JP3538607B2 - Soil heat disinfection 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 soil heat disinfection device configured to heat disinfect soil in a field.

[0002]

2. Description of the Related Art Disinfection of crop pathogens by chemicals may adversely affect the natural environment and the like and, in addition, there are restrictions on their use. In recent years, hot soil (or steam) has been used in field soil. , And hereinafter referred to as boiling water.)
To disinfect by heating.

[0003] As a heat disinfection apparatus for soil for this purpose, the apparatus shown in Figs.
See 01-161794. )

[0004] In these figures, reference numeral 81 denotes a front wheel 8.
2 is a towed traveling frame provided on both the left and right sides, in which hot water supply pipes 83 are connected in an endless state, and a large number of protruding into the soil are provided on the rear supply pipes 83 in the traveling direction. The injection pipe 84 is connected in a comb-like manner.

[0005] The traction means 85 of the traveling frame 81 includes:
Towed bodies 86a to 86c such as wires and ropes are connected to the left and right sides and the center of the traveling frame 81 at three points, and these are bundled and connected to the main towed body 86, and the main towed body 86 is winch. , And the traveling frame 81 is pulled to the left in the figure.

Reference numeral 87 denotes a handle also serving as a damper, which is mounted on each of the left and right ends of the traveling frame 81 to prevent collision with an obstacle and to adjust the direction of the heating and disinfecting apparatus by operating the operator. Is what you do.

[0007] In the soil heating and disinfecting apparatus having the above-described configuration, hot water at about 90 ° C is supplied from a hot water supply hose 88 to an injection pipe 84 through a supply pipe 83, and the hot water penetrates into the soil. The soil is heat disinfected.

[0008]

However, in the above-mentioned heat disinfection apparatus, one of the left and right front wheels 82 and the handle 8
When the vehicle 7 falls into the concave portion of the field or pierces the convex portion, this becomes the running resistance, and the running frame 81 skews. Since there was no correction function, there was a problem that skew gradually increased.

Alternatively, even if the skewing of the traveling frame 81 is corrected by operating the handle 87 which also serves as a damper, it is necessary for the operator to cut off the skew, thereby saving labor. There was a problem in terms of.

[0010] The present invention has been made in view of such circumstances, and an object thereof is to provide a towed type heating and disinfecting apparatus,
The present invention has a self-correction function for a straight running posture so that the skew of the heating and disinfecting device is corrected by itself while saving labor.

[0011]

According to the present invention, a hot water supply pipe is provided on a towed running frame, and the hot water is supplied to the supply pipe by rushing into the soil of a field. In the soil heat disinfection device configured to heat disinfect the soil in the field, provided with a fluid introducing member in a rake shape to guide the inside of the soil, the traveling frame, a pair of left and right plate-shaped members that bite into the soil in the field, A pivoting arm pivotally pivotable about a vertical axis, and a towing arm pivotally pivotable about a vertical axis at a central portion between a pair of left and right plate members with respect to the traveling frame; and In a state in which the pair of left and right plate members is in a toe-out position (position in which the toes are opened and self-contained), the pair of left and right plate members and the towing arm are
The feature is that they are connected by an interlocking mechanism that swings them in the same direction (claim 1).

[0012] According to the soil heat disinfection apparatus having the above configuration, for example, when the traveling frame starts to skew leftward,
The towing arm swings to the right with respect to the traveling frame, and the pair of left and right plate members in the toe-out position also moves the toe (toe) inward of the frame. , And the right plate-like member swings such that the toe faces the outside of the frame.

[0013] With this configuration, the right plate-shaped member that directs the toe to the outside of the frame acts to apply running resistance to the right side of the running frame, so that the running frame changes its posture to the right.

When the running frame starts to skew rightward, contrary to the above, the running resistance is applied to the left side of the running frame, and the running frame changes its posture to the left. ADVANTAGE OF THE INVENTION According to the soil heat disinfection apparatus concerning this invention, skew is self-corrected, without requiring any artificial operation.

