By arranging on both sides of the flexible membrane, piercing the projection of the rivet member into the flexible membrane and inserting it into the through hole of the fitting member, and hitting the tip of the projection to expand and deform the diameter. The present invention also relates to a snap fastener mounting machine configured to caulk the rivet member and the fitting member with a flexible film interposed therebetween.

[0002]

2. Description of the Related Art A receiving tool for supporting a rivet member such that a projection is directed upward, a vertically movable driving tool disposed above the receiving tool, and a driving means for driving the driving tool vertically, A pusher for supplying a rivet member to the tool and a fitting member formed with a through hole for inserting a projection of the rivet member in the center of the tool, and the tool is a vertically movable tool. A main body, a cylindrical shaft-shaped guide punch slidable up and down with respect to the driving tool main body, and urged downward by the urging means; and disposed inside the guide punch and fixed to the driving tool main body. A caulking punch, and by lowering the driving tool in a state where a flexible film is interposed between the receiving tool and the driving tool, the fitting member is pushed down by the guide punch, and a rivet portion is formed. Of the projection is inserted into the through-hole of the fitting member, and the tip of the projection is hit with the caulking punch to connect the rivet member and the fitting member to the flexible membrane. A snap fastener attaching machine which is adapted to be caulked in a state of sandwiching is already known.

According to the snap fastener mounting machine having the above-described configuration, the fitting member and the rivet member are supplied to the driving tool and the receiving tool by the pusher, and the flexible film is inserted between the two. When the driving tool is driven down by the lifting drive means over a predetermined range, first, the guide punch presses down the fitting member and presses the fitting member from above the flexible film body against the projection of the rivet member. It penetrates the flexible membrane and is inserted into the through hole of the fitting member.

When an overload is applied to the guide punch due to the pressing of the fitting member, the guide punch is slid relatively upward, that is, the caulking punch is further stopped while the guide punch is stopped from descending. The caulking punch descends, hits the tip of the projection protruding from the through hole of the fitting member, and expands and deforms the diameter, so that the fitting member and the rivet member are caulked in a state where the flexible film body is sandwiched. Will be.

However, in the conventional snap fastener mounting machine, the driving tool and the lifting drive are substantially directly connected to each other, and the lower limit position of the lifting stroke of the caulking punch is constant. Was.

That is, since the cylindrical shaft-shaped guide punch on the outer periphery of the caulking punch is configured to be slidable up and down with respect to the driving tool body and urged downward by the urging means, the flexible film body is provided. Can be slid up and down according to the thickness of the flexible film body, and when the thickness of the flexible film body is small, the guide punch pushes down the fitting member to a lower position, so that the rivet member protruding from the through hole of the fitting member. When the protrusion length of the projection is long and the thickness of the flexible film body is large, when the fitting member is lowered by a required amount, the guide punch escapes upward against the urging means, and the rivet member The protrusion length of the projection from the through hole is reduced. On the other hand, the caulking punch always descends to the lower limit position of the elevating stroke irrespective of the thickness of the flexible film, hits the projection of the rivet member and crushes the projection.

Therefore, if the lower limit position of the lifting stroke of the caulking punch is set high in accordance with the thickness of the thick flexible film body, when the thin flexible film body is to be mounted, the rivet member is set with the caulking punch. Even if the projection is hit, only the top of the projection protruding longer than the through-hole of the fitting member is expanded and deformed, and the crimping is incomplete. Conversely, if the lower limit position of the lifting stroke of the caulking punch is set low in accordance with the thin flexible film body, when the thick flexible film body is to be attached, it protrudes from the through hole. In spite of the short length of the protrusion, the swaging punch descends more than necessary and hits the protrusion of the rivet member. An excessive force is applied, and the fitting member is broken.

In order to avoid such inconvenience, in the conventional snap fastener mounting machine, when the thickness of the flexible film body changes, the caulking punch fixed to the driving tool body is replaced with a different length punch. Therefore, it was necessary to reset the lower limit position of the lifting stroke of the swaging punch.

