JP2006116575A - Air supplying apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air supplying apparatus having simple constitution with which the air can be supplied with no useless and selectively used as an air cylinder mechanism and a vacuum mechanism without needing a troublesome change-over operation. <P>SOLUTION: In an air passage 3 connected with an air supplying source, an opening hole 4 for hydraulic and air pressure in order to supply the air for working a hydraulic mechanism and an opening hole 5 for vacuum in order to supply the air into a vacuum mechanism, are arranged. Further, a spool 6 for opening/closing the opening hole 4 for hydraulic and air pressure and an opening/closing member 7 for opening/closing the opening hole 5 for vacuum, are disposed in the air passage 3 so as to be freely shifted as slide-contacting state by mutually linking. This air supplying apparatus is constituted, with which in the case of positioning the spool 6 at opening the opening hole 4 for hydraulic and air pressure, the opening hole 5 for vacuum is closed, and in the case of positioning the spool 6 at closing the opening hole 4 for hydraulic and air pressure, the opening hole 5 for vacuum is opened. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an air supply device provided in an air riveter or the like that allows a pin separated after rivet fastening to be recovered using negative pressure.

  The configuration of this type of air riveter is shown, for example, in FIG. 5 (see, for example, Patent Document 1). In this example, a hydraulic mechanism 52 for sliding a chuck mechanism 51 capable of gripping a rivet pin P back and forth, an air cylinder mechanism 53 for operating the hydraulic mechanism 52, and a pin P separated after rivet fastening. A vacuum mechanism 54 that uses air pressure (negative pressure) for suction, a pin storage container 55 that stores the pin P, and an air cylinder mechanism 53 and a vacuum mechanism 54 for supplying air to the vacuum mechanism 54 And an air supply device 56 having a valve mechanism.

  An air supply source (not shown) is connected to the air supply device 56 so that air can be supplied to both the air cylinder mechanism 53 and the vacuum mechanism 54. When the trigger switch 57 is pulled, Air is supplied to the air cylinder mechanism 53 to actuate the hydraulic mechanism 52, and the rivet pin P gripped by the chuck mechanism 51 is pulled to perform caulking. After the caulking is completed, the vacuum mechanism 54 The separated pin P is collected in the pin accommodating container 55 by the negative pressure generated in step (b).

  However, in the conventional air riveter as described above, when the trigger switch 57 is pulled, the spool constituting the valve mechanism moves in the air passage of the air supply device 56 and air is supplied to the air cylinder mechanism 53. However, air is also supplied to the vacuum mechanism 54 at that time. Therefore, there is a problem that a sufficient oil pressure cannot be obtained because a loss occurs in the air pressure for operating the air cylinder mechanism 53. In FIG. 5, 58 is an air piston, 59 is a piston rod, and 60 is an oil chamber.

  Thus, in order to solve such a problem, a configuration has been proposed in which air supply to the vacuum mechanism can be arbitrarily stopped and supplied (see, for example, Patent Document 2). For example, as shown in FIG. 6, the seal member 63 is moved to the first position with respect to the nozzle body 62 by moving the nozzle body 62 relative to the switching body 61 in one axial direction. The air is divided into an air supply device from the air supply source and flows into the throttle portion 65 through the hole 64, while the nozzle body 62 is relatively axially opposite to the switching body 61. The seal portion 63 is positioned at the second position with respect to the nozzle body 62 by moving to the position of the nozzle body 62 so that the inflow of air to the throttle portion 65 in the cylinder 64 is blocked. Reference numeral 66 denotes a pin container.

JP 2000-237838 A JP 2003-136178 A

  As described above, by operating the switching body 61 to arbitrarily supply and stop the air to the vacuum mechanism, it is possible to prevent the loss of air pressure, but the number of parts increases. In addition, since high processing accuracy and assembly accuracy are required for the seal portion 63 of the switching body 61, the peripheral portion thereof, the interlocking portion, and the like, there is a problem that the cost is high, and sufficient durability is ensured. It's not easy.

