JP3455771B2 - Ventilation equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation device formed on a side surface, a gable surface or the like of a greenhouse such as a greenhouse.

[0002]

2. Description of the Related Art In greenhouses such as greenhouses, which are set to an appropriate temperature for plants to be grown, openable windows are formed on the side and gable of the greenhouses. Ventilators have been developed to ventilate.

For example, as this ventilation device,
The one disclosed in Japanese Patent No. 45565 has been developed and has been well received by users.

This ventilation device is provided with a window frame provided on the side surface or the end surface of the vinyl house, a ventilation window provided at the end of the window frame so as to be openable and closable via a hinge, and a push provided at the lower back of the ventilation window. It consists of a rod and a drive device installed at the end of the push rod.The drive device consists of a rectangular hollow casing, sprocket wheels and guide wheels for driving provided above and below the casing, sprocket wheels and guides. It is composed of an endless chain rotatably mounted on the vehicle, a bracket for connecting the end portion of the push rod to the endless chain, and a rotating shaft provided at the center of the sprocket wheel.

In the above ventilation device, when the sprocket wheel is rotated from the outside through the rotary shaft, for example, in the counterclockwise direction, the endless chain rotates in the same direction and pushes up the push rod through the bracket. Is pushed outwards and this ventilation window opens around the hinge.
On the other hand, when the sprocket wheel is rotated clockwise, the bracket and the push rod are pulled by the endless chain that rotates in the same direction, and the ventilation window is closed.

[0006]

The ventilation device as described above is not functionally problematic, but has the following problems.

First, when the ventilation window is closed, it may not be completely closed until it becomes a completely sealed body. That is, the spring force of the hinge part, the spring force and rigidity of the frame body of the ventilation window, the play and mounting angle of the connection part between the ventilation window and the push rod, or the play of the connection part between the push rod and the drive device. There is a gap between the ventilation window and the window frame due to the influence of the installation angle, the mounting angle, the extension of the endless chain, and the backlash, but there is a gap between the ventilation window and the window frame. May invade.

Therefore, in order to completely close the ventilation window, it is necessary to precisely machine each member and assemble each member precisely, but in this case, the machining and assembly are difficult,
A considerable burden is placed on workability and cost.

On the other hand, the rotary shaft may be forcedly rotated in the closing direction to close the ventilation window, but in this case, a considerable load is applied to the drive source for driving the rotary shaft, such as an electric motor or a hydraulic motor. This may damage the drive source.

Secondly, when the ventilation device is installed on the side surface or the gable surface of the greenhouse, the ventilation window is in a hanging state, and as a result, when there is wind pressure, the ventilation window may flap and shake greatly. . Therefore, in order to prevent the flapping, a brake mechanism may be provided so that the rotating shaft does not reverse, but in this case, the structure becomes complicated and the cost increases. In order to prevent the ventilation window from flapping, the ventilation window itself may be always biased in the closing direction by attaching a spring, wire, weight or the like, but even in this case, the structure becomes complicated and the opening operation becomes difficult. At times, it is necessary to remove these springs and the like, which makes the operation troublesome.

Therefore, an object of the present invention is to process each member,
A ventilation system for greenhouses, etc., which does not impose a heavy load on the assembly, does not adversely affect the drive source, can completely close the ventilation window, and can prevent flapping, and has excellent workability and economy. Is to provide.

[0012]

In order to achieve the above object, the means of the present invention includes a window frame, a ventilation window that is openably and closably provided at an end portion of the window frame, and a back portion of the ventilation window. A push rod and a push rod driving device provided at an end portion of the push rod. The push rod driving device includes a casing, a driving vehicle and a driven vehicle provided in the casing, and the driving vehicle and the driven vehicle. In a ventilator comprising an endless strip rotatably mounted on a strip and a bracket connecting the end of the push rod to the strip, the end of the bracket is opposite the push rod. A hook member extending in the direction is integrally formed, and an engaging portion for removably engaging the hook member is provided on the inner circumference or the outer end of the casing.

In this case, the endless strip is composed of an endless chain, the bracket is composed of one or two plates or a plate bent in a U-shaped cross section, and the plate is connected to the endless chain. At the same time, it is preferable to rotatably support the end portion of the push rod.

Similarly, it is preferable that the locking portion is a hooking piece or a stepped portion formed on the inner circumference of the casing so as to face the hooking member.

Similarly, the locking portion is preferably the end surface of the opening of the casing.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 4, for example, the ventilation device A of the present invention is provided on the end face C of a greenhouse greenhouse B, which is a window frame 1 provided on the end face C and the window frame 1. And a ventilation window 2 that is openably and closably coupled to the upper end portion.

As shown in FIGS. 1 and 2, the ventilation device A is
A window frame 1, a ventilation window 2 which is connected to an upper end of the window frame 1 via a hinge 3 so as to be openable and closable in the vertical direction, a push rod 4 which is a transmission rod pivotally supported on the back of the ventilation window 2, and a push rod. The drive device D is provided at the other end of the drive unit 4.

The window frame 1 is provided with a transparent or semi-transparent vinyl sheet 5 and has two dovetail groove frames 6 vertically arranged in the horizontal direction.
6 and other dovetail groove frames 6a, 6a which are vertically installed on the dovetail groove frames 6, 6. Further, a frame 7 for mounting the drive unit D is vertically installed between the upper and lower dovetail groove frames 6 and 6.

The ventilation window 2 is formed in a rectangular or rectangular shape by a frame body composed of a pair of horizontal dovetail groove frames 8 and 8 and a frame body constructed between the dovetail groove frames 9 and 9. A vinyl sheet 11 is stretched on each dovetail groove frame 8, 8 and 9, 9 via an elastic spring 10.

The ventilation window 2 is opened and closed in the vertical direction via the hinge 3 when the push rod 4 is moved as shown by the arrow X.

The upper end of the push rod 4 is rotatably pivoted to the middle of the dovetail groove 9 via a pin 12, and its mounting position is changed depending on the opening angle of the ventilation window 2. Can be changed up or down.

A drive device D in the vertical direction of the push rod 4 is shown in FIGS.

The drive device D is a hollow rectangular casing 13, a sprocket wheel 14 as a drive vehicle rotatably provided at a lower portion of the casing 13, and a casing 1.
3, a driven wheel 16 rotatably supported on the upper part of the shaft 3 via a shaft 15, these sprocket wheels 14 and the driven wheel 1
An endless chain 17 which is an endless strip rotatably installed between 6 and a bracket 2 which is connected to arbitrary positions of the endless chain 17 by upper and lower pins 18 and 19.
It is composed of 0 and. The bracket 20 is connected to the lower end portion of the push rod 4 via a pin 21 at approximately the middle thereof, and moves the push rod 4 in the vertical direction as the endless chain 17 rotates clockwise or counterclockwise.

The sprocket wheel 14 rotates integrally with a rotary shaft 22 penetrating the center 14a, and the rotary shaft 22 is manually rotated or driven to rotate clockwise or counterclockwise by an external electric motor or the like. . The sprocket wheel 14 is supported by two free rollers provided in the casing 13.

A hook or hook 23 as a hooking member is integrally connected to the lower end portion of the bracket 20.
Extends downward on the side opposite to the push rod 4.

Although the bracket 20 and the hook 23 are formed of a single plate, they may be formed of two plates so that the endless chain 17 and the push rod 4 can be held, or a U-shape. It may be configured by a plate body that is bent.

A baffle plate 24 is provided at the center of the upper end of the bracket 20.
Are installed horizontally. This baffle 2
4, the bracket 20 itself may be partially notched and bent at the upper end thereof, or may be connected by welding or the like. Although the baffle plate 24 can be used without the baffle plate 24, as will be described later, when the bracket 20 descends to the vicinity of the sprocket wheel 14 and swings, the pin 17a forming the endless chain 17 is provided between the two brackets 20, 20. Prevent biting.

The hook 23 extends downward and its tip is bent toward the inner peripheral surface of the casing 13, that is, the left inner peripheral surface in FIG.

On the other hand, on the inner peripheral surface of the casing 13 or the lower end portion of the casing 13, there is formed a locking portion 24 to which the hook is detachably engaged. In the embodiment shown in the drawings, the end surface of the opening of the casing 13 is used as the locking portion 24. In this case, the hollow casing 13
The lower end is opened, and the peripheral portion of the left end surface of the opening at this time is used as the locking portion 24. However, the locking portion 24 may be one or a plurality of steps or holes formed on the left inner peripheral surface of the casing 13.

Next, the operation will be described.

1, 2 and 3, when the rotary shaft 22 is rotated clockwise, the sprocket wheel 1 is rotated.
4 and the endless chain 17 rotate in the same direction, and the push rod 4 connected to the endless chain 17 through the bracket 20 slides in the casing 13 along the longitudinal direction and rises. Therefore, as shown in FIG. 1, the ventilation window 2 is pushed upward by the push rod 4, and the ventilation window 2 is opened while rotating around the hinge 3. In this state, the greenhouse is opened and ventilation is performed.

On the other hand, when the ventilation window 2 is closed from the state shown in FIG. 1, the rotary shaft 22 is rotated counterclockwise. At this time, the sprocket wheel 14 and the endless chain 17 also rotate in the same direction, and the bracket 20 and the push rod 4
Moves along the casing 13 while being pulled downward, and the ventilation window 2 drawn by the push rod 4 rotates via the hinge 3 and hits the window frame 1.

However, if the rotation of the rotary shaft 22 is stopped and left in this state, the rigidity of the dovetail groove frame 9 constituting the ventilation window 9, spring force, play, or spring force of the hinge 3, hinge 3 and the ventilation window. Due to a slight rounding of the mounting angle with 2 and the like, the ventilation window 2 returns to the direction in which it slightly opens as shown in FIG. 2, and it is not completely closed and a slight gap L is formed between it and the window frame 1.
May come out.

Therefore, in such a case, the rotary shaft 22 may be further rotated to engage the hook 23 with the locking portion 24 so that the push rod 4 does not return upward.