In particular, when the flexible film to which the snap fastener is to be attached is clothing, the thickness of the snap fastener attachment portion of the clothing is usually one or two or more even for one piece of clothing. Because it is different at each part, such as the part that has been folded three times, it is necessary to attach all the snap fasteners uniformly and in good condition with one snap fastener attaching machine,
There is a problem that many troublesome punch replacements are required, and the work efficiency is deteriorated.

[0010] For this reason, for one piece of clothes, the places where the thickness of the fabric is almost the same are grouped into one group, and the places where the snap fasteners are attached are divided into a plurality of groups.
The length of the caulking punch was set according to the fabric thickness of each group, that is, a plurality of snap fastener attachment machines with different lower limit positions of the guide punch elevating stroke were prepared, and clothes were attached to these snap fasteners. In some cases, it is necessary to carry around the snap fastener by carrying it around the mounting machine, but in this case, a plurality of snap fastener mounting machines and a large installation space for the snap fastener are required. There was a problem that the installation cost was high.

[0011]

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and has as its object to reduce the time required to exchange a caulking punch in accordance with the thickness of a flexible film. Another object of the present invention is to make it possible to attach a snap fastener to flexible membranes having different thicknesses by one snap fastener attaching machine without performing such a troublesome operation.

[0012]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a receiving device for supporting a rivet member such that a projection is directed upward, and a lifting and lowering device disposed above and facing the receiving device. A free driving tool, a driving tool for raising and lowering the driving tool, a rivet member to the receiving tool, and a fitting member having a through hole formed in the center of the driving tool for inserting a projection of the rivet member are supplied. A driving tool body, the driving tool body being vertically movable, a cylindrical shaft-shaped guide punch slidable up and down with respect to the driving tool body, and urged downward by urging means; A caulking punch arranged inside the punch and fixed to the driving tool main body, wherein the driving tool is lowered with a flexible film interposed between the receiving tool and the driving tool. ,Previous The fitting member is pushed down by the guide punch, the projection of the rivet member is pierced into the flexible film body and inserted into the through hole of the fitting member, and the tip of the projection is hit with the caulking punch, and the rivet member is pressed. And a snap fastener mounting machine configured to caulk the fitting member with the flexible film body therebetween, wherein the driving tool is configured to be vertically slidable with respect to the lifting / lowering driving means, It is characterized by being biased downward by means.

[0013]

According to the above construction, since the guide punch is slidable up and down with respect to the driving tool main body and urged downward by the urging means, the flexible film body to which the snap fastener is attached is provided. Load acting on the guide punch depending on the thickness of the guide punch (resistance to lowering of the guide punch)
Changes, the lower limit position of the elevating stroke of the guide punch changes, and the protrusion length of the protrusion of the rivet member protruding from the through hole of the fitting member changes.

The protruding portion protruding from the through hole of the fitting member is hit with an inner caulking punch descending integrally with the driving tool main body and is deformed in diameter, but the protruding portion protruding from the through hole of the fitting member is long. The smaller the protrusion, the smaller the protruding portion protruding from the through hole is, the less the constrained by the hole wall of the through hole. Since it is hard to be deformed and deformed, a large force is required to crush the projection by the caulking punch. In other words, when the thickness of the flexible film body is large and the protrusion protruding from the through hole is short, the load acting on the swaging punch (resistance to the downward movement of the swaging punch) when the protrusion is crushed increases.

Since the driving tool is configured to be vertically slidable with respect to the lifting drive means and urged downward by the urging means, when the load acting on the swaging punch when the projection is crushed increases, In spite of the fact that the lifting drive means applies a downward driving force to the driving tool main body, the driving tool main body, and hence the caulking punch, is relatively opposed to the lifting drive means against the biasing force of the biasing means. The lower end position of the lifting stroke of the caulking punch is automatically raised.

