JPS6360855A - Sheet tension adjustor for sheet jointing machine - Google Patents

Abstract

PURPOSE:To suppress the nonuniformity in revolution of the original sheet by detecting the variation of tension of the sheet pulled and transferred by a driving means as the swing quantity of a swing mechanism and revolution- driving a driving motor according to the detection signal for the magnitude of the swing quantity. CONSTITUTION:Each sheet S1-S3 of each sheet original cloth 6a-6c is wound onto the dancer roll 11B of a swing mechanism 11 from below to above, and inserted between the upper and lower electrode rollers 19 and 20 and between a driving means 18 and a pressing roller 28. Further, the sheet S4 of a sheet original cloth 30 for joint is inserted similarly between the electrode rollers 19 and 20. Then, each sheet S1-S4 is pulled out by driving a driving means 18, and the side edge of each sheet S>=1-S3 and the sheet S4 for joint are high-frequency-welded by the electrode rollers 19 and 20. At this time, the swing quantity of a swing mechanism 11 which is swung according to the tension of each sheet S1-S3 is detected by a detecting means, and a driving motor 9 is controlled according to the result of the detection, and the original-cloth supporting roller 4 of a driving-out mechanism 2 is driven through a power transmission mechanism 10.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a sheet tension adjustment device for a sheet joining machine, and more specifically, a sheet tension adjustment device for a synthetic resin sheet joining machine used in a synthetic resin house for greenhouse cultivation. This invention relates to a tension adjustment device.

(Prior Art) Conventionally, in this type of sheet joining machine, a plurality of sheet originals are supported in parallel at appropriate intervals on the side of a feeding mechanism disposed opposite to the main body of the joining machine. is fed out by a feeding roller built into the welding machine main body, that is, a driving means that pulls and moves the sheet in the feeding direction, and adjacent side edges of the sheet are welded together using high frequency welding using an electrode roller.

(Problems to be Solved by the Invention) However, in the conventional splicing machine, the feeding of the sheet from the original sheet depends only on the sheet tensile force produced by the drive means built into the splicing machine main body. The tension of the sheet fluctuates due to uneven rotation of the sheet material due to inertia during sheet feeding, slight deflection of the sheet material support shaft and the feeding roller constituting the driving means, slight unevenness of rotation occurring in the driving means, and the like.

These variations in sheet tension can impair the proper bonding of adjacent side edges of each sheet and reduce the quality of the bonded sheets.

The present invention has been made in order to solve the problems of the prior art, and is a sheet joining method that can maintain the tension of the sheet unrolled from the original sheet at all times and realize a suitable joining. An object of the present invention is to provide a sheet tension adjustment device for a machine.

(Means for Solving the Problems) A sheet tension adjustment device in a sheet joining machine according to the present invention is incorporated into the main body of the joining machine and tensions the sheet fed out from the sheet material wound into a roll in the feeding direction. It has a driving means for moving, is disposed opposite to the main body of the joining machine, and is rotatably supported in parallel with a required interval, and
a feeding mechanism equipped with a pair of fabric support rollers that support a sheet fabric and rotate it in a feeding direction by frictional force;
a drive motor that rotates in synchronization with the drive means and rotationally drives the feed mechanism in the feed direction via a power transmission mechanism; and a sheet that is wound around a sheet fed from a sheet original roll and is pulled and moved by the drive means. A swinging mechanism that swings according to the tension of the swinging mechanism, a swinging mechanism that detects the amount of swinging of this swinging mechanism, converts it into an electric signal and outputs it, and drives the drive motor at a speed that corresponds to the size of the signal. It is equipped with a tension detection control means for rotating.

(Function) In the present invention, the swinging mechanism swings by the tension of the sheet pulled by the drive means built into the welding machine main body,
The magnitude of the amount of displacement, that is, the magnitude of the tension in the sheet, is detected by the tension detection control means and converted into an electric signal to rotate the drive motor, and the unwinding mechanism is operated via the power transmission mechanism to unwind the original sheet. Drive rotation in the direction.

(Embodiment) Fig. 1 is a perspective view of a sheet joining machine to which an embodiment of the present invention is applied, and Fig. 2 is a right side view of the same. In these figures, 1 is the main body of the joining machine, and its machine frame IA A plurality of feeding mechanisms 2 are disposed facing each other in front of (on the near side in FIG. 1 and on the left side in FIG. 2).

