JPH10226913A - Machine for attaching snap fastener - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a snap fastener-attaching machine enabling to prevent the loss of a snap pin and easily and safely perform a work for attaching the snap fastener, when a member for holding a snap-fitting member is exchanged. SOLUTION: In this snap fastener-attaching machine, a holding member 13 is attached to an attaching member 12 with a snap pin 17 engaged to the circular groove 16 of the holding member 13 through a slit 15 formed on both the sides of the cylindrical attaching member 12. Therein, the snap pin 17 comprises a bent wire rod portion 17a placed along the front surface of the attaching member 12, the first wire rod portions 17b connected from both their ends to the back portions and engaged with the circular groove 16 through the slit 15, the second wire rod portions 17c connected from the rear ends to the back portion and disposed at a space larger than the inner diameter of a site for inserting the holding member 13 of the attaching member 12 and smaller than the outer diameter of the site, and a curved wire rod portion 17d connected to the rear ends of the second wire rod portions 17c and used for stopping the slip-off of the snap pin. Thereby, the holding member 13 can be attached or detached by longitudinally slipping the snap pin without pulling out the snap pin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hammer for hitting a projection of a rivet on an elevating member driven up and down with respect to a base, and slidable vertically with respect to the hammer and the elevating member. A driving device including a cylindrical mounting member urged downward by a spring and a cylindrical holding member connected to the lower end of the mounting member so as to be able to be inserted and removed is provided. A rivet seat is provided immediately below the apparatus, and the holding member holds the snap fitting body and the rivet body is placed on the seat, and a flexible sheet is interposed between the seat and the driving device. In this state, by driving the driving device up and down, the protrusion of the rivet body inserted into the central through hole of the snap fitting body through the flexible sheet is hit with the hammer, and the protrusion tip is enlarged. By form about snap fasteners attached machine so as to caulking in the center through-hole of the snap-fitting portion.

[0002]

2. Description of the Related Art In a snap fastener mounting machine of this type, the shape of a male and female snap fitting body is determined when a female snap fitting body is mounted on a flexible sheet and when a male snap fitting body is mounted on the flexible sheet. It is necessary to replace with a holding member corresponding to. Further, even if the same female type or male type is used, when a snap fitting having a different size is to be attached, it is necessary to replace the snap fitting with a holding member suitable for the size.

For this reason, conventionally, as shown in FIG. 8 which is a cross-sectional plan view of a main part of a snap fastener mounting machine, slits 15 are formed on both side surfaces of the mounting member 12 so as to be opened with a phase of 180 degrees. An annular groove 16 is formed on the outer peripheral surface of the holding member 13 so as to face the slits 15, 15, while a snap pin 70 having a shape as shown in FIG.
Is engaged with the annular groove 16 so that the holding member 1
The fixing member 3 is fixed to the mounting member 12, and the snap pin 70 is pulled out forward, whereby the holding member 13 is removed and replaced with a holding member having a different shape and size. 10 in the figure is a hammer.

[0004]

However, the above-mentioned prior art has the following drawbacks. When the attachment / detachment of the holding member 13 is performed, the snap pins 7
0, it is necessary to remove the snap pin 70
Easy to lose. In a state where the holding member 13 is fixed to the mounting member 12, a ring-shaped knob portion 70a formed at the front end of the snap pin 70 protrudes remarkably forward of the mounting member 12, and in this state during the snap fastener mounting operation, Since the mounting member 12 and the holding member 13 move up and down, the knob portion 70a becomes a visual obstruction, so that not only the snap fitting body held at the tip of the holding member 13 is difficult to see, but also the lowering knob portion. There is a possibility that a finger is hit at 70a, and there was a problem in terms of safety.

[0005] The present invention is an improvement on this point, and it is possible to prevent the snap pin from being lost when the holding member is detached and replaced, and to prevent the snap pin from being obstructed at the time of attaching the snap fastener. An object of the present invention is to make it possible to easily and safely attach a snap fastener to a flexible sheet.

