JPH0379244B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application: The present invention relates to a mechanism for fixing free ends of wires wrapped around objects to be bound in a portable wire binding device.

Background of the Invention: Conventionally, various devices have been proposed that automatically perform the task of bundling various articles mainly with metal wires (hereinafter referred to as wires).
Since these devices are generally stationary, the objects to be bound must be brought into the device and bound, and therefore the objects cannot be bound at any desired location.

Therefore, we have completed a hand-held wire binding machine that eliminates this inconvenience and allows objects to be bound to be bound at required locations with wire.
Such a small binding machine is required to have good workability, and in particular, it is important that the free end of the wire wound around the object to be bound is securely fixed to the clamp part of the binding machine to facilitate the work. desirable for However, as the tying machine becomes smaller, the wire clamp portion also becomes smaller, and since only the free end must be fixed first, the structure tends to become complicated and may cause failure. The presence of such a failure-generating part is something that should be avoided in a tool of this type that tends to be messy when handled.

Purpose of the Invention: The present invention has been made in view of the above circumstances, and has a simple configuration to easily fix the free ends of the binding wires prior to binding, thereby improving workability and preventing breakdowns. The purpose of the present invention is to propose a mechanism for fixing the free end of a wire in a portable wire tying machine, which is configured to prevent this from occurring.

Structure of the invention: In order to achieve the above object, the present invention includes the following:
In a motorized binding machine that is separate from the wire supply mechanism and can be carried, a wire free end bending piece is attached along the open end of the wire free end clamping side of the wire binding mechanism consisting of one clamp and a wire twisting piece, The wire free end bending piece is an operating piece built into an auxiliary handle attached to the binding machine body or the bundling head cover, and when the operating piece is pulled in, the wire free end bending piece is pushed down and the free end of the wire is moved to the side of the clamp. They were connected using a transmission mechanism that pushed and bent them.

The operating mechanism of the wire free end chucking means in the present invention is such that a sector gear is provided at the operating end of a lever-type operating piece built into the auxiliary handle, and is meshed with a small gear on a shaft built into the wire bundling head. The rack gear is meshed with another gear on the small gear mounting shaft, and the lower end of the rod with the rack gear is attached as a bent piece at the free end of the wire so that it can move up and down along the side of the open side clamp. be.

Further, in the present invention, the upper part of the wire free end bent piece is attached so that it can be moved up and down so that it can be pushed down only when necessary by a cam rotated by an operating piece, and pulled up by a spring force when not in use.

Embodiment: Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. As shown in FIGS. 1 and 2, a wire W supplied from a separately installed wire supply device 40 is received, and a An easy-to-carry binding machine 1 with a handle for binding objects has a binding head 10 attached to the front part of a main body 2 equipped with a grip handle 3, and a binding head 10 attached to the front part of the main body 2, which A drive motor M is flanged at the position, and when the motor M outputs power, it protrudes into the bundling head 10,
The binding mechanism 20 is driven by a gear mechanism. Binding mechanism 20 within this binding head 10
is arranged adjacent to the cutter 28, clamp 22, twisting piece 21, and clamp 22' from the main body 2 side,
The wire W is passed from the feeding device 40 through the guiding device 5 attached to the lower side of the grip handle 3 through the guide roller group 5',
5'' to be fed out through the binding mechanism 20.

