JP2002286282A - Blow nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blow nozzle, unified in the direction and velocity of flow of air discharged out of the blow nozzle like a belt and capable of being manufactured with a low cost. SOLUTION: The blow nozzle 1 is constituted so that an inner tube 3, on which a slit 7 is formed, is arranged in an outer tube 2, on which a slit 6 is formed, and a space, formed between the outer tube 2 and the inner tube 3 upon arranging the inner tube 3 in the outer tube 2, is utilized as the flow passage 8 of air while air, supplied from the blower 15 through one end side of the inner tube 3, is discharged out of the slit 6 of the outer tube 2 through the inner tube 3, the slit 7 of the same and the flow passage 8. The space formed between the outer tube 2 and the inner tube 3 is partitioned by a bulkhead 9 and the slit 6 of the outer tube 2 is positioned at one side of the bulkhead 9 while the slit 7 of the inner tube 3 is positioned at the other side of the bulkhead 9 whereby the space from the slit 7 of the inner tube 3, which is positioned at the other side of the bulkhead 9, to the slit 6 of the outer tube 2, which is positioned at one side of the bulkhead 9, can be utilized as the flow passage 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blow nozzle for discharging air supplied from a blower in a belt shape.
More specifically, the present invention relates to a blow nozzle which has a uniform distribution of flow direction and flow velocity of air discharged from the blow nozzle in a band shape and can be manufactured at low cost.

[0002]

2. Description of the Related Art As is well known, for drying products, particularly for drying IC components and the like to be dried on a belt conveyor in a production line for manufacturing products such as IC components, and forming an air curtain. For this purpose, a blow nozzle capable of discharging air (hot air or the like) in a band shape is used.

[0003] The blow nozzle is discharged in a band shape from the blow nozzle in order to uniformly dry an object to be dried such as an IC component positioned on a belt conveyor or to form a good air curtain. It is required that the distribution of the air flow direction and the flow velocity be uniform, and a blow nozzle having a rectifying mechanism as disclosed in JP-A-9-79749 and JP-A-2000-334333 is a blow nozzle that meets the above requirements. Has been proposed.

[0004] However, the above-mentioned Japanese Patent Application Laid-Open No.
And the blow nozzle disclosed in Japanese Patent Application Laid-Open No. 2000-334333 require a rectifying mechanism such as a rectifying plate to rectify air discharged from the blow nozzle, and as a result, a large number of parts and an assembling process thereof are required. However, there is a problem that the manufacturing cost of the blow nozzle is increased, and there is a demand for reducing the manufacturing cost and providing a blow nozzle having a lower manufacturing cost.

On the other hand, a blow nozzle having a simple structure using only a cylindrical body having a slit formed in the longitudinal direction has been used as a blow nozzle having a low manufacturing cost. The distribution of the flow direction and the flow velocity of the air discharged from the blow nozzle composed of only the formed cylindrical body in a band shape is poor in uniformity. Improvements were made to make the distribution uniform, and FIG.
6, a blow nozzle 21 as shown in FIG. 17 has been proposed.

The improved blow nozzle 21 comprises an outer cylinder 22 having a slit 26 formed in the longitudinal direction, and an inner cylinder 23 provided in the outer cylinder 22 and having a slit 27 formed in the longitudinal direction. , A slit 2 formed in the outer cylinder
6 and the position of the slit 27 formed in the inner cylinder 23 by 180
By positioning them at different positions (opposite positions), the inner peripheral surface 24 of the outer cylinder 22 and the outer peripheral surface 25 of the inner cylinder 23
, That is, the flow paths 28 and 29 are formed on the left and right sides of the inner cylinder 23. Further, the inner cylinder 23 is eccentric within the outer cylinder 22 (in FIG. Inner cylinder 23
Center N is eccentric downward).
The slit 26 formed in the outer cylinder 22 is located at a position (lower side in the drawing) where the outer cylinder 22 and the inner cylinder 23 are closest to each other, and the slit 27 formed in the inner cylinder 23 is
The outer cylinder 22 and the inner cylinder 2 on the opposite sides of the slit 26
3 is located at the farthest position (upper side in the figure), the flow paths 28 and 29 formed on the left and right of the inner cylinder 23 are formed.
Is configured such that the cross-sectional area gradually decreases from the slit 27 of the inner cylinder 23 to the slit 26 of the outer cylinder 22.

The air is supplied to the blow nozzle 21 from one end of the inner cylinder 23 (the other end of the inner cylinder 23 and both ends of the outer cylinder 22 are closed).
Is supplied from one end of the inner cylinder 23 to the inside of the inner cylinder 23, the slit 27 of the inner cylinder 23, the flow paths 28 and 29 formed on the left and right sides of the inner cylinder 23, and the slit 26 of the outer cylinder 22. The air discharged from the blow nozzle 21 is rectified by the left and right flow paths 28 and 29, and the air discharged from the blow nozzle 21 is further rectified by the inner cylinder 23. The cross-sectional area is gradually reduced from the slit 27 of the outer cylinder 22 toward the slit 26 of the outer cylinder 22.
The air that has flowed into the upper and lower channels 8 and 29 is gradually narrowed down.
The rectifying effect on the air passing through the inside 9 is enhanced, and the distribution of the flow direction and the flow velocity of the air discharged from the blow nozzle 21 in a strip shape can be made uniform.

