JPS641995Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is a method of transporting a long piece of fabric in the form of a spread sheet, and blowing hot air onto the fabric to perform hot air treatments such as drying and heat fixation. This relates to a filter cleaning device for removing dust from circulating hot air in processing equipment, and is used in loop dryers, tenters, hot flues, baking machines, etc.

(Prior art) In a fabric hot air treatment device, a filter removes dust such as lint from the circulating hot air blown onto the fabric, and then the circulating hot air is reheated using a heater such as a gas burner, and then the circulating hot air is reheated. The hot air is sent again to the hot air jet nozzle using the fan and sprayed onto the fabric. As shown in Japanese Utility Model Application Publication No. 59-100899, a device for removing dust adhering to a filter was created by forming the filter into an endless belt shape and inserting a perforated cylinder inside one end of the filter. It is known that air is jetted out from the perforated cylinder, and while the filter is rotated, the dust on the filter is sucked out from a suction nozzle facing the perforated cylinder with the filter in between. There is.

(Problem to be solved by the invention) The conventional device jets air from a perforated cylinder at one end of an endless belt-shaped filter, sucks air from a suction nozzle facing this perforated cylinder, and Since the dust is separated from the filter by the action and sucked up by the suction nozzle, the structure becomes complicated because a perforated cylinder is required in addition to the suction nozzle, and whereas a perforated cylinder blows out air radially. Since the suction nozzle sucks only in a specific radial direction, there was a problem that the suction efficiency of the dust particles was low and the dust particles were scattered.

(Means for solving the problem) A dust removal device formed in an endless belt shape across the path of circulating hot air that is blown onto the fabric running in the chamber in a spread shape and circulates in the chamber. A filter is provided so that at least one end thereof protrudes outside the passage, and a suction nozzle that is long in the width direction of the filter is opened in proximity to the surface of the protruding portion of the filter, and is attached to the surface of the filter. In a filter cleaning device for a hot air treatment device for fabric, in which dust particles are removed by suction with a suction nozzle, the suction nozzle is opened toward a flat portion of the filter, and the suction nozzle is opened toward the back side of the filter where the suction nozzle opens. An airflow control plate having a size that covers the slit of the suction nozzle is provided opposite to the slit.

(Function) Since the flat part of the filter moves between the suction nozzle and the airflow control plate, and the airflow control plate is located on the back side of the flat part of the filter, almost no airflow passes through the filter and flows to the suction nozzle. Instead, the air flows in opposite directions along the surface of the filter toward the tip of the suction nozzle, collides with the tip of the suction nozzle, and then is sucked into the suction nozzle. Therefore, the dust adhering to the surface of the filter is peeled off from the filter by the air flowing along the surface of the filter, and then sucked up by the suction nozzle.

(Example) In FIGS. 1 and 3, 1 is a chamber of a tenter-type hot air treatment apparatus, which has a length of 12 to 30 m, and the inside thereof is separated by a horizontal partition plate 2 to a length of approximately 3 m.
It is divided into unit chambers 3. An opening 2a is provided in the center of the partition plate 2, and a pair of left and right tenter chains (not shown) run along a tenter rail (not shown) passing through the opening 2a. The fabric F is held and conveyed in a spread shape by the chain, and hot air is blown onto both the upper and lower surfaces of the fabric F.

The chamber 1 is provided with a pair of left and right hot air circulation devices for each unit chamber 3. That is, a vertical partition plate 4 is provided close to the side wall 1a and parallel to the side wall 1a. This vertical partition plate 4 is slightly shorter in length than the unit chamber 3, and its one end (the left end in FIG. 3) is in close contact with one horizontal partition plate 2 at the front and rear of the unit chamber 3, and the other end (the left end in FIG. (right end) is fixed away from the other horizontal partition plate 2, and a hot air passage 5 surrounded on all four sides by this vertical partition plate 4, the side wall 1a of the chamber 1, the ceiling plate 1b, and the bottom plate 1c is formed,
The hot air passage 5 communicates with the center of the unit chamber 3 at the other end of the vertical partition plate 4. A filter 6 is provided at the entrance of the hot air passage 5 formed at the other end of the vertical partition plate 4, and a heater 7 such as a gas burner and a circulation fan 8 are provided inside the filter 6. A pair of upper and lower hot air injection nozzles 9, 9 are connected to the exhaust port, and the hot air flows through the circulation fan 8, the hot air injection nozzle 9, the center of the unit chamber 3, the filter 6, and the hot air as shown by arrows A, B, and C. The hot air is circulated in the order of the hot air passage 5 and the heater 7.

