JP2872648B2 - Coil binding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a coil binding machine. More specifically, for example, when a metal coil such as a strip coil is wound around with a metal band (hereinafter, referred to as a strap) and the ends thereof are bound by a seal fitting, the seal fitting is not supplied to an appropriate position. The present invention relates to a binding machine capable of detecting an abnormality.

[0002] The term "coil" used in the present specification is not limited to a strip coil, and is used to include all metal materials wound in a coil shape, such as a wire coil.

[0003]

2. Description of the Related Art Conventionally, for example, Japanese Patent Publication No. 6-41285 and Japanese Unexamined Patent Publication No.
As disclosed in Japanese Patent Application Laid-Open No. 300111, when a wire coil, a strip coil, or the like (hereinafter, referred to as a coil) is bound by a strap, the coil is wound around with the strap, and the ends of the strap are joined to each other.
In the joining method, usually, a piece (hereinafter, referred to as a seal fitting) made of a U-shaped iron plate is placed over the tips of the overlapping straps, and the seal fitting is firmly gripped by the opening and closing jaws of the binding machine. It is something to crush. A plurality of the seal fittings (for example, 25
Pieces) are housed in a superposed state (hereinafter, referred to as “ne-stack”) in a seal fitting case (hereinafter, referred to as “seal magazine”) of the binding machine. Each time the coil is wound around the strap, one seal fitting is sent by the pusher into the opening / closing jaw, which is an appropriate position for grasping the ends of the strap.

[0004] However, there is a possibility that an abnormality may occur in which the seal metal is not fed into the opening / closing jaw despite the fact that the seal metal that is nested in the seal magazine is supplied. This is an abnormal condition that can be considered when the seal metal is not properly stacked or when the seal metal is caught in the seal magazine.

[0005] In the event that such an abnormality occurs in the automatic driving operation, the coil will be transported in a state where it is not completely bound, causing various problems.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and it is an object of the present invention to provide a coil binding machine capable of reliably detecting when a seal is not fed into an opening / closing jaw. The purpose is.

[0007]

According to the present invention, there is provided a coil bundling machine for binding and fastening a superimposed portion between a vicinity of a tip of a strap wound around a coil and a succeeding portion with a seal fitting. A jaw for gripping the strap and joining the straps by deforming the seal fitting, a driving device for driving the jaw, and an output portion of the jaw and the driving device. A toggle mechanism to be coupled, a sensor for detecting any position from an output portion of the driving machine to a toggle mechanism when the jaw is driven via the toggle mechanism, and an output of the driving machine. At least a switching mechanism for switching between a low output and a high output for deforming the seal fitting is provided.

[0008] Therefore, despite the fact that the output is smaller than the high output for deforming the seal fitting, the sensor detects that the jaw has performed the seal fitting deforming operation, so that the seal fitting is not loaded. Abnormality can be detected.

The jaw and the output portion of the cylinder are configured so that the jaw can be opened and closed to grip the strap and deform the seal fitting. A toggle mechanism for connecting the barrel rod is provided, and when opening and closing the jaw by driving the toggle mechanism, a sensor for detecting any position from the displaced rod to the toggle mechanism is provided. In a binding machine having a switching mechanism for switching the pressure of the working fluid supplied to the cylinder to at least a low pressure and a high pressure for deforming a seal fitting, a small stroke operation of opening and closing the jaws is provided. Is driven by a long stroke of the rod of the fluid pressure cylinder via the toggle mechanism. It is also improved easy and detection accuracy placing a capacitor.

[0010] The sensor includes at least a first sensor for detecting the start of operation of the driving machine, a second sensor for detecting a position of a portion to be detected corresponding to the time of the low pressure, and a deformation of the seal fitting. And a third sensor for detecting the position of the portion to be detected at the time of high pressure.

The jaw and the electromagnetic clutch may be configured such that the jaw can be opened and closed to grip the strap and deform the seal fitting, and the drive unit includes an electric motor and an electromagnetic clutch. A toggle mechanism for connecting the output portion of the electromagnetic clutch is provided, and when the jaw is opened and closed by driving the first toggle mechanism, any position from the output portion of the electromagnetic clutch to the toggle mechanism which is displaced. And a switching mechanism for switching the power supplied to the electromagnetic clutch to at least low power and high power for deforming the seal fitting. As in the case of using a cylinder, the small stroke operation of opening and closing the jaw is controlled by the toggle mechanism to control the length of the output of the electromagnetic clutch. It is performed by driving the Rourke, also improved easy and detection accuracy can be especially installed a plurality of sensors such as a proximity switch.

