JP4771388B2 - Synthetic resin sheet fusion device for agricultural heat insulation sheet - Google Patents

Description

  The present invention is installed along the side of an agricultural house (vinyl greenhouse, glass greenhouse, etc.), insulated from the outside air by the air in the house sent into the house, and kept warm at a constant temperature. The present invention relates to a synthetic resin sheet fusion apparatus for sheets (hereinafter referred to as heat insulation sheets).

  In the agricultural house, for example, as shown in Patent Document 1, a heat insulating sheet is attached to insulate the house room from the outside air and keep the room at a constant temperature. The heat insulation sheet is formed by bonding a rectangular synthetic resin sheet to a central portion so that a plurality of air passages extend in the horizontal direction, and filling each air passage with air flowing in from one air inlet. It is heated by sunlight, and the heated air is sent from the air outlet into the agricultural house to warm the room.

  In order to manufacture this type of heat-insulating sheet, two synthetic resin sheets stacked in a long shape are heat-sealed so as to have a plurality of air passages in the central portion while feeding in the longitudinal direction. Conventionally, when a heat insulation sheet is manufactured using, for example, a vinyl chloride resin sheet, for example, a high-frequency heating device shown in Patent Document 2 is used as a fusing mechanism of a synthetic resin sheet fusing device. In order to fuse a synthetic resin sheet having an elongated orthogonal direction with a plurality of air passages provided in the center, a plurality of high-frequency heating devices must be arranged in the orthogonal direction of transfer. However, there is a problem that the device itself is increased in size and cost.

  In addition, in the synthetic resin sheet fusion apparatus using the above-described high-frequency heating device, a transfer mechanism for transferring the synthetic resin sheets stacked in addition to the high-frequency heating device is required, so the structure of the device itself is complicated. There is a problem that the cost increases.

  Further, for example, when a heat insulation sheet is manufactured using a polyethylene resin sheet, the above-described high-frequency heating device cannot be fused, and the synthetic resin sheets are fused together using a long hot plate. However, in the hot plate fusing mechanism, it is difficult to fuse the synthetic resin sheets at a narrow interval.

  Further, the present applicant provides a plurality of air circulation portions extending in the horizontal direction in a multi-stage shape in the vertical direction, and heats the air inside each air circulation portion to insulate the agricultural house from the outside air and heat it. We proposed a heat insulation sheet for use in agricultural houses. In the heat insulation sheet, when the supply of heated air into each air circulation section is interrupted, the moisture contained in the air accumulated inside is prevented from being condensed due to the outside air. Therefore, when two synthetic resin sheets are fused, a non-fused portion is provided in the fused portion between the air circulation portions so that they can communicate with each other, and the non-fused portion accumulates inside. The condensed water can be discharged to the outside.

  However, in a high-frequency heating device and a hot plate fusion device, when two superposed synthetic resin sheets are fused while providing a plurality of stages of air circulation portions, a non-fusion portion as a drainage portion Could not be formed simultaneously.

JP 2002-95362 A JP 2000-43147 A

  The problem to be solved is to use a high-frequency heating device as a fusing mechanism of a synthetic resin sheet fusing device to fuse two synthetic resin sheets that are stacked in the direction perpendicular to the transfer direction. The need for a plurality of high-frequency heating devices and a transport mechanism for transporting the synthetic resin sheet in the direction orthogonal to the synthetic resin sheet transfer makes the structure of the device itself complicated and large, and increases the cost. It is. Further, in the mechanism for sandwiching and fusing the synthetic resin sheet by a pair of hot plates, it is difficult to fuse the synthetic resin sheet at a narrow interval.

