CN114424902A

CN114424902A - Cleaner head

Info

Publication number: CN114424902A
Application number: CN202110007352.XA
Authority: CN
Inventors: 添本和彦; 宇泽启
Original assignee: Takusyo Co ltd
Current assignee: Takusyo Co ltd
Priority date: 2020-10-29
Filing date: 2021-01-05
Publication date: 2022-05-03
Also published as: JP7160376B2; TWI792118B; JP2022125159A; JP2022071955A; KR20220057392A; TW202216310A

Abstract

The invention provides a cleaner head, which can easily adjust the tiny gap size of a discharge slit. A squeezing and stretching mechanism (Y) which is rotated from the outside (11) of the pair of side wall parts (1B, 1B) of the cleaner head body and applies a squeezing force (F) to the inner dividing wall parts (3, 3)₁) And a tensile force to increase or decrease the minute gap size (epsilon).

Description

Cleaner head

Technical Field

The present invention relates to cleaner heads.

Background

Heretofore, a cleaner head having a cross-sectional shape as shown in fig. 7 or 8 is known (see patent document 1). Specifically, the cleaner head body 55 is provided with an extruded material, and integrally includes a surrounding outer wall 51 having a rectangular cross section, and a pair of partitioned

inner wall portions

54 and 54 partitioning the inside of the surrounding outer wall 51 into a vacuum space 52, a pressure space 53, and a vacuum space 52.

The high-pressure air in the central pressure space 53 is ejected as indicated by an arrow 56, hits a workpiece (surface to be cleaned) 57, and is immediately sucked into the vacuum space 52 as indicated by

arrows

58 and 58. As shown in fig. 7, the nozzle has a side 59 facing the workpiece (surface to be cleaned) 57, and in fig. 8 and 9, enlarged views of the side 59 are shown, and a discharge slit 60 having a small gap size ∈ is provided in the middle of a portion connecting the lower ends of the pair of divided inner wall portions 54. Further, a pair of

suction slits

61, 61 is provided in one side 59.

Documents of the prior art

Patent literature

Patent document 1: japanese patent No. 4940323.

Disclosure of Invention

Problems to be solved by the invention

However, the gap size ∈ of the discharge slit 60 is much smaller than the gap sizes of the

suction slits

61 and 61, and when the minute gap size ∈ of the discharge slit 60 is slightly larger than a predetermined value, the air discharge speed decreases, and a stable and sufficient dust removal effect cannot be obtained. Conversely, when the minute gap size ∈ of the discharge slit 60 is slightly smaller than a predetermined value, the pressure loss during air discharge increases, and therefore the air discharge speed does not increase, and a sufficient dust removal effect cannot be obtained.

Then, as shown in fig. 8 and 9, a gap adjusting structure 65 for increasing or decreasing the gap size ∈ of the discharge slit 60 is provided. The clearance adjustment structure 65 includes a band plate 63 having screw holes 62,

bolts

64, 64 screwed into the respective screw holes 62, a large-diameter counterbore 66 drilled from the outside of the side 59, and a hole (inner diameter D)₆₇Of (d) a medium diameter bore 67. The belt plate 63 has a shallow groove 68 communicating with the discharge slit 60, and has a through hole 69 communicating the groove 68 and the pressure space 53.

A method of adjusting the minute gap size ∈ of the discharge slit 60 by the gap adjustment structure 65 described above will be described below. That is, in fig. 9, the gap dimension ∈ can be set to a predetermined value by loosening the bolt(s) 64 with an operation tool such as a hexagonal wrench from the lower side (outside), measuring the gap dimension ∈ with a thin strip-shaped measuring instrument a plurality of times, while causing the

inside wall sections

54, 54 to approach (or separate) from each other (in cross section) and deforming by rocking, so as to maintain the gap dimension ∈ at a predetermined value, and immediately tightening the screw 64.

However, the gap adjusting structure 65 described with reference to fig. 8 and 9 has the following disadvantages in the adjustment operation of the fine gap size ∈ of the discharge slit 60. That is, (i) the operation of screwing in and unscrewing the bolts 64 and the operation of moving the inside and outside of the inside

partition wall portions

54, 54 closer to each other and away from each other to reduce the gap dimension ε, the operation of increasing the gap dimension ε must be performed with skill, and the operation is extremely difficult; (ii) the operation of bringing the inside-

wall defining portions

54, 54 close to each other from the outside of the one side 59 requires hanging a vice (vice) or the like on the

suction slits

61, 61 of a minute size, which is difficult to operate and may damage the suction slit 61; (iii) in the dust removal operation of the printing roller, the stretching roller, the plastic film, and the like, if the bolt 64 is loosened, there is a risk of a serious accident that the bolt easily falls off and directly contacts the surface to be dust removed of the printing roller or the like to cause damage. The gap adjusting structure 65 of the discharge slit 60 of the conventional cleaner head has the above-described disadvantages (i), (ii), (iii).

Means for solving the problems

In view of the above, the present invention provides a cleaner head comprising a cleaner head body made of an extruded material and integrally including a surrounding outer wall portion and a pair of partitioned inner wall portions partitioning an inner space of the surrounding outer wall portion into a vacuum space, a pressure space, and a vacuum space; the surrounding outer wall portion has a side disposed opposite to the dust-removed surface in cross section; a discharge slit having a minute gap size opened at one side thereof and discharging high-pressure air in the pressure space formed between the pair of inner partition wall portions; the cleaner head includes a pressing and stretching mechanism that is rotated from the outside of each of the pair of side wall portions orthogonal to the one side to apply a pressing force to the inner partition wall portion and a stretching force to increase or decrease the minute gap size.

The press-and-pull mechanism alternately arranges the press bolts and the pull bolts at a predetermined pitch in the longitudinal direction of each of the pair of side wall portions.

Further, the extruding and drawing mechanism is configured to: disposing large-diameter screw holes at the predetermined pitch along the longitudinal direction of each of the pair of side wall portions; a pair of divided inner wall portions having a pair of inner wall portions, each of which has a major diameter and a minor diameter, and each of which has a major diameter and a minor diameter; the extrusion bolt has a large-diameter male thread adapted to the large-diameter threaded hole; a tension bolt having a small-diameter male screw fitted to the small-diameter screw hole at a distal end thereof, a medium-diameter male screw movably inserted into the large-diameter screw hole at a proximal end thereof, and a tension adjusting nut screwed to a portion of the medium-diameter male screw protruding from the side wall portion; the pressing bolts and the tension bolts are alternately arranged along the longitudinal direction of each of the pair of side wall portions.

The cleaner head further includes a cleaner head body made of an extruded material, and integrally including a surrounding outer wall portion and a pair of partitioned inner wall portions partitioning an inner space of the surrounding outer wall portion into a vacuum space, a pressure space, and a vacuum space; the surrounding outer wall portion has a side disposed opposite to the dust-removed surface in cross section; a discharge slit having a minute gap size opened at one side thereof and discharging high-pressure air in the pressure space formed between the pair of inner partition wall portions; the cleaner head body is configured to: a pair of side wall portions orthogonal to the one side in cross section are each provided with a squeeze restricting bolt at a predetermined pitch in a longitudinal direction; the pressure space is configured to allow the extrusion regulating bolt to be screwed in and out from the outside of the side wall portion in a predetermined pressurized state so that a tip end surface of the extrusion regulating bolt abuts against the dividing inner wall portion; the size of the micro gap is adjusted.

Effects of the invention

According to the present invention, the adjustment of the minute gap size of the suction slit can be easily and reliably performed from the outside of the side wall portion. Further, the operation can be easily and quickly performed without damaging the suction slit or the like. In addition, the operation position for measuring the minute gap size of the suction slit and the operation position of the extruding and drawing mechanism are different by 90 degrees, so that the two operations can be performed quickly and accurately without interfering with each other.

Drawings

Fig. 1 is a cross-sectional view showing a cleaner head body of one embodiment of the present invention.

Fig. 2 is a view for explaining the structure of the main part of the present invention, (a) is an enlarged view of the main part of fig. 1, (B) is an explanatory view of the structure of the main part as viewed from the right side of (a), and (C) is an explanatory view of an external appearance of the cleaner head.

Fig. 3 is a view for explaining the structure of the main part of the present invention, (a) is a main part sectional front view, (B) is a partial sectional front view, and (C) is a partially enlarged view of (a).

Fig. 4 is a view for explaining the structure of the main part, where (a) is a main part cross-sectional front view, and (B) is an enlarged view of the main part of (a).

Fig. 5 is a sectional front view showing another embodiment.

Fig. 6 is an enlarged view of a main portion of fig. 5.

Fig. 7 is a sectional front view showing a conventional example.

Fig. 8 is a sectional front view illustrating a conventional gap adjustment structure.

Fig. 9 is an enlarged sectional view of a main portion of fig. 8.

