JP6961924B2 - Air compressor - Google Patents

Description

The present invention relates to an air compressor for construction used at a construction site or the like.

At new construction sites and remodeling sites, work such as nailing is frequently performed, and the amount of work is considerable. Therefore, pneumatic tools are often used for nailing. Since a pneumatic tool requires compressed air, an air compressor for generating compressed air is carried to the site, and a tool such as a nail gun is connected to the air compressor for work. As a portable air compressor used at such a construction site, those disclosed in Patent Documents 1 and 2 and the like are known.

As disclosed in Patent Documents 1 and 2, the basic configuration of the compressor includes a compressor for generating compressed air and a tank for storing compressed air. Recently, two types of compressed air, one for low pressure (for normal pressure) and the other for high pressure, can be adjusted by a pressure reducing valve, so a plurality of air outlets (air chucks) are provided. There are also two air outlets arranged side by side.

In an air compressor equipped with multiple air outlets in this way, the amount of compressed air used is also large, so it is essential to increase the size (large capacity) of the tank, such as by configuring the tank into a catamaran type. It has become. On the other hand, miniaturization of products is also required so that the air compressor can be installed in a limited space.

JP 2012-219648 JP 2013-189897

By the way, in the configuration of Patent Document 1, operation units such as a power switch and pressure adjustment and an air hose connection portion are centrally arranged on one end side of the main body. By centrally arranging in this way, access to the operation unit becomes easy even if the air compressor is installed in a narrow space.

However, in reality, handles are provided at the top of the tank at both ends of the air compressor body, and the handles are located in the direction of the air outlet, so the tool air hose can be attached to or removed from the air outlet. The handle is in the way, which greatly hinders the smooth hose attachment / detachment work.

Therefore, as in Patent Document 2, the air outlet installed on the outside of the handle is further attached to the outside of the main body.

In this way, the tool air hose attached to the air compressor is attached so as to protrude outward from the air compressor main body. Therefore, when the air outlet is installed facing outward, the tool air hose protruding from the main body and this It is necessary to secure a space for attaching and detaching the hose, which requires a large installation space.

Moreover, when tool hoses are connected to all four air outlets, the builder's site is smooth in a work space with a relatively small work space such as a construction site or a remodeling site. It also hinders the movement.

Therefore, the present invention solves such a conventional problem, and by preventing the tool air hose from protruding to the surroundings without sacrificing the workability of attaching and detaching the tool air hose, the space can be narrowed. It can be installed.

In order to solve the above-mentioned problems, the air compressor according to the invention according to claim 1 has a plurality of tanks, a tank portion for storing compressed air, and a compressor for generating compressed air mounted on the upper portion of the tank portion. The compressor and a plurality of air take-out parts for taking out compressed air from the tank part are provided. The pair of the air take-out portions have an air take-out port and a conduit provided with the air take-out port, so that when the air compressor main body is viewed from the front, the conduits are closer to the center of the air compressor main body. It is characterized in that it is arranged so as to be inclined with respect to the tank in a direction facing each other with respect to the center of the air compressor main body.

The air compressor according to the second aspect of the present invention is characterized in that the air take-out portion is arranged near the center of the compressor body when the air compressor body is viewed from the front.

Air compressor according to the third aspect of the present invention, in the air compressor of claim 1, wherein an air outlet provided in the upper Symbol air extraction unit, than the vertical plane passing through the central axis of the tank, The feature is that it is arranged near the center of the air compressor body.

Air compressor according to the invention of claim 4, wherein in the air compressor of claim 1, wherein an air outlet provided in the upper Symbol air extraction unit, that is disposed in a space above the tank and the tank is opposed It is a feature.

The air compressor according to the present invention according to the fifth aspect of the present invention is the air compressor according to the first aspect, wherein the compressor includes a cylinder for compression and a motor for driving the cylinder, and the cylinder and the motor. The feature is that an inverter board for driving and controlling the motor is installed in the space existing between them.

The air compressor according to the present invention according to claim 6 is the air compressor according to claim 1, wherein the compressor is a first cylinder for compression arranged along the longitudinal direction of the tank formed in an elongated shape. It has a second cylinder, and a drain pipe for drain discharge is connected between the tanks, and this drain pipe is along the second cylinder different from the first cylinder adjacent to the air take-out portion. It is characterized by being arranged.

