JPH11310204A - Tape guide mechanism of bundling machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tape guide mechanism which can be made compact. SOLUTION: A pair of guide passage forming members 7, 8, which can move toward and apart from each other from the opposite sides in the width direction of a tape T, is provided. Since each of the members 7, 8 supports only the vicinity of the end of the tape T in the width direction thereof, the total stroke of the members 7, 8 can be reduced. Hence the members 7, 8 can be made compact and the stroke thereof can be reduced so that the tape guide mechanism can be made smaller. Moreover a bundling machine can be made compact.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION A tape guide mechanism which is applied to a binding machine which forms a loop by a tape and binds a material to be bound by tightening the loop, and guides a tape running to form the loop.

[0002]

2. Description of the Related Art Conventionally, as a small binding device for binding bills or the like, a binding tape having at least one surface which is heat-adhesive is wound around a material to be bound, and an outer surface of a winding start portion and a winding end portion are wound. Polymerized with the inner surface of
There is provided a device for binding an object to be bound by pressing a heating press portion heated by a heater and thermally fusing the polymerized portion with a thermoplastic resin applied to a tape.

[0003] In this binding device, the tape fed out from the opposite side of the winding is run along an arch-shaped guide path,
After forming a loop of the tape along the guide path, the loop is narrowed to bind the objects to be bound arranged in the loop.

[0004]

The guide member for guiding the inner surface of the loop in the guide path supports and guides the inner surface of the loop when the loop is formed, while reducing the diameter of the loop by tightening the tape. Must be evacuated from the tape.

Therefore, in the conventional tape guide mechanism, a guide member is disposed only on one side in the width direction of the tape,
The guide member is moved to a guide position for guiding the tape which advances to the tape side and travels when forming the loop, and a retracting position for retracting from the tape to allow the tape to be tightened when the loop diameter is reduced.

However, in order to stably guide the running of the tape with a single guide member, the guide member needs to advance and support at least half the width of the tape.

For this reason, the guide member becomes large,
In addition, the stroke amount of the guide member moving forward and backward becomes very large. As a result, there has been a problem that the tape guide mechanism becomes very large, and consequently the binding machine becomes large.

The present invention has been made in view of the above problems, and has as its object to provide a tape guide mechanism of a binding machine which can be downsized.

[0009]

Means for Solving the Problems As means for solving the problems to achieve the above object, the aspect of the invention described in claim 1 is as follows.
In a binding machine that forms a loop with a tape and binds the objects to be bound by tightening the loop, a tape guide mechanism having a guide path that guides the tape traveling for forming the loop is provided on both sides in the width direction of the tape. The support member supports the tape so as to be able to advance and retreat in the width direction of the tape. A pair of displaceable guide path forming members and a drive mechanism for driving the guide path forming member between a guiding posture and a retracting posture are provided.

In the conventional case in which a single guide member supports the running of the tape, the guide member must be extended to at least half (preferably substantially the entire width) of the tape width and supported, so that a large-sized guide member is required. A guide member is required, and the stroke of the advance and retreat is long.

On the other hand, in the present aspect, since both sides of the tape are supported by the pair of guide path forming members, the entire tape can be stably supported only by supporting the vicinity of both edges of the tape. it can. Therefore, each guide path forming member can be reduced in size, and the total amount of the forward and backward strokes of both guide path forming members can be shorter than the conventional forward and backward stroke of a single guide member.

According to a second aspect of the present invention, in the first aspect, the driving mechanism includes a first driving mechanism that collectively drives first ends of the pair of guide path forming members that correspond to each other. And a second drive mechanism for driving the corresponding second ends collectively.

In order to smoothly displace the guide path forming member, it is necessary to drive at least a pair of ends. If each guide path forming member is to be individually driven, it is necessary to provide at least four drive mechanisms. is there. On the other hand, in this aspect, since each set of corresponding end portions of both guide path forming members is driven collectively by each drive mechanism, a pair of drive mechanisms can be used, and the drive mechanism can be simplified. Can be.

According to a third aspect of the present invention, in the second aspect, each of the first and second driving mechanisms includes a movable member driven by a driving unit in a direction intersecting a displacement direction of the guide path forming member. And a conversion mechanism for converting the displacement of the movable member into the displacement of both guide path forming members.

In this aspect, the driving direction of the movable member by the driving means intersects with the advancing and retreating direction of each guide path forming member, so that the degree of freedom of arrangement of the driving means is increased and the size of the driving means can be further reduced. As the above-described driving means, a hydraulic cylinder that reciprocates the movable member is preferable because it is small and can secure a sufficiently large driving force.

