JP5280152B2 - Transplanter drilling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a punching device of a transplanter, in which a total calorific value of heaters can simply be adjusted by the switching of a switching portion to simply and well control the temperature of a heater block. <P>SOLUTION: There is provided the punching device of the transplanter in which a punching member having a plurality of heaters generating heat with an electric power supplied from a dynamo and a heater block heated with the heaters is liftably supported on a travel vehicle traveling in a state of stepping over a ridge, and lowered to contact the heater block with a multi-film covering the ridge, thereby forming a planting hole for planting a seedling on the ridge in the multi-film, characterized in that the heaters are connected to the dynamo in a state of being capable of being switched in a row or in series, and a switch portion for switching the heaters to a series connection or a parallel connection to the dynamo is disposed. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a perforation apparatus for a transplanter.

2. Description of the Related Art Conventionally, a punching device of a transplanting machine in which a planting hole for planting seedlings in a cocoon is formed in a multi-film is heated by a plurality of heaters that generate heat when power is supplied from a dynamo. A perforated body including a heater block is supported by a traveling body that travels across the reed so that it can be moved up and down, and when the perforated body is lowered, the heater block is brought into contact with the multi-film covering the reed to There is one in which holes for planting seedlings are formed in a multi-film (for example, Patent Document 1 and Patent Document 2).
In this type of conventional transplanter punching device, a plurality of heaters, which generate heat when power is supplied from a dynamo, are configured by a plurality of glow plugs, nichrome wires, etc., via a switch for turning on / off the dynamo. They were connected in series or in parallel (Patent Document 2). For example, in consideration of the heat generation amount and durability of the heater, three glow plugs are provided as a plurality of heaters, and three glow plugs (heaters) are connected in parallel to the dynamo. Although not present, Applicants have actually implemented this in the transplanter drilling device).
JP-A-10-28420 JP-A-11-9024

  When the engine is operated at a low speed or when it is used in the early morning when the wind is cold in a cold region, the heater is required to have high heat generation characteristics. Further, during warm days, the heater does not require high heat generation characteristics, and the heater block becomes heated. In such a case, it is conceivable to adjust the temperature by controlling the output of the dynamo, but the control is troublesome and the configuration of the circuit and the like becomes complicated. Also, there is a method of detecting the temperature of the heater block and adjusting the temperature by turning on and off the plurality of heaters, but it is necessary to frequently turn on and off the heater, and it is difficult to adjust the temperature satisfactorily.

  In view of the above-described problems, the present invention makes it possible to easily and satisfactorily adjust the temperature of a heater block by easily adjusting the heat generation amounts of a plurality of heaters by switching by a switch unit.

The technical means of the present invention that solves this technical problem is that a perforated body including a plurality of heaters that generate heat when power is supplied from a dynamo and a heater block that is heated by the plurality of heaters travels across a fence. When the perforated body is lowered, the heater block is brought into contact with the multi-film that covers the cocoon to form a planting hole for planting seedlings in the cocoon. In the drilling device of the transplanter thus made,
A plurality of heaters are connected to the dynamo so that they can be switched in parallel or in series, and a switch unit is provided that switches the plurality of heaters between series connection and parallel connection to the dynamo.

Another technical means of the present invention is provided with a plurality of sets of heater parallel circuits in which a plurality of heaters are connected in parallel, and the plurality of sets of heater parallel circuits are connected to a dynamo so as to be switchable in series and in parallel. A switch unit is provided for switching a plurality of sets of heater parallel circuits to a dynamo between a parallel connection and a series connection.
According to another technical means of the present invention, four heaters are provided, two heater parallel circuits in which the two heaters are connected in parallel are provided, and the two heater parallel circuits are connected in series with the dynamo. It is connected in parallel and is switchably connected, and is provided with a switch section for switching two sets of heater parallel circuits to a dynamo between a parallel connection and a series connection.

Another technical means of the present invention is that the heater block of the perforated body is made of stainless steel.
According to another technical means of the present invention, a temperature sensor for detecting the temperature of the heater block is provided. When the temperature detected by the temperature sensor exceeds a predetermined value, the switch unit is switched to a parallel connection, and the detected temperature is A switch control unit is provided that switches the switch unit to a serial connection when the predetermined value or less is reached.

