JPS603843B2 - Manufacturing method of foldable semi-permeable membrane element - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a folded semi-transparent membrane element.

More specifically, the present invention superimposes a thin plate-like V supply liquid flow path baser on at least one side of a synthetic resin semi-permeable membrane to form a band-shaped body, and the band-shaped body is placed between a pair of substantially opposing folding blades. By supplying from one direction, it is continuously and gently folded in the longitudinal direction, and then moved in the other direction while gradually increasing the degree of folding. The obtained strips are then sequentially stored in a plurality of folded state holding boxes, cut into predetermined longitudinal dimensions, held in the final folded state in each of the holding boxes, and bonded. The present invention relates to a method for manufacturing a foldable semi-transparent membrane element, which comprises waiting for a curing agent to obtain a predetermined element. Precision furnace filtration method, ultra-furnace filtration method,
Reverse osmosis and the like are being widely put into practical use as a fluid pus separation treatment technology in fields such as separation, purification, concentration, water production, and industrial wastewater treatment.

There are basically four types of element types used for these membrane separations: tubular type, spiral wound type, hollow fiber type, and plate and frame type. The area) is different, generally 186-328〆/, 656〆/, and 920
It is said to be about 0〆/ and 492re/〆. and,
Depending on the object to be treated and the purpose of the treatment, such as the difficulty of the pus cleaning method to deal with membrane contamination and the accuracy of pretreatment, the various types of devices listed above are selected and used as appropriate, and among them, the spiral wound type is currently the most commonly used. As is well known. but,
Due to its structure, once the membrane surface of a spiral wound type element becomes contaminated, it is currently impossible to use any method other than chemical cleaning using chemicals. The present inventor made various studies to improve this drawback, and first proposed a new foldable (pleated) type membrane separation element that can clean the purulent surface (No. Furthermore, we have now succeeded in developing a new industrial manufacturing method.

In other words, the foldable membrane separation element has, for example, a strip-shaped semi-permeable membrane made of synthetic resin that is folded in the longitudinal direction to form a plurality of rows of supply liquid flow channels on the front side and a plurality of rows of permeate flow channels on the back side. A substrate (plate) is inserted in each feed liquid flow path, and a lining fabric is placed along at least the edge portions of both ends of the membrane surface of each permeate flow path, so that only the edges of both ends are covered with liquid. Basically, it has a tightly bonded structure.

Furthermore, to this element, for example, a perforated plate that abuts and supports the closed surface of the permeate flow path is attached with a collection channel section that serves as a partition wall, and both end surfaces of the collection channel section and the element are attached. A case that is open and covers the outer circumferential surface is detachably attached to form a module, which is inserted internally into a pressure-resistant cylindrical tube and used for separation and concentration as appropriate. The main purpose of the present invention is to specifically propose an industrially suitable manufacturing method for this type of foldable separation element.

One of the main features of the method of the present invention is that the strip of semipermeable membrane and smoother is folded while increasing the degree of folding in the longitudinal direction. Damage to the semipermeable membrane that occurs can be reduced,
Another feature is that adhesive is supplied to both edges of the permeate flow path during folding, and therefore, adhesive can be applied to areas where adhesive is not required during folding, that is, to the cutting area. Since the supply of adhesive can be stopped, the cutting point can be set accurately.

In other words, if you set a cutting part that does not require the application of adhesive before folding the strip, and then apply adhesive to other parts and then fold it, the cut part will be misaligned and will not come to the specified position. There are three problems that can be raised. A series of folded bodies obtained as described above is stored in a plurality of different folded state holding boxes,
In addition, the membranes are cut into a certain longitudinal dimension and held in a folded state in each holding box 3 to cure the adhesive, thereby creating a permeate flow path with uniform gaps between the folded permeable membranes. In addition to being able to partition liquid-tightly, highly reliable elements can be manufactured continuously.

It is also possible to apply adhesive to the edges of both ears after folding the strip, but since the folded permeable membranes are in close contact with each other, it is difficult to apply adhesive evenly between them. It is difficult to supply. Other features and advantages of the invention will become apparent from the description below.

