JP2014199000A - Portable air compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent damage to mount members to keep vibration isolating performance by using a simple and inexpensive structure.SOLUTION: A portable air compressor 101 comprises: an air compressor body including a motor, an air compression mechanism driven by the motor, a tank part 4 that stores compressed air generated by the air compression mechanism, and a cover 8 that covers the air compression mechanism; a plurality of rubber feet 7 that support the air compressor body with respect to a floor surface and in which at least a portion is made of an elastic body; and auxiliary mount members 61 that can support the air compressor body with respect to the floor surface.

Description

  The present invention relates to an air compressor that generates compressed air necessary for driving a pneumatic tool such as a nailing machine, and more particularly to a portable air compressor that can be transported and moved with a handle. is there.

  In construction sites and the like, pneumatic tools that drive nails and screws into wood with compressed air pressure are widely used, and portable air compressors are used to drive these pneumatic tools and the like.

  FIG. 9 shows an example of this type of portable air compressor. The portable air compressor 1 includes a drive source such as a motor, an air compression mechanism driven by the drive source, and the air compression mechanism. The tank part 4 which stores the produced | generated compressed air, the handle 6 for carrying, the rubber | gum leg 7 for vibration-proof support which is a mount member, the cover 8, and the compressed air outlet 11 are comprised. The handle 6 is fixed to a frame (not shown) connecting the two air tanks 41 of the tank unit 4, and the cover 8 is fixed to the handle 6. A pressure reducing valve 12 is provided between the take-out port 11 side and the tank part 4, and has a function of reducing the pressure inside the tank part 4 to a pressure suitable for driving the air tool. A pressure gauge 13 is attached in the vicinity of the outlet 11 so that the pressure taken out from the outlet 11 can be monitored. An operation panel 50 is provided on the upper surface of the air compressor 1, and a power switch 51 is provided here. The power switch 51 is provided to turn on and off the commercial AC power supplied to the air compressor 1 from a power cord (not shown).

  The rotary motion of the rotary output shaft of the drive source is converted to the reciprocating motion of the piston in the cylinder via the crank shaft of the air compression mechanism, and the air sucked from the intake valve of the cylinder is compressed by the reciprocating motion of the piston Is done. The compressed air compressed in the cylinder is discharged from the exhaust valve of the cylinder through the pipe to the air tank 41, stored in the air tank 41, and this is depressurized to a predetermined pressure and supplied to the outlet 11.

  Moreover, when compressing gas to a high pressure, a multistage reciprocating compressor that increases the pressure stepwise is generally used. Such an air compressor is disclosed in Patent Document 1 below, for example.

JP 2009-185648 A

  In the conventional portable air compressor, the air compressor main body (including the tank unit 4 and the drive source and the air compression mechanism mounted thereon) vibrates greatly due to vibration caused by the reciprocating motion of the piston. A flexible rubber mount member for vibration-proofing support is disposed on the grounding portion with the mounting surface. When operating a portable air compressor, use it without placing any objects on it. However, if a heavy object is loaded on the portable air compressor during transportation or storage, the flexible mounting member will be excessive. There is a possibility that the load acts, the mount member is damaged, and a sufficient vibration isolation effect cannot be obtained. In many cases, a portable air compressor is loaded with a load on an upper part during on-vehicle transportation or storage, and it is important to protect the mount member.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a portable air compressor capable of preventing damage to a mount member and maintaining vibration-proof performance with a simple and inexpensive configuration. It is to provide.

One embodiment of the present invention is a portable air compressor. The portable air compressor includes a drive source, an air compression mechanism driven by the drive source, and a tank unit that stores compressed air generated by the air compression mechanism. An air compressor body to which the drive source and the air compressor mechanism are attached, a cover that covers at least the upper part of the air compressor body, a handle attached to the air compressor body, and a mounting surface for the air compressor body In a configuration having a plurality of mounting members that are at least partially supported by an elastic body,
An auxiliary mount member capable of supporting the air compressor body with respect to the mounting surface when a load is applied to the air compressor body, the cover, the handle, the tank, or a frame fixed to the tank It is provided in at least one of the above.

  The said aspect WHEREIN: The said auxiliary | assistant mount member is good to be supported so that a movement in the direction separated and grounded with respect to the mounting surface is possible.

  The said aspect WHEREIN: It is good to provide the biasing means which urges | biases the said auxiliary | assistant mount member in the direction spaced apart from the mounting surface mentioned above.

  In the above aspect, the cover may be integrally and movably supported by the auxiliary mount member.

  In the above aspect, the handle may be supported integrally with the auxiliary mount member so as to be movable.

  The said aspect WHEREIN: It is good to provide the drive means to move the said auxiliary | assