JPH11137916A - Filter cloth for filter press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide filter cloth for a filter press whose filter cloth lower end bar can easily be fitted to the filter cloth lower end part to spread the filter cloth and cannot come off when in use and can easily be removed after use. SOLUTION: By laying the whole side ends 4a on both sides of a folded part that the filter cloth lower end part is folded in the filter cloth length direction over the both side ends of the filter cloth body to sew them together, a long sideways cylindrical part 4d for inserting a filter cloth lower end bar 8 thereinto is formed at the filter cloth lower end, and also unsewed areas 4b each having such width that the filter cloth lower end bar 8 is allowed to be put in and out are left in some parts of the end side in the width direction of the cylindrical part 4d of the folded part and the other part thereof is sewed to the filter cloth body to form a sewed area 4c.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter cloth for a filter press, in which a lower end of a filter cloth is inserted into a bag at the lower end of the filter cloth and stretched.

[0002]

2. Description of the Related Art In a filter cloth of a filter press described in JP-A-09-108509, a filter cloth tension rod is folded at the lower end of the filter cloth in the longitudinal direction of the filter cloth, and the entire width of the filter cloth is sewn. In addition, the upper part of the side end is not sewn, and the lower part is sewn to form a bag-shaped filter cloth tension rod storage part at the lower part of the folded part, and the unsewn part of the upper part of the side end is formed. A filter cloth tension rod is inserted from above to drop the filter cloth tension rod into the storage section.

[0003]

However, when dropping the filter cloth bar, both the size of the storage section and the diameter of the filter cloth rod drop opening provided on the upper part of the storage section are required when the filter cloth is sewn. The drawback is that the filter cloth bar can only be easily dropped into a filter cloth rod of the same diameter or smaller than that in use, and it cannot be replaced with a large diameter filter cloth rod. is there. Also, if the size of the storage section and the diameter of the opening are too small to insert the filter cloth tension rod with respect to the diameter of the filter cloth tension rod, the dropping operation takes time and trouble and is troublesome. Also, if the filter cloth bar is too small and light in diameter, it is not enough as a filter cloth weight even if it is easy to drop the filter cloth rod and pass it through. Is not enough, the filter cloth dropping rod may be replaced, but even in such a case, replacement is difficult. In addition, the length corresponding to both the portion that is not sewn to form an opening for inserting the filter cloth insertion rod and the part that is sewn to store the dropped filter cloth tension rod is provided at both ends. Because of the necessity, the folded portion of the filter cloth as a whole also has a drawback that it becomes wider. Therefore, an object of the present invention is to solve the above-mentioned problems, and it is possible to easily attach and attach a filter cloth bottom rod to a lower end of the filter cloth so that the filter cloth bottom rod does not come out during use and can be used. An object of the present invention is to provide a filter press filter cloth which can easily remove the lower end bar of the filter cloth later, can be replaced with a lower end rod of a different size, and can reduce the folding width.

[0004]

Means for Solving the Problems and Effects of the Invention In order to achieve the above object, the present invention is configured as follows.
According to the first aspect of the present invention, the filter cloth is sewn by overlapping all side edges of both sides of a folded portion obtained by folding the lower end of the filter cloth in the longitudinal direction of the filter cloth with the corresponding both ends of the filter cloth body. At the lower end of the fabric, a horizontally long filter cloth lower end rod insertion cylindrical part is formed, and the widthwise end of the cylindrical part of the folded part is
A filter press characterized by forming a sewn area by stitching the other part to the filter cloth body while leaving a non-sewn area which allows the lower end rod of the filter cloth to be taken in and out of a part of the end side. Provide a filter cloth for use. According to a second aspect of the present invention, the sewn area is disposed at a central portion of the tubular portion,
A first arrangement in which the non-sewn areas are arranged on both sides thereof
An aspect of the present invention provides a filter cloth for a filter press according to the aspect. According to a third aspect of the present invention, there is provided the first aspect in which the sewn areas and the non-sewn areas are alternately arranged so that the lower end of the filter cloth can be put in and out of any of the non-sewn areas. And a filter cloth for a filter press.