  According to the present invention, a plurality of heaters are connected to a dynamo so that they can be switched in parallel or in series, and a switch unit that switches a plurality of heaters to a dynamo between series connection and parallel connection is provided. By switching by the unit, the heat generation amount of the plurality of heaters can be easily adjusted, and the temperature of the heater block can be adjusted easily and satisfactorily.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In FIG. 1, reference numeral 1 denotes a walking type transplanting machine for planting soil block seedlings 2 such as vegetables at predetermined intervals while moving in the longitudinal direction of the ridge R.
The transplanter 1 includes a traveling body 3 that travels in the longitudinal direction of the heel R across the heel R, a transplant device 4 provided on the rear side of the traveling body 3, and a support frame that supports the transplant device 4. 5 and a steering handle 7 for steering the traveling body 3.
The traveling body 3 includes a traveling machine body 9, a propulsion mechanism 10 that supports the traveling machine body 9 so as to travel, an engine 11 mounted on the traveling machine body 9, and the like.

The traveling machine body 9 includes a transmission case 12 and a base 13 attached and fixed to the front part of the transmission case 12 so as to project forward from the transmission case 12. The engine 11 is mounted on the front part of the base 13. Has been.
The propulsion mechanism 10 is a wheel / crawler having a pair of left and right front wheels 14 (wheel, front infinite rotator) and a pair of left and right crawler belts 15 (rear infinite rotator) as an infinite rotator that rotates by rotating the intercostal groove M. A combined type infinite rotation propulsion mechanism is adopted.
The propulsion mechanism 10 includes a front wheel 14, a front wheel support arm 17 that supports the front wheel 14, a crawler traveling device 18 that is disposed on the rear side of the front wheel 14, and a transmission case 19 that supports the crawler traveling device 18. Are provided on both the left and right sides of the traveling machine body 9.

The transplanting device 4 includes a seedling placing table 21 on which a seedling tray is placed and supported, a seedling removing device 22 that takes out the seedling 2 from the seedling tray on the seedling placing table 21, and a seedling supplied from the seedling removing device 22. A planting body 23 for planting 2 on the ridge R, a pressure-reducing wheel 25 (covering ring) for suppressing both the left and right sides of the seedling 2 planted on the ridge R, and a planting hole are formed in the multi-film laid on the field. A perforated body 27 and a leveling roller 28 (detection roller) that rolls on the upper surface of the ridge R on the front side of the perforated body 27 are provided.
The planting body 23 is supported by a lifting mechanism supported by the planting frame so as to be movable up and down. The planting body 23 is supplied with the seedling 2 from the seedling picking device 22 in a closed state at the top dead center at or near the top dead center of the vertical movement range, descends with the seedling 2 held inside, and moves up and down. By entering and opening the heel R on the bottom dead center side, a planting hole is formed in the heel R and the seedling 2 is discharged into the planting hole. Thereby, the seedling 2 is planted in the cocoon R.

A pair of left and right pressure wheels 25 are provided on the rear side of the planting body 23, rolls on both the left and right sides of the planting position of the seedling 2 on the upper surface of the heel R, and is put into a planting hole formed by the planting body 23. Press the soil on the left and right sides of the seedling 2.
The pressure wheel 25 supports the rear side of the planting frame, and is configured to change the planting depth by changing the vertical distance between the pressure wheel 25 and the planting frame 163. ing.
The leveling roller 28 rolls on the upper surface of the ridge R on the front side of the planting body 23 and the punched body 27 to level the upper surface of the ridge R and detects the height of the ridge R.

The perforated body 27 is supported by the planting frame via an elevating mechanism so as to be movable up and down. The perforated body 27 is disposed on the rear side of the leveling roller 28 and on the front side of the planting body 23 and is brought into contact with the multi-film when lowered. Thus, the multifilm is melted by the action of heat, so that a planting hole for planting the seedling 2 (for allowing the planted body 23 to enter the ridge R) is formed in the multifilm.
The planting body 23 is inserted into the ridge R through the planting hole drilled in the multi-film.
In FIG. 2, a perforated body 27 includes a heater block 31 that contacts the multi-film, a support conductor 32, a spacer 33 interposed between the heater block 31 and the support conductor 32, and a heater block 31 for heating the heater block 31. It has a plurality of glow plugs 35 (heaters, heating means).