The present invention has a predetermined interval in a direction orthogonal to the transfer direction of at least two superposed synthetic resin sheets constituting the agricultural heat insulation sheet, and is rotated and overlapped in the transfer direction. A plurality of first and second transfer rotators for transferring the synthetic resin sheet, a rotation driving means for synchronizing the first and second transfer rotators in the transfer direction, and the first and second transfers. A plurality of supports disposed on the upper side opposite to the rotating body are respectively provided on the upper side in the transfer direction, and are fused in contact with the synthetic resin sheet supported on the opposite first transfer rotating body to rotate in the transfer direction. A rotating member, a heating member that heats each fusing rotator, a first actuating member that moves each fusing rotator in a direction of moving toward and away from the opposing first transfer rotator, Transport on support Opposed respectively provided direction downstream side, can be pressed against the plastic sheet after fusing supported on opposite second transport rotary member, a pressing rotary member rotatable to transport direction, each press rotating member KakuToruchaku rotating body excluding the one end side of the transfer direction perpendicular in the synthetic resin sheet superimposed Rutotomoni and a second actuating member which moves each the direction approaching or separating from the respective second transfer rotary member, A plurality of notches are provided on the outer peripheral surface at minute intervals in the circumferential direction, and the fusion rotating body is pressed against one end side in the transfer orthogonal direction in the synthetic resin sheet transferred in a superimposed state. In the synthetic resin sheet in the direction perpendicular to the transfer direction, the non-fused portion is welded by pressing a fusion rotating body having a notch portion formed on the outer peripheral surface to the other end side. A notch is formed on the outer peripheral surface of the The most important feature is that each of the fused rotating bodies is selectively pressed and fused while providing a non-fused portion, thereby forming a common space portion and a plurality of air circulation portions communicating therewith. And

  In the present invention, even if the width of the synthetic resin sheet in the direction perpendicular to the transfer direction is long, two synthetic resin sheets stacked with a simple structure are fused by providing a plurality of air circulation portions in the center. Thus, the heat insulating sheet can be efficiently manufactured. In addition, the transfer mechanism can also be configured to serve as a fusion member, so that the structure of the apparatus itself can be simplified and the cost can be reduced. Furthermore, the laminated synthetic resin sheets can be fused at narrow intervals.

It is a partially broken perspective view which shows the outline of the heat retention sheet | seat for agriculture. It is a perspective view which shows the outline of a synthetic resin sheet melt | fusion apparatus. It is an expansion perspective view which shows a melt | fusion part. It is explanatory drawing which shows the movement state of a fusion | melting rotary body and a press rotary body. It is explanatory drawing which shows the movement state of a fusion | melting rotary body and a press rotary body at the time of a melt | fusion. It is explanatory drawing which shows the state which fuse | melts a synthetic resin sheet, providing a non-fusion part between air circulation parts. It is explanatory drawing which shows the non-fusion | fusion part in the fusion | melting part between air circulation parts.

  The present invention selectively presses each fusion rotator against a synthetic resin sheet transferred in a superposed state, and fuses appropriate portions of both end sides and an intermediate portion in the transfer orthogonal direction to air inside. A distribution part can be formed.

  A fusing device for fusing at least two synthetic resin sheets when producing a heat insulation sheet for use in an agricultural house according to FIGS. 1 to 6 showing an embodiment of the present invention will be described below.

  As shown in FIG. 2, the heat insulation sheet 1 according to the present invention is attached so as to cover the entire side surface of an agricultural house (not shown) such as a vinyl house or a glass greenhouse, and is supplied by the air in the house sent into the interior. Used in applications where heat is shielded from outside air and kept at a constant temperature. The heat-insulating sheet 1 has a plurality of stages of air circulation portions 7 in which at least two synthetic resin sheets 3 and 5 are internally extended in a plurality of stages in the vertical direction and in the horizontal direction and into which air in the house is sent. It is formed by fusing. In addition, in one end portion in the longitudinal direction of the heat insulating sheet 1, a common space portion 8 is provided in which the two synthetic resin sheets 3 and 5 are not fused and communicated with the air circulation portions 7.

The synthetic resin sheets 3 and 5 are blended mainly containing at least one of polyethylene resin, ethylene-vinyl acetate copolymer resin, ethylene-α olefin copolymer resin, etc., and have heat retention, translucency, and dust resistance. It has excellent properties such as properties, antifogging properties, strength, weather resistance and durability. And the synthetic resin sheet 3 arranged on the outside is made of air-impermeable and the synthetic resin sheet 5 arranged on the inside is formed with a large number of fine holes as shown in, for example, JP-A-2007-89493, for example, Air permeability is 500 (g / m 2, 24 hr) or more. The two synthetic resin sheets 3 and 5 may be non-moisture permeable.