Detailed Description

The present invention will be described in detail below based on the illustrated embodiments.

In fig. 1 to 4, the cleaner head of the present invention includes a cleaner head main body 5 made of an extruded material, which integrally has a surrounding outer wall portion 1 having a rectangular cross section, and a pair of partitioned

inner wall portions

3 and 3 partitioning an inner space 1M of the surrounding outer wall portion 1 into a vacuum space 10, a pressure space 15, and a vacuum space 10.

In fig. 2(C), a part of the cleaner head body 5 is an elongated body having a relatively large longitudinal dimension as viewed in a perspective view. That is, the appearance may be referred to as an elongated corner tube. As shown in fig. 2(C), the opening portions at the left and right ends of the cleaner head body 5 are closed by rectangular plates 6, and a high-pressure air supply pipe 7 and

air suction pipes

8 and 8 are attached to one of the rectangular plates 6. In the description of the present invention, the cleaner head body 5 is defined as an elongated body from which the attached components such as the rectangular plate 6, the high-pressure air supply pipe 7, the air suction pipes 8, and the like are removed.

And the surrounding outer wallThe section 1 has one side 1A disposed opposite (parallel to) the dust-removed surface 9 in cross section. The discharge slit 2 for discharging the minute gap size epsilon of the high-pressure air in the pressure space 15 formed between the pair of divided

inner wall portions

3, 3 is opened at the center of the one side 1A. A squeezing/stretching mechanism Y which is operated to rotate from the outer part 11 of each of the

side wall parts

1B, 1B (a pair of left and right side walls) orthogonal to the one side 1A and applies a squeezing force F to the inside-wall-defining part 3₁Tensile force F₂The small gap size epsilon is adjusted in an increasing or decreasing manner.

In fig. 1 and 2, most of the components constituting the extruding and drawing mechanism Y are omitted from the drawings, and only the cleaner head body 5 is mainly shown, and the alternate long and short dash line 12 shows the height position and the arrangement direction in which the extruding and drawing mechanism Y is arranged. Specifically, the extruding-drawing mechanism Y includes a pair of

side wall portions

1B, 1B each having a predetermined pitch P in the longitudinal direction thereof₀A compression bolt 21 (see fig. 3) and a tension bolt 22 (see fig. 4) arranged (see fig. 2C).

Further, as shown in fig. 1 to 4, the extruding-drawing mechanism Y is explained in detail, and a predetermined pitch P is provided along the longitudinal direction of each of the pair of

side wall portions

1B, 1B ₀A large diameter threaded hole 13 is provided. Further, the pair of inner

partition wall parts

3, 3 are spaced apart from each other at the predetermined pitch P in the longitudinal direction₀The small diameter screw holes 14 are arranged at the same pitch.

The axial center of the small-diameter threaded hole 14 is coaxial with the axial center of the large-diameter threaded hole 13. In other words, as shown in fig. 2 a, the small diameter screw hole 14 is disposed on the same axial center (one-dot chain line 12) as the large diameter screw hole 13. That is, if the screw hole 14 is viewed from the direction perpendicular to the side wall 1B shown in fig. 2 a, the screw hole 13 can be seen (concentrically) inside the screw hole 14 as shown in fig. 2B.

Further, as shown in fig. 3, the pressing bolt 21 has a large-diameter male thread 21A adapted (screw-fitted) to the large-diameter screw hole 13 of the side wall portion 1B. Further, a positioning small-diameter short projection 21C projects from the distal end surface 21B of the pressing bolt 21, and the small-diameter projection 21C is inserted into the small-diameter screw hole 14 in a clearance fit manner as shown in fig. 3(C), thereby preventing the distal end of the pressing bolt 21 from wobbling. Further, as shown in fig. 3, a nut 27 is desirably attached. Further, the pressing bolt 21 has a head 21E with a hexagonal hole (in addition, a hexagonal head may be also used) at its outer end.

As shown in fig. 4, the tension bolt 22 has a small-diameter male thread 22A at its distal end that fits (is screwed) into the small-diameter threaded hole 14 of the inner partition wall portion 3. Further, the base end 23 of the tension bolt 22 has a medium-diameter male thread 24, and the medium-diameter male thread 24 is set to have a major diameter so as to be freely inserted into the large-diameter threaded hole 13 of the side wall portion 1B (see fig. 4B).

