JP2601729B2 - Tunnel film stretching device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is an apparatus for driving an inverted U-shaped column in the transverse direction of a ridge while driving the column at predetermined intervals, and then covering the film on the frame body in succession. About.

[Conventional technology]

As an apparatus for stretching a long synthetic resin film on a ridge in a tunnel shape, there are proposed (1) Japanese Patent Application Laid-Open No. 61-282024, and (2) Japanese Utility Model Application Laid-Open No. 62-33554.

These devices support the inverted U-shaped column with a holder,
By means of a transfer device, the struts are transferred towards the penetrating device, supplied one by one at the receiving position of the penetrating device, and the cylinder device of the penetrating device is operated to push the lower end of the strut into the soil on both sides of the ridge. I have to.

[Problems to be solved by the invention]

However, the device of the above (1) is a device of a type in which a support is supplied from the rear of the pushing device, and when driving the support, it is necessary to stop and operate the tractor one by one at the driving position. There was a problem that the driving work could not be performed.

Further, since this device requires a strut driving device, a strut feeding device for supplying struts to the striking device one by one, and a strut holder for holding a large number of struts, a series of operations are performed. The device to be enlarged becomes a device that cannot be turned around as a whole. Further, since the long horizontal frame is arranged on the lower side behind the driving device, the pushed-in strut passes between the horizontal frames, and the frame body is not overturned by the horizontal frame. There is a problem that the shape and size of the support are limited.

On the other hand, in the case of the device (2), the strut is supplied from the front of the driving device. In the case of this device, projecting pieces are projected horizontally on both sides of the lower portion of the strut, and Is pressed by the presser wheel and pushed into the field.
Therefore, it is necessary to use a special shape for the column, and it is necessary to fix the protruding piece that engages with the pressing body at a predetermined position. This increases the manufacturing cost of the column, and also increases the cost of handling the column. However, there is a problem that the operation is difficult due to the catch of the projection.

A large number of inverted U-shaped columns supported by the column transport section are transported as a group from the film covering section, which is the rearmost section, to the column driving section, and it is necessary to separate and drive each of the groups from this group. However, in the conventional apparatus, a conveyor or the like is used as a means for transporting the columns in the column driving portion, but the apparatus becomes large and expensive.

There is also a method using a spring, but this method requires a large spring and is not suitable for transporting a large number of columns.

The present invention has been obtained to solve the problems of the conventional tunnel-like film stretching apparatus,
An object of the present invention is to provide a device capable of driving a strut into a predetermined position on a field while moving, and a means for smoothly conveying a strut supported by a strut transfer portion to a strut driving portion. It is in.

[Means for solving the problem]

To achieve the above object, a tunnel-like film stretching apparatus according to the present invention includes a column driving portion for driving a lower end portion of an inverted U-shaped column into a field, and a column that transports the column forward from the rear to the column. A column transport unit that supplies columns to the driving unit, and a film provided on the back of the column transport unit, unwraps the film from the film roll, and coats the film on the column that is driven into the field, and both ends of the film. An apparatus comprising a film covering section for covering the soil, wherein the support section is provided with a member for guiding at least three places of the top and both legs of the support, and a rail provided in parallel with the member for guiding the top of the support. With a column pushing tool that is guided by this rail and always abuts the rear surface of the column,
The strut pusher is connected to a pressing means that constantly urges the strut driving portion side, and the strut held by the guiding member is sequentially extruded and conveyed to the strut driving portion side. is there.

(Operation)

The strut held by the member that guides the top of the strut and the three legs, both legs, is constantly urged toward the striking portion by the pressing means linked to the strut pusher, so many struts are stable in three places. The strut can be smoothly transferred to the strut driving portion in the front while being held in a proper manner.

〔Example〕

 Next, an embodiment of the present invention will be described with reference to the drawings.

The tunnel-like film stretching apparatus according to the present invention performs a striking operation of a column while being vertically indexed by a lift cylinder of a hydraulic elevating mechanism via a work machine connecting link mechanism of a tractor and being indexed.

The tunnel-like film stretching apparatus according to the present invention is configured by arranging a column pushing portion 1 at a front portion, and arranging a column conveying portion 2 and a film covering portion 3 behind the column pushing portion 1.

(Pole driving section)

The frame 1a constituting the strut driving portion 1 is connected to the working machine link mechanism of the tractor, and supports the strut pressing plate 1b on the rear surface thereof in a vertically movable manner, and the frame 1a and the strut pressing plate 1b Driving cylinder that can be extended and retracted between
1c (hydraulic cylinder) can reciprocate up and down.

A pressing plate 1d for pressing the upper surface of the column 30 is attached to the rear surface of the column pressing plate 1b by bolting a mounting plate 1d 'fixed to the column, and a column pressing plate of the pressing plate 1d. 1b has three support pressing guides 1f and the pressing plate 1dt
Is provided with the same thickness as the width.

A rail 1g is provided at the center of the front surface of the column pressing plate 1b, and a rail 1h is provided at both ends.Rollers 1g 'provided on the frame 1a side are fitted to the rail 1g, and 1h' is fitted to the rail 1h. The column pressing plate 1b is guided with respect to the frame 1a so as to move up and down as indicated by arrows.

On the rear surface of the frame 1a, a squeezing arm 1i for pressing the lower part of the column 30 inward is rotatably supported by a rotating branch 1i ', and a roller 1j provided at one end of the squeezing arm 1i is provided on the rail. It is pulled by the elastic force of the spring 1k and is in contact with the arm operating plate 1o (a kind of cam) provided on the side of 1h. And at the other end of the narrowing arm 1i, a strut narrowing material 1m and a strut separation plate 1n are provided on the strut narrowing material 1m, and give a squeezing action to narrow the legs when the strut 30 is driven. .

(Prop transport section)

The column transport unit 2 provided behind the column driving unit 1 is inclined forward by an angle β as a whole, and the column transport unit 2 is supported at the rear by a frame 2q provided orthogonal to the frame 1a. It is configured as follows. That is, a support guide 2a that supports the top 30a of the arc portion as a member for guiding the arc-shaped portion 30a of the column 30, and the top 30a
A column guide 2b for supporting both sides 30b of the column is arranged, and a column guide 2c is provided above the column guide 2a in parallel so as to sandwich the column 30 up and down.

The support guide 2c is fixed to a guide release tool 2d supported on the top of the frame 1a so as to be able to lie down.
When replenishing 30, it is configured to rotate as shown by the arrow to open the upper surface of the column guide 2a.

2e is a support guide for supporting the lower end of the leg of the support 30, the cross section of which is formed in a gutter shape, and the outer plate is preferably rotated as shown by the arrow in FIG. 2 to open the guide surface. It is also possible to make it easier to insert the lower end of the column 30. Furthermore,
Above the column guide 2a, a column guide 2f for guiding the outer surface of the straight portion of the column 30 is provided.

In this embodiment, the guide for guiding the support 30 is a support guide 2a, two support guides 2b, and two support guides 2e.
The guide preferably stably guides the column 30 by three-point support.

Below the support guide 2a and between the support guides 2b, 2b, a rail 2g is provided in parallel with the support guide 2a,
It guides the column pushing tool 2h fitted to this and pulled by a weight described later.

A rope hook 2i is provided above a slide portion 2h 'having a cross section that fits with the rail 2g of the support pusher 2h, and one end of a rope 2j is fixed to the rope hook 2i.
Is connected to a hook 2r provided on a weight 2m via pulleys 2k, 2k ', 2k ", and the weight 2m is guided into a cylindrical weight guide 2n provided on the front surface of the frame 1a. ing.

The lower portion of the weight guide 2n is closed by a weight stopper 2p that can be attached and detached with a thumb screw or the like, and
The fall of 2m is prevented. The middle of the rail 2g is supported by a frame 2q.

The rope 2j is disposed so as to extend between the rope hook 2i and the pulley 2k in parallel with the strut guide 2c, and has an angle corresponding to the angle β with the field G. When the number of rods decreases and the column pushing tool 2h approaches the pulley 2k, the angle β ′ is reversed. The change from this angle β to β 'can be achieved by pulling the support pusher 2h forward with the weight 2m.
Although the force for moving 30 is substantially constant in the column guide, when the rope hook reaches the position 2i ', the angle of the rope 2j changes to β', and the column 30 is moved into the column driving portion 1.
The force for transporting to is weakened. This can prevent the poles 30 from becoming entangled with each other and supply being impossible.