Next, the outline of the manufacturing method of the foldable semi-transparent membrane element according to the present invention will be briefly explained using the specific example shown in FIG.

Note that this invention is not limited to this. First, the membrane with hair cloth (synthetic resin belt-shaped semi-permeable membrane with backing cloth attached) 1, the supply liquid flow path smoother 3, and the permeate flow path smoother lc are superimposed on the guide roll 2 by 0. ,
Furthermore, it is gently folded alternately in the longitudinal direction by a pair of folding blades 11a and 11b, and in the middle of the folding, an adhesive is supplied to both edge portions of the folded band-shaped polymer on the side of the permeate flow path by an adhesive supply device 8. .

On the other hand, a pilot (plate) 6 for forcibly moving the strip to the right at a constant speed (intermittent) is connected to the power cylinder 22 in the supply liquid flow path at position 41 at the tip of the strip.
and then engage the pilot 6 with the guide chain 23.

The tip of the strip thus reaches position 42 as the pilot 6 moves. Here, yet another pilot 6 is inserted into the feed liquid flow path at the end of the strip: position 41 (first
The figure shows this situation). Subsequently, the pilot 6 is pulled out from the supply liquid flow path by the power cylinder 40c. Further, the strip moves at a predetermined speed as the pilot 6 moves, and the pilot 6 reaches the position 42. The pilot 6 is thus pulled out by the power cylinder 40c, and the inside of the holding box 120 is almost filled with the band-shaped body. The strip is then cut by lowering the cutting blade 6'b'. At this time, the stopper 6'b is simultaneously lowered and inserted into the permeate flow path at the rear end of the divided strip on the right. Then press 2
2d operates to compress the strip, and the stripper 6'c is lowered to maintain its compressed state. By the way, the folded state holding box 120 that stores the compressed strip is detachably attached, and is moved to another storage location and left for a long time. Of course, at this time, a new empty holding box is installed to replace the compression box. Thus, once the adhesive has cured and the retainer box has been removed, a reliable element with uniformly spaced permeate channels is obtained. The method for manufacturing this element will be described in more detail below with reference to FIGS. 1 to 10.

First, in FIG. 1, a synthetic resin semi-permeable membrane 1 with a cloth lining is usually supplied as a wet membrane or a dry membrane, and is folded through a guide roll 2 with the membrane surface facing down and the lining cloth surface facing upward. supplied to the machine.

In this case, if the permeation capacity of the membrane with a cloth lining is greater than or equal to 2 days/day, it is desirable to further use a permeate channel smoother lc. It goes without saying that in the case of a self-supporting membrane without a backing fabric, a permeate channel smoother lc is also used. The folding machine was created by Karl Labovsky (K.
Most of the products manufactured by Arl.