Instead of the above-mentioned plate-shaped member, this is a rotating member that rolls and rotates in a field scene, and the pair of left and right rotating members is in a toe-in position (a position in which the toes are closed and freely used). Even when the pair of left and right rotating members and the towing arm are connected by an interlocking mechanism that swings them in the same direction (claim 2), the heating and disinfecting apparatus can correct the skew by itself.

That is, for example, when the traveling frame starts to skew to the left, the towing arm swings rightward with respect to the traveling frame, and the right rotating member in the toe-in posture interlocks with this. However, the rocker swings the toe toward the outside of the frame, and the left rotating member swings the toe further toward the frame.

As a result, a state in which the steering wheel of the automobile is turned to the right appears, so that the running frame changes its posture to the right, and when the running frame starts to skew to the right, Contrary to the above, a state in which the steering wheel of the automobile is turned to the left appears, and the heating and disinfecting apparatus self-corrects the skew without any manual operation.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 6 show a soil heat disinfection device 1, and FIGS. 7 and 8 show a wire winding device 3 for pulling the soil heat disinfection device 1.

7 and 8 showing the wire take-up device 3, a reference numeral 4 denotes a gantry 4 erected on a base 5.
On one side of the gantry 4, a steady rest guide 6 and a guide pulley 7 for the wire 2 are provided.

8 is a pulley shaft, 9 is a drum shaft,
Each is mounted on the gantry 4 via a pair of bearings 10 and 10 with their axes parallel to each other.
A winding pulley 11 for the wire 2 is fixed to one end of the pulley shaft 8 in the same phase as the guide pulley 7 in a cantilever holding state.

Reference numeral 12 denotes a wire take-up drum which is cantilevered and held at one end of the drum shaft 9 so that it can be inserted and withdrawn.
The bearing 10 is provided with a spring receiving seat 13 on the bearing 10 side. Between the receiving seat 13 and the drum 12, a spring 14 for urging the drum 12 in the extracting direction is provided. Drum 1 from shaft 9
The wire winding drum 12 is configured to be rotatable integrally with the drum shaft 9 by providing a stopper 15 for preventing the second member 2 from coming out of the drum shaft 9.

Reference numeral 16 denotes a drive rotation mechanism for rotating the drum shaft 9 at a constant speed. The drive rotation mechanism 16 has a motor M and a reduction gear 17 connected to the motor M mounted on the base 5, and an output shaft of the reduction gear 17. 18 and the pulley shaft 8 are provided with sprocket wheels 19, 19, and both wheels 1
An endless chain 20 is wound around 9,19.

Reference numeral 21 denotes a constant torque clutch provided on the other end of the drum shaft 9, and reference numeral 22 denotes a speed increasing mechanism provided over the input member 23 of the constant torque clutch 21 and the pulley shaft 8. Is provided with sprocket wheels 24, 24 on the input side member 23 of the constant torque clutch 21 and the pulley shaft 8, respectively.
The wire winding diameter of the pulley 11 and the drum are set such that the endless chain 25 is wound around the wire 24 and the peripheral speed of winding the wire 2 by the drum 12 is greater than the peripheral speed of winding the wire by the pulley 11. Twelve wire winding diameters and pitch diameters of the wheels 19, 19, 24, 24 are set.

The wire winding device 3 having the above configuration
According to the method, one end of the wire 2 is connected and fixed to the drum 12, and the wire 2 is wound around the pulley 11 by one or two turns as appropriate, and the wire 2 is wound around the guide pulley 6. Through the wire 2
When the pulley shaft 8 is rotated at a constant speed in the wire winding direction in a state where the other end of the pulley shaft is connected to the heating and disinfecting apparatus 1, the wire winding drum 12 having a large peripheral speed is interlocked with the rotation of the pulley shaft 8. In addition, the wire 2 is wound while sliding and rotating by the action of the constant torque clutch 21.