[0005] According to the above construction, the cylindrical portion for inserting the lower end of the filter cloth of the filter cloth can be opened by forming a non-sewn area in a portion other than the sewn area. It can be very easily inserted into the tubular part from the area. For this reason, the work time for attaching the filter cloth bottom rod to the filter cloth is reduced. Also, when removing the lower end of the filter cloth from the cylindrical portion, one end of the lower end of the filter cloth in the cylindrical portion may be removed from the non-sewn area, and then the lower end of the filter cloth may be pulled out from the cylindrical portion. The lower end bar can be easily taken out. Therefore, even when replacing the lower end of the filter cloth with a filter cloth having a different size, the lower end of the filter cloth can be easily replaced. Also,
Even when adjusting the tension of the filter cloth by changing the weight of the filter cloth bottom rod, the filter cloth bottom rod having a different weight can be easily replaced. In addition, the sewing of sewing all the side edges of both sides of the folded portion of the filter cloth to the corresponding side edge of the filter fabric body is performed without stopping the sewing in the middle of the entire length of the side edge, and then continuously sewn the side edge of the folded portion. Since the entire length is sewn, the sewing work is simplified. The sewn area is relatively short with respect to the entire width of the filter cloth, except for a non-sewn area having a width that allows the lower end rod of the filter cloth to be taken in and out of the end of the folded portion of the filter cloth. Since the width is sufficient, the sewing operation is simple and easy. In addition, the number of sewing operations is reduced for the entire filter cloth, which is extremely economical. Also, the folded width may be large enough to store and remove the lower end of the filter cloth,
It can be smaller than before. Further, if the sewn areas and the non-sewn areas are arranged alternately, the lower end of the filter cloth can be put in and out of any of the non-sewn areas.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments according to the present invention will be described below in detail with reference to the drawings. As a filter press filter cloth according to an embodiment of the present invention, FIGS. 1 to 5 show a filter cloth 4 to be hung on a filter plate 1 of a center-feed filter press. The filter cloth 4 is formed by overlapping all the side edges 4a, 4a on both sides of a folded portion obtained by folding the lower end of the filter cloth in the longitudinal direction of the filter cloth 4 on both side ends of the filter cloth main body and sewing. A pocket 4d is formed at the lower end of the cloth, which functions as an example of a horizontally long tubular part for inserting a lower end of a filter cloth rod. In addition, the widthwise end of the folded portion of the pocket 4d is filtered at a part of the end, leaving a non-sewn area 4b, 4b of a width that allows the lower end of the filter cloth 8 to be taken in and out. It is characterized in that a sewing area 4c is formed by sewing on a cloth body. FIG. 3 is an enlarged view obtained by cutting a lower part of the filter cloth 4 of FIG. When inserting the filter cloth bottom rod 8 into the pocket 4d of the filter cloth 4, as shown in FIG. 3, one end of the filter cloth bottom rod 8 is indicated by an arrow in the wide opening of the non-sewn area 4b of the pocket 4d. The lower end of the filter cloth rod 8 is pushed into the bag-like portion of the pocket 4d as it is. The hand end of the pushed filter cloth lower end rod 8 is pushed into the inside of the sewn side end 4a. As a result, the filter cloth 4 is stretched in the width direction by the weight of the filter cloth bottom rod 8. In addition, the structure of the filter cloth 4 and the method of detaching from the filter plate 1 are known. Further, a pair of upper handles 1e, 1e of the four handles 1e,..., 1e protruding to the side of the filter plate 1 slide on the side beams 2, 2.

[0007] At the upper end of the filter cloth 4, an upper bag portion 4h formed by sewing the entire width of the filter cloth is formed in the same manner as in the prior art, and a filter cloth hanging rod 7 is inserted into the upper bag portion 4h to remove the filter cloth 4. They are suspended and supported. Although the stock solution hole 4g of the filter cloth 4 is formed at a position corresponding to the center of the filter bed of the filter plate 1 in FIG. 1, it is not limited to this, and any part of the filter plate 1 corresponding to the filter bed may be used. May be located at The undiluted hole 4g of the filter cloth 4 may be formed in the frame of the filter plate 1 or at a position corresponding to the outside of the frame. The filter cloth 4 can be hung on a single filter plate or a double filter plate. The fabric of the filter cloth 4 is not particularly limited. In this embodiment, the undiluted solution hole 4 g
The filter plate 1 is formed integrally with a cylindrical filter cloth portion around the
The filter cloth which is constituted by integrally connecting the filter cloths 4 before and after the above with the cylindrical filter cloth portion is illustrated, but the present invention is not limited to the filter cloth having such a structure. And various other structures. As the lower end rod 8 of the filter cloth, a round rod made of polyvinyl chloride resin is often used, but a rod made of polypropylene resin or iron may be used.