Note that membrane surfaces such as semipermeable membranes or microporous membranes require delicate handling, and membranes with lined cloth, feed liquid channel smoother 3, permeate channel smoother LC, etc. have relatively low elasticity and rigidity. big. Therefore, like paper or cloth, it is possible to forcefully fold it into a practically accurate size and shape in one go, but it is likely to cause unfavorable results in terms of quality, such as membrane breakage at the hair part. By folding the folding hairs abruptly, ie, in stages rather than all at once, folding can be achieved without impairing the membrane quality. Furthermore, in this device Z, in order to fold into a practically uniform size and shape, the folding device 10 and the contact surface with the upper membrane of the push box 30, which contact the membrane material, are made into point contact, unlike normal surface contact. ing. In other words, the folding device 10 and the push-in box 30 have a structure in which the contact surface of the membrane 1 with cloth lining, especially the membrane surface, is a normal smooth plane, and plane-to-plane contact with friction occurs over the entire surface. Although it is normal, in this device Z, the membrane surfaces of the folding device 10, the push box 30, etc. are mainly used to reduce the friction area between the contact surfaces with the membrane surfaces of the folding device 10, the push box 30, etc. For example, the contact surface with the supply liquid channel smoother 3 may be lined with a dendritic material, or a group of diagonal lattice-like or many longitudinal thin grooves may be provided, and the protruding edges may be provided with burrs or burrs. Either the surface is made smooth to avoid any blemishes, or the surface is made to have a coarse satin finish and a small surface roughness value using an etching method or the like. This structure is designed to minimize the contact friction between the cloth-backed membrane and the supply liquid flow path smoother 3, so that the folding device 10 and the like, especially the wet type membrane, can be practically covered with water. This can prevent a phenomenon that would make the folding device 10 etc. inoperable. Furthermore, a multi-purpose pilot 6 and a pusher box 3 are provided to control the parallel movement of the folding membrane, control the number of folds, and ensure automatic operation of the thread.
0. The following adhesive supply by the side movement of the pair of upper and lower conveyors 7 near the entrance, the above-mentioned push box 30, and the friction in the latter half combine to produce a semi-transparent membrane molded body that is folded uniformly with high precision during folding. I was able to get Furthermore, since the point contact is configured, when the supply liquid flow path smoother 3 is not folded at the same time, scratches on the membrane surface due to surface contact are reduced to zero, and a high-quality folded membrane can be obtained. It has the characteristic of being For membrane folding, normal area contact type equipment can be used, but in the case of normal surface contact, dry membranes have relatively little effect on shape and quality, but wet membrane folding has relatively little effect on shape and quality. In this case, the contact friction becomes large and its influence is large. The form of the supplied pus material is often made by laminating and folding the cloth-lined membrane 1 and the supply liquid flow path smoother 3, as shown in FIG. Resin-processed tri-O cotton as lc, furnace paper,
There are various combinations such as a combination of sack cloth, plastic net, etc., a membrane with a lining fabric, or a single membrane without a lining fabric, and a plastic snet as the feed liquid flow path smoother 3.
Any combination may be used depending on the purpose. However, this supplied membrane material is No. 1, 5, 8, and 9A.
As illustrated in the enlarged view in the circle, in order to bond the folded selvedge green part, epoxy resin, polyurethane resin, silicone resin is supplied from the adhesive injection device 8 with the backing fabric surface or the surface to be bonded facing upward. A Fuji0 adhesive 9 such as the following is injected.
The above film material, which is folded with adhesive sealed in the twills of both ears,
The replaceable holding box 12 is moved while moving inside the push box 30. The operations from the folding device 10 to the push box 30 will be explained in more detail step by step using an embodiment shown in the drawings. First, a membrane with cloth lining (synthetic resin band-shaped semi-transparent membrane) 1
With the purulent side facing downward, insert the supply V supply liquid flow path base 3 (
In FIG. 1, from the left side, the band-shaped polymer superimposed on the synthetic resin band-shaped net (synthetic resin band-shaped net) is passed between a pair of upper and lower guide rolls 2, and folding blades 11a and 1 that face each other and operate alternately.
Insert the hair into the box 30 through the part 1b to the extent that it will not be pulled back to one side due to the effect of the operation of the folding device 10, first start the folding device 10 by hand, and push a plurality of hairs into the box 30 to the right. After pushing it in, it will continue to go into auto operation.

In other words, first of all, pilot 6 is already confirmed to be at position 41.
The pilot 6 is placed on the saddle 21 of the pilot guide device 20 and pushed straight up into a predetermined position by the operation of the pilot guide 22 and inserted.
Both ends of the are engaged with the guide chain 23, and then a sequence controller (not shown, hereinafter referred to as "controller") detects and transmits the state, and operates the adhesive supply device 8 only for a short period of time as described below. The comparer 7, which is mechanically interlocked with the stopping and folding device 10 and is disposed on the lower surface of the pusher box 30, or facing the upper surface if necessary, starts, and at the same time counts the number of hairs from the wall into which the pilot 6 has entered. is started by the controller, and detects that the operation of the adhesive supply device 8 has stopped by one hair;
After the transmission, in addition to the above-mentioned operations, it also operates in synchronization with the adhesive supply device 8 (these operations will be described in detail later). The guide device 20 is the pilot 6
The structure is such that the parallel movement of the folding membrane, the control of the number of hairs in a group, and the automatic operation of the entire system are enabled as described above.The main mechanism will be explained with reference to FIG.

For example, in the figure, the left and right (in Figure 1, the end perpendicular to the page, the front side of the page is the right side).

