JP5839536B2 - Ventilation equipment - Google Patents

Description

  The present invention relates to a ventilator, and more particularly, to an improvement of a ventilator that is provided on the end face, roof surface, or side surface of a greenhouse such as a greenhouse and allows ventilation in the greenhouse.

  As is well known, in greenhouses such as greenhouses, ventilators are provided on the wife's surface, roof surface, or side surfaces so that the temperature in the greenhouse is optimal for plants grown in the greenhouse, for example. To.

  For this reason, various proposals have been made for this type of ventilator. Among them, for example, the proposal disclosed in Patent Document 1 is shielded by the rotation of an operating rod having a spiral rib on the outer periphery. The window which is the body is moved to open and close the opening formed by the window frame which is the frame.

  That is, in the place disclosed in Patent Document 1, the greenhouse has a window frame made of an appropriate frame material on the wife surface or the roof surface, and this window frame forms, for example, a rectangular opening. It has a window that matches the opening.

  And when an opening is formed, for example in the wife's face of a greenhouse, the lower side part which is the other side part is suspended downward, while the upper side part which is one side part is pivotally supported by the upper collar part in a window frame. The opening is opened and closed by swinging the operating rod whose upper end is held near the upper collar, that is, the operating rod having a spiral rib on the outer periphery. To do.

  At this time, the upper end portion of the operating rod is connected to the vicinity of the upper collar portion of the window frame in a state in which the movement in the vertical direction and the horizontal direction is restricted, but the lower end portion of the operating rod is Is drooped downward.

  A slider having a configuration in which the operation rod is formed in a substantially cylindrical shape and meshes with a spiral rib of the operation rod is wound around the inner periphery, and a window body is connected to the slider via a link member.

  Therefore, in the proposal disclosed in Patent Document 1, by rotating the operating rod, the slider that is prevented from rotating by connecting the link members moves up and down next to the operating rod, Therefore, the window connected to the slider via the link member swings the lower side portion to open and close the opening.

  Therefore, in the proposal disclosed in the above-mentioned Patent Document 1, the opening and closing of the opening by the window body is practiced not only when the operation rod is rotated manually but also when it is rotated mechanically. And can allow ventilation in the greenhouse.

Japanese Patent Laying-Open No. 2005-245203 (See Claims, FIG. 1)

  However, in the proposal disclosed in Patent Document 1 described above, there is basically no problem in that ventilation in the greenhouse can be practiced by opening and closing the opening by the window body by turning the operation rod. , There is a possibility that it is pointed out that there is a minor defect in its implementation and use.

  That is, in the proposal disclosed in Patent Document 1 described above, when the operating rod is disposed in a vertical direction in which the upper end is upward and the lower end is downward, for example, the upper end is in the vertical and horizontal directions. In a state in which the movement of the direction is prevented, it is rotatably connected to the vicinity of the upper collar portion of the window frame.

  In this operating rod, the lower end portion is also rotatably connected to the lower flange portion of the window frame in a state where movement in the vertical direction and the horizontal direction is prevented.

  Therefore, in the above proposal that enables the opening / closing operation of the window body by rotating the operating rod, it becomes easy to enlarge the ventilation device by having the operating rod itself, and the upper and lower ends of the operating rod A mechanism is required to hold the unit in a state where the movement in the vertical and lateral directions is restricted, and when viewed as a whole, the weight of the entire device is increased, making it easier to install it. In addition, there is a concern that it is difficult to reduce the cost of the entire apparatus, and improvement in versatility cannot be expected.

  Not only in actual operation, but if the number of rotations of the operating rod is not increased, the window body cannot be swung greatly, and if the operating rod is rotated manually, a great deal of labor is imposed on the operator. In addition, when a mechanical force such as a drive motor is used, there is a risk that the wear of the metal portion becomes significant and durability cannot be expected.

  The present invention was devised in view of the above-mentioned circumstances, and the purpose of this invention is to implement predetermined ventilation by opening and closing the opening, but it can be installed without increasing the weight of the entire device. This makes it possible to reduce the cost of the entire device, improve the operability and improve workability, and is expected to improve its versatility. It is to provide a ventilation device.

