JP6127035B2 - Air blow device - Google Patents

Description

  The present invention relates to an air blowing device that jets air onto a work and blows away residues remaining on the work from the work.

Conventionally, after machining or surface treatment of a workpiece made of a metal material or the like, an air blowing device that blows away residues such as chips remaining in the hole of the workpiece and shot blast shot balls from the workpiece. Has been developed.
An example of such an air blowing device is described in Patent Document 1. The air blow device described in Patent Document 1 is a gun-type air blow device (air blow gun) that jets compressed air by an operator operating a trigger.

Utility model registration No. 3181444

  In the air blow gun described in Patent Document 1, the blow strength and the air blowing position are not always constant by the operator. In other words, depending on the operator, a difference in the amount of blow of the trigger may cause a difference in blow strength, or a difference in the air blowing angle and air blowing position.

  The present invention has been devised in view of the above problems, and an object thereof is to provide an air blowing device that can stably remove residues from a workpiece by air blowing.

(1) In order to achieve the above object, an air blowing device of the present invention is provided on a table on which a work having holes is placed, and the work is placed on the table. A switch that is turned on when pressed by the lower surface of the workpiece , and is provided so as to face the hole of the workpiece placed on the table. When the switch is pressed and turned on , air is supplied to the hole. And an air nozzle that ejects air.

(2) The workpiece includes a shaft-shaped small-diameter portion, a large-diameter portion provided to protrude in a radial direction on a peripheral surface of the small-diameter portion, and the hole extending in the axial direction from an end portion of the small-diameter portion. The table includes a placement portion on which the large diameter portion is placed, and an accommodation space for accommodating at least a part of the small diameter portion in a state where the large diameter portion is placed on the placement portion. However, it is preferable that the switch is provided in the mounting portion and is pressed by the lower surface of the large diameter portion.

  (3) A bottom wall is formed below the housing space at a location excluding the insertion portion of the air nozzle. With the work placed on the table, a lower end of the work and a bottom wall of the housing space It is preferable that the depth dimension of the accommodation space is set so that a clearance is formed between the two.

(4) In the state where the switch is not pressed , the air nozzle is in a retracted position below the lower end of the work when placed on the table, while in the state where the switch is pressed , It is preferable that a nozzle position setting unit is provided that sets the air nozzle above the retracted position and as an air injection position in the accommodation space.

(5) A cylindrical member whose internal space communicates with the housing space, a discharge member that communicates with the internal space of the cylindrical member and is inclined downward toward the outside of the cylindrical member, and an outlet of the discharge member It is preferable to provide a receiving member.
(6) It is preferable that the table is provided with a workpiece positioning guide for positioning the workpiece with respect to the air nozzle.

According to the air blow device of the present invention, when a workpiece is placed on the table, the switch is pressed by the lower surface of the workpiece to be turned on, and air is injected from the air nozzle into the hole of the workpiece placed on the table. Therefore, the air injection amount and the position and direction of the air injection with respect to the work are constant, and the deposits can be removed from the work by air blowing more stably than before.

It is a typical perspective view which shows the structure of the air blow apparatus as one Embodiment of this invention, (a) is the whole figure of the air blow apparatus seen from the front side, (b) is the lower part (leg part, chute | shoot) of an air blow apparatus , Receiving tray and base portion) viewed from the back. It is a schematic diagram which shows the structure of the air blow apparatus as one Embodiment of this invention, (a) is A1-A1 sectional drawing of FIG.2 (b), (b) is a top view. It is typical sectional drawing which shows the partial structure and operation | movement of the air blow apparatus as one Embodiment of this invention, (a) is a figure which shows the state just before a workpiece | work is mounted in the table of an air blow apparatus, (b) is It is a figure which shows the state in which the workpiece | work was mounted in the table of the air blower. It is a typical longitudinal section showing the composition of the fixed pulley as a work concerning one embodiment of the present invention.