The binding mechanism 20 has a structure as illustrated in FIGS. 3 and 4, and the twisted piece 21 has a deep cut groove 21' from one side along the entire length along the axis.
Moreover, this cut groove 21' is made wide enough to allow the wire to be inserted in the appropriate section at the longitudinal center, and wider than the center section at the front and back so that the twisted wire can be accommodated. , and has a widened shape with chamfered edges so that the wire can be easily taken in and out of the cut groove 21'. Both ends of the twisting piece 21 are rotatably supported by bearings 13, 13 provided on the binding head 10, and a gear 21'' is formed on the outer periphery so that the twisting piece 21 rotates by receiving power from the motor output shaft. There is.
Wire clamps 22, 22' are disposed on both front and rear sides of the twisting piece 21 support, and the timing of the cam 25 and cam lever 26 is adjusted so that the cam 25 and cam lever 26 clamp the wire W for a required time. It has been arranged and arranged. The holding pieces 23, 23' of the clamps 22, 22' are pulled up by the force of the coil springs 24, 24', and the cam levers 26, 23' are pulled up by the force of the coil springs 24, 24'.
26, and the receiving pieces 27, 27' opposite to the holding pieces 23, 23' are both fixed to the lower part of the head 10, and two wires W are held in parallel inside thereof. Auxiliary receiving pieces 27a, 27b are provided with protrusions that partition the wires, and these various auxiliary receiving pieces 27a, 27b are lifted up so that there is no problem even if the protrusions are pushed down when clamping or when inserting the wire from the outside. Equipped with a torsion spring. Also, cutter 28
is the wire fed out from the guide device 5 on the main body side.
A cutter head 28' is provided with a wire insertion notch 28'' thick enough to allow only one wire to pass through the cutter, and has a wire insertion notch 28'' with a slope that narrows toward the exit side. It is designed to cut after the binding operation,
The wire W is cut at the end face of the cutter head 28' and the adjacent end face of the clamp receiving piece 27'.

A device 30 that is attached to such a binding mechanism 20 and that locks the free end of the wire during binding includes a free end bending piece 31, a power transmission mechanism 32 for vertically moving this bending piece 31, and an operating lever 36. It consists of.

The free end bending piece 31 of the wire is arranged in the shape of a vertically flat rod so that the side edge 31' is located at least by the diameter of the wire W from the side surface of one of the clamps 23 of the binding mechanism 20, It is supported in a vertically slidable manner by a support portion 14 protruding from the inner wall of the head cover 11, and has a lower end portion 31'' of the bent piece.
is positioned so that only the free end W' of the wire protruding through the front side of the clamp 22 is pressed and bent. On one side of the upper end of this bent piece 31, a rack gear 33 is carved in an appropriate section. The rack gear 33 of the bent piece 31 has brackets 15, 15' protruding inside the head cover 11.
A gear 35 fixed on a shaft 34 that is rotatably supported at the clamp is engaged with the shaft 34, and a gear 35' that meshes with a sector gear 37 provided at the end of the clamp operation lever 36 is fixed at another position on the shaft 34. be. The clamp operating lever 36 is supported by a pivot pin 17 in a cut hole 16 formed in a part of the auxiliary handle 12 whose intermediate portion protrudes from the side of the head cover 11, and is connected to the sector gear 37. The operating portion 36' extending on the opposite side is shaped like a lever with an appropriate ratio,
The fan-shaped gear 37 protrudes from the cut hole 16 of the auxiliary handle 12 to the inside of the cover 11, and the operating part 3
6' is made to protrude appropriately from the underside of the handle 12,
By grasping this, the gear power transmission mechanism 32
The free end bending piece 31 is lowered through the wire to bend the free end W' of the wire to be clamped to the side of the clamp 23.

The function of the apparatus of the present invention configured as described above is that when objects to be bound such as steel bars, shaped steel, steel pipes, and logs are bound with wire, electric power prepared in advance is used to control the binding machine 1 and the supply device 40. control mechanism,
A hand switch 7 attached to the grip handle 3 of the binding machine 1
The wire W is fed out from the supply device 40 through the guide device 5 of the binding machine 1, passing through the main part of the binding mechanism 20 in the lower part of the binding head 10. When the required amount of wire W has been fed out, the feeding device 40 stops feeding out the wire W, and the wire W is wound around the binding part of the object to be bound, and the free end of the wire is connected to the binding head 1.
0, between the holding pieces 23, 23' of the clamps 22, 22' which are open on the side of is slightly protruding from one clamp 22, and then by grasping the operating portion 36' of the clamp operating lever 36 attached to the auxiliary handle 12, the fan-shaped gear 37 provided at the opposite end of the operating lever 36 is rotated. gears 35' that mesh with each other
through which the shaft 34 rotates and another gear 3 on the shaft 34 rotates.
5, the bending piece 31 with the rack gear 33 on its upper part is lowered, and its lower end 31'' pushes the free end w' of the wire protruding from the clamp 22. Can be bent.