In order to achieve the above-described object, the configuration of the present invention includes a frame that forms an opening in the end face, roof surface, or side surface of a greenhouse, and a shield that opens and closes the opening when swinging while being pivotally supported by the frame. And a ventilation device having a drive mechanism that realizes swinging of the shield relative to the frame,
A support arm in which the drive mechanism is held by the frame, and a drive arm in which a distal end arm portion projecting outside the support body is coupled to the shield body while a base end worm wheel portion is pivotally supported by the support body A member, and a drive shaft held by the support while meshing a distal end screw portion with the proximal worm wheel portion,
A box-shaped case in which the support is held in a belt-like substrate portion that spans the upper and lower collar portions of the frame body, and a substantially central portion of the back surface of the substrate portion facing the greenhouse. And
The drive shaft has a pulley at the base end input part protruding out of the support ,
A rotation inhibiting means for inhibiting the rotation of the drive shaft is interposed between the case portion and the pulley,
The drive shaft is rotated by an external force input to the base end input portion via the pulley to rotate the base end worm wheel portion, and the drive arm member is rotated by the rotation of the base end worm wheel portion. The tip arm portion is swung to move the shield, and the shield opens and closes the opening.

  Therefore, according to the present invention, the driving mechanism that opens and closes the opening formed by the frame body by moving the frame body or the shielding body pivotally supported in the vicinity thereof is held on the frame body side as a whole. In addition, since there is no operation rod that is elongated in the vertical direction as proposed in the disclosure of Patent Document 1 described above, it is possible to avoid an unnecessarily large size of the entire apparatus.

  At this time, the external force that moves the shield is input to the drive shaft that swings the drive arm member in the drive mechanism, but when this drive shaft is extended in the lateral direction, it has a minimum required shaft length. The drive mechanism is not unnecessarily increased in size.

  And since the rotation of the base end worm wheel part in the drive arm member depending on the drive shaft is only a little, it is not necessary for the operator to oscillate the shield, and the workability is not required. Be improved.

  Further, the rotation of the proximal worm wheel portion in the drive arm member depending on the drive shaft is small, and therefore the number of teeth formed on the proximal worm wheel portion in the drive arm member is small, and the drive arm member Formation becomes easy and the cost of components in the drive arm member can be reduced.

  In addition, in the drive arm member, when the proximal worm wheel portion and the distal arm portion are integrally formed, the number of parts can be reduced, including the formation of a small number of teeth as described above. Thus, it is possible to facilitate the production of parts and further reduce the cost of parts.

  As a result, in the present invention, it is possible to avoid an increase in the size of the entire device, so that the weight of the entire device is not increased, installation is not required, and the cost of components in the drive mechanism can be reduced. Therefore, it is possible to reduce the cost of the entire apparatus, and to improve the workability and to expect the improvement of the versatility.

It is a perspective view which shows the greenhouse in the state in which the ventilation apparatus in one embodiment of this invention was installed. It is a perspective view which partially fractures and shows the installation state seen from the greenhouse of the ventilation apparatus in one embodiment of this invention. It is an expansion perspective view which fractures | ruptures and shows the drive-mechanism part of the ventilation apparatus in one embodiment of this invention for one minute. It is an enlarged side view which shows partially the ventilation apparatus in other embodiment of this invention. It is an expansion perspective view which partially decomposes | disassembles and shows the ventilation apparatus in other embodiment of this invention.

  In the following, the present invention will be described based on the illustrated embodiment. As shown in FIG. 1, the ventilator in one embodiment is a wife surface H <b> 1, a roof surface H <b> 2 or a side surface of a greenhouse H composed of a greenhouse. It is provided on a single surface selected from any one of H3 or on a plurality of surfaces.

  Incidentally, in the case where the greenhouse H is a greenhouse, the ventilator is an arch member (see symbol P in FIG. 2) as a longitudinal member and a girder member (not shown) that forms the greenhouse. In addition, when the greenhouse H is a glass house, it is also integrated with a column member (not shown) as a longitudinal member and a girder member (not shown) as a transverse member. They are connected and arranged in a stable state.

  And this ventilation apparatus forms the opening part (not shown) in the end face H1, roof surface H2, or side surface H3 of the greenhouse H, and opens and closes the opening (not shown) of this opening part in the greenhouse H Allows ventilation.

  Therefore, in the end face H1, the roof face H2 or the side face H3 where the ventilation device is provided, the arrangement of the extended body such as a vinyl sheet or a glass plate is omitted in the portion where the opening is formed. Needless to say, the omission of the arrangement of the exhibition body is disadvantageous from the viewpoint of so-called insect prevention, and although not shown in the drawings, in many cases, insect prevention from the inside of the greenhouse H or from the outside of the greenhouse to the above opening It is assumed that the net N (see FIG. 1) is detachably or fixedly installed, and in that case, consideration is given to avoiding interference with the insect repellant net N that is provided in the drive mechanism 3 described later. .

