JP3784125B2 - Shaft coupling used for winding and lowering agricultural tunnel house coverings - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a shaft coupling that can save labor when opening and closing a vinyl film, a sheet, or the like, which is a covering material for an agricultural tunnel house, for temperature control of cultivated crops.
[0002]
[Prior art]
In so-called tunnel house cultivation where a large agricultural house or a plurality of arched frames are erected in a row on an open field, and a covering material such as a film is stretched between the frames to cultivate crops, For temperature control and daylighting control, the covering material is rolled up according to environmental conditions such as solar radiation and temperature, and a part or all of the covering material is released to the outside. Shielding from the outside is done.
[0003]
Conventionally, the opening / closing operation of the covering material is performed by winding one end side of the covering material stretched to the other end side, or moving both end sides to the central top side, or vice versa. It was done manually.
[0004]
In this case, the end portion of the wound covering material was lifted up to the center top side and stopped with a laundry scissors. However, such conventional winding and unwinding methods have the following problems.
[0005]
[Problems to be solved by the invention]
That is, the length of the covering material is manually increased, for example, in a large agricultural house, the length of the covering material is usually about 50 m to 100 m in two rows, such a long distance. Opening and closing work by bending the waist has a very heavy burden on the waist, and especially in the current situation where agricultural workers are aging, improvement of work and labor saving have been demanded.
[0006]
The present invention has been made in view of such problems, and the object of the present invention is not to require a complicated and large-scale apparatus, and the covering material can be wound and unwound by a relatively simple means. It is to provide a shaft coupling that can be used .
[0007]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention locks one end side of a covering material of an agricultural tunnel house to the outer periphery of a winding core, rotates at least one end side of the winding core, and winds the covering material. The coating material is wound up on the outer periphery of the core, and the coating material wound around the core is rotated at least on one end side of the winding core so that the coating material is wound around the outer periphery of the core. A shaft joint used in a method for winding and lowering a covering material of an agricultural tunnel house to be unwound by unwinding from the pipe, wherein the winding core is made of a fiber-reinforced synthetic resin pipe and a shaft joint fixed to the pipe The shaft coupling includes a flange portion having substantially the same outer diameter as the outer diameter of the pipe, an insertion portion of the pipe formed on one end side of the flange portion, and the flange A plurality of differences formed extending along the axial direction of the other end of the portion And strips provided along the circumferential direction of the insertion pieces, constituted by a fitting portion for receiving the insertion piece of the shaft coupling that is mounted to the other pipe to be connected.
According to this configuration, the shaft unit as a winding core is composed of a fiber reinforced synthetic resin pipe and a shaft joint fixed to the fiber reinforced synthetic resin pipe , so that this type of pipe has light weight, high elasticity, By effectively utilizing characteristics such as torsion resistance, the rotational force applied from the end is transmitted to the entire length of the multiple connected shaft units via the joint, and this is rotated as a unit. By doing so, the tunnel house covering material fixed to the shaft unit can be simultaneously wound or unwound over the entire length.
Further , according to this configuration, since the shaft coupling is fixed to each shaft unit and can be fitted and connected to each other, it can correspond to the length of any tunnel house, and can be transported, Easy to store and easy to connect.
The insertion pieces and the fitting portions are alternately arranged along the circumferential direction of the flange portion, and the opposing positions of the circular cross section are cut out in a fan shape along the axial direction at intervals of approximately 90 degrees. While forming a fitting part, the notch remainder can be made into the said insertion piece.
According to this configuration, in the pair of shaft joints, one of the joints can be fitted and connected in a state where the joint is rotated by approximately 90 degrees, so that only one kind of joint is required.
An insertion groove of an O-ring that is locked so as to straddle between both insertion pieces when the pair of shaft couplings are fitted and connected can be provided on the outer periphery of the insertion piece.
According to this configuration, when the shaft coupling is fitted, the O-ring can be mounted in the insertion groove to reinforce the coupling between the shaft couplings.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings. 1 to 4 show an embodiment of a shaft coupling used for winding and lowering the agricultural tunnel house covering material according to the present invention.
[0009]
FIG. 1 shows an agricultural large house 1 to which the winding and lowering method of the present invention is applied. The large house 1 is composed of a frame assembled with steel pipes, steel materials, etc., and a sheet covered with the frame.
