JPH0987916A - Safety device of snap fastener attaching machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safety device for a snap fastener attaching machine capable of attaching the snap fastener at accurate position by anyone. SOLUTION: The first operating force-transmitting mechanism A is provided between a pedal and a driving tool 4 and the driving tool is constituted so as to lower from the highest end P1 of a lifting and lowering stroke H to an intermediate position P2 setting an interval between the driving tool and a receiving pedestal 3 to the size incapable of inserting the finger of the hand by stepping the pedal and an idle part C constituted so as not to insert one revolution clutch therein until the driving tool is lowered to the intermediate position P2 is provided in the second operating force transmission mechanism B for transmitting the operation force from the pedal to operating piece 14 of the one revolution clutch 7 and an eccentric cam 9 is provided in the output shaft 8 of one revolution clutch and a cam follower 13 is provided in the first operating force-transmitting mechanism A and the eccentric cam presses the cam follower and the driving tool is driven to the lowest end P3 of lifting and lowering stroke only when the driving tool exists in the intermediate possition P2 .

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention supports one member of a male or female fitting member and a rivet member on a seat, and the other member is driven up and down with respect to the seat. With a flexible sheet that is the target of snap fastener installation, such as cloth for clothing or the opening edge of a plastic bag for packaging, interposed between the seat and the driving tool. And a safety device for a snap fastener mounting machine, wherein the rivet member and the fitting member are caulked to each other by vertically moving the driving tool through a one-rotation clutch that is operated by a pedal. .

[0002]

2. Description of the Related Art In the above snap fastener mounting machine, since the one-turn clutch is operated by the foot, both hands can be used freely, and the flexible sheet can be operated by depressing the pedal with both hands in a tensioned state. On the other hand, there is an advantage that a good snap fastener mounting state without wrinkles can be obtained on the flexible sheet, but since one rotation clutch is operated by the foot, some safety device must be added to take care of others. If the foot placed on the pedal is pressed due to an unforeseen event, such as when the pedal is pressed at the wrong timing, or when people around the vehicle accidentally collide with the operator, the fingers and the seat There is a risk that it will be caught in and cause a serious accident.
Therefore, various safety devices have been conventionally developed and put into practical use.

One of them is to provide a finger-sensing frame body around the driving tool, which is moved up and down in advance of the driving tool by depressing a pedal, and the finger-sensing frame body descends and comes into contact with a finger. In this case, the lowering of the finger sensing frame is blocked by the fingers,
Since the pedal cannot be depressed any further, the safety device is configured so that the one-rotation clutch cannot be engaged and operated.

This safety device is very excellent in safety performance, but since the finger sensing frame is located around the driving tool, the flexible sheet is placed between the seat and the driving tool with both hands. When inserted, the finger-sensing frame becomes an obstacle both visually and physically, making it difficult to attach the snap fastener in the correct position, and it requires a considerable amount of skill to perform accurate attachment work. There was a point.

[0005]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems in the conventional safety device and allows anyone to attach the snap fastener at an accurate position, which is easy to use. It provides a safety device for the machine.

[0006]

The technical means taken by the present invention to achieve the above object are as follows.
That is, the feature of the present invention is, in the snap fastener attaching machine described at the beginning, by stepping on the pedal, the driving tool is manually lowered to an appropriate position,
When the operator's finger is inserted between the driving tool and the receiving seat, the finger is sandwiched between the driving tool and the receiving seat, and further,
Since the driving tool cannot be lowered, if the one-turn clutch is not operated and the operator's finger is not inserted between the driving tool and the seat, the driving tool further descends to a predetermined position,
Since the one-rotation clutch is operated, the driving tool is moved up and down through the one-rotation clutch to the lower end of the elevating stroke, the rivet member and the fitting member are caulked, and the power is turned off. After that, even if the one-turn clutch is kept in the operated state because the pedal was depressed, the next time the power is turned on, the one-turn clutch will rotate and the output The point is that it is configured not to be transmitted to the driving tool.

