JPH0454773Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a valley ventilation system for multi-building greenhouses.

(Prior Art) Conventionally, a winding shaft is arranged in the ceiling valley of a multi-unit greenhouse, and by rotating the winding shaft, the end edge of the ceiling covering sheet is rolled up or rewound to open and close. As a valley ventilation system for a ridge greenhouse, for example, there is a ventilation system according to Utility Application No. 166048/1983, which was previously filed by the present applicant. In this ventilation system, a drive shaft equipped with a prime mover and a speed reducer is placed near the outer end of the gable side of the multi-building greenhouse, a relay drum is placed on the outside of the gable side of each greenhouse, and a winding shaft is placed on the gable side of the greenhouse. A winding drum is attached to the end projecting outward, and power transmission wires are provided between the drive shaft and the relay drum, between the relay drum and the winding drum, and between the relay drums.
The rotation of the drive shaft is transmitted to the relay drum and the winding drum via a wire, so that the winding shaft rotates.

(Problem to be solved by the invention) However, in such conventional ventilation systems, relay drums are arranged on the outside of the gable side of the greenhouse in each building, and there are problems between the drive shaft and the relay drum, between the relay drum and the winding drum, and between the relay drums. Since power transmission wires are strung between the two, the structure is complicated and installation is time-consuming. In addition, since a winding wire for winding up the ceiling covering sheet and an unwinding wire for unwinding the sheet are used as power transmission wires, both the winding and unwinding wires can be maintained in a well-balanced tension state. The problem is that the wires become loose and slack, making it difficult to open and close the seat smoothly.

(Means for Solving the Problems) In order to solve the above problems, the valley ventilation system of the multi-building greenhouse according to the present invention has winding shafts arranged almost horizontally in the ceiling valleys of the multi-building greenhouse. In the valley ventilation system for multi-building greenhouses, which opens and closes the edges of the ceiling covering sheets of each building simultaneously by rolling up or unwinding them by rotating the A rotating drum is attached to the protruding end of the drive shaft, a winding drum is attached to the end of the winding shaft protruding outward from the gable of the greenhouse, and A turn pulley consisting of a fixed pulley and a movable pulley is placed near the end of the gable, one end of the main wire for power transmission is wrapped around the rotating drum, and the other end is connected to the movable pulley of the turn pulley to transmit power. One end of the slave wire for transmission is fixed to the fixed pulley support part of the turn pulley and is sequentially routed around the movable pulley and the fixed pulley, and the other end is sequentially wound and stretched around the winding drum. .

(Example) The present invention will be described below with reference to the drawings.

In the drawings, reference numeral 1 denotes a winding shaft, which is arranged substantially horizontally along each ceiling trough 81 of the multi-building greenhouse 8. The winding shaft 1 is an elongated body extending along the troughs 81, and can be opened and closed by winding up or unwinding the end edge of the ceiling covering sheet 82 of the greenhouse 8. Further, a winding drum 11 is attached to an end portion of the winding shaft 1 that projects outward from the greenhouse end surface 83. In order to more reliably wind up the sheet on the winding shaft 1, one end of the anti-slip spring 7 is attached to the winding shaft 1 or the winding drum 11, and the other end is tensioned in the opposite direction to the sheet winding direction. It is designed to prevent slipping when winding up the sheet.

2 is a drive shaft, which is equipped with a prime mover 21 and a speed reducer 22 inside the gable surface 83 at an appropriate location of the multi-building greenhouse 8;
It is arranged so as to protrude outside the end face 83. The drive shaft 2 is generally arranged in the middle of the greenhouse gable 83 in the frontage direction. A rotating drum 23 is attached to the end of the drive shaft 2 that protrudes from the end surface 83.
Further, the prime mover 21 is connected to a limit switch 24 on the inside of the end face 83, and is also connected to a control section 5 with a built-in computer, and the control section 5 is connected to a temperature sensor 6, so that when the temperature inside the greenhouse 8 reaches a preset temperature, control is performed. Section 5, limit switch 24, reducer 22
The prime mover 21 is operated for a predetermined period of time via.

3 is a turn pulley, which is arranged near the end of the temperature gable surface 83 in the frontage direction. turn pulley 3
consists of a fixed pulley 31 and a movable pulley 32, and the fixed pulley 3
1 is supported by a support portion 33 in the form of a pillar.

4 is a power transmission main wire, and 4' is a power transmission slave wire, which transmits the rotation of the drive shaft 2 to the winding shaft 1 via the rotary drum 23, the turn pulley 3, and the winding drum 11. be. One end of the power transmission main wire 4 is wound around the rotating drum 23, and the other end is connected to a movable pulley 32 and stretched. One end of the power transmission subordinate wire 4' is fixed to the fixed pulley support part 33, and is sequentially routed around the movable pulley 32 and the fixed pulley 31, and the other end is fixed to the fixed pulley support 33, and the other end is sequentially attached to the winding drum 1.
1 and is stretched so as to connect the winding drums 11, 11, . . .