) a pair of guide chains 23 forming a nearly triangular loop.
Sprocket a is stretched between sprockets 25a and 25c, which are integrally connected by shafts 26a and 26c, and is guaranteed to move by the same size on both sides and at the same speed. The figure shows an example in which only the lower sprocket 25b is supported by shafts 26b separately on the left and right sides, and the left and right tensioners of the guide chain 23a are configured respectively. The guide chain 23 needs to correspond to at least two pilots 6 separately for the following reasons. That is, the above two pilots 6
Since it is necessary to move at different speeds while guaranteeing the above-mentioned parallel movement, in FIG. 25d and 25f are separately configured to provide the same effects as the guide chain 23a, and the sprocket 25e and shaft 26e are configured as a tensioner as described above. These shafts are mounted on drive shafts 28a and 28c through bearings 29a and 29b, respectively, and are connected to a chain 23c.
The drive device 2 is connected via the sprockets 27a, b, c.
The direction in which the pilot 6 should be sent by 8b, arrow 28
An example of a configuration in which the pilot 6 is driven in the direction d, compensates for the frictional resistance accompanying the movement of the pilot 6, and applies an extremely weak feeding force to the pilot 6 is shown.

It is easily understood that based on such a configuration, the pilot 6 engaged with the guide chain 23a (or b) is guaranteed to operate as described above. is the pie mentioned above.

The belt castle 43 is a position where the sheet 6 enters upward, and the belt castle 43 is forcibly fed by the conveyor 7 in conjunction with the folding device 10, and the belt castle 44 moves to follow the progress of the hair on the folding film. The band and position 42 conceptually indicate the position from which the pilot 6 exits downward. Next, other important parts omitted in FIG. 2 will be explained in detail in FIG. 3 and subsequent figures. As shown in FIG. 3, when the pilot 6 is at position 19i in FIG. 9F, the leaf 6a enters below the figure 1, the chatter 6d bites into the guide chain 23b, and the stepped portion 6c of the pilot 6 and the lower surface of the base 6b are A state in which the saddle 21 is supported and guided by the rails 24 is shown.

This state is the state immediately after the device Z is put into automatic operation as described above, and then the controller detects the position of the target object (in this case, the pilot 6 that has arrived at the above-mentioned steady position), such as a proximity switch or a limit switch. The position of the pilot 6 is detected by an element such as a switch, photocell, or air micro relay (hereinafter referred to as a "sensor"), and the operation of the adhesive supply device 8 is stopped by one hair feed, and this is done as follows. The above-mentioned operation is continued, and at the same time, the number of hairs to be fed is started to be counted, and the above-mentioned pilot 6 is The position where the base 6b of the pilot 6 is completely separated from the rail 24 of the saddle 21 with the guide chain 23b engaged with both ends at right angles to the plane of the paper in Figure 3 (rightward in Figure 1) is as follows. Detected by the sensor and transmitted by the controller, the saddle 21 is lowered to the lower end, the standby position, by the power cylinder 22. This operation is detected by another sensor and the automatic operation of the device is continued. During this time, as shown in the left half of FIG. 4, the hair is conveyed in conjunction with the belts 7a of the upper and lower conveyors 7.

The right half of the figure shows the pilot 6 passing through the same section, showing that at least the lower surface of the hair group is driven by the belt 7a of the conveyor 7 via the base 6b of the pilot 6. This means that at least the unillustrated drum of the lower conveyor 7 can be applied to the conveyor 7 by the size necessary for the base 6b to pass, and with a force that does not prevent the base 6b from passing.
The belt 7a can be compressed during operation and restored after passing, so that it can be moved up and down and pushed up from below with a suitable spring or the like, or the thickness direction allows the belt 7a to pass through the belt 7a. It is obvious that the object can be achieved by any configuration that can be selected, such as a configuration having elasticity (none of which is shown). Further, the conveyor 7 is driven synchronously with the folding device 10, and forcibly sends the hair group in the other direction to maintain the state of the hair group on the other side of the upper and lower folding blades 11a and 11b in a steady state. to ensure accuracy and smooth folding. From the above description, the mode of transport of the pilot 6 and the folded hair to the belt castle 43 will be understood (see FIGS. 2-4).

