JP3050516B2 - Prevention mechanism of wire dumping in binding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for preventing a wire from being thrown away in a binding machine for preventing a wire from being thrown away by performing a loading process without performing a binding process when the wire is loaded.

[0002]

2. Description of the Related Art Generally, when reinforced concrete is applied to a building or a structure, concrete is laid after bundling rebars crossed vertically and horizontally. Recently, bundling of rebars has been performed by a tying machine. ing. In this binding machine, as shown in FIG. 10, the main switch 30 is turned on and the wire 32 is sent out by pulling the trigger 31 at the time of binding, and the wire 32 is fed out in a loop form from the curved end portion of the guide arm 33 to rebar 34 After winding around the crossing of, a part of the loop is gripped by the torsion hook 35 and twisted and rotated to bind the wire. The spool around which the wire is wound is newly loaded into the binding machine. When he did, he pulled out the trigger and pulled out the wire.

[0003]

However, when a new wire is loaded, the leading end is behind a predetermined position (the cutter of the cutting device). Insufficiency, twisting, etc. occur, so the first time after the wire is loaded is thrown away and thrown away without performing the actual bundling process, so that the wire is wasted.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has an object of preventing a wire from being thrown away in a binding machine capable of preventing the wire from being thrown away and preventing the wire from being wasted. The task is to provide.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a mechanism for preventing a wire from being thrown away in a binding machine according to the present invention comprises a wire feeder for sending a wire for reinforcing bar binding, and a wire crossing device for feeding the fed wire. A guide arm for guiding a loop around the part, a torsion device for gripping and twisting a part of the wound wire loop, and a cutting device for cutting the wire loop from the original wire. In the binding machine provided with, in the loading mode for newly loading the wire into the binding machine, a control means for performing a loading process and stopping the wire feeder when the tip of the wire is fed to a predetermined position. It is characterized by the following.

The binding machine is provided with a detecting means for detecting the loading mode, and based on a detection result of the detecting means,
The control means may perform a loading process for stopping the wire feeder when the tip of the wire is fed to a predetermined position.

[0007]

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

FIG. 1 shows a main part of a binding machine. This binding machine winds a wire 1 wound on a spool 7 forward and a wire feeding device 2 for winding the fed wire 1 in a loop. Guide arm 3 and wound wire 1
And a cutting device 5 for breaking a wire loop from the original wire 1. Wire feeding device 2, twisting device 4, and cutting device 5
Is operated by the motor 20 and the motor 21 provided on the binding machine main body.

In the above-mentioned binding machine, the main switch is turned on, the micro switch 6 is turned on by pulling the trigger 8 when the reinforcing bars a and b are bound, the motor 20 rotates, and the spool 7 is moved by the wire feeder 2. After the wire 1 is sent out from the wire and wound by the guide arm 3 in a loop, the motor 21 rotates and the torsion device 4 grips a part of the loop with the hook 9 and twists to rotate, thereby binding and cutting. The binding process is performed by the device 5 to cut and separate the loop from the original wire 1.

By the way, the binding machine recognizes a loading mode in which a new wire is loaded, and stops the wire feeding device when the tip of the wire 1 sent out by the wire feeding device 2 is sent to a predetermined position. Control means A is provided.

The control means A can be constituted by a microprocessor (MPU) 10. The MPU 10 is provided to recognize the loading mode based on a control program stored in a memory (not shown) and to control the wire feeder 2.

The loading mode can be set by performing an operation different from the usual operation. For example, by turning on the power switch while pulling the trigger 8, the loading mode can be set.
What is necessary is just to program so that PU10 recognizes a loading mode.

Then, before the cutting device 5 (at a predetermined position).
Sensor 1 for detecting that the tip of the wire 1 sent out by the wire feeder 2 has reached the wire passage 11 of
2, and the detection result of this sensor 12 is
10 is provided so as to be fed back.