The filter 6 is an endless belt made of a coarse woven fabric or net made of stainless steel wire or synthetic fiber filament. It is stretched between the lower roller 11 installed on the side, that is, below the bottom plate 1c of the chamber 1.
Note that the lower part of the filter 6 is guided downward through a slit bored in the bottom plate 1c. and,
The lower roller 11 is provided in a dust suction case 12 fixed to the lower surface of the bottom plate 1c, and is driven by a motor sprocket 13a and an endless chain 1 by a motor 13 fixed to the outer surface of the dust suction case 12.
4 and the drive sprocket 11a in the direction of arrow P, and the upstream portion 6a of the filter 6 in the hot air circulation direction moves downward,
The downstream portion 6b moves upward.

A suction nozzle 15 is provided adjacent to the downstream portion 6b in the dust suction case 12 (see FIG. 2),
A slit 15 with a length approximately equal to the width of the filter 6
a opens toward the surface of the downstream portion 6b. Note that 18 is an intake pipe, 19 is an electromagnetic on-off valve, and a blower (not shown) is connected to the intake pipe 18. An airflow control plate 20 is provided in close contact with the back surface of the downstream portion 6b. The length of this airflow control plate 20 (the size in the direction perpendicular to the paper surface in FIG. 2) is the length of the filter 6.
The width H of the airflow control plate 20 (lengthwise dimension of the filter 6) is set to be approximately the same as the width W of the slit 15a of the suction nozzle 15, and the width W of the slit 15a of the suction nozzle 15 is set to be approximately the same as the width of the filter When the gap L with the side portion 6b is 3 to 5 mm, it is set to 50 to 100 mm.

In the above configuration, the circulating hot air blown onto the fabric F sequentially passes through the upstream portion 6a and the downstream portion 6b of the stationary belt-shaped filter 6, and most of the circulating hot air is passed through the stationary belt-shaped filter 6. Dust particles are captured by the upstream portion 6a. After a predetermined period of operation, the filter 6 is rotated half a turn at low speed in the direction of arrow P in FIG. , passes in front of the slit 15a of the suction nozzle 15 and is cleaned, exchanging positions with the downstream portion 6b.

In the above embodiment, the filter 6 and the suction nozzle 15 may be continuously driven to constantly suck and remove dust particles little by little. Further, the suction nozzle 15 may be provided toward the upstream portion 6a as long as it is a flat portion of the filter 6. Further, in the above embodiment, the filter 6 is stretched in the vertical direction, but it may be stretched in the width direction of the hot air passage 5 so that one end of the filter 6 protrudes outward from the side wall 1a. However, in the embodiment, the width of the filter 6 is narrower, and the suction nozzle 15 can be made smaller. Further, if there is a portion where the circulating hot air flows in the vertical direction, the filter 6 can be stretched horizontally in this portion and one end of the filter 6 can be made to protrude outward from the side wall 1a.

(Effect of the invention) Since the airflow control plate is provided opposite the suction nozzle, compared to the case without the airflow control plate,
There is almost no turbulence in the airflow toward the suction nozzle, and airflows are generated that flow oppositely in the length direction of the filter, so that dust particles on the filter are efficiently separated and sucked up by the suction nozzle. Compared to the case where a perforated cylinder is provided at the position of the roller for tensioning a belt-shaped filter, this perforated cylinder is not required, and the dust particles trapped in the filter are not scattered, and the dust particles can be removed efficiently. You can clean the filter by blotting it up.

[Brief explanation of drawings]

Figure 1 is a partially fragmented side view of an embodiment of this invention.
2 is an enlarged view of the main part of FIG. 1, and FIG. 3 is a sectional view taken along the line -- in FIG. 1: Chamber, 5: Hot air passage, 6: Filter,
7: Heater, 8: Circulation fan, 9: Hot air injection nozzle, 13: Drive motor, 15: Suction nozzle,
15a: slit, 20: airflow control board.

Claims (1)

[Scope of Claim for Utility Model Registration] [1] Removal of dust particles formed in an endless belt shape across a path of circulating hot air that is blown onto a cloth running in a spread shape in a chamber and circulated in the chamber. A filter is provided such that at least one end thereof protrudes outside the passage, and a long suction nozzle is opened in the width direction of the filter in proximity to the surface of the protruding portion of the filter, and the suction nozzle is attached to the surface of the filter. In a filter cleaning device for a hot air treatment device for fabric, which uses a suction nozzle to remove dust particles, the suction nozzle is opened toward a flat part of the filter, and the suction nozzle is opened toward the back side of the filter. 1. A filter cleaning device for a hot air treatment device for fabric, characterized in that an airflow control plate of a size to cover the slit of a suction nozzle is provided opposite the slit. [2] A circulating hot air passage is formed so that the circulating hot air after being blown onto the fabric flows in the length direction along the side wall of the chamber, and a belt-shaped filter is installed to vertically cross this passage. A filter cleaning device for a hot air treatment device for fabric according to claim 1, wherein a lower end of the filter cleaning device is provided with a filter, the lower end of which protrudes below the chamber. [3] A filter cleaning device for a fabric hot air treatment device according to claim 1 or 2, wherein the airflow control plate has a size of 50 to 100 mm in the length direction of the belt-shaped filter.