JPS6145800Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an opening/closing device for a greenhouse curtain that is stretched for the purpose of keeping the greenhouse warm and blocking light.

The applicant has previously proposed a system for winding and unwinding a curtain without changing the position of the winding shaft of the curtain, as disclosed in Japanese Utility Model Application No. 55-96768 (Japanese Utility Model Application Laid-Open No. 57-11314).
In the mounting structure of these winding shafts, both ends of the curtain winding shaft are supported by bearing members, and the middle part is provided with a support member to support the lower outside of the part of the curtain wound into a roll.

However, with this structure, there is a risk that the intermediate section may fall off from the support member due to deflection of the winding shaft, especially when closing the curtain, and the winding amount of the curtain is large and the diameter of the winding shaft is large. In some cases, excessive frictional resistance occurs between the support member provided in the middle and the curtain, and when the curtain is closed, a considerable amount of tension is applied to the curtain, causing damage to the curtain material and the running rope for opening and closing the curtain. Furthermore, due to the frictional resistance, a large amount of driving force is required for the winding shaft even when opening the curtain.

The present invention has been proposed to solve the above-mentioned conventional drawbacks, and the present invention will be explained below based on embodiments shown in the drawings.

Fig. 1 shows an embodiment of the curtain opening/closing device of the present invention, in which 1... is a frame constituting a greenhouse, 2 is endlessly hung around guide pulleys 3, 4, and 3', and a winding drum is connected to a winding drum. A running rope whose running direction changes according to the forward and reverse rotation of 5; 6 is the winding drum 5;
The driving shaft 7 is a curtain winding shaft, and this winding shaft is configured to be rotated using a mainspring spring as a driving source. Further, the winding shaft 7 is supported by bearing members 8 at appropriate intervals.

The curtain 9 is provided so as to be able to be wound around the winding shaft 7 between each bearing member 8, and its movable edge is fixed to a key point of the running rope 2.

Reference numeral 10 denotes an auxiliary curtain that can be expanded and contracted to cover the gap between the curtains 9, 9. One end is fixed to the side wall of the greenhouse or its vicinity, and the other end is attached to the curtain 9.
The auxiliary rope 11 is fixed to a key point of the auxiliary rope 11 so as to be aligned with the moving edge of the auxiliary rope 11. The auxiliary rope 11 is wound around guide pulleys 12, 13, and 12' in an endless manner, and its running direction changes according to the forward and reverse rotation of the winding drum 14. Also, the winding drum 14
is fixed to the drive shaft 6 and is configured to rotate in synchronization with the winding drum 5 and to cause the auxiliary rope 11 to run in synchronization with the running rope 2.

In addition, in FIG. 1, M is a winding shaft drive device,
Reference numerals 15, . . . indicate support wires for preventing drooping of the curtain 9, and although they are stretched in an X-shape in the figure, it goes without saying that they may be stretched in parallel to each other.

FIG. 2 shows an embodiment in which a curtain restraining body 16' is provided on the fixture 16 for fixing the moving edge of the auxiliary curtain 10 to the auxiliary rope 11. By providing the restraining body in this way, the auxiliary curtain 10 There will be no leftover parts when the parts are gathered together.
The curtains can be opened completely.

Figures 3a to 3c show a connection structure in which a plurality of winding shafts 7 are connected instead of a long one, and Figure 3a shows the winding shaft main body 7.
Connecting parts 71a, 71a are formed so that the ends of the sleeves 1, 71 can be fitted into the sleeve 80, and are fastened with bolts 81.

In FIG. 3b, stepped portions 72a, 72a are provided at the ends of the winding shaft bodies 72, 72, and after they are engaged, a bolt 83 is inserted and tightened to fix them. Fig. 3c shows a configuration in which recesses 73a, 73a and protrusions 73b, 73b that fit into each other are formed at the ends of the winding shaft bodies 73, 73, and a shaft core member is inserted therein, and the winding shaft main body 73, 73 is formed with recesses 73a, 73a and protrusions 73b, 73b that fit into each other. Fasten with bolts etc. as shown.

Alternatively, as shown in FIG. 4, the bearing members 8a may be provided with rotatable short shafts 8a' in advance, and the winding shaft main body 7a' may be connected to these.

In this way, if the winding shaft main body 73' and the curtain 9 wound around it are made into one unit, it is convenient for portability, management, replacement of the curtain, etc.

In the above embodiment, the driving source for the curtain winding shaft 7 is a spring spring, but if this is a constant spring spring, the winding/unwinding torque of the curtain is constant from the beginning to the end of winding/unwinding. This has the advantage that excessive tension is not applied to the curtain.

Further, another drive source may be one that is connected to the drive shaft 6 via an inconstant spiral spring or the like so that the rotational speed can be automatically changed.

In addition, by using a hard horizontal rod such as a pipe material at the moving edge of the curtain, the tension applied to the entire curtain can be made uniform, thereby preventing local twitching and damage of the curtain. can.

The present invention has the above-mentioned structure, and the curtain winding shaft is supported by a bearing member over a short distance, so there is little deflection of the winding shaft, and therefore a separate support member is not required in the middle part. I don't. In other words, the drawbacks caused by the conventional support member provided at the intermediate portion can be prevented.

In addition, the width of the curtains is small, making installation work extremely easy, and since the gaps between the curtains where the bearing members are located are covered with auxiliary curtains, they have excellent heat retention and light blocking properties for the greenhouse. ing.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing one embodiment of the greenhouse curtain opening/closing device according to the present invention, Fig. 2 is a perspective view showing another embodiment, and Figs. 3a to 3c show various connection modes of the curtain winding shaft. Fig. 3a is a longitudinal sectional view of one example, Fig. 3b is a longitudinal sectional view of another example, Fig. 3c is a perspective view of yet another example, and Fig. 4 is another installation of the curtain winding shaft. A plan view showing an example. 1... Greenhouse frame, 2... Running rope, 5,
14... Winding drum, 6... Drive shaft, 7... Curtain winding shaft, 8... Bearing member, 9... Curtain,
10... Auxiliary curtain.

Claims (1)

[Claims for Utility Model Registration] 1. In a greenhouse having a partition curtain, a main curtain winding shaft disposed along the side wall of the greenhouse, a drive device for the winding shaft, and a main curtain winding shaft disposed along the side wall of the greenhouse; a plurality of partition main curtains that can be wound around a winding shaft between each bearing, and a running rope for pulling the moving edge of each main curtain. A greenhouse curtain opening/closing device comprising an expandable auxiliary curtain that can be opened and closed at the same time as the main curtain while covering the gap between the main curtains. 2. The greenhouse curtain opening/closing device according to claim 1, wherein the drive source of the winding shaft drive device is a constant torque spring spring.