The sensor 12 is constituted by a transmission type photointerrupter. The sensor 12 has a light emitting element on one side of the passage 11 and a light receiving element on the other side.
The wire 1 is provided so as to detect the presence of the wire 1 by blocking the light. This sensor may be constituted by a microswitch.

The operation of the binding machine having the above-described configuration will be described with reference to the flowchart of FIG. When the user loads the spool 7 newly wound with the wire into the binding machine, inserts the end of the wire 1 into the guide groove 15 of the wire, and then performs the loading mode operation of turning on the power switch while pulling the trigger 8 ( In step ST1), the MPU 10 recognizes the loading mode by turning on the power switch in a state where the trigger is pulled (step ST2). In this state, since the trigger 8 is pulled, the wire feeder 2 continues to operate (step ST).
3) Send out the wire 1. The MPU 10 determines whether the sensor 12 has detected the wire 1 (Step ST4),
When the tip of the wire 1 reaches the sensor 12, the sensor 12 feeds back a detection signal to the MPU 10.
U10 determines that the tip of the wire 1 has reached the predetermined position, proceeds to step ST5, stops the supply of the voltage to the motor 20, stops the wire feeder 2, and completes the loading process.

Once the wire 1 is set, the MPU 10
Is determined to be the binding mode (step ST2), and
The process proceeds to T7 and waits for the trigger 8 to be pulled. If the trigger 8 is pulled, the process proceeds to step ST9 to perform the binding process, returns to step ST1, proceeds to step ST6 as it is, and proceeds to step ST7 to wait for the trigger 8 to be pulled again.

The sensor 12 continuously detects the presence of the wire 1 even in the binding mode. However, since the sensor 12 is not in the loading mode, the MPU 10 ignores the detection signal of the sensor 12 and ignores the detection signal of the sensor 12. Never stop.

As described above, by performing a loading mode operation different from the normal operation, the MPU recognizes the loading mode, performs a loading process of stopping the tip of the wire at a predetermined position, and does not perform the binding operation. In addition to preventing incomplete bundling, it is possible to eliminate waste of wire and perform a reliable bundling process from the first bundling.

[0019] Further, an abutting member may be arranged on the wire passage. As shown in FIG. 3, the abutting member 25 is disposed so as to block the passage 11, and is provided so as to open and close the passage 11 by operating the lever 18. This butting member 25 is shown in FIG.
As shown in (a), one end is guided by a guide 26 and urged by a spring 27, and the other end is engaged with a pressing piece 18a formed on a lever 18 and has a cutout 25a through which the wire 1 passes. Have been. Lever 1
By pressing the lever 8 and rotating the lever 18 about the shaft 19, the mesh between the wire feed gears 16 and 17 is released, and the pressing piece 18a releases the pressing of the abutting member 25, so that the pressing piece 18a is urged by the spring 26. The butting member 25 moves, and the notch 25a separates from the passage 11 and closes the passage 11. When the lever 18 is released, as shown in FIG. 4B, the lever 18 is urged by the spring 28 to rotate in the opposite direction, push back the abutting member 25, and the notch 25a moves onto the passage 11 to move the passage. 11 is released, the wire 1 is sandwiched between the wire feed gears 16 and 17, and the motor 20 rotates to feed the wire 1 forward along the passage 11.

Incidentally, as shown in FIG.
Is stored in advance in the memory, and the MPU 10 compares the wire feed amount of the wire feeder 2 with the distance L registered in the memory, and determines that the feed amount and the distance L What is necessary is just to stop the wire feeder 2 after judging that it became equal.

The operation of the above-structured binding machine will be described with reference to the flowchart of FIG. First, the lever 18 is pushed to disengage the wire feed gears 16 and 17, and the wire 1 is guided by the guide groove 15 until the front end of the wire 1 hits the contact member 25 so that the rear end 25 of the contact member closes the passage 11.
Insert Thereafter, when the lever 18 is released and returned, the wire 1 is bitten between the wire feed gears 16 and 17, and at the same time, the pressing piece 18a of the lever 18 moves the butting member 25 to bring the abutting state. It is released.
After that, when the loading mode operation for turning on the power switch while pulling the trigger 8 is performed (step ST1), MP
U10 determines the loading mode (step ST2), and the wire feeder 2 operates (step ST3) to feed the wire 1 forward in the passage 11.

