JPH032542Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) This invention relates to an improvement of a wire feeding device for a printing wire binding machine.

(Prior Art) Conventionally, the mechanism shown in Fig. 3 of the drawings is generally known as a wire feeding device that feeds a binding wire in an intermittent linear manner in conjunction with the back-and-forth movement of the bookbinding unit. .

That is, the feed lower surface 22 and the inclined upper surface 23 inside the housing 21
It consists of a fixed block N and a moving block M, each of which has a feed roller 24 interposed between it and a spring 25 that urges it in the direction of arrow 27. When the moving block M moves forward in the direction of arrow 28, The internal feed roller 24 receives the force of movement to the left and moves the wire 26 by the wedge action of the slanted upper surface 23 into the block M.
and send it in the direction of arrow 29. At this time, on the fixed block N side, since the feed roller 24 is free to move to the right against the spring 25, it rotates in the direction of the arrow and allows the wire 26 to pass without fixing the wire 26. Next, when the movable block M moves backward in the direction of arrow 28', the feed roller 24 inside it is moved to the right and rotates in the direction of the arrow without fixing the wire 26. ’ direction. At this time, in the fixed block N, the feeding roller 24 is moved to the left, and the wedge action of the slanted upper surface 23 fixes and prevents the wire 26 from moving in the opposite direction to the feeding direction.

As described above, the wire 26 is fed intermittently by the repeated movement of the moving block M back and forth.

(Problem to be solved by the invention) However, in the conventional wire feeding mechanism described above, the wire is constantly fed while the machine is in operation, so even when there is no printed book in the wire binding section (stitcher head). Since the machine supplies wire, it must be used with the book in the wire binding section at all times, which is irrational and tends to result in a waste of power and energy. Furthermore, the smoothness and reliability of wire feeding were not sufficient, and troubles were likely to occur.

(Means for Solving the Problems) This invention was made to solve the above-mentioned problems, and the invention will be explained in detail below with reference to the embodiments shown in Figures 1 and 2.
is a moving block, and B is a fixed block, each having the same structure as will be explained below.

That is, the moving block A and the fixed block B are based on horizontal upper and lower plates 1 and 2, respectively, which are arranged parallel to each other at appropriate intervals. 3 is a roller on the upper plate 1 whose roller shaft 3a vertically passes through the upper and lower plates 1 and 2 and is supported by bearings 4 and 4; The magnet 6b and the armature 6a above the magnet 6b are respectively inserted and these constitute the electromagnetic brake 5. Further, a one-way clutch 7, which is rotatable only in the direction of arrow 16, is interposed on the roller shaft 3a and has an outer peripheral clutch holding portion fixed to the armature 6a. Furthermore, on the upper plate 1 is a rotary rod 8, which has a trochanter 11 (a ball bearing is used in the embodiment shown in the drawings) mounted on the tip thereof with a trochanter shaft 10, and is rotatable by a pivot shaft 9. A push spring 13 is interposed, which is pivotally connected to the rotary rod 8 and the upper plate 1 at both ends thereof. Then, the trochanter 1 is pressed so that the wire 12 is pinched between the roller 3 and the trochanter 11.
1 is biased by a spring 13.

As shown in FIG. 1, the movable block A moves forward and backward in conjunction with the movement of the book binding section relative to the fixed block B having the same structure as described above, thereby feeding the wire 12 intermittently. The electromagnetic brake 5 is activated during the cycle that requires feeding the wire 12, that is, the armature 6a is attracted and fixed by the excitation of the magnet 6b, and the outer periphery of the one-way clutch 7 is held against the lower plate 2. When fixed, the one-way clutch 7 moves in the direction of arrow 16 (wire 12 feed direction)
Only rotation is allowed. During a cycle that does not require feeding the wire 12, the electromagnetic brake 5 is in an open state, that is, when the magnet 6b is demagnetized, the one-way clutch 7 is released from the fixation of the lower plate 2 and is free (forward and reverse). It is in a free state where it can rotate. In short, the electromagnetic brake 5 operates the one-way clutch 7,
It is used to release it and set it in a free state.

