JP2848205B2 - Lawn sheet packing and winding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for winding a lawn grown in a mat shape, and for unwinding the wound lawn and laying it on the ground.

[0002]

2. Description of the Related Art After growing a lawn, soil is put on a net-like rug, sowed with lawn seeds, and the lawn is grown in a mat shape so that it is easy to collect and transplant the grass to another place. rear,
The present applicant has already considered a technique of collecting the lawn by winding the rug and transplanting the lawn to another place. Also, a technique has been disclosed in which a base is made of fine bark flakes and a lawn is grown on the base to form a mat.
5035). The present applicant has already applied for a device for winding or unwinding such a mat-like lawn (Japanese Patent Application No. 5-1830).
61).

[0003]

However, when the mat-shaped lawn is wound up and collected from the breeding ground, the roots of the lawn are entangled with the soil of the breeding ground, and it is difficult to wind the lawn properly.
In addition, for example, when a lawn is laid on an artificial turf and a soccer game is played, when the lawn is to be rolled up and collected again, the root of the lawn is entangled with the artificial turf leaf, making it difficult to wind up. Becomes If the mechanical force by the device is applied to the lawn too strongly, the lawn is damaged, and if the mechanical force is weak, the winding operation does not proceed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and is a lawn capable of performing a winding operation quickly without damaging the lawn and capable of adjusting the rotation speed well. An object of the present invention is to provide a packing and winding device.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above objects, the present invention provides a winding shaft mechanism for winding or unwinding a mat-like lawn, and a speed reducer for changing the rotation speed of the winding shaft mechanism. And a worm gear that transmits a rotational force from the speed reducer to the winding shaft mechanism.

[0006]

The rotation speed of the winding shaft mechanism is changed according to the change in the diameter of the wound lawn roll, so that the lawn winding force can be adjusted. When the rotation speed is reduced due to the characteristics of the worm gear, a braking effect works.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1, the lawn sheet packing and winding device 1 winds or unwinds a lawn 19 while being lifted and moved by a forklift 3. The claw (fork) 5 of the forklift 3 moves up and down along the guide 7, and the angle of the up-down direction can be changed by tilting the guide 7 by the hydraulic cylinder 9.

A space 13 is formed in the underframe 11 of the lawn bedding and winding device 1 in which the claw 5 of the forklift 3 is inserted. That is, the pedestal 15 below the underframe 11 has
A space 13 into which the claw 5 is inserted from the rear is formed in the front-rear direction. On this pedestal 15, a pair of arc-shaped frames 17 is provided. In this frame 17,
A winding shaft mechanism 21 for winding or unwinding the mat-like lawn 19 is provided.

That is, as shown in FIGS. 2 and 3, a concave portion 25 for receiving both ends of the winding shaft 23 is formed at the arc-shaped top of the frame 17. A plurality of rollers 27 are arranged in the recess 25 in a semicircular shape. These rollers 27 come into contact with a guide tire 29 provided at the end of the winding shaft 23 and rotate the winding shaft 23 with small friction. A rotating gear 31 is provided coaxially and detachably on the shaft end side further than the guide tire 29. That is, as shown in FIGS. 3 and 5, a key groove 32 is formed in the hollow shaft portion of the winding shaft 23 and the shaft hole of the rotating gear 31, and a keyed spindle 32a is fitted into these in the axial direction. By being removably fitted,
The rotary gear 31 and the guide tire 29 are configured to be fixed to the winding shaft 23, and a keyed spindle 32a
Can be easily disassembled, and the rotating mechanism can be appropriately maintained as needed.