Thus, in the ventilation system of the present invention, the drive shaft 2 is rotated during ventilation, the main wire 4 for power transmission is wound around the rotating drum 23, and the tensile force of the wire 4 causes the drive shaft 2 to rotate through the movable pulley 32 and the fixed pulley 31. The power transmission slave wire 4' is pulled, and each winding drum 11 is rotated accordingly, and the edge portion of the ceiling covering sheet 82 is wound up on the winding shaft 1.
Furthermore, when the ventilation is finished, the drive shaft 2 is rotated in the opposite direction to the above,
By unwinding the power transmission main wire 4 of the rotating drum 23, the power transmission slave wire 4' is moved in the opposite direction to the above, and the winding shaft 1 is rotated by its own weight to its original position, and the ceiling covering sheet 82 The edge portion of the tape is rewound.

In the above embodiment, the winding shaft 1 is arranged only on one ridge across the valley 81 of the multi-building greenhouse 8, and only one edge of the ceiling covering sheet 82 can be opened and closed. A winding shaft 1 is provided facing both ridges with a valley 81 in between, and the ceiling covering sheet 8
Both end edges of 2 may be opened and closed. In this case, in addition to the device of the example,
The turn pulley 3 is arranged near the other end in the frontage direction of the end face 83, and the power transmission main wire 4 and the power transmission slave wire 4' can rotate the newly installed winding shaft 1 in the same manner as described above. It should be stretched like this.

(Effects of the invention) As detailed above, in the ventilation system of the present invention, one end of the main wire for power transmission is wrapped around the rotating drum of the drive shaft, and the other end is connected to the movable pulley of the turn pulley. One end of the service wire is fixed to the fixed pulley support part of the turn pulley and is sequentially routed around the movable pulley and the fixed pulley, and the other end is sequentially wound and stretched around the winding drum of the winding shaft. Therefore, there is no need to use two types of wires for winding up and unwinding as in the past, and the ceiling covering sheet can be opened and closed smoothly without loosening or sagging of the wires. Moreover, by using the turn pulley, the tensile strength of the power transmission main wire can be reduced, and the power transmission slave wire can be adjusted, that is, the winding width of the ceiling covering sheet can be adjusted.

Further, unlike the conventional method, a relay drum is not required, and the rotating drum and the winding drum are connected by wires and pulleys, so the structure is simplified and installation is easy.

Furthermore, since the prime mover of the drive shaft and the speed reducer are arranged inside the gable side of the greenhouse, the drive parts can be protected from wind and rain by the greenhouse, and no breakdown will occur.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of the ventilation device of the present invention, and FIG. 2 is a front view of the ventilation device. DESCRIPTION OF SYMBOLS 1... Winding shaft, 11... Winding drum, 2... Drive shaft, 21... Prime mover, 22... Speed reducer, 23...
... Rotating drum, 3 ... Turn pulley, 31 ... Fixed pulley, 32 ... Moving pulley, 33 ... Support part, 4 ... Main wire for power transmission, 4' ... Subordinate wire for power transmission, 8 ... Greenhouse, 81... Tanibe, 82... Ceiling covering sheet, 83... Gable.

Claims (1)

[Scope of utility model registration request] A winding shaft 1 is installed in each of the ceiling valleys 81 of the multi-building greenhouse 8.
In a valley ventilation system for a multi-building greenhouse, the greenhouse is arranged almost horizontally, and the edges of the ceiling covering sheet 82 of each building are simultaneously rolled up or unwound to open and close by rotating the winding shaft 1. 8, a drive shaft 2 equipped with a prime mover 21 and a reducer 22 is disposed inside the end surface 83 so as to protrude outside the end surface 83, and a rotating drum 23 is attached to the projecting end of the drive shaft 2, and a winding shaft A winding drum 11 is attached to the end of the greenhouse gable 83 that projects outward, and a turn pulley 3 consisting of a fixed pulley 31 and a movable pulley 32 is arranged near the end of the greenhouse gable 83 for power transmission. One end of the main wire 4 is wound around the rotating drum 23, the other end is connected to the movable pulley 32 of the turn pulley 3, and one end of the slave wire 4' for power transmission is connected to the fixed pulley support part 33 of the turn pulley 3. The other end is fixed to the winding drum 1 and is sequentially wrapped around the movable pulley 32 and the fixed pulley 31.
A valley ventilation system for a multi-building greenhouse that is wrapped and stretched around 1.