The heater block 31 is made of stainless steel and is located below the support conductor 32. The spacer 33 is formed in a cylindrical shape having a vertical axis by a heat insulating material such as ceramic, and the mounting bolt is threaded into a screw hole formed in the heater block 31 through the support conductor 32 and the spacer 33. A spacer 33 and a heater block 31 are fixedly attached to the support conductor 32.
The support conductor 32 is formed with a screw hole 38 into which the heat generating portion 36 of the glow plug 35 can be inserted and into which the screw portion 37 of the glow plug 35 can be screwed. The spacer 33 has a heat generating portion of the glow plug 35. An insertion hole 39 through which 36 is inserted is formed in the vertical direction.

The heater block 31 has a cylindrical shape having a vertical axis. The heater block 31 is formed with an insertion hole 42 having an open top and a bottom where the heat generating portion 36 of the glow plug 35 is inserted.
The heat generating portion 36 of the glow plug 35 is inserted into the insertion hole 42 of the heater block 31 through the screw hole 38 of the support conductor 32 and the insertion hole 39 of the spacer 33, and the heater block 31 is heated by the glow plug 35. It is configured to be.
The plurality of glow plugs 35 are connected to the dynamo 45 so that power is supplied from the dynamo 45 to generate heat. Four glow plugs 35 are provided, two of the four glow plugs 35 are connected in parallel, and two sets of heater parallel circuits 46 in which the two glow plugs 35 are connected in parallel are provided. The two sets of heater parallel circuits 46 are connected to the dynamo 45 so as to be switchable in series and in parallel. A power switch 47 for on / off is provided between the dynamo 45 and the glow plug 35, and a switch unit 49 for switching the two sets of heater parallel circuits 46 to a dynamo 45 between a parallel connection and a series connection is provided. . The switch unit 49 includes a first switch 51 and a second switch 52 that move in conjunction with each other.

Each glow plug 35 constitutes a heater equivalent to 1Ω100W. When the two heater parallel circuits 46 are connected in parallel to the dynamo 45 by switching the switch section 49 (4 glow plugs 35 are arranged in parallel), 4 A heater equivalent to ¼ Ω 150 W is constituted by the glow plug 35, and two sets of heater parallel circuits 46 are connected in series to the dynamo 45 by switching the switch section 49 (the glow plug 35 is set in two parallel series). The four glow plugs 35 constitute a heater corresponding to 1Ω400W.
FIG. 3 shows the relationship between the output voltage and output current of the dynamo 45 with respect to the rotation of the dynamo 45 at 4000 rpm, 3000 rpm, and 2000 rpm. 3 shows that when two sets of heater parallel circuits 46 are connected in parallel to the dynamo 45 (4 parallels of the glow plug 35, 1 / 4Ω), two sets of heater parallel circuits 46 are connected to the dynamo 45. When connected in series (two parallel series of glow plugs 35, 1Ω), and when connected with three other glow plugs 35 in parallel (three parallel of glow plugs 35, 1 / 3Ω), two glow plugs 35 The relationship between the output voltage and output current of the dynamo 45 is shown for the case of parallel connection (two parallels of glow plugs 35, 1 / 2Ω).

  As can be seen from FIG. 3, when two sets of heater parallel circuits 46 are connected in parallel to the dynamo 45 by switching the switch unit 49 (4 glow plugs 35 are arranged in 4 parallel), the dynamo 45 rotates at 4000 rpm and 4 in parallel. At the operating point A, as shown in FIG. 3, the output voltage of the dynamo 45 is 6V, the output current is 25A, and the four glow plugs 35 constitute a 150 W heater. Further, when two sets of heater parallel circuits 46 are connected in series to the dynamo 45 by switching the switch unit 49 (two glow series 35 are connected in series in parallel), the dynamo 45 rotates at 4000 rpm and the two parallel series operating points B As shown in FIG. 3, the output voltage of the dynamo 45 is 20V, the output current is 20A, and the four glow plugs 35 constitute a 400 W heater.