As a result, regardless of the thickness of the flexible membrane,
At any time, only the protruding portion protruding from the through hole is crushed by the caulking punch.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show the entirety of the snap fastener attaching machine, and FIGS. 3 to 6 show the main parts of the snap fastener attaching machine. In these figures, reference numeral 1 denotes a hopper that stores a large number of male (or female) fitting members A, and reference numeral 2 denotes a hopper that stores a large number of rivet members B. These hoppers 1 and 2 are provided on the upper side of the self-supporting frame 3 so as to face each other in the left-right direction. S is a flexible film such as clothing to be attached.

The fitting member A and the rivet member B
Are made of synthetic resin, and the rivet member B is composed of a disk-shaped head a and a sharp projection b protruding from the center of the back surface. The fitting member A has a male (or female) fitting portion c for performing a snap action, and a through hole d for inserting the projection b is formed at the center thereof.

Reference numerals 4 and 5 denote chutes for taking out the fitting member A and the rivet member B, which are arranged in a fixed posture as the hoppers 1 and 2 rotate. A feed groove e of the fitting member A is formed in the front end portion of the upper chute 4 in the front-rear direction.
A guide rail 6 having a feed groove f for the rivet member B is provided in the front-rear direction at the tip of the lower chute 5.

In front of the feed grooves e and f, a driving tool 7 which can be raised and lowered and a receiving tool 8 which supports the rivet member B so that the projection b faces upward are provided so as to face each other up and down. ing. 9 is a drive means for raising and lowering the driving tool 7;
The upper and lower two-stage arms 10a and 10b supply the fitting member A to the driving tool 7 and the rivet member B to the receiving tool 8, respectively.
And is reciprocated in the front-rear direction in synchronization with the elevation of the driving tool 7. And
When the pusher 10 moves backward, the fitting members A and the rivet members B in the chutes 4 and 5 are supplied one by one to the delivery grooves e and f, and the pusher 10 moves forward. Thereby, the fitting member A
And the rivet member B move in the delivery grooves e and f, and drive the tool 7 and the receiving tool 8 from the ends of the delivery grooves e and f, respectively.
It is to be sent to. 11 is pusher 1
0 drive mechanism.

The receiving member 8 includes a receiving base 12 fixed to the frame 3 and a pair of openable and closable holding fittings 13a for holding the head a of the rivet member B placed on the receiving base 12 from both sides. , 13b and a spring 14 for urging the holding members 13a, 13b in the closing direction. Holding bracket 1
The lower ends of 3a and 13b are connected to a movable frame 15 which moves in the vertical direction in synchronization with the elevation of the driving tool 7 by a drive system (not shown). The upper ends of the holding fittings 13a and 13b are opened against the spring 14 while being lowered with respect to the cradle 12 as the movable frame 15 is lowered.

The driving tool 7 has a driving tool main body 17 that can be moved up and down along a guide member 16, and a lower end of the driving tool main body 17 that is vertically slidable within a certain range with respect to the driving tool main body 17. And a cylindrical shaft-shaped guide punch 19 urged downward by urging means 18 comprising a coil spring, and a caulking punch 20 disposed inside the guide punch 19 and fixed to the driving tool body 17.
A pair of openable and closable holding metal members 21a and 21b provided on the front surface of the driving tool body 17 so as to be vertically movable with respect to the driving tool body 17, and a spring 22 for urging the holding metal members 21a and 21b in the closing direction. And the driving tool body 17
A connecting rod 23 having a rectangular opening g is swingably connected to an upper end of the connecting rod 23 via a support shaft 24 in the front-rear direction. Reference numeral 25 denotes a retaining pin of the guide punch 19, and reference numeral 26 denotes a set screw of the caulking punch 20. Caulking punch 2
A substantially conical dent is formed at the center of the lower end surface (striking surface) of the rivet member B. When the caulking punch 20 descends, the tip of the projection b of the rivet member B fits into the dent and is positioned. In this state, the protrusion b by the caulking punch 20
Is crushed.

The lifting drive means 9 has a pin hole 2 at the center.
A slide block 28 provided with a groove 7 is slidably provided in the opening g in the vertical direction, and a crank pin 31 provided on a rotating shaft 30 that is rotationally driven by a single-rotation clutch (not shown) by the output of a motor 29. , And is rotatably inserted into the pin hole 27 of the slide block 28. Reference numeral 32 denotes a pedal for connecting and operating the one-turn clutch.

The driving tool 7 is configured to be vertically slidable with respect to the lifting / lowering driving means 9 within a gap L between the opening g and the slide block 28. Biasing means 3 having a greater biasing force than
3 downwardly biased.

As shown in FIGS. 3, 5 and 6, the urging means 33 forms a hole 34 in the upper part of the connecting rod 23 and a screw hole 35 concentric with the hole 34. 28, the small-diameter screw portion h on the lower side of the stepped screw member 36 is screwed into the screw hole 35 through the hole 34, and the small-diameter screw portion h is stopped by the rotation stopper pin 37. Further, a plurality of disc springs 38 having different vertical directions are fitted over the screw member 36, and a nut 40 for pressing the disc spring is screwed to the upper end of the screw member 36 via a washer 39. It is configured as follows.

The urging means 33 and the like are covered by a cover (see FIG. 2) 41. Further, in order to prevent the horizontal movement of the disc spring 38 facing the small-diameter screw portion h, the cylindrical body 42 is fitted over the disc spring 38 in a predetermined range on the lower side, but the disc spring 38 is a coil spring or the like. Can be changed to When a coil spring is used instead of the disc spring 38, the above-described cylindrical body 42 can be omitted.

Next, the operation of the snap fastener mounting machine having the above configuration will be described. As shown in FIGS. 4 and 7, when the pedal 32 is depressed in a state where the flexible film body S is interposed between the receiving tool 8 and the driving tool 7, the driving tool 7 descends, and FIG. As shown in (a), the holding metal fittings 21a and 21b are opened at an appropriate timing, and
Pushes down the fitting member A and presses the rivet member B from above the flexible film body S, so that the protrusion b of the rivet member B pierces the flexible film body S and the penetration of the fitting member A Hole d
Is inserted into.

In this case, since the guide punch 19 is configured to be slidable vertically with respect to the driving tool main body 17 and is urged downward by the urging means 18, the thickness of the flexible film S is reduced. Accordingly, the load acting on the guide punch 19 (resistance to the downward movement of the guide punch 19) changes, so that the lower limit position of the vertical stroke of the guide punch 19 changes, and the rivet member protruding from the through hole d of the fitting member A. The projection length of the projection b of B changes.
For example, as shown in FIG.
In the case of a single sheet, since the fitting member A is pushed down to a lower position, the length of the protruding portion protruding from the through hole d is long. However, as shown in FIG. When a snap fastener is attached to a portion where the body S is superimposed, the guide punch 19 escapes upward against the urging means 18, so that the length of the protrusion protruding from the through hole d is reduced.

Thereafter, as the driving tool body 17 is lowered, the swaging punch 20 further lowers, and as shown in FIG. 8B, the tip of the projection b is hit by the swaging punch 20 to expand and deform. Then, the fitting member A and the rivet member B are caulked with the flexible film S interposed therebetween.

In this case, the swaging punch 20 descends integrally with the driving tool main body 17, but the driving tool 7 is configured to be vertically slidable with respect to the elevation driving means 9 within the gap L. Further, since the urging means 33 is urged downward by the urging means 33, the swaging punch 20 relatively moves upward in accordance with a load acting on the swaging punch 20 when the projection b is crushed (resistance to the downward movement of the swaging punch 20). It slides, and the lower limit position of the vertical stroke of the swaging punch 20 changes.