Next, at the belt castle 44, following the above-mentioned transfer to the front belt castle 43, it is naturally pushed together with the pilot 6 between the bottom plate 33 and the top plate 36 of the push box 30, as shown in the enlarged sectional view in the circle on the right side of FIG. The inner surfaces 37 of the bottom and husband plates 33 and 36 are designed so that the brush contact surfaces with the folded hair form the point contact as described above.

The folded portion of the hair is gradually folded more strongly at the band castle 44. In other words, the radius of the bending part gradually decreases, and since the material of the membrane is similar to known membranes, it is thought that it will allow a certain degree of cold flow and form hair without difficulty. It is. In addition,
In FIG. 5, a chain guard 35 with a rail is shown as an example (on the right end of the figure), which is connected to the guide chain 23,
This not only ensures the engagement of the catcher 6d of the pilot 6, but also protects the guide chain 23 from dust, prevents inconveniences caused by contact between the driver and the chain, and prevents the above-mentioned guide chain 2 of this device.
It is possible to prevent oil stains around 3.

The rail 34 receives the base 6b of the pilot 6 and maintains the engagement between the guide chain 23 and the catcher 6d, and allows the pilot 6 to move in parallel when it enters in a plane perpendicular to the longitudinal axis of the device at position 41. (See Figure 3). The pilot 6 has reached the position 42 where automatic operation can be continued as described above, the count of yields has reached the set value, and the replacement box 1
Each sensor detects that 20 is not in the system, and the operation of the device is automatically stopped based on the signal from the controller.

Here, the excess back formed between the start of the manual operation and the entry of the pilot 6 is manually removed, and the replacement box 120 is placed into the system, which is further detected by another sensor and sent by the controller. , furthermore, by an operation to start automatic operation (operation like pressing a push spade of "auto"), this device enters the automatic operation, and first, the pull-down device 4 is activated.
0 is activated.

Of course, the system of this device and the controller is designed so that the replacement box 120 can proceed to the next process continuously without requiring any operation such as pressing the button of the above-mentioned “Kawa Auto” while the device is in continuous operation. The position 4 can be
The engaging portion 6e of the pilot 6 that has reached the position 2 is engaged with a hook 40b provided on the saddle 40a of the pulling device 40 (see FIG. 8), and the engaging portion 6e of the pilot 6 is engaged with the hook 40b provided on the saddle 40a of the pulling device 40 (see FIG. 8). The power cylinder 40c overcomes this and is pulled down by the power cylinder 40c as shown in FIG.

Thus, to explain the process in which the lowered pilot 6 is then returned to the guide device 20, the pilot 6 is returned to the guide device 20.
The pilot 6 at No. 2 corresponds to the return device 45 (see FIG. 7), including its attitude (see FIGS. 1 and 7).

The pilot 6 moves intensively in the one direction along the inclination of the seat 45a and the seal 45b of the return device. In order to smooth the movement of the pilot 6 on the rail 45b, a pipelator (not shown) is applied to the seat 45a and the rail 46b to apply vibrations together with the seat 45a as necessary to reduce static friction. replacing it with friction,
Alternatively, an air flow (not shown) may be blown into at least the contact surface of the base 0b of the pilot 6 with the sheet 45a and the rail 45b, or a so-called roller conveyor may be used in which rollers are applied to the surface that causes friction. However, the pilot 6 may be sent in one direction. The pilot 6 is relatively long in a direction perpendicular to the direction (lateral direction), and it is not necessarily easy to maintain a posture perpendicular to the feeding direction. In order to solve this problem, it is advantageous to keep the above-mentioned feeding distance to the necessary minimum and allow the other preceding pilots 6 who are waiting in the above-mentioned correct posture to carry on.

Accordingly, the above-mentioned pilot 6 corresponds to the chain 23b and has been explained by way of example (see Figs. 3 to 6 and the detailed description thereof), but if the above-mentioned pilot 6 is called pilot B here, it is the predecessor of the chain 23b. And, or alternatively, the following pilot 6 can be said to be the pilot A corresponding to the chain 23a, so "the pilot 6 is cyclically arranged on the rail 45b as pilots A, B, A, B..." (Fig. 1). A large number of them can be arranged side by side (not shown) to achieve the above purpose.

