JPH0133008Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Field of industrial application) The present invention relates to a button lifting mechanism for a button sewing machine that can be used in a lockstitch button sewing machine and a single chainstitch button sewing machine.

(Prior Art) Various conventional lockstitch and single chain stitch button sewing machines have been proposed, but in particular, the button lifting mechanism of lockstitch button sewing machines has
The button lifting rod needs to be positioned on the back of the fabric on the needle plate when the stitches are in the stitch state, and the button lifting rod needs to retreat from the back of the fabric at the end of one cycle. It was necessary to drive the button lifting rod during one cycle. However, the conventional mechanism has a function of receiving signals and driving the button lifting rod, so it has many components and requires timing adjustment of the driving part. The adjustment was complex and difficult.

(Problems to be solved by the invention) The present invention solves problems such as the conventional button sewing machine with a button floater having many components and the need for timing adjustment. By linking the release of the buttons, the present invention aims to provide a button lifting mechanism that is easily applicable to automated and unmanned sewing machines.

[Structure of the idea]

(Means for Solving the Problems) Therefore, the present invention has been proposed for a button sewing machine in which the left and right button clamps are opened and closed by the back and forth movement of the button clamp mounting plate to hold and release the button. a button floating link arranged so as to be movable back and forth and biased so that its tip is always pressed against the rear end of the button clamp mounting plate; and a central portion rotatably pivoted to the sewing machine feed stand at one end. a button float lever to which the rear end of the button float link is pivotally attached; and a button float lever which is disposed on the sewing machine feed stand so as to be movable back and forth and whose tip crosses the needle drop hole, and whose rear end is connected to the button float lever. and a button lifting rod pivotally connected to the other end, and in conjunction with opening of the button by the back and forth movement of the button clamp mounting plate, the button lifting rod is moved back via the button lifting link and the button lifting lever. This is done in such a way that it is used as a means to solve problems.

(Function) Now, hang the button at the needle drop point above the fabric on the feed plate, and pinch the button from the left and right with the button clamps. In this state, there is a button floating rod on the underside of the fabric on the feed table, and the tip of the rod extends over the needle hole. After sewing is completed, the button lifting rod moves backward through the button lifting link and the button lifting lever in conjunction with the release of the button by the back and forth movement of the button clamp mounting plate, and comes out of the thread that has formed the seam, separating the sewn product from the button lifting rod. break away.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings. Fig. 1 is a plan view of a button lifting mechanism showing an embodiment of the present invention, and Fig. 2 is a side view of the same. In the figure, reference numeral 1 denotes a feed base, on which a button clamping device stand 6 is mounted, and a button clamping mounting base 38 having button clamping and button release functions is attached to the tip of the device stand 6. There is. Button clamp mounting plate 19 on the lower side of button clamp mounting base 38
The tip of the button lifting link 5 is in contact with the end face of the link 5, and the link 5 engages with the set screw 4 of the mounting base 38 through its elongated hole 5a, and its rear end is connected to the button lifting lever 12 with the set screw 4a. has been done.

A button lifting rod 2 is connected to one end of the button lifting lever 12 by a set screw 11.
The other end of 2 is pivotally supported on the feed base 1 by a set screw 13. The amount of movement of the end surface of the button clamp mounting plate 19 is transmitted to the button floating link 5, and the linear motion of the link 5 is converted into circular motion by the button floating lever 12, and the movement of the end surface of the button clamp mounting plate 19 is Enlarge the amount further and move the button floating rod 2. Reference numeral 37 denotes a button lifting lever spring whose one end is connected to the lever 12, which urges the button lifting lever 12 to rotate clockwise about the set screw 13, and when the lever 12 is rotated counterclockwise. Even if it moves, it instantly returns to its original position.

Reference numeral 36 denotes a feed plate, which is attached to the feed base 1 by a feed plate set screw 35, and a groove 36a in which the button lifting rod 2 is guided and accommodated is provided on the top surface.
The button lifting rod 2 can be installed by simply fitting it into this groove 36a and adjusting the feeding plate 36 by loosening the feed plate set screw 35 so that it is installed in the correct position of the needle drop of the throat plate. No position adjustment is required. Also, 34 is washia.