[0012] The sensor includes at least a first sensor for detecting the start of operation of the driving machine at the time of the low power, and a second sensor for detecting a position of a test portion corresponding to the low power. And a third sensor for detecting the position of the test portion corresponding to the time of high power for the deformation of the seal fitting, and a clutch on the output side of the electromagnetic clutch as an output portion of the driving device. A screw rod that moves linearly by rotation can be provided. In this case, the toggle mechanism connects the screw rod and the jaw.

In addition, in the above binding machine, whether the driving device is a hydraulic type or an electric type, the toggle mechanism has a first toggle mechanism and a second toggle mechanism connected to an output portion of the first toggle mechanism. Is disposed, and a pair of jaw elements that open and close to each other are connected to an output portion of the second toggle mechanism, and the first, second, and third sensors are arranged along a linear displacement path of the output portion. Are sequentially arranged, a seal magazine for stacking seal fittings is provided, and a pusher for loading one seal fitting into the jaw from the seal magazine is provided. In this case, it is possible to effectively prevent insufficient binding by simply applying the conventional binding machine as it is and newly adding a plurality of sensors.

The sensor in the claims may be, for example, a known proximity switch. The part to be tested is any part from the output part of the driving machine to the toggle mechanism, and is a part that can approach and separate from the proximity switch. For example, a tip of a rod of a fluid pressure cylinder, a tip of a threaded rod provided in an electromagnetic clutch, or a member of a toggle mechanism connected to an output part such as a rod or a threaded rod.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a binding machine according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a schematic view showing a binding head in an embodiment of the binding machine of the present invention, FIG. 2 is a plan sectional view of the binding head of FIG. 1, FIG. 3 is a side sectional view of the binding head of FIG. 4 is a perspective view showing an example of a seal fitting for joining the strap, FIG. 5 is a schematic view showing the operation of the binding head of FIG. 1, and FIG.
7 is a perspective view showing an example of a jaw in the binding head of FIG. 1, FIGS. 7A to 7F are schematic views showing a strap joining operation by the jaw of FIG. 6, and FIG. 8 is a pneumatic cylinder of the binding head of the present invention. 9 (a) to 9 (e) are explanatory diagrams showing the operation of a sensor accompanying the operation of the binding machine shown in FIG. 1, and FIG.
FIG. 4 is a side sectional view showing a main part of another embodiment of the binding machine of the present invention.

The binding head 1 of the binding machine shown in FIG.
The strap S extends over the inner and outer diameter sides of the coil C.
After that, the front end St of the strap S is grasped and the subsequent portion is tightened. Reference numeral 2 denotes a forward / reverse rotatable drive roller for sending out and pulling back the strap S.

Reference numeral 3 denotes a jaw. As is apparent from FIGS. 2 and 3, the pair of jaw elements 4 are configured to be opened and closed by a pneumatic cylinder 5 via toggle mechanisms 11 and 13. It is a thing. The pneumatic cylinder 5 includes a two-stage large-diameter cylinder 5b and a one-stage small-diameter cylinder 5b.
c. The piston of the two-stage large-diameter cylinder 5b and the piston of the small-diameter cylinder 5c are separated.

Reference numeral 6 denotes a seal magazine, in which a large number of seal fittings P are housed in a nested state. This seal fitting P is for joining the ends of the looped strap S to each other, and an example thereof is a substantially U-shaped iron plate as shown in FIG. Is formed from. The nested seal fittings P are pushed leftward in the figure by a helical spring (not shown), and are loaded one by one into the lower jaws 3 by pushers 7.

The above-mentioned seal fitting P has a state in which the overlapping ends of the straps S are inside the U-shape.
The jaws 3 hold the overlapping portion of the strap S by being grasped from both outer sides and deformed as shown by a two-dot chain line in FIG.

Reference numeral 8 denotes a sensor described later, which is provided to detect the position of the rod 5a of the pneumatic cylinder 5. In this embodiment, three sensors are provided.

9 is a cutter for finally cutting the succeeding strap S.

The binding operation of the coil by the binding device will be described with reference to FIG. FIG. 5 shows a case where the outer periphery of the coil C is bound as an example.

As shown in FIG. 5A, the strap S is caused to pass through the strap passage of the binding head 1 and then around the outer circumference of the coil C. Then, the leading end St of the strap S reaches the binding head 1 again. Let Then, only the leading end St of the strap is gripped by the binding head 1 (the trailing portion is not gripped).

Next, as shown in FIG. 5B, the binding head 1 is moved closer to the coil C while the strap S is tightened by the tightening device body.

Next, as shown in FIG. 5 (c), the grip portion G of the strap is tightly bound, and the subsequent portion of the strap S is cut (hereinafter referred to as a seal cut).

Next, the jaw 3 and its driving mechanism will be described in detail with reference to FIG. 1, FIG. 2, FIG. 3, and FIG.

The jaw 3 is of a known type. The pair of jaw elements 4 for joining the strap by swinging and closing each other to grip the strap and grasp and deform the seal fitting P, and a subsequent strap are connected to each other. And the cutter 9 for cutting.
The cutter 9 includes a fixed blade 9a and a movable blade 9b.

As shown in FIGS. 2 and 6, each of the jaw elements 4 has a claw portion 4a at a distal end portion, and an intermediate portion is pivotally supported by the binding head 1 by a pivot shaft 10.
The rear end is connected to the drive rod 12 by a second toggle link 11. The drive rod 12 is connected to the rod 5a of the drive cylinder 5 via the first toggle link 13, as is apparent from FIGS.
The first toggle link 13 is such that only one support shaft 14 pivotally supports the link member 13a to the binding head 1.
The other support shafts 15, 16 and 17 are respectively connected to the link members 13
b and the rod 5a, the link members 13a and 13c, and the link member 13c and the drive rod 12 are swingably connected.

When the rod 5a is extended upward, the drive rod 12 is pushed to the left in the drawing to close the pair of jaw elements 3, and when the rod 5a contracts downward, the drive rod is pulled to the right. The jaw element 4 is opened. Reference numeral 18 in FIGS. 2 and 3 denotes a pin for guiding the jaw 3 to reciprocate.

Next, referring to FIG.
The operation of will be described.

FIGS. 7 (a) and 7 (b) are a plan view and a side sectional view, respectively, in a state where the strap is not gripped. The rod 5a contracts and the drive rod 12 retreats rightward in the figure. In this state, the jaw 3 is released. The binding head 1 shown in FIGS. 2 and 3 is also in this state. One seal fitting P is pushed into the jaw 3 by the pusher 7.
Is loaded.

FIGS. 7 (c) and 7 (d) are a plan view and a side sectional view, respectively, in a state where only the tip St of the strap is gripped. In this state, a portion near the tip St of the strap is gripped between the lower portion of the claw portion 4a and the grip member 19 (in the present embodiment, formed integrally with the fixed blade 9a). The jaws 3 are not closed enough to deform the seal fitting P and fasten the strap S.

FIGS. 7 (e) and 7 (f) are a plan view and a side sectional view, respectively, in a state where the strap is fastened and the subsequent strap is cut. The jaw 3 approaches the outer peripheral surface of the coil while tightening the portion of the succeeding strap S, and by completely closing the jaw 3, the sealing metal P is crimped on the tip side of the strap and the succeeding portion superimposed thereon. Fixed by that. FIG. 8 also shows this state. Next, the movable blade 9b moves and the subsequent strap S is cut off between the movable blade 9b and the fixed blade 9a.

The operations from FIG. 7A to FIG. 7F are performed continuously.