Further, the tension adjusting nut 25 is screwed to a portion 24E of the tension bolt 22 where the middle-diameter male thread 24 protrudes from the side wall portion 1B. Further, a slit 26 into which a rotational torque applying tool such as a driver is inserted is formed at the outer end of the tension bolt 22. The pressing bolts 21 and the tension bolts 22 having such a shape and structure are alternately arranged in a straight line along the longitudinal direction of the side wall portion 1B. Thus, as shown in FIG. 2(C), the sidewall portion 1B has a predetermined pitch P along the longitudinal direction of the outer surface thereof₀Alternately imparting a pressing force F₁And tensile force F₂The minute gap size ∈ of the discharge slit 2 can be adjusted by swinging the partition inner wall portion 3 (see arrow M3 in fig. 3 or 4).

However, it is desirable that the large diameter screw hole 13 and the large diameter male thread 21A be M6, the medium diameter male thread 24 be M4, the small diameter screw hole 14 and the small diameter male thread 22A be M3, and the outer diameter of the projection 21C be 2.6 mm. If such dimensions are set, the press bolt 12 and its accompanying parts, and the tension bolt 22 and its accompanying parts, which are greatly different in size, shape, and function, can be used for the large-diameter screw hole 13 and the small-diameter screw hole 14, which are all the same in size and shape.

Next, another embodiment shown in fig. 5 and 6 will be described below. The basic shape and structure of the cleaner head body 5 are the same as already described with reference to fig. 1 to 4. That is, as shown in fig. 5 and 6, the following structure is adopted: a cleaner head body 5 made of an extruded material is provided, which integrally has a surrounding outer wall portion 1 and a pair of partitioned

inner wall portions

3, 3 partitioning an inner space 1M of the surrounding outer wall portion 1 into a vacuum space 10, a pressure space 15 and the vacuum space 10, wherein the surrounding outer wall portion 1 has a side 1A arranged to face a surface 9 to be cleaned in a cross section, and a discharge slit 2 having a small gap dimension epsilon is provided to open in the side 1A, and discharges high-pressure air in the pressure space 15 formed between the pair of partitioned

inner wall portions

3, 3.

However, the following structure (shape, structure) is different. That is, a plurality of the press restriction bolts 30 are arranged at a predetermined pitch in the longitudinal direction on the pair of

side wall portions

1B, 1B orthogonal to the one side 1A. That is, in contrast to the use of two types of bolts, the pressing bolt 21 and the tension bolt 22 in the above-described embodiment (see fig. 1 to 4), in the other embodiment shown in fig. 5 and 6, only a plurality of pressing restriction bolts 30 are arranged in the longitudinal direction of the cleaner head body 5, which is the direction perpendicular to the paper surface of fig. 5 and 6.

In a state where the pressure in the pressure space 15 is zero (atmospheric pressure state), as shown in fig. 6 a, the gap size ∈' of the discharge slit 2 may be smaller than the normal size. Then, a predetermined small gap Δ G is provided between the front end surface 30A of the pressing restriction bolt 30 and the partition inner wall portion 3.

Thereafter, the pressure P in the pressure space 15 is brought₁₅Under the state of the predetermined pressure increased to the predetermined value, the structure is as follows: as shown in fig. 6(B), the tip end surface 30A of the pressure regulating bolt 30 abuts against the inner partition wall portion 3, and the pressure regulating bolt 30 is screwed in and out from the outer portion 11 of the side wall portion 1B to increase or decrease the minute gap dimension ∈ of the discharge slit 2. Further, when the cleaner head is used for an apparatus requiring dust removal, it is desirable that the pressure P (illustrated in fig. 6 (B)) be as low as possible₁₅The pressure is set to the same value as the air pressure supplied (used) in the pressure space 15.

In the embodiments shown in fig. 1 to 4, or fig. 5 and 6, in order to accurately and easily and quickly perform the operation of screwing and unscrewing the

bolts

21, 22 and 30 while measuring the small gap dimension ∈ of the discharge slit 2 with a precision measuring instrument such as a slit gauge, it is desirable (not shown) to be installed and performed on the floor surface or the like upside down from fig. 1 to 4, 5 and 6. Further, since the gap size of the suction slit 4 through which air is sucked is much larger than the gap size ∈ of the discharge slit 2, the change in the flow rate of the intake air from the suction slit 4 due to the adjustment change amount of the small gap size ∈ is small in the present invention.

The present invention is not limited to the above-described embodiment, and the design may be changed as desired, and each inner partitioning wall 3 may be connected from the side wall portion 1B to the one side 1A, but may be connected from the upper wall portion 1C to the one side 1A.

