JPS5811608A - Bundling machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention involves winding a continuous tape around a group of articles while creating an open loop, reducing the diameter of the open loop of the continuous tape, and then turning it into a closed loop. The present invention relates to a binding machine that binds a group of articles by gluing the tips and middle parts of continuous chips that are overlapped at the location where the articles are overlapped.

BACKGROUND ART Binding machines that bind leafy vegetable groups using a continuous tape such as a single-sided adhesive tape or a non-adhesive tape are conventionally known. This type of binding machine has a friction clutch that slips when the tension generated in the continuous tape reaches a certain value during the retracting operation. Regardless of size, it can be bound with continuous tape of constant tension.

The above binding machine cannot significantly increase the torque load on the friction clutch when it slips due to the limitations of the friction clutch itself. Therefore, it is not suitable for bundling root vegetables, etc., where a large amount of tension is generated in the continuous tape during bundling.

An object of the present invention is to provide a tying machine suitable for tying root vegetables, etc., where a large amount of tension is generated in the continuous tape during tying. To achieve this object, the present invention includes a base, a tape supply mechanism including a tape wheel for unwinding a tape rotatably supported by the base at one end of the base, and a tape supply mechanism. a base-side tape adhesion mechanism part that is provided on the base and is spaced apart from the base and grips the leading end of the tape;
A binding arm is pivotably supported on a base in a position close to the tape supply mechanism so as to be able to rise and fall freely, and a binding arm is provided on the non-pivotally supported end side of the binding arm and works in cooperation with the tape adhesion mechanism on the base side to bind the bundled objects. A tape adhesion mechanism on the binding arm side that adheres the tape formed in a loop around the object, and a tape adhesion mechanism section provided on the pivot end side of the binding arm, and which allows the tape wheel to perform three actions: freely rotatable, rotatable, or non-rotatable. A drive mechanism section for tightening the tape, a clutch disposed in the middle of the torque transmission system between the tape supply mechanism section and the drive mechanism section, and the length of the tape running path from the tape wheel to the tape adhering mechanism section on the base side. The tape support member is located at a position where the width becomes thicker as the amount of collapse of the binding arm increases, and the tape guide arm is attached to the base, and the tape supply mechanism includes A locking wheel gear and a rotating wheel gear are provided integrally with the tape wheel, and the clutch includes a hook member that meshes with the locking wheel gear, a cunnion to which torque is constantly transmitted from the drive mechanism, and a rotating wheel gear that is constantly connected to the tape wheel. A transmission gear that meshes is provided, and torque is transmitted by frictional force between the pinion and the transmission gear and between the pinion and the hook member, and as the binding arm is lowered from the upright position, first, the pinion and the transmission gear are During this time, torque is transmitted and the slack part of the unwound tape is rewound.
After that, torque is transmitted between the pinion and the hook member, the tape wheel is locked, and the tape is tightened.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to FIGS. 1 to 8. FIG. 1 shows a binding machine 2 that uses a single-sided adhesive tape 1 made of a resin tape such as polyvinyl chloride 2 coated with an adhesive on one side as a binding tape, and this binding machine 2 has a rectangular base. One end side of the stand 3 (in Fig. 1,
A drive mechanism that has a tape supply mechanism section 4 on the left side of the base 6, has a clutch 5 adjacent to this tape supply mechanism section 4, and drives the tape supply mechanism section 4 via this clutch 5. 6 adjacent to the clutch 5, and a base-side tape adhesion mechanism 7A on the other end side of the unit 3 (the right end side of the base 3 in FIG. 1). Between the drive mechanism section 6 and the base tape adhesion mechanism section 7A, a binding arm 8 that can be manually lowered and raised by an operator is attached to a support 9 by a pivot shaft 13.
is supported by.

As shown in FIGS. 1 and 3, the binding arm 8 is composed of two arm side plates 8a and 8b whose lower sides are curved concavely and arranged in parallel. and the tip part of 8b (in Fig. 1, the arm side plate 8a
A tape guide pin 10 is disposed laterally at the left end portion of 8b and 8b. Two tension springs 12 for standing operation are arranged between the tape guide pin 10 and a spring hook 11 provided at the lower end of the support column 9.