The air compressor according to the present invention according to claim 7 is the air compressor according to claim 1 , wherein a drain pipe for drain discharge is connected between the tanks, and a drain cock connected to the drain pipe. Is characterized in that it is arranged at a position adjacent to the air take-out portion.

The air compressor according to the present invention according to claim 8 is characterized in that, in the air compressor according to claim 1, an air connecting pipe communicating between the tanks is provided in the pipeline of the air take-out portion. do.

The air compressor according to the present invention according to claim 9 is the air compressor according to claim 1, wherein a pressure reducing valve and a pressure gauge are provided at an air take-out portion, and the pressure reducing valve and the pressure gauge are on an axis toward the center of the tank. It is characterized by being placed in.

The air compressor according to the present invention has a basic configuration consisting of a compressor that generates compressed air and a tank that stores compressed air, and is provided with an air take-out unit for taking out compressed air from the tank, and the air take-out part is provided. It is placed closer to the center of the tank. That is, the air take-out portion is arranged near the center of the air compressor main body. The air outlet provided in the air outlet is arranged in the space where the tank and the tank face each other. As a result, the tool air hose can be attached / detached (attached / detached) without being disturbed by the handle.

Further, since the air take-out portion is provided near the center of the air compressor main body, the tool air hose does not protrude significantly around the air compressor main body, and the space occupied by the tool air hose can be reduced. Further, since it is not necessary to secure a space for attaching / detaching the tool hose to the peripheral portion of the air compressor main body, it can be installed in a narrow work space. In addition to this, since the arrangement of other parts has been devised so that the space around the compressor mounted on the upper surface of the tank can be effectively used, there is an actual benefit that the air compressor body can be further miniaturized.

It is a perspective view of the main part which shows an example of the air compressor which concerns on this invention. It is the right side view. It is the front view. It is a top view with the cover removed. It is a front view with the cover removed. It is a top view when it is attached to the tank of the air take-out part (the 1). It is the front view. It is the left side view. It is a top view when it is attached to the tank of the air take-out part (No. 2). It is the front view. It is the left side view. It is a top view when it is attached to the tank of the air take-out part (No. 3). It is the front view. It is the left side view. It is a top view when it is attached to the tank of the air take-out part (No. 4). It is the front view. It is the left side view. It is a right side view of the main part which shows the other example of the air compressor which concerns on this invention. It is the front view. It is a top view which shows the other example of the air compressor to which the air take-out part of FIG. 18 is applied. It is the right side view. It is the front view. It is a top view of the main part which shows still another example of the air compressor which concerns on this invention. It is the right side view. It is the front view. It is a vertical cross-sectional view centering on a motor shaft. It is a top view of the main part which shows still another example of the air compressor which concerns on this invention. It is the right side view. It is the front view.

Subsequently, an example of the air compressor according to the present invention will be described with reference to the drawings. Air compressors for driving pneumatic tools are used at construction sites such as construction sites and remodeling sites.

1 to 3 showing the overall configuration of the air compressor 10 are views in a state where the cover main body is attached, FIG. 1 is an overall perspective view thereof, FIG. 2 is a left side view thereof, and FIG. 3 is a front view. 4 and 5 are views in a state where the cover body is removed, FIG. 4 is a plan view thereof, and FIG. 5 is a front view.

Explaining with reference to FIGS. 1 to 5, the air compressor 10 mainly includes the air compressor 10.
Compressor 10A,
Tank section 10B (Fig. 1) that supports the compressor and stores the compressed air.
Air take-out part 10C, which takes out compressed air from the tank part 10B,
Circuit board (inverter board) 10D for driving the inverter for the compressor 10A,
Operation unit 10E for compressor control,
It is composed of a main body cover 10F (Fig. 1).

The basic configuration of the air compressor main body is a compressor 10A and a tank portion 10B.

<Compression 10A configuration>
As shown in FIG. 4, the compressor 10A has a compression motor 12, and a cooling fan 13 is attached to a rotating shaft (motor shaft) (not shown) thereof, and the side opposite to the cooling fan 13 is attached. A compression cylinder 15 is arranged on the motor shaft side.