[0010]
In the large house 1, tunnels 4 having the same configuration in which a film 3 is stretched as a covering material on an arch-shaped frame 2 are provided in two rows in parallel. In FIG. 1, the right tunnel 4 has one end of the film 3 locked to the core 5, and the film 6 is attached to the core 5 by rotating the handle 6 attached to the core 5 in the clockwise direction. Winding work is shown in the middle of winding work to prevent the film 3 from being wound on the outer periphery and without the film 3 from the side of the tunnel 4 to the shoulder so as to prevent high temperature in the tunnel 4, ventilation, watering, etc. .
[0011]
The film 3 wound up needs to be kept warm at night, for example. Therefore, the film 6 is rewound by rotating the handle 6 counterclockwise, and the shoulder of the film 3 from the side of the tunnel 4 is obtained. Can be covered.
[0012]
FIG. 2 shows details of the shaft unit 10 that is a component of the core 5. The shaft unit 10 shown in FIG. 1 includes a hollow pipe 12 made of fiber reinforced synthetic resin and a shaft joint 14 fixed to both ends of the pipe 12.
[0013]
Since the hollow pipe 12 shares the function of transmitting the rotational torque around the longitudinal axis by rotating the handle 6 in the longitudinal direction via the connecting shaft coupling 14 while rotating by itself, the film 3 The reinforcing reinforcing fiber is made of synthetic resin because it has physical properties that do not break due to torsional force when rotating while being wound, and because it is desirable to be lightweight when connected to the length of the film 3 of the tunnel 4. It is made of fiber-reinforced synthetic resin bound in
[0014]
The reinforcing reinforcing fibers are generally glass fibers from the viewpoint of strength or economy, but may be other fibers used for FRP, such as carbon fibers, aramid fibers, polyester fibers, vinylon fibers, and PBO fibers.
[0015]
The synthetic resin that binds the reinforcing reinforcing fiber can be a curable synthetic resin such as unsaturated polyester resin, epoxy resin, phenol resin, vinyl ester resin, or a relatively low viscosity thermoplastic that can be melt impregnated into the reinforcing fiber. Resin may be used, but unsaturated polyester resin is recommended from the viewpoint of economy and physical properties.
[0016]
The fiber-reinforced synthetic resin pipe 12 may have a single-layer structure of a fiber-reinforced synthetic resin layer, but as shown in FIG. 3, a three-layer structure in which the inside and outside of the fiber-reinforced synthetic resin layer are covered with a thermoplastic resin. It is desirable in terms of pipe productivity, handleability, and workability.
[0017]
The fiber-reinforced synthetic resin pipe 12 shown in FIG. 3 includes a fiber-reinforced synthetic resin layer 12a and inner and outer layers 12b and 12c made of a thermoplastic resin.
[0018]
The synthetic resin used for manufacturing the pipe 12 having such a three-layer structure includes an unsaturated polyester resin or a vinyl ester resin containing styrene as a crosslinkable monomer in the synthetic resin for binding in the fiber reinforced synthetic resin layer 12a. When used, the inner layer 12b has an acrylonitrile-butadiene-styrene resin (ABS resin), an acrylonitrile-styrene resin (AS resin), an acrylonitrile-acrylic-styrene resin (ABS resin) having chemical affinity with them. When selected from AAS resin), acrylonitrile-ethylenepropylene-styrene resin (AES resin), polystyrene resin (PS resin), polycarbonate resin (PC resin), etc., the inner layer 12b and the fiber reinforced synthetic resin layer 12a are chemically Can be bonded together to improve the compressive strength.
[0019]
If the same thermoplastic resin as the inner layer 12b is selected as the outer layer 12c, the pipe 12 as a whole can have high physical properties. However, in consideration of raw material costs, etc., low density polyethylene, linear low density polyethylene, etc. Various polyethylenes may be used.
[0020]
The diameter of the fiber-reinforced synthetic resin pipe 12 may be selected according to the rotational torque required depending on the length of the tunnel house, the thickness of the film 3 to be wound up or wound down, the winding width, etc. What is necessary is just about 10-30 mm.
[0021]
The length of the pipe 12 is preferably about 2 to 7 m in consideration of workability, storage property and the like.