More specifically, a feature of the present invention is that, of male and female fitting members and rivet members,
One member is supported by the receiving seat, the other member is supported by a driving tool which is driven up and down with respect to the receiving seat, and a flexible sheet is interposed between the receiving seat and the driving tool, In the snap fastener attaching machine, wherein the rivet member and the fitting member are caulked to each other by vertically moving the driving tool through a one-rotation clutch that is operated by a pedal, First between the driving tool
When the pedal is depressed by providing the operating force transmission mechanism, the driving tool cannot insert the operator's finger from the uppermost end in the elevating stroke of the driving tool when the distance between the driving tool and the receiving seat is large. While being configured to descend to an intermediate position set to a size, in the middle of the second operation force transmission mechanism that transmits the operation force from the pedal to the one-turn clutch,
An eccentric cam is provided on the output shaft of the one-rotation clutch, and a play portion is provided to prevent the operating force of the pedal from being transmitted to the one-rotation clutch until the pedal is depressed to lower the intermediate position. The first operating force transmission mechanism is provided with a cam follower driven by the eccentric cam only when the driving tool is at the intermediate position, and only when the driving tool is at the intermediate position. The eccentric cam presses the cam follow so that the driving tool is driven up and down from the intermediate position to the lower end of the lifting stroke.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a snap fastener attaching machine provided with a safety device, and FIGS. 2 to 7 show details of the safety device.

In FIG. 1, reference numeral 1 is a stand, and a frame 2 which doubles as a drive case is continuously provided on the stand. The front side of the frame 2 is divided into an upper frame 2a and a lower frame 2b so as to form a working space S that is open to the front and left and right sides. The lower frame 2b is provided with a seat 3 and The frame 2a is provided with a driving tool 4 which can be raised and lowered with respect to the seat 3. Then, as shown in FIG. 2, a male (or female) fitting member a which is a snap fastener constituent member is supported by the driving tool 4, and a rivet member b which is another snap fastener constituent member. Is supported by the receiving seat 3, and a flexible sheet c such as cloth for clothes is interposed between the fitting member a and the rivet member b, and the driving tool 4 moves the lifting stroke H (P ₁
By lowered to the lowermost end P ₃ of to P _3), caulking the fitting member a and the rivet member b is to be carried out. Reference numeral 5 is a tubular elevating guide which holds an elevating rod 6 continuously provided on the upper part of the driving tool 4 so as to be vertically slidable. M is a motor that drives the driving tool 4 up and down via a one-rotation clutch 7. Reference numeral 8 denotes an output shaft of the one-rotation clutch 7, to which an eccentric cam 9 is fixed. At the bottom of the stand 1, a pedal 10 for operating the one-turn clutch 7 is provided. 11 is pedal 1
Reference numeral 0 is a return spring and reference numeral 12 is a spring for urging the driving tool 4 upward to the uppermost end P ₁ of the lifting stroke H.

A first operating force transmission mechanism A is provided between the pedal 10 and the driving tool 4, and when the pedal 10 is stepped on, the driving tool 4 is moved. From the uppermost end P ₁ in the elevating stroke H to the intermediate position P ₂ where the distance between the driving tool 4 and the seat 3 is set to a size (for example, several millimeters) where the operator's fingers cannot be inserted. Configured. In the first operating force transmission mechanism A, only when the driving tool 4 is at the intermediate position P ₂ ,
A roller-shaped cam follower 13 is provided which is pressed by the eccentric cam 9.

A second operation force transmission mechanism B for transmitting an operation force from the pedal 10 to the operation piece 14 of the one-turn clutch 7 is provided between the pedal 10 and the operation piece 14 of the one-turn clutch 7. It is provided. In the middle of the second operation force transmission mechanism B, the one-rotation clutch 7 is not operated by the operation force of the pedal 10 until the pedal 10 is depressed so that the driving tool 4 descends to the intermediate position P _2. A play portion C is provided for this purpose. When the driving tool 4 is lowered to the intermediate position P ₂ , the one-rotation clutch 7 is engaged and operated, and the driving tool 4 is moved by the eccentric cam. 9 and the cam follower 13 which has moved into the rotation locus thereof, it descends to the lowermost end P ₃ in the elevating stroke H, and the fitting member a and the rivet member b.
The caulking is done.

