JPH0216824Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a wire feeding device for a spring manufacturing machine.

(Prior art) Conventionally, there is no known device of this type in which a vertically movable feed roller is pressed against another fixed feed roller by a roller pressure bolt screwed onto the machine frame via a pressure spring. It is being

(Disadvantages of the prior art) The conventional device has the following drawbacks. In other words, even after adjusting the pressure force by screwing the roller pressure bolt, the feed roller, which can move up and down, must be fixed and fed, such as when feeding a new wire after the wire has been used. When it becomes necessary to temporarily separate the roller from each other, in the conventional device, it is necessary to loosen the roller pressure bolt and then tighten it again to adjust the pressure force. However, if the pressing force is too strong, the wire may be deformed or damaged, and if the pressing force is too weak, slippage will occur between the feed roller and the wire, causing the problem that the wire cannot be fed as desired. Adjusting the pressure force by screwing the bolt required a considerable amount of time for both unskilled and experienced workers, so it took a long time each time the vertically movable feed roller was moved upward. This had the disadvantage of poor work efficiency, as the pressurizing force had to be readjusted. To solve this problem, it is known that the position of the roller pressure bolt is displayed on a scale; Therefore, it is virtually impossible or difficult to adjust the pressure force of the feed roller that requires delicate adjustment based on the scale, and in the end, the time required to adjust the pressure force can be reduced by that much. It wasn't.

(Purpose of the invention) This invention was made in order to eliminate the above-mentioned drawbacks. By using a cam, the feed roller, which can move up and down, is raised and lowered all at once. It is an object of the present invention to provide a wire feeding device that can immediately restore the set pressing force even after the feeding roller is raised after the adjustment is completed.

(Means for achieving the objective) This invention employs the following means in order to achieve the above objective. That is, in this invention, one of the pair of upper and lower feed rollers is made vertically movable, and a resilient spring is interposed between the axes of both rollers.
The vertically movable feed roller is pressed against the other feed roller by a length-adjustable roller pressure tool via a pressure spring, and the roller pressure tool is in contact with a cam having a pressure tool relief part. By operating the operating lever of the cam, the pressure relief part is made to face the roller pressing tool, and the vertically movable feed roller is separated from the other feed roller by the elastic force of the elastic spring. This is how it was done.

(Function of means) The function of this device is as follows. By operating the cam operating lever, the pressure relief part is placed opposite the roller pressing tool, and the vertically movable feed roller can be separated from the other feed roller by the elastic force of the elastic spring. By operating the cam operating lever, the cam is opposed to the roller pressing tool, and the vertically movable feed roller can be brought into contact with the other feed roller against the elastic force of the elastic spring. .

(Example) This invention will be described below based on an example shown in the drawings.

As shown in FIGS. 1 and 2, two long holes 3, 3 are bored in the front wall 2 of the machine frame 1, and a pair of upper and lower bearings 4, 5 are installed in each of these long holes 3, 3. The bearings 4 and 5 are fitted with feed rollers 6 and
Roller shafts 8 and 9 attached to No. 7 are loosely fitted. The lower bearing 5 is in contact with the upper end of a position adjustment screw shaft 11 screwed into a screw hole 10 in the front wall 2,
The position adjustment screw shaft 11 moves up and down by the screw rotation,
Its position is adjusted.
A tightening nut 12 is screwed onto the position adjusting screw shaft 11 to prevent it from loosening naturally. A resilient spring 13 is interposed between the pair of upper and lower bearings 4 and 5 to bias the upper bearing 4 upward, and a spring receiving recess 14 formed on the upper surface of the upper bearing 4 is formed of an upwardly convex arc-shaped leaf spring. A pressure spring 15 is placed,
A spring pusher 16 is placed over the upper surface of the pressure spring 15, and a headed pin 17 is fitted into a hole formed in the spring pusher 16. The headed pin 17 has a threaded cylinder 19 which is one member of the roller pressing tool 18.
The lower outer circumferential surface of the threaded tube 19 has a hexagonal circumferential surface 19a on which a tool such as a spanner can be hung, and the hexagonal circumferential surface 1 of the threaded tube 19
Vertical grooves 20 are formed at predetermined intervals around the outer peripheral surface except for 9a, and the vertical grooves 20 prevent rotation of the threaded cylinder 19 unless a predetermined moment is applied to it, as shown in FIG. Engagement protrusion 21
It is designed to fit. The engagement protrusion 21 is housed in a recess 23 of the screw member 22, and is urged to protrude by an elastic spring 24 that is compressed and housed in the recess 23. The screw member 22 is attached to the machine frame 1
It is screwed into a screw hole 25 in the front wall 2 of the front wall 2, and is prevented from loosening by a fixing nut 26 screwed therein. A threaded rod 24, which is the other member of the roller pressure tool 18, is attached to the female threaded portion 19b of the threaded cylinder 19.
The tip of a locking screw 29 is fitted into the longitudinal groove 28 formed in the shaft portion 27b following the top of the male threaded portion 27a, and the screw 29 is screwed into the screw hole 30 of the front wall 2. has been done. The above configuration prevents the threaded rod 27 from rotating together with the rotation of the threaded cylinder 19. A roller presser 18 consisting of a threaded rod 27 and a threaded cylinder 19 is attached to the front wall 2.
The guide hole 31 is vertically slidably fitted into the guide hole 31 formed in the guide hole 31 . A rotation shaft 33 is installed in a shaft hole 32 horizontally formed in the front wall 2 so as to communicate with the guide hole 31.
is loosely fitted, and a cam 34 is formed at a portion of the rotating shaft 33 facing the upper end of the threaded rod 27. The cam 34 has a pressurizing tool relief part 34a formed by cutting out a part of the rotating shaft 33, and a guide curved part 34c formed between the circular arc part 34b and the relief part 34a. An operating lever 35 is attached to the center of the rotation shaft 33 in the length direction.
5, a lever release groove 36 is formed in the front wall 2.