[0006]

In order to achieve the above object, according to the present invention, a hammer for hitting a projection of a rivet body on an elevating member driven up and down with respect to a base, the hammer and the elevating member A driving device comprising: a tubular mounting member slidable in a vertical direction with respect to the main body and urged downward by a spring; and a cylindrical holding member connected to a lower end portion of the mounting member so as to be able to be inserted and withdrawn. On the other hand, the base is provided with a rivet seat at a position directly below the driving device, and the holding member holds a snap fitting body and the rivet body is placed on the seat.
With a flexible sheet interposed between the seat and the driving device,
By driving the driving device up and down, the projection of the rivet body inserted into the central through hole of the snap fitting body through the flexible sheet is hit with the hammer, and the tip end of the projection is deformed to expand the center of the snap fitting body. In a snap fastener mounting machine that is caulked to a through hole, a slit is formed on both sides of the mounting member so as to have a phase of 180 degrees and is opened, and an annular surface facing the slit is formed on an outer peripheral surface of the holding member. While forming a groove, a pair of bent curved material portions located along the front surface of the mounting member, and a pair of bent bent portions provided rearward from both left and right ends thereof and configured to engage with the annular groove through the slit. The first wire portion and the rear portion of the first wire portion are connected rearward from the rear end of the first wire portion, and are wider than an inner diameter of a portion where the holding member of the attachment member is inserted and are larger than an outer diameter of the portion. And a snap pin comprising a pair of second wire portions located at a small interval and a wire portion for retaining, which is bent inward from the rear end of the second wire portion and inwardly provided. When the snap pin is slid backward, the first wire portion is engaged with the annular groove through the slit, and when the snap pin is slid forward, the second wire portion is located in the slit. At the same time, the engagement between the first wire portion and the annular groove is released so that the holding member can be removed.

According to the above configuration, the first of the snap pins is
With the wire portion engaged with the annular groove of the holding member through the slit of the mounting member, in a state where the holding member is fixed to the mounting member, the second wire portion and the retaining wire portion protrude behind the mounting member. However, in front of the mounting member, only a part of the snap pin is located along the front surface of the mounting member, and there is no notable protruding portion corresponding to the knob portion of the conventional snap pin. At the time of the mounting operation, the snap pins do not become an obstacle, and there is no possibility of hitting a finger with the descending snap pins.

[0008] Further, when attaching and detaching and replacing the holding member,
By putting a finger on a wire portion for retaining which protrudes to the rear of the mounting member and pushing the wire portion forward, the snap pin slides forward with respect to the mounting member, and the first wire portion and the annular groove are formed. Is disengaged. In this state, since the two wire portions having a large interval are located in the slit, the holding member can be inserted and removed, and yet the retaining member is provided at the rear end of the second wire portion so as to be bent continuously. Since the wire portion is engaged with the back surface of the mounting member, further sliding forward is prevented, so that the snap pin is prevented from falling off. In other words, the attachment / detachment of the holding member can be performed only by sliding back and forth without removing the snap pin. Therefore, the attachment / detachment / replacement of the holding member is very easy, and the loss of the snap pin when attaching / detaching the replacement of the holding member can be prevented.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a snap fastener attaching machine, and FIGS. 2 and 3 show a main part thereof.

In FIG. 1, reference numeral 1 denotes a stand, on which a base 2 serving also as a drive case is continuously provided. The front side of the base 2 is divided into an upper frame 2a and a lower frame 2b so as to form a work space S opened forward and to the left and right sides.

An elevating member 4 driven up and down by a driving mechanism (not shown) is slidably held in a vertical direction on a cylindrical guide 3 provided on the upper frame 2a. A driving device A is provided. The lower frame 2 b of the base 2 is provided with a rivet seat B at a position directly below the driving device A.

As shown in FIG. 2, the receiving seat B has a metal case 5, a receiving member 6 having a concavely curved supporting surface 6a formed on the upper end for supporting the head of the rivet body, and the receiving member. A cylindrical guide 8 having a circular cross section; a spring 9 having a lower spring force than the compression spring 7 for urging the cylindrical guide 8 to slide upward. The metal case 5 is dropped into a hole formed in the lower frame 2b of the base 2 from above until the flange portion 5a of the metal case 5 contacts the upper surface of the hole edge.