In this example, the cylinder 15 has a secondary cylinder 15B in addition to the primary cylinder 15A, and is arranged in the left-right direction orthogonal to the motor axis. In order to compress the air in the cylinder 15, a piston driving means (not shown) that connects the motor shaft and the pistons (not shown) of the primary and secondary cylinders 15A and 15B is directly connected to the motor shaft in the crankcase 16. , The piston is driven by the rotation of the compression motor 12 to compress the air in the cylinder 15. Since the piston driving means is directly connected to the motor shaft, the compression motor 12, the crankcase 16 and the cylinder 15 are integrated.

The compressed air of the primary cylinder 15A is sent to the secondary cylinder 15B via an air connecting pipe 17 piped so as to straddle the upper part of the crankcase 16, and the compressed air compressed to a higher pressure by the secondary cylinder 15B is released. In this example, it is sent to the tank 21B on the right side via the air connecting pipe 18.

<Relationship between motor and tank>
The compressor 10A is attached to the upper part of the tank portion 10B as described above. In this example, the tank portion 10B is composed of two cylindrical tanks.
When the length from the primary cylinder 15A to the secondary cylinder 15B (the length of the cylinder shaft) is longer than the length of the compressor 10A including the cooling fan 13 (the length of the motor shaft), as shown in FIG. The cylinder shaft is parallel to the tank shaft of the cylindrical tank, and the compressor 10A is mounted so that the motor shaft is orthogonal to the tank shaft. This is to prevent the mounted compressor from protruding from the side surface of the tank portion 10B even when the air compressor 10 is miniaturized.

The compressor 10A is attached to the upper part of the tank portion 10B. Although not shown, the metal fasteners (male side) joined to the tanks 21A and 21B and the metal fittings (female side) joined to the compressor 10A are used for fixing.

In this case, although a cushioning material (rubber material or the like) is interposed between the two, the compressor 10A is configured to be relatively loosely fitted so that the compressor 10A can swing slightly. This free swing makes it difficult for the vibration from the compressor 10A to be transmitted to the tank portion 10B side.

As the tank portion 10B shown in FIG. 1, a pair of cylindrical tanks 21A and 21B having a length and a diameter capable of storing a predetermined amount of air are used, and the tanks are predetermined so as to be a twin-body tank. It is attached and fixed with a pitch (tank pitch). In this example, the connecting plate bodies 20 are welded and fixed to each other as shown in FIG.

As shown in FIG. 4, a drain pipe 22 is connected between both the left tank 21A and the right tank 21B along the lower side of the secondary cylinder 15B on the upper surface of the tank portion 10B on the rear end side. The drain pipe line 22 is for discharging the water accumulated on the inner bottom surface of the tank portion, and a water discharge pipe (not shown) is vertically installed in each tank pipe.

The drain cock 25 is provided on the front surface side of the right tank 21B and on the upper surface facing the vicinity of the lower surface of the primary cylinder 15A. Then, the drain cock 25 is connected to the rear drain pipe 22 by a drain connecting pipe (not shown). The connecting pipe 26 for draining water from the drain cock 25 is discharged from the side surface of the right tank 21B as shown in FIG. However, this drain connection and drainage piping is an example.

A plurality of, for example, four legs 60 are provided at predetermined positions on the lower surfaces of the tanks 21A and 21B. In order to give the leg portion 60 a cushioning effect, a molded product of a rubber material or the like is used.

<Relationship between compressor and tank mounting position>
By mounting the compressor 10A closer to the rear end side (right end side in the figure) of the tank portion 10B, a space for mounting various members is secured in the upper part of the front end end of the tank as shown in FIG. Specifically, the various members are an air take-out unit 10C, an inverter board 10D for a compressor, and a mounting space for an operation unit 10E for operating the compressor, as will be described later.

<Air take-out part>
The air take-out part 10C is a member for taking out the air stored in the tank part 10B and supplying it to the tool, and is an air connection port (tank part 10B) provided on the upper surface side (zenith side) of each tank front end. The primary pressure pipeline 32A (FIG. 6 or less) forming a part of the air take-out portion 10C is connected to (not shown) because a large number of components are mounted on the upper surface side of the above.

Air is guided to the terminal air outlet (air chuck) 38 via the primary pressure pipeline 32A and the secondary pressure pipeline 32B described later, and is a tool (nail gun) via a hose inserted into the air outlet 38. Etc.) is supplied with air.