An intermediate gear 33 meshes with the rotating gear 31. A worm gear 35 meshes with the intermediate gear 33. The worm gear 35 is connected to the drive housing 37 via a universal joint 36.
, And a motor 39. The rotating gear 31 and the intermediate gear 33 have the same module. In contrast, the worm gear 35 has a different tooth module. Due to the characteristics of the worm gear 35, even when the winding shaft 23 tries to keep rotating due to a large inertia, it has a braking effect, so that the rotation speed can be easily reduced. Further, a control device 40 for controlling the electric motor 39 and the speed reducer 38 is provided. That is, as shown in FIG. 4, a voltage change of the electric motor 39 is monitored by the voltmeter 41. The load changes as the diameter of the lawn 19 roll changes, and as a result, a change in voltage is detected. The control device 40 receiving this detection signal causes the variable resistor 42
, The current value from the battery 43 to the electric motor 39 is controlled, and further the speed reducer 38 is controlled. When the diameter of the wound lawn 19 is large, the rotation speed is reduced, and when the diameter is small, Is controlled to increase the rotation speed.

An arm 45 is provided in front of the frame 17 of the underframe 11. The arm 45 is provided in a pair on the left and right sides of the underframe 11, rotates around the rotation shaft 47, and the tip moves vertically. This rotation is performed by a hydraulic cylinder 49. At the tip of the arm 45, a claw 5 for peeling off the lawn 19
1 is provided. Further, in order to hold the position of the lawn 19 with respect to the claw 51, a pair of pressing rollers 53 that sandwich the lawn 19 are provided.

The details will be described below with reference to FIGS. 2 and 3. That is, the rear ends of the pair of arms 45 are connected by one rod 55. A hydraulic cylinder is provided at the center of the rod 55 to rotate the pair of arms 45 simultaneously. At the end of the arm 45, a clamping roller mounting bracket 5 is provided.
7 is rotatably attached by a pin 59. The mounting bracket 57 is elastically supported by a spring (not shown). A pair of squeezing rollers 53 are attached to the mounting bracket 57 so as to sandwich the lawn 19. The pair of pressure rollers 53 are urged to press each other by a spring (not shown). Thereby, the lawn 19 is nipped and held by an appropriate force.

A claw 51 is provided near the lower pressing roller 53 of the pair of pressing rollers 53. The claw 51 maintains a predetermined posture with respect to the lower pressing roller 53.

Further, a guide roller 63 is provided on a rotation shaft 47 of the arm 45 via a guide arm 65. The distal end of the guide arm 65 is provided with the distal end of a coil spring 67, and the rear end of the coil spring 67 is attached to the frame 17. Thereby, the guide arm 65 always receives the force caused by the coil spring 67. The induced force causes the guide roller 63 to push the lower surface of the lawn 19 upward.

The operation of this embodiment will be described below.
First, the winding of the lawn 19 will be described. When winding, the claw 5 of the forklift 3 is inserted into the space 13 of the underframe 11 of the lawn paving and winding device 1, and the device 1 is lifted. The end of the mat-like lawn 19 passes between the pressure rollers 53, passes over the guide rollers 63, and is wound around the winding shaft 23 from above. In this state,
The forklift 3 moves forward, and the electric motor of the drive housing 41 operates to rotate the winding shaft 23 to wind the lawn 19. At this time, the arm 45 is
The lower claw 9 lowers the claw 51 into the grass 19. Since the position of the lawn 19 with respect to the claw 51 is held by the pressing roller 53, the claw 51 comes into contact only with the root of the lawn 19 and peels off the lawn 19 without damaging the lawn 19.
The pressing roller 53 and the claw 51 are elastically supported by the arm 45 by a spring 61, and peel off while receiving the lawn 19 softly. If the root of the lawn 19 is strongly entangled with the growing ground or the leaf of the artificial turf, the forklift 3 is moved forward and the winding shaft 2 is moved.
The rotation of the arm 4 is temporarily stopped by the hydraulic cylinder 49.
5 can be lifted and the root at that portion can be strongly peeled off with the claw 51 at the tip.