Reference numerals 21 and 22 denote left and right button clamp plates, which are attached to button clamps 30 and 33 with set screws 20. The button clamps 30 and 33 have button clamp guide screws 32 and 32a.
The guide screws 32, 32a engage with the inclined grooves 19a, 19a of the button clamp mounting plate 19, and when the mounting plate 19 moves forward and backward, the button clamps 30, 33 are opened and closed. Reference numeral 17 denotes a button clamp mounting base, which is pivotally attached to the button clamp mounting plate 19 by a set screw 23 and a nut 31, and is rotatable about the set screw 23 as a fulcrum, and can be mounted by holding the adjustment lever 25. By moving the stand 17 and adjusting the position of the mounting screw 24 connected to the guide screw 32a, the degree of opening and closing of the button clamps 33 and 30 is adjusted. Button clamps 30 and 33 are button clamp springs 14
is biased from the outside in the closing direction. 2
9 is a button clamp set screw, 15 is a washer, 16 is a button clamp mounting base set screw, 7 is a screw for attaching the snap pin mounting plate 8 to the head of the sewing machine, 9 is a stop pin attached to the mounting plate 8 with a nut 10, 26 is an adjustment screw, 27 is a presser spring, and 28 is an adjustment nut.

The tip of the button lifting rod 2 on the feed plate 36 is normally located at a position where it crosses the needle drop hole on the feed plate 36, and a button clamping device attaches the button to the sewing position on top of this, and the sewing machine Cycle sewing. Sewing machine 1
In cycle sewing, the button attachment seam is formed while the button lifting rod 2 remains positioned on the back side of the fabric as shown in FIG.

When the sewing machine finishes one cycle of sewing, the button clamp mounting base 38 acts as a button release operation to complete sewing.
The button clamp mounting plate 19 is moved back to release the button.
As a result, the button lifting lever 12 rotates via the button lifting link 5, and the button lifting rod 2 retreats, and at the same time as the button is opened, it comes out of the thread forming the seam and separates from the sewn product.

[Effect of idea]

The present invention is constructed as explained in detail above, and the button sewing is completed at the end of one cycle.
By using the button release action, that is, the action of pushing the release drive part of the button clamping device, the button lifting rod can be moved at the same time to release it from the back of the fabric when sewing is completed, so it is similar to the drive of a conventional button lifting rod. There is no need for complicated and difficult timing adjustment of the driving part.
In addition, in the present invention, the button lifting rod separates from the back of the fabric at the same time as the button clamping device is driven to open.
Automation of button attachment becomes extremely easy.

Therefore, according to the present invention, the button lifting rod can be driven with a simple structure, there is no need to adjust the drive timing, and button attachment can be easily automated. Furthermore, it has many excellent effects such as making it easier to take out the sewn product from the sewing machine.

[Brief explanation of drawings]

Fig. 1 is a plan view of a button lifting mechanism showing an embodiment of the present invention, Fig. 2 is a side view of the same, Fig. 3 is a rear view of the button holding part in Fig. 1 seen from below, and Fig. 4 is a feed mechanism. It is a top view which shows the engagement state of a board and a button floating rod. Explanation of the main parts of the diagram, 2... Button floating rod, 5...
...Button floating link, 12...Button floating lever, 1
9... Button clamp mounting plate, 21, 22... Button clamp plate,
30, 33...button clamp, 36...feeding plate.

Claims (1)

[Scope of utility model registration request] In a button sewing machine in which the left and right button clamps open and close to hold and release a button by moving the button clamp mounting plate back and forth, the button clamp is disposed on the sewing machine feed stand so as to be movable back and forth, and the tip is attached to the button clamp mounting plate. a button float link that is always urged to be pressed against the rear end; and a button float lever that is rotatably pivoted to the sewing machine feed table at one end and has the rear end of the button float link pivotally attached to the center part. and a button lifting rod which is disposed on the sewing machine feed stand so as to be movable back and forth, the tip of which is positioned so as to cross the needle drop hole, and the rear end of which is pivotally connected to the other end of the button lifting lever; A button lifting mechanism for a button sewing machine in which the button lifting rod retreats via the button lifting link and the button lifting lever in conjunction with the release of a button by the back and forth movement of a button clamp mounting plate.