In the present embodiment, the following configuration is provided to determine whether or not the seal fitting P is normally inserted into the jaw 3. The pneumatic cylinder 5 is driven by first applying low-pressure air (1.0 to 1.5 kg) to the small-diameter cylinder 5c.
/ Cm ² range). At this time, if the seal fitting P is normally inserted in the jaw 3, the jaw element 4
However, the rod 5a of the cylinder 5 can no longer move with the low-pressure air because of the contact with the seal fitting P. Thereby, it can be seen that the seal fitting P is normally inserted into the jaw 3. For this determination, the stroke of the small-diameter cylinder 5c is made larger than the stroke of the rod 5a from the operation start point until the jaw element 4 comes into contact with the seal fitting P. Therefore, if there is an abnormal insertion of the seal fitting P (not properly inserted), the small-diameter cylinder 5c is fully stroked, so it can be understood. As described above, the three sensors 8a, 8b, and 8c are provided to determine whether the seal fitting P is normal or abnormal based on the position of the rod 5a of the cylinder 5 (see FIGS. 1 and 3). .

If the insertion of the seal fitting P is abnormal, an alarm and / or operation stop is performed.

When the charging of the seal fitting P is normal, the pressure of the working air is switched to a high pressure in the range of 4 to 6 kg / cm ² and injected into the large-diameter cylinder 5b, and the fastening operation of the strap S is continued. In order for the jaw 3 to deform the seal fitting P and fasten the strap S, 2.5 kg is applied to the cylinder.
This is because a driving pressure of / cm ² or more is required.

For the above operation, a working air switching valve 21 and a pressure reducing valve 22 are provided on a working air supply line 20 to the pneumatic cylinder 5 as shown in FIG. The supply pressure of the working air in the working air supply line 20 (hereinafter referred to as an original pressure) is 4 to 6 kg / cm ² .

In the excited state shown in FIG.
1 supplies the original pressure as it is to the pneumatic cylinder 5 to extend the rod 5a to the final stage. In the switched non-excited state, the operating air passes through the pressure reducing valve 22 and is 1.0 to 1.5 kg /
The pressure is reduced to cm ² .

Reference numeral 23 denotes a discharge valve on the extension side, which discharges working air when the rod 5a is contracted. Reference numeral 24 denotes a discharge valve on the contracting side of the rod. When the rod 5a is contracted, working air of the original pressure (4 to 6 kg / cm ² ) is supplied to the contracting side of the pneumatic cylinder 5, and is switched when the rod 5a is extended. The working air is released to the silencer 25.

On the other hand, in the present embodiment, a known proximity switch is employed as the sensor 8, and as shown in FIGS. 1 and 3, three sensors 8 are provided along the direction of expansion and contraction of the rod 5a.
a, 8b, 8c. Before the operation of the cylinder 5 starts, that is, in a contracted state of the rod 5a, none of the sensors operates. The sensor 8a at the lowermost position detects that the operation of the cylinder 5 has started, and the rod 5a is in a contracted state (FIGS. 3, 5A and 7A).
(b)) When it moves slightly upward from (b)), this is detected. The sensor 8b at the intermediate position detects the rod 5a when the small-diameter cylinder 5c makes a full stroke. The sensor 8c at the uppermost position is a state where the rod 5a is extended to the final stage to deform the seal fitting P (FIG. 5 (c),
7 (e) and 7 (f)).

Therefore, each of the sensors 8a, 8b, 8
c emits a signal at each position of the rod 5a as shown in Table 1. In the table, a circle indicates a position where each sensor emits a detection signal, and a cross indicates a position where no detection signal is emitted. Each sensor 8a, 8
If b and 8c operate as shown in Table 1, it means that the binding machine is operating normally.

[0044]

[Table 1]

As shown in FIG. 9 (see also Table 1),
Before the start of operation, none of the above-mentioned sensors 8a, 8b, 8c operates (FIG. 9 (a)). When the operation is started, the switching valve 21 is de-energized, and working air in the range of 1.0 to 1.5 kg / cm ² is supplied to the small-diameter cylinder 5c of the pneumatic cylinder 5, and the small-diameter cylinder 5c is operated to move the rod 5
a rises, the lowermost sensor 8a operates (FIG. 9).
(C)). However, if a signal is continuously transmitted from the middle sensor 8b (FIG. 9B), it is determined that the small-diameter cylinder 5c is in an abnormal state in which the full-stroke has occurred and the seal fitting P is not inserted, and an alarm is issued. Then, the coiling operation of the binding machine is stopped. That is, an alarm and / or stop is performed in a situation different from the transmission of the predetermined sensor shown in Table 1.