When the wire feeder 2 feeds the wire 1 equal to or longer than the distance L, the MPU 10
It is determined that the tip of has reached a predetermined position (step ST
4) Stop supplying the voltage to the motor 20 to stop the wire feeder 2 (step ST5), return to step ST2, determine the binding mode, proceed to step ST7, and wait for the trigger 8 to be pulled. When the trigger 8 is pulled, a normal binding process (step ST9) is executed, and a step ST2,
The process proceeds to step ST7 via step ST6, and waits for the trigger 8 to be pulled again.

The wire feed amount is calculated, for example, by detecting the amount of rotation of the wire feed gears 16 and 17 of the wire feeder 2 by a sensor (rotary encoder) (not shown) and calculating the MPU 10 based on the detection result. do it.

As mentioned above, after the tip of the wire is pressed against the abutting member, the binding operation is performed by turning on the power switch while pulling the trigger, thereby performing the binding operation only by sending the wire to a predetermined position. Absent.

It is also possible to arrange a sensor at a predetermined position and stop the wire feeder when the sensor detects the tip of the wire.

In the binding machine described above, the binding mode operation is performed by turning on the power switch while pulling the trigger. However, the present invention is not limited to this operation. For example, the switch is set to a position where the user can operate. After the power switch is turned on, the switch may be pressed to notify the MPU of the loading mode.

Next, a description will be given of a binding machine provided with a detecting means for detecting the loading mode. As shown in FIG. 6, the detecting means B includes a sensor (transmission type photo interrupter) 30 disposed in a part of the wire passage 11, and the sensor 30 includes a light emitting element on one side of the passage and the other side. The light receiving element is arranged on the side surface, and the passing wire 1 is provided so as to detect the presence of the wire 1 by blocking the light.

When the sensor 30 does not detect the wire 1, the control unit A (MPU 10) judges the loading mode, the trigger 8 is pulled, the wire feeder 2 is operated, and the wire 1 is sent out to cut the wire. When the sensor 31 disposed before the position 5 is detected, it is determined that the tip of the wire 1 has reached a predetermined position, and the wire feeding device 2 is stopped.

The operation of the binding machine having the above configuration will be described with reference to the flowchart of FIG.

When the power of the binding machine is turned on, it is determined in step ST1 whether or not the sensor 30 detects the wire 1 (the sensor 30 is ON), and if not, the loading mode is determined (step ST2). In the loading mode, the process waits for the trigger 8 to be pulled in step ST3. When the trigger 8 is pulled (step ST4), the process proceeds to step ST5 to operate the wire feeder 2.

When the wire operating device 2 is operated, the process proceeds to step ST6, where the sensor 31 detects the wire 1 (sensor 3).
1 is turned on). If the wire 1 has not been detected, the process returns to step ST5 to continue the operation of the wire feeder 2. If the wire 1 is detected, it is determined that the wire 1 has reached the predetermined position, and the wire feeder 2 is stopped (step ST5). ST7), the loading process is completed, and step ST
Return to 1. Since the sensor 30 has already detected the wire 1, the mode is determined to be the binding mode and the process proceeds to step ST8, and waits for the trigger 8 to be pulled (step ST9). If the trigger 8 is pulled (step ST10), after performing the normal binding process (step ST11), the process returns to step ST1 and proceeds to step ST9 to wait for the trigger 8 to be pulled again.

The detecting means B comprises the above-described sensor 31. The sensor 31 alone detects the loading mode, and the MPU detects that the tip of the wire 1 has reached a predetermined position.
10 may be fed back. FIG. 8 is a flowchart illustrating the operation mode of the binding machine at this time.

