JP2015200205A - air compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem in which an air compressor cannot be used while a battery is charged, for the air compressor which is small-sized and light-weight, which is portable by a user hanging it on the shoulder and the like, and which can use a battery as a power supply.SOLUTION: An air compressor can use a commercial 100 V power supply by connecting a power supply adapter 5, and it is configured by including a hose take-up part 40 capable of taking-up an air hose 41 of a sufficient length. Thereby, in the case where a battery pack 2 is used as a power supply, by taking-up the air hose 41 in short length, work is not interfered, and in the case where a compressor body 1 is installed in the vicinity of the commercial 100 V outlet, the air hose 41 can be drawn out in long length and a work range can be secured.

Description

  The present invention relates to an air compressor for generating compressed air to be a driving source of an air tool such as a driving tool driven by a compressed air.

  2. Description of the Related Art Conventionally, there has been provided a small and lightweight air compressor that a user can freely carry, for example, by holding it in his hand or carrying it on his back. In such a conventional portable air compressor, a battery is used as a power source. Techniques relating to such battery-type air compressors are described in the following patent documents. However, as described in the following patent document, when only the battery is used as the power source, if the battery runs out, it is necessary to charge or replace it with another battery. become unable. For this reason, it is desirable that a commercial 100V AC power source can be used as a power source separately from the battery. If it is used for both charging and exchange, a battery can be used as a power source when the air compressor is used on the back, and an AC power source can be used as a power source when installed near a commercial 100V outlet. The power supply can be switched according to the conditions.

JP 2012-177356 A

  However, there are the following problems when the air compressor is used as a power source for charging and exchange. When the battery is used as a power source and is carried with the air compressor on the back, the air hose to which the air tool is connected is longer than necessary, so that the workability is impaired. On the other hand, when an AC power source such as a commercial 100V power source is used as the power source and the air compressor is installed near the power outlet, the work range becomes wider when the air hose to which the air tool is connected is sufficiently long. Workability is improved. For this reason, when the power source is used for both charging and exchange, it is desirable that the length of the air hose can be changed accordingly. However, it is troublesome to replace the connected air hose every time the power source is switched, and the workability is rather impaired.

  In the present invention, when the battery (secondary battery) and the AC power supply can be switched and used as a DC power supply, the length of the air hose can be changed to an arbitrary length without bothering the exchange. The purpose is to further improve the efficiency of the work used.

  Said subject is solved by each following invention. 1st invention is the air compressor which equipped the main body case with the air generation part which uses an electric motor as a drive source. In 1st invention, both DC power supply and AC power supply can be utilized as a power supply, and the hose winding part which can wind up the air hose for connecting an air tool is provided. According to the first invention, by using a battery as a DC power source as a power source, the user can carry out the work efficiently by carrying the air compressor on the back. When an AC power supply is used instead of a DC power supply, the air compressor can be installed near a commercial 100V outlet and used for a long time.

  Moreover, according to 1st invention, the air compressor is provided with the hose winding-up part for winding up an air hose. For this reason, the length of the air hose (the amount drawn from the hose winding portion) can be arbitrarily adjusted according to the work content. When using a DC power supply, the air compressor can be carried on the back, and in this case, the work efficiency can be improved by shortening the air hose so as not to get in the way. On the other hand, when an AC power source is used, the air compressor can be installed near a commercial 100V outlet. In this case, the work range can be widened by extending the air hose. In this way, it is possible to switch between DC power supply and AC power supply, and by arbitrarily adjusting the amount of air hose drawn from the hose winding part according to the power supply, work efficiency using air tools can be improved Can be further promoted.

  A second aspect of the invention is the air compressor according to the first aspect of the present invention, wherein the air compressor is provided with a tool for carrying by the user. According to the second invention, the user can carry out the work efficiently with both hands open by carrying the air compressor. A shoulder belt, a waist belt, or a shoulder belt can be set as a wearing tool.

  A third invention is the air compressor according to the first or second invention, wherein the hose winding portion is provided in a region within the outer diameter of the main body case when seen in a plan view. According to the third invention, the hose winding portion is provided so as not to protrude laterally (in the radial direction) from the main body case. Easiness).

  A fourth invention is an air compressor according to any one of the first to third inventions, wherein the compressed air generated by the air generating unit is directly discharged to the outside. According to the fourth invention, by omitting the tank for temporarily storing the compressed air generated by the air generating unit, the air compressor can be made compact and its portability can be further enhanced. it can.