According to a fourth aspect of the present invention, in the third aspect, the conversion mechanism is formed in a pair of guide grooves formed in the movable member, and in each of the guide path forming members. And a groove follower mechanism including a cam follower guided by the cam surface.

In the case of the groove cam mechanism, the guide path forming member works both forward and backward, so that the operation of the guide path forming member is assured.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, each of the guide path forming members has a pair of flanges for guiding an outer surface and an inner surface of the tape forming a loop. An outer fixed guide member comprising a groove-shaped member that opens toward the tape side, is immovably disposed between the pair of guide path forming members, and guides a widthwise central portion of an outer surface of the tape forming a loop. Is further provided.

In this embodiment, by using the pair of groove-shaped members, the inner surface, the outer surface, and the edge of the running tape can be respectively guided, and the running tape can be guided stably. Further, by using the fixed outer guide member, the tape can be stably supported even if the groove depth of the groove member is reduced. As a result, further miniaturization of the guide mechanism can be achieved through miniaturization of the channel-shaped member.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows a main part of a binding machine including a tape guide mechanism according to a first embodiment of the present invention. Referring to FIG. 1, the present binding machine is of a type in which a loop is formed by a tape and the binding object is bound by tightening the loop, and the binding object is placed on the upper surface of machine frame 1 of the binding machine. A table 2 for placing the tape is formed, and a groove 3 as a tape passage is formed in the table 2.

The tape guide mechanism 4 is disposed above the machine frame 1 and is supported by the machine frame 1. Tape guide mechanism 4
Has a front fixed plate 5 and a rear fixed plate 6 fixed to the machine frame 1.

The front and rear fixing plates 5, 6 define a front guide path forming member 7, a fixed guide member 8, and a rear guide path 10 for defining a guide path 10 for guiding a tape running for forming a loop. The guide path forming member 9 is supported via a support shaft described later. Both guide path forming members 7 and 9 are symmetrical, and are formed by groove-shaped members that open toward the tape side. As shown in FIG. 2A, the groove-shaped members forming the guide path forming members 7 and 9 include an upper flange 11 and a lower flange 12 for guiding an outer surface and an inner surface of the tape T forming a loop, respectively, and both flanges. And a web 13 connecting the first and second parts 11 and 12 to each other. The web 13 regulates the position of the running tape in the width direction. The fixed guide member 8 is immovably disposed between the pair of guide path forming members 7 and 9 and guides the center portion in the width direction of the outer surface of the tape forming a loop.

Each of the guide path forming members 7 and 9 slides in the width direction of the tape T (the front-back direction in the present embodiment) to guide the tape T running at the time of forming a loop as shown in FIG. 2B, and can be displaced between a retracted posture in which the tape T is retracted to allow the tape T to be tightened when the loop diameter is reduced, as shown in FIG. 2B.

Referring again to FIG. 1, a pair of hydraulic cylinders 14 are fixed above the table 2 as drive mechanisms fixed to the machine frame 1 to advance and retract the front and rear guide path forming members 7, 9, respectively. , 14 (for the rear drive mechanism, only one hydraulic cylinder 14 is shown). The tape introduction side end 15 of each of the guide path forming members 7 and 9 is inclined so as to enter below the discharge side end 16. Further, the discharge side end 17 of the fixed guide member 8 is bent upward so as to separate the tape upward from the discharge side end 16 of both the guide path forming members 7 and 9.

Below the table 2, there is provided a tape running mechanism 20 for feeding and pulling back the tape T. The tape running mechanism 20 has a delivery roller 18 composed of a rubber roller and a binding roller 19.
The delivery roller 18 is driven and controlled so as to rotate forward (clockwise). When the delivery roller 18 delivers the tape T of the rewinding portion (not shown) toward the introduction-side ends 15 of both the guide path forming members 7 and 9, used. The driving of the binding roller 19 is controlled so as to rotate in the reverse direction (counterclockwise rotation) with respect to the delivery roller 18.

Directly above the delivery roller 18 and the bundling roller 19, driven rollers 21 and 22 made of metal are arranged, respectively. These driven rollers 21 and 22 are supported by the side plate of the binding machine main body 1 so as to alternately contact the corresponding delivery roller 18 and binding roller 19. That is, when sending out the tape T at the rewinding portion, the sending roller 18 and the driven roller 21 come into contact with each other (at this time, the driven roller 22 is separated from the binding roller 19), and the tape T is moved around the material to be bound. When tightening and binding,
Contrary to the above state, the binding roller 19 and the driven roller 22 come into contact with each other, and the delivery roller 18 and the driven roller 2
1 will be separated from each other.