On the other hand, when the operating air pressure is 1.0 to 1.5 kg /
If the signal is not transmitted from the sensor 8b in the middle stage at the time of cm ² (FIG. 9 (c)), it is determined that the seal fitting P is normally inserted, and the operation is continued. That is, the operating air pressure is raised to the original pressure (4 to 6 kg / cm ² ) by the operating air switching valve 21 shown in FIG. 8 and then injected into the large-diameter cylinder 5b (at the same time, injected into the small-diameter cylinder 5c). The piping shown in FIG. 8 may be changed).
Then, the rod 5a of the cylinder 5 moves continuously until the jaw 3 deforms the seal fitting and fastens the strap, and signals are issued from both the middle sensor 8b and the uppermost sensor 8c (FIG. 9 (d)). ) And FIG.
(E)).

Instead of using the pressure reducing valve 23, it is also possible to use a pneumatic cylinder in which two cylinders having pistons having different pressure receiving areas are connected in series while the supply pressure of the working air is kept constant. The same effect as the binding machine of the embodiment can be obtained. That is, the different piston side is used for the first-stage extension operation (low-pressure operation in the above-described embodiment) and the final extension operation (high-pressure operation in the above-described embodiment) of the rod 5a for determining whether the seal fitting is normally inserted or abnormal. A switching valve may be provided so as to supply the working air to each.

Further, a single cylinder may be provided. That is, low-pressure operating air is supplied to a single cylinder at the start of operation, and high-pressure operating air is supplied after it is determined that the cylinder is normal.

Further, irrespective of the number and the number of cylinders, only a single sensor (installed above the position corresponding to 8b) may be provided instead of a plurality. That is, if the sensor operates when the low-pressure operating air is supplied and activated, it is determined that an abnormality has occurred, the alarm is activated, and the device is stopped. The operation is continued.

In the present embodiment, the pneumatic cylinder 5 is employed as the driving means of the jaw 3, but a driving machine having an electric motor 26 and an electromagnetic clutch 27 may be used as shown in FIG.

On the output side of the electromagnetic clutch 27, there is provided a screw rod 28 which can move linearly by the rotation of the electromagnetic clutch, and this screw rod 28 plays the same role as the rod 5a. The electromagnetic clutch 27 is configured to be able to apply, for example, a two-step voltage by increasing or decreasing the electric resistance, so that the clutch suction force can be switched in two steps. In addition, the electric motor 26 is
6a, a sufficient thrust on the screw rod 28, that is, the original pressure (4-6 kg / cm
It is configured such that a thrust equal to or greater than the thrust of the rod 5a when ² ) is applied is generated.

By interposing the electromagnetic clutch 27, the suction force is first reduced to, for example, 150 to 2
The operating pressure of the pneumatic cylinder is 25 kg.
A thrust corresponding to 0 to 1.5 kg / cm ² is transmitted, and when the load exceeds that, the clutch slips. Next, if the suction force is, for example, 375 to 450 kg, a thrust corresponding to the operating pressure of the pneumatic cylinder of 2.5 to 3.0 kg / cm ² is transmitted, and the seal fitting P can be deformed.

If this driving means is also combined with the sensor 8, it is possible to prevent binding when the seal fitting P is not loaded.

Further, such an electric motor and an electromagnetic clutch may be combined with a pneumatic cylinder in series.

[0055]

According to the present invention, when the seal fitting for joining the strap is not sent to the predetermined position, it is reliably detected, and the coil is conveyed in an insufficiently bound state. Abnormalities can be prevented beforehand. This is also possible with a simple configuration in which a known sensor is simply attached.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a binding head in an embodiment of a binding machine of the present invention.

FIG. 2 is a plan sectional view of the binding head of FIG. 1;

FIG. 3 is a side sectional view of the binding head of FIG. 1;

FIG. 4 is a perspective view showing an example of a seal fitting for joining a strap.