<Positional relationship between air take-out part and tank part>
The air take-out portion 10C is provided near the front end of the tank (near one end in the longitudinal direction) so that when the air compressor body is viewed from the front, it is in a state of being brought closer to the center of the air compressor body when viewed from the front. A pair of air take-out portions 10C are attached to the upper parts of the left tank 21A and the right tank 21B so as not to protrude much from the upper surface of the tank.

The air take-out part 10C from the left tank 21A and the air take-out part 10C from the right tank 21B are arranged so as to be close to the center of the air compressor main body, and further, the air take-out port 38 provided in the air take-out part 10C. Are arranged so as to be located in the facing space of the pair of tanks 21A and 21B. Therefore, when the air outlet 38 is bifurcated vertically, at least the air outlet 38b located on the lower side is near the tangent line connecting the intersections of the vertical axis passing through the center of each tank and the outer peripheral surface. It is preferably located (including above, below, and crossover).

Since the air take-out portion 10C is arranged closer to the center surface side of the air compressor main body, the positional relationship is such that the air take-out port 38 can be seen from between the legs of the grip (handle) 28 as shown in FIG. The tool air hose is inserted between the grips 28 (between the legs). As a result, the air hose for the tool does not protrude significantly from the air compressor body to the outside, and at the same time, the work space for attachment / detachment work can be made smaller, so even in a site where the work space is small, it is for other construction work. You can work without disturbing the equipment. The grip 28 is a grip portion for transporting the air compressor 10.

<Structure of air take-out part (1)>
The air take-out unit 10C is devised so that the height, width and depth are as short as possible so that the space occupied at the time of installation can be reduced and the size can be reduced.

A specific example thereof is extracted and shown in FIG. FIG. 6 is a plan view when the tank portion 10B is attached, FIG. 7 is a front view thereof (front side of the air compressor main body), and FIG. 8 is a left side view thereof (side surface side of the left tank 21A). be.

The air take-out unit 10C is composed of a primary pressure line 32A, a secondary pressure line 32B communicating with the primary pressure line 32A, and an air take-out port (air chuck) 38 provided at the tip of the secondary pressure line 32B. .. Since the air take-out part 10C attached to each of the tanks 21A and 21B is symmetrically configured, only the air take-out part 10C attached to the left tank 21A will be described.

The air take-out portion 10C rises above (toward the compressor) from the connection port (not shown) bored at a predetermined position on the upper surface of the left tank 21A on the front side, and then is a primary pressure pipe heading toward the center of the air compressor body. It has a road 32A.

A pressure sensor 34 for detecting the pressure inside the tank is attached to the extension end of the pipeline 39A parallel to the motor shaft of the primary pressure pipeline 32A, and a pressure reducing valve is mounted on the pipeline 39B perpendicular to the motor shaft and parallel to the tank shaft. 33 is attached. Reference numeral 33A is an operating portion (grip portion) for pressure adjustment.

Of the pipelines 39A constituting the primary pressure conduit 32A, an air connection port 37A is provided on the upper surface portion connected to the tank connection port, and the air connection ports 37A of the air take-out portion 10C are connected to each other by the air connection pipe 37 (FIG. 4). Are interconnected by. As a result, the air stored in the pair of tanks 21A and 21B is in a state of communicating with each other. By providing the connection portion (air connection port) of the air connecting pipe 37 above the primary pressure pipeline 39A, the air connecting pipe 37 utilizes the upper space of the air take-out portion 10C (the upper space of the primary pressure pipeline 32A). Can be piped.

The pressure reducing valve 33 is for adjusting the air discharge pressure, whereby the air discharge pressure from the tank portion 10B can be arbitrarily adjusted. For example, when the air take-out pressure on the left side is set to normal pressure, the air take-out pressure on the right side can be adjusted to be high pressure. This is because the required air discharge pressure may differ depending on the type of tool connected to each of the air outlets 38 (38A, 38B).

The pressure reducing valve 33 is arranged in a plane formed by an axis orthogonal to the motor shaft and the tank shaft of the compressor 10A and two shafts of the motor shaft, respectively, and in FIG. 6, the angle thereof with respect to the motor shaft. Is installed so that is 0 °. Therefore, the pressure reducing valve 33 is orthogonal to the motor shaft and thus the tank shaft.