On the other hand, since the pulley 11 rotates while maintaining the state of one or two turns of the wire 2 and always winds the wire 2 at a constant speed, the pulley 11 In spite of the fact that the diameter of the drum 12 increases substantially, the heating and disinfecting apparatus 1 is always towed at a constant speed.

Next, the heating and disinfecting device 1 pulled by the wire winding device 3 will be described with reference to FIGS.
Are mainly constituted by pipes 35 connected to each other to form a loop.

More specifically, a long unit and a short unit which can be connected and separated from a central unit 31A having a steering mechanism 32 for self-correcting the skew of the heating and disinfecting apparatus 1 to a straight traveling posture. Extension unit 31B, 31
C and an end unit 31D.

The brackets 33, 33 are connected to the center unit 31A and the extension units 31B, 31C, respectively, toward the front side of the traveling frame 31, and balloon-type wheels are attached to the brackets 33, 33. 34 are provided.

The pipe 35 formed in the loop of the running frame 31 is used as a hot water supply pipe. The hot water is supplied to the hot water supply pipe 35 on the rear side in the running direction into the soil of the field and the hot water is supplied to the inside of the soil. While providing the hot water introduction member 36 for guiding,
A hot water supply port a for supplying hot water toward the hot water introduction member 36 is formed in the hot water supply pipe 35, and a hot water introduction pipe 37 is further connected to the hot water supply pipe 35 so as to communicate with the hot water supply pipe 35.
By connecting the hot water supply hose 38 to the hot water introduction pipe 37, the soil heating and disinfecting apparatus 1 is configured.

Here, in this embodiment, the hot water introduction member 36 is made of a metal pipe, and a lower end portion on the rear side in the running direction is partially cut off, and the hot water introduction member 36 is connected to the hot water supply pipe 35. On the other hand, the hot water supplied from the hot water supply port a is sloping downward and obliquely downward, and provided in a rake shape at a predetermined interval in the longitudinal direction with respect to the supply pipe 35. To be derived.

Next, the steering mechanism 32 of the heating and disinfecting apparatus 1 will be described.
As shown in FIGS. 2 to 6, the bracket 5 is attached to the hot water supply pipe 35 of the unit 31 </ b> A at the center of the traveling frame 31 on the left and right sides thereof and forward in the traveling direction.
1, 51, and the brackets 51, 51
A receiving member 53 is pivotably connected to a pivot shaft 52 through a support shaft 52 for turning the axis in the vertical direction.
3, a pair of left and right plate members 54 that penetrate the soil of the field,
54 is attached.

A support shaft 55 for turning the axis in the vertical direction is provided at a central portion between the pair of left and right plate members 54, 54 of the hot water supply pipe 35 of the unit 31A at the center of the traveling frame 31. The pair of left and right plate members 5 is pivotally attached to the pair of left and right plate members 54 and 54 in a toe-out position.
4, 54 and the towing arm 56 are connected by an interlocking mechanism 57 that swings them in the same direction.

The interlocking mechanism 57 has arms 59, 59 connected to receiving members 53, 53 having a plate-like member 54, respectively, facing forward in the running direction. Rods 61, 61 are pivotally connected to the towing arm 56 via support shafts 60 whose axes are directed vertically.

When the soil is heated and disinfected by the heating and disinfecting apparatus 1 having the above configuration, for example, as shown in FIG.
2, a hot water supply hose 38 connected thereto is connected to the hot water introduction pipe 37, and a hot water supply port a of the supply pipe 35 is provided.
Thus, for example, hot water of about 90 ° C. is supplied to the hot water introducing member 36.