The stopper 45c is something like a hook that is actuated by a spring or the like when the saddle 21 of the guide device 20 is not located on the extension of the overriding rule 45b, and prevents the pilot 6 from moving in one direction. Only when the saddle 21 reaches the position, it retreats downward from the blocking state and accepts only one pilot 6. Accepting only one pilot 6 is due to the selection of the dimensions and shape of the saddle 21. It will be easily understood that the scale is more limited by the following.

The saddle 21 (see FIG. 1) and the pulling device 40, especially its saddle 40a (see FIGS. 6 to 8), are constructed using long elements in the transverse direction, such as a single power cylinder 22, 40c.
(In such cases, it is usually configured as a centrally supported type), for example, when the power cylinder is moved up and down with the piston rod as the axis, it involves unnecessary turning movement. ) will be provided.

In addition, in FIG. 7, the saddle 40a can be tilted around the machine axis as shown by the imaginary line, but when it is in the normal position shown in FIG. 7 and FIG. The saddle 40a is guided by one side of the rail 38, and the saddle 40a is positioned horizontally so that the guide surface is aligned with the rail 34.

In addition, in the longitudinal cross-sectional diagrams of the folded hair-attached membrane body shown in Figure 7 and after, the upper opening valley is expressed as narrow in the middle, and the lower opening valley is expressed as middle wide in the above-mentioned upper opening valley. This shows that the adhesive 9 has been supplied and that the edges of both ears are almost in a bonded state. Here, we will go back a little and explain the first and second steps in detail. First, we will discuss the very standard formation of the above-mentioned yield. (Showa 52 of the above-mentioned applicant)
．． This corresponds to the method for manufacturing a "semi-transparent membrane molded article" for which a utility model registration application was filed on September 28.

) Folding by the first folding device 1 will be described in sequence with reference to the diagrams. This will be described with reference to FIGS. 9A to 9G.

Figure A schematically shows the main parts of the folding device 10, and since the upper and lower parts are symmetrical, the upper part is partially omitted, and the corresponding parts are indicated by the suffix a and b, respectively. They are distinguished on the drawing. With the folding blades 11a and 11b opened to some extent by a simple operation of the later-described drive device for the folding device 10, that is, in the state shown in FIG. The folding blades are superimposed in the posture and order as shown in the partial detail drawing in the circle of the same figure, and inserted between the upper and lower folding blades 11a and 11b, and the through length is inserted into the push box 30 as described above. It is activated manually or automatically and starts operating as shown in Figure 9B. In the figure, we will first explain the case in which the lower folding blade 11b operates, but this does not necessarily have to be the case, and each state of C to G in the figure is cyclically repeated, so for example, the same If you start the above process just before figure E, E~G will appear.
, C to O, and it is easy to understand that the operation starts from the upper folding blade 11a. Now, the folding blade 11b fixed to the guide slider 12b on the guide rail 13b moves as shown by an arrow 19c by the blade drive device described later, and then moves on the guide rail 13b as shown by an arrow 19c.
3b is tilted around the swing shaft 15b via the arm 14b to a position 49 by pushing the force follower 16b by the force arm 19b.

As a result, the folding blade 11b is further moved in the direction of the arrow 19e, and the upper green end of the folding blade 11b approaches one edge of the husband plate 36 of the push box 30, and the polymer is moved between the two edges. be held between. At this time, the spring 17b is compressed. It goes without saying that said cam 19b is rotationally driven by a camshaft 18b and moves in mechanical and/or other types of synchronization, e.g. electrically, as required with other parts of the folding device. Will. The upper folding blade 11a moves as shown by the arrow 19d in accordance with the original synchronized operation while the lower folding blade 11b moves as shown by the arrow 19c.