  As shown in FIG. 1, the ventilation device may be arranged in a so-called continuous state. Alternatively, although not shown, the ventilation device is arranged in a so-called independent state and adjacent to each other. An interval may be provided between the ventilation device.

  In the illustrated embodiment, that is, as shown in FIGS. 2 and 3, it is assumed that the ventilator of the present invention is provided on the wife surface H <b> 1 in the greenhouse H.

  Describing in detail below, the ventilator according to the present embodiment of the present invention comprises a window frame 1 as a frame, a window 2 as a shield, and a drive mechanism 3 as shown in FIG. When the drive mechanism 3 operates, the window body 2 moves so as to be separated from and seated on the window frame 1 to open and close the opening formed by the window frame 1.

  That is, first, the window frame 1 as a frame body is made of a frame material having a predetermined mechanical strength. In the figure, in the front view, a horizontally long rectangular opening having a longer horizontal length than a vertical length is formed. However, instead of this, although not shown in the drawing, a vertically long rectangular opening whose longitudinal length is longer than the lateral length may be formed in front view.

  Further, in view of the function of this ventilation device, the so-called front shape of the opening formed by the window frame 1 is not limited to the above-described rectangle, and of course, the so-called front shape of the wife surface H1 provided with this ventilation device. Any shape other than a rectangle may be selected, for example, due to the above.

  Incidentally, the window frame 1 will basically be formed so as to define an opening of a predetermined size by itself. However, from the point of view of the present invention, the window frame 1 has been described above. It goes without saying that the window frame 1 may be formed by using or using a pillar member or a girder member that forms the greenhouse H, and an opening opened and closed by the window body 2 may be defined.

  Next, the window body 2 serving as a shield is called a so-called opening / closing window or the like, and opens and closes the opening formed by the window frame 1 by the movement of the driving mechanism 3 described later.

  That is, as shown in the drawing, the window body 2 is formed to have a horizontally long rectangular front shape corresponding to the opening formed in the horizontally long rectangle described above, and the upper side portion 2a as one side portion of the window frame 1 is formed. The lower side 2b, which is the other side of the upper frame 1a or pivotally supported by the left and right vertical flanges 1c that connect the upper frame 1a, is swingable. The opening is closed when adjacent to the lower collar 1b.

  By the way, in this window body 2, it is only necessary to open and close the opening, so that the upper side 2 a is not the upper collar part 1 a or the vertical collar part 1 c of the window frame 1 but the vicinity of the upper part of the upper collar part 1 a. Of course, it may be pivotally attached to the club.

  Further, since the window body 2 is mainly intended to open and close the opening, portions other than the so-called frame portion may be formed of an invisible plate material or sheet that disables lighting, but this ventilation device is also used. As long as it contributes to daylighting, it is preferable that the portion other than the so-called frame portion is formed of a glass plate or a synthetic resin plate with high visibility, and further a resinous sheet material or a film material.

  On the other hand, the window 2 is opened and closed by the lower side 2b being swung by a driving mechanism 3 described later. However, consideration is given so that the opening and closing can be smoothly performed by the operation of the driving mechanism 3.

  That is, this window body 2 has an auxiliary frame 21 that is disposed in the longitudinal direction on the inner surface facing the greenhouse H and connected so as to be bridged between the upper side portion 2a and the lower side portion 2b. The end of the link member 22 is pivotally attached to the auxiliary frame 21.

  And as for this link member 22, the base end part is extended inside greenhouse H, and it is connected to drive mechanism 3 mentioned below, but drive mechanism 3 may be provided in what is called a central part at this time, In the drawing, in order to balance the opening and closing of the window body 2 on the left and right, the link member 22 is paired on the left and right, and thus the auxiliary frame 21 to which the link member 22 is connected is also paired on the left and right. Has been.

  Therefore, in this window body 2, the operating force from the drive mechanism 3 acts smoothly via the link member 22 and the auxiliary frame 21, so that the lower side 2 b is swung to open and close the opening. .

  The auxiliary frame 21 and the link member 22 are provided to smoothly transmit the operating force from the drive mechanism 3 to the window body 2, but in principle, that is, the operating force from the drive mechanism 3 is not generated. Of course, the auxiliary frame 21 and the link member 22 may be omitted as long as they are transmitted to the window body 2.