At the rear end of the binding arm 8, there is a grip 14 for manual operation.
further protrudes and is fixed to the rear of the binding arm 8, forming a part of the binding arm 8.

Furthermore, a binding arm side tape adhesion mechanism section 7B is provided on the rear end side of the binding arm 8. When the binding arm 8 is completely erected, the single-sided adhesive tape 1 is stretched linearly between the binding arm side tape adhesion mechanism section 7B and the base side tape adhesion mechanism section 7A.

Two tape guide fixing arms 15 are attached to the upper end surface of the support column 9.
are erected, and a tape guide roller 16 is disposed laterally at the upper end of these tape guide fixed arms 15 as a tape support member.

The single-sided adhesive tape 1 unwound from the tape supply mechanism section 4 contacts the tape guide roller 16 of the tape guide fixed arm 15, and then passes through the binding arm side tape adhesion mechanism section 7B to the base side tape adhesion mechanism section. By having the tip portion 1a held by the binding arm 7A, a tape running path whose total length is variable according to the lowering and raising of the binding arm 80 is formed. The length of this tape running path increases as the binding arm 8 is lowered from its upright position. For this reason, if the binding arm 9 is lowered while the single-sided adhesive tape 1 unwound from the tape supply mechanism 4 is maintained at a constant length, the tension of the single-sided adhesive tape 1 increases rapidly.

At the lower position of the binding arm 8 is a base side tape adhesion mechanism part 7.
A support stand 18 is provided so as to protrude from a tape crimping stand 17', which constitutes a part of A, to the front of the base 3 (to the left in FIG. 1). On this receiver, articles to be bundled are placed on the stand 18.

As shown in detail in FIG. 2 and FIG.
An upright wheel support plate 19, a tape wheel 20 rotatably supported by a bearing 24 on the wheel support plate 19, a wheel shaft 21 integrally connected to the tape wheel 20, and a rotating shaft integrally connected to the wheel shaft 21. It consists of a compression coil spring 25 disposed between a locking wheel gear 22, a locking wheel gear 23, and a bearing 24 and tape wheel 20. A winding tape 27 wound in an annular shape is attached to the tape wheel 2° via a wheel adapter 26.

The compression coil spring 25 provides rotational resistance to the tape wheel 2°, thereby preventing the tape wheel 2o from rotating due to the residual tension of the single-sided adhesive tape 1, especially when the clutch 5 is in the released state.

The drive mechanism section 6 includes a fan-shaped drive gear 29 fixed to the binding arm 8 by a rectangular bracket 28, and an L-shaped clutch engagement operation pawl 3o pivotally supported on the side surface of the drive gear 29 by a pivot 32. and a clutch release operation plate 31 fixed to the side surface of the drive gear 29 so as to protrude below the drive gear 29. The pivot 32 is located on a radius that bisects the length of the drive gaff 290 arc.

In the driving gear 29, a stop screw 33 is screwed to the rear part of the pivot shaft 32.
The upper surface side of the threaded part 33a of No. 3 and the clutch engagement operation claw! 10
A torsion coil spring 34 is disposed between the one end 30a and the other end 30a. The latch engaging operation pawl 3o is normally elastically biased counterclockwise in FIG. 2 by this torsion coil spring 34. The other end 3ob of the clutch engagement operation pawl 3o contacts the bottom surface side of the threaded portion 33a of the stop screw 33, thereby preventing the clutch engagement operation pawl 3o from rotating counterclockwise beyond a certain angle. .