The loading mode is detected by the sensor 30 and the distance L from the sensor 30 to a predetermined position is determined.
Is previously registered in the memory, the MPU 10 operates the wire feeder 2, and the wire feed amount after the sensor 30 detects the wire and the distance L registered in the memory.
, The wire feeder 2 may be stopped when it is determined that the feed amount has become equal to or greater than the distance L. This eliminates the need to dispose the sensor 31. The flowchart explaining the operation mode of the binding machine at this time is as shown in FIG.

As described above, when the MPU is provided with the detecting means for detecting the loading mode, the MPU automatically recognizes the loading mode, and the leading end of the wire is pulled by a first pull operation after loading the wire. Since the loading process is performed to stop the wire feeder when the wire is sent out to the position, the binding with an incomplete length of wire is not performed without any special operation for the loading mode, resulting in incomplete binding. Can be prevented, and since it is not necessary to throw away the wire, wasteful consumption of the wire can be suppressed.

The above flowchart is an example showing the processing in the loading mode and the binding mode, and the processing in the loading mode is not limited to this flowchart.

[0036]

According to the first aspect of the present invention, when the trigger is pulled in the loading mode, the loading process is performed and the binding process is not performed, so that the wire is not bound by a half-length wire. Incomplete bundling can be prevented, and it is not necessary to throw away, so that wasteful consumption of wires can be suppressed.

According to the second aspect of the present invention, the loading mode is automatically recognized only by loading the wire, so that it is not necessary to perform a special operation for the loading mode every time a new wire is loaded. The loading process can be performed automatically by normal operation, and it is not necessary to tie with a half-length wire, and it is possible to prevent discarding and prevent incomplete tying, Useless consumption of wire can be suppressed.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a binding machine to which a discard prevention mechanism according to the present invention is applied.

FIG. 2 is a flowchart illustrating an operation mode of the binding machine.

FIG. 3 is a cross-sectional view of a main part of a binding machine to which a discarding prevention mechanism of another example is applied.

FIGS. 4A and 4B are cross-sectional views of a main part of a binding machine according to another example of the above.

FIG. 5 is a flowchart illustrating an operation mode of another example of a mechanism for preventing a discarding drive.

FIG. 6 is a cross-sectional view of a main part of a binding machine to which a discarding prevention mechanism according to still another example is applied.

FIG. 7 is a flowchart illustrating the operation of another example.

FIG. 8 is a flowchart for explaining an operation mode of still another example.

FIG. 9 is a flowchart illustrating the operation of another example.

FIG. 10 is a perspective view showing a use state of a conventional binding machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wire 2 Wire feeder 3 Guide arm 4 Twisting device 5 Cutting device 6 Microswitch 7 Reel 8 Trigger 9 Hook 20 Motor 21 Motor A Control means B Detecting means

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shuichi Ishii 6-6, Hakozakicho, Nihonbashi, Chuo-ku, Tokyo Inside Max Corporation (56) References JP-A-5-330507 (JP, A) -92103 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B65B 13/00-13/34 B65B 27/00-27/12

Claims (2)

(57) [Claims] 1. A wire feeder for feeding a wire for reinforcing bar binding, a guide arm for guiding the fed wire to loop around a rebar intersection, and one of a loop of the wound wire. In a binding machine equipped with a twisting device that grips and twists a portion and a cutting device that cuts a wire loop from an original wire, a loading process is performed during a loading mode in which the wire is newly loaded into the binding machine. And a control means for stopping the wire feeder when the tip of the wire is fed to a predetermined position. 2. The binding machine according to claim 1, further comprising: a detection unit configured to detect a loading mode, and based on a detection result of the detection unit, when the tip of the wire is fed to a predetermined position, the control device controls the wire feeding device. 2. A mechanism for preventing a wire from being thrown away in a binding machine according to claim 1, wherein a loading process for stopping the wire is performed.