  Incidentally, when the arrangement of the auxiliary frame 21 and the link member 22 is omitted, the so-called thickness of the window body 2 can be reduced, which is advantageous in suppressing bulkiness of the entire apparatus.

  By the way, the ventilation device of the present invention has a drive mechanism 3 in addition to the window frame 1 and the window body 2 described above. The drive mechanism 3 includes a support body 4 and a drive mechanism as shown in FIG. An arm member 5 and a drive shaft 6 are provided. The drive shaft 6 is rotated by the input of external force to rotate the drive arm member 5, and the drive arm member 5 moves the window body 2 so that the window frame 1 is moved. Open and close the opening to be formed.

  To explain a little, the support body 4 not only constitutes the drive mechanism 3 but also functions as a case body that holds the drive arm member 5 and the drive shaft 6. It is formed so as to have a mechanical strength.

  And in this support body 4, in the illustration, it connects in the state where the board | substrate part 41 formed in strip | belt shape of appropriate thickness was spanned between the upper collar part 1a and the lower collar part 1b in the window frame 1. A case portion 42 formed in a box shape having a predetermined mechanical strength is disposed so as to be held at a substantially central portion of the back surface of the substrate portion 41 facing the inside of the greenhouse H.

  By the way, the above-mentioned substrate part 41 is connected in a state of being bridged from the inside of the window frame 1 to the upper collar part 1a and the lower collar part 1b of the window frame 1, but at this time, Although not shown in detail, the insect net N is preliminarily spread from the inside of the greenhouse H so as to cover the entire window frame 1.

  From this, the above-described substrate portion 41 is disposed so as to be superimposed on the insect-proof net N from the so-called back side, and as a result, the tip of the drive arm member 5 which is formed on this substrate portion 41 and will be described later. Installation of the insect net N is avoided in the slit 41a through which the arm portion 5b is inserted.

  At this time, the end portion of the insect net N that avoids the slit 41 a is avoided from being connected to the substrate portion 41.

  On the other hand, in the case portion 42, the proximal end worm wheel portion 5a of the drive arm member 5 is housed together with the distal end screw portion 6a of the drive shaft 6, and the drive arm member 5 has a proximal end. Since the tip arm portion 5b protrudes from the inside of the case portion 42 to the outside, that is, the window body 2 side, it is integrally connected to the worm wheel portion 5a, so that the substrate portion 41 allows the tip arm portion 5b to protrude. A vertical slit 41a is formed (see FIG. 3).

  In addition, the drive arm member 5 is formed so that the proximal worm wheel portion 5a can be accommodated in the case portion 42 of the support 4, and in the illustrated case, the drive arm member 5 has a substantially disc shape with an appropriate thickness. A plurality of teeth 5c are formed on the outer peripheral portion, and the center portion is pivotally attached to the case portion 42 while being placed vertically so that vertical rotation is allowed.

  And this drive arm member 5 has the front-end | tip arm part 5b which is integrally extended from the base end worm wheel part 5a, and protrudes out of the case part 42, This front-end | tip arm part 5b is a board | substrate part. 41 is connected to the base end portion of the link member 22 on the side of the window body 2 through the vertical slit 41a formed in 41.

  Incidentally, in the drive arm member 5, it is sufficient that the distal end arm portion 5b integrally extending from the proximal end worm wheel portion 5a oscillates in synchronization with the rotation of the proximal end worm wheel portion 5a. Thus, the extending direction from the proximal worm wheel portion 5a may be arbitrary. However, in the drawing, it extends substantially tangentially from the outer peripheral side portion of the proximal worm wheel portion 5a.

  Therefore, in this drive arm member 5, the distal end arm portion 5 b swings in the vertical direction in synchronization with the rotation of the proximal end worm wheel portion 5 a, so that the drive arm member 5 is interposed via the link member 22 and the auxiliary frame 21. However, the lower side 2b of the window body 2 may be close to the lower collar 1b of the window frame 1 so that the opening formed by the window frame 1 by the window body 2 can be opened and closed.

  From this point of view, the drive arm member 5 has a structure in which the distal end arm portion 5b is integrally formed with the proximal end worm wheel portion 5a. Therefore, the drive arm member 5 is formed by punching, for example. Therefore, the cost of parts can be reduced.