The specific construction of the first operating force transmission mechanism A is as follows. That is, 15 is an arm rotatably supported by the frame 2 via a horizontal shaft 16. One end of the arm 15 and the upper end of the elevating rod 6 are pivotally connected by a link 17 and pins 18 and 19. Has been done. 20
Is a horizontal shaft rotatably supported by the frame 2, and a rotary link 21 is attached to one end of the horizontal shaft 20 so as to rotate together with the horizontal shaft 20.
The rotary link 21 and the arm 15 include a link 23 pivotally supported by a pin 22 in the vicinity of the other end of the arm 15 and a pin 25 slidably inserted into a long hole 24 formed in the link 23 within a certain range. It is interlockingly connected through. 26
Is a link pivotally supported on the frame 2 via a horizontal axis 27. The link 26 and the rotary link 21 are pivotally connected by a rod 28, and the link 26 and the pedal 10 are connected.
And are pivotally connected by a rod 29.

These members 15 to 29 constitute the first operating force transmission mechanism A. When the pedal 10 is stepped on, the rods 29 and 28 are pulled downward, and the rotary link 21 is moved to the horizontal axis 20 axis. Since the arm 15 is rotated in the direction opposite to the hour hand around the core in FIG.
As it rotates around and pushes down the elevating rod 6 via the link 17, the driving tool 4 descends to the intermediate position P ₂ .

The specific construction of the second operating force transmission mechanism B is as follows. That is, the link 30 is attached to the other end of the horizontal shaft 20 so as to be rotatable integrally with the horizontal shaft 20. The link 30 and
The operation piece 14, which is swingably supported by the frame 2 via a support shaft 31, includes a rod 31 whose length is adjustable by a screw mechanism, and an elongated hole 32 formed in the rod 31.
And a pin 33 projecting from the tip of the link 30 and slidably inserted into the elongated hole 32, are interlockingly connected.

These members 20, 30, 31, 32, 3
The second operating force transmission mechanism B is composed of 3 and the like, and the long hole 3
The play portion C described above is configured by 2 and the pin 33. Then, by depressing the pedal 10 so that the driving tool 4 descends to the intermediate position P ₂ , the link 3
Since the pin 33 at the tip of 0 pushes up the upper end of the long hole 32 and the rod 31 rotates the operating piece 14 around the support shaft 34, the engagement between the claw 14a of the operating piece 14 and the step portion 7a of the one-turn clutch 7 is prevented. When it is disengaged, the one-rotation clutch 7 is engaged, and the output shaft makes one rotation, so that the step portion 7 a causes the claw 1 of the operation piece 14 to move.
4a is engaged and the one-turn clutch 7 is disengaged. 35a and 35b shown in FIG. 3 are stoppers.

According to the above configuration, as shown in FIG.
A male (or female) fitting member a, which is a snap fastener constituent member, is supported by the driving tool 4, and a rivet member b, which is another snap fastener constituent member, is supported by the seat 3. When the pedal 10 is stepped on with a flexible sheet c such as cloth for clothing interposed between the fitting member a and the rivet member b, the first operating force transmission mechanism A is generated by the operating force. Through, the driving tool 4 descends from the uppermost end P ₁ of the lifting stroke H to the intermediate position P ₂ .

When the driving tool 4 descends to the intermediate position P ₂ ,
Since the play portion C of the second operation force transmission mechanism B is eliminated and the pin 33 at the tip of the link 30 pushes up the upper end of the elongated hole 32, the one-rotation clutch 7 is engaged, and the driving tool 4 is moved up and down by the output of the motor M. The intermediate position P ₂ of the stroke H is lowered to the lowermost end P ₃ , and the fitting member a and the rivet member b are caulked. That is, the sharp protrusion of the rivet member b penetrates the flexible sheet c and is inserted into the central through hole of the fitting member a, and the protruding tip of the protrusion is struck by a hammer mounted in the center of the driving tool 4. The diameter is expanded and deformed to engage with the edge of the central through hole of the fitting member a.

In this case, if a finger is inserted between the driving tool 4 and the receiving seat 3, the pedal 10 is inadvertently depressed,
Even if the driving tool 4 is lowered, the fingers are sandwiched between the driving tool 4 and the receiving seat 3 and the driving tool 4 cannot be lowered to the intermediate position P _2, so that the one-rotation clutch 7 is not engaged.