By doing this, the free end w' of the wire wound around the object to be bound is connected to the receiving piece 2 of the clamp 22.
7 and the lower end 31'' of the bending piece 31.Therefore, the wire feeding device 40 is driven in the reverse direction manually or by operating a switch attached to the gripping handle 3, and the slack of the wound wire W is removed. When the wire has been wrapped around the object to be bound, the twist operation switch 7' is pressed to drive the motor M, which activates the gear mechanism to connect the cams 25, 25 of the binding mechanism 20 and the cam levers 26, 26. Accordingly,
When the holding pieces 23, 23' of the clamps 22, 22' are pushed down to fix the wire W, and the twisting piece 21 is rotated, the two wires W between the clamps 22, 22' twist their central parts. They are bound together. Just before this binding ends, the cutter 28 is operated to cut the wire W and separate the bundled portions.

After that, or just before the end of the binding operation, by releasing the operating lever 36 that has been gripped together with the auxiliary handle 12, the torsion spring 38 attached to the operating lever 36 or the pull-back spring attached to the middle part of the bending piece 31 ( (not shown), the bending piece 31 and the operating lever 36 return to their original states,
The free end w' of the wire W, which was bent and locked on the side of the clamp 22, is released, and the binding device can be removed from the binding section.

In the embodiments described above, the bending piece for bending the free end of the wire during binding is of the type driven by a rack and pinion gear system. Even if a cam is attached to the other end of the gear mounting shaft 34 that meshes with the gear, and the bent piece that can be returned to its original position is pushed down by the cam when necessary, the same effect as described above can be obtained. .

In addition, the coil spring is interposed between the upper end of the bending piece and the part that protrudes in front of the pivot point of the operating lever without using a sector gear, and when the operating lever is grasped, the coil spring is released. The bending piece may be configured to be pushed down when pressed by a predetermined amount. In this case, the structure can be simplified by having one end of the coil spring supported by a part of the bundling head cover so that the coil spring can apply upward return force to the bent piece.

In addition, by providing an auxiliary handle to the binding machine and operating it at the binding position, the binding machine can be kept in the correct position to perform accurate binding, which can improve work efficiency.

Effects of the Invention: According to the present invention, as mentioned above, when the device is compact and can be carried to any position for tying work, an auxiliary handle suitable for positioning and holding the free end of the tying wire on the tying machine is provided. If you grip the handle with your hand and also squeeze the operating lever, you can lock and secure it to the clamp part without requiring additional power, making it easier to wrap and position the wire, allowing you to perform the binding work correctly and quickly. This enabled work to be carried out efficiently and without any breakdowns.

[Brief explanation of drawings]

Figure 1 is an external perspective view of a tying machine equipped with a wire free end fixing mechanism according to the present invention, Figure 2 is a schematic diagram, and Figure 3 is a schematic diagram.
The drawing is an enlarged partial cross-sectional view of the main part, and FIG. 4 is a - perspective view of FIG. 3. 1... Binding machine, 2... Main body, 3... Gripping handle,
5... Guide device, 10... Binding head, 11...
Head cover, 12... Auxiliary handle, 14...
Bent piece support part, 15, 15'...Bracket, 1
6... Cut hole portion, 17... Pivot pin, 20...
Binding mechanism, 21... Twisting piece, 22, 22'... Wire clamp, 23, 23'... Pressing piece, 27,
27'...Receptacle piece, 28...Cutter, 30...
Wire free end locking device, 31... Free end bending piece, 32... Power transmission mechanism, 33... Rack gear, 35, 35'... Gear, 34... Shaft, 36...
...Operation lever, 37...Sector gear, W...Wire, w'...Wire free end.

Claims (1)

[Claims] 1. In a motor-equipped tying machine that is separate from the wire supply mechanism and can be carried, the wire tying mechanism, which consists of a pair of clamps and a wire twisting piece, reciprocates along the open end of the wire free end clamping side of the wire tying mechanism, orthogonal to the direction of wire movement. A movable wire free end bending piece is attached, and the wire free end bending piece has a lever-type operating piece built into an auxiliary handle attached to the bundling head cover, and by retracting the operating piece, the free end bending piece moves forward. A fixing mechanism for a free end of a wrapped wire in a portable wire binding device, characterized in that the free end of the wire is connected by a transmission mechanism that presses the free end of the wire to the side of the clamp and locks it.