  The drive arm member 5 may be formed by, for example, cut-out molding using a laser, casting including die casting, or forging, other than the above-described punching molding.

  Further, in this drive arm member 5, the number of teeth 5c formed on the outer peripheral portion of the proximal end worm wheel portion 5a may be the minimum number of teeth, as shown in a virtual diagram in the figure. In the case where the formation of the teeth 5c is omitted to minimize the number of teeth, the drive arm member 5 can be reduced in weight, and the drive arm member 5 can be easily manufactured to reduce the cost of parts. It is advantageous to make it possible.

  When the drive arm member 5 has the minimum number of teeth 5c formed on the proximal worm wheel portion 5a, a predetermined mechanical strength in the proximal worm wheel portion 5a is ensured. As far as possible, although not shown in the figure, by providing a missing portion in the proximal worm wheel portion 5a, it is possible to further reduce the weight of the drive arm member 5, and to make the drive arm member 5 easier to manufacture, Further, it is possible to further reduce the component cost in the drive arm member 5.

  On the other hand, in the drive mechanism 3, the drive shaft 6 accommodates the tip screw portion 6 a in the case portion 42 that forms the support 4, and the tip screw portion 6 a is also the same as the case portion. 42 is engaged with the base end worm wheel portion 5a of the drive arm member 5 described above.

  At this time, the drive shaft 6 is in a direction orthogonal to the so-called window surface of the window body 2 while the axial direction is set to the lateral direction. By setting in this way, the so-called ventilation area in the opening is mischievous. No need to kill.

  The drive shaft 6 has the distal end screw portion 6a accommodated in the case portion 42, while the base end input portion 6b protrudes outside the case portion 42, that is, into the greenhouse H. At this time, a boundary portion between the distal end screw portion 6a and the proximal end input portion 6b is rotatably fitted to the case portion 42, and in particular, fixed so that the drive shaft 6 cannot move in the axial direction. Yes.

  The drive shaft 6 has a pulley 61 having two grooves 61a and 61b in a fixed state in the proximal end input portion 6b. The grooves 61a and 61b of the pulley 61 have a traction rope 62, 63 are respectively multiplied.

  For example, as shown in the figure, the end of one traction rope 62 is connected to one groove 61a by using the pin 62a, and therefore the other traction rope 62, 63 is shown. By making the rope 63 the same, the proximal end input part 6b is reliably rotated by the movement of the tow rope 62 by human power, for example.

  As described above, when the traction ropes 62, 63 wound around the pulley 61 are connected to the grooves 61a, 61b in a fixed state by using the pins 62a, the traction rope 62 is not shown. Instead, as in the case where the chain is wound, it is advantageous in that the rotation of the drive shaft 6 can be realized with certainty.

  Instead of the illustrated one, when each of the traction ropes 62 and 63 is hung in the endless state on the two grooves 61a and 61b of the pulley 61, the two traction ropes 62 and 63 are so-called reciprocating. By setting for either one of the rotation, the durability of each traction rope 62 can be improved, and even if one of the traction ropes 62 breaks, the other traction rope 62 can be used. The opening / closing operation of the window body 2 can be ensured.

  Here, when the operability of the drive mechanism 3 of the present invention is compared with the operability of the drive mechanism disclosed in Patent Document 1, it is understood that the operability of the drive mechanism 3 of the present invention is far superior. .

  That is, in the drive mechanism disclosed in Patent Document 1, as disclosed in FIG. 6 of the publication, the screw rod (14), which is an operating rod having a spiral rib, is turned to rotate the screw rod (14). The slider (15) wound around the slider (15) is moved up and down, and the opening is opened and closed by swinging the lower end side of the window through the link (10) pivotally attached to the slider (15).

  Therefore, in the drive mechanism disclosed in Patent Document 1, if the slider (15) is not moved up and down with a large stroke by rotating the screw rod (14) many times, the slider (15) The angle of the link (10) to be connected does not change greatly, and therefore it is not easy to quickly open and close the opening by swinging the window body.

  On the other hand, in the drive mechanism 3 of the present invention, when the drive shaft 6 is rotated once and the proximal worm wheel portion 5a of the drive arm member 5 is rotated by one pitch, the distal arm is rotated by that amount. The portion 5b is swung, and the window body 2 is swung immediately through the link member 22, so that opening and closing of the opening is quickly realized.