As described above in detail, the cleaner head of the present invention comprises a cleaner head body 5 made of an extruded material, which integrally has a surrounding outer wall portion 1, and a pair of divided

inner wall portions

3, 3 dividing an inner space 1M of the surrounding outer wall portion 1 into a vacuum space 10, a pressure space 15, and the vacuum space 10; the surrounding outer wall portion 1 has a side 1A disposed opposite to the dust-removed surface 9 in cross section; a discharge slit 2 having a small gap size epsilon opened at the one side 1A and discharging high-pressure air in the pressure space 15 formed between the pair of inner

partition wall parts

3, 3; the cleaner head is provided with a squeezing and stretching mechanism Y which is rotated from the outer part 11 of each of a pair of

side wall parts

1B, 1B orthogonal to the one side 1A to apply a squeezing force F to the inner

partition wall parts

3, 3₁Tensile force F₂Since the small gap size ∈ is adjusted to increase or decrease, the pressing force F can be easily applied in order from (a wide operating space of) the outer portion 11 of the side wall portion 1B ₁Tensile force F₂The fine gap size ε can be accurately and quickly adjusted. Further, since the external force is directly applied to the

side wall portions

1B and 1B, the fine gap dimension ∈ can be smoothly and easily adjusted to increase or decrease.

Further, since the press-and-pull mechanism Y is configured such that the press bolts 21 and the pull bolts 22 are alternately arranged at a predetermined pitch in the longitudinal direction of each of the pair of

side wall portions

1B and 1B, if the gap dimension ∈ is too large, the press bolts 21 can be screwed in, and fine adjustment for reduction can be easily performed. Conversely, if the gap size ∈ is too small, the tension bolt 22 can be rotated to make a subtle incremental adjustment easily.

Further, the extruding-drawing mechanism Y is configured to: a predetermined pitch P along the longitudinal direction of each of the pair of

side wall portions

1B, 1B₀Configuring a large-diameter threaded hole 13; and a predetermined pitch P along the longitudinal direction of the pair of inner

partition wall parts

3, 3₀Small-diameter screw holes 14 arranged at the same pitch and on the same axial center as the large-diameter screw holes 13; the extrusion bolt 21 has a large-diameter male thread 21A adapted to the large-diameter threaded hole 13; the tension bolt 22 has a small-diameter male thread 22A at a tip end thereof adapted to the small-diameter threaded hole 14, and a medium-diameter male thread 24 at a base end 23 thereof to be freely inserted into the large-diameter threaded hole 13, the medium-diameter male thread 24 having a tension adjusting nut 25 to be screwed to a portion 24E protruding from the side wall portion 1B; since the pressing bolts 21 and the tension bolts 22 are alternately arranged in the longitudinal direction of each of the pair of side wall portions 1B, the same large-diameter screw holes 13 can be arranged at a predetermined pitch in the side wall portion 1B, and therefore, the machining operation is easy. Further, the small-diameter screw holes 14 having the same size may be arranged at predetermined intervals in the inner dividing wall portion 3, and the machining operation is easy. Further, in a state where the large-diameter screw holes 13 and the small-diameter screw holes 14 are arranged as a set on the same axis, since the pressing bolts 21 and the tension bolts 22 can be alternately screwed and arranged in the longitudinal direction of the side wall portion 1B, the adjustment operation of increasing and decreasing the clearance dimension ∈ with high accuracy can be easily and accurately performed without skill at each position in the longitudinal direction of the long discharge slit 2.

The cleaner head further includes a cleaner head body 5 made of an extruded material, which integrally includes a surrounding outer wall portion 1 and a pair of partitioned inner wall portions 3 and 3 partitioning an inner space 1M of the surrounding outer wall portion 1 into a vacuum space 10, a pressure space 15, and the vacuum space 10; the surrounding outer wall 1 has a cross sectionA side 1A disposed opposite to the dust-removed surface 9 in cross section; a discharge slit 2 having a small gap size epsilon opened at the one side 1A and discharging high-pressure air in the pressure space 15 formed between the pair of inner partition wall parts 3, 3; the cleaner head is configured to: a pair of side walls 1B, 1B orthogonal in cross section to the one side 1A are each formed at a predetermined pitch P in the longitudinal direction₀A pressing restriction bolt 30 is provided; the pressure space 15 is configured to allow the extrusion regulating bolt 30 to be screwed in and out from the outer portion 11 of the side wall portion 1B in a predetermined pressurized state so that the front end surface 30A of the extrusion regulating bolt 30 abuts against the dividing inner wall portion 3; by adjusting the small gap dimension e in an increasing or decreasing manner, the tension bolt can be omitted, and the pressing restriction bolt 30 can be used alone, thereby simplifying the components. Further, the pressure P in the pressurized state of the pressure space 15 can be set ₁₅The gap size epsilon adjusted by the same pressure is set to be the same as the air pressure used in the actual working equipment, and the excellent dust removing performance is reliably exerted by the optimal air spraying speed in the actual working.