Other mechanisms provided in the binding machine include:
Referring to FIG. 4, a receiving plate 23 that can move forward and backward and receives the lower surface of the object to be bound, and a first portion that clamps a portion separated from the leading end of tape T by a predetermined distance between the lower surface of receiving plate 23.
A clamp member 24, a second clamp member 25 for clamping between the winding end of the tape T superimposed on the leading end of the tape T and the lower surface of the receiving plate 23, and a tape T between the two clamp members 24, 25. A heating press section 26 for heating and pressing the overlapped portion, a cutter 27 elastically supported by the heating press section 26 and cutting the heat-sealed tape T are arranged.

Next, a more detailed description will be given with reference to the exploded perspective view of FIG. The two guide path forming members 7, 9 and the fixed guide member 8 are penetrated by a plurality of support shafts 28, 29, 30. The support shafts 28 and 29 are provided with both guide path forming members 7 and 9
The support shaft 30 is disposed corresponding to the upper part of the center between the left and right ends. Both ends of the support shafts 28, 29, 30 are supported by the front fixed plate 5 and the rear fixed plate 6 via receiving members 31, respectively. The receiving member 31 includes a boss 32 through which the support shafts 28, 29, and 30 are inserted, and an annular flange 33 formed integrally with one end of the boss 32 and screwed to the front fixed plate 5 and the rear fixed plate 6. Have. The tip of a set screw 34 that passes through the annular flange 33 in the radial direction is
Each support shaft 28, 29, 30 is fixed by pressing the support shaft 9, 30.

Reference numeral 35 denotes a bearing member which is axially slidably fitted to an intermediate portion of the support shafts 28 and 29 in the axial direction. The bearing member 35 is formed of a bush, and one end of the bush is provided with a corresponding guide path. An annular flange 36 for screwing to the forming members 7, 9 is formed integrally. Each of the guide path forming members 7, 9 can be displaced between the above-described guide posture and the retracted posture by sliding in the axial direction of the support shafts 28, 29, 30. The bush end faces of the pair of bearing members 35, 35 facing the support shafts 28, 29 in the axial direction abut on the front and rear faces of the fixed guide member 8, thereby positioning the two guide path forming members 7, 9 in the guiding posture. Is stipulated.

Each hydraulic cylinder 14 is fixed to the machine frame 1 via a bracket 37. An adapter screw 38 fixed to the tip of the rod of each hydraulic cylinder 14 is fixed to the corresponding guide path forming members 7 and 9.

Reference numerals 39 and 40 denote a pair of tape guides which are arranged below the table 2 and have a constant interval therebetween. These tape guides 39 and 40 are guides for guiding the running of the tape T from the unwinding portion of the tape T (not shown) to the present tape guide mechanism 4, and are formed by groove-shaped members that open toward the tape. 41 is a tape detection sensor for detecting the end of the tape T. Reference numerals 42 and 43 are receiving bars formed integrally with a screw member for fixing the tape guides 39 and 40 to the machine frame 1 and receiving the leading end of the tape T.

Reference numeral 44 denotes a clamp bar on which urethane claws 45 are arranged. The clamp bar 44 is fixed to the tip of a swing arm 47 that is swingably supported around a support shaft 46. When the swing arm 47 is swung by the hydraulic cylinder 48, the tape T is received by the receiving plate 23 (see FIG. 4).
Is clamped between the lower surface of the device.

Numerals 49 and 50 are L-shaped plates for regulating the positions of the two guide path forming members 7 and 9 which are in the retracted position while being screwed to the left and right ends of the fixed guide member 8, respectively. .

Next, the binding operation will be described with reference to FIGS.
This will be described with reference to FIG. First, as shown in FIG. 4A, the object A to be tied is placed on the upper surface of the receiving plate 23 that has advanced into the groove.
Is placed.

Next, as shown in FIG. 4B, the tape T is sent out by the sending roller 18 and the driven roller 21, and the front and rear guide paths in the guiding posture shown in FIG. It is sent along a guide path 10 defined by the forming members 7, 9.

Next, as shown in FIG. 4C, a loop L of the tape T is formed along the guide path 10, and
The portion of the tape T that is separated from the leading end by a predetermined distance is clamped and stopped between the lower surface of the receiving plate 23 and the advanced first clamp member 24.

Next, the guide path forming members 7, 9 widen the interval between each other and retreat to the retracted position shown in FIG. 2B, and as shown in FIG. As a result, the tape T is pulled back to reduce the loop diameter. After the tape T is reduced, the leading end of the tape T and the winding end of the tape T are overlapped as shown in FIG. After being clamped between the members 25, the heating press part 26 with the cutter 27 is raised.