[0008]

According to the above prior art, the inner peripheral surface 24 of the outer cylinder 22 forming the blow nozzle 21 is formed.
And left and right flow passages formed between the inner tube 23 and the outer peripheral surface 25 and configured such that the cross-sectional area gradually decreases from the slit 27 of the inner tube 23 to the slit 26 of the outer tube 22. Due to the rectifying effects of the blowers 28 and 29, the distribution of the flow direction and the flow velocity of the air discharged from the blow nozzle 21 in a band shape can be made uniform. If there is a difference between the lengths of the left and right flow paths 28 and 29 formed with the outer peripheral surface 25 of the inner cylinder 23, that is, the flow path 2 located on the left and right of the inner cylinder 23
If the symmetry (right and left symmetry in FIG. 17) is lost, the flow velocity and the flow rate of the air discharged from the slit 27 of the inner cylinder 23 and divided into the left and right flow paths 28 and 29 are reduced. A difference occurs, and the difference between the flow velocity and the flow rate disturbs the balance of the air flowing out of the left and right flow paths 28 and 29, and as a result, the air flow merged and discharged from the slit 26 of the outer cylinder 22 is disturbed. And blow nozzle 2
There has been a problem that the distribution of the flow direction and the flow velocity of the air discharged in a band shape from No. 1 is not uniform.

Further, in order to solve the above-mentioned disadvantage,
It is necessary to improve the processing accuracy and the mounting accuracy of the outer cylinder 22 and the inner cylinder 23 and the like.
The effect of cost reduction obtained by adopting a simple structure of 1 will be impaired by an increase in cost for improving accuracy, and the blow nozzle 21 cannot be manufactured at low cost.

Therefore, the present invention solves the above-mentioned problem, and the distribution of the flow direction and the flow velocity of the air discharged from the blow nozzle in a strip shape is uniform, and the production can be performed at low cost. The purpose is to provide a blow nozzle.

[0011]

In order to achieve the above object, the present invention has the following technical means. That is, the outer cylinder 2 includes the outer cylinder 2 having a slit 6 formed in the longitudinal direction, and the inner cylinder 3 having the slit 7 formed in the longitudinal direction and disposed in the outer cylinder 2. The blow nozzle 1 uses a space formed between the inner peripheral surface 4 of the outer cylinder 2 and the outer peripheral surface 5 of the inner cylinder 3 when the inner cylinder 3 is formed as the air flow path 8.
An air supply port 10 is provided at one end of the
Is formed as a closed end 18, and one end and the other end of a space formed between the outer cylinder 2 and the inner cylinder 3 are set as closed ends 19 and 20, whereby the blower 15 is closed. Is configured to discharge air supplied through the air supply pipe 16 from the inside through the inner tube 3, the slit 7 of the inner tube 3, and the flow path 8 from the slit 6 of the outer tube 2. 1, in the space formed between the outer cylinder 2 and the inner cylinder 3,
A partition wall 9 for partitioning the space in the longitudinal direction is provided.
, The slit 6 of the outer cylinder 2 is positioned on one side of the partition 9, and at the same time, the slit 7 of the inner cylinder 3 is positioned on the other side of the partition 9 and positioned on the other side of the partition 9. Inner cylinder 3
A space from the slit 7 to the slit 6 of the outer cylinder 2 located on one side of the partition wall is defined as a flow path 8.

Further, the slit 6 of the outer cylinder 2 is adjacent to one side of the partition 9 and the inner cylinder 3 is
The slits 7 of the inner tube 3 to the slits 6 of the outer tube 2
However, it is characterized in that it is configured so as to make almost the entire circumference of the inner cylinder 3.

Further, the position of the slit 7 of the inner cylinder 3 is set to a position rotated by 180 degrees with respect to the position of the slit 6 of the outer cylinder 2, and the partition wall 9 is adjacent to the slit 6 of the outer cylinder 2. By providing the position or the partition 9 at a position adjacent to the slit 7 of the inner cylinder 3, the flow path 8 from the slit 7 of the inner cylinder 3 to the slit 6 of the outer cylinder 2 It is characterized in that it is configured to make a half turn around.

Further, the position of the slit 7 of the inner cylinder 3 is set to a position rotated by an arbitrary angle with respect to the position of the slit 6 of the outer cylinder 2, and the partition wall 9 is connected to the slit 6 of the outer cylinder 2. In the adjacent position, or when the partition 9 is
Is provided at a position adjacent to the slit 7 of the inner cylinder 3 so that the length of the flow path 8 from the slit 7 of the inner cylinder 3 to the slit 6 of the outer cylinder 2 can be adjusted to an arbitrary length. It is characterized by:

The present invention comprises the above technical means, wherein a partition wall 9 is provided in a space formed between the outer cylinder 2 and the inner cylinder 3, and the outer cylinder 2 is provided on one side and the other side of the partition wall 9 respectively. Slit 6
And the slit 7 of the inner cylinder 3 are located, and the space from the slit 7 of the inner cylinder 3 to the slit 6 of the outer cylinder 2 in the space partitioned by the partition 9 is used as the flow path 8. The flow path 8 of the air flowing from the slit 7 of the nozzle 3 to the slit 6 of the outer cylinder 2 becomes one, so that the air flow does not diverge or merge as in a conventional blow nozzle having two flow paths. Since the rectification effect in the flow path 8 is not impaired, the distribution of the flow direction and the flow velocity of the air discharged from the blow nozzle 1 in a band shape becomes uniform.

Moreover, the blow nozzle 1 has the inner cylinder 3 disposed in the outer cylinder 2 and partitions the space in the longitudinal direction into a space formed between the outer cylinder 2 and the inner cylinder 3. Partition 9
The blow nozzle 1
Can be manufactured at low cost.

Further, since the flow path 8 from the slit 7 of the inner cylinder 3 to the slit 6 of the outer cylinder 2 is configured to make substantially the entire circumference of the inner cylinder 3, the flow path 8 Nozzle 1 that maximizes the flow rectification effect
Is provided.

Further, by configuring the flow path 8 from the slit 7 of the inner cylinder 3 to the slit 6 of the outer cylinder 2 so as to make a half circumference around the inner cylinder 3, the rectification effect by the flow path 8 is improved. At the same time, the blow nozzle 1 that can suppress the loss in the flow path 8 is provided.

Furthermore, by configuring the length of the flow path 8 from the slit 7 of the inner cylinder 3 to the slit 6 of the outer cylinder 2 to be adjustable to any length, the blow nozzle can be used in various applications. Nozzle 1 is provided with an optimal length of the flow path 8 capable of coping with the performance and performance.

[0020]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. As shown in FIGS. 1 and 2, the blow nozzle 1 of the present invention has a slit 6 in the longitudinal direction.
Is formed, and an inner cylinder 3 provided with a slit 7 in the longitudinal direction provided in the outer cylinder 2. By disposing the inner cylinder 3 in the outer cylinder 2, The space formed between the inner peripheral surface 4 of the outer cylinder 2 and the outer peripheral surface 5 of the inner cylinder 3 is used as an air flow path 8.
An air supply port 10 is provided at one end of the
Of the space formed between the outer cylinder 2 and the inner cylinder 3 and the other ends thereof as closed ends 19 and 20, respectively. The air supplied through the air supply pipe 16 is configured to be discharged from the slit 6 of the outer cylinder 2 through the inner cylinder 3, the slit 7 of the inner cylinder, and the flow path 8.

As shown in FIGS. 2 and 3, a space formed between the outer cylinder 2 and the inner cylinder 3 is provided with a partition wall 9 for partitioning the space in the longitudinal direction. With the partition 9 as the center, the slit 6 of the outer cylinder 2 is positioned on one side of the partition 9 (the right side in FIG. 3), and at the same time, the other side of the partition 9 (FIG.
By locating the slits 7 of the inner cylinder 3 at the middle and left sides, a flow path 8 of the air flowing from the slits 7 of the inner cylinder 3 to the slits 6 of the outer cylinder 2 is formed.

In the present embodiment, the slit 6 of the outer cylinder 2 is made adjacent to one side of the partition 9 and the inner cylinder 3
By making the slit 7 adjacent to the other side of the partition 9
The flow path 8 from the slit 7 of the inner cylinder 3 to the slit 6 of the outer cylinder 2 is configured to make almost the entire circumference of the inner cylinder 3.

Further, a closed end 18 at the other end of the inner cylinder 3 constituting the blow nozzle 1 and a closed end at one end and the other end of a space formed between the outer cylinder 2 and the inner cylinder 3. 19, 20
Are closed and held at the ends by end caps 11 and 12, and the end caps 11 and 12
12 is provided with attachment members 13 and 14 for fixing the blow nozzle 1 at a predetermined position. In the present embodiment shown in FIG. It shows the case where it is done.

FIG. 4 shows an example of the slit 6 formed in the outer cylinder 2 constituting the blow nozzle 1. As shown in FIG.
And a long and narrow hole (several mm and ten and several cm in length)
The slits 6 are formed by forming a single line in the longitudinal direction of the cylindrical body that forms.

FIG. 5 shows an example of a slit 7 formed in the inner cylinder 3 of the blow nozzle 1. As shown in FIG.
The slits 7 are formed by forming rectangular holes (several mm in width and several times the width in width) in a row at predetermined intervals in the longitudinal direction of the cylindrical body.

In this embodiment, a case is shown in which the outer cylinder 2 and the inner cylinder 3 are formed by cylindrical tubes. In this case, the diameter of the outer cylinder 2 and the diameter of the inner cylinder 3 are determined by the blow nozzle The length of the blow nozzle 1 varies depending on the length of the blow nozzle 1 and the amount of air discharged from the blow nozzle 1.
In the case of (2), if the diameter of the outer cylinder 2 is about 114 mm (thickness 2 mm), the diameter of the inner cylinder 3 is about 89 mm (thickness 2 mm).

An air supply pipe 16 from the blower 15 is connected to one end of the inner cylinder 3 of the blow nozzle 1 configured as described above.
Supplied through the inner cylinder 3, a slit 7 formed in the inner cylinder 3, and a flow path 8 that makes a substantially complete revolution around the inner cylinder 3.
Through the slits 6 formed in the outer cylinder 2, and the flow direction of the air flowing through the flow path 8 due to the rectifying effect of the flow path 8 which makes a substantially complete revolution around the inner cylinder 3. And the flow velocity is made uniform, so that the distribution of the flow direction and the flow velocity of the air discharged from the blow nozzle 1 in a strip shape become uniform.

Further, a more detailed look at the state of the air flow in the blow nozzle 1 is shown in FIG. 6 (in this figure, the air flow in the blow nozzle 1 can be grasped three-dimensionally. As shown in FIG. 3, the flow path 8 is supplied into the inner cylinder 3 and passes through the slit 7 of the inner cylinder 3.
The air blown into the inside flows through the flow path 8 formed between the outer cylinder 2 and the inner cylinder 3 toward the slit 6 of the outer cylinder 2 (arrow a in the drawing), and The other closed end 20 (closed end 18 side of the inner cylinder 3) in the space between the outer cylinder 2 and the inner cylinder 3 along the partition wall 9 that partitions the space between the inner cylinder 3 and the longitudinal direction.
In the space between the outer cylinder 2 and the inner cylinder 3 toward the one closed end 19 (the air supply port 10 of the inner cylinder 3, that is, the blower side) (arrow b in the drawing).