  As a result, the present invention is advantageous in that the window body 2 that opens and closes the opening can be easily and quickly realized as compared with the technique disclosed in Patent Document 1 described above.

  From the above, it is advantageous that the drive shaft 6 is rotated by human power in terms of product cost and use economy, but the ventilator of the present invention is, for example, a greenhouse H. When it is provided on the roof surface H1, it is not easy to rotate the drive shaft 6 by moving the tow rope 62 manually, and in view of this, although not shown, A drive source of the electric motor may be connected. In this case, it may be advantageous in that a so-called remote operation can be enabled.

  Incidentally, in the proposal disclosed in Patent Document 1 described above, the structure of the drive mechanism (4) is complicated, so there are many metal parts, and therefore, the use of mechanical force such as a drive motor tends to cause metal wear. Although the drive mechanism 3 according to the present invention has a simple structure having the drive arm member 5 and the drive shaft 6, even if mechanical force such as a drive motor is used, metal wear occurs. It becomes difficult to be done.

  In the ventilator according to the present embodiment formed as described above, the configurations of the window frame 1 and the window body 2 are generally used in this type of ventilator, for example, Patent Literature 1 may be diverted, and in that sense, the present invention can be embodied only by replacing the drive mechanism (4) in the ventilator disclosed in Patent Document 1 with the drive mechanism 3 in the present invention. There are advantages.

  And in this invention, compared with the ventilator disclosed in Patent Document 1, it is not necessary to have an operating rod with a spiral rib arranged in the vertical direction. In addition to being able to reduce the weight, the handling can be facilitated, and the versatility can be expected to improve due to the reduction in the product cost.

  In the above description, the drive shaft 6 is in a direction orthogonal to the so-called window surface of the window body 2 with the axial direction being the lateral direction, regardless of the drive arm member 5. The axial direction of the shaft 6 may be a direction along the window surface while being a lateral direction.

  Moreover, in the place mentioned above, although the window body 2 said that the edge was cut | disconnected with the exhibition bodies, such as a vinyl sheet which forms the side surface H2 and the wife surface H3 of the greenhouse H, it replaces with this, although not shown in figure, It may be covered from the outside of the greenhouse H with an exhibition body such as a vinyl sheet that forms the side surface H2 and the wife surface H3.

  Next, another embodiment of the present invention will be described. As shown in FIG. 4, the present embodiment is different from the first embodiment only in that the rotation inhibiting means 7 is interposed between the pulley 61 and the case portion 42. Since it is the same as that of one embodiment, the same reference numerals are given and detailed description thereof is omitted.

  As shown in FIG. 5, the rotation-inhibiting means 7 is attached to the outer periphery of the proximal end input portion 6b of the drive shaft 6 and is attached while being compressed to the case portion 42 side. A washer 71 is provided between the pulley 61 and the coil spring 70 biases the case portion 42 and the pulley 61 away from each other to inhibit rotation of the drive shaft 6.

  The coil spring 70 is a conical spring having a substantially conical shape with a diameter increasing from the case portion 42 side to the pulley 61 side. The coil spring body 70a and the case spring 42 side end of the coil spring body 70a The hook portion 70b is formed, and the hook portion 70b is hooked on the nut 8 that fixes the case portion 42 to the base plate portion 41 to be prevented from rotating.

  Therefore, in the present embodiment, the window 2 is beaten under the influence of wind or the like, and the external force is repeatedly applied from the proximal end worm wheel portion 5a to the distal end screw portion 6a, whereby the drive shaft 6 starts to rotate. It is possible to prevent the rotation by the rotation inhibiting means 7, and it is possible to prevent the opening of the drive shaft 6 from starting and closing due to the weight of the window body 2.

  That is, it is possible to prevent the opening from being closed by the input of force from the window body 2 without increasing the reduction ratio between the proximal worm wheel portion 5a and the distal end screw portion 6a.

  Further, by interposing the rotation inhibiting means 7 between the case portion 42 and the pulley 61, the rotation of the drive shaft 6 can be easily inhibited.

  Further, by providing the washer 71, the pulley 61 is not damaged by the coil spring 70 when the pulley 61 is rotated.

  Further, by making the coil spring 70 a conical spring, when the coil spring 70 is compressed as shown in FIG. 4, the axial length of the coil spring 70 can be shortened, and the rotation inhibiting means can be reduced in a small space. 7 can be accommodated.