As shown in FIG. 2, the driving device A has a hammer 10 for striking a projection of a rivet body, and is slidable vertically with respect to the hammer 10 and the elevating member 4 and downward by a spring 11. A biased cylindrical mounting member 12, and a cylindrical holding member 13 connected to a lower end of the mounting member 12 so as to be able to be inserted and removed,
The holding member 13 is configured to be able to hold a female snap fit.

Then, as shown in FIG. 2, the female snap fitting member a which is a snap fastener constituting member is held by the holding member 13, and the rivet body b which is another snap fastener constituting member is received by the receiving member. Let the seat B support
When the pedal 14 in FIG. 1 is depressed in a state where a flexible sheet c such as clothing cloth is interposed between the snap fitting body a and the rivet body b, the one-turn clutch is driven by a driving mechanism (not shown). The lifting member 4 is driven up and down via the driving device A
Descends, the projection of the rivet body b inserted into the central through hole of the snap fitting body a through the flexible sheet c is hit with the hammer 10, and the tip end of the projection is expanded and deformed so that the snap fitting body a The central through-hole is caulked.

In this embodiment, in the above-mentioned snap fastener attaching machine, the holding member 13 is attached to the attaching member 1.
It is characterized in that the structure for detachable replacement with respect to 2 is configured as follows. That is, as shown in FIG. 3, slits 15, 15 are formed on both sides of the mounting member 12 so as to have a phase of 180 degrees and open inward and outward, and the slits 15, 15 are formed on the outer peripheral surface of the holding member 13. An annular groove 16 is formed at a position opposite to the above. Reference numeral 17 denotes a snap pin for fixing the holding member 13 to the mounting member 12 by engaging the annular groove 16 through a slit.

The snap pin 17 is formed by bending a single steel wire, and as shown in FIG. 4, a semicircular (or substantially U-shaped) located along the front surface of the mounting member 12. ) And a pair of first wire portions 17b, 17b, which are bent and connected rearward from both left and right ends thereof and are configured to engage with the annular groove 16 through the slits 15, 15. And an inner diameter of a portion of the mounting member 12 where the holding member 13 is inserted, which is provided rearward from the rear ends of the first wire portions 17b, 17b (this is the mounting member 12).
Substantially matches the outer diameter of the holding member 13 to be inserted into the holding member 13. ), And the distance L is smaller than the outer diameter of the part.
_A pair of second wire portions 17c, 1 located apart from each other
7c, and a retaining wire portion 17 which is bent inward at a substantially right angle from the rear end of each of the second wire portions 17c, 17c.
d and 17d.

When the snap pin 17 is slid backward with respect to the mounting member 12, the first
When the wire portions 17b, 17b are engaged with the annular groove 16 through the slits 15, 15 and the snap pin 17 is slid forward as shown in FIGS. 5 and 6, the second wire portions 17c, 17c Are slits 15,15
And the engagement between the first wire portions 17b, 17b and the annular groove 16 is released so that the holding member can be removed. In the free state, the first wire portions 17b, 17b are bent as shown in FIG.
Are progressively narrows such tapered spacing increasing distance from the first wire portion 17b, the interval L ₂ of the narrowest portion between 17b has an outer diameter (annular groove of the holding member 13 in the bottom of the annular groove 16 16 is set to be slightly smaller than the distance between the bottom surfaces of the slits 16, which is substantially equal to the distance between the slits 15 and 15.

According to the above configuration, the first wire portions 17b, 17b of the snap pins 17 are engaged with the annular grooves 16 of the holding member 13 through the slits 15, 15 of the mounting member 12, whereby the holding member 13 is mounted. In the state of being fixed to the member 12, the second wire portions 17 c, 17 c and the wire portions 17 d, 17 d for retaining protrude behind the attachment member 12. Only a part (semicircular or substantially U-shaped bent curve portion 17 a) is located along the front surface of the mounting member 12. In other words, there is no noticeable protrusion corresponding to the conventional snap pin knob. Therefore, at the time of the snap fastener attaching operation, the snap pin 17 does not obstruct the visual, and there is no possibility of hitting the finger with the descending snap pin 17.

When the attachment / detachment of the holding member 13 is performed, a finger is put on the retaining wire portions 17d, 17d projecting rearward of the mounting member 12, and the wire portion 17
By pushing d and 17d forward, the snap pin 17 is slid forward with respect to the mounting member 12, and the engagement between the first wire portions 17b and 17b and the annular groove 16 is released.

[0020] In this state, as shown in FIGS. 5 and 6, two large wire portion 17c spaced L _1, since 17c is positioned in the slit 15, 15, can be inserted and removed in the holding member 13 Yes, but the second wire portion 17
The retaining wire portions 17b, 17b, which are bent and provided at the rear ends of the snap members 17c, 17c, engage with the back surface of the mounting member 12 to prevent further forward sliding. Is prevented from falling off. In other words, without pulling out the snap pin 17, just slide it back and forth,
The holding member 13 can be detached and replaced. Therefore,
The attachment / detachment / replacement of the holding member 13 is very easy, and
This can prevent the snap pin 17 from being lost when the holding member 13 is detached and replaced.

In the embodiment shown in FIGS. 1 to 6, the holding member 13 is for holding the female snap fitting body a. However, as shown in FIG. 7, the male snap fitting is used. Regarding the holding member 13 ′ for holding the united a ′,
Since only the shape of the tip is different, it is natural that the snap pin 17 can be attached and detached and replaced by sliding the snap pin 17 back and forth. Reference numeral 18 in the drawing denotes a split ring-shaped spring.

[0022]

As described above, according to the present invention, it is possible to prevent the snap pin from being lost when the holding member is detached and replaced.
In addition, there is an effect that the snap pin does not hinder the work of attaching the snap fastener, and the work of attaching the snap fastener to the flexible sheet can be performed easily and safely.

[Brief description of the drawings]

FIG. 1 is an overall side view of a snap fastener attaching machine.

FIG. 2 is a vertical sectional side view of a main part.

FIG. 3 is a cross-sectional plan view of a main part.

FIG. 4 is a plan view of a snap pin.

FIG. 5 is a vertical sectional side view of a main part of the driving device with the holding member removed.

FIG. 6 is a vertical sectional side view of a main part of a holding member for a male snap fitting body.

FIG. 7 is a cross-sectional plan view of a main part in a state where the snap pin is slid forward.

FIG. 8 is an explanatory diagram of a conventional example.

[Explanation of symbols]

A: hammering device, 12: mounting member, 13: holding member,
Reference numeral 15: slit, 17: snap pin, 17a: bent line portion, 17b: first wire portion, 17c: second wire portion, 17d: wire portion for retaining.

Claims (1)

[Claims] 1. A hammer for hitting a projection of a rivet body on an elevating member driven up and down with respect to a base, and a slidable up and down direction against the hammer and the elevating member and biased downward by a spring. While providing a driving device having a cylindrical mounting member and a cylindrical holding member connected to the lower end of the mounting member so as to be able to be inserted and removed,
The base is provided with a seat for a rivet at a position directly below the driving device, and the holding member holds a snap fitting body and places the rivet on the seat, and between the seat and the driving device. By driving the driving device up and down with the flexible sheet interposed, the protrusion of the rivet body inserted into the central through hole of the snap fitting through the flexible sheet is hit with the hammer, and the protrusion tip In the snap fastener attaching machine in which the diameter of the snap fastener is increased by caulking in the center through hole of the snap fitting body, slits are formed on both side surfaces of the attaching member so as to have a 180 degree phase and are opened. An annular groove facing the slit is formed on the outer peripheral surface of the member, and a bent curved material portion located along the front surface of the mounting member, and a bent bent portion is provided from both left and right ends to the rear. A pair of first wire portions configured to be engaged with the annular groove through the slits, and a portion of the portion where the holding member of the mounting member is inserted rearward from the rear end of the first wire portion and is inserted. A pair of second members located at an interval wider than the inner diameter and smaller than the outer diameter of the portion
In a state where a snap pin composed of a wire portion and a wire portion portion for retaining which is bent inward from the rear end of the second wire portion is provided, and the snap pin is slid backward with respect to the mounting member, In a state in which the first wire portion is engaged with the annular groove through the slit and the snap pin is slid forward, the second wire portion is located in the slit and the first wire portion and the annular groove are in contact with each other. A snap fastener mounting machine characterized in that engagement is released and the holding member can be removed.