As shown in FIGS. 1 and 3, at least the axial width of the synthetic resin sheet fusion apparatus 9 used to manufacture the heat insulation sheet 1 is at least the axial width from the side height of the agricultural house described above. The sheet rolls 13 and 15 on which the respective synthetic resin sheets 3 and 5 are wound are arranged so as to be exchangeable, and the synthetic resin sheets 3 and 5 fed out from the sheet rolls 13 and 15 are respectively connected to the sheet rolls 13 and 15. A pair of upper and lower turning rolls 17 a and 17 b arranged close to each other with an axis in the matching direction are overlapped and transferred to the front of the main body frame 11.

At the fusion position of the main body frame 11, a plurality of support members 19 are fixed at predetermined intervals in the transport orthogonal direction. The predetermined interval is set according to the mutual interval between the both end portions of the synthetic resin sheets 3 and 5 in the direction perpendicular to the transfer direction and the air circulation portions 7 formed on the heat insulating sheet 1. A first transfer rotator 21 is supported on the upper side of each support member 19 in the transfer direction, and a second transfer rotator 23 is supported on the lower side of the transfer direction so as to rotate in the transfer direction. Yes.

Rotating bodies 21a and 23a such as sprockets and toothed pulleys having the same diameter are fixed to the rotating shafts of the first and second transfer rotating bodies 21 and 23, respectively. In addition, a drive shaft 25 having an axis in the direction perpendicular to the transport is rotatably supported by the main body frame 11 positioned below each support member 19, and the drive shaft 25 is connected to an electric motor (not shown). ), The first and second transfer rotators 21 and 23 are rotationally driven to rotate in the transfer direction. The electric motor is equipped with a rotary position detector (not shown) such as a rotary encoder or a tachometer, and the electric signal output from the rotary position detector is counted by a counter circuit or the like. Open loop control.

A drive rotating body 25a such as a sprocket and a toothed pulley is fixed to the drive shaft 25 corresponding to each of the rotating bodies 21a and 23a. The drive rotating body 25a and the rotating bodies 21a and 23a have a chain and a timing belt. A power transmission member 29 such as the like is suspended. Each of these rotating bodies 21a and 23a is rotated in the transfer direction as the drive shaft 25 rotates.

A mounting bar 31 extending in the direction perpendicular to the transport is fixed to the main body frame 11 corresponding to the upper side of each of the first and second transport rotators 21, 23, and a plurality of mounting members 33 are attached to the mounting bar 31. Are fixed in conformity with the respective support members 19.

A first actuating member 35 such as an air cylinder having a substantially vertical axis is provided on the upper side of each mounting member 33 in the transfer direction, and an air cylinder having a substantially vertical axis on the lower side of the transfer direction. The second actuating members 37 are fixed. A shaft support member 35b is fixed to the operation rod 35a of each first operation member 35, and a fusion rotator 39 is supported by the shaft support member 35b so as to be rotatable in the transfer direction.

Further, a shaft support member 37b is fixed to the operation rod 37a of each second operation member 37, and a pressing rotator 41 is supported on the shaft support member 37b so as to be rotatable in the transfer direction. . An electric heater 43 as a heating member is attached to both ends of each fusing rotator 39 in the axial direction, and the fusing rotator 39 is heated to a temperature at which the synthetic resin sheets 3 and 5 are melted and fused. Let In addition, a plurality of notches 39a are formed in the circumferential direction at minute intervals on a partial circumferential surface of each fusion rotator 39 excluding the fusion rotator 39 on one end side in the transfer orthogonal direction. ing.

The fusion rotator 39 is reciprocated in a direction in which it comes into contact with and separates from the upper outer peripheral surface of the first transfer rotator 21 opposed by the operation of the first operating member 35. Similarly, the pressing rotator 41 is reciprocated in the direction of coming into contact with and separating from the upper outer peripheral surface of the opposing second transfer rotator 23 by the operation of the second operating member 37.