The switch 5 includes a fixed shaft 65 fixed to the wheel support plate 19, a pinion 36 which is rotatably supported by the fixed shaft 35, and which is constantly engaged with the drive gear 29, and a pinion 36 which is rotatably supported by the fixed shaft 35. , Gah, constantly rotating wheel gear 2
2, the transmission gear 37 is integrated with the transmission gear 67, and is interposed between the pinion 36 and the transmission gear 37.
The first clutch spring 40° is used to push the first friction plate 39 made of rubber in a direction that brings the first friction plate 39 into close contact with the vinyl disc.
A hook plate 41 as a hook member that meshes with the ivy wheel gear 23 or separates from the locking wheel gear 23, and a pinion 36. ! :' A second rubber friction plate 42 which is integrated and interposed between the pinion 36 and the hook plate 41, a movable clutch push plate 43 rotatably supported by the fixed shaft 35, A collar 44 and a second clutch spring 45 are interposed between the hook plate 41 and the movable clutch push plate 46, and a collar 44 and a second clutch spring 45 are interposed between the movable clutch push plate 46 and the wheel support plate 19, and fixed clutch pusher plate 46,
It also includes a tension release plate 47 for releasing the spring force of the first clutch spring 40.

The fixed shaft 35 is a stepped shaft, and its large diameter shaft portion 48 has a first friction plate 39, a pinion 36, a second friction plate 42, a hook plate 41, a collar 44, a second clutch spring 45, and a movable clutch push plate 43. A fixed clutch pushing plate 46 is fitted onto the outside, and a transmission gear S7 and a tension release plate 4 are attached to the small diameter shaft portion 49.
7 and the first clutch spring 40 are fitted onto the outside.

A threaded portion 50 is formed at the tip of the small diameter shaft portion 49, and a spring force adjustment nut 51 is screwed into this threaded portion 50. This spring force adjusting nut 51 adjusts the spring force of the first clutch spring 4'o.

Pinion 36, transmission gear 37, rotating wheel gear 22
Both of the locking wheel gears 23 and 23 have a truncated cone shape on the front side, while a hexagonal recess is formed in the center of the gear on the back side.

A hexagonal convex portion 53 that fits into the hexagonal concave portion 52 of the transmission gear 37 is formed at the center of the front surface of the first friction plate 39 that is integral with the transmission gear 37 . By fitting these hexagonal recesses 52 and hexagonal protrusions 53, torque is transmitted from the second friction plate 39 to the transmission gear 67 (see FIG. 4).

The friction plate 69 or 42 is made of a material (for example, It is made of polyurethane rubber).

The hook plate 41 has a substantially doglegged overall shape, and has an acute triangular hook beak 54 at its upper end. This hook beak 54 is the locking wheel gear 2
3 and locks this locking wheel gear 23. A circular boss portion 55 having a truncated conical surface is provided at the center of the hook plate 41. This boss portion 55 is rotatably fitted onto the fixed shaft 65.

The surface side of the boss portion 550 frictionally engages with the second friction plate 42 .

The lower end 41a of the hook plate 41 is connected to the wheel support plate 1.
9 may be held by a holding lever 56 disposed laterally, thereby preventing rotation in the counterclockwise direction in FIG.

The holding lever 56 is pivoted to the wheel support plate 19 by a screw 57, and is manually operated so as to be stationary upward or downward by engaging with two positioning pins 58 and 59 implanted in the wheel support plate 19. Be manipulated. When the holding lever 6 is stationary in the upper position, it prevents the rotation of the hook plate 41, and on the other hand, when it is in the lower position, it prevents the hook plate 4 from rotating.
1 rotation is allowed.

The movable clutch push plate 4 that pushes the hook plate 41 in a direction to bring it into close contact with the second friction plate 42 has an engaging pawl 60 formed to protrude toward the drive gear 29 in a trapezoidal shape. At the lower end side 60a of this engaging claw 60, the clutch engaging operation claw 3
0 engages with the engaging pawl 60 while moving clockwise in FIG. 27 from further below the position shown in FIG. Rotate the latch push plate 43 counterclockwise until it can move by a certain amount.

On the other hand, while the clutch engaging operation pawl 0 is moving counterclockwise and descending from the position shown in FIG.
0, thereby rotating the latch push plate 43 by a certain amount in the clockwise direction until the engagement with the engagement pawl 60 is released.

