JP2738477B2 - 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 knotter building in which a string supply needle which swings around a horizontal axis is arranged above a work table and a knotting operation of the string supplied below the work table is performed. The present invention relates to a general-purpose binding machine having a knot mechanism of a type, and having a one-turn clutch mechanism interposed between a transmission shaft for transmitting a driving force to each of the needle and the knot mechanism and a rotating body that is constantly driven to rotate.

[0002]

2. Description of the Related Art In the above-mentioned general-purpose binding machine, conventionally, as proposed by the present applicant in Japanese Utility Model Application No. 3-36314, the power of an electric motor is connected to a needle and a knot mechanism via a one-turn clutch mechanism. The single-rotation clutch mechanism has an idler gear that is constantly driven to rotate on the driven shaft, and slides in the axial direction with respect to the idler gear and the shaft. An occlusal clutch is formed between a freely and integrally rotatable shift member, and a locking plate that fits between them and maintains the shift member at the clutch disengagement position is provided. The locking plate is operated by an electromagnetic solenoid. When the shift member makes one rotation, the engaging plate is actuated by the guide cam portion formed on the side surface of the shift member, and the shift member is shifted to the clutch disengaged position. It had been configured to drive one rotation by causing. The clutch disengagement action portion of the guide cam portion is formed in a small area in the circumferential direction so that the above-described guide operation of the locking plate can be reliably performed.

[0003]

SUMMARY OF THE INVENTION The above-mentioned structure is designed to increase the safety in operation by disposing a needle which pivots largely in the binding operation at a position above the worktable where the operator can easily see it. It is. However,
In the above-mentioned conventional structure, there is no problem when a normal bundling operation is performed.However, for example, during transportation, a needle that protrudes upwards greatly hinders work or increases a storage space. When the needle is stored in a state where it is manually pushed down to the workbench side, the above-mentioned shift member rotates with the movement of the needle, and the locking plate is disengaged from the clutch disengaging portion of the guide cam. , May be set to a clutch engaged state. Then, when the electric motor starts driving next time, the needle and the knot mechanism may be activated at the same time when the power switch is turned on and operated contrary to the intention of the operator, which is dangerous, so that the space saving as described above is performed. There was a drawback that storage was not possible. An object of the present invention is to eliminate the above disadvantages.

[0004]

According to a feature of the present invention, in the general-purpose binding machine described at the beginning, the rotating body is slidably slidable between a state in which the rotating body is engaged with the transmission shaft and a clutch disengaged state for releasing the engagement. On the outer peripheral surface of the rotating body that rotates in the occlusal state while being fitted to the occlusal side while being moved and biased,
The one-rotation clutch mechanism is provided by providing a one-rotation operating member that slides and guides to a clutch disengagement position by a guide cam formed on a rotating body and slides between an operation posture and a clutch engagement position that retreats outward. In addition, the present invention is characterized in that the clutch disengaging portion of the guide cam is formed over a rotation area where the needle moves from the upper standby position to a position near the operation start position of the knot mechanism.

[0005]

In a standby position in which the one-rotation operating member is set at the clutch disengagement position and is in contact with the clutch disengagement action portion of the guide cam, the operation of the knot mechanism is started by manual operation to retract the needle by manual operation. Even if it is moved to a position close to the position, the operation member for one rotation keeps the clutch disengaged state by the clutch disengagement action part of the guide cam, so it will be unexpectedly tied even if the drive is started next time for the bundling work There is no operation.

[0006]

Therefore, while being able to secure the operational safety during the binding operation, it can be used during storage and transportation.
Even if the storage space is reduced with the needle that protrudes upwards pushed down to a low position that does not get in the way, there is no adverse effect such as unexpected start of operation at the next work, and a practically useful universal binding machine is provided. I can do it.