  The configuration of the rotation inhibiting means 7 is not limited to the above, and can be appropriately selected as long as the drive shaft 6 can be prevented from starting to rotate by the input of an external force from the window body 2 side. It is.

  For example, although not shown, the rotation inhibiting means 7 may be interposed between the tip screw portion 6 a and the case portion 42, and friction is generated between the case portion 42 and the pulley 61 instead of the coil spring 70. A rotation inhibiting means may be configured by interposing a friction body.

  Of course, the coil spring 70 may be formed in a cylindrical shape, and the washer 71 is not necessarily provided.

  In a greenhouse consisting of a plastic house, etc., provided on the wife's surface, roof surface or side surface to allow ventilation in the greenhouse and to optimize the temperature in the greenhouse, for example, for the plants to be grown Suitable for.

DESCRIPTION OF SYMBOLS 1 Window frame which is a frame 1a Upper collar part 1b Lower collar part 1c Vertical collar part 2 Window body which is a shield 2a Upper side part which is one side part 2b Lower side part which is another side part 3 Drive mechanism 4 Support body 5 Drive arm member 5a Base end Worm wheel portion 5b Tip arm portion 6 Drive shaft 7 Rotation inhibiting means 6a Tip screw portion 6b Base end input portion 21 Auxiliary frame 22 Link member 41 Substrate portion 41a Vertical slit 42 Case portion 61 Pulley 62 Pulling rope 70 Coil spring 71 Washer H Greenhouse H1 Wife surface H2 Side surface H3 Roof surface N Insect-proof net P Longitudinal member arch member

Claims (8)

A frame that forms an opening on the wife's face, roof surface, or side surface of the greenhouse, a shield that pivots on the frame and opens and closes the opening when swinging, and swings the shield against the frame A ventilation device having a drive mechanism
A support arm in which the drive mechanism is held by the frame, and a drive arm in which a distal end arm portion projecting outside the support body is coupled to the shield body while a base end worm wheel portion is pivotally supported by the support body A member, and a drive shaft held by the support while meshing a distal end screw portion with the proximal worm wheel portion,
A box-shaped case in which the support is held in a belt-like substrate portion that spans the upper and lower collar portions of the frame body, and a substantially central portion of the back surface of the substrate portion facing the greenhouse. And
The drive shaft has a pulley at the base end input part protruding out of the support ,
A rotation inhibiting means for inhibiting the rotation of the drive shaft is interposed between the case portion and the pulley,
The drive shaft is rotated by an external force input to the base end input portion via the pulley to rotate the base end worm wheel portion, and the drive arm member is rotated by the rotation of the base end worm wheel portion. A ventilator characterized in that the tip arm is swung to move the shield, and the shield opens and closes the opening. The base end worm wheel portion is pivotally supported while the base end worm wheel portion is housed in the case portion, and the tip screw portion of the drive shaft that meshes with the base end worm wheel portion is rotatable. To be
Allowing the insertion of the tip arm portion, which is connected to the base end worm wheel portion and protrudes from the case portion toward the shield body side,
Furthermore, the said case part is a ventilation apparatus of Claim 1 which accept | permits the protrusion to the greenhouse inner side of the said base end input part.   A proximal worm wheel portion having a plurality of teeth, the drive arm member being made of a plate material of an appropriate thickness, formed in a substantially disc shape and meshing with the distal end screw portion on the outer periphery, and the proximal worm wheel The ventilator according to claim 1 or 2, further comprising a tip arm portion integrally connected to the portion. An auxiliary frame in which the shield is vertically disposed on an inner surface facing the inside of the greenhouse, and a link member having a distal end connected to the auxiliary frame and a base end directed toward the inside of the greenhouse,
The ventilation device according to claim 1, 2, or 3, wherein a distal end portion of the distal arm portion of the drive arm member is pivotally attached to a proximal end portion of the link member.   The said rotation inhibition means is provided with the coil spring attached while being compressed, The said spring is urged | biased in the direction which spaces apart the said case part and the said pulley. Or the ventilation apparatus of Claim 4.   6. The coil spring according to claim 5, wherein the coil spring has a hook portion formed at a case side end portion, and the hook portion is hooked on a nut that fixes the case portion to the base plate portion to prevent the coil spring from rotating. The ventilation device described.   The ventilation device according to claim 5 or 6, wherein the rotation inhibiting means includes a washer interposed between the coil spring and the pulley. The ventilation device according to claim 5 or 7, wherein the coil spring is a conical spring.

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