The movable clutch push plate 46' has an arm 61 as a hook release receiver projecting downward, and the hook release receiver is located at the tip of the arm 61 (in FIG. 2, the hook release receiver is attached to the arm 61).
A roller 62 is pivotally supported at the lower end portion of the roller 62 . roller 6
2 may be replaced by a simple pin. This roller 62
is a driven cam of the clutch release operation plate 31.

As shown in FIG. 5, on the back side of the movable clutch pusher plate 43, three fan-shaped abutment protrusions 63 projecting in an inclined plane by press molding are arranged in the same circle with the fixed shaft 35 as the center. They are formed at regular intervals on the circumference.

On the other hand, these engaging protrusions 6 are provided on the fixed clutch push plate 46.
Three sector-shaped engaging holes 64 are formed at regular intervals on the same circumference of a circle centered on the fixed shaft 35, corresponding to '6. As shown in FIG. 22, after the engagement between the movable clutch push plates 4 and 6 and the clutch engagement operation pawl 60 is released at the final stage of the bundling arm 80 collapse process, the engagement hole 64 of the fixed clutch push plate 46 is opened. The engaging protrusion 63 of the clutch push plate 43 is inserted. At this time, the clutch push plate 43 is shifted toward the fixed latch push plate 46 by the spring force of the second clutch spring 45. In this state,
The boss portion 55 of the hook plate 41 is separated from the second friction plate 42, and the hook plate 4 is separated from the second friction plate 42.
No torque transmission to 1 takes place.

One end 47a of the tension release plate 47 is bent at a right angle, and the one end 47a is inserted into a rectangular hole 6β bored in the wheel support plate 19.

One end 47a of the tension release plate 47 can freely pivot within this rectangular hole 68, thereby allowing the tension release plate 47 to pivot.

The non-pivot end side of the tension release plate 47 (the right end side of the tension release plate 47 in FIG. 3) is bent toward the bracket 28 to form an operating end portion 65. This operating end portion 65 is configured when the operating end portion 65 comes into contact with the head 67m of the lower bolt 67 of the two upper and lower bolts 66 and 67 screwed onto the drive gear 29 on the front end side of the bracket 28. The head 67a of the bolt 67 is moved in a direction away from the bracket 28, and when the head 67a of the bolt 67 is separated from the operating end 65, it is moved in a direction closer to the bracket 28 by the first clutch spring 40.

Hereinafter, the operation of the binding machine 20 will be explained in detail. First, when the binding arm 8 is erected to the maximum extent by the spring force of the tension spring 12 for erecting operation, the single-sided adhesive tape 1
is unwound from the winding tape 27 by the tape wheel 20 of the tape supply mechanism section 4, and then the tip portion 1a passes through the tape guide pin loop adhesive mechanism section 7B of the binding arm 8 and is attached to the base side tape adhesive mechanism section 7A. being held. The binding arm side tape adhesion mechanism part 7B and the base side tape adhesion mechanism part 7A are spaced as far as possible, and the single-sided adhesive tape 1 is stretched in a straight line without slack with its adhesive side 1b facing upward. ing.

In this state, the clutch engagement operation pawl 30 remains at a lower position than the engagement pawl 60 of the movable clutch push plate 43, and the engagement protrusion 66 of the movable clutch push plate 43 retreats into the engagement hole 64 of the fixed clutch push plate 46. However, the hook beak 54 of the hook plate 41 is separated from the locking wheel gear 23 due to the gravity acting on the hook plate 41.

On the other hand, as shown in FIG. 6, the head 67 of Bokuto 67
a connects the operating end 65 of the tension release plate 47 to the drive gear 2
9, and the spring force of the first clutch spring 40 is not applied to the transmission gear 37.

Therefore, the first friction plate 69 and the pinion 36 are not frictionally engaged, and no torque is transmitted between the pinion 36 and the transmission gear 67.

While pressing objects to be bound, such as a group of root vegetables, onto the single-sided adhesive tape 10 stretched linearly between the binding arm-side tape adhesion mechanism section 7B and the base-side tape adhesion mechanism section 7A, the receiver is placed on the stand 1.
8, the single-sided adhesive tape 1 is further unwound from the winding tube 27. At this time, the locking wheel gear 26 is locked, and the rotating wheel gear n remains in mesh with the transmission gear 37 because the first friction plate 39 and pinion 36 are not frictionally engaged. Rotate with.