Thus, the hot water softens the soil around the hot water introduction member 36 and heat disinfects the soil. Here, the wire 2 connected to the heat disinfection device 1
The wire is taken up by the wire take-up device 3, and the heat disinfection device 1
Is pulled at a constant speed, the hot water introduction member 36 enters the softened soil and moves so as to form a groove at the rear thereof, while the hot water is supplied to the hot water introduction member 3.
6 and a part of the water flows into the above-mentioned grooves and penetrates into the soil evenly. Thereafter, the heat disinfection of the soil is continuously performed as the heat disinfection device 1 is driven by the traction. You will be

As shown in FIG. 6 (A), when the heating and disinfecting device 1 being pulled by the wire winding device 3 starts to skew, that is, when the wheels 34 fall into the concave portion of the field or become convex portions. When the traveling frame 31 starts to skew to the left, for example, the traveling arm 31 swings rightward relative to the traveling frame 31 when the traveling frame 31 starts to skew to the left. In conjunction with this, the rods 61, 61 swing the arms 59, 59, so that the left plate member 54 of the pair of left and right plate members 54, 54 in the toe-out position connects the toe to the frame 31. It swings inward, and the right plate-like member 54 swings so that the toe faces outward of the frame 31.

As a result, the right plate-shaped member 54 that directs the toe to the outside of the frame 31 acts so as to apply running resistance to the right side of the running frame 31, so that the running frame 31 changes its posture to the right. So, Figure 6
As shown in (B), the heating and disinfecting device 1 is self-corrected to the straight running posture.

When the running frame 31 starts to skew rightward, contrary to the above, the running resistance is applied to the left side of the running frame 31 and the running frame 31 changes its posture to the left. , Steering mechanism 3 having the above configuration
According to the heating and disinfecting apparatus 1 provided with 2, the skew is self-corrected without any artificial operation.

Therefore, in addition to the fact that the heating and disinfecting device 1 is pulled at a constant speed by the wire winding device 3, the skew of the heating and disinfecting device 1 is immediately self-corrected, that is, the heating and disinfecting device 1 Since the vehicle travels almost linearly without meandering, the soil is heated and disinfected with hot water efficiently.

As shown in FIGS. 9 and 10, instead of the above plate-like members 54, 54, these are formed as rotating members 63, 63 which roll and rotate the field scene with the pulling by the wire winding device 3. Specifically, as shown in FIG. 11A, a pair of left and right rotating members 63, 63 are used as the wide rotating members 63, 63 which are hard to penetrate into the field. And the pair of left and right rotating members 63, 63 and the towing arm 56 are
Even when these are connected by the interlocking mechanism 57 that swings in the same direction, the heating and disinfecting apparatus 1 self-corrects the skew.

That is, as shown in FIG. 11A, for example, when the traveling frame 31 starts to skew leftward, the towing arm 56 swings rightward with respect to the traveling frame 31, The right rotating member 63 in the toe-in posture swings so as to direct the toe to the outside of the frame 31, and the left rotating member 63 causes the toe to further direct the frame 31 to the inside of the frame 31. Rocks.

As a result, a state in which the steering wheel of the automobile is turned to the right appears, and the running frame 31 changes its posture to the right. As shown in FIG. 1 will be self-corrected to the straight running posture.

On the other hand, when the traveling frame 31 starts to skew rightward, a state in which the steering wheel of the automobile is turned to the left appears, contrary to the above description.
Self-correcting skew without the need for any artificial operations.

If it is desired that the depth of entry of the hot water introducing member 36 into the soil during the heat disinfection of the soil by the above-mentioned heating and disinfecting apparatus 1 be determined, as shown in FIG. The regulating member 64 for entering into the soil is formed into, for example, a sled shape, and
That is, it is sufficient to provide it on the side surface of No. 4.

Preferably, as shown in FIG.
The vertical holes c, c are formed in the vertical direction.
The pin insertion holes d, d are formed in the entry defining member 64 in phase with c, and fastening means 65 including a bolt inserted into both holes c, d and a nut screwed to the bolt is provided. The entry defining member 64 is configured to be vertically movable and fixable so that the depth of entry of the hot water introduction member 36 into the soil can be changed.