The heated pressing portion 26 is heated between the clamp members 24 and 25 while pressing the overlapped portion Ta of the tape T against the lower surface of the receiving plate 23 to heat and bond the overlapped portion. The tape T is cut, and after cutting,
As shown in FIG. 4F, the heating pressure unit 26 descends. Thereafter, the receiving plate 23 is retracted, and the binding is completed. According to the present embodiment, since both sides in the width direction of the tape T are supported by the pair of guide path forming members 7 and 9, the entire tape T is stabilized only by supporting the vicinity of both edges of the tape T. Can be supported. Therefore, each of the guide path forming members 7, 9 can be reduced in size, and the total amount of the forward and backward strokes of the two guide path forming members 7, 9 is larger than that of the conventional single guide member. Can also be shortened. As a result, a small-sized tape guide mechanism 4 can be achieved, and the size of the binding machine can be reduced.

Further, since the inner surface, the outer surface and the edge of the running tape T can be guided by using the groove-shaped members as the guide path forming members 7 and 9, the guide can be stably guided. In addition, by using the outer guide member 8 that is fixedly arranged, the guide path forming members 7 and 9 formed of groove members can be further reduced in size, and as a result, the tape guide mechanism 4 can be further reduced in size.

FIGS. 5 to 8 show another embodiment of the present invention. Referring to FIG. 5, in the present embodiment, in tape guide mechanism 4A, left ends 7a, 9a as first ends of a pair of guide path forming members 7, 9 corresponding to each other are collectively driven. A first drive mechanism 51 and a second drive mechanism 52 for collectively driving right ends 7b and 9b as second ends of the pair of guide path forming members 7 and 9 corresponding to each other.
And provided.

Each of the drive mechanisms 51 and 52 respectively intersects with the direction of displacement of the guide path forming members 7 and 9 (the front-back direction in the present embodiment, the direction orthogonal to the plane of FIG. 5). The movable member 53 includes a movable member 53 that can be displaced in the vertical direction (in the vertical direction in the embodiment), a hydraulic cylinder 54 that drives the movable member 53, and a conversion mechanism 55 that converts the displacement of the movable member 53 into the displacement of both guide path forming members. .

Referring to FIG. 6, movable member 53 has a pair of vertically extending long holes 56 and 57 arranged vertically.
The shafts 58, 57 fixed to the machine frame 1 are inserted into these long holes 56, 57.
59, the movable member 53 is allowed to move only in the vertical direction. The distal end of the rod 54 a of the hydraulic cylinder 54 is fixed to the lower end of the movable member 53 by a mounting plate 60 and a mounting screw 61. The movable member 53 has a pair of guide grooves 6.
The cam followers 64 and 65 provided at the ends of the corresponding guide path forming members 7 and 9 are inserted into the guide grooves 62 and 63, respectively. The cam followers 64 and 65 are formed of rollers that are supported at the ends of the guide path forming members 7 and 9, and correspond to the corresponding guide grooves 62 and 6.
The cam surface formed of the inner surface of No. 3 can smoothly roll.

The distance between the pair of guide grooves 62 and 63 becomes narrower downward. Therefore, as shown in FIG.
Is raised, the two guide path forming members 7 and 9 approach each other, and assume a guiding posture for guiding the running of the tape T. Conversely, as shown in FIG. 8, when the movable member 53 is lowered by the hydraulic cylinder 54, the two guide path forming members 7 and 9 move away from each other, and assume a retracted posture allowing the diameter of the loop to be reduced. The pair of guide grooves 62 and 63 and each guide groove 6
A conversion mechanism 55 composed of a grooved cam mechanism is constituted by the cam followers 64, 65 guided by the guides 2, 63. 7 and 8 show only the second drive mechanism 52, the same applies to the first drive mechanism 51.

According to the present embodiment, each drive mechanism 51,
By 52, the pair of corresponding end portions of both guide path forming members 7 and 9 are driven collectively, so that only one pair of drive mechanisms is required, and the drive mechanism can be simplified.

A hydraulic cylinder 54 as a driving means is provided.
The driving direction of the movable member 53 (vertical direction in the present embodiment) can intersect with the advancing / retreating direction (front-back direction in the present embodiment) of each of the guide path forming members 7 and 9. , 52 can be arranged more freely, and can be made smaller. Further, it is only necessary to provide a pair of relatively expensive hydraulic cylinders, so that the structure can be simplified and the manufacturing cost can be reduced.

In particular, since the groove cam mechanism is used as the conversion mechanism 55, the operation of the guide path forming members 7, 9 is assured.

The present invention is not limited to the above embodiments, and various changes can be made within the scope of the present invention.