(Function) In FIG. 1, when the electromagnetic brake 5 is applied and the one-way clutch 7 is working properly, the moving block A moves from the solid line position to the chain line position at the arrow 14.
When moving forward in the direction, the roller 3 on the moving block A side is fixed by the one-way clutch 7, so that
The wire 12, which is clamped by the trochanter 11 and fixed to the moving block A, is transferred forward in the direction of the arrow 15. At this time, roller 3 of fixed block B
The one-way clutch 7 is rotated in the direction of the rotatable arrow 16 to allow the wire 12 to pass. Next, when the moving block A moves backward in the direction of the arrow 14', the roller 3 of the moving block A rotates in the direction of the arrow 16 in which the one-way clutch 7 is rotatable, so that the wire 12 is rotated without being fixed. ’ direction. At this time, the roller 3 of the fixed block B
Since the one-way clutch 7 rotates in the direction of arrow 16, when the wire 12 tries to move in the direction opposite to the feeding direction of arrow 15, the wire 12 will move on the fixed block B side because the one-way clutch 7 is in the stopping direction. The wire 12 is locked between the roller 3 and the trochanter 11 while the moving block A is retreating in the direction of the arrow 14'.
is fixed. By repeating the above operations, the wire 12 is sequentially and intermittently fed by moving the moving block A back and forth. When the electromagnetic brake 5 is released (cut), the one-way clutch 7 is brought into a free rotating state, so that the feeding of the wire 12 is automatically stopped.

(Effect of the invention) This invented device is as described above, and the electromagnetic brake 5
A spring 13 is biased to pinch the wire 12 between the roller 3 and the roller 3, which is interposed with a one-way clutch 7 that rotates freely when released and only allows the wire 12 to rotate in the feed direction when activated. Since the structure uses a fixed block B equipped with a trochanter 11 and a moving block A, intermittent feeding of the wire 12 can be performed extremely smoothly and reliably compared to conventional wire feeding devices.
It has the effect of not causing any trouble or confusion.

In particular, with this invention, if the electromagnetic brake 5 is released (cut) even when the machine is in operation, the feed of the wire 12 is automatically stopped regardless of the machine's operation, so that the printed book is always kept in the wire binding section. It does not need to be used in the wired state, is extremely rational, and has excellent effects such as no wasted power or energy, and can improve the functionality of conventional wire feeding devices.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a main part showing an embodiment of the invented device, FIG. 2 is a longitudinal sectional view of the same main part, and FIG. 3 is an explanatory diagram of a conventional wire feeding device. 1, 2...Plate, 3...Roller, 3a...
Roller shaft, 4...bearing, 5...electromagnetic brake, 6
a... Armature, 6b... Magnet, 7...
...One-way clutch, 8...Rotating rod, 9...Pivot,
10... Trochanter axis, 11... Trochanter, 12... Wire,
13... Pressing spring, 14, 14', 15... Arrow,
21... Housing, 22... Lower feed surface, 23... Slanted upper surface, 24... Feed roller, 25... Spring, 26...
Wire, 27, 28, 28', 29...arrow, A,
M...Moving block, B, N...Fixed block.

Claims (1)

[Scope of utility model registration request] A roller 3 interposed with a one-way clutch 7 that freely rotates when the electromagnetic brake 5 is released and allows the wire 12 to rotate only in the feeding direction when activated.
a fixed block B equipped with a trochanter 11 biased by a spring 13 to pinch the wire 12;
A printing machine comprising a movable block A having the same structure that moves forward and backward with respect to the fixed block B in accordance with the movement of the bookbinding unit, and in which the wire 12 is intermittently fed by the movement of the moving block A back and forth. The wire feeding device of this wire binding machine.