JP2721090B2 - General purpose 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 general-purpose binding machine for binding cut flowers, soft vegetables, boxes and the like.

[0002]

2. Description of the Related Art Recently, a well-known mechanism for ejecting a stirrup used for a combine or a binder has been rationally improved, and an electric control type one-rotation clutch mechanism has been used. A general-purpose bundling machine has been put into practical use that can start a bundling operation and use a rubber string to bind a cut flower or a soft vegetable without damaging it. The worktable that performs the bundling operation while being placed and transported is configured with a flat surface, and the switch for starting the bundling operation is provided with its detection piece protruding above the worktable (see, for example, the present application). See Japanese Patent Application No. 3-120733).

[0003]

In the above-mentioned conventional structure, while the objects to be bound, such as cut flowers, are bundled by a predetermined number of workers and supplied in a gripped state, the objects to be bound are moved upward from the workbench of the operation switch by the objects to be bound. Contact the detecting piece that protrudes
Although the binding operation can be started as it is, the work can be performed efficiently, but it is convenient when the binding object such as a cut flower can be bound by one binding operation, for example, In the case of using such a general-purpose binding machine to bind something like a lunch box consisting of a foamed Styrofoam box with a rubber string, the detection piece projecting from the worktable comes into contact with the box as described above. When the box is damaged or the rubber strap is crossed, there is a possibility that the detection piece may be caught on the rubber strap that is already in a bound state and a smooth binding operation may not be performed, and there is room for improvement. An object of the present invention is to eliminate the above disadvantages.

[0004]

A feature of the present invention is to provide a bundling mechanism for bundling a tied object placed and transported on a work table,
A pass detection switch having a detection piece protruding upward from the workbench, and an operation switch for stepping operation are provided, and the pass detection switch detects that the object to be bound has passed, or the operation switch When operated, a one-rotation clutch mechanism interposed between a drive source and the binding mechanism is operated to perform the binding operation, and the detection piece is in an operation state in which the detection piece projects upward from a work surface of the worktable. And a non-operating state that does not protrude from the work surface of the worktable.

[0005]

[Function] When an operator puts a bundle of objects to be tied such as cut flowers in a predetermined amount and places it on the work table while gripping it, the detection piece is set to the operating state, and the object to be tied is grasped while holding the object to be tied. By activating the one-turn clutch mechanism by causing the binding object to contact the detection piece of the passage detection switch by the binding object itself and activating the one-rotation clutch mechanism, it is possible to efficiently perform the binding operation without the need for a dedicated manual switch operation. Then, when binding boxes made of a soft material, the detection piece of the passage detection switch is switched to a non-operating state, so that the object to be bound is moved to the binding position and the foot operation switch is operated. To start and perform the binding operation. At this time, since there is no protrusion on the worktable, there is no possibility that the box body will be damaged, and there is no possibility that the already tied cord is caught and hinders the tying operation. Is unnecessary and the binding work can be performed efficiently.

[0006]

As described above, it is not necessary to start the binding by a dedicated manual operation, and the operator can supply the bundled object to the binding position while grasping the bundled object in a bundled state, which is excellent in workability. However, according to the difference in the properties of the objects to be tied, it is possible to provide a device that can always be set to an appropriate working state and can perform a smooth tying operation without causing any adverse effect such as damaging the objects to be tied. .

[0007]

Embodiments will be described below with reference to the drawings. FIG.
FIG. 4 to FIG. 4 show a general-purpose binding machine that binds to-be-tied objects a such as cut flowers, soft vegetables, lunch boxes, magazines, and the like with a rubber string using a rubber string. The binding machine includes an electric motor 2 as a driving source and a knot mechanism 3 inside the box 1, and a cord storage unit 5 in which a binding rubber cord 4 is wound and stored above the outside of the box 1.
And a needle 6 for supplying a rubber string 4 from the winding string storage section 5 toward the knot mechanism 3.
The object to be tied a is artificially placed and supplied along the upper work table 7 to perform the tying operation. As shown in FIG. 4, a transmission belt extends over a pulley 9 provided on an output shaft 8 of the electric motor 2 and a pulley 13 provided on a relay shaft 12 supported by a bearing member 10 erected from the bottom of the box 1. 1
4 and a gear 15 provided on the relay shaft 12 and a driven shaft 16
A large-diameter gear 17 that is freely fitted to the outside is meshed and engaged, and a one-rotation clutch mechanism 18 is interposed between the large-diameter gear 17 and the driven shaft 16. And this driven shaft 1
A drive crank mechanism 19 for the needle 6 is provided at one end of the needle 6, and is linked to a drive shaft 21 of the knot mechanism 3 via a bevel gear mechanism 20 provided at the other end, so as to be branched and transmitted respectively. As shown in FIG. 5, the one-rotation clutch mechanism 18 includes a pawl clutch 22 between the boss of the large-diameter gear 17 and the driven shaft 16,
The locking plate 23 is inserted between the driven meshing portion 22a and the driving meshing portion 22b of the claw clutch 22 in the axially radially inwardly pressing state from the upper side, and the clutch is disengaged. The locking plate 23 is set to the operation plate 2.
By driving the electromagnetic solenoid 25 through 4 and swinging in a direction away from the pawl clutch 22, the clutch can be set to the engaged state. Immediately after the clutch is engaged, the electromagnetic solenoid 25 is turned off and the driven shaft 16 makes one rotation, so that the locking plate 23 is engaged along the inclined cam surface 26 formed on the outer peripheral surface of the driven side engaging portion 22a. Then, the driven side engagement portion 22a is configured to be gradually slid toward the clutch disengagement side and to rotate only one rotation. As shown in FIG. 22, the electromagnetic solenoid 25 is actuated for a short time by the operation of either the foot switch SW1 as a foot operation switch or the hand switch SW2 as a passage detection switch disposed at the foot of the worker. It is configured to work only. These switching operations are performed by a changeover switch SW3. The hand switch SW2 causes the operating piece 27 to protrude upward from the workbench 7 at a position on the upper side of the knot mechanism 3 at the passing position at the time of placing and supplying the material to be tied, and It is configured to automatically enter and operate upon contact.
The needle 6 is provided so as to be exposed upward from the worktable 7, and is pivotally supported on a needle support case 28 projecting upward from the worktable 7 so as to be swingable about the horizontal axis X1. That is, as shown in FIG.
8, a boss 30 is externally fitted to a rotating shaft 29 rotatably supported by the boss 8, and a support arm 31 bent in a V shape from the boss 30 is extended. The needle 6 is connected to the tip of the. As shown in FIG. 6, a drive arm 32 attached to the rotation shaft 29 and the crank mechanism 19 are interlocked and connected via a push-pull rod 33 inside the needle support case 28, and a crank mechanism is provided. The drive arm 32, ie, the needle 6
Is rockingly driven over a predetermined range to supply the rubber string 4 to the knot mechanism 3. The needle 6 is urged to return to the upper standby position by a spring 34 disposed in the needle support case 28. When the one-rotation clutch mechanism 18 is in the disengaged state, the elastic force of the rubber cord 4 that extends extends. It is configured not to stop at an unstable position displaced downward from a predetermined standby position. As shown in FIGS. 1 to 3 and 9, the cord storage unit 5 rotatably supports the cord storage roll 36 with a support member 35 extending from the needle support case 28 and An operating slack removing rod 37 is provided, and a pair of string guide rollers 39 and 40 are attached to the tip of a support rod 38 extending from the needle support case 28. The feeding cord is wound once around a guide roller 40 located on the lower side of the cord supply, and then supplied to the needle 6. The guide roller 40 is pushed by a spring 41 whose urging force can be adjusted so as to be fed. The condition can be adjusted. As shown in FIG. 11, the rubber band 4 for binding is formed on the surface of the rubber plate main body 4a in the form of a strip with streaky irregularities 4b continuous in the longitudinal direction of the band to improve the slip in the longitudinal direction and to be bound. It is configured so that an appropriate tension can be obtained in a state where the objects a are bundled.

The knot mechanism 3 is provided in the form of a knotter bill, holds and holds one end of a rubber string 4 and overlaps a new string supplied by the needle 6 with the held string. A string holder 42 to be set,
A knot building 43 for winding and knotting the two overlapping string portions as described above is provided, and the string holder 42 and the knot building 43 are arranged such that their respective rotational drive axes are parallel to each other. A pair of timing gears 45 and 46 for driving these are mounted on the node drive shaft 21. And knot building 43
When the knot building 43 is being wound around, the rubber string portion 4 held and held by the string holder
c and a rubber guide portion 47 for winding the rubber string portion 4d after winding the material to be tied to form a knot, and a string guide member 47 for locking and holding each of the string portions 4c and 4d at a predetermined affected position. And a moving means A for moving the string guide member 47 in a direction substantially perpendicular to the string supply direction by the needle 6 after the string winding operation by the knot building 43 is completed. More specifically, as shown in FIGS. 2, 7 and 10, the string guide member 47 is provided in a plate shape that covers the upper part of the knot building 43, and the two string portions are arranged along the moving direction of the object to be bound a. Are formed and engaged with the support bracket 44 by a swing support arm 49 so as to be swingable about an axis along the axis of the knot driving shaft 21. The swing support arm 49 is urged by a spring 50 to swing toward the above-mentioned working posture, and a cam follower 52 is brought into contact with and engaged with a cam 51 provided on the knot driving shaft 21, so that the above-mentioned working posture and the knot building The moving means A is configured so as to swing and move from the position of retreating from the upper position.
In this way, when the string guide member 47 is switched to the retracted posture while being wound by the knot building 43, the string comes off from the knot building 43, and the knot operation ends. Note that the rotating shaft 29 of the needle 6 is
And the rubber shaft 4 is supplied to the knot building 43 and the string holder 42 at a substantially uniform level. In addition, the needle support case 28 is provided in an inclined posture so that a knot space can be increased. In the vicinity of the string guide member 47, the locking recess 4
8 is provided with a string pulling member 53 that can be switched between a retaining position for closing the entrance portion and a position for opening the entrance portion. Switching means B is provided. That is, as shown in FIGS. 7 and 8, the string pulling member 53 is pivotally supported by the support bracket 44 so as to be swingable around an axis X2 orthogonal to the axis of the knot driving shaft 21, and is turned to the open position by the spring 54. The cam follower 55 is connected to the cam 56 provided on the joint drive shaft 21 to perform a switching swing operation. or,
As shown in FIGS. 19 and 20, between the knot building 43 and the string holder 42, the rubber string 4 whose one end is held by the string holder 42 when the needle 6 is withdrawn is regulated to a predetermined standby position. A string guide plate 57 is provided, and the string guide plate 57 is arranged in a state of approaching the outer end rotation trajectory of the string cutting cutter 58 provided in the string holder 42 at a minute interval smaller than the thickness of the rubber string. is there.

Next, the binding operation procedure will be described. From the standby state in which the end of the rubber string 4 is sandwiched and held by the string holder 42 and the needle 6 is in the upper standby position, the tied object a is placed on the worktable 7 and supplied along the lower side of the string. When the object to be bound a approaches the place where the binding is performed, the object to be bound a comes into contact with the operating piece 27 of the hand switch SW2, the one-rotation clutch mechanism 18 is operated, and the driven shaft 16 is driven one rotation. . Then, as shown in FIG. 12, the needle 6 operates to supply the rubber string 4 to the knot mechanism 3. At this time, the string wound around the string guide roller 40 is further wound in the direction in which the string is wound with the operation of the needle 6, and the feeding of the string is almost stopped. Then, before the needle 6 reaches the maximum entry position, first, the string pulling member 53 switches from the open position to the retaining position. Immediately thereafter, the knot building 43 is driven to rotate, and the string portion 4c held by the string holder 42 and the string portion 4d supplied by the needle 6 are wound together to start the knot operation (FIG. 13). At this time, the string guide member 47 is set at the operating position.
Thereafter, when the needle 6 reaches the maximum entry position, the string holder 42 rotates from that point and the two string portions 4c and 4d are rotated.
And acts to be wound up by the knot building 43 (FIGS. 14 and 15). When the winding operation of the knot building 43 is completed, the string pulling member 53 switches to the open position, and the cutting cutter 58 provided on the string holder 42 approaches the string guide plate 57 to cut the string portion, After that, the string guide member 47 swings laterally from the action posture, pulls out the string wound around the knot building 43, and the knot operation ends (FIGS. 16 to 18). At this time, near the end of the winding operation of the knot building 43, the string holder 42 releases the holding of the held string portion 4c, and the needle 6 newly holds and holds the supply string portion 4d. Then, the supply cord portion 4d is cut by the cutting cutter 58. As described above, since the rubber string 4 is hardly extended from the needle 6 side, the rubber string 4 during the knot operation is in an extended state, and is held and held by the string holder 42 first when the string is cut. Since the cord portion 4c is in an extremely elongated state due to the winding action, when the sandwiched state is released, the cord portion 4c comes off from the loop portion formed by the knot building 43, and the knot of the tying string is knotted. However, it becomes a so-called single-knot state (see FIG. 21). As a result, when the rubber string 4 is removed from the tied object a, when the above-mentioned single string portion is pulled, the number of passing strings in the loop of the knot is one, and the stretching action of the rubber string and the rubber string From the sliding action by the formed irregularities 4b,
It can be easily pulled out, and after falling out of the loop, the remaining loop acts so as to spread, so that the binding state can be easily released. In addition, since the knot building 43 and the string holder 42 are provided so that their respective drive shafts are parallel to each other, when the winding operation by the string holder 42 is performed, the two string portions positioned between the knot building 43 and the knot building 43 are arranged. The posture and the rotation direction of the string holder 42 are substantially parallel, and the knot operation is not hindered by being wound around the arrangement portion of the holding spring 42a (FIG. 19). In addition, by forming the streaky irregularities 4b on the surface of the rubber string 4, the holding action by the string holder 42 can be appropriately slipped in the longitudinal direction and a proper holding force can be maintained, and the holding action is smooth. Can be done. Then, when the needle is retracted to the standby position, the winding of the string is loosened from the guide roller 40, and the rubber string 4 is drawn out of the storage section 5 with the retraction operation.

The detection piece 27 of the hand switch SW2 is adapted to be screwed so as to be vertically adjustable and fixed to the switch main body. When a box, a magazine with an appendix, or the like is to be bound with a rubber cord, the detection piece 27 is lowered to a position lower than the work surface 7a of the work table 7 as shown by a virtual line in FIG. Set it to enter the lower side. At this time, the changeover switch SW3 is switched to the side of the foot switch SW1, the object to be bound is transferred to the binding position, and the binding is operated by operating the foot switch SW1. In this way, even when the box-shaped objects to be tied are tied in a cross shape, there is no protrusion from the work table 7, so that the harmful effect that the already tied cord is caught and hinders the transfer can be prevented, and smooth operation can be prevented. A simple binding operation can be performed.

[Another embodiment] The detecting piece 27 of the hand switch SW2 may be detachable in place of the one that can adjust the position, or the detecting piece 27 may be attached to the work surface 7a of the worktable 7. It may be configured to be set in a non-operating position by being locked and held by a locking tool in a position where it is pushed downward from above.

In the claims, reference numerals are provided to facilitate comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a general-purpose binding machine.

FIG. 2 is a longitudinal side view of a general-purpose binding machine.

FIG. 3 is a longitudinal sectional side view of a general-purpose binding machine.

FIG. 4 is a cross-sectional plan view of a general-purpose binding machine.

FIG. 5 is a side view of a part where a one-turn clutch mechanism is provided.

FIG. 6 is a side view of the needle drive system.

FIG. 7 is a side view of a driving cam mechanism of the string pulling member.

FIG. 8 is a diagram for explaining the operation of the string pulling member.

FIG. 9 is a side view of the string feeding section.

FIG. 10 is a perspective view of a string guide member.

FIG. 11 is a cross-sectional view of an elastic cord.

FIG. 12 is an explanatory view of a binding operation.

FIG. 13 is an explanatory view of a binding operation.

FIG. 14 is an explanatory diagram of a binding operation.

FIG. 15 is an explanatory diagram of a binding operation.

FIG. 16 is an explanatory diagram of a binding operation.

FIG. 17 is an explanatory view of a binding operation.

FIG. 18 is an explanatory view of a binding operation.

FIG. 19 is a side view of the string knot mechanism.

FIG. 20 is a diagram illustrating the operation of the string guide plate.

FIG. 21 is a perspective view of an object to be bound after the binding.

FIG. 22 is an electric circuit diagram

[Explanation of symbols]

 Reference Signs List 2 Drive source 3 Binding mechanism 7 Work table 7a Work surface 18 One-turn clutch mechanism 27 Detecting piece SW1 Operation switch SW2 Passage detection switch

Claims (1)

(57) [Claims] A bundling mechanism (3) for bundling an object to be bound placed and transported along a work table (7);
A passage detection switch (SW2) having a detection piece (27) protruding upward from the worktable (7) at a place where the object to be bound of the worktable (7) is transferred, and an operation switch (SW) for stepping operation
1), and when the passage detection switch (SW2) detects that the binding object has passed, or when the operation switch (SW1) is operated, a driving source (2) and the binding mechanism ( 3) to operate the one-rotation clutch mechanism (18) interposed therebetween to perform the bundling operation, and the detection piece (27) projects upward from the work surface (7a) of the work table (7). Operating state and the work surface (7
A general-purpose binding machine configured to be freely switchable to a non-operating state that does not protrude from a).