When the pedal 10 is stepped on after the snap fastener mounting work is completed and the power is turned off, the engagement between the claw 14a of the operation piece 14 and the step portion 7a of the one-turn clutch 7 is released. As a result, the one-rotation clutch 7 is turned on and operated, and the output shaft of the one-rotation clutch 7 may make one revolution when the power is turned on during the next snap fastener installation work. Tool 4
Is at the uppermost end P ₁ of the lifting stroke H by the urging force of the spring 12, the pedal 10 is also in the raised position by the urging force of the return spring 11, and the cam follower 13 at the tip of the arm 15 is out of the rotational trajectory of the eccentric cam 9. Therefore, even if the eccentric cam 9 is rotated, the operation is performed by the cam follower 13
Therefore, the driving tool 4 does not descend.

Therefore, it is possible to ensure safety, and moreover, since the driving tool 4 itself serves to detect the presence of the fingers, another finger sensing frame is not arranged around the driving tool 4. When the flexible sheet is inserted between the seat 3 and the driving tool 4, there is no obstacle visually or physically, and anyone can easily attach the snap fastener to the correct position. .

[0021]

According to the present invention, not only can safety be ensured, but since there is no visual or physical obstacle around the driving tool, anyone can easily position the snap fastener accurately. There is an effect that can be attached to.

[Brief description of 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 structural explanatory view of a safety device of the snap fastener attaching machine.

FIG. 4 is an operation explanatory view of the safety device of the snap fastener attaching machine.

FIG. 5 is an operation explanatory view of the safety device of the snap fastener attaching machine.

FIG. 6 is an operation explanatory view of the safety device of the snap fastener attaching machine.

FIG. 7 is an operation explanatory view of the safety device of the snap fastener attaching machine.

[Explanation of symbols]

A ... first operating force transmitting mechanism, B ... second operating force transmitting mechanism, C ... play part, H ... ascending and descending stroke, P ₂ ... intermediate position, 3 ... seat, 4 ... Dakomigu, 8 ... one Output shaft of rotary clutch, 9 ... eccentric cam, 13 ... cam follower.

Claims (2)

[Claims] 1. A male or female fitting member and a rivet member, one of which is supported by a receiving seat, and the other of which is supported by a driving tool which is driven up and down with respect to the receiving seat. In the state where the flexible sheet is interposed between the seat and the driving tool, the driving tool is lifted and lowered via a one-rotation clutch operated by a pedal, whereby the rivet member and the In a snap fastener attaching machine in which a fitting member and a fitting member are caulked to each other, by stepping on the pedal, the driving tool is manually lowered to an appropriate position, and work is performed between the driving tool and a seat. If the person's finger is inserted, the finger is pinched by the driving tool and the seat, and the driving tool cannot be lowered any further.Therefore, the one-turn clutch is not operated and the driving tool is not operated. If the operator's finger is not inserted between the seat and Since the driving tool further descends to a predetermined position and the one-rotation clutch is engaged and operated, the driving tool is driven up and down to the lower end of the lifting stroke through the one-rotation clutch, and the rivet member and the fitting member are moved. When the power is turned on next time, even if the one-turn clutch is kept in the operated state because the pedal is depressed after turning off the power, A safety device for a foot-operated snap fastener mounting machine that is configured so that the output of the one-rotation clutch does not reach the driving tool when the clutch only rotates. 2. One of a male-type or female-type fitting member and a rivet member is supported by a receiving seat, and the other member is supported by a driving tool which is driven up and down with respect to the receiving seat. In the state where the flexible sheet is interposed between the seat and the driving tool, the driving tool is lifted and lowered via a one-rotation clutch operated by a pedal, whereby the rivet member and the In a foot-operated snap fastener attaching machine in which a fitting member is crimped to each other, a first operating force transmission mechanism is provided between the pedal and the driving tool, and the pedal is depressed to depress the pedal. While the hammer is configured to descend from the uppermost end in the lifting stroke of the hammer to an intermediate position in which the distance between the hammer and the seat is set to a size where the operator's finger cannot be inserted, From the pedal to a one-turn clutch In the middle of the second operation force transmission mechanism for transmitting the operation force, the operation force of the pedal is prevented from being transmitted to the one-rotation clutch until the pedal is depressed so that the driving tool descends to the intermediate position. An eccentric cam is provided on the output shaft of the one-rotation clutch, and the first operating force transmission mechanism is driven by the eccentric cam only when the driving tool is at the intermediate position. With a cam follower, only when the driving tool is in the intermediate position,
The eccentric cam presses the cam follower, and the driving tool is configured to be vertically driven from the intermediate position to the lowermost end of the lifting stroke. .