The primary pressure is adjusted by the pressure reducing valve 33 to become the secondary pressure (output pressure) and flows into the secondary pressure pipeline 32B. The secondary pressure pipeline 32B is a crank-shaped pipeline, and the pressure gauge 35 is connected to the bent end portion (crank portion) 36B of the pipeline 36A parallel to the tank shaft. The secondary pressure can be known from the pressure gauge 35.

The pressure gauge 35 is arranged in a plane surrounded by an axis orthogonal to the motor shaft and the tank shaft, respectively, and the three shafts of the motor shaft and the tank shaft.

In FIGS. 6 to 8, the pressure gauge 35 is mounted in the plane surrounded by these three shafts so as to be tilted by 20 ° to 30 ° with respect to each of the motor shaft and the tank shaft and to face diagonally upward.

By tilting and mounting the pressure gauge 35, even if the pressure gauge 35 is placed close to the pressure reducing valve 33, the pressure reducing valve 33 can be operated without any trouble, and the instrument surface of the pressure gauge 35 faces diagonally upward. This can prevent dust such as dust from adhering to the instrument surface.

The tip of the pipeline 36C parallel to the crank-shaped tank shaft passes through the conduit parallel to the motor shaft connected to the pipeline 36A, and becomes an air outlet 38 having an air chuck function.

The air outlet 38 is divided into upper and lower parts. In this example, the upper air outlet 38A is a socket with a purge and the lower air outlet 38B is a normal socket.

In this way, the pair of air take-out portions 10C are substantially parallel to the horizontal line (motor shaft) connecting the top surfaces of the pair of left and right tanks 21A and 21B, and both of the air take-out portions 10C are brought closer to the center surface side of the main body. In addition to being arranged, the air take-out ports 38 and 38 from the air take-out portions 10C and 10C are arranged in the direction perpendicular to the secondary pressure pipelines 32B and 32B. Therefore, it is possible to realize a small air extraction unit 10C having a reduced height, width, and length.

In addition to this, the tool air hose can be attached to and detached from the air outlet 38 without being disturbed by the grip 28, and the pressure reducing valve 33 is between the grip 28 and the tank connection port 31A and is attached to the motor shaft. Since the pressure is adjusted in parallel, the pressure can be easily adjusted, and since the pressure gauge 35 is arranged at an angle, dust slides down the instrument surface, so that the instrument surface can be easily seen.

<Arrangement of inverter board>
The inverter is a group of circuit elements used to drive the compression motor 12, has an inverter board 10D, and has a plurality of circuit elements such as coils and capacitors on a substantially rectangular board as shown in FIG. Is mounted and configured.

The inverter board 10D is mounted on the upper surface of the tank portion 10B and in a space existing between the compression motor 12 and the primary cylinder 15A. The inverter board 10D is erected on a connecting member (not shown) to which the tank portion 10B is attached so as to be parallel to the motor shaft via an auxiliary member 82.

The inverter board 10D is shorter than the compression motor 12 and the crank case 16, and when the inverter board 10D is erected, the inverter board 10D does not overlap the circuit element of the inverter board 10D with the air extraction unit 10C described above. Thickness is selected.

The surface (back surface) of the inverter board 10D opposite to the circuit element mounting surface of the board is arranged so as to face the cooling fan 13 side, and is devised so that the inverter board 10D can be cooled efficiently.

<Arrangement of operation unit>
An operation unit 10E that controls the air compressor body is arranged in the space above the air extraction unit 10C. A power switch and the like are arranged on the operation unit 10E, and display parts such as a display indicator are attached. The operation unit 10E is attached with a predetermined inclination so that the operation surface does not protrude from the outer surface of the main body cover 10F described later.

<Body cover>
The main body cover 10F is for covering the compressor 10A or the like arranged above the tank portion 10B as shown in FIG. 1, and the outer shape of the compressor 10A itself (compression motor 12, primary and secondary cylinders 15A, The shape conforms to the outer edge shape of 15B), and is molded with a slight gap between the members so that the vibration of the compressor 10A can be tolerated.

The front surface of the main body cover 10F, that is, the front side of the air compressor main body is inclined to the front diagonally, but the portion facing the operation portion 10E is provided with a gap so that the operation portion is exposed.

As shown in FIG. 1, the main body cover 10F corresponding to the lower positions on both sides of the operation unit 10E is opened, whereby the pressure reducing valve 33, the pressure gauge 35, and the air extraction unit 10C described above are exposed to the outside, respectively. This ensures operability and visibility.

The lower ends of both side surfaces of the main body cover 10F are designed so that the gap is as small as possible in order to protect the user from the rotating portion and the electric circuit portion.

<Miniaturization of air compressor>
When arranging the compressor 10A above the tank portion 10B, a positional relationship was selected so that the compressor 10A could be miniaturized without protruding from the outer edge of the tank portion 10B. The height, width and depth of the air compressor are as short as possible because they are placed closer to the center of the compressor body. This makes it possible to reduce the size of the air compressor.

In addition to these configurations, the drain pipe is piped using the space between the secondary cylinder 15B and the tank portion 10B, and the drain cock 25 is arranged on the upper surface side of the tank portion 10B closer to the primary cylinder 15A, and the inverter. The substrate 10D is arranged by utilizing the space between the compression motor 12 and the primary cylinder 15A, and in particular, since it is erected so as to be parallel to the motor shaft, the space on the upper side of the tank portion 10B can be effectively used. .. As a result, the tank length and tank pitch can be shortened, so that the air compressor 10 can be further miniaturized.

<Structure of air take-out part (2)>
9 to 11 show a configuration example (No. 2) of the air take-out unit 10C. The basic configuration of (No. 2) is the same as that of the above-mentioned configuration example (No. 1), but the mounting angle of the pressure reducing valve 33 is different.

As described above, the pressure reducing valve 33 is arranged on a plane parallel to the plane passing through the shaft of the air take-out pipe and the shaft in the direction perpendicular to the compressor body. Specifically, the compressor 10A is arranged in a plane formed by an axis orthogonal to the motor shaft and the tank shaft, and two shafts of the motor shaft.

The ones shown in FIG. 9 and below are attached at an angle of 45 ° to 50 ° with respect to the motor shaft. The mounting position and mounting angle of the pressure gauge 35 are the same as those in the configuration example (No. 1).

Since the pressure reducing valve 33 is attached at an angle diagonally upward from (Configuration Example 1), the grip portion 33A is slightly separated from the upper surface of the left tank 21A, so that the rotation operation of the grip portion 33A becomes easier. Operability is improved.

<Structure of air take-out part (3)>
12 to 14 show a configuration example (No. 3) of the air take-out unit 10C. The basic configuration of (No. 3) is the same as that of the above-mentioned configuration example (No. 1). In this example as well, only the pressure reducing valve 33 has a different mounting angle.

The pressure reducing valve 33 is arranged in a plane formed by an axis orthogonal to the motor shaft and the tank shaft of the compressor 10A and two shafts of the motor shaft, respectively. The ones shown in FIGS. 12 and 12 are motors. It is mounted at an angle of 90 ° with respect to the shaft. As a result, the pressure reducing valve 33 is orthogonal to the motor shaft, in other words, the horizontal shaft of the tank portion 10B. The mounting position and mounting angle of the pressure gauge 35 are the same as those in the configuration example (No. 1).

Since the pressure reducing valve 33 comes on the vertical axis of the tank 21A, the pressure reducing valve 33 and the pressure gauge 35 are completely separated from each other, so that the operability of the grip portion 33A and the visibility of the pressure gauge 35 are improved.

<Structure of air take-out part (4)>
15 to 17 show a configuration example (No. 4) of the air take-out unit 10C. The basic configuration of (No. 4) is an example in which the inclination of the pressure gauge 35 is changed in the above-mentioned configuration example (No. 3).

As described above, the pressure gauge 35 has a plane passing through an axis orthogonal to the motor shaft and the tank shaft and a plane passing through the tank shaft and the axis perpendicular to the compressor body, that is, the motor shaft and the vertical direction. It is arranged in the plane surrounded by the three axes of the shaft and the tank shaft.

In the configuration example (No. 4), the pressure gauge 35 is mounted parallel to the motor shaft, orthogonal to the tank shaft, and thus parallel to the horizontal shaft. Therefore, the pressure reducing valve 33 and the pressure gauge 35 are orthogonal to each other.