Therefore, by switching the switch portion 49, a 400 W heater and a 150 W heater can be easily formed by the four glow plugs 35.
According to the above-described embodiment, when working by rotating the engine at a low speed or when used in the early morning when the wind is cold in a cold region, the heater is required to have high heat generation characteristics. In such a case, it is only necessary to connect the two heater parallel circuits 46 in series to the dynamo 45 by switching the switch unit 49 to the two parallel series side (if the glow plug 35 is two parallel series). As shown in FIG. 3, the dynamo 45 rotates at 4000 rpm, the two-series series operating point B has a dynamo 45 output voltage of 20 V and an output current of 20 A, and the four glow plugs 35 constitute a 400 W heater, When the dynamo 45 rotates at 3000 rpm, as shown in FIG. 3, the output voltage of the dynamo 45 is 18V, the output current is 18.5A, and the four glow plugs 3 The dynamometer 45 rotates at 2000 rpm, and the 2-parallel series operating point B2 has a dynamo 45 output voltage of 15V and an output current of 15A as shown in FIG. A 225 W heater is configured.

  In addition, during the warm day, the heater does not require high heat generation characteristics, and the heater block 31 is heated. In such a case, it is only necessary to connect the two heater parallel circuits 46 to the dynamo 45 in parallel by switching the switch unit 49 to the 4 parallel side (if the glow plug 35 is arranged in 4 parallel). As shown in FIG. 3, the output voltage of the dynamo 45 is 6V, the output current is 25A, and the four glow plugs 35 constitute a 150 W heater, and the dynamo 45 rotates 3000 rpm. As shown in FIG. 3, at the 4 parallel operating point A1, the output voltage of the dynamo 45 is 6V and the output current is 24.5A, and the four glow plugs 35 constitute a 147 W heater, and the dynamo 45 rotates at 2000 rpm. As shown in FIG. 3, at the four parallel operation points A2, the output voltage of the dynamo 45 is 5.5V and the output current is 23.5A, so that four glow plugs 5 to construct the heater of 129W.

Accordingly, the heater block 31 can be easily and satisfactorily adjusted in temperature by easily adjusting the heat generation amount of the plurality of glow plugs 35 by switching the switch unit 49.
Further, since the heater block 31 is made of stainless steel, compared to the conventional heater block 31 made of hawkin, stainless steel is harder to heat and cool, so the heater block 31 is less susceptible to temperature changes and has a desired temperature. Can be held stably, and when the perforated body 27 is lowered, the heater block 31 is brought into contact with the multi-film, whereby the planting holes can be reliably formed in the multi-film.

  FIG. 4 shows another embodiment, in which a temperature sensor 55 for detecting the temperature of the heater block 31 is provided, and the switch unit 49 is constituted by three switching elements 57, 58, 59 constituted by bidirectional semiconductor switches such as thyristors. When the detected temperature of the temperature sensor 55 exceeds a predetermined value (for example, 540 ° or higher), the switch unit 49 is switched to a parallel connection, and when the detected temperature becomes a predetermined value (for example, 450 ° or lower). A switch control unit 61 that controls each of the switching elements 57, 58, and 59 is provided so as to switch the switch unit 49 in series connection. That is, the switch control unit 61 controls the switching element 57 to be turned on, the switching element 58 to be turned on, and the switching element 59 to be turned off when the temperature detected by the temperature sensor 55 becomes equal to or higher than a predetermined temperature. When the voltage becomes equal to or less than a predetermined value, the switching element 57 is turned off, the switching element 58 is turned off, and the switching element 59 is turned on. Other points are the same as those in the above embodiment.