Further, the outer cylinder 2 and the inner cylinder 3 are arranged along the partition wall.
The flow b from the other closed end 19 to the one closed end 20 in the space between the outer cylinder 2 and the inner cylinder 3 is a flow b from the other closed end 20 to the one closed end in the space between the outer cylinder 2 and the inner cylinder 3. When the flow goes to 19, a flow (arrow c in the drawing) from the partition wall 9 to the slit 6 of the outer cylinder 2 is generated.

The partition wall 9 generated from the air flow b from the other closed end 20 to the one closed end 19 in the space between the outer cylinder 2 and the inner cylinder 3 and the slit 6 of the outer cylinder 2
In the space c between the outer cylinder 2 and the inner cylinder 3, the flow velocity gradually increases from the other closed end 20 to the one closed end 19 in the space between the outer cylinder 2 and the inner cylinder 3 (c1, c2 in the figure). , C3, c
4) is discharged from the slit 6 of the outer cylinder 2 together with the flow a.

Further, the flow c from the partition wall 9 to the slit 6 of the outer cylinder 2 is, as shown in FIG.
Under the influence of the traveling direction component of the air supplied from the inner cylinder 3, the flow velocity is large at the closed end 18 side of the inner cylinder 3, and the flow velocity is small at the air supply port 10 side (blower side) of the inner cylinder 3. From the flow b along the partition wall 9 so as to compensate for the uneven flow velocity distribution of the flow a flowing from the slit 7 through the flow path 8 to the slit 6 of the outer cylinder 2. Air is also supplied to the blower side of the flow path 8 in which the amount of air blown out from the slit 7 of the inner cylinder 3 is small, and the distribution of the flow velocity becomes uniform at any position from the blower side to the closing end side, Since the rectification by the flow path 8 is also reliably performed, the distribution of the flow direction and the flow velocity of the air blown out from the slit 6 of the outer cylinder 2, that is, the band-shaped air discharged from the blow nozzle 1, becomes uniform. Things.

Further, in the present invention, since the flow path 8 is formed by providing the partition wall 9 in the space formed between the outer cylinder 2 and the inner cylinder 3, The air flow path 8 reaching the slit 6 of the outer cylinder 2 becomes one,
As in the prior art, there are no two air flow paths, and there is no case where the split flow and the merge flow are performed. Therefore, there is no need to balance the air flow.
There is no need to increase the accuracy of the arrangement position of the nozzles, and the manufacturing cost of the blow nozzle 1 can be reduced.

Next, a modified example of the blow nozzle 1 will be described. FIG. 8 shows a first modified example. In this modified example, the position of the slit 7 of the inner cylinder 3 is rotated by 180 degrees with respect to the position of the slit 6 of the outer cylinder 2 so that the outer cylinder 2 and the inner cylinder 3 The partition 9 provided in the space formed between the inner cylinder 3 and the inner cylinder 3 is provided at a position adjacent to the slit 7 of the inner cylinder 3.
A case is shown in which a flow path 8 that makes a half turn around the periphery of is formed.

FIG. 9 shows the state of air flow in the blow nozzle 1 of the first modification.
(This drawing is a developed view in which the flow of air in the blow nozzle 1 can be grasped three-dimensionally).
The air supplied into the inner cylinder 3 and blown out from the slit 7 of the inner cylinder 3 into the flow path 8 passes through the flow path 8 formed between the outer cylinder 2 and the inner cylinder 3, and the slit of the outer cylinder 2 6 (arrow a in the figure) and the space 17 closed by the partition 9 formed between the slit 6 and the partition 9 of the outer cylinder 2, and then the outer cylinder 2 and the inner cylinder 3. Between the outer cylinder 2 and the inner cylinder 3 from the other closed end 20 (closed end 18 side of the inner cylinder 3) in the space between the outer cylinder 2 and the inner cylinder 3 along the partition wall 9 which partitions the space between the inner cylinder 3 and the outer cylinder 2 in the longitudinal direction. One closed end 19 (in the inner cylinder 3) in the space between the inner cylinder 3
(Indicated by an arrow d in the figure) toward the air supply port 10 (ie, the blower side).

Further, the outer cylinder 2 and the inner cylinder 3 are arranged along the partition wall.
The flow d from the other closed end 19 to the one closed end 20 in the space between the outer cylinder 2 and the inner cylinder 3 is a flow d from the other closed end 20 to the one closed end in the space between the outer cylinder 2 and the inner cylinder 3. On the way to 19, a flow (arrow e in the figure) is generated from the partition 9 through the space 17 closed by the partition 9 to the slit 6 of the outer cylinder 2.

The partition wall 9 is closed by the partition wall 9 from the flow d of air flowing from the other closed end 20 to the one closed end 19 in the space between the outer cylinder 2 and the inner cylinder 3. The flow e flowing toward the slit 6 of the outer cylinder 2 through the space 17 is changed from the other closed end 20 to the one closed end 19 in the space between the outer cylinder 2 and the inner cylinder 3. The flow velocity is gradually increased (e1, e2, e3 in the figure), and is discharged from the slit 6 of the outer cylinder 2 together with the flow a.

Further, the slit 6 of the outer cylinder 2 passes from the partition 9 through a space 17 closed by the partition 9.
The flow e toward is similar to the above-described embodiment,
Under the influence of the traveling direction component of the air supplied from the blower 15, the flow velocity is large at the closed end 18 side of the inner cylinder 3, and the flow velocity is small at the air supply port 10 side (blower side) of the inner cylinder 3. A flow a generated from the flow d along the partition wall 9 so as to compensate for an uneven flow velocity distribution of the flow a flowing from the slit 7 of the cylinder 3 to the slit 6 of the outer cylinder 2 through the flow path 8, As a result, air is supplied also to the blower side of the flow path 8 where the amount of air blown out from the slit 7 of the inner cylinder 3 is small,
At any position from the blower side to the closing end side, the distribution of the flow velocity becomes uniform and the flow is rectified reliably by the flow path 8, so that the air blown out from the slit 6 of the outer cylinder 2, that is, the blow nozzle 1 The distribution of the flow direction and the flow velocity of the band-shaped air discharged from the air becomes uniform.

Next, FIG. 10 shows a second modified example, in which a flow path that makes a half turn around the inner cylinder 3 is formed, as in the first modified example. Then, the partition 9 provided in the space formed between the outer cylinder 2 and the inner cylinder 3
Is provided at a position adjacent to the slit 6 of the outer cylinder 2.

In this case, although a space 17 is formed between the slit 7 of the inner cylinder 3 and the partition 9, FIG.
As shown in FIG. 1 (this drawing is a developed view in which the flow of air in the blow nozzle 1 can be captured three-dimensionally), air flows into the space 17 closed by the partition wall 9. As a result, the rectifying effect of the flow path 8 is not impaired by the presence of the space 17 closed by the partition wall 9, and the flow direction and the flow velocity of the air discharged from the blow nozzle 1 in the form of a band. Are uniform.

Further, in the third modification shown in FIG. 12, the position of the slit 7 of the inner cylinder 3 is rotated by 90 degrees with respect to the position of the slit 6 of the outer cylinder 2 so that the outer cylinder 2 and the inner cylinder 3 By providing a partition wall 9 provided in a space formed between the inner cylinder 3 at a position adjacent to the slit 7 of the inner cylinder 3, a flow path 8 that turns around the inner cylinder 3 by three quarters is formed. In this case as well, the flow direction and the flow velocity distribution of the air discharged from the blow nozzle 1 in a strip shape become uniform due to the rectifying effect of the flow path 8 orbiting around the inner cylinder 3.

Although not shown, in the third modified example, the partition 9 provided in the space formed between the outer cylinder 2 and the inner cylinder 3 is inserted into the slit 6 of the outer cylinder 2. It is also possible to provide them at adjacent positions.

As can be seen from the above modification, the positional relationship between the slit 6 of the outer cylinder 2 and the slit of the inner cylinder 3 and the partition 9 can be freely selected. Each position can be determined so that the length of the flow path 8 is optimal for the flow rate of the air discharged from the blow nozzle 1 and the outer cylinder 2 and the inner cylinder 3 are rotatably arranged with respect to each other. In this case, the blow nozzle 1 that can be used for various applications can be provided at low cost.

FIGS. 13 and 14 show another example of the outer cylinder 2 and the inner cylinder 3 which constitute the blow nozzle 1.
The slits 6 formed in the inner cylinder 3 and the slits 7 formed in the inner cylinder 3 are elongated holes (several millimeters in width, dozens in length) formed in a row in the longitudinal direction of the cylindrical body forming the outer cylinder 2 and the inner cylinder 3. Cm)
It shows the case where it is made by.

The slits 6 and 7 formed in the outer cylinder 2 and the inner cylinder 3 constituting the blow nozzle 1 described above
And, in order to maintain the strength of the cylindrical body forming the inner cylinder 3, it is composed of a plurality of holes formed in a line in the longitudinal direction, and a partition having a width of several millimeters to several tens of millimeters is provided between adjacent holes. However, when the strength limitation is solved, one elongated hole continuous from one end side to the other end side of the cylindrical body forming the outer cylinder 2 and the inner cylinder 3 is shown. Slit 6,
Forming 7 is also contemplated.

The outer cylinder 2 and the inner cylinder 3 constituting the blow nozzle 1 of the present invention are preferably arranged concentrically. However, as shown in FIG. The case where the inner cylinder 3 is eccentric with respect to the cylinder 2 (in the figure, the center L of the inner cylinder 3 is eccentric downward with respect to the center K of the outer cylinder 2) is also considered. As in the nozzles (see FIGS. 16 and 17), the split and merge of the air due to the existence of the two flow paths are not performed, so the center L of the inner cylinder 3 is compared with the center K of the outer cylinder 2. Even if the eccentricity is eccentric, it passes through the flow path 8 and
There is no effect on the flow direction and flow velocity of the air discharged from the
Therefore, the arrangement position of the inner cylinder 3 with respect to the outer cylinder 2 only needs to be substantially concentric (substantially concentric), and high accuracy is not required when the inner cylinder 3 is arranged in the outer cylinder 2. The manufacturing cost of the nozzle 1 does not need to be increased, and the maintenance of the blow nozzle 1 can be easily performed.

Next, the results of a comparison test of the performance between the conventional blow nozzle and the blow nozzle of the present invention will be described. In the comparative examples, eight types of cylindrical blow nozzles having slits forming discharge ports in the longitudinal direction were used.

FIGS. 18 to 26 show the configurations and test results of the eight types of comparative examples used in the above-mentioned comparative tests and the blow nozzles of the present invention. From one end, and the other end is a closed end. In each figure, the dashed-dotted arrows indicate the flow of air supplied from the blower, and the solid arrows indicate the flow direction and the flow velocity distribution of the air discharged from the blow nozzle.

Tables 1 to 9 show the eight types of comparative examples used in the above-mentioned comparative test and the positions of the blow nozzles of the present invention at positions directly facing the slits forming the discharge ports, from the closed end side of the slit to the blower side. 4 shows the measurement results of the flow velocity at 10 measurement points provided at equal intervals, and shows the distribution of the flow velocity of the air discharged from the blow nozzle.

Further, the accuracy of the flow velocity in the following eight comparative examples and the description of the blow nozzle of the present invention means the maximum value of the flow velocity of the air discharged from each comparative example and the blow nozzle of the present invention. An intermediate value of the minimum value is obtained, and the ratio of the error between the maximum value and the minimum value when the intermediate value is used as a reference is shown. It is determined whether the distribution of the flow velocity of the air discharged from the blow nozzle is uniform. Provide materials.

Comparative Example 1: This comparative example shows a blow nozzle (see FIG. 18) having the simplest structure composed of a single cylindrical body having a slit formed in the longitudinal direction.
And Table 1.

[0051]

[Table 1]

As shown in FIG. 18 and Table 1, in the blow nozzle of Comparative Example 1, the air flow on the blower side is considered to be affected by the traveling direction component of the air supplied from the blower. Therefore, the distribution of the flow direction of the air discharged from the blow nozzle in the form of a band is not uniform, and the accuracy of the flow velocity is ± 34.3%. Is not even.

Comparative Example 2: In this comparative example, an inner cylinder having a slit formed in the longitudinal direction was disposed in a cylindrical body (an outer cylinder) having a slit formed in the longitudinal direction, and formed in the inner cylinder. By positioning the position of the slit and the position of the slit formed in the outer cylinder at positions different from each other by 180 degrees (directly opposite positions), the flow path formed by the inner peripheral surface of the outer cylinder and the outer peripheral surface of the inner cylinder can be changed. A blow nozzle (see FIG. 19) positioned right and left to discharge air supplied from the blower through the inner cylinder, the inner cylinder slit, and the outer cylinder slit through the left and right flow paths of the inner cylinder. Is shown in FIG. 19 and Table 2. In the blow nozzle of this comparative example, the arrangement position of the inner cylinder is not decentered with respect to the outer cylinder.

[0054]

[Table 2]

As shown in FIG. 19 and Table 2, in the blow nozzle of Comparative Example 2, the air flow on the blower side is considered to be affected by the traveling direction component of the air supplied from the blower. Although the distribution in the flow direction of the air discharged from the blow nozzle in the form of a band is not uniform, the accuracy of the flow velocity is ± 14.7%. It can be said that the uniformity was slightly improved.

COMPARATIVE EXAMPLE 3 In this comparative example, a cylindrical body having a slit formed in the longitudinal direction is vertically divided, and air supplied from the blower side is closed through an upper flow path in the cylindrical body. FIG. 20 shows a blow nozzle (see FIG. 20) in which air is blown from both end sides (closed end side and blower side) of the cylindrical body, and test results are shown in FIG. 20 and Table 3. .

[0057]

[Table 3]

As shown in FIG. 20 and Table 3, in the blow nozzle of Comparative Example 3, the air flow on the blower side and the closing end side is affected by the traveling direction component of the air supplied from the blower. The distribution of the flow direction of the air discharged from the blow nozzle in a band shape is not uniform, and the accuracy of the flow velocity is ± 42.9%. In particular, the flow velocity near the center is large, The distribution of the flow velocity of the air discharged from the blow nozzle in a strip shape is not uniform.

Comparative Example 4: In this comparative example, an inner cylinder is provided in a cylindrical body (outer cylinder) having a slit formed in the longitudinal direction, and air supplied from a blower is supplied through the inner cylinder to form a cylinder. Shows a blow nozzle (see FIG. 21) in which air is blown from the center and both ends (closed end side and blower side) of the tubular body by being guided to the closed end side and the center of the body, and the test results Are shown in FIG. 21 and Table 4.

[0060]

[Table 4]

As shown in FIG. 21 and Table 4, the blow nozzle of Comparative Example 4 can be said to have a uniform distribution in the flow direction of the air discharged from the blow nozzle in a band shape, but the accuracy of the flow velocity is ± 25. In particular, the flow velocity of the air near the center is insufficient, and the distribution of the flow velocity of the air discharged from the blow nozzle in a strip shape is not uniform.

Comparative Example 5 This comparative example shows a blow nozzle (see FIG. 22) in which a baffle plate is disposed on the blower side in a cylindrical body having a slit formed in the longitudinal direction (see FIG. 22).
2 and Table 5.

[0063]

[Table 5]

As shown in FIG. 22 and Table 5, in the blow nozzle of Comparative Example 5, the influence of the traveling direction component of the air supplied from the blower remains on the air flow on the blower side. However, the distribution of the flow direction and the flow velocity of the air discharged from the blow nozzle in a strip shape is not uniform, and the accuracy of the flow velocity is ± 34.5%. In particular, the flow velocity of the air on the blower side is insufficient. Therefore, the distribution of the flow velocity of the air discharged from the blow nozzle in a strip shape is not uniform.

Comparative Example 6 This comparative example shows a blow nozzle (see FIG. 23) in which a short partition plate is disposed on the blower side in a cylindrical body having a slit formed in the longitudinal direction (see FIG. 23). And Table 6.

[0066]

[Table 6]

As shown in FIG. 23 and Table 6, in the blow nozzle of Comparative Example 6, the influence of the traveling direction component of the air supplied from the blower on the air flow between the blower side and the center. It is thought that the flow direction and the distribution of the flow velocity of the air discharged from the blow nozzle in a strip shape are not uniform, and the accuracy of the flow velocity is ± 37.9%. The flow velocity of the air at the end side is insufficient, and the distribution of the flow velocity of the air discharged from the blow nozzle in a strip shape is not uniform.

Comparative Example 7: This comparative example shows a blow nozzle (see FIG. 24) in which a short inner cylinder of punching metal is arranged on the blower side in a cylindrical body having a slit formed in the longitudinal direction (see FIG. 24). Are shown in FIG. 24 and Table 7.

[0069]

[Table 7]

As shown in FIG. 24 and Table 7, the blow nozzle of Comparative Example 7 can be said to have a uniform distribution in the flow direction of the air discharged from the blow nozzle in a band shape, but the accuracy of the flow velocity is ± 34. In particular, the flow velocity of the air at the closed end side is insufficient, and the distribution of the flow velocity of the air discharged from the blow nozzle in a strip shape is not uniform.

COMPARATIVE EXAMPLE 8 In this comparative example, an inner cylinder is provided in a cylindrical body (outer cylinder) having a slit formed in a longitudinal direction, and air supplied from a blower is supplied to the cylindrical body through the inner cylinder. A blow nozzle (see FIG. 25) in which air is blown from the center of the tubular body by guiding only to the central part of the body is shown, and the test results are shown in FIG. 25 and Table 8.

[0072]

[Table 8]

As shown in FIG. 25 and Table 8, the blow nozzle of Comparative Example 8 can be said to have a uniform distribution in the flow direction of the air discharged from the blow nozzle in a strip shape, but the accuracy of the flow velocity is ± 33. In particular, the flow velocity of the air at the closed end side is larger than that of other parts, and the distribution of the flow velocity of the air discharged from the blow nozzle in a strip shape is not uniform.

The present invention shows a blow nozzle (see FIG. 26) in which the flow path from the slit of the inner cylinder to the slit of the outer cylinder makes a full orbit around the inner cylinder. It is shown in Table 9.

[0075]

[Table 9]

As shown in FIG. 26 and Table 9, the blow nozzle of the present invention has a uniform distribution in the flow direction of the air discharged from the blow nozzle in the form of a band, and the accuracy of the flow velocity is ± 3. 0.6%, there was no variation in the flow velocity from the closing end side to the blower side, and the distribution of the flow velocity of the air discharged from the blow nozzle in a band shape was uniform.

As is clear from the above comparative test, the blow nozzle of the present invention has a uniform distribution of the flow direction and the flow velocity of the air discharged from the blow nozzle in a strip shape, and has a simple structure. At the same time, since high accuracy is not required at the time of assembly, reduction in manufacturing cost and maintenance cost can be realized.

Further, at the time of the above-mentioned comparative test, the length of the blow nozzle of the present invention was increased without changing the diameter of the outer cylinder and the inner cylinder (the length of the blow nozzle was 2500 mm). As in the case of the blow nozzle used in the above comparative test, it was confirmed that the distribution of the flow direction and the flow velocity of the air discharged from the blow nozzle in the form of a strip were kept uniform, and as in the conventional blow nozzle, It is not necessary to increase the diameter as the blow nozzle is lengthened, and it is possible to respond by supplying air from one end of the blow nozzle, and it is not necessary to newly form an air supply port.
Blow nozzles of various lengths can be manufactured at low cost.

[0079]

As described in detail above, the present invention has the following effects. That is, while having a simple configuration, the distribution of the flow direction and the flow velocity of the air discharged from the blow nozzle in the form of a band are uniform, and the processing accuracy and assembly accuracy at the time of manufacturing the blow nozzle, and further, at the time of maintenance, High accuracy is not required for assembly accuracy,
The blow nozzle can be manufactured at low cost, and at the same time, the blow nozzle with low maintenance cost and high usability is provided.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a blow nozzle of the present invention.

FIG. 2 is a view taken in the direction of the arrow Y in FIG.

FIG. 3 is a sectional view taken along line X-X 'in FIG.

FIG. 4 is a diagram showing an outer cylinder constituting a blow nozzle.

FIG. 5 is a view showing an inner cylinder constituting a blow nozzle.

FIG. 6 is a developed view showing a flow state in the blow nozzle.

FIG. 7 is a diagram showing a distribution of a flow of air flowing in a blow nozzle.

FIG. 8 is a sectional view showing a first modification of the blow nozzle.

FIG. 9 is a developed view showing a state of flow in the blow nozzle in a first modified example of the blow nozzle.

FIG. 10 is a sectional view showing a second modification of the blow nozzle.

FIG. 11 is a developed view showing a state of flow in a blow nozzle in a second modification of the blow nozzle.

FIG. 12 is a sectional view showing a third modification of the blow nozzle.

FIG. 13 is a view showing another example of the outer cylinder constituting the blow nozzle.

FIG. 14 is a view showing another example of the inner cylinder constituting the blow nozzle.

FIG. 15 is a cross-sectional view showing a case where an outer cylinder and an inner cylinder constituting a blow nozzle are eccentric.

FIG. 16 is a perspective view showing a conventional blow nozzle.

FIG. 17 is a sectional view taken along the line ZZ ′ in FIG. 16;

FIG. 18 is a diagram showing a flow direction and a flow velocity of air in a blow nozzle of Comparative Example 1.

FIG. 19 is a diagram showing a flow direction and a flow velocity of air in a blow nozzle of Comparative Example 2.

FIG. 20 is a diagram showing a flow direction and a flow velocity of air in a blow nozzle of Comparative Example 3.

FIG. 21 is a diagram showing a flow direction and a flow velocity of air in a blow nozzle of Comparative Example 4.

FIG. 22 is a diagram showing a flow direction and a flow velocity of air in a blow nozzle of Comparative Example 5.

FIG. 23 is a view showing a flow direction and a flow velocity of air in a blow nozzle of Comparative Example 6.

FIG. 24 is a diagram showing a flow direction and a flow velocity of air in a blow nozzle of Comparative Example 7.

FIG. 25 is a diagram showing a flow direction and a flow velocity of air in a blow nozzle of Comparative Example 8.

FIG. 26 is a diagram showing a flow direction and a flow velocity of air in a blow nozzle of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Blow nozzle 2 Outer cylinder 3 Inner cylinder 4 Inner peripheral surface of outer cylinder 5 Outer peripheral surface of inner cylinder 6 Slit of outer cylinder 7 Slit of inner cylinder 8 Flow path 9 Partition wall 10 Air supply port 11,12 End cap 13,14 Mounting Member 15 Blower 16 Air supply pipe 17 Space closed by partition 9 18 Closed end on the other end side of inner cylinder 3 19 Closed end on one end side of space formed between outer cylinder 2 and inner cylinder 3 20 Closed end at the other end of the space formed between outer cylinder 2 and inner cylinder 3 21 conventional blow nozzle 22 outer cylinder 23 inner cylinder 24 inner peripheral surface of outer cylinder 25 outer peripheral surface of inner cylinder 26 outer cylinder Slit 27 Inner cylinder slit 28, 29 Left and right flow paths 30 Blower

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3L113 AA02 AB02 AC35 AC47 AC54 AC55 AC56 BA34 DA04 DA11 4F033 AA09 CA04 DA05 EA01 JA01 JA06 LA02 NA01

Claims (6)

[Claims] 1. An outer cylinder 2 having a slit 6 formed in a longitudinal direction, and a slit 7 disposed in the outer cylinder 2 in a longitudinal direction.
Is formed, and the space between the inner peripheral surface 4 of the outer cylinder 2 and the outer peripheral surface 5 of the inner cylinder 3 formed when the inner cylinder 3 is disposed in the outer cylinder 2 is formed. A blow nozzle 1 used as an air flow path 8, wherein an air supply port 1 is provided at one end of the inner cylinder 3.
0, the other end of the inner cylinder 3 forms a closed end 18, and one end and the other end of a space formed between the outer cylinder 2 and the inner cylinder 3 are closed ends 19. , 20 so that the air supplied from the blower 15 via the air supply pipe 16 is supplied to the inside of the inner cylinder 3, the slit 7 of the inner cylinder 3, and the flow path 8.
The blow nozzle 1 configured to be discharged from the slit 6 of the outer cylinder 2 through the outer cylinder 2, the partition formed in the space formed between the outer cylinder 2 and the inner cylinder 3 to partition the space in the longitudinal direction. 9, the slit 6 of the outer cylinder 2 is positioned on one side of the partition 9 with the partition 9 in the middle, and the slit 7 of the inner cylinder 3 is positioned on the other side of the partition 9.
And a space from the slit 7 of the inner cylinder 3 located on the other side of the partition 9 to the slit 6 of the outer cylinder 2 located on one side of the partition is formed as a flow path 8. Blow nozzle. 2. A slit 6 of the outer cylinder 2 is provided on one side of the partition wall 9.
And the slit 7 of the inner cylinder 3 is adjacent to the other side of the partition wall 9 so that the flow path 8 from the slit 7 of the inner cylinder 3 to the slit 6 of the outer cylinder 2 2. The blow nozzle according to claim 1, wherein the blow nozzle is configured to make substantially the entire circumference of the nozzle. 3. The position of the slit 7 of the inner cylinder 3 is set to a position rotated by 180 degrees with respect to the position of the slit 6 of the outer cylinder 2, and the partition wall 9 is adjacent to the slit 6 of the outer cylinder 2. By providing at the position, the flow path 8 from the slit 7 of the inner cylinder 3 to the slit 6 of the outer cylinder 2 is configured to make a half turn around the circumference of the inner cylinder 3. Item 2. The blow nozzle according to Item 1. 4. The position of the slit 7 of the inner cylinder 3 is set to a position rotated by 180 degrees with respect to the position of the slit 6 of the outer cylinder 2, and the partition wall 9 is adjacent to the slit 7 of the inner cylinder 3. By providing at the position, the flow path 8 from the slit 7 of the inner cylinder 3 to the slit 6 of the outer cylinder 2 is configured to make a half turn around the circumference of the inner cylinder 3. Item 2. The blow nozzle according to Item 1. 5. The position of the slit 7 of the inner cylinder 3 is set to a position rotated by an arbitrary angle with respect to the position of the slit 6 of the outer cylinder 2, and the partition 9 is connected to the slit 6 of the outer cylinder 2.
The length of the flow path 8 from the slit 7 of the inner cylinder 3 to the slit 6 of the outer cylinder 2 can be adjusted to an arbitrary length by providing it at a position adjacent to. The blow nozzle according to claim 1, wherein 6. The position of the slit 7 of the inner cylinder 3 is set to a position rotated by an arbitrary angle with respect to the position of the slit 6 of the outer cylinder 2, and the partition wall 9 is moved to the slit 7 of the inner cylinder 3.
The length of the flow path 8 from the slit 7 of the inner cylinder 3 to the slit 6 of the outer cylinder 2 can be adjusted to an arbitrary length by providing it at a position adjacent to. The blow nozzle according to claim 1, wherein