Further, a column holding guide 2s is provided at the tip of the column guide 2a so that the column 30 pressed and lowered by the column pressing plate 1b is held on the surface of the column pressing plate 1b.

FIG. 3 shows a partial deformation of the column transport section 2. A support 40 is erected on a slide section 2h 'fitted to the rail 2g, and a cylindrical section 41 is fixed to the tip of the support 40. The pressing member 42 is configured so that an elastic force is applied by a spring 43 by a cylindrical portion 41.

The pressing body 42 is provided to press the top 30a of the support 30 via a spring 43.
The pressing force of the weight 2m can be applied to the point stably. By adjusting the setting force of the spring 43, the pressing force is adjusted to apply a uniform pressing force to the slide resistance when the column 30 is conveyed on the column guide, and the column 30 is moved. It can be transported to the driving section 1 smoothly.

(Film cover)

The film covering part 3 is connected to the rear part of the frame 2q whose front end is fixed to the frame 1a, the groove notches 3a are arranged on both sides of the fuselage, and the film roll 3c is supported by the frame 3b and is fed out from this. The film f is developed and transported by the roll 3d. Further, a film pressing wheel 3e and a mud pulling wheel 3f are provided on both sides of the column 30 driven into the field G.

A gauge wheel 4 having a tip of a positioning member 4b and a supported foil 4a is provided in front of the strut driving portion 1.
It is fixed to the lower end of 1a.

[Operation of film stretching device]

The tunnel-like film stretching apparatus having the above-described structure is indexed by connecting the machine so as to be able to ascend and descend by a lift cylinder of a hydraulic elevating mechanism via a working machine connecting link mechanism of a tractor (not shown).

In this state, the device is inclined such that the frame 1a as a whole is inclined rearward at the angle α. The support 30 is guided by various guides inclined forward at an angle β, and guided toward a support pressing plate 1b inclined backward at an angle α.

When using this device, the film coating unit 3
Attach the film roll 3c. The support guide 2c of the support transport unit 2 is retracted from a predetermined position by operating the guide release tool 2d to support the support 30 on the support guide 2a. Then, the support guide 2c is returned to the original position, and the support guide 2c is returned to the original position. 2a and
A plurality of columns 30 are supplied with the top of the column 30 held between the column 2c and the arc portion supported on the column guide 2b, and the end of the leg inserted into the column guide 2e. I do.

Next, a column extruding tool 2h guided by the rail 2g is arranged at the rear end of the column 30, and a cylindrical weight guide 2n is provided at one end to a rope hook 2i protruding above the column extruding device 2h.
The other end of the rope 2j to which the weight 2m accommodated up and down is accommodated is attached.

The rail 2g that guides the support pusher 2h is the guide 2a, 2c.
The front is inclined low at an angle β in parallel with the rope, and a rope 2j is stretched almost along this inclination, and the column pushing tool 2h
Can apply a uniform pressing force to the column 30 up to the tip end.

Next, when the pressure oil is supplied from the hydraulic mechanism of the tractor to the hydraulic cylinder 1c via the hydraulic pipe 1c 'to raise the column pressing plate 1b, the column 30 located at the forefront of the column transport unit 2 becomes an arc portion. Strut pressing plate formed in an arc shape according to the shape of
Fits at the bottom of 1d. The lower part of the column 30 is separated from the guide 2e while being supported by the support squeezing 1m and the support separation plate 1m.

The arm 1i is pressed by the contact surfaces of the arm operating plates 1o provided on both sides of the column pressing plate 1b as the column pressing plate 1b descends, and the arm 1i is rotated to the left. The lower end of the support 30 is separated from the other support groups, and the distance between the two ends of the support 30 is reduced by the lift of the arm operating plate 1o by the support narrowing material 1m.

And the support 30 whose interval between both ends is narrowed as described above
Is driven into the field G together with the downward movement of the support pressing plate 1b.