Since the tape wheel 20 receives the spring load of the compression coil spring 25, even if the objects to be bound are pressed against the single-sided adhesive tape 1 a little roughly, the tape wheel 2o will rotate to the extent that excessive slack will occur. There isn't.

Next, when the operator lowers the binding arm 8, the seventh
As shown in the figure, the head portion 67a of the bolt 67 is separated from the operating end portion 65 of the tension release plate 47, and the spring force of the first clutch spring 4o is applied to the transmission gear 37. Therefore, the first friction plate 69 is pressed against the pinion 36, and torque can be transmitted from the pinion 36 to the transmission gear 37. As a result, as the drive gear 29 rotates clockwise in FIG. 2, the pinion 36 and the transmission gear 3
7 rotates counterclockwise, and the rotating wheel gear 22 and tape wheel 20 rotate clockwise, thereby
The slack portion of the unwound single-sided adhesive tape 1 is rewound.

On the other hand, the clutch engagement operation pawl 30 engages with the engagement pawl 6o,
The movable clutch push plate 43 is rotated counterclockwise in FIG. As a result, the engaging protrusion 63 of the movable clutch pushing plate 46 is pushed out from the engaging hole 64 of the fixed clutch pushing plate 46, and the movable clutch plate 43 is slid toward the distal end side of the fixed shaft 65. Therefore, since the hook plate 41 is pressed by the second clutch spring 45 and comes into close contact with the second friction plate 42, it rotates counterclockwise together with the pinion 36, and the hook beak 54
meshes with the locking wheel gear 23, and the tape wheel 20 is locked.

Further, when the operator lowers the binding arm 8, the tape wheel 20 is locked and cannot rotate, and the drive gear 29 further rotates clockwise, so the pinion 3
6 and the first friction plate 39, and at the same time the length of the tape running path gradually increases. Moreover, since the length of the single-sided adhesive tape 1 unwound from the tape wheel 20 remains unchanged, the tension of the single-sided adhesive tape 1 stretched between the tape wheel 20 and the base-side tape adhesion mechanism 7A increases rapidly. Due to the large size, the objects to be bound are strongly tightened.

The object to be bound is bound, the open loop of the single-sided adhesive tape 1 wound around the circumference of the object is closed, and the middle part and tip 1a of the overlapped single-sided adhesive tape 1 of this open loop are continuous. After being separated from the single-sided adhesive tape 1, the binding arm 8 is further pushed down, causing the shift latch release operation plate 31 to press the roller 62 of the hook release receiver arm 61 in a clockwise direction. The engaging protrusion 63 of the movable clutch pushing plate 43 is inserted into the engaging hole 64 of the fixed clutch pushing plate 46. As a result, the spring load of the second clutch spring 45 on the hook plate 41 is released, the frictional engagement between the hook plate 41 and the second friction plate 42 is released, and the torque transmission from the pinion 36 to the hook plate 41 is interrupted. Since the locking wheel of the seven-sided adhesive tape 1 can now rotate, the tape wheel shaft receives a spring load from the compression coil spring 25, so that free rotation of the tape wheel 20 due to the residual tension of the single-sided adhesive tape 1 is prevented. .

Another embodiment of the present invention will be described in detail based on FIG. In this embodiment, the base-side tape adhesion mechanism 7A and the binding arm-side tape adhesion mechanism 7B have the same structure as in the above-mentioned embodiment, so a description thereof will be omitted. Furthermore, in the following description, parts having the same structure and function as those of the above embodiment are given the same reference numerals. In this embodiment, the surface side 70 of the pinion 700 that meshes with the drive gear 29 is
A second friction plate 72 is fitted to the rotating wheel gear 2.
A first friction plate 71 is fitted on the back side 37b of the transmission gear 37 that meshes with the transmission gear 2. First friction plate 71 and second friction plate 7
2 and are frictionally engaged by their respective circular planes.

A circular boss portion 73 is provided on the back side 70b of the pinion 70.
is formed, and an O-ring 74 is fitted around this boss portion 73. This O-ring 74 and hook plate 75
Torque is transmitted from the pinion 70 to the hook plate 75 through frictional engagement with the surface side of the pinion 70 .

No compression coil spring is disposed between the movable clutch push plate 43 and the hook grate 75.

In the case of this embodiment, the hook plate 75 has a simple shape, and the torque is stably transmitted from the vinyl ton 70 to the hook plate 75 by the O-ring 74 instead of the compression coil spring. This is different from the previous embodiment.

As described above, according to the present invention, if slack occurs during unwinding of the continuous tape, this slack can be reliably removed by unwinding the continuous tape, and then binding with high tape unwinding reliability can be performed. .

[Brief explanation of drawings]

FIG. 1 is a partial cross-sectional side view of a binding machine according to an embodiment of the present invention, FIG. 2 is a detailed side view of the vicinity of the tape supply mechanism in the binding machine, and FIG. 3 is a detailed side view of the vicinity of the tape supply mechanism of the binding machine. 4 is a cross-sectional view of the fixed and movable clutch pushing plates engaged, FIG. 5 is an assembled exploded perspective view of the pinion and the second friction plate, and FIG. 6 is a cross-sectional view of the clutch when unwinding the tape. Vertical cross-sectional view, FIG. 7 is a vertical cross-section of the clutch during tape rewinding 1... single-sided adhesive tape, 1a... tip, 2...
... Binding machine, 3... Base, 4... Tape supply mechanism section, 5... Clutch, 6... Drive mechanism section, 7A...
- Base side tape adhesion mechanism part, 7B... Binding arm side tape adhesion mechanism part, 8... Binding arm, 15... Fixed arm for tape guide, 16... Tape guide roller, 20... Tape wheel, 22... - diversion wheel gear, 23... locking wheel gear, 36...
- Pin, onion, 37... Transmission gear, 39... First friction plate, 40... First clutch spring, 41... Hook plate, 42... Second friction plate, 43... Movable clutch push plate, 45...Second clutch spring, 46...
Fixed clutch push plate, 47... Tensilon release plate,
63... Engagement protrusion, 64... Engagement hole. Patent applicant Akira Koike, patent attorney representing Max Co., Ltd.

Claims (1)

[Claims] a base; a tape supply mechanism including a tape wheel for unwinding a tape rotatably supported by the base at one end of the base; and a tape supply mechanism provided on the base and spaced apart from the tape supply mechanism; a base-side tape adhesion mechanism that grips the tip of the tape, a binding arm that is pivotally supported on the base in a position close to the tape supply mechanism so that it can rise and fall freely; a binding arm side tape adhesion mechanism unit that cooperates with the base side tape adhesion mechanism unit to adhere the tape forming a loop around the object to be bound; and a binding arm side tape adhesion mechanism unit provided on the pivot end side of the binding arm; Rotatable on tape wheel,
A drive mechanism section for performing three operations of rotation or non-rotation, a clutch disposed in the middle of the torque transmission system between the tape supply mechanism section and the drive mechanism section, and a tape adhesion mechanism section from the tape wheel to the base side. The above-mentioned tape has a tape supporting member at a position where the length of the tape running path leading to the tying arm increases as the amount of collapse of the binding arm increases, and a tape guide arm attached to a base. The supply mechanism section is provided with a locking wheel gear and a rotating wheel gear integrally with the tape wheel, and the clutch includes a hook member that meshes with the locking wheel gear, a pinion to which torque is constantly transmitted from the drive mechanism section, and a rotating wheel gear. A transmission gear that constantly meshes with the wheel gear is provided, and torque is transmitted by frictional force between the pinion and the transmission gear and between the pinion and the hook member, and as the binding arm is lowered from the upright position, first, Torque is transmitted between the pinion and the transmission gear, the slack part of the unwound tape is rewound, and then the torque is transmitted between the pinion and the hook member, the tape wheel is locked, and the tape is tightened. A binding machine characterized by the following: