JPH0822181B2 - Strapping device for binding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention is a strapping device for a binding machine and can be used for a binding machine for attachments of binders and combines.

[Prior art]

As a conventional threading device for this type of binding string, for example,
There are JP-A-63-225 and JP-A-61-104913.

[Problems to be solved by the invention]

In the former invention, there is not provided a device for returning the wire-shaped feeding device fed by the feeding device as in the present invention. Further, in the latter invention described above, the string is locked to the elastic rod formed of the elastic band plate material having a small width and pulled out, and when the unwinding of the string is completed, the rewinding force of the elastic rod acts on the elastic rod itself. The configuration is However, in the present invention, the elastic rod is always exerted with the rewinding force, and even when the string is unwound, it is unwound against the unwinding force, so that there is a problem that it cannot be easily unwound.

Therefore, in the present invention, when the string is unwound, almost no resistance is exerted, and the returning force acts just before the completion of unwinding so that the string can be easily unwound. The needle is smoothly separated from the needle to prevent trouble.

That is, in the conventional binding string inserting device, the locking tool that penetrates the string passing hole of the needle by the wire-shaped feeding tool is stopped at the position where the locking tool projects to the side opposite to the needle.

Therefore, if the operator mistakenly operates the needle in the above-mentioned state, the wire-shaped feeding device is caught by the needle and is moved together, causing a trouble.

On the other hand, according to the present invention, when the string threading work is completed, the locking pair of the distal end portion of the wire-shaped feeding device penetrates the string threading hole of the needle and is in a protruding state, and then the back spring It is configured to be slightly pulled back by the action and retracted, and the locking body at the tip is returned to the inside of the string passing hole of the needle. Therefore, even if the needle moves due to an operator's operation error, the locking body, together with the wire-shaped feeder, automatically comes off from the string passing hole of the needle,
No trouble occurs.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention is a string threading device that locks a binding string and pushes it from the string storage case 1 through the guide pipe 12 to the needle 2, and locks the binding string to the distal end. The wire-shaped feeding tool 8 having the body 11 and the wire-shaped feeding tool 8 having the binding string locked to the locking body 11 are fed out through the guide pipe 12, and the locking body 11 at the tip end is the needle 2 And a feeding device 14 that feeds through the string passing hole 13 to a position where it projects, and a tip of the locking body 11 that is fed by the feeding device 14 and is in a protruding state through the string passing hole 13 of the needle 2. And a return device for returning the portion to at least a middle portion of the string passage hole 13, and the return device includes a coil-shaped back spring 15 installed inside the guide pipe 12, and a rear position in the feeding direction of the wire-shaped feeding device 8. Provided on the side end 8a The back spring
The compression body 16 that abuts on the rear side end portion of the feeding direction of 15 and the member that is located on the front side of the guide pipe 12 in the feeding direction and abuts on the front side end portion of the back spring 15 in the feeding direction. It is configured as a string threading device of a binding machine.

[Operation and Effect of the Invention] The leading end of the string A pulled out from the string storage case 1 is held by the string locking device 3, and the wire feeding device 8 is fed out along the guide pipe 12 by the feeding device 14. Then, when the locking body 11 at the tip of the wire-shaped feeding device 8 passes through the string locking device 3, the string A is locked and held and is fed out.

Then, the locking body 11 is in a projecting state where it penetrates the string passing hole 13 of the needle 2 from the tip end portion of the guide pipe 12 and reaches the opposite side, and the string passing action is completed.

Then, when the hand is removed from the handle 7 of the feeding device 14, the coil-shaped back spring 15 provided inside the guide pipe 12 and the end portion 8a of the wire-shaped feeding device 8 in the feeding direction are provided. The compression body 16 that abuts the terminal end of the spring 15 in the feeding direction, and the guide pipe 1
By the returning action of the returning device which is located on the starting end side of the feeding direction 2 and which is in contact with the feeding starting end of the back spring 15, the wire-shaped feeding tool 8 is returned to the slightly retracted side, The locking body 11 with the string locked retracts from the protruding state of the string passing hole 13 of the needle 2 to the middle part and stands by.

As described above, according to the present invention, after the binding cord is inserted through the cord insertion hole 13 of the needle 2 until it protrudes, the wire-shaped feeder 8 and the locking body 11 are slightly returned by the returning device, Even if the needle 2 is mistakenly rotated by waiting in the string passing hole 13 of the needle 2, the wire-shaped feed tool 8 and the locking body 11
Is naturally detached from the string passing hole 13 of the needle 2, so that trouble can be avoided and it is safe.

Moreover, since the returning device is configured as described above, the feeding operation of the wire-shaped feeding tool 8 causes the force in the returning direction to be stored at the end of the feeding operation, which weakens the feeding operation force and facilitates the operation. Although it can be operated, the returning force reliably acts on the wire-shaped feeding tool 8 and the locking body 11 after the completion of feeding, the engagement with the needle 2 is avoided, and the trouble with the needle 2 is prevented beforehand. It is possible.

〔Example〕

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

The cord storage case 1 is configured to store a bundle of the binding cords A of an internal type and take it out from one side.

The feeding device 14 is located on the side of the string case 1 and is configured to rotate the feeding gear 10 by the rotation of the handle 7. Reference numeral 8 denotes a wire-shaped feeding device fed by the feeding device 14. A wire is wound around the outer periphery of the wire-shaped feeding device 8 to form the locking teeth 9 over the entire length, and the guide pipe 12 is provided.
It is movably installed inside. Then, when the feeding gear 10 rotates, the locking teeth 9 of the wire-shaped feed tool 8 are locked, and the wire-shaped feed tool 8 is fed along the guide pipe 12. Reference numeral 11 is a locking body provided at the tip of the wire-shaped feeder 8 for locking the binding cord A.

15 is a back spring. Back spring 15
Is a coil-shaped spring which is provided on the terminal side in the feeding direction in the guide pipe 12 and is fitted to the terminal side in the feeding direction of the wire-shaped feeding tool 8. Then, when the wire-shaped feeding tool 8 is fed out and the compression body 16 provided at the end portion 8a thereof reaches the feeding completed state as shown in FIG. 4, the guide pipe 12 on the leading end side in the feeding direction is The back spring 15 is in a compressed state by the end portion and the compression body 16. Then, when the operator releases the handle 7 and puts it in a free state, the wire-shaped feeding device 8 is a returning device composed of the back spring 15 and the compression body 16 and is slightly retracted (backed) to be returned. . 3
Indicates a string locking device.

Then, when the feeding device 14 completes feeding, the tip of the locking body 11 on the wire feeding device 8 side penetrates the string passing hole 13 of the needle 2 to be in a protruding state, and the operator releases the handle 7. In the free state, the tip portion of the locking body 11 is pulled back by the back spring 15 to at least the middle portion of the string passing hole 13 of the needle 2.

The cord brake device 17 is composed of a brake plate 4 and a brake spring 18 for tensioning the brake plate 4, and the lever 6 can release the brake plate 4.

The string tension device 5 is configured to be switchable between a string threading position and a tension acting position by operating the lever 6.

 Next, the operation of the embodiment will be described.

First, the operation of passing the string A through the needle 2 from the bundle of the binding strings A stored in the string storage case 1 prior to the binding work will be described.

The leading end of the string A pulled out from the string storage case 1 is held by the string locking device 3. Then, the brake plate 4 and the string tension device 5 are operated by operating the lever 6,
Is opened and the string tension device 5 is looked into the string passage.

Next, when the handle 7 is rotated, the locking tooth 9 of the wire-shaped feeding tool 8 is locked by the feeding gear 10,
The cord A is fed out along the guide pipe 12, and when the locking body 11 at the distal end passes through the cord locking device 3, the cord A is locked and held and fed out.

Then, as shown in the phantom line in FIG.
The leading end of the guide pipe 12 penetrates the string passing hole 13 of the needle 2 and reaches the opposite side, completing the string passing action.

At this time, the handle 7 of the feeding device 14 reaches the end point and does not rotate, and when the hand is released from the handle 7, the wire spring 8 is slightly retracted due to the returning action of the back spring 15 and the compression body 16. Returned to. Then
As shown by the solid line in FIG. 4, the locking body 11 with the string locked is retracted to the middle of the string passing hole 13 of the needle 2,
You will have to wait.

Next, the string is removed from the locking body 11, the handle 7 is rotated in the opposite direction, and the wire-shaped feeding tool 8 is rewound by the feeding device 14.

As described above, according to the present invention, when the binding cord is inserted through the needle 2 and then the hand is released from the handle, the wire-shaped feed tool 8 and the locking body 11 are provided with the back spring 15 and the compression body.
It is returned slightly to the retracted side by 16 and returned to the state of standing by in the string passing hole 13 of the needle 2. Therefore, even if the needle 2 is mistakenly rotated, the wire-shaped feeding tool 8 and the locking body 11 are naturally separated from the string passing hole 13 of the needle 2 and do not rotate together with the needle 2, which is safe.

Moreover, the returning device is composed of the back spring 15 and the compression body 16.
Since the wire feeding device 8 is configured to be configured as described above, a force in the returning direction is stored immediately after the completion of the feeding with respect to the feeding operation of the wire-shaped feeding tool 8, and the feeding operation force is weakened to allow easy operation. The returning force reliably acts on the wire-shaped feeder 8 and the locking body 11 after the completion of feeding to avoid the engagement with the needle 2 and prevent the trouble with the needle 2 in advance.

[Brief description of drawings]

1 shows a plan view, FIG. 2 shows a side view, FIG. 3 shows a working view, FIG. 4 shows a working view, and FIG. 5 shows a plan view. FIG. 6 is a side view. A ... Bundling string 1 ... String storage case, 2 ... Needle 3 ... String locking device, 4 ... Brake plate 5 ... String tensioning device, 6 ... Lever 7 ... Handle, 8 ... Wire-like feeder 9 ... Locking tooth, 10 … Feeding gear 11… Locking body, 12… Guide pipe 13… String passing hole, 14… Feeding device 15… Back spring 16… Compressing body 17… String braking device, 18… Brake spring

Claims (1)

[Claims] 1. A wire-like feeding device having a locking body (11) for locking a binding string at a tip end in a string threading device that locks the binding string and pushes it from a string storage case (1) through a guide pipe (12) to a needle (2). 8 and the wire-shaped feed tool 8 which holds the binding string on the locking body 11 is fed out through the guide pipe 12 and the locking body 11 at the tip portion is the string passing hole of the needle 2.
A feeding device 14 that extends to a position where it penetrates 13 and projects,
And a return device for pulling back the tip end portion of the locking body 11 which is fed out by the feeding device 14 and is in a protruding state through the string passing hole 13 of the needle 2 to at least a middle part of the string passing hole 13. The returning device is provided at the coil-shaped back spring 15 installed inside the guide pipe 12 and the rear end 8a of the wire-shaped feeding device 8 in the pay-out direction, and the back side of the back spring 15 in the pay-out direction. It is composed of a compression body 16 that abuts on an end portion, and a member that is located on the forward side in the payout direction of the guide pipe 12 and that abuts on the forward side end of the back spring 15 in the payout direction. A strapping device for a binding machine.