  5th invention is an air compressor provided with the hose winding part adjacent to the air production | generation part in any one invention of 1st-4th. According to the fifth aspect of the present invention, the hose winding unit can be efficiently arranged in accordance with the flow of compressed air generated by the air generating unit, and thus the air compressor can be made compact.

  6th invention is an air compressor provided with the operation member for winding up an air hose by manual operation in the hose winding-up part in any one invention of 1st-5th. According to 6th invention, a hose can be wound up by manual operation. By using a manually operated type hose winding part, the hose winding part and thus the air compressor can be made low-cost and compact.

  7th invention is an air compressor provided with the automatic winding mechanism for winding up an air hose automatically in the hose winding part in any one invention of 1st-6th. According to the seventh aspect, the pulled-out air hose is automatically wound without being manually operated. As the automatic winding mechanism, an electric winding type using an electric motor as a driving source, or a spring winding type winding by a biasing force of a mainspring spring can be adopted.

  An eighth aspect of the invention is the air compressor according to any one of the first to seventh aspects, wherein the air generating unit includes a movable scroll that is rotated by an electric motor, and a fixed scroll that is fixed to the main body case. It is. According to the eighth aspect of the invention, the compressed air is generated by the so-called scroll type air generating unit. Since the scroll type compressor does not have a configuration in which the piston is reciprocated in the cylinder unlike the reciprocating type, there is an advantage that vibration and noise are small compared to the reciprocating type as a result of small torque pulsation. In addition, the scroll type has an advantage that the volume efficiency is better than that of the reciprocating type, so that it is relatively small and it is easy to obtain a large discharge amount.

It is a whole perspective view of the air compressor concerning this embodiment. It is a right view of the air compressor concerning this embodiment. It is the top view which looked at the air compressor concerning this embodiment from arrow (III) direction in FIG. FIG. 4 is a sectional view taken along the line (IV)-(IV) in FIG. 3, and is a longitudinal sectional view of the air compressor according to the present embodiment. FIG. 5 is a cross-sectional view taken along line (V)-(V) in FIG. 4, and is a cross-sectional view of the air compressor according to the present embodiment. It is a front view of the air compressor which attached the shoulder belt. It is a right view which shows the state in which the user carried the air compressor.

  Next, an embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 1 and 2, the air compressor CP of the present embodiment has a generally cylindrical outer appearance, a lightweight and compact electric compressor body 1, and a user who wears the compressor body 1. It is equipped with an “Equipment” for carrying with you. The compressor main body 1 has a function of supplying compressed air as a drive source to an air tool T such as a compressed air driven nail driver used by a user.

  A battery mounting portion 3 is provided on the lower surface of the compressor body 1. A rechargeable battery pack (secondary battery) 2 is attached to the battery attachment portion 3. The compressor body 1 operates using the battery pack 2 as a power source. The battery pack 2 is a lithium ion battery (18 V) that can be used as a battery for rechargeable electric tools such as screwing machines and cutting tools. The battery pack 2 can be repeatedly used by being removed and charged with a separately prepared charger.

  The battery pack 2 is attached to the battery attachment portion 3 by sliding from the front side to the back side, and can be removed by sliding from the back side to the front side. The attachment state of the battery pack 2 to the battery attachment portion 3 is locked by elastically engaging a lock claw (not shown in the drawing) of the battery pack 2 with respect to the engagement recess of the battery attachment portion 3. Is done. The engagement state of the lock claw with respect to the engagement recess can be released by pushing down the unlock button 2 a provided on the front side of the battery pack 2. The battery pack 2 can be removed from the battery attachment portion 3 by sliding the unlock button 2a downward and sliding it toward the front side.

  As shown in FIG. 4, an adapter connection portion 3 a for AC power supply connection is provided on the back side of the battery attachment portion 3. By connecting the power supply adapter 5 to the adapter connecting portion 3a, the air compressor 1 can be used as a commercial 100V AC power source. The power adapter 5 includes an adapter main body 5a having an AC / DC circuit, an AC power supply side power cord 5b, and a DC power supply side adapter cord 5c. By connecting the adapter cord 5c to the adapter connector 3a and connecting the power cord 5b to a commercial 100V power outlet, the commercial 100V AC power is converted to DC 18V and supplied to the power circuit. The user can arbitrarily select the 18V DC power source of the battery pack 2 and the commercial 100V power source as the power source of the air compressor 1. As shown in FIG. 4, when the battery pack 2 is attached to the battery attachment portion 3 and the power adapter 5 is connected to the adapter connection portion 3a, the power supply circuit is configured so that, for example, commercial 100V power is given priority.