  Embodiments of the present invention will be described below with reference to the drawings. Note that the embodiment described below is merely an example, and there is no intention to exclude various modifications and technical applications that are not explicitly described in the following embodiment. The configurations of the following embodiments can be implemented with various modifications without departing from the spirit thereof.

[1. Work configuration]
A workpiece according to an embodiment of the present invention is a fixed pulley constituting a belt type continuously variable transmission (hereinafter also referred to as CVT).
The CVT and fixed pulley will be briefly described. The CVT has a primary pulley connected to the input shaft, a secondary pulley connected to the output shaft, and a belt wound around these pulleys, and each pulley is integrated with a shaft (input shaft or output shaft). The fixed pulley formed in this way and a movable pulley that is movably provided in the axial direction of the shaft are arranged to face each other, and the belt is wound around a V-shaped groove formed by the fixed pulley and the movable pulley. By changing the distance between the movable pulley and the fixed pulley by moving the movable pulley in the axial direction, the groove width of the V-shaped groove increases and decreases, and the winding diameter of the belt around the pulley is adjusted. From the primary pulley to the secondary pulley The power transmission ratio, that is, the gear ratio changes.

  A fixed pulley (hereinafter also referred to as a workpiece) 1 is configured as shown in FIG. 4, and projects in a radial direction from a shaft (shaft-shaped small diameter portion) 11 and an intermediate portion near the end portion 11 b of the shaft 11. And a disk-shaped pulley body (large diameter portion) 12. Reference numeral 12a denotes a sheave surface, which constitutes a V-shaped groove around which the belt (not shown) is wound together with the sheave surface 32a of the pulley body 32 of the facing movable pulley 3 indicated by a two-dot chain line. Further, a step portion 12 c is provided between the rear surface 12 b of the sheave surface 12 a of the pulley body 12 and the shaft 11.

  The shaft 11 is provided with an oil passage 13 that opens at one end 11a and extends in the axial direction, and an oil passage (hole) 14 that opens at the other end 11b and extends in the axial direction. These oil passages 13 and 14 constitute a hydraulic circuit for controlling the axial position of the movable pulley 3 (that is, the distance between the fixed pulley 1 and the movable pulley 3 and the gear ratio).

  The manufacturing process of the workpiece 1 includes a cutting process and a surface treatment process by shot blasting, as well as an air blowing process. In the cutting process, cutting waste may adhere to or remain in the hole 14 of the work 1. In the surface treatment process, particles (hereinafter also referred to as shot balls) collided with the work 1 during shot blasting are holes in the work 1. 14 may adhere and remain. For this reason, the manufacturing process of the work 1 includes an air blowing process for removing residues such as cutting chips and shot balls from the work 1 by air injection (hereinafter also referred to as air blowing) as a subsequent process of the cutting process or the surface treatment process. Is provided.

[2. Configuration of air blow device]
An air blow process is performed by the air blow apparatus 2 as one Embodiment of this invention shown in FIGS. 1-3. Hereinafter, the configuration of the air blowing device 2 will be described with reference to FIGS. In addition, the broken line in FIG. 3 is a signal line, and a dashed-dotted line shows the flow of air.
The air blow device 2 is of a self-supporting type, and includes a table 21 on which the workpiece 1 is placed, a base member 23 for making the air blow device 2 stand on the ground such as a floor surface, and the table 21 and the base member 23. And an air nozzle 24 that blows air on the work 1 placed on the table 21. As will be described later, the leg portion 22 is a cylindrical member according to the present invention, and the deposits shaken off from the work 1 by air blow are collected through the internal space.
Hereinafter, the table 21, the leg part 22, the base member 23, and the air nozzle 24 will be further described.