Instead of providing the defining member 64 on the plate-like member 54, as shown by phantom lines in FIG. 11, for example, a pair of brackets 6 are provided on the left and right sides of the central unit 31A.
6, 66, and an arm 67 is pivotally attached to the bracket 66 so as to be able to swing back and forth, and a lower end of the arm 67 is attached with, for example, a balloon-type wheel 68 that rolls and rotates on a field scene. A plurality of pin insertion holes e are formed on an arc line centering on the pivot 69 of the arm 67 with respect to the bracket 66, and a pin insertion hole f concentric with the pin insertion hole e is formed on the arm 67. Also, by appropriately selecting the pin insertion hole e of the bracket 66,
By inserting the stopper pin 70 through the pin insertion hole e and the pin insertion hole f formed in the arm 67, the depth of entry of the hot water introduction member 36 into the soil can also be changed.

At this time, the arm 67 is attached to the bracket 66 with the hot water introduction member 36 being lifted above the soil.
, That is, the bracket 66
The pin insertion holes e and f formed in the arm and the arm 67, and the stopper pin 70 selectively attached to the pin insertion holes e and f, allow the hot water introduction member 36 to be lifted above the field and to enter the soil of the field. If the posture switching means 71 for switching to the above is configured, by switching the posture of lifting the hot water introduction member 36 above the field, it is possible to easily move the heating and disinfecting apparatus 1 when the soil is not disinfected.

In place of the above-mentioned wheel 68, a sled-shaped member which can swing up and down can be used to change the depth of the hot water introduction member 36 entering the soil.

Although not shown, the hot water introduction member 36 is not shown.
As a means for introducing hot water into the field by
1, the pipe 35 on the front side in the running direction is used as a hot water supply pipe, and the hot water supply pipe 35 is provided with hot water introducing means by a hot water introducing member 36. The hot water supply pipe 3 is used as a supply pipe.
5 and 39, each of which is provided with hot water introduction means, and further provided with hot water introduction means in the hot water supply pipe 35 on the rear side in the traveling direction, and then on the pipe 35 on the front side in the traveling direction to the field scene. The hot water supply port may be formed such that hot water is supplied to the surface of the soil in advance.

Further, in the above embodiment, the hot water supply member 35 in the form of a metal pipe is provided in the hot water supply pipe 35 on the rear side in the running direction. However, the present invention is not limited to such a configuration. Instead of providing the hot water introducing member 36, screws 40 (see FIG. 15) such as a pan-head screw with holes are attached to a plurality of appropriate locations of the hot water supply pipe 35 so that the inside and outside of the hot water supply pipe 35 can be removed. Hole 40a leading to
Are formed, and the hot water in the hot water supply pipe 35 is supplied to the hole 40a.
May be sprayed directly onto the soil in the field. Here, the hole 40 a may be the hot water supply port a provided in the hot water supply pipe 35.

Further, in addition to the structure in which the hot water is directly sprayed from the hole 40a or the hot water supply port a formed in the hot water supply pipe 35 as described above, as shown in FIG. The hot water introduction member 36 formed in a rod shape (for example, a round bar shape) is disposed at a position corresponding to the above (for example, below each hole 40a or the hot water supply port a), and the hole 40a of the hot water supply pipe 35 or the hot water supply port is provided. The hot water derived from a may be supplied into the soil of the field through the rod-shaped hot water introduction member 36. In this case, the rod-shaped hot water introduction member 36 that penetrates into the ground allows the hot water to uniformly penetrate into the soil of the field, and the hot water is passed through the pipe-shaped hot water introduction member 36. In such a case, foreign matter such as soil may be clogged in the pipe, and the supply amount of hot water may decrease. However, the above-described configuration in which the hot water introduction member 36 is formed in a rod shape can maintain the supply amount of hot water substantially constant. Become.

In the above embodiment, the bracket 33,
Since the balloon-type wheels 34 are provided on the wheel 33, when the soil (ground) is somewhat hard, the wheels 34 can roll on the soil to easily move the heat disinfection apparatus 1, but when the soil is soft, The wheels 34 are buried in the soil, making it difficult to move the heating and disinfecting apparatus 1.
Therefore, the wheel 34 is configured to be detachable from the brackets 33, 33, and when the soil is soft, a plate-like member (e.g., The ski plate itself or one having a configuration similar thereto may be attached. In this case, the heating disinfection device 1
The whole is sled-shaped, and can be easily moved without being buried in the soil.

[0053]

As described above, in the first invention,
By providing a pair of left and right plate-like members that penetrate into the soil of the field and swing with the skew of the traveling frame in a towed-out traveling frame,
In the invention of the present invention, by rolling and rotating the field scene, a pair of left and right rotating members that swing with the skew of the traveling frame is provided in the towed traveling frame in a toe-in posture,
The self-correction to the straight running posture when the heating and disinfecting device is skewed can be automatically performed without any need for any artificial operation.

[Brief description of the drawings]

FIG. 1 is a plan view of a heating and disinfecting apparatus for soil.

FIG. 2 is a plan view of a central unit.

FIG. 3 is a front view of a unit in a central part.

FIG. 4 is a sectional view taken along line XX of FIG. 2;

FIG. 5 is a sectional view taken along line YY of FIG. 2;

FIG. 6A is an explanatory diagram showing a state of a leftward skewing of the heating and disinfecting apparatus, and FIG. 6B is an explanatory diagram showing a state of skew self-correction.

FIG. 7 is a plan view of the wire winding device.

FIG. 8 is a side view of the wire winding device.

FIG. 9 is a front view of a steering mechanism according to another embodiment.

FIG. 10 is a side view of the steering mechanism shown in FIG. 9;

FIG. 11 relates to the steering mechanism shown in FIG. 9;
(A) is an explanatory view showing a state of a leftward oblique movement of the heating and disinfecting apparatus, and (B) is an explanatory view showing a state of self-correction of the oblique movement.

FIG. 12 is an explanatory view showing a partially modified structure of the heating and disinfecting apparatus.

FIG. 13 is a plan view of a conventional heat disinfection apparatus.

FIG. 14 is a sectional view taken along line ZZ in FIG. 13;

FIG. 15 is an explanatory view schematically showing a deformed structure of a hot water introduction member.

[Explanation of symbols]

31: running frame, 35: hot water supply pipe, 36: hot water introduction member, 54: plate member, 56: traction arm, 57: interlocking mechanism, 63: rotating member, 71: posture switching means, a
... hot water supply port.

Continuation of front page (72) Inventor Takuho Yoshizuka 3-20 Kinugahara, Toyota-shi, Aichi Shinmei Industrial Co., Ltd. (56) References JP-A-2001-161794 (JP, A) JP-A-9-248008 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A01M 17/00 A01M 19/00

Claims (8)