FIG. 5 is a schematic view showing the operation of the binding head of FIG. 1;

FIG. 6 is a perspective view showing an example of a jaw in the binding head of FIG. 1;

7 (a) to 7 (f) are schematic views showing a strap joining operation by the jaws of FIG. 6;

FIG. 8 is a schematic view showing one embodiment of a working air switching mechanism of a pneumatic cylinder in the binding head of the present invention.

FIGS. 9 (a) to 9 (e) are explanatory views showing the operation of a sensor accompanying the operation of the binding machine of FIG. 1.

FIG. 10 is a side sectional view showing a main part of another embodiment of the binding machine of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Binding head 3 ... Jaw 5 ... Pneumatic cylinder 5a ... Rod 6 ... Seal magazine 7 ... Pusher 8 ... Sensor 9 ... Cutter 11 ... First toggle link DESCRIPTION OF SYMBOLS 12 ... Drive rod 13 ... 2nd toggle link 19 ... Grip part 21 ... Working air switching valve 22 ... Pressure reducing valve 26 ... Electric motor 27 ... Electromagnetic clutch 28 ... Screw bar C: Coil S: Strap P: Seal fitting

Claims (6)

(57) [Claims] 1. A coil bundling machine for gripping and fastening a superimposed portion of a vicinity of a tip of a strap wound around a coil and a succeeding portion with a seal fitting, wherein the strap is gripped and the seal fitting is held. A jaw for joining the straps by deforming the
A driving device for driving the jaw, a toggle mechanism for connecting the jaw and an output portion of the driving device, and a driving mechanism for driving the jaw through the toggle mechanism, the output portion of the driving device being displaced to the toggle mechanism. It is characterized by comprising a sensor for detecting any position up to and including a switching mechanism for switching the output of the driving machine at least between a low output and a high output for deforming a seal fitting. Coil binding machine. 2. The jaw and an output portion of the cylinder, wherein the jaw is configured to be able to open and close to grip the strap and deform the seal fitting, and the driving machine is constituted by a hydraulic cylinder. A toggle mechanism for connecting the barrel rod is provided, and when opening and closing the jaw by driving the toggle mechanism, a sensor for detecting any position from the displaced rod to the toggle mechanism is provided. 2. The coil bundling machine according to claim 1, further comprising: a switching mechanism for switching a pressure of the working fluid supplied to the cylinder to at least a low pressure and a high pressure for deforming a seal fitting. 3. The sensor according to claim 1, wherein the sensor includes at least a first sensor for detecting an operation start of the driving device, a second sensor for detecting a position of a test target corresponding to the low pressure, and the seal. 3. The coil bundling machine according to claim 2, further comprising a third sensor for detecting a position of the portion to be inspected corresponding to a time of high pressure for deformation of the bracket. 4. The jaw and the electromagnetic clutch, wherein the jaw is opened and closed so that the jaw can grip the strap and deform the seal fitting, and the drive unit comprises an electric motor and an electromagnetic clutch. A toggle mechanism for connecting the output portion of the electromagnetic clutch is provided, and when the jaw is opened and closed by driving the first toggle mechanism, any position from the output portion of the electromagnetic clutch to the toggle mechanism which is displaced. The coil bundling machine according to claim 1, further comprising a sensor for detecting the electric current, and a switching mechanism for switching the power supplied to the electromagnetic clutch to at least a low power and a high power for deforming the seal fitting. 5. The sensor according to claim 1, wherein the first sensor detects a start of operation of the driving device at the time of the low power, and a second sensor detects a position of a test portion corresponding to the low power. A third sensor for detecting the position of the test portion corresponding to the time of high power for the deformation of the seal fitting, and a screw rod that moves linearly by rotation of the clutch on the output side of the electromagnetic clutch. The coil bundling machine according to claim 4, which is provided as an output unit, and wherein the toggle mechanism connects the screw bar and the jaw. 6. The toggle mechanism includes a first toggle mechanism and a second toggle mechanism connected to an output of the first toggle mechanism, and the two toggle mechanisms open and close to each other at an output of the second toggle mechanism. A pair of jaw elements are connected, the first, second and third sensors are sequentially arranged along a linear displacement path of the output section, and a seal magazine for stacking seal fittings. The coil bundling machine according to any one of claims 3 to 5, further comprising: a pusher for loading one seal fitting from the seal magazine into the jaw. .