  The compressor body 1 is a scroll type compressor, and its internal structure is shown in FIGS. The compressor main body 1 has a configuration in which a controller 11, a cooling fan 12, an electric motor 13, an air generation unit 20, and a hose winding unit 40 are arranged in series in a cylindrical main body case 10 in order from the bottom. . The cooling fan 12, the electric motor 13, and the air generation unit 20 constitute a mechanism unit 4 that is assembled through an upper mechanism base 15 and a lower mechanism base 14 that are coupled to each other.

  The controller 11 has a configuration in which substrates such as a power supply control circuit for the battery pack 2 and a control circuit for the electric motor 13 are accommodated in a shallow case. The controller 11 is fixed to the bottom of the main body case 10. A cooling fan 12 is located above the controller 11. The cooling fan 12 is attached to the output shaft 13 a of the electric motor 13.

  The electric motor 13 is an outer rotor type brushless motor, and includes a stator 13c on the inner peripheral side of the rotor 13b. A cylindrical holder 17 is attached to the rotor 13b. An output shaft 13 a is fixed to the center of the holder 17. The output shaft 13a is rotatably supported by the lower mechanism base 14 via a lower bearing 14a and an upper bearing 14b. A needle bearing is used for the lower bearing 14a, and a ball bearing is used for the upper bearing 14b. The stator 13 c is fixed to the lower surface side boss portion 14 c of the lower mechanism base 14.

  An eccentric hole 13d is provided in the upper part of the output shaft 13a. The movable side scroll (spiral member) 21 of the scroll type air generating unit is rotatably supported in the eccentric hole 13d. A fixed scroll 22 is arranged on the upper side facing the movable scroll 21. The fixed scroll 22 is fixed to the upper mechanism base 15. As the output shaft 13a rotates, the movable scroll 21 pivots with respect to the fixed scroll 22 to generate compressed air. The generated compressed air is discharged to the air chamber 24 through a discharge port 22 a provided at the center of the fixed scroll 22. A check valve 23 is attached to the discharge port 22a. The air chamber 24 is airtightly partitioned by an air chamber case 26 attached to the upper mechanism base 15. An air hose 41 is connected to the air chamber 24 via a discharge pipe 25 attached to the upper surface of the air chamber case 26.

  The air hose 41 has a sufficient length, and a coupler 42 for connecting the air tool T is attached to the tip of the air hose 41. The air hose 41 can be taken up by the hose take-up unit 40 and can be pulled out to an arbitrary length. The hose winding part 40 is rotatably attached via a support shaft part 26 a provided on the upper surface of the air chamber case 26. The hose winding unit 40 has a cylindrical shape smaller than the outer diameter of the main body case 10 and is accommodated in the upper portion of the main body case 10. For this reason, the hose winding part 40 is accommodated in an area within the outer diameter of the main body case 10 when seen in a plan view.

  At the center of the hose winding part 40, a winding core part 44 is provided. The upper part of the take-up core part 44 protrudes to the upper surface side of the main body case 10. A winding lever 43 for manual operation is attached to the protruding portion of the winding core 44. When the user grips the take-up lever 43 and manually rotates it, the pulled out air hose 41 can be taken up around the take-up core portion 44. The air hose 41 is pulled out from a hose hole 10 c provided in the side portion of the main body case 10. The pressure of the compressed air discharged through the air hose 41 can be confirmed by a pressure gauge 27 arranged on the upper surface side of the main body case 10 as shown in FIG.

  On the lower side of the main body case 10, intake ports 10 a to 10 a for introducing outside air (cooling air) into the inside are provided. Exhaust ports 10 b to 10 b for discharging the introduced outside air to the outside are provided on the upper side of the main body case 10. As shown in the drawing, the intake ports 10 a to 10 a and the exhaust ports 10 b to 10 b are slit-like through grooves that are long in the vertical direction, and are arranged in parallel along the periphery of the main body case 10. As illustrated in FIG. 4, the intake ports 10 a to 10 a are disposed around the controller 11 and the cooling fan 12. The exhaust ports 10 b to 10 b are arranged around the air generation unit 20. When the cooling fan 12 rotates as a result of the start of the electric motor 13, outside air is sucked into the main body case 10 through the intake ports 10 a to 10 a. The sucked outside air is blown by the cooling fan 12 to the controller 11, the rotor 13 b and the stator 13 c of the electric motor 13 to cool them. The holder 17 is provided with a plurality of ventilation holes 17a to 17a.

  The cooling air flowing upward from the intake ports 10 a to 10 a by the cooling fan 12 is exhausted to the outside from the exhaust ports 10 b to 10 b through the outer peripheral side of the lower mechanism base 14 and the outer peripheral side of the air generating unit 20. On the outer periphery of the air generation unit 20, a sufficient gap (ventilation paths 7 to 7) is formed between the main body case 10 and the cooling air to pass therethrough so that a large ventilation resistance is not generated. Thus, the smooth exhaust through the exhaust ports 10b to 10b is performed.

  As shown in FIG. 5, support convex portions 22 b to 22 b projecting in the radial direction are provided at the quarter-division positions around the fixed scroll 22. In addition, although not shown in the drawing, support convex portions projecting in the radial direction are also provided at the peripheral quadrant positions of the upper mechanism base 15. The support convex portions 22b to 22b of the fixed side scroll 22 and the support convex portion of the upper mechanism base 15 are screwed to the base portion provided on the inner surface of the main body case 10 by the fixing screws 6 to 6, and the fixed side scroll. 22 and the mechanism base 15 are fixed to the main body case 10.

  A ventilation path 7 is formed between the adjacent support convex portions 22 b and 22 b of the fixed scroll 22. Each ventilation path 7 is located between the outer peripheral side of the air generation unit 20 and the exhaust ports 10 b to 10 b of the main body case 10. The cooling air (outside air) introduced from the intake ports 10a to 10a by the rotation of the cooling fan 12 flows upward in the main body case 10, and then is smoothly discharged from the exhaust ports 10b to 10b through the ventilation paths 7 to 7. The

  A pair of left and right belt hooks 18, 18 are provided on the upper portion of the main body case 10. As shown in FIG. 6, a shoulder belt 19 for a shoulder is attached to the belt hooks 18, 18 as an example of an accessory for a user to wear the compressor body 1 and carry it. it can. The user can carry the compressor body 1 with his shoulders on the shoulder and carry it with his hands open, so that the user can efficiently hold the air tool T with both hands. be able to.

  Further, in the case of a portable air compressor, at least one hand is blocked during carrying, and it is necessary to install it on a stable floor or the like during work. In the case of the air compressor 1 according to the present embodiment, Since the compressor body 1 can be carried in the empty-handed state with both hands open to the attachment and can be driven in as it is, workability and handling are greatly improved compared to a portable air compressor. Can be increased. As shown in FIG. 3, a power switch 28 and an operation indicator lamp 29 are disposed on the upper surface of the compressor body 1 in addition to the winding lever 43 and the pressure gauge 27 described above.

  According to the air compressor CP of the present embodiment configured as described above, a sufficiently long air hose 41 is provided as an air hose for supplying the compressed air generated by the air generating unit 20 to the air tool T. The air hose 41 can be wound up to an arbitrary drawing length by the hose winding portion 40. Further, according to the air compressor CP of the present embodiment, the battery pack 2 as a DC power source or a commercial 100V AC power source can be arbitrarily selected and used. Therefore, when the user carries the compressor main body 1 with a wearable tool and uses the battery pack 2 as a power source, the air hose 41 is pulled out to shorten the length of the air hose 41 so that it does not get in the way. The tool T can be used, and thereby the work can be performed efficiently.

  On the other hand, when the commercial adapter 100V is used as the power source of the compressor body 1 by connecting the power adapter 5 to the adapter connection portion 3a, the compressor 1 can be installed near the power outlet. In this respect, the user can easily work with ease. Moreover, by pulling out the air hose 41 sufficiently long from the hose winding part 40, the work range using the air tool T can be widened, and in this respect as well, work efficiency can be improved. As described above, the air compressor CP of the present embodiment includes the air hose 41 according to the usage type or power source of the compressor main body 1 such as a portable type (mainly when using a DC power source) and a stationary type (mainly when using an AC power source). Since the length of the drawer can be adjusted arbitrarily, the work can be efficiently performed without taking the trouble of exchanging the air hose.

  Various modifications can be made to the embodiments exemplified above. For example, as shown in FIG. 7, the compressor main body 1 can be carried with the back of the compressor main body 1 on the back by attaching a belt 30 as a tool to the compressor main body 1. The shoulder belt 30 includes a back rest portion 31, shoulder belt portions 32 and 32, and a waist belt portion 33. The back rest 31 is provided with main body fixing belts 31 a and 31 a for holding the compressor main body 1. The upper and lower body fixing belts 31 a and 31 a can hold the compressor body 1 along the rear surface of the backrest portion 31. In this case, as shown in the figure, the compressor 42 (the front side of the compressor body 1) of the air hose 41 faces the back, and the compressor body 1 is fixed to the backrest 31 to generate air when the user carries the back. It is possible to make the back 20 less susceptible to the heat generated by the part 20 and the like.