This can be interpreted as that the correlation between the movement of the folding blade 11b corresponding to the movement of the folding blade 11a shown in FIG. Subsequently, as shown in Figure C, the folding blade 11a descends as shown by an arrow 19f along the upper guide rail 13d, forming a crease in the polymer sandwiched between the upper edges of the folding blade 11b. urge

Next, as shown in FIG. D, the folding blade 11M retreats as shown by the arrow 19g, and then, as shown in FIG. Arrow 19 on guide rail 13a
With the displacement as indicated by i, the polymer is covered between the two twills near the lower edge of the folding blade 11a and one edge of the bottom plate 33 of the push box 30. Subsequently, the operations are performed in the same manner as shown in FIGS. 9F to 9F and then C to D, and the folded back assembly is applied with adhesive 9 by the adhesive supply device 8 described below at the position 42. Up to this point, the first step of producing one unit of the hair aggregate has been completed, but then the folding blade 11
A general method and the configuration of the device for vertically driving the guide rails 13a and 13b will be described.

As shown in FIG. 10, the folding blades 11a, b are connected to upper and lower blade bell cranks 51a, b by upper and lower blade connecting rods 58a, b, respectively, to upper and lower blade arms 52a, b, respectively. The cranks 51a, b are driven by the upper and lower blade cam followers 53a, b synchronously driven by the upper and lower blade cams 55a, b, so that the folding blades 11a, b
is capable of carrying out the above-described series of folding and feeding into the push box 30.

It is preferable that the upper and lower connecting rods 58a and 58b incorporate a microscrew device (not shown) to enable length adjustment. Further, the lower blade counterbalance 54b is connected to the center pin 57 of the lower blade bell crank 51b.
This is to measure the balance of the surroundings, and in the case of the upper blade bell crank 51a, the upper blade cam follower 53a also serves as this function, and is used to ensure quiet and reliable operation of this device. In the illustrated example, the means for maintaining contact between the upper and lower blade cam followers 53a, b and the upper and lower blade cams 55a, b is omitted, but around the center pin 57 of the upper and lower blade bell cranks 51a, b. Needless to say, other means such as a spring, a warp weight, a power cylinder, or a grooved cam (none of which are shown) may be used to maintain the above-mentioned contact by adjusting the balance.

In addition, in the example shown in FIG. 10, the upper and lower blade cams 55a, b are arranged on a common camshaft 56, but one
An upper blade cam 55a is placed on one of the two camshafts that interlock with each other, and a lower blade cam 55 is placed on the other camshaft.
It is also obvious that b can be placed.

[Brief explanation of drawings]

Fig. 1 is an explanatory view of the mechanism of an apparatus for carrying out the method for manufacturing a foldable semi-transparent membrane element according to the present invention, Fig. 2 is an explanatory view of the mechanism of the guide chain, and Figs. An explanatory diagram of the pilot's operation according to cross sections A-A, B-B, CC and ○1D in the figure. Figure 7 is at position 4 in Figure 1.
8 is an enlarged cross-sectional view of the section 41, FIG. 9 is an explanatory view of the state near position 41 in FIG. 1, and FIG. 10 is an explanatory view of the mechanism of the folding blade. Z... Foldable semi-transparent membrane element manufacturing equipment, 1
... Membrane with hair patch, 3 ... Supply v supply liquid channel smoother 8 ... Adhesive supply device, 10 ... Folding device, 1
1a, 11b...Folding blade, 120...Holding box. Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 8 Figure 7 (A) Figure 0 (B) Figure 0 (〇Figure 0 (D) Figure 0 (E) F in Aoi's diagram) Figure 0 (G) '0'

Claims (1)

[Claims] 1. A thin plate-like supply liquid flow path spacer is superimposed on at least one side of a synthetic resin semi-permeable membrane to form a strip, and the strip is fed from one direction between a pair of almost opposing folding blades. The belt is folded continuously and gently in one direction, and then moved in the other direction while gradually increasing the degree of folding. Furthermore, during the folding, an adhesive is supplied to both edges of the permeate flow path of the strip, and then The obtained strips are sequentially stored in a plurality of folded state holding boxes, cut into predetermined longitudinal dimensions, and held in the final folded state in each of the holding boxes to wait for the adhesive to harden before being attached to a predetermined element. A method for producing a foldable semi-permeable membrane element by obtaining a foldable semi-permeable membrane element.