  The present invention has been made in view of such circumstances, and selectively supplies air to the air cylinder mechanism and the vacuum mechanism without waste without requiring high machining accuracy and assembly accuracy for the peripheral portion and the interlocking portion of the vacuum mechanism. It is an object of the present invention to provide an air supply device that can be configured simply.

(1) The air supply device of the present invention includes a hydraulic mechanism 1 that operates by air pressure to slide a chuck mechanism that can grip a rivet pin back and forth, and an air that collects the pin separated after the rivet is fastened. A vacuum mechanism 2 for suction using pressure, and an air supply device for supplying air to the vacuum mechanism 2;
An oil / pneumatic pressure opening 4 for supplying air for operating the hydraulic mechanism 1 to an air passage 3 connected to an air supply source, and a vacuum opening 5 for supplying air to the vacuum mechanism 2 And a spool 6 for opening and closing the hydraulic / pneumatic opening 4 and an opening / closing member 7 for opening and closing the vacuum opening 5 are slidably movable in conjunction with each other. When disposed in the air passage 3 and the spool 6 is in a position to open the hydraulic / pneumatic opening 4, the vacuum opening 5 is closed, and the spool 6 is in a position to close the hydraulic / pneumatic opening 4. In some cases, the vacuum opening 5 is configured to be opened.

  According to such a configuration, when the hydraulic mechanism 1 is operated by moving the spool 6 to the position where the hydraulic / pneumatic pressure opening 4 is opened (by operating the trigger switch when performing caulking), the opening / closing member 7 is used for vacuum. Since the opening 5 is closed, the hydraulic mechanism 1 can be operated without loss of air pressure. On the other hand, when the hydraulic / pneumatic pressure opening 4 is closed by the spool 6 (after the caulking process is finished and the trigger switch is released), the opening / closing member 7 moves in conjunction with the opening of the vacuum 5 so that the air pressure is lost. The vacuum mechanism 2 can be activated. Since such movement of the opening / closing member 7 moves in conjunction with the movement of the spool 6, it is automatically performed without requiring any operation from the outside, so that loss of air pressure can be reliably prevented. .

(2) The opening / closing member 7 is a sleeve having a large-diameter portion 7a and a small-diameter portion 7c having an opening 7b. When the spool 6 is in a position to open the hydraulic / pneumatic opening 4, the diameter While the vacuum opening 5 is closed by the large portion 7a, when the spool 6 is in a position to close the hydraulic / pneumatic pressure opening 4, the opening 7b of the small diameter portion 7c is communicated with the vacuum opening 5. It may be.

  If it does in this way, only the single component which only inserts the sleeve 7 which has the large diameter part 7a and the small diameter part 7c which has the opening 7b in the existing air path 3 so that sliding movement is possible will be added. As a simple configuration, an air supply device without air loss can be provided. In such an air supply device, it is only necessary to insert the sleeve 7 into the air passage 3 so as to be slidably movable. In particular, high processing accuracy and assembly accuracy are not required, and the device can be provided at low cost.

  According to the air supply device of the present invention, when the hydraulic mechanism is operated by moving the spool to the position where the hydraulic / pneumatic opening is opened, the opening for the vacuum is closed by the opening / closing member, so that the hydraulic mechanism operates without loss of air pressure. And can be caulked efficiently. On the other hand, when the hydraulic / pneumatic pressure opening is closed by the spool, the opening / closing member moves and the vacuum opening is opened, so that the vacuum mechanism can be operated without loss of air pressure, and the pins can be efficiently recovered. Can do. In addition, since the movement of the opening / closing member is interlocked with the movement of the spool and is automatically performed without any operation from the outside, loss of air pressure can be reliably prevented.

Hereinafter, an air supply device (hereinafter referred to as a spool unit) according to the best mode for carrying out the present invention will be described in detail with reference to the drawings.
The spool unit is provided in an air riveter AR as shown in FIGS. 3A to 3C and FIG. 4, for example. The air riveter AR uses a hydraulic mechanism 1 that operates by air pressure to slide a chuck mechanism 11 that can grip a rivet pin, and uses air pressure to collect a pin that has been separated after the rivet is fastened. And the spool unit SU is mounted on the cylinder cup 12, and after the air switch 13 is turned on and air is supplied into the spool unit SU, the trigger switch 14 is pulled ( When the operation is turned on, air is supplied only to the air cylinder chamber 15 in the cylinder cup 12 and the hydraulic mechanism 1 is operated. When the pulling operation of the trigger switch 14 is released (off operation), air is supplied only to the vacuum mechanism 2. Configured to be.

  1A and 1B are cross-sectional views of the spool unit SU (corresponding to arrows AA in FIG. 2B). FIG. 1A is a state where the air switch 13 is on and the trigger switch 14 is off. b) shows a state in which the air switch 13 is on and the trigger switch 14 is on. 2A is a plan view of the spool unit SU, FIG. 2B is a side view, and FIG. 2C is a longitudinal sectional view. In FIGS. 1A and 1B, reference numeral 3 denotes an air passage formed in the casing 16 of the spool unit SU, which is connected to an air supply source (not shown) via an air switch 13. 4 is a hydraulic / pneumatic pressure opening for supplying air for operating the hydraulic mechanism 1 to the air cylinder chamber 15, 5 is a vacuum opening for supplying air to the vacuum mechanism 2, and 6 is for opening / closing the hydraulic / pneumatic opening 4. A spool 7 is a sleeve for opening and closing the vacuum opening 5. The casing 16 is formed by integrating the first casing 161 and the second casing 162, the air switch 13 is connected to the end of the first casing 161, and the end of the second casing 162 is blocked by the plug body 17. Has been.

  The spool 6 and the sleeve 7 are fitted in the air passage 3 so as to be slidably movable in conjunction with each other. The spool 6 is slidably movable in cylinder chambers having different inner diameters of the air passage 3. There are two pistons 6a and 6b having different outer diameters, and a through hole 6c is formed through the shaft center. On the other hand, the sleeve 7 has a large-diameter portion 7a and a small-diameter portion 7b having an opening 7c. The large-diameter portion 7a is in sliding contact with the wall surface of the air passage 3 in which the vacuum opening 5 is formed. The vacuum opening 5 is opened and closed.

  When the air switch 13 is turned on (the trigger switch 14 is turned off), air is supplied into the air passage 3 as shown in FIG. Air is introduced into the void 18 through the through-hole 6c, and the spool 6 moves to the left end due to the pressure difference (area difference) received by the two pistons 6a, 6b having different outer diameters. In this state, the hydraulic / pneumatic opening 4 is between the two pistons 6a and 6b of the spool 6 and is closed with respect to the air source, while the vacuum opening 5 is opened. An opening h opened between the pistons 6a and 6b is opened in the casing 16 and communicates with the air cylinder chamber 15, and a plurality of openings opened to the atmosphere are formed in the upper portion of the air cylinder chamber 15. Since the small hole is opened, air is introduced into the air cylinder chamber 15 from the opening h and the pressure is greatly reduced and then discharged to the atmosphere. For example, a muffler such as an exhaust gas muffler of a car Buffer function is demonstrated.

  On the other hand, the large-diameter portion 7a of the sleeve 7 is on the left side of the vacuum opening 5, and the inside of the vacuum opening 5 opens toward the gap formed between the small-diameter portion 7b and the small diameter thereof. The opening 7c formed in the portion 7b communicates, and the outside of the vacuum opening 5 is a straight attached to the second casing 162 via a gap formed between the first casing 161 and the second casing 162. Since it communicates with the valve 19, air is supplied only to the vacuum mechanism 2 via the urethane hose 20 connected to the straight valve 19.

  When the trigger switch 14 is turned on, the valve sleeve 21 is released to the atmosphere, so that the pressure in the void 18 connected to the valve sleeve 21 via the urethane hose 22 decreases, as shown in FIG. Then, the spool 6 and the sleeve 7 move to the right side, the supply of air to the vacuum mechanism 2 is stopped, the air is supplied only to the air cylinder chamber 15 in the cylinder cup 12, the hydraulic mechanism 1 is operated, and the rivet The chuck mechanism 11 holding the pin is moved backward to perform the caulking process.

  More specifically, the vacuum opening 5 is closed in close contact with the large-diameter portion 7a of the sleeve 7, while the piston 6a of the spool 6 is in close contact with the wall surface w as shown in FIG. Since the interlocking state of h is interrupted and moved to a position where the hydraulic / pneumatic opening 4 is opened, air is supplied to the hydraulic / pneumatic opening 4 from the opening 7 c formed in the small diameter portion 7 b of the sleeve 7. An air piston pipe 23 is connected to the hydraulic / pneumatic opening 4 and air is supplied from the lower end opening to the bottom of the air cylinder chamber 15 (see FIG. 4), whereby the air piston 24 moves upward. Then, the oil in the oil chamber 26 is supplied to the oil cylinder 30 by the piston rod 25 integrated with the air piston 24, so that the oil piston 31 is moved backward, and the chuck mechanism 11 is moved backward as described above. Caulking is performed. In the present embodiment, the oil cylinder 30 and the oil piston 31 constitute the hydraulic mechanism 1.

  2A, 2B, and 2C, reference numeral 27 denotes a urethane hose that communicates with the vacuum opening 5, and a connector 28 provided on the upper portion is connected to the main body frame 29 (see FIG. 2). 4), the oil piston 31 is connected to the rear portion of the oil cylinder 30 and is returned to the initial position by air pressure. That is, the trigger switch 14 is turned on to supply the oil in the oil chamber 26 to the front portion of the oil cylinder 30 so that the oil piston 29 is retracted, and after the caulking process as described above, the trigger switch When 14 is turned off, air is supplied to the rear portion of the oil cylinder 30 and the oil piston 31 returns to the initial position. Thus, since the oil piston 31 is returned to the initial position by air pressure instead of the return spring, the weight can be reduced.

  The chuck mechanism 11 is coupled to the front portion of the rod 32 of the oil piston 31 and engaged with the female taper body 33, and is biased by a return spring 35 in a direction away from the tip of the rod 32 to the front. An internal body 36 slidable in the cylindrical body 34, and a male taper body 37 divided into two and attached to the internal body 36 and housed in the female taper body 33. When retreating, the female taper body 33 is engaged with the cylinder 34 retreating together with the rod 32 and retreats, and the relative position between the male taper body 37 and the female taper body 33 changes, so that the male taper body 33 changes. The body 37 receives the pressure of the inner tapered surface of the female taper body 33 to reduce the diameter, and grips the rivet pin inserted into the male taper body 37.

  With such a configuration, when the trigger switch 14 is pulled while the rivet pin is inserted into the male taper body 37, the rivet pin gripped by the chuck mechanism 11 moves backward to perform caulking. After breaking, only the pins are separated and remain in the male tapered body 37. When the pulling operation of the trigger switch 14 is released when the caulking process is completed, the vacuum opening 5 is opened as described above, so that the oil piston 31 is returned to the initial position, and the return spring 35 is used to The taper body 37 is expanded in diameter, and the pin is in a free state. At the same time, the vacuum mechanism 2 is actuated and the pins are collected in a pin accommodating container 38 that is detachably attached to the rear portion of the oil cylinder 30.

  The vacuum mechanism 2 includes a throttle portion for increasing the flow rate of air (compressed air) supplied from the urethane hose 20, and generates a negative pressure at the front portion of the pin recovery hole 32 a formed in the rod 32. Thus, the free pin is sucked into the pin collection hole 32a and collected in the pin container 38. In the present embodiment, such a vacuum mechanism 2 is disposed immediately after the chuck mechanism 11. By providing the vacuum mechanism 2 at such a relatively forward position, a negative pressure can be applied to the pins without waste, and the pins can be recovered efficiently.

  As described above, in the present embodiment, when the trigger switch 14 is turned on to perform the caulking process, when the spool 6 is moved to a position where the hydraulic / pneumatic pressure opening 4 is opened and the hydraulic mechanism 1 is operated, Since the vacuum opening 5 is closed by the sleeve 7 that moves in conjunction with the spool 6, the hydraulic mechanism 1 can be operated without loss of air pressure, and efficient caulking can be performed. On the other hand, when the crimping process is completed and the trigger switch 14 is released, the valve sleeve 21 is closed, so that the pressure in the void 18 rises and the spool 6 moves to a position where the hydraulic / pneumatic pressure opening 4 is closed. Since the vacuum opening 5 is opened by the sleeve 7 to be operated, the vacuum mechanism 2 can be operated without loss of air pressure, and the pins can be efficiently recovered. Since the movement of the sleeve 7 is performed in conjunction with the movement of the spool 6, it is automatically performed without requiring any operation from the outside, so that loss of air pressure can always be reliably prevented. it can.

  It should be noted that the present invention is not limited to the configuration of the embodiment, and can be freely changed in design, improved, etc. as necessary without departing from the spirit of the invention. For example, the vacuum opening 5 The opening / closing member 7 for opening and closing the opening / closing member is not particularly limited as long as it can be disposed in the air passage 3 so as to be slidably movable in conjunction with the spool 6. Further, the types and configurations of the chuck mechanism 11, the vacuum mechanism 2, and the air riveter AR may be appropriately selected in addition to those described in this embodiment.

It is principal part structure explanatory drawing of the air supply apparatus which concerns on embodiment of this invention, (a) shows the state of a trigger switch off, (b) shows the state of a trigger switch on. (A) and (b) are AA sectional views of (b) of FIG. (A) is a top view of the air supply apparatus, (b) is a side view, and (c) is a DD cross-sectional view of (a). (A) is a right side view of the air riveter, (b) is a front view, and (c) is a left side view. It is sectional drawing of the air riveter, and is BB sectional drawing of FIG.3 (b). It is sectional drawing which shows an example of the conventional air riveter. It is principal part sectional drawing in the other example of the air riveter.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Hydraulic mechanism 2 ... Vacuum mechanism 3 ... Air passage 4 ... Hydraulic / pneumatic pressure opening 5 ... Vacuum opening 6 ... Spool 7 ... Opening / closing member (sleeve)
7a: Large diameter portion 7b: Opening 7c: Small diameter portion

Claims (2)

A hydraulic mechanism (1) that operates with air pressure to slide a chuck mechanism capable of gripping rivet pins, and a vacuum mechanism (2) that uses air pressure to collect the pins separated after rivet fastening. ), And an air supply device for supplying air,
Supplying air to the air passage (3) connected to the air supply source for supplying air for operating the hydraulic mechanism (1) (4) and air to the vacuum mechanism (2) A vacuum opening (5) for opening and closing, and a spool (6) for opening and closing the hydraulic / pneumatic pressure opening (4), and an opening and closing member for opening and closing the vacuum opening (5) ( 7) are arranged in the air passage (3) so as to be slidably movable in conjunction with each other, and when the spool (6) is in a position to open the hydraulic / pneumatic opening (4). The vacuum opening (5) is closed when the vacuum opening (5) is closed and the spool (6) is in a position to close the hydraulic / pneumatic pressure opening (4). Air supply device.   The opening / closing member (7) is a sleeve having a large-diameter portion (7a) and a small-diameter portion (7c) having an opening (7b), and the spool (6) is the hydraulic / pneumatic opening (4). The vacuum opening (5) is closed by the large diameter portion (7a) when the spool (6) is in the position to close the hydraulic / pneumatic opening (4). The air supply device according to claim 1, wherein the opening (7b) of the small portion (7c) communicates with the vacuum opening (5).

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