A winding roll 45 having an axis in the direction perpendicular to the transfer is rotatably supported at the front portion of the main body frame 11, and an electric motor (not shown) is connected to the winding roll 45. The take-up roll 45 rotates at a rotational speed substantially equal to or slightly faster than the transfer speed by the first and second transfer rotating bodies 21 and 23 as the electric motor is driven. The continuous heat-insulating sheet 1 is wound up. Note that a base end portion of the upper outer peripheral surface of the take-up roll 45 is swingable to the mounting bar 31 at an appropriate interval with respect to the direction perpendicular to the transfer, and an elastic member (not shown) such as a coil spring. The fused rotating synthetic resin sheet is provided so that the driven rotating body 51 rotatably supported by the distal end portion of the arm 49 supported in a state of being urged by each of the arm 49 is wound around the winding roll 45. It is configured to maintain a winding posture of 3.5.

In addition, as a structure which arrange | positions a fixed length cutting device (not shown) ahead of the main body frame 11, and cuts the continuous heat insulation sheet | seat 1 fuse | fused in the overlapped state for every predetermined transfer length. Also good. Further, the winding roll 45 described above may be configured to be rotated by a driving force from an electric motor that rotationally drives the drive shaft 25.

Next, the fusing action of the synthetic resin sheets 3 and 5 by the synthetic resin sheet fusing apparatus 9 configured as described above will be described.
First, the synthetic resin sheets 3 and 5 fed out from the sheet rolls 13 and 15 are turned by the turning rolls 17a and 17b so that the leading end side is positioned between the support rotating body 45 and the driven rotating body 49. To do.

Next, the second actuating member 37 is actuated in a state where the electric motor is driven to rotate and the first and second transfer rotators 21 and 23 are rotated in the transfer direction, and the pressing rotator 41 is moved to the first. (2) The synthetic resin sheets 3 and 5 are moved toward the front of the main body frame 11 by moving toward the transfer rotator 23 and sandwiching the overlapped synthetic resin sheets 3 and 5 positioned therebetween. Moreover, the synthetic resin sheet 3.5 which is moved by operating the first actuating member 35 located at both ends in the transfer orthogonal direction and moving the fusing rotator 39 toward the first transfer rotator 21 together with the operation. Are pressed against both sides in the direction perpendicular to the transfer direction. (See Figure 4)

The superposed synthetic resin sheets 3 and 5 thus transferred are fused and integrated by the fusion rotating body 39 that is in pressure contact with both ends in the direction perpendicular to the transfer. In addition, since the notch part 39a is formed in one fusion | melting rotary body 39 among the fusion | melting rotary bodies 39 located in the both-ends side of a transfer orthogonal direction, the synthetic resin sheet corresponding to this fusion rotary body 39 is formed. A part of the third and fifth fused portions is not fused by the notch 39a and is in a state of communicating with the inside.

In the fused state, the remaining first operating member 35 is actuated at the timing when the synthetic resin sheets 3 and 5 are moved by the length of the common space 8 in the transfer direction, and the fusing rotator 39 is first transferred and rotated. The air circulation part 7 is formed in the intermediate part of the synthetic resin sheets 3 and 5 by being pressed and fused to the synthetic resin sheets 3 and 5 that are moved toward the body 21 and transferred. The timing is determined when the electric signal from the rotational position detector is counted and the count value reaches a preset count value.

At that time, since the notch 39a is provided in the fusion rotator 39 that is in pressure contact with the intermediate portion of the synthetic resin sheets 3 and 5 to be transferred, as shown in FIG. 6 and FIG. A non-fused portion corresponding to the notch 39a is formed at a fusion position located between the two. These non-fused portions allow adjacent air circulation portions 7 to communicate with each other. The non-fused portion forms a drainage portion for discharging condensed water accumulated by condensation of moisture contained in the air remaining in the air circulation portion 7 as it is cooled by the outside air. In addition, the synthetic resin sheets 3 and 5 after being fused by the fusion rotator 39 are made to have a predetermined thickness by being pressed by the second transfer rotator 23 and the pressing rotator 41 at the fusion point. Cool and cure while shaping.

When the transport length of the synthetic resin sheets 3 and 5 reaches a length that matches the longitudinal direction of the heat insulating sheet 1 in the fused state, each first operation located at an intermediate portion excluding both ends in the transport orthogonal direction The member 35 is moved backward to be separated from the upper surfaces of the synthetic resin sheets 3 and 5 to which the fusion rotating body 39 is transferred, and both ends in the transfer orthogonal direction are fused while the intermediate portion is not fused.

