JPS588646Y2 - Clamping device for unidirectional wire feeding - Google Patents

Description

[Detailed description of the invention] This invention is suitable for use in a binding machine, etc., which cuts a wire into a predetermined length, bends it, and then drives it into a sealing part. The present invention relates to a clamping device that allows

In a binding machine that cuts the wire to a predetermined length, bends it, and then drives it into the sealing part, the mechanism for feeding the wire into the cutting and forming part of the binding machine is a mechanism installed in the cylinder and piston rod. It consists of a moving clamp for directional feeding and a fixed clamp.

Conventionally, in both fixed clamps and movable clamps, a pair of clamp rollers disposed in a clamp case are urged by a clamp lever in a direction to narrow a wire insertion path formed between the clamp rollers, and the clamp rollers are It was supported from below to prevent it from falling.

In other words, the wire is clamped between a pair of clamp rollers,
Due to the need to separate the clamp roller, it was not possible to fix it to the clamp case, so a clamp lever was used to hold it as described above, but if the clamp lever was pushed down more than necessary, the clamp roller would fall out of the clamp case. It happened.

In such a structure in which the clamp roller is prevented from falling simply by a clamp lever, the following problems arise, especially in the case of a movable clamp.

In other words, if you loosen the clamp lever and force the wire between a pair of clamp rollers when inserting the wire, the clamp roller may fall or become twisted, resulting in the wire not being properly clamped. There were many.

The present invention provides a clamp device that eliminates the above-mentioned drawbacks, and the clamp rollers are loosely fitted into the clamp case through two holding pins between a pair of supporting walls that are installed opposite each other on the clamp case. By keeping them fitted, the holding pin prevents both clamp rollers from falling or moving freely regardless of how the clamp lever is operated, and the interval between the two clamp rollers can be changed within the range of play of the clamp rollers. It is characterized by being able to do the following.

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 1 is a sealing machine, cylinder part 2,
The movable clamp 3, fixed clamp 4, and piston rod 5 constitute a unidirectional wire feeding mechanism.

6 is a main piston for cutting, shaping, driving, etc. the wire, and 7 is the main body of the sealing machine, which includes claws, push plates, etc. that are moved by the main piston 6.

8 is a wire.

-71J part 2 moves the piston rod 5 up and down, and the fixed clamp 4 clamps the wire 8 and guides the wire 8 when unclamping.

As described above, the main piston 6 is used to cut, form, drive, etc. the wire 8 within the main body 7, and the movable clamp 3 is a device that reliably feeds a wire of the size of one stable.

The movable clamp 3 will be described in detail with reference to FIG. 2. Reference numeral 9 denotes a clamp case, and the clamp case 9 has a pair of opposing support walls 9a.

A pair of holding pins 1 parallel to each other are provided between the support walls 93.
0 is constructed and fixed, and a clamp roller 11 is loosely fitted and held on each holding pin 10.

A wire passage 12 through which the wire 8 is inserted is formed between the pair of clamp rollers, and since the clamp roller 11 is loosely fitted to the holding pin 10, the effective opening area of the wire passage 12 is within the range of this play. The interval between the clamp rollers 11 can be changed.

The pair of support walls 93 are each formed with a trapezoidal notch, thereby forming a pair of tapered guide surfaces 9b such that the distance gradually narrows along the longitudinal direction of the wire. .

(In the embodiment, the width becomes narrower toward the top in FIG. 2.

) Thus, when the pair of clamp rollers 11 are moved upward in FIG. 2 while their outer peripheries are in contact with the guide surface 9b, the distance between the two clamp rollers 11 is narrowed.

In addition, the clamp case 9 has a second
A clamp lever 14 is attached so as to be rotatable in the clockwise and counterclockwise directions, and one end 14a of the clamp lever.
extends below the clamp roller 11, while the other end 14
b extends outside the clamp case 9.

This clamp lever 14 is biased by a spring 15 so as to rotate counterclockwise in FIG. is pressed so that it becomes the narrowest (both clamp rollers 11 may be in contact with each other).

The center portion of the clamp roller 11 is knurled to prevent slipping, and the clamp roller 11
Both ends are smooth surfaces so that they can smoothly slide on the guide surface 9b.

Next, the operation of the movable clamp 3 will be explained.

When the movable clamp 3 moves downward by the operation of the piston rod 5, the clamp roller 11 moves upward due to friction with the wire 8, since the guide surfaces 9b on both sides of the clamp case 9 become narrower as they go upward. Since the two clamp rollers 11 move toward each other, the gap between the two clamp rollers 11 is further narrowed, and the two clamp rollers 11 clamp the wire 8 and pull the wire 8 downward.

At this time, the fixed clamp located above moves the wire 8 in the direction in which the clamp rollers move away from each other, so that the wire 8 is unclamped, and a wire of a fixed size is sent downward.

Furthermore, when the movable clamp 3 is moved upward by the operation of the piston rod 5, the clamp roller 11 operates downward within the clamp case 9, so that the clamp roller 11 is clamped along the expanding surface of the guide surfaces 9b on both sides of the clamp case 9. Since the rollers 11 move in sliding contact, the distance between the two clamp rollers 11 increases, and the wire 8 is separated, resulting in an unclamped state.

At this time, the upper fixed clamp operates to narrow the gap between the two clamp rollers, so that only the movable clamp 3 moves upward, and the wire 8 does not move.

That is, by repeating the vertical movement of the piston rod 5, the movable clamp 3 reciprocates up and down, and the wire 8 is always repeatedly sent down a fixed length.

Note that in this embodiment, the clamp roller 11 is connected to the holding pin 10.
However, the holding pin 10 is fixedly provided on the clamp roller 11, and the holding pin 10 is loosely fitted to the clamp roller 11.
may be held in a loosely fitted state on the support wall 9a.

In the present invention, two holding pins are passed between a pair of opposing support walls of the clamp case, and the clamp rollers are loosely fitted and held in the clamp case via the two holding pins. By doing so, there is no possibility that the clamp roller 11 will fall, and the first set-up process can be carried out more easily than in the past.

[Brief explanation of the drawing]

Figure 1 is an overall view of the binding machine. Figure 2 is a front view of the movable clamp. FIG. 3 is a bottom view of FIG. 2. FIG. 4 is a front view of the clamp roller. Figure 5 is a right side view of Figure 4.

Claims (1)

[Scope of utility model registration request] The frame passes two holding pins between a pair of opposing support walls of the clamp case, and the clamp rollers are loosely fitted and held in the clamp case via the two holding pins. The clamp case has a wire passageway through which the wire is inserted between the clamp rollers.
A pair of clamp rollers face each other so as to sandwich the peripheral surfaces,
A wire characterized by forming a pair of Te/<-shaped guide surfaces whose spacing gradually narrows along the direction of extension of the wire, and holding a crank lever that biases the clamp roller in the direction in which the guide surfaces become narrower. Clamp device for unidirectional feeding.