That is, as shown in FIGS. 2 and 3, the ventilation window 2
When the rotary shaft 22 is further rotated when the pin 18 hits the window frame 1, the pins 18, 1 for connecting the bracket 20 at this position are just rotated.
9 engages with the sprocket 14, and the bracket 20 itself swings clockwise in FIG.
3 is pushed to the outside of the casing 13, and the hook 23 is forcibly hooked on the locking portion 24 so that the hook 23 and the push rod 4 do not move upward. Push rod 4
The bracket 20 and the hook 23 move up and down in the casing 13 substantially in parallel at a position where the bracket 20 is separated from the sprocket wheel 14, but as described above, the bracket 20 is close to the sprocket wheel 14 and the pin 1
When 8 and 19 mesh with the sprocket wheel 14, the bracket 20 rotates clockwise due to the disk shape of the sprocket wheel 14, and the lower part of the push rod 4 and the hook 23 are pushed in the left inner circumferential direction of the casing 13. When the hook 23 is positioned below the open end of the casing 13, the hook 23 is hooked on the locking portion 24. For this reason, in this state, even if the rotation of the rotary shaft 22 is stopped, the hook 23 is hooked on the locking portion 24. Therefore, even if the ventilation window 2 tries to return to the opening direction due to wind pressure or spring force, it cannot return. It is possible to maintain the ventilation window 2 completely closed.

From the above state, when the ventilation window 2 is opened, the rotary shaft 22 is rotated in the clockwise direction, contrary to the above. In this case, first, the pins 18 and 19 are attached to the sprocket wheel 1.
4, the urging force of the bracket 20 in the clockwise direction is released because the bracket 20 moves upward and is substantially parallel to the casing 13. As a result, the hook 23 is also returned to be substantially parallel to the inner peripheral surface of the casing. Therefore, the engagement with the locking portion 24 is released. Therefore, if the rotation of the rotary shaft 22 is continued in this state, the push rod 4 is pushed up and the ventilation window 2 is opened as shown in FIG.

[0038]

According to the invention of each claim, there are the following effects.

Since the hook member extending in the opposite direction to the push rod is integrally formed at the end of the bracket, when the bracket comes to the position of the sprocket wheel, the bracket swings to engage the hook member with the locking portion. As a result, the ventilation window cannot return to the opening direction even if wind pressure or spring force is applied, and it can be kept in contact with the window frame and closed.

The ventilation window does not open when the hook portion is connected to the locking portion. Therefore, the rigidity of the frame body constituting the ventilation window, the mounting angle, and the assembling of the framework of the greenhouse may be somewhat rough. Since the machining accuracy and the assembling accuracy are not significantly burdened, the workability and the assembling efficiency are improved and the cost can be reduced.

In order to prevent the ventilation window from fluttering due to wind pressure, neither expensive brake means is needed, nor a weight or spring for fixing the ventilation window is required, so that the structure is simple, the cost can be reduced, and when the window is opened. There is no need to remove the above springs.

In the state where the hooking portion is connected to the locking portion, it is not necessary to pull the push rod by the driving device for a long period of time, and therefore, for example, an electric motor or a hydraulic motor as a driving source is not overloaded and the device is not operated. The durability of can be improved.

[Brief description of drawings]

FIG. 1 is a partially enlarged perspective view of a greenhouse ventilation device according to an embodiment of the present invention.

FIG. 2 is an enlarged schematic front view showing an operating state in which the ventilation device of FIG. 1 is closed.

3 is a partially enlarged perspective view of the drive device shown in FIG. 1. FIG.

FIG. 4 is a schematic perspective view of a ventilation device attached to a greenhouse.

[Explanation of symbols]

1 window frame 2 ventilation windows 4 push rod 13 casing 14 driving car 16 Driven vehicle 17 Endless Chain 20 bracket 24 Locking part B ventilation D drive

Claims (4)

(57) [Claims] 1. A window frame, a ventilation window openably and closably provided at an end portion of the window frame, a push rod provided at a back portion of the ventilation window, and a push rod driving device provided at an end portion of the push rod. The drive device for the push rod comprises a casing, a drive wheel and a driven wheel provided in the casing, an endless strip body rotatably installed on the drive vehicle and the driven vehicle, and the strip body. In a ventilator comprising a bracket that joins the ends of the push rod to
A hook member extending in the opposite direction to the push rod is integrally formed at the end portion of the bracket, and a locking portion for detachably engaging the hook member is provided at the inner circumference or the outer end portion of the casing. A characteristic ventilation system. 2. The endless strip is composed of an endless chain, the bracket is composed of one or two plates or a plate bent in a U-shaped cross section, and the plate is coupled to the endless chain. The ventilation device according to claim 1, wherein the end portion of the push rod is rotatably supported. 3. The ventilation device according to claim 1, wherein the engaging portion is a hooking piece or a stepped portion formed on the inner circumference of the casing so as to face the hooking member. 4. The ventilation device according to claim 1, wherein the locking portion is an end surface of the opening of the casing.