Further, as an example of the relationship between the non-sewn area 4b and the sewn area 4c in the filter cloth 4 of the above embodiment, assuming that the ratio of the entire width of the filter cloth is 100, the left and right non-sewn areas 4b , 4b each have a width of about 38, and the middle sewing area 4c has a width of about 24.
That is, the non-sewn area 4b is made as wide as about three quarters of the entire width of the filter cloth, and is divided into two parts on the left and right. In this example, the sewing area 4c is provided in the middle, but is not limited to the middle.
It is provided in two parts on both sides in the middle, and the non-sewn area 4b is 3
It may be provided at two places. For example, as another embodiment of the present invention, as shown in FIGS. 6 (A) and 6 (B), if the sewn areas 4c and the non-sewn areas 4b are arranged alternately, any configuration is possible. The lower end bar 8 of the filter cloth can be taken in and out of the non-sewn area 4b. In the case of a filter cloth to be hung on a large filter plate, the lengths and arrangements of the non-sewn areas 4b and the sewn areas 4c are not limited to those in the example shown in FIG. Things can be adopted.

According to the above embodiment, the pockets 4d of the filter cloth 4 are provided with the non-sewn areas 4b, 4b on both sides of the sewn area 4c.
Is formed to allow a large opening, so that the lower end rod 8 of the filter cloth is moved from one of the non-sewn areas 4b to the pocket 4d.
It can be very easily inserted inside. For this reason, the work time for attaching the filter cloth bottom rod 8 to the filter cloth 4 is reduced. Also, when removing the lower end of the filter cloth 8 from the pocket 4d, after removing one end of the lower end of the filter cloth 8 in the pocket 4d from one of the non-sewn areas 4b, the lower end of the filter cloth 8 is removed from the pocket 4d. You just have to pull out from 4d,
The lower end rod 8 of the filter cloth can be easily taken out. Therefore, even when the filter cloth bottom rod 8 having a different size is replaced, the filter cloth bottom rod 8 can be easily replaced. Also, when adjusting the tension of the filter cloth 4 by changing the weight of the filter cloth bottom rod 8, the filter cloth bottom rod 8 having a different weight can be easily replaced. Also, all side edges 4 on both sides of the folded portion of the filter cloth 4
In the sewing of sewing the a and 4a to the side end of the filter cloth main body, the sewing operation is simplified because the entire side end is continuously sewn without stopping the sewing in the middle of the entire side end. The sewn area 4c sewn to the entire width of the filter cloth 4 except for the non-sewn area 4b having a width that allows the lower end rod 8 of the filter cloth to be put in and out of the end of the folded portion of the filter cloth 4. On the other hand, since a relatively short width is sufficient, the sewing operation is simple and easy. In addition, the number of sewing operations is reduced for the entire filter cloth, which is extremely economical. Also, the folded width of the filter cloth 4 constituting the pocket 4d may be large enough to accommodate the filter cloth lower end bar 8 and to put it in and out, and can be made smaller than before.

[Brief description of the drawings]

FIG. 1 is a front view of a filter cloth of a center feed type filter press which is a filter cloth for a filter press according to an embodiment of the present invention.

FIG. 2 is a central longitudinal sectional view of the filter cloth of FIG. 1;

FIG. 3 is an enlarged view obtained by cutting a lower part of the filter cloth of FIG. 1;

FIG. 4 is a side view of the filter cloth of FIG. 3;

FIG. 5 is a front view of the filter cloth of FIG. 1 hung on a filter plate of a center-feed filter press.

FIGS. 6A and 6B are a front view and a side view of a filter cloth of a center-feed filter press which is a filter press filter cloth according to another embodiment of the present invention.

[Explanation of symbols]

1 ... filter plate, 1e ... handle, 2 ... side beam, 4 ... filter cloth,
4a: side end, 4b: non-sewn area, 4c: sewn area,
4d: pocket, 4g: undiluted solution hole, 4h: upper bag, 7 ...
Filter cloth hanging rod, 8 ... Filter cloth bottom rod.

Claims (3)

[Claims] 1. A lower end of a filter cloth, wherein the lower end of the filter cloth is folded in the longitudinal direction of the filter cloth, and all side edges (4a) on both sides of the folded portion are overlapped and sewn to corresponding both ends of the filter cloth main body. A tubular portion (4d) for inserting the lower end of the filter cloth into a horizontally long filter cloth, and an end in the width direction of the cylindrical part (4d) of the folded part is partially attached to the lower end of the filter cloth (8d). A filter cloth for a filter press, characterized in that a non-sewn area (4b) which allows the insertion and removal of the filter cloth is sewn to the filter cloth body to form a sewn area (4c). 2. The filter cloth for a filter press according to claim 1, wherein said sewn area is arranged at a central portion of said tubular portion, and said non-sewn area is arranged on both sides thereof. 3. The filter for a filter press according to claim 1, wherein the sewn areas and the non-sewn areas are alternately arranged so that the lower end of the filter cloth can be taken in and out of any of the non-sewn areas. cloth.