[0049]

According to the first aspect of the present invention, since both sides of the tape are supported by the pair of guide path forming members, the entire tape can be stably supported only by supporting the vicinity of both edges of the tape. Can be. Therefore, each guide path forming member can be reduced in size, and the total amount of the forward and backward strokes of both guide path forming members can be shorter than the conventional forward and backward stroke of a single guide member. As a result, a small-sized tape guiding mechanism can be achieved, and the size of the binding machine can be reduced.

According to the second aspect of the present invention, the sets of the corresponding end portions of the two guide path forming members are collectively driven by each driving mechanism, so that only one pair of driving mechanisms is required, and the driving mechanism is simplified. can do.

According to the third aspect of the present invention, the driving direction of the movable member by the driving means can be made to intersect with the advancing and retreating direction of each guide path forming member. Can be

According to the fourth aspect of the present invention, since the groove cam mechanism is used, the operation of the guide path forming member is assured.

According to the fifth aspect of the present invention, since the inner surface, the outer surface, and the edge of the running tape can be guided by using the groove-shaped member, the guiding can be stably performed. Further, by using the outer guide member that is fixedly arranged, the size of the groove-shaped member can be reduced, so that the guide mechanism can be further reduced in size.

[Brief description of the drawings]

FIG. 1 is a partially broken perspective view of a main part of a binding machine including a tape guide mechanism according to an embodiment of the present invention.

FIGS. 2A and 2B are schematic cross-sectional views illustrating the operation of a guideway forming member. FIG. 2A illustrates a state in which the guideway forming member is in a guiding posture, and FIG. Is shown.

FIG. 3 is an exploded perspective view mainly showing a tape guide mechanism.

FIGS. 4A to 4F are schematic front views of a binding machine sequentially showing a binding step.

FIG. 5 is a partial cross-sectional schematic front view of a tape guide mechanism as another embodiment of the present invention.

FIG. 6 is an exploded perspective view of a second drive mechanism.

FIG. 7 is a partial cross-sectional schematic side view of the tape guide mechanism showing a state where the guide path forming member is in a guide posture.

FIG. 8 is a partial cross-sectional schematic side view of the tape guide mechanism showing a state where the guide path forming member is in a retracted posture.

[Explanation of symbols]

 T Tape L Loop A Object to be tied 1 Machine frame 4, 4A Tape guide mechanism 5 Front fixed plate 6 Rear fixed plate 7, 9 Guide path forming member 8 Fixed guide member 10 Guide path 11, 12 Flange 13 Web 14 Hydraulic cylinder ( Drive mechanism) 51 first drive mechanism 52 second drive mechanism 53 movable member 54 hydraulic cylinder (drive means) 55 conversion mechanism 62, 63 guide groove 64, 65 cam follower

Claims (5)

[Claims] A tape guide mechanism having a guide path for guiding a tape running for forming a loop in a binding machine for forming a loop by a tape and binding the object to be bound by tightening the loop. It is supported on both sides in the width direction by a support member so as to be able to advance and retreat in the width direction of the tape, and is retracted from the tape to allow the tape to be guided when the loop is formed and to allow the tape to tighten when the loop diameter is reduced. A tape guide mechanism for a binding machine, comprising: a pair of guide path forming members capable of being displaced to a retracting position; and a drive mechanism for driving the guide path forming member to the guiding position and the retracting position. 2. The driving mechanism according to claim 1, wherein the first driving mechanism for driving the first ends of the pair of guide path forming members corresponding to each other collectively and the second driving mechanism for the corresponding second ends collectively. 2. A tape guide mechanism for a binding machine according to claim 1, further comprising a second drive mechanism for driving. 3. The first and second drive mechanisms respectively include a movable member driven by a drive means in a direction intersecting a displacement direction of the guide path forming member, and a displacement of the movable member between the guide path forming member and the movable member. 3. A tape guide mechanism for a binding machine according to claim 2, further comprising a conversion mechanism for converting the displacement into a displacement. 4. The conversion mechanism is formed in a pair of guide grooves formed in a movable member and in each guide path forming member.
4. A tape guide mechanism for a binding machine according to claim 3, further comprising a groove cam mechanism including a cam follower guided by a cam surface in a corresponding guide groove. 5. Each of the guide path forming members has a pair of flanges for guiding an outer surface and an inner surface of the tape forming a loop, respectively, and comprises a groove-shaped member that opens toward the tape. 5. The binding machine according to claim 1, further comprising an outer fixed guide member fixedly arranged between the path forming members and guiding a widthwise central portion of an outer surface of the tape forming a loop. Tape guide mechanism.