[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 soft and long vegetables such as cut flowers, leeks, and asparagus using rubber strings. 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 rubber cord 4 for binding is wound and stored above the outside of the box 1. ,
A needle 6 for supplying the rubber string 4 from the winding string storage section 5 toward the knot mechanism 3, and the object to be bound a is artificially placed along the upper work table 7 of the box 1. It is configured to supply and tie up. The electric motor 2
A transmission belt 14 is stretched between a pulley 9 provided on the output shaft 8 and a pulley 13 provided on a relay shaft 12 supported by a bearing member 10 erected from the bottom of the box body 1.
2 is engaged with a large-diameter gear 17 which is fitted around the driven shaft 16 in a freely rotatable manner.
A one-turn clutch mechanism 18 is interposed between the drive shaft 7 and the driven shaft 16. A driving crank mechanism 19 for driving the needle 6 is provided at one end of the driven shaft 16, and is linked to a driving shaft 21 of the knot mechanism 3 via a bevel gear mechanism 20 provided at the other end to branch off. It has been transmitted. As shown in FIGS. 4, 5, and 24, the one-rotation clutch mechanism 18 includes a pawl clutch 22 between the large-diameter gear 17 and the driven shaft 16 (an example of a transmission shaft).
Between the driven side meshing portion 22a of the pawl clutch 22 [an example of a shift member] and the drive side meshing portion 22b [an example of a rotating body] that rotates integrally with the gear 17, a shaft radially inward from above. The locking plate 23 (an example of an operation member for one rotation) is inserted in the pressing and biased state to set the clutch in a disengaged state, and the locking plate 23 is actuated by the electromagnetic solenoid 25 via the operation plate 24. By driving and swinging in a direction away from the claw 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 guide cam 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. 23, a clutch disengaging portion 26a connected to the inclined guide cam 26 is formed from the clutch disengaging position to a rotation region of substantially 90 degrees, and the needle 6 is moved to the upper standby position [the position shown in FIG. ] To a position near the operation start position of the knot mechanism 3 (position indicated by a virtual line in FIG. 3), the clutch disengaged state is maintained. The electromagnetic solenoid 25 is connected to a foot switch SW1 or a hand switch S
It is configured so as to operate only for a short time by any operation of W2. A changeover switch SW3 is provided which can be switched between a state using the foot switch SW1 and a state using the hand switch SW2. 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.
In other words, the boss 30 is externally fitted to the rotating shaft 29 rotatably supported by the needle support case 28 so as to be integrally rotatable, and the support arm 31 bent in a V shape from the boss 30 is extended. The needle 6 is connected to the tip of the support arm 31. Then, a drive arm 32 attached to the rotary shaft 29 and the crank mechanism 19 are interlockedly connected via a push-pull rod 33 inside the needle support case 28, and the drive arm 32, The rubber cord 4 is supplied to the knot mechanism 3 by oscillatingly driving the needle 6 over a predetermined range. Needle 6
Is biased 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 to a predetermined standby position. It is configured not to stop at an unstable position displaced downward from above. As shown in FIG. 1 to FIG. 3 and FIG.
The support rod 35 is rotatably supported by a support member 35 extending from the needle support case 28, and a slack removing rod 37 acting on the payout string is provided. A pair of string guide rollers 39 and 40 are attached to the distal end of 38. A guide roller 4 which is located on the lower side of the supply of the supply string.
After being wound once around 0, the guide roller 40 is supplied to the needle 6, and the guide roller 40
By pressing the button 1, the degree of feeding 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 sets a new string portion supplied by the needle 6 and a held string portion in an overlapped state. It has a holder 42 and a knot building 43 that operates by knotting by winding the two overlapping string portions as described above, and the string holder 42 and the knot building 43 are arranged such that their respective rotational drive axes are parallel to each other. And a pair of timing gears 4 for driving them.
5 and 46 are attached to the nodal drive shaft 21. A locking groove 43a for preventing the string from shifting is formed in the string holding portion of the knot building 43. Then, at the position near the upper side of the knot building 43, at the time of the string winding operation of the knot building 43, that is, the rubber string portion held and held by the string holder 42 and the rubber string portion after winding the object to be bound are placed. When winding to form a knot, a string guide member 47 for locking and holding each of the string portions at a predetermined affected position is provided.
A moving means A is provided for moving the string guide member 47 in a direction substantially perpendicular to the direction in which the needle 6 supplies the string after the cord winding operation by the cord 3 is completed. More specifically, as shown in FIG. 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 enter and engage along the moving direction of the binding object a. A stop recess 48 is formed, and is pivotally supported by the support bracket 44 by a swing support arm 49 so as to be swingable about an axis along the axis of the knot drive 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. As shown in FIG. 10, the knot building 43 is attached to the lower end of the string guide member 47 in the moving direction.
A notch concave portion 47a having a shape substantially conforming to the external shape is formed. With this configuration, even when a thick rubber string having a large tension is used, the rubber string 4 is pulled out while directly handling the string portion wound around the knot building 43, so that a sufficient knot is formed. There is an advantage that a knot operation can be performed.
Note that the rotation shaft 29 of the needle 6 is disposed so as to be located substantially in the middle between the rotation axis of the knot building 43 and the rotation axis of the string holder 42. The needle support case 28 is provided in an inclined posture so that a large knot space can be taken. In the vicinity of the string guide member 47, a string pulling member 53 that can be switched between a retaining position for closing the entrance portion of the locking recess 48 and a position for opening the entrance portion is provided. At the time of operation, a posture switching means B for switching the string pulling member 53 to the retaining posture is provided. That is, as shown in FIG. 8, the string pulling member 53 is pivotally supported by the support bracket 44 so as to be swingable about an axis X2 orthogonal to the axis of the knot drive shaft 21, and is swung toward the open position by the spring 54. The cam follower 5 which is energized and connected
5 is configured to abut on a cam 56 provided on the nodal drive shaft 21 to perform a switching swing operation. Further, between the knot building 43 and the string holder 42, a string guide plate 57 for regulating the rubber string 4 having one end held by the string holder 42 at a predetermined standby position when the needle 6 is withdrawn is provided.
The string guide plate 57 is arranged so as to approach the outer end rotation locus of the string cutting cutter 58 provided in the string holder 42 at a minute interval smaller than the thickness of the rubber string.