[2-1. table]
The center of the upper surface of the table 21 constitutes a placement portion 21a on which the pulley body 12 of the workpiece 1 is placed with the sheave surface 12a facing upward. The mounting portion 21a has a housing recess 21b which is a shallow annular recess, and the housing recess 21b is formed on a back surface (hereinafter also referred to as a mounting surface) 12b of the sheave surface 12a of the workpiece 1. The formed step portion 12c is accommodated.
The table 21 is provided with a concave portion (accommodating space) 21c that is a cylindrical space having a smaller diameter and deeper than the accommodating recess 21b below the accommodating recess 21b and coaxially with the accommodating recess 21b. The concave portion 21c accommodates a shaft lower portion 11c which is lower than the pulley body 12 of the shaft 11 when the work 1 is set on the table 21.
As shown in FIG. 3B, the depth dimension dt of the recess 21c is set to a dimension obtained by adding a predetermined dimension dc to the axial dimension ds of the shaft lower part 11c (dt = ds + dc). When 1 is set on the table 21, a clearance of a predetermined dimension dc is formed between the shaft lower portion 11c and the bottom wall 21f that defines the recess 21c. The predetermined dimension dc is set to be larger than the expected thickness dimension da of the deposit 3 made of residues such as cutting scraps and shot balls swung away from the work 1 during air blowing. (Dc> da). By providing the clearance of the predetermined dimension dc in this way, the placement surface 12b of the workpiece 1 can be grounded to the table 21 before the shaft lower portion 11c comes into contact with the deposit 3, and the workpiece 1 can be stably placed on the table 21. It can be set to.

Further, on the mounting portion 21a of the table 21, the workpiece 1 is positioned on the outer periphery thereof (in other words, the workpiece 1 is set at a set position where the shaft lower portion 11c is accommodated in the recess 21c. A workpiece positioning guide 27 which is an arcuate wall surface (for positioning) is erected (not shown in FIG. 3), and a limit switch 21e is provided between the workpiece positioning guide 27 and the accommodation recess 21b. Yes.
The limit switch 21e controls the operation of the air nozzle 24 as will be described later. The limit switch 21e is urged by an urging means (not shown). As shown in FIG. 3A, the limit switch 21e protrudes from the placement portion 21a when the workpiece 1 is not placed on the placement portion 21a. When the workpiece 1 is placed on the placement portion 21a as shown in FIG. 3B, the lower surface of the workpiece 1 against the urging force of the urging means (specifically, the pulley main body 12). And is turned on (outputs an on signal).

  Here, the inner wall surface of the workpiece positioning guide 27 is configured as a wall surface along the vertical direction, but the workpiece 1 is guided to the set position so that the inner wall surface extends outward and upward. You may do it.

[2-2. Air nozzle]
The air nozzle 24 is disposed in the internal space 22a of the leg portion 22, is attached to the tip of the drive shaft 24b of the solenoid actuator (nozzle position setting means) 24a, and is supplied with air from an air supply source 24c. . The solenoid actuator 24a (and thus the air nozzle 24) is supported on the inner wall surface of the leg portion 22 or the lower surface of the table 21 by support means (not shown).
The solenoid actuator 24a and the air supply source 24c are electrically connected to the limit switch 21e.
When the solenoid actuator 24a does not receive an ON signal from the limit switch 21e, as shown in FIG. 3A, the drive shaft 24b is retracted. As a result, the air nozzle 24 has a bottom portion of the recess 21c. It will be in a standby state in the retreat position which retreats in the through hole (air nozzle insertion part) 21d which is drilled in 21f and penetrates to the bottom surface of the table 21.
The through hole 21d is set to have a smaller diameter than the shaft lower portion 11c of the workpiece 1, and therefore the shaft lower portion 11c does not enter the through hole 21d. When the workpiece 1 is placed on the table 21, the limit switch 21 e is still in the off state, and therefore the air nozzle 21 is retracted in the through hole 21 d, so that the shaft lower portion 11 c and the air nozzle 21 being inserted into the recess 21 Contact with the tip is prevented, and the air nozzle 21 does not obstruct the placement of the work 1 on the table 21.
On the other hand, when the solenoid actuator 24a receives an ON signal from the limit switch 21e, the drive shaft 24b extends as shown in FIG. 3B. As a result, the air injection that is the tip of the air nozzle 24 is performed. The portion enters the recess 21 c and further into the oil passage 14 of the work 1, and becomes an air injection position where air can be injected into the oil passage 14.
Further, the air supply source 24c supplies air to the air nozzle 24 when receiving an ON signal from the limit switch 21e.

[2-3. leg]
The leg portion 22 is a cylindrical body having an internal space 22a having a quadrilateral cross section (horizontal cross section), and is positioned so as to surround the recess 21c and the through hole 21d of the table 1 in plan view, and these recesses 21c. And provided vertically below the through hole 21d. That is, the leg portion 22 is attached to the lower surface of the table 1 so that the internal space 22a communicates with the concave portion 21c and the through hole 21d.
A plate-like inclined member 22b is provided below the internal space 22a so as to partition the internal space 22a vertically. An opening 22c is provided in the lower portion of the wall surface of the leg portion 22 that defines the internal space 22a, and the lower end of the inclined member 22b is connected to the lower edge of the opening 22c. Further, a hollow chute 25 is attached to the outside of the opening 22c so as to be inclined downward toward the outside. The chute 25 is a cylindrical body having a rectangular cross section here, and protrudes from the opening 22c so that its bottom wall 25a is continuous with the lower edge of the opening 22c and the lower end of the inclined member 22b. The inclination angle of the bottom wall 25a coincides with the inclination angle of the inclined member 22b or is steeply inclined below the inclined member 22b.
With such a configuration, residues such as shot balls that have been shaken off from the oil passage 14 of the work 1 by air blow fall, and the recesses 21c and the through holes 21d of the table 21 and the internal space 22a of the legs 22 are formed in this manner. After passing in order and falling on the inclined member 22b, the inclined member 22b and the bottom wall 25a of the chute 25 are slid down and discharged to the outside.
That is, the discharge member of the present invention is constituted by the inclined member 22b and the bottom wall 25a of the chute 25.

[2-4. Base member]
As described above, the base member 23 is for grounding on the floor surface or the like to make the air blowing device 2 self-supporting, and has a sufficient weight and a ground contact area that allows the air blowing device 2 to be stably self-supporting. A wheel may be provided at the bottom of the base member 23 so that the installation position of the air blowing device 2 can be easily changed.
Further, a tray (receiving member) 26 is easily attached to the base member 23 below the discharge port 25b at the lower end of the chute 25, and shot balls and the like discharged from the discharge port 25b are collected by the tray 26. Like to do. Here, the receiving tray 26 has a relatively shallow box shape with the bottom opened upward. Note that the tray 26 may simply be placed on the base member 23.

[3. Action / Effect]
Hereinafter, with reference to FIG. 3, operation | movement of the air blow apparatus 2 as one Embodiment of this invention is demonstrated.
As shown by an arrow B1 in FIG. 3A, the shaft lower portion 11c of the workpiece 1 in a posture in which the back surface (mounting surface) 12b of the pulley main body 12 faces downward enters the recess 21 of the table 21. To lower. At this time, since the workpiece 1 is not placed on the table 21, the limit switch 21e is in an off state in which the workpiece 1 is not yet pressed, so that the solenoid actuator 24a is in a retracted state and the air nozzle 24 is retracted into the through hole 21d. In the retracted position.

Therefore, as shown in FIG. 3B, the shaft lower portion 11c can be accommodated in the concave portion 21 without being obstructed by the air nozzle 24. As a result, the work 1 is properly placed on the placement portion 21a of the table 21. Can be placed in a posture. When the limit switch 21e is pressed by the back surface 12b of the pulley body 12 of the workpiece 1 and is turned on, an on signal is transmitted from the limit switch 21e to the solenoid actuator 24a and the air supply source 24c.
The solenoid actuator 24a extends the drive shaft 24b when receiving the ON signal from the limit switch 21e. As a result, the air nozzle 24 attached to the drive shaft 24b allows the air ejection portion, which is the tip of the air nozzle 24, to enter the oil passage 14 of the shaft lower portion 11c in the concave portion 21c and to eject air into the oil passage 14. It becomes a spout position.
The air supply source 24c starts supplying air to the air nozzle 24 when receiving an ON signal from the limit switch 21e.
That is, as shown in FIG. 3B, when the workpiece 1 is normally set on the mounting surface 21 a of the table 21, the limit switch 21 e is turned on by the workpiece 1 and the air nozzle 24 inserted into the oil passage 14. Then, air is injected into the oil passage 14, and residues such as shot balls adhering to the inner wall surface of the oil passage 14 are blown away.

The shot ball blown off is sent to the tray 26 through the recess 21c, the through hole 21d, the internal space 22a of the leg 22 and the chute 25, and is collected by the tray 26.
Thus, since the residue blown off by the air blow is collected by the tray 26, it is possible to prevent the residue from being scattered around by the air blow.
Further, when the limit switch 21e is pressed by the work 1 placed in a normal posture on the table 21, air is discharged from the air nozzle 24 inserted into the oil passage 14 of the work 1 with a constant angle and a constant injection amount. Since the jetting is performed, the residue can be removed from the workpiece 1 stably without variation as compared with a gun-type air blowing device operated by an operator's operation.

Furthermore, since the limit switch 21e is pressed by the back surface 12b of the pulley body 12 of the workpiece 1, for example, a configuration in which the limit switch 21e is pressed by the shaft lower portion 11c of the workpiece 1 (that is, the recess 21c in which the shaft lower portion 11c is accommodated). Compared to the configuration in which the limit switch 21e is provided on the bottom wall 21f), the pressing of the limit switch 21e by the workpiece 1 can be performed stably.
That is, when the work 1 is set on the table 21, it is expected that shot balls spill out from the oil passage 14 in the shaft lower portion 11c facing downward, and the shot balls that fall out are accommodated in the shaft lower portion 11c. There is a high possibility of remaining on the bottom wall 21f of the recess 21c which is a space. Therefore, when the limit switch 21e is provided on the bottom wall 21f of the recess 21c, the shot ball remaining on the bottom wall 21f of the recess 21c prevents the limit switch from being pressed (ON) by the lower shaft portion 11c. Then, there is a high possibility that the shot ball enters the gap between the limit switch and the table switch mounting portion where the limit switch can be moved back and forth, making it difficult to press (turn on) the limit switch itself. On the other hand, in this embodiment, the limit switch 21e is provided not on the recess 21c but on the mounting surface 21a which is the upper surface of the table 21, and is pushed by the pulley body 12, so that the shot spilled from the workpiece 1 described above. There is a low possibility that the malfunction of the limit switch 21e is caused by the balls.

[4. Others]
(1) In the above embodiment, the solenoid actuator is used as the nozzle position setting means for setting the position of the air nozzle 24. However, the nozzle position setting means is not limited to the solenoid actuator, and various actuators can be used. A mechanism including an air cylinder, an electric motor, or the like can also be used.
Furthermore, the structure which fixes the air nozzle 24 to the air injection position where the front-end | tip is inserted in the oil path 14 is also possible, without providing a nozzle position setting means. When the hole provided in the workpiece 1 is larger than the air nozzle 24, the workpiece 1 is set on the table 21 even when the air nozzle 24 is in the air injection position (the position where the tip of the air nozzle 24 is inserted into the hole). In addition, since the possibility that the workpiece 1 interferes with the air nozzle 24 is low, a configuration in which the air nozzle 24 is fixed becomes possible. In this case, since the nozzle position setting means is not provided, the configuration of the air blowing device can be simplified.
Further, the air injection position of the air nozzle 24 is not necessarily limited to a position where the tip of the air nozzle 24 is inserted into the oil passage 14, and may be a position where air can be blown into a hole provided in the workpiece 1. For example, when the nozzle position setting means is provided, it may be a position closer to the oil passage 14 than the retracted position.

(2) In the above embodiment, the example using the fixed pulley 1 shown in FIG. 4 as the work has been described. However, the work is not limited to the fixed pulley 1, and the movable pulley 3 is used as a work to air blow the movable pulley 3. An air blow device may be applied. The movable pulley 3 includes a pulley body 32, a boss portion 31 having a smaller diameter than the pulley body 32, and an insertion portion 33 formed inside the pulley body 32 and the boss portion 31 and inserted through the shaft portion 11 of the fixed pulley 1. When the movable pulley 3 is a workpiece, the pulley body 32 corresponds to the large diameter portion of the present invention, the boss portion 31 corresponds to the small diameter portion of the present invention, and the insertion portion 33 corresponds to the hole of the present invention. It corresponds to.
Further, the workpiece is not limited to one having a large diameter portion and a small diameter portion as long as it has a hole, and may be one having a hole on one surface of a rectangular parallelepiped, for example. In this case, since the work does not have a small-diameter portion, the concave portion 21c which is an accommodation space for accommodating the small-diameter portion in the table is not necessary.

(3) In the above embodiment, the accommodation space is configured by the recess 21c. However, the accommodation space may be formed as a through hole that penetrates the table 21 (even if the recess 21c directly penetrates the table 21). good). Such a configuration is equivalent to one in which the concave portion (accommodating space) 21c and the through hole 21d are integrally formed, and therefore it is not necessary to provide a through hole separately from the accommodating space.
(4) The air nozzle 24 may be retracted to the internal space 22 a of the leg portion 22.

1 Fixed pulley (workpiece)
2 Air blow device 3 Movable pulley 11 Shaft (shaft-shaped small diameter part)
14 Oil passage (work hole)
11c shaft lower part 12 pulley body (large diameter part)
21 Table 21a Placement part 21c Recessed part (accommodating space)
21e Limit switch 22 Leg (tubular member)
22a Internal space 22b Inclined member 24 Air nozzle 24a Solenoid actuator (nozzle position setting means)
25 chute 25a chute bottom wall 26 saucer (receiving member)

Claims (6)

A table on which a workpiece having a hole is placed;
A switch provided on the table and turned on when pressed by the lower surface of the workpiece when the workpiece is placed on the table;
An air nozzle that is provided so as to face the hole of the work placed on the table and that blows air into the hole when the switch is pressed and turned on . Air blow device. The workpiece has a shaft-shaped small diameter portion, a large diameter portion provided to protrude in a radial direction on a peripheral surface of the small diameter portion, and the hole extending in the axial direction from an end portion of the small diameter portion,
The table includes a placement portion on which the large diameter portion is placed, and an accommodation space that accommodates at least a part of the small diameter portion in a state where the large diameter portion is placed on the placement portion. ,
The air blow device according to claim 1, wherein the switch is provided in the mounting portion and is pressed by a lower surface of the large diameter portion. Below the housing space, a bottom wall is formed at a location excluding the insertion portion of the air nozzle,
The depth dimension of the accommodation space is set so that a clearance is formed between a lower end of the work and the bottom wall in a state where the work is placed on the table. Item 3. The air blow device according to Item 2. When the switch is not pressed , the air nozzle is set to a retracted position that is below the lower end of the workpiece when placed on the table, while when the switch is pressed , the air nozzle is The air blower according to claim 2 or 3, further comprising a nozzle position setting unit that is located above the retracted position and is an air injection position in the accommodation space. A cylindrical member whose internal space communicates with the accommodation space;
A discharge member that communicates with the internal space of the tubular member and is inclined downward toward the outside of the tubular member;
A receiving member provided at an outlet of the discharge member;
The air blower according to any one of claims 2 to 4, characterized by comprising: The air blowing device according to any one of claims 1 to 5, wherein the table is provided with a work positioning guide for positioning the work with respect to the air nozzle.

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