<Relationship between the air take-out part and the tank (Part 2)>
In the examples shown in FIGS. 18 and 19, only the relationship between the air take-out portion and the tank is shown.

In the embodiment shown in FIG. 4 and below, a tank connection port with an air take-out portion is provided on a vertical axis passing through the center of the tanks 21A and 21B. In the embodiment shown in FIGS. 18 and 19, the tank connection port is bored inward with respect to the vertical axis by a predetermined angle. In the figure, a tank connection port is provided at an angle of about 20 °, and the air take-out portion 10C is connected to this port.

FIG. 20 and below show the overall configuration of the air compressor 10 to which this mounting configuration is applied. FIG. 20 is a plan view with the main body cover removed, FIG. 21 is a left side view thereof, and FIG. 22 is a front view thereof. A straight pipe is used as the pressure pipe of the air take-out portion 10C, and the pressure reducing valve 33 and the pressure gauge 35 are connected at a predetermined interval perpendicular to the straight pipe.

If the air take-out portion 10C is tilted and attached so as to be close to the central surface of the air compressor main body in this way, the air take-out portion 10C can be arranged so as to be concentrated in the central portion of the main body. As a result, the amount of protrusion of the tool hose can be reduced, the tool air hose can be easily attached and detached, and the installation space can be narrowed. In addition to this, the height of the air take-out portion 10C itself is shortened, so that the overall size of the air compressor can be reduced.

It is necessary to consider the operability of the pressure reducing valve 33 and the like to determine how much the air take-out portion 10C is tilted. It also depends on the width of the tank pitch of the pair of tanks 21A and 21B. Although the inclination is determined in consideration of these factors, the air compressor is more reliable than the conventional configuration in which the air take-out portion 10C is provided on the vertical axis passing through the center of the tanks 21A and 21B. It is effective because the air outlet 38 can be arranged on the center side of the main body.

Even if the air take-out port 38 is arranged at a position higher than the tank portion 10B, a certain effect can be obtained by arranging the air take-out portion 10C so that the air take-out port 38 approaches the inside of the air compressor main body.

<Inverter board layout example>
The above-mentioned example is an example in which the inverter board 10D is erected in a space surrounded by the compression motor 12 and the primary cylinder 15A so as to be parallel to the compression motor 12. FIG. 23 and below are examples of the compressor 10A arranged on the lower surface side in the space between the tanks 21A and 21B (tank facing space).

23 is a plan view at that time, FIG. 24 is a right side view, FIG. 25 is a front view, and FIG. 26 is a vertical sectional view including a motor shaft of the compressor 10A.

As shown in FIGS. 25 and 26, the inverter board 10D is erected and fixed in the substantially central portion of the connecting plate body 20 connecting the tanks 21A and 21B by using the facing space. As a result, the space surrounded by the compressor 10A and the primary cylinder 15A becomes an empty space, so that the compressor 10A and the air take-out portion 10C can be arranged close to each other. When the inverter board 10D uses a horizontally long board, it may be erected or mounted and fixed in parallel with the connecting plate body 20.

The space between the lower surface of the primary cylinder 15A and the upper surface of the tank 21B is used so that the primary cylinder 15A and a part of the air take-out portion 10C overlap each other in a plan view, specifically, as shown in FIGS. 23 and 24. The air take-out portion 10C is arranged close to the lower surface of the primary cylinder 15A so that a part of the primary pressure pipeline 32A constituting one of the air take-out portions 10C enters.

As the configuration of the air take-out portion 10C, the configuration of FIG. 6 is used. This is because the pressure reducing valve 33 is arranged sideways in parallel with the motor shaft, so that a part of the primary pressure pipeline 32A can enter the primary cylinder 15A. The air connecting pipe 37 piped so as to straddle the primary pressure pipelines 32A and 32A is bent in a U shape so as to bypass the side surface of the primary cylinder 15A. FIG. 29 shows a discharge pipe 70 for a drain pipe vertically installed in the tank 21A.

<Positional relationship between compressor and tank (Part 2)>
The air compressor 10 can also be configured such that the motor shaft of the compressor 10A is parallel to the tank shaft and the cylinder shaft is orthogonal to the tank shaft.