The striking operation of the strut 30 is performed while the tractor is running. However, since the frame 1a is inclined at an angle α rearward with respect to the surface of the field G as shown in FIG. While standing up as the vehicle travels, the vehicle is finally driven by a predetermined depth substantially perpendicular to the field G.

Subsequent to the driving operation of the column 30, the film covering portion 3
A groove is dug at a position near both edges of the tunnel-like film f by the slicer 3a with the movement of. The film f fed from the film roll 3c moves while being stepped on both sides by the film pressing ring 3e, and the stepped portion is covered with a mud baffle 3f to cover the tunnel-like film supported by the column 30. Complete.

In addition, as shown in FIG.
And the back is inclined at an angle β such that the back is away from the field G, so that the support 30 driven by the support driving unit 1 works in a state where the space of the support transfer unit 2 gradually expands. Proceeds, and can be accurately driven without falling down, inclining, or falling out of contact with each guide member or the like constituting the column transport section 2. Also,
Even if the width of the body is narrow, the strut 30 that has been driven in will not be overturned, so that a downsized device can be provided.

〔The invention's effect〕

A tunnel-like film stretching device according to the present invention, a strut driving portion for driving a lower end of an inverted U-shaped strut into a field,
A column transport unit that transports the column forward from the rear and supplies the column to the driving unit, and a column transport unit that is provided behind the column transport unit,
An apparatus comprising a film covering portion for uncovering a film on a support struck into a field by unwinding the film from a film roll and covering both ends of the film, wherein the support transfer section includes at least the top of the support and both legs. And a rail provided in parallel with the member that guides the top of the column, and a column pusher that is guided by the rail and always abuts the rear surface of the column.
The strut pusher is connected to a pressing means that constantly urges the strut driving portion side, and the strut held by the guiding member is configured to be sequentially extruded and conveyed to the strut driving side. At least three of its top and both legs
A large number of columns on the transport section can be continuously and smoothly transferred to the column driving section by the pressing means constantly biased to the column driving side while being held in a stable manner at the point.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, FIG. 1 is a side view of a tunnel-like film stretching apparatus, FIG. FIG. 3 is a view showing another embodiment of the column pushing tool. 1… Pole driving section 1a… Frame, 1b… Post pressing plate, 1c… Punching hydraulic cylinder, 1e… Post holding spring, 1f… Post pressing guide, 1g …… Rail, 1g '… … Roller, 1h …… Rail, 1h ′… Roller, 1i …… Narrow squeezing arm, 1i ′
…… Roller, 1j …… Spring, 1k …… Spring, 1m
… Narrow squeezed material for columns, 1n… Column separation plates,…… Column transport sections 2a, 2b, 2c, 2e, 2f… Column guides, 2d… Guide release tools,
2g… Rail, 2h… Pole pusher, 2i… Rope hook, 2j …… Rope, 2k …… Pulley, 2m …… Pole push weight, 2n… Weight guide, 2p …… Weight stopper, 2r … Hook, 2s… Post support guide, 3… Film covering part 3a …… Groove cutting tool, 3c …… Film roll, 3d …… Film feeding roll, 3e …… Film pressing ring, 3f… .

Continuation of front page (56) References JP-A-4-135421 (JP, A) JP-A-60-149324 (JP, A) JP-A-3-83043 (JP, U) JP-A-3-34759 (JP) , U) Actually open sho 59-101644 (JP, U)

Claims (1)

(57) [Claims] 1. A strut driving portion for driving a lower end portion of an inverted U-shaped strut into a field, a strut conveying portion for conveying a strut from the rear to a front and supplying a strut to the strut driving portion, An apparatus comprising a film covering unit provided behind a column transport unit, unwrapping a film from a film roll, coating the film on a column driven into a field, and covering soil at both ends of the film. The part is a member that guides at least three points, that is, the top and both legs of the column, a rail that is provided in parallel with the member that guides the top of the column, and a column that is guided by the rail and always abuts the rear surface of the column. And a pushing means which constantly urges the column pushing unit toward the column driving unit, and sequentially pushes and holds the columns held by the guiding member to the column driving unit side. A film that is configured for Stretching device.