Each feeding mechanism 2 includes a trolley 3, a pair of original fabric support rollers 4, 4, which are parallel and rotatably supported at a required distance from each other on the carriage 3F, and an original fabric support roller attached to the carriage 3. The vinyl sheet material 8a, fib, Bc wound into a roll has a pair of forks 5, 5 protruding upward from the opposing gap between the two, and both ends of the support shaft 7 are connected to the fork 5. , 5 rotatably clamps the original fabric support roller 4.
,4. It will be placed on Jm.

The drive motor 9 is mounted on one end of the cart 3, and is connected to the original fabric support roller 4 of the feeding mechanism 2 via the power transmission mechanism 10.
4 is rotated in the feeding direction (arrow A) of the original sheets 6a, 8b, and Be. That is, the power transmission mechanism 10 includes a sprocket (
(not shown) and the roller shaft 4a of one of the original fabric support rollers 4
The first endless chain IOA is hooked up to a sprocket (not shown) fixed to the sprocket (not shown) fixed to the roller shafts 4al and 4a2 of both web support rollers 4 and 4, respectively. The chain is constituted by the passed second endless chain IOB.

Therefore, when the drive motor 9 is rotationally driven, the web support rollers 4, 4 rotate in the same direction, and the sheet webs 8a, 8b, Be are rotated in the feeding direction shown by arrow A due to frictional force.

As shown in FIGS. 3 and 4, the swinging mechanism 11 is mounted at both ends of the truck 3, with its central portion pivoted to the truck 3 via a support shaft 11 [1] in the front-rear direction (see FIG. 2). horizontal direction)
Swinging arms IIA, IIA extending from one end of these swinging arms IIA, IIA, a dancer roll LLB rotatably bridged to one end of these swinging arms IIA, IIA, that is, the left end in FIG. , that is, the balance way (IIC), which has been added to the right end of FIG. ing.

In this embodiment, the tension detection control means 12 includes a Hall IC fixed to the trolley 3 corresponding to the magnet 11E of the swing mechanism 11, and is configured to control the magnitude of the swing amount of the swing mechanism 11, that is, the proximity and separation of the magnet 11E. The amount is converted into an electrical signal and output, and the drive motor 8 is rotated at a speed corresponding to the magnitude of the signal.

That is, the larger the amount of rocking of the rocking mechanism 11, the faster the drive motor 9 is rotated.

The cutter device 13 includes a swinging rod 13a which has an abbreviated shape and is rotatably attached to the trolley 2 at the intersection of an upward arm and a sideward arm, and a rotary cutter attached to the upper end of the arm of the swinging rod 13a. Blade 13b and this rotating cutter blade 13
The roller 13c moved to the side of b and the rotating cutter blade 1
3b, and a weight 13e provided on the sideways arm of the swinging rod 13a, and the weight 13e is slidable along a long hole 13f bored in the sideways arm of the swinging rod 13a. The pressing force of the cutter blade 13b against the original fabrics 6a to 8c can be increased or decreased depending on the fixed position of the single weight 13e, and the outer peripheral surface of the roller 13c is closer to the vinyl sheets S1 to S1 than the cutting edge of the cutter blade 13b. It is set at a position that is set back by a distance corresponding to the thickness of the - sheet of S.

A plurality of brackets 14 are installed on the machine frame IA for each raw material Eta-8.
These brackets 1 are arranged in parallel between the ends of c.
A support arm 15 is attached to each of the support arms 4 so as to be able to be raised and lowered about the support shaft 1B. A guide roller 17 is rotatably installed at each tip of these support arms 15.
The support arm 15 is cantilever-supported by the bracket 14 in the inverted state. At this time, as is clear from FIG.
The support arm 15 is located at a predetermined position above the
When erected, it abuts against the machine frame IA and is held slightly tilted backward, and at this time, the guide roller 17 is positioned diagonally above the rear side of the rear truck 3.

Further, a driving means 18 is provided at the top of the machine frame IA. The driving means 18 is constituted by a feeding roller, which is rotationally driven in the direction of arrow B in FIG. 2 by a feeding roller drive motor (not shown). 19.20 is the aforementioned guide roller 1
7 and the drive means 18 are upper and lower electrode rollers. These electrode rollers 19 and 20 are provided oppositely on both sides of a through hole 21a of a guide plate 21 provided in an inclined manner on the upper part of the machine frame IA, and are rotated in synchronization by a command signal from a tuner 22, so that both electrode rollers 19 and 20 The vinyl sheets S1.22 and Sl passing between the electrode rollers 19 and 20 are heated to a thermal welding temperature. Further, the upper electrode roller 18 is moved to the lower electrode roller 20 by the pressing force adjustment mechanism 23.
pressed to the side.