The following is designed based on this idea, and the length connecting the outermost edges of the pair of tanks is almost the same as the total length of the cylinder 15, and even when the air take-out portion 10C is arranged. After selecting the tank pitch so that it does not protrude from the outer edge of the tank portion 10B, the compressor 10A is placed and fixed on the upper portion of the tank portion 10B so that the cylinder shaft is orthogonal to the tank shaft.

An example of the configuration in that case is shown in FIG. 27 and below. 27 is a plan view of the air compressor 10, FIG. 28 is a right side view thereof, and FIG. 29 is a front view. Even in this air compressor 10 which is inverted by 90 ° from the embodiment of FIG. 4, the basic configuration and the arrangement relationship of the component parts are almost the same as those described above.

As the air take-out unit 10C, the one shown in FIG. 6 (configuration example 1) was adopted. As a result, the air outlet 38 of the air outlet 10C is arranged so as to face between the tanks 21A and 21B (the space facing the tank). The drain pipe line 22 is piped near the air take-out portion 10C, and the drain cock 25 is arranged near the secondary cylinder 15B.

In this configuration, since the tank pitch becomes slightly wider as shown in FIG. 29, the inverter board 10D is placed and fixed on the connecting plate 20 which is the lower surface of the air take-out portion 10C and faces the tank facing space. NS.

When the compressor 10A is arranged so that the motor shaft is parallel to the tank shaft and the cylinder is orthogonal to the tank shaft in this way, it is in the space where the tanks 21A and 21B face each other, and is on the lower surface side of the compressor 10A. Since the inverter board 10D can be arranged in the space and the mounting position of the compression motor 12 can be lowered, the height (total height) of the air compressor body can be shortened.

The present invention is suitable for application to a construction air compressor used at construction sites such as various construction sites and remodeling sites.

10 ・ ・ ・ Air compressor 10A ・ ・ ・ Compressor 10B ・ ・ ・ Tank part 10C ・ ・ ・ Air take-out part 10D ・ ・ ・ Inverter board 10E ・ ・ ・ Operation part 10F ・ ・ ・ Main body cover 38 ・ ・ ・ ・ Air take-out Mouth 60 ・ ・ ・ Leg

Claims (9)

A tank section that has multiple tanks and stores compressed air,
A compressor for generating compressed air mounted on the upper part of the tank,
It is equipped with a plurality of air take-out parts for taking out compressed air from the tank part.
The air take-out portion is provided in each of the pair of the tanks facing each other, and is derived from the oblique peripheral surface and is also derived.
The pair of the air take-out portions have an air take-out port and a pipeline provided with the air take-out port, so that when the air compressor main body is viewed from the front, the pipe line is closer to the center of the air compressor main body. An air compressor characterized in that it is arranged so as to be inclined with respect to the tank in a direction facing each other with respect to the center of the air compressor main body. The air compressor according to claim 1, wherein the air take-out unit is arranged near the center of the compressor body when the air compressor body is viewed from the front. The air compressor according to claim 1, wherein the air take-out port provided in the air take-out portion is arranged closer to the center of the air compressor main body than the vertical surface passing through the central axis of the tank. The air compressor according to claim 1, wherein the air take-out port provided in the air take-out portion is arranged in a space where the tank and the tank face each other. The compressor is composed of a cylinder for compression and a motor for driving the cylinder.
The air compressor according to claim 1, wherein an inverter substrate for driving and controlling the motor is mounted in a space existing between the cylinder and the motor. The compressor has a first cylinder and a second cylinder for compression arranged along the longitudinal direction of the elongated tank.
A drain pipe for draining drain is connected between the above tanks,
The air compressor according to claim 1, wherein the drain pipe is arranged along the second cylinder different from the first cylinder adjacent to the air take-out portion. A drain pipe for draining drain is connected between the above tanks,
The air compressor according to claim 1, wherein the drain cock connected to the drain pipe is arranged at a position adjacent to the air take-out portion. The air compressor according to claim 1, wherein an air connecting pipe communicating between the tanks is provided in the upper part of the pipeline of the air take-out portion. A pressure reducing valve and a pressure gauge are provided in the air extraction section.
The air compressor according to claim 1, wherein the pressure reducing valve and the pressure gauge are arranged on an axis toward the center of the tank.

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