Description of the symbols

1 surrounding the outer wall

1A side

1B side wall part

1M inner space

2 slit for discharge

3 dividing the inner wall

5 Cleaner head body

9 surface to be dedusted

10 vacuum space

11 outer part

13 major diameter screw hole

14 small diameter screw hole

15 pressure space

21 extrusion bolt

21A major diameter pin thread

22 draw bolt

22A minor diameter male thread

23 base end

24 medium diameter male thread

24E protruding part

25 adjusting nut for stretching

30 extrusion limit bolt

30A front end face

F₁Extrusion force

F₂Tensile force

P₀Specified pitch

Y extrusion drawing mechanism

Epsilon small gap size.

Claims

1. A cleaner head is provided with a cleaner head body (5) made of an extruded profile, which integrally has a surrounding outer wall part (1) and a pair of divided inner wall parts (3) (3) for dividing an inner space (1M) of the surrounding outer wall part (1) into a vacuum space (10), a pressure space (15) and the vacuum space (10);

the surrounding outer wall portion (1) has one side (1A) which is arranged opposite to the surface (9) to be dedusted on the cross section;

A discharge slit (2) having a minute gap size (epsilon) and opening on the one side (1A) for discharging high-pressure air in the pressure space (15) formed between the pair of inner partition wall parts (3, 3);

characterized by comprising a squeezing and stretching mechanism (Y) which is rotated from the outer part (11) of each of a pair of side wall parts (1B) (1B) orthogonal to the one side (1A) and applies a squeezing force (F) to the inner dividing wall parts (3) (3)₁) Stretching force (F)₂) And increasing or decreasing the size (epsilon) of the micro gap.

2. The cleaner head according to claim 1, wherein the pressing and stretching mechanism (Y) alternately arranges pressing bolts (21) and stretching bolts (22) at a prescribed pitch in a longitudinal direction of each of the pair of side wall portions (1B).

3. The cleaner head according to claim 1, wherein the squeeze-and-stretch mechanism (Y) is configured to:

along the length direction of each of the pair of side wall parts (1B) (1B) at the prescribed pitch (P)₀) Configured with a large diameterA threaded hole (13);

further, a predetermined pitch (P) is formed along the longitudinal direction of the pair of inner partition wall parts (3, 3)₀) Small-diameter threaded holes (14) are arranged at the same distance and on the same axial center as the large-diameter threaded holes (13);

The extrusion bolt (21) has a large-diameter male thread (21A) adapted to the large-diameter threaded hole (13);

a tension bolt (22) having a small-diameter male thread (22A) at the tip end thereof adapted to the small-diameter threaded hole (14), a medium-diameter male thread (24) at the base end (23) thereof freely movably inserted into the large-diameter threaded hole (13), and a tension adjusting nut (25) screwed to a portion (24E) of the medium-diameter male thread (24) protruding from the side wall portion (1B);

the pressing bolts (21) and the tension bolts (22) are alternately arranged in the longitudinal direction of each of the pair of side wall portions (1B) (1B).

4. A cleaner head is provided with a cleaner head body (5) made of an extruded profile, which integrally has a surrounding outer wall part (1) and a pair of divided inner wall parts (3) (3) for dividing an inner space (1M) of the surrounding outer wall part (1) into a vacuum space (10), a pressure space (15) and the vacuum space (10);

It is characterized in that the structure is as follows:

a pair of side wall parts (1B, 1B) orthogonal in cross section to the one side (1A) are each formed at a predetermined pitch (P) in the longitudinal direction₀) A pressing restriction bolt (30) is provided,

the pressure space (15) is configured such that the extrusion limit bolt (30) is screwed in and out from the outside (11) of the side wall portion (1B) in a predetermined pressurized state so that the tip end surface (30A) of the extrusion limit bolt (30) abuts against the dividing inner wall portion (3),

and (c) adjusting the size (epsilon) of the micro gap in an increasing and decreasing manner.