According to the above embodiment, when the temperature of the heater block 31 rises to a predetermined level or higher, the switching control unit 61 controls the switching element 57 to be on, the switching element 58 to be on, and the switching element 59 to be off. 49 is switched to parallel connection. If the temperature of the heater block 31 rises to a predetermined level or higher, the switch control unit 61 controls the switching element 57 to be turned off, the switching element 58 to be turned off, and the switching element 59 to be turned on, so that the switch unit 49 is connected in series. Switch.
Therefore, as in the case of the above-described embodiment, the heater block 31 can be easily and satisfactorily adjusted in temperature by simply adjusting the heat generation amount of the plurality of glow plugs 35 by switching the switch portion 49. Further, the temperature of the heater block 31 can be automatically maintained within a predetermined range. In addition, switching between the parallel connection and the series connection does not require a frequent switching operation of the switch unit 49 because the difference in heat generation in the heater portion due to the switch switching is not large compared to the on / off control of the power switch. 49 can be controlled more easily, and the temperature change of the glow plug 35 to the heater block 31 is reduced, and the durability of the glow plug 35 and the heater block 31 can be improved.

  In this embodiment, four glow plugs 35 are provided. However, two or more glow plugs 35 may be provided. When two glow plugs 35 are provided, two glow plugs 35 may be provided. The glow plug 35 may be switched between the two glow plugs 35 in parallel and in series by the switch 49. When six glow plugs 35 are provided, for example, three glow lamps are connected in parallel. The two sets of parallel circuits may be configured, and the two sets of parallel circuits may be switched between parallel connection and series connection by the switch unit 49. For example, three sets of parallel circuits in which two glow lamps are connected in parallel may be used. A circuit may be configured, and the three sets of parallel circuits may be switched between the parallel connection and the series connection by the switch unit 49.

  In the above-described embodiment, the glow plug 35 is used as a heater that generates heat when power is supplied from the dynamo 45. Instead of the glow plug 35, nichrome is used as a heater that generates heat when supplied with power from the dynamo 45. Lines and others may be used.

It is a block diagram which shows embodiment of this invention. It is a block diagram of a punching device. It is a graph which shows the output characteristic of a piercing | piercing body. It is a block diagram of the punching apparatus which shows other embodiment.

Explanation of symbols

R ２７ 27 Perforated body 31 Heater block 35 Glow plug 46 Heater parallel circuit 49 Switch unit 61 Switch control unit

Claims (5)

A perforated body (27) including a plurality of heaters (35) that generate heat when power is supplied from a dynamo (45) and a heater block (31) that is heated by the plurality of heaters (35) When the perforated body (27) is lowered and supported by the traveling body (3) that travels across the straddle, the heater block (31) is brought into contact with the multi-film covering the scissors (R), so that the scissors (31) In the punching device of the transplanting machine in which the hole for planting for planting the seedling in R) is formed in the multi-film,
A plurality of heaters (35) are connected to the dynamo (45) so as to be switchable in parallel or in series, and a switch unit (49) that switches the plurality of heaters (35) between series connection and parallel connection to the dynamo (45). ) Is provided.   A plurality of heater parallel circuits (46) in which a plurality of heaters (35) are connected in parallel are provided, and the plurality of heater parallel circuits (46) are connected to the dynamo (45) so as to be switchable in series and in parallel. 2. The transplanter drilling machine according to claim 1, further comprising a switch unit (49) for switching a plurality of sets of heater parallel circuits (46) between a parallel connection and a series connection with respect to the dynamo (45). apparatus.   Four heaters (35) are provided, two sets of heater parallel circuits (46) in which two heaters (35) are connected in parallel are provided, and two sets of heater parallel circuits (46) are connected to the dynamo (45). And a switch unit (49) for switching the two heater parallel circuits (46) between the parallel connection and the series connection with respect to the dynamo (45). The perforation device for a transplanter according to claim 1 or 2.   The perforating apparatus for a transplanter according to any one of claims 1 to 3, wherein the heater block (31) of the perforated body (27) is made of stainless steel.   A temperature sensor (55) for detecting the temperature of the heater block (31) is provided. When the detected temperature of the temperature sensor (55) exceeds a predetermined value, the switch unit (49) is switched to a parallel connection, and the detected temperature is The perforation apparatus for a transplanter according to any one of claims 1 to 4, further comprising a switch control unit (61) for switching the switch unit (49) to a serial connection when the predetermined value or less is reached.

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