As shown in FIG. 1, a known wire guide 37 is attached to the front wall 2, and a coiling pin 38 and a core bar 39 are provided on the left side of the leftmost wire guide 37.

Next, the method of use and operation of the above-mentioned spring manufacturing machine will be explained.

First, the operating lever 35 is swung to the position shown by the dashed line in FIG.
4a is opposed to the upper end of the threaded rod 27. With this operation, the roller pressure tool 18, spring pusher 16, pressure spring 15, upper bearing 4, roller shaft 8, and feed roller 6 move upward all at once due to the action of the elastic spring 13. However, the feed roller 6 is separated from the lower feed roller 7. Next, a wire guide 37 corresponding to the wire W to be processed is attached to the front wall 2 so that the path of the wire W is in a straight line.
Loosen the tightening nut 12 of the position adjustment screw shaft 11, turn the screw shaft 11, move the lower bearing 5 up and down, adjust the position of the feed roller 7, and then tighten the tightening nut 12 to tighten the screw shaft 11. to be fixed. After that, insert the wire W from the right wire guide 37 side,
Pass the center line guide 37 through the left line guide 37
Expose from the left edge. Next, the operating lever 35
is in a vertical position as shown by the solid line in FIG. After pressing down, the hexagonal circumferential surface 1 of the threaded cylinder 19
9a is engaged with a tool such as a spanner to rotate the threaded cylinder 19 relative to the threaded rod 27 to change the screwing position of the two, in other words, to adjust the overall length of the roller pressing tool 18, The spring pressing tool 1 is pressed by the roller pressing tool 18 whose upward movement is prevented by the cam 34.
6. The upper feed roller 6 is pressed against the lower feed roller 7 via the pressure spring 15, the bearing 4, and the roller shaft 8, and the pressing force thereof is adjusted. The engagement protrusion 21 repeatedly moves into and out of the longitudinal groove 20 due to the moment applied to the threaded cylinder 19, but when the moment is no longer applied to the threaded cylinder 19, it enters the longitudinal groove 20 opposite the engagement protrusion 21. This prevents the threaded cylinder 19 from rotating naturally. After such preparation, when the machine is operated, the wire W is sent out toward the coiling pin 38 by the cooperation of the feed rollers 6 and 7, and wound by the cooperation of the core bar 39 to form a coil spring.

Now, when the wire rod W being processed up to now has been used and a new wire rod W has to be supplied to the spring manufacturing machine, or when an abnormality occurs in the wire guide 37, etc., the upper feed There are times when it is necessary to temporarily separate the roller 6 from the lower feed roller 7, but in such a case, the threaded cylinder 19
In other words, without changing the roller pressure state during operation, the operating lever 35 is swung to the position shown by the dashed line in FIG.
It is preferable that the pressure tool release portion 34a of the cam 34 corresponds to the upper end of the threaded rod 27 of the pressure tool 18. By doing so, due to the action of the elastic spring 13, the pressure tool 1
8 moves upward, and along with this, the spring pusher 1
6. The pressure spring 15, the bearing 4, and the roller shaft 8 move upward, and the feed roller 6 is separated from the feed roller 7. After the feed roller 6 is moved upward in this way and a predetermined operation is performed, when the operating lever 35 is returned to the vertical position, the arc portion 34b of the cam 34 comes into contact with the upper end of the threaded rod 27, and the pressurizing tool 18, the feed roller 6 pushes down the feed roller 7.
be forced to. During the above operation, since the overall length of the pressurizing tool 18 is not changed, the initially set pressurizing state can be immediately obtained by placing the operating lever 35 in the vertical position.

Note that, of course, the shape of the cam 34 is not limited to that of the embodiment.

(Effects of the invention) As described above, according to this invention, the roller pressure tool is raised or lowered all at once by a cam having a pressure tool relief part, and the vertically movable feed roller is moved up and down. Unlike conventional methods, the pressure bolt is not screwed in each time the feed roller is raised or lowered, so even after moving the vertically movable feed roller, the roller pressure tool cannot be returned to its original position by the cam. By the extremely simple operation of returning it to its original position, it can be returned to the initial pressurized state. Therefore, the pressing force only needs to be adjusted once when starting to use the spring manufacturing machine, which improves work efficiency compared to conventional equipment that requires adjusting the pressing force every time the vertically movable feed roller is moved up and down. It can be significantly improved. Further, since there is no need for the troublesome work of screwing the threaded cylinder of the roller presser every time the vertically movable feed roller is moved up and down, the work efficiency can be improved from this point as well.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention,
FIG. 1 is a front view of a partially crushed main part, and FIG. 2 is a cross-sectional view taken along the line shown in FIG. 1. 6, 7...Feed roller, 8,9...Roller shaft,
13... Resilience spring, 15... Pressure spring, 18...
Roller pressure tool, 34...cam, 34a...pressure tool relief section, 35...operation lever.

Claims (1)

[Scope of utility model registration request] One of the pair of upper and lower feed rollers is made vertically movable, and an elastic spring is interposed between the shafts of both rollers, and the length of the vertically movable feed roller is freely adjustable via a pressure spring. The roller presser is pressed against the other feed roller by the roller, and the roller presser is in contact with a cam having a pressurizer relief part, and by operating the operating lever of the cam, the roller pressurizes the pressure relief part. 1. A wire rod feed device for a spring manufacturing machine, characterized in that a feed roller that is vertically movable faces a tool and is separated from the other feed roller by the elastic force of an elastic spring.