Therefore, regardless of the thickness of the flexible film body S,
Only the protruding portion protruding from the through-hole d is always crushed by the caulking punch 20, so that it is possible to prevent cracking of the fitting member A and occurrence of poor caulking.

That is, the caulking punch 20 is attached to the rivet member B
When the tip of the protrusion b is hit, the through hole d of the fitting member A
The longer the protruding portion protruding from the through hole d is, the less the restraint by the hole wall of the through hole d is. Therefore, the crimping punch 20 crushes the protrusion b (diameter expansion deformation) with a light force, and if the protruding portion protruding from the through hole d is short. Since the periphery is restricted by the hole wall of the through hole d and is hardly deformed, a large force is required to crush the projection 3 by the caulking punch 20, but depending on the load acting on the caulking punch 20 when the projection b is crushed. Since the lower limit position of the lifting stroke of the caulking punch 20 changes, for example, as shown in FIG.
Even if there is only one, as shown in (b) of FIG. 9, even when three flexible film bodies S are stacked, only the protruding portion protruding from the through hole d is always formed by the caulking punch 20. If the flexible film S is crushed and the thickness of the flexible film body S changes, it is not necessary to replace the caulking punch 20 with one having a different length.

[0033]

[Effects of the Invention] As described above, according to the present invention,
Even if the projection length of the rivet member projecting from the through hole of the fitting member changes according to the thickness of the flexible membrane, only the projecting portion projecting from the through hole can be crushed by the caulking punch. Therefore, it is possible to prevent the fitting member from cracking or crimping. Therefore, the snap fastener can be attached to the flexible membranes having different thicknesses without using a time-consuming and troublesome operation such as replacing the swaging punch according to the thickness of the flexible membrane. It is possible to do it on a machine.

[Brief description of the drawings]

FIG. 1 is a front view of a snap fastener attaching machine.

FIG. 2 is a side view of the snap fastener attaching machine.

FIG. 3 is an exploded perspective view of a main part.

FIG. 4 is a side view of a main part, partly broken away.

FIG. 5 is a front view of a main part, partly broken away.

FIG. 6 is a side view of a main part, partly broken away.

FIG. 7 is an explanatory diagram of an operation.

FIG. 8 is an explanatory diagram of an operation.

FIG. 9 is an explanatory diagram of an operation.

[Explanation of symbols]

7: driving tool, 8: receiving tool, 9: lifting / lowering driving means, 10:
Pusher, 17: driving tool body, 18: biasing means, 1
9: guide punch, 20: caulking punch, 33: urging means, A: fitting member, B: rivet member, S: flexible membrane, b: protrusion, d: through hole.

Claims (1)

(57) [Scope of request for utility model registration] 1. A receiving tool for supporting a rivet member such that a projection is directed upward, a vertically movable driving tool disposed above the receiving tool so as to face the receiving tool, a driving device for vertically moving the driving tool, and the receiving tool. A pusher for supplying a rivet member to the tool and a fitting member formed with a through hole for inserting a projection of the rivet member in the center of the tool, and the tool is a vertically movable tool. A main body, a cylindrical shaft-shaped guide punch slidable up and down with respect to the driving tool main body, and urged downward by the urging means; and disposed inside the guide punch and fixed to the driving tool main body. A caulking punch is provided, and by lowering the driving tool with the flexible film interposed between the receiving tool and the driving tool, the fitting member is pushed down by the guide punch, and the rivet member is lowered. The projection is pierced into the flexible film body and inserted into the through hole of the fitting member, and the tip of the projection is hit with the caulking punch, so that the rivet member and the fitting member sandwich the flexible film body. In a snap fastener mounting machine adapted to be caulked in an inflated state, the driving tool is configured to be vertically slidable with respect to the lifting drive means, and biased downward by biasing means. Mounting machine.