[0022]
On the other hand, the shaft coupling 14 includes a circular flange portion 14a having substantially the same outer diameter as the pipe 12, an insertion portion 14b of the pipe 12 formed on one end side of the flange portion 14a, and the other end side of the flange portion 14a. The insertion piece 14c is formed to extend to the insertion piece 14d, and the fitting portion 14d is formed between the insertion piece 14c.
[0023]
In the case of the present embodiment, the insertion portion 14b is formed in a taper shape in which the base portion on the side of the flange portion 14a has substantially the same outer diameter as the inner diameter of the pipe 12, and the diameter is slightly reduced toward the distal end side. ing.
[0024]
The insertion piece 14c is on the side opposite to the insertion portion 14b and has a shape in which the outer periphery of the flange portion 14a having a circular outer periphery extends in the axial direction. In the case of the present embodiment, the center of the circular cross section of the flange portion 14a is cut out in a circular shape, and is divided at an equal angular interval of about 90 degrees with respect to the center, and this divided portion is along the circumferential direction. Every other piece is cut into a fan shape along the axial direction to form a fitting portion 14d, and the portion left by this notch is an insertion piece 14c.
[0025]
That is, in the case of the present embodiment, a pair of insertion pieces 14c formed in a substantially fan-shaped cross section are provided at positions opposed to the center, and adjacent to the circumferential direction of each insertion piece 14c, The same fan-shaped fitting part 14d is formed.
[0026]
According to the shaft joint 14 having such a shape, the insertion piece 14c of one joint is connected to the other joint with the one shaft joint 14 rotated approximately 90 degrees between the pair of shaft joints 14. By inserting into the fitting portion 14d, mutual fitting and connection having a circular shape having substantially the same diameter as the diameter of the pipe 12 can be performed, so only one type of joint is required.
[0027]
In addition, the shape of the insertion piece 14c and the fitting part 14d of the shaft coupling 14 of this invention is not restricted to the shape mentioned above, if the shape of the fitting part 14d can accept the insertion piece 14c. Any shape is acceptable.
[0028]
Furthermore, in the case of the present embodiment, an O-ring 14f that is locked so as to straddle between both insertion pieces 14c when a pair of shaft couplings 14 are fitted and connected to the outer periphery of the insertion piece 14c. Insertion groove 14e is provided.
[0029]
When the O-ring 14f is mounted in the insertion groove 14e when the shaft coupling 14 is fitted and connected, the coupling between the shaft couplings 14 can be reinforced. Since the torsional force due to the rotational torque is applied to the shaft coupling 14 configured as described above, the shaft coupling 14 is integrally formed by injection molding of a high physical property resin such as ABS resin or various engineering plastic resins.
[0030]
In addition, when attaching the shaft coupling 14 to the pipe 12, an adhesive may be applied to the insertion portion 14 a and inserted into the pipe 12. The shaft unit 10 has an arbitrary length using a plurality of pipes 12 and a shaft joint 14. At this time, the handle 6 shown in FIG. 4 is attached to the pipe 12 positioned at both ends or one end. Installed.
[0031]
The handle 6 shown in the figure has a fixing part 6a inserted and fixed in the pipe 12, a grip part 6b, and a latching part 6c. The latching portion 6c can fix and support the film 3 in the middle of winding or lowering at an arbitrary position by locking a bar or the like pierced into the ground to this portion.
Specific Example A glass fiber roving impregnated with an unsaturated polyester resin is provided along the outer periphery of an ABS resin pipe, and the outer diameter is drawn to 11.5 mm to form an uncured fiber reinforced synthetic resin layer. Then, this is led to a crosshead die of a melt extruder and coated with a molten low-density polyethylene in an annular shape so that the outer diameter becomes 12.5 mm, and immediately led to a cooling tank, and the surface and inner polyethylene coating Is cooled to form the inner layer 12b and the outer layer 12c, and then guided to a heat curing tank to cure the uncured unsaturated polyester resin to form a fiber reinforced synthetic resin tank 12a. Got.
[0032]
The pipe 12 had an inner diameter of 7.4 mm and an outer diameter of 12.5 mm. The pipe 12 is cut into 5 m and 3 m, and the pipe 12 is cut into 5 m and has the shape shown in FIG. 2, an insertion portion 14 b having an outer diameter of the rib portion of 7.5 mm and a length of about 20 mm, and an outer diameter. A shaft unit 10 is fixed by attaching an axial joint 14 having a flange portion 14a of 12.5 mm and an insertion piece 14c having a length of about 15 mm and corresponding to two pieces radially divided into four pieces by an adhesive. It was.