Further, a cutting device 2124 is provided on the machine frame IA. This cutting device 24 is a self-propelled type that reciprocates in the width direction of the vinyl sheet without lateral vibration along a pair of upper and lower rails 24a and 24b provided behind the drive means 8. Wheel 24c guided by 24b
, 24d, a rotating cutting blade 24e, and a cutting drive motor 24f.
and a traveling drive motor 24g, a traveling wheel 24h, and a trolley duct I/24i for power supply to both motors 24f and 24g.
It consists of.

25 is a vinyl sheet folding device provided at the rear of the machine frame IA. This folding device 25 has a plurality of endless bells (25c) between a rotating shaft 25a attached to the machine frame IA and a rotating shaft 25b arranged parallel to the rotating shaft 25a at a predetermined distance. A connecting arm 25d connects both rotating shafts 25a and 25b.
and a crank arm 25e provided on the machine frame IA are connected by a connecting rod 25'', and as the crank arm 25e rotates once in the direction of arrow C in FIG.
The structure is such that it can be reciprocated back and forth as shown by the arrows in the figure. Furthermore, a beam member 26 extending laterally is provided on the -L side of the machine frame IA, and a presser roller 28 is attached to the free end of a support arm 27 whose one end is pivotally connected to the beam member 2B.
is attached, and the pressing roller 28 presses the vinyl sheet against the aforementioned driving means 18, so that the vinyl sheet wrapped around the driving means 18 is sent rearward. Further, a support rod 29 extending on the opposite side of the support arm 27 is supported in a cantilever manner on the beam member 26, and a rolled vinyl sheet S) for joining is attached to the tip of the support rod 28. When the original fabric 30 is removed, this original fabric 30 is removed.
Vinyl Sea rolled out! -34 is guide pin 3
1 between both electrode rollers 19 and 20.

Next, the joining-L order of the vinyl sheets S1 to S] and the joining vinyl sheet S4 having the above configuration will be explained.

Grasp the ends of the sheets Sl-S of each of the raw vinyl sheets 8a, 8b, and Be, pull them out, wrap them around the dancer roll IIB of the rocking mechanism 11 from bottom to top, and then connect the upper electrode roller 19 and the lower electrode. It passes between the roller 20 and between the drive means 18 and the presser roller 2B.

In addition, the end of the bonding vinyl sheet S4 of the rolled original fabric 30 is grabbed and pulled out, and the sheet 1-94 is placed between the upper electrode roller 19 and the lower electrode roller 20 and between the drive means 18 and the presser roller 28. pass between.

Subsequently, when the driving means is rotated, the sheet S1
~S] and the joining sheet S4 are fed out.

Sea) By playing out S+ to S1, each seat 5
Tension is applied to l-s, and the swing mechanism 11 is swung by an amount of swing corresponding to the magnitude of this tension. That is, sheet S
, ~S3, the dancer roll IIB is lifted, and the swinging arm IIA swings about the support shaft 110. The amount of this swing increases as the tension of the (see) Sl to S] increases, that is, as the drive speed of the drive means 18 increases, the dancer roll IIB is lifted higher, and the swing angle of the support shaft +10 increases. growing.

Therefore, the magnet 11E fixed to the arm lIF attached to the support shaft 110 approaches or moves closer to the tension detection control means 12 depending on the magnitude of the swing amount. The tension detection control means 12 detects this close/separated state, that is, the amount of swing of the swing mechanism 11, converts it into an electrical signal, outputs it, and inputs it to the drive motor 8.

For this purpose, the drive motor 8 rotates at a speed that corresponds to the magnitude of the input signal value, that is, the rotational speed of the drive means 18, and drives the web support rollers 4, 4 of the feeding mechanism 2 through the power transmission mechanism IO. Drive rotation.

For this purpose, the sheet material 6a, 8b is moved by frictional force.
.

The speed at which 6c is rotated in the feeding direction shown by arrow A is:
Seats 81 to S1 are accelerated and decelerated in accordance with fluctuations in the tension of the sheets St to S, and as a result, the tension of the sheets 81 to S1 is always kept constant.

The motor 13d of the cutter device 13 is rotated at the same level as the sheet Sl-S□ is fed out, and the sheet S is fed out.
The side edges of 1 to S□ are cut, and the adjacent side edges of S1-S1 are aligned at a constant small interval. In addition, the tuner 22
, both the electrode rollers 19 and 20 are rotated in synchronization, and the temperature of both the electrode rollers 19 and 20 is controlled, and the sheet S passing between the electrode rollers 19 and 20 is
The side edges of 1 to S3 and the joining seam S4 are welded by high frequency.

The vinyl sheets 51 to S4 heat-welded by the electrode rollers 19 and 20 are sent to a folding machine 25.

The endless belt 25C of this folding device 25 has both rotating shafts 2
5a and 28b rotate in synchronization with the speed at which the vinyl sheet is fed out, and the crank arm 25e
Since it is reciprocatingly oscillated by the rotation of the holder, the reciprocating oscillation causes the joined vinyl sheet S to be folded and the receiver to be delivered to the stand. And each vinyl sheet S1
~ When S3 is joined by a predetermined length, it is detected by a detection device (not shown) and both electrode rollers 19.20
The drive of the thermally welded portion, drive means 18, drive motor 9, etc. is stopped, and the cutting device 24 is driven to cut the joined vinyl sheets S with the cutter blade 24e.

In the above embodiment, the swing mechanism 11 is the swing arm 11A,
IIA, these swinging arms IIA, a dancer roll 11B rotatably bridged to one end of IIA, a balance weight 11C attached to the other end of swinging arms IIA and IIA, and a drive motor 9 side of the support shaft 11D. The arm IIF is fixed together and has a magnet 11E attached to its tip. However, the present invention is not limited to the above-mentioned embodiment, and various modifications may be made based on the scope of the claims. is possible. For example, a dancer roll is guided and supported so that it can move up and down, a balance weight is connected to the dancer roll via a rope wound around a fixed pulley, and tension detection control is applied to either the dancer roll or the balance weight. It may also be configured such that magnets corresponding to the means can be traded. Further, the tension detection control means 12 is not limited to the Hall IC, and it goes without saying that devices such as proximity switches, photoelectric switches, etc. that can extract the contact/separation state of members as electrical signals can be selectively used. Nor.

(Effects of the Invention) As explained above, according to the present invention, fluctuations in the tension of the sheet being pulled and moved by the drive means built into the welding machine body are taken as the amount of rocking of the rocking mechanism, and this amount of rocking is taken as the amount of rocking of the rocking mechanism. By detecting the size of the image, converting it into an electric signal and outputting it, and rotating the drive motor in accordance with this output signal value, the feeding mechanism is rotationally driven in the direction of feeding the original fabric via the power transmission mechanism. With this structure, uneven rotation of the original sheet does not occur due to inertia when the sheet is fed out. In addition, even if the tension of the sheet changes due to slight deflection of the sheet material support shaft and the roll shaft of the driving means, or uneven rotation of the driving means, this fluctuation can be immediately followed and the material can be Since the unrolling of the sheet can be adjusted, the tension of the sheet can be kept constant regardless of the unrolling speed. Therefore, suitable joining of the sheets is achieved, and a high quality joined sheet can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a sheet joining machine to which an embodiment of the present invention is applied, Fig. 2 is a right side view of the same, and Fig. 3 is an enlarged plan view showing the positional relationship between the swing mechanism and the tension detection control means. , FIG. 4 is a view taken along the line IV-IV in FIG. 3. ■... Main body of splicing machine 2... Feeding mechanism 4... Original fabric support rollers 8a, 13b, 8cm-- Original sheet fabric 9... Drive motor 10... Power transmission mechanism 11... Rocking Mechanism 12... Tension detection control means 18... Drive means Sl to S1... Sheet

Claims (1)

[Claims] (1) A driving means that is built into the splicing machine body and pulls and moves the sheet fed out from the rolled sheet material in the feeding direction, and a drive means that is disposed opposite to the splicing machine body and parallel to the splicing machine body with a required interval. and a feeding mechanism that is rotatably supported by a shaft and includes a pair of fabric support rollers that support the sheet fabric and rotate it in the feeding direction by frictional force, and a power transmission mechanism that rotates in synchronization with the driving means. a drive motor that rotationally drives the feeding mechanism in the feeding direction of the original sheet; and a oscillator that swings in response to the tension of the sheet around which the sheet fed from the original sheet is wound and pulled and moved by the driving means. and a tension detection control means that detects the magnitude of the amount of rocking of the rocking mechanism, converts it into an electrical signal, outputs it, and rotates the drive motor at a speed according to the magnitude of the signal. Sheet tension adjustment device for sheet joining machines.