The diameter of the roll of the lawn 19 that has been peeled off and wound up gradually increases. Grass 19
Is weaker, the force of the guide roller 63 pushing up the lower surface of the lawn 19 overcomes and rises. Thereby, even if the diameter of the roll of the lawn 19 changes, it is possible to prevent the lawn 19 from unnecessarily loosening between the pressing roller 53 and the winding shaft 23 and exerting an excessive force.

When the diameter of the wound lawn 19 roll increases, the load applied to the winding shaft mechanism 21 increases. As the load increases, the voltage applied to the electric motor 39 changes. The voltmeter 41 detects this change, and detects that the load has increased. The control device 40 to which the detection signal is input controls the current value to the speed reducer 38 and the electric motor 39 to reduce the rotation speed of the worm gear 35. Thereby, since the rotation speed of the winding shaft 23 can be reduced, the winding speed of the lawn 19 can be kept within a substantially constant range.

As described above, during winding, the rotation speed of the winding shaft 23 is gradually reduced, and the characteristics of the worm gear 35 are useful for this reduction. That is, the winding shaft 23 that has been rotating at a high rotation speed until then tends to rotate at a high rotation speed as it is due to inertia.
On the other hand, the worm-type gear 35 attempts to transmit a torque corresponding to the current of the electric motor 39 via the speed reducer 38.
The worm-type gear 35 does not lose its inertial force on the rotating gear 31 side and rotates with it, unlike a normal spur gear, but rather applies a brake to the rotating gear 31 to easily reduce the rotation speed. Thus, the winding speed of the lawn 19 is made more constant, and even if the forklift 3 moves forward at a constant speed, it is possible to prevent an excessive force from being applied to the lawn 19. The winding speed is, for example, about 30 cm or more per second.

When the winding is completed, the forklift 3
Transports the lawn 19 to a predetermined position while lifting the apparatus 1 of this embodiment.

Next, unwinding will be described. The unwinding operation is substantially the reverse of the winding operation. That is, while the forklift 3 is moving backward, the electric motor 39 of the drive housing 37 is moved.
Rotates the winding shaft 23 in the reverse direction. When the lawn 19 is unrolled and spread, the diameter of the roll of the lawn 19 changes and decreases. Then, as the diameter of the roll decreases, the load decreases, and the voltage of the electric motor 39 changes in a direction opposite to the winding, so that the control device 40 works to increase the rotation speed of the worm gear 35. . In this way, also during unwinding, the unwinding speed can be kept within a certain range.

Although the diameter of the lawn 19 roll is reduced by being unwound, the operation of the guide roller 63 and the operation of the control device at this time are the same as those at the time of the winding, so that the lawn 19 is unreasonable. Prevents the application of force. or,
Also at the time of unwinding, the tip of the arm 45 is lowered,
Therefore, the lawn 19 is brought close to the ground and is laid accurately. When the unwinding is completed and the winding shaft 23 becomes empty,
The forklift 3 transports the apparatus 1 to a predetermined place as it is, lifts and transports another apparatus 1 (having the lawn 19 wound on the winding shaft 23), unwinds the lawn 19 again, and spreads the work. continue.

As described above, according to the lawn bedding winding device 1 of this embodiment, the rotation speed is adjusted according to the change in the diameter of the roll of the lawn 19 that has been wound, and the winding speed or the winding speed is adjusted. The dispensing speed can be kept within a substantially constant range. Therefore, no excessive force is applied to the lawn 19.
In addition, the forklift 3 can move forward or backward at a constant speed to perform a winding or unwinding operation, thereby performing a stable operation.

Also, the roots of the lawn 19 are entangled with the soil of the breeding ground,
Or, even if there is a state in which the leaves are
The root can be peeled off by the claw 51 at the tip of the 5. In addition, the action of the pinching roller 53 allows the claw 51 to accurately contact only the root, thereby preventing the lawn 19 from being damaged. Further, the action of the guide roller 63 prevents the lawn 19 from being loosened and excessive force from being applied even if the diameter of the roll of the wound lawn 19 changes. Further, the pressing roller 5
Numeral 3 is elastically supported by a spring, so that the lawn 19 can be softly received and the lawn 19 can be hardly damaged.