Then, in the same manner as described above, at the timing when the synthetic resin sheets 3 and 5 are transferred by the length of the common space portion 8 in the transfer direction, the respective first operation members 35 corresponding to the intermediate portions are operated again to perform fusion rotation. The body 39 is moved toward the first transfer rotator 21, pressed against the intermediate portion of the transferred synthetic resin sheet 3, 5 and fused, and the next heat insulating sheet 1 is continuously manufactured.
And the continuous heat insulation sheet | seat 1 fuse | fused in the state piled up as mentioned above is wound up sequentially with the rotation of the winding roll 45. FIG. The wound synthetic resin sheets 3 and 5 are cut and formed on the heat insulating sheet 1 while the transfer direction is welded every predetermined length.

In the present embodiment, the plurality of fusing rotators 39 arranged in the direction orthogonal to the transfer of the synthetic resin sheets 3 and 5 are selectively moved and fused to the first transfer rotator 21 side to transfer in the direction orthogonal to the transfer. The heat insulation sheet 1 can be manufactured by fusing both ends of the sheet and sealing the middle part and fusing the intermediate part to provide the air circulation part 7 and the common space part 8, and using a high-frequency heating device as a fusing mechanism. Compared to the conventional fusion apparatus, the apparatus itself can be simplified and the cost can be reduced.

In addition, two synthetic resin sheets 3 that are superposed while providing a non-fused portion as a drainage portion that discharges the condensed water accumulated in the air in each air circulation portion 7 by condensation from outside air. -The middle part of 5 can be fused efficiently.

DESCRIPTION OF SYMBOLS 1 Heat insulation sheet 3 * 5 Synthetic resin sheet 7 Air distribution part 8 Common space part 9 Synthetic resin sheet fusion | fusion apparatus 11 Main body frame 13 * 15 Sheet roll 17a * 17b Turning roll 19 Support member 21 1st transfer rotary body 23 2nd transfer Rotating body 21a / 23a Rotating body 25 Drive shaft 25a Driving rotator 29 Power transmission member 31 Mounting bar 33 Mounting member 35 First operating member 35a Operating rod 37 Second operating member 37a Operating rod 39 Fusing rotating body 39a Notch 41 Press rotator 43 Electric heater 45 Support rotator 49 Arm 51 Driven rotator

Claims (1)

At least two synthetic resin sheets that are superposed at a predetermined interval in the direction perpendicular to the transfer direction of the at least two superposed synthetic resin sheets constituting the heat insulation sheet for agriculture and rotated in the transfer direction, respectively. A plurality of first and second transfer rotors to be transferred;
Rotation drive means for synchronizing the first and second transfer rotators in the transfer direction,
Each of the plurality of supports disposed above the first and second transfer rotators is provided on the upper side in the transfer direction and is pressed against the synthetic resin sheet supported on the first transfer rotator facing each other. A fusion rotating body that rotates in the transfer direction;
A heating member for heating each fusion rotating body,
A first actuating member that moves in the direction of contacting and separating each fusion rotating body relative to the first transfer rotating body facing each other;
A pressing rotator that is provided on the lower side in the transfer direction in each of the supports and can be pressed against the fused synthetic resin sheet supported on the opposing second transfer rotator, and can be rotated in the transfer direction;
A second actuating member that moves in a direction in which each pressing rotator contacts and separates from each opposing second transfer rotator, and
The equipped Rutotomoni,
Each fusion rotator excluding the one end side in the direction perpendicular to the transfer direction in the laminated synthetic resin sheet is provided with a plurality of notches on the outer peripheral surface at minute intervals in the circumferential direction,
In the synthetic resin sheet transported in an overlapped state, a fusion rotating body is pressed and fused to one end side in the transport orthogonal direction , and a notch is formed on the outer peripheral surface to the other end side. Each fusion rotator in which a notch portion is formed on the outer peripheral surface with respect to the intermediate portion of the synthetic resin sheet in the direction perpendicular to the transfer direction while being fused by pressing the fusion rotator to provide a non-fused portion. A synthetic resin sheet fusion apparatus for agricultural heat insulation sheets, which is selectively welded and fused while providing a non-fused portion to form a common space portion and a plurality of air circulation portions communicating therewith .

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