[0033]
On the other hand, the shaft unit 10 at the end to which the handle 6 is attached uses a pipe 12 of 3 m, a mounting hole for the handle 6 is provided on the mounting side of the handle 6, and a shaft coupling 14 similar to the above is provided on the other end side. Stuck.
[0034]
The shaft unit 10 having such a configuration is prepared as 9 m of 5 m and 1 m of 3 m, and is sequentially fitted and connected via the shaft coupling 14. The tunnel is 7.2 m wide, 50 m deep and 3.3 m wide inside. 2 was used as a winding core for winding and lowering the tunnel part of a house in which two rows were installed.
[0035]
The film 3 is fixed to the shaft unit 10 at the joint portion and the intermediate 2.5 m portion which are fitted and connected, and the film 3 is brought into contact with the pipe 12 of the shaft. This was done by covering a 7Φ packer.
[0036]
It has been confirmed that when such a shaft unit 10 is used as the core 5, the film 3 can be wound or unwound very easily and easily.
[0037]
【The invention's effect】
As explained in detail above , according to the shaft coupling used for winding and lowering the agricultural tunnel house covering material according to the present invention, the shaft unit serving as the winding core is composed of a fiber-reinforced synthetic resin pipe. , By effectively utilizing the characteristics of this type of pipe, such as lightness, high elasticity, and torsion resistance, the rotational force applied from the end is fitted and connected via a joint. By transmitting the entire length of the shaft unit and rotating it as a unit, the tunnel house covering material fixed to the shaft unit can be simultaneously wound or unwound over the entire length.
[0038]
Further, according to the shaft coupling used for winding and lowering according to the present invention, the shaft coupling is fixed to each shaft unit and can be fitted and connected to each other. In addition, it is easy to carry and store, and connection work can be done easily.
[Brief description of the drawings]
FIG. 1 is an overall explanatory view of a house to which a method for winding and lowering an agricultural tunnel house covering material according to the present invention is applied.
FIG. 2 is an explanatory diagram of a shaft unit and a shaft coupling used in the method.
3 is an exploded perspective view and an assembled perspective view showing an example of a fiber-reinforced synthetic resin pipe of the shaft unit shown in FIG. 2. FIG.
4 is a side view and a plan view showing an example of a handle attached to the shaft unit shown in FIG. 2. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Large house 2 Frame 3 Film 4 Tunnel 5 Core 6 Handle 10 Shaft unit 12 Fiber reinforced synthetic resin pipe 14 Shaft joint 14a ridge part 14b Insertion part 14c Insertion piece 14d Fitting part 14e Insertion groove

Claims (3)

One end side of the covering material of the tunnel house for agriculture is locked to the outer periphery of the winding core, the at least one end side of the winding core is rotated, and the covering material is wound around the outer periphery of the winding core. Of an agricultural tunnel house that is wound around the core by rotating at least one end of the core and rewinding the covering from the outer periphery of the core. A shaft coupling used for winding and lowering a covering material,
  The winding core is composed of a plurality of shaft units composed of a fiber-reinforced synthetic resin pipe and a shaft joint fixed to the pipe.
  The shaft coupling has a flange portion having substantially the same outer diameter as the outer diameter of the pipe;
  An insertion portion of the pipe formed on one end side of the flange portion;
  A plurality of insertion pieces formed to extend along the axial direction on the other end side of the flange,
  Agricultural tunnel house covering material comprising: a fitting portion that is provided along a circumferential direction between the insertion pieces and that receives an insertion piece of a shaft coupling attached to another pipe to be connected. Shaft coupling used for winding and lowering The insertion pieces and the fitting portions are alternately arranged along the circumferential direction of the flange portion, and the opposing positions of the circular cross section are cut out in a fan shape along the axial direction at intervals of approximately 90 degrees. The shaft coupling used for winding and lowering the agricultural tunnel house covering material according to claim 1, wherein the fitting portion is formed and the remaining notched portion is used as the insertion piece . An insertion groove of an O-ring that is locked so as to straddle between both insertion pieces when the pair of shaft couplings are fitted and connected is provided on the outer periphery of the insertion piece. A shaft coupling used for winding and lowering the agricultural tunnel house covering material according to Item 2.

Images