In the above embodiment, the change in the diameter of the roll of the lawn 19 is detected as a change in the voltage applied to the electric motor 39. In other embodiments, for example, FIG.
As shown in (1), a load, that is, a change in the diameter of the lawn 19 roll can be detected by a separately provided load detection sensor 71. The load detection sensor 71 may be configured to detect, for example, a distortion caused by the winding shaft 23 being twisted. The control device 40 to which the signal indicating the increase in the load is input from the load detection sensor 71 adjusts the variable resistor 42 and adjusts the voltage applied to the electric motor 39 in the same manner as described above. In this manner, even if the diameter of the lawn 19 roll changes, the winding speed or unwinding speed can be kept within a substantially constant range.

At this time, more accurate control can be performed by providing an encoder 73 on the electric motor 39 or the winding shaft 23 and performing control while detecting the rotation speed.

In the above embodiment, the rotation speed of the take-up shaft mechanism 21 is automatically changed by the control device 40. However, in other embodiments, the operator performs the operation. May be. That is, since the worker can roughly visually estimate the diameter of the wound lawn 19 roll, the speed reducer 38 is manually operated when the diameter has increased to some extent, and the speed of the winding shaft 23 is increased. The rotation speed of the can be adjusted.

In the above embodiment, the change in the diameter of the lawn 19 roll is regarded as the change in the voltage or load of the electric motor 39. In other embodiments, the unwinding speed of the lawn 19 or the change in the load is considered. The change in the winding speed may be detected and controlled.

[0028]

As described above, according to the lawn sheet packing and winding apparatus of the present invention, when the diameter of the wound lawn changes with the winding or unwinding operation, the winding shaft mechanism is used. By changing the rotation speed, the winding speed or the unwinding speed is kept within a substantially constant range, so that no excessive force is applied to the lawn and the lawn can be prevented from being damaged. Then, since the diameter of the lawn roll increases with the winding operation, the rotation speed is reduced. However, at the time of this reduction, the brake works due to the characteristics of the worm-type gear, and the deceleration is easily performed.

[Brief description of the drawings]

FIG. 1 is an overall side view showing one embodiment of the present invention.

FIG. 2 is an enlarged view showing an apparatus according to the present embodiment, which is a main part of FIG.

FIG. 3 is an enlarged perspective view of a main part of FIG. 2;

FIG. 4 is a control circuit diagram of FIG. 3;

FIG. 5 is a control circuit diagram in another embodiment.

FIG. 6 is an exploded perspective view of a main part of FIG. 3;

[Explanation of symbols]

DESCRIPTION OF REFERENCE NUMERALS 1 lawn sheet packing and winding device 3 forklift 5 fork 7 guide 9 hydraulic cylinder 11 underframe 13 space 15 pedestal 17 frame 19 lawn 21 winding shaft mechanism 23 winding shaft 25 recess 27 roller 29 guide tire 31 rotating gear 33 intermediate gear 35 Worm type gear 36 Universal joint 37 Drive housing 38 Reduction gear 39 Electric motor 40 Control device 41 Voltmeter 42 Variable resistor 43 Battery 45 Arm 47 Rotating shaft 49 Hydraulic cylinder 51 Claw 53 Nipping roller 55 Rod 57 Mounting bracket 59 Pin 61 Spring 63 Guide roller 65 Guide arm 67 Coil spring

Claims (1)

(57) [Claims] 1. A winding shaft mechanism for winding or unwinding a mat-like lawn, a speed reducer for changing the rotation speed of the winding shaft mechanism, and a worm type for transmitting a rotational force from the speed reducer to the winding shaft mechanism. A lawn bedding winding device comprising: a gear.