  The upper side of the shoulder belt portions 32, 32 is coupled to the left and right upper portions of the backrest portion 31. The lower side of the left and right shoulder belt portions 32, 32 is coupled to the left and right upper portions of the waist belt portion 33. The waist belt portion 33 can be fixed along the waist by tightening the buckle portion 33a. The user can carry the compressor body 1 on the back by using the shoulder belt 30. By carrying the compressor body 1 on the back using the shoulder belt 30 as an accessory, the workability can be further improved as compared with the case of carrying the shoulder belt 19.

  In addition, although not shown, a waist belt may be attached in place of the shoulder belt 19 or the shoulder belt 30 so that the compressor body 1 can be portable while being suspended from the waist. Further, for example, a hook may be attached to the belt hook 18 and the compressor main body 1 may be hooked on the belt of the work pants via the hook and carried in a hand-held state.

  The configuration of connecting the power adapter 5 with the AC / DC conversion circuit and making it possible to use the commercial 100V power supply has been illustrated. For example, by installing the conversion circuit in the battery mounting portion 3, the power cord can be connected from the battery mounting portion. It is good also as a structure which pulls out.

  In addition, the manual operation type hose winding unit 40 that winds the air hose 41 by manually rotating the winding lever 43 is illustrated, but a semi-automatic type that winds up the air hose 41 with its urging force by incorporating a mainspring spring. It is good also as a hose winding part. Furthermore, it is good also as a fully automatic winding-type hose winding part by incorporating the electric motor for winding. Even if it is a semi-automatic winding type or a fully automatic winding type, the same effect can be obtained by being able to draw out the air hose 41 to an arbitrary length.

CP ... Air compressor T ... Air tool 1 ... Compressor body 2 ... Battery pack, 2a ... Unlock button 3 ... Battery attachment part, 3a ... Adapter connection part 4 ... Mechanical part 5 ... Power adapter 5a ... Adapter body, 5b ... Power cord 5c ... Adapter cord 6 ... Fixing screw 7 ... Ventilation path 10 ... Main body case 10a ... Intake port, 10b ... Exhaust port, 10c ... Hose hole 11 ... Controller 12 ... Cooling fan 13 ... Electric motor 13a ... Output shaft, 13b ... Rotation Child, 13c ... Stator, 13d ... Eccentric hole 14 ... Lower mechanism base, 14a, 14b ... Bearing, 14c ... Lower surface side boss 15 ... Upper mechanism base, 15a ... Supporting convex part 17 ... Holder, 17a ... Ventilation hole 18 ... belt hanger 19 ... shoulder belt (attachment)
20 ... Air generation part (scroll type)
DESCRIPTION OF SYMBOLS 21 ... Movable side scroll 22 ... Fixed side scroll, 22a ... Discharge port 23 ... Check valve 24 ... Air chamber 25 ... Discharge pipe 26 ... Air chamber case, 26a ... Spindle part 27 ... Pressure gauge 28 ... Power switch 29 ... Operation Indicator light 30 ... Shoulder belt (wear)
DESCRIPTION OF SYMBOLS 31 ... Back support part, 31a ... Main body fixing belt 32 ... Shoulder belt part 33 ... Waist belt part, 33a ... Buckle part 40 ... Hose winding part 41 ... Air hose 42 ... Coupler 43 ... Winding lever 44 ... Winding core part

Claims (8)

An air compressor with a built-in air generator that uses an electric motor as a drive source. Both the DC power supply and the AC power supply can be used as power supplies, and an air hose for connecting an air tool can be wound. Air compressor with hose winding part. The air compressor according to claim 1, wherein the air compressor includes a wearing tool for a user to carry. 3. The air compressor according to claim 1, wherein the hose winding portion is provided in a region within an outer diameter of the main body case when seen in a plan view. The air compressor according to any one of claims 1 to 3, wherein the air compressor has a tankless structure that directly discharges the compressed air generated by the air generation unit to the outside. It is an air compressor given in any 1 paragraph of Claims 1-4, Comprising: The air compressor provided with the hose winding part adjacent to the air generation part. 6. The air compressor according to claim 1, wherein the hose winding portion includes an operation member for winding the air hose by a manual operation. The air compressor according to any one of claims 1 to 5, wherein the hose winding unit includes an automatic winding mechanism for automatically winding the air hose. The air compressor according to any one of claims 1 to 7, wherein the air generation unit includes a movable scroll that is rotated by the electric motor, and a fixed scroll that is fixed to the main body case. Air compressor.

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