(57) [Claims] 1. A traction type traveling frame is provided with a heating fluid supply pipe, and the supply pipe is provided with a fluid introducing member which rushes into the soil of a field and guides the heating fluid into the soil in a rake shape, A soil heat disinfection device configured to heat disinfect field soil, wherein a pair of left and right plate-like members that bite into the field soil are pivotally attached to a traveling frame around a vertical axis. On the other hand, a towing arm is pivotally attached to a center portion between the pair of left and right plate members with respect to the traveling frame so as to be swingable around a vertical axis, and the pair of left and right plate members is in a toe-out posture. And a pair of left and right plate-like members and a traction arm connected by an interlocking mechanism that swings them in the same direction. 2. A traction-type traveling frame is provided with a heating fluid supply pipe, and the supply pipe is provided with a rake-like fluid introducing member that rushes into the soil of the field and guides the heating fluid into the soil. A soil heat disinfection device configured to heat disinfect soil in a field, wherein a pair of left and right rotating members that roll and rotate in a field scene are pivotally attached to a traveling frame so as to be swingable around a vertical axis. On the other hand, a state in which a towing arm is pivotally attached to a central portion between the pair of left and right rotating members with respect to the traveling frame so as to be swingable around a vertical axis, and the left and right pair of rotating members are in a toe-in position. And a pair of left and right rotating members and a towing arm connected by an interlocking mechanism for swinging them in the same direction. 3. The soil according to claim 1, wherein the traveling frame includes a posture switching means for switching between a posture in which the fluid introduction member is lifted above the field and a posture in which the fluid introduction member is inserted into the soil in the field. Heating disinfection equipment. 4. A heating fluid supply pipe is provided on a towed traveling frame, and a fluid introduction member that rushes into the soil of a field and guides the heating fluid into the soil is provided on the supply pipe with respect to the supply pipe. It is arranged in a rake shape by inclining backward and obliquely downward.Furthermore, a fluid supply port for supplying a heating fluid to the fluid introduction member is formed in the supply pipe, and a pair of right and left that penetrate the soil of the field on the traveling frame. The plate-like member is pivotably connected to the traveling frame so as to be swingable around a vertical axis, and a towing arm is provided at a central portion between the pair of left and right plate-like members with respect to the traveling frame so as to be able to swing around the vertical axis. The pair of left and right plate members and the towing arm are connected by an interlocking mechanism that swings the pair of left and right plate members and the towing arm in the state of being pivotally attached and having the pair of left and right plate members in a toe-out posture. A soil heat disinfection device characterized by the above-mentioned. 5. A heating fluid supply pipe is provided on a towed traveling frame, and a fluid introduction member which rushes into the soil of a field and guides the heating fluid into the soil is provided on the supply pipe. It is arranged in a rake shape by inclining backward and obliquely downward, and a supply pipe for forming a fluid supply port for supplying a heating fluid to the fluid introduction member is formed in the supply pipe. A pair of rotating members are pivotally connected around a vertical axis, and a towing arm is pivotally mounted at a central portion between the pair of left and right rotating members with respect to the traveling frame so as to be pivotable about the vertical axis. The pair of left and right rotating members and the towing arm are connected by an interlocking mechanism that swings them in the same direction in a state where the pair of left and right rotating members are in a toe-in posture. Heat disinfection equipment for soil. 6. The fluid introduction member having a rod shape, wherein hot water drawn out of a supply pipe from the hot water supply port is supplied to soil in a field via the fluid introduction member. Item 6. The soil heat disinfection device according to any one of Items 1 to 5. 7. A heating fluid supply pipe is provided on a towed running frame, and a hole is formed in the supply pipe to connect the inside and outside of the supply pipe, and the heating fluid is directly sprayed into the soil of the field from the hole. A soil heat disinfection device configured to heat disinfect field soil, wherein a pair of left and right plate-like members that bite into the field soil are swingable about a vertical axis on a traveling frame. On the other hand, the towing arm is pivotally attached to a center portion between the pair of left and right plate members with respect to the traveling frame so as to be swingable around a vertical axis, and the pair of left and right plate members is toe-out. A soil heating and disinfecting apparatus comprising a pair of left and right plate members and a towing arm connected by an interlocking mechanism that swings them in the same direction in a posture. 8. A heating fluid supply pipe is provided on a towed running frame, and a hole is formed in the supply pipe to connect the inside and outside of the supply pipe, and the heating fluid is directly sprayed into the soil of the field from the hole. A soil heat disinfection device configured to heat disinfect the soil in a field, wherein a pair of left and right rotating members that roll and rotate in a field scene are swingable around a vertical axis on a traveling frame. On the other hand, the towing arm is pivotally attached to a central portion between the pair of left and right rotating members with respect to the traveling frame so as to be swingable around a vertical axis, and the pair of left and right rotating members is in a toe-in position. A heating and disinfecting apparatus for soil, wherein the pair of left and right rotating members and the towing arm are connected to each other by an interlocking mechanism that swings them in the same direction.