Next, a binding operation procedure will be described. FIG.
2 to 18 show an operation procedure. 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 tied a near the binding action point, the object to be tied a is switched to the hand switch SW2.
, The one-turn clutch mechanism 18 is operated to drive the driven shaft 16 one turn. 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 guide roller 4
The cord wound around 0 is further wound in the direction in which the cord is wound with the operation of the needle 6, and the feeding of the cord 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 rotationally driven to wind the string portion 4c held by the string holder 42 and the string portion 4d supplied by the needle 6 together to start the knot operation. At this time, the string guide member 47
Is set to the working position. Thereafter, when the needle 6 reaches the maximum entry position, the string holder 42 is rotated from that point to align the two string portions 4c and 4d to form the knot building 43.
Act to be wound up. And knot building 4
When the winding operation of No. 3 is completed, the string pulling member 53 is switched to the open position, and the cutting cutter 58 provided on the string holder 42 approaches the string guide plate 57 to cut both string portions. The guide member 47 swings laterally from the action posture, pulls out the string wound around the knot building 43, and the knot operation ends. At this time, as described above, since the rubber cord 4 is hardly extended from the needle 6 side, the rubber cord 4 during the knot operation is in an extended state, and when the cord is cut, the rubber cord 4 is first held by the string holder 42. Since the held string portion 4c is in an extremely elongated state due to its winding action, when cut, the string portion 4c comes off from the knot portion of the knot building 43, and the knot of the object to be tied becomes It is in a so-called union knot state (FIG. 21). As a result, when the rubber string 4 is removed from the tied object a, when the one string portion is pulled,
The rubber cord can be easily removed from the stretching action of the rubber cord and the sliding action of the unevenness 4b formed on the rubber cord. Moreover,
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 posture of the two string portions positioned between the knot building 43 and The rotation direction of the string holder 42 is substantially parallel to the knot spring 42a, so that the knot operation is not hindered. In addition, by forming streaky irregularities 4b on the surface of the rubber string 4, the string holder 4
In the pinching action by 2, the pinch element slides appropriately in the longitudinal direction and can maintain an appropriate pinching force, so that the holding action can be performed smoothly. 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 retracted by the retraction operation.
It is paid out from.

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 side 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

FIG. 23 is a cutaway side view of the one-turn clutch mechanism.

FIG. 24 is an exploded perspective view of an occlusal clutch.

[Explanation of symbols]

 3 Knotting mechanism 6 Needle 7 Work table 16 Transmission shaft 17 Rotating body 18 One-turn clutch mechanism 22a Shift member 26 Guide cam 26a Clutch disengaging section

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Hei 3-41540 (JP, U) Japanese Utility Model Hei 3-71718 (JP, U)

Claims (1)

(57) [Claims] 1. A string supply needle (6) that swings around a horizontal axis is provided above a work table (7), and a knot operation of a string supplied below the work table (7) is performed. And a knot mechanism (3) of a knotter building type for performing a drive, between a transmission shaft (16) for transmitting a driving force to each of the needle (6) and the knot mechanism (3) and a rotating body (17) which is constantly driven to rotate. A general-purpose binding machine having a one-turn clutch mechanism (18) interposed therebetween, wherein the rotating body (17) is connected to the transmission shaft (1).
6) The shift member (22a), which can be switched between the state of interlocking engagement and the clutch disengagement state of releasing the occlusion, is externally fitted to the transmission shaft (16) while being slidable and urged toward the occlusal side. A guide cam (26) formed on the shift member (22a) rides on the outer peripheral surface of the shift member (22a) which rotates in an occlusion state, and a one-rotation operation member (23) which slides and guides to the clutch disengagement position acts. The one-rotation clutch mechanism (18) is provided so as to be freely switchable between a posture and a position where the clutch retracts outward, and the clutch disengaging portion (26a) of the guide cam (26) is connected to the needle ( 6) is a general-purpose binding machine formed over a rotation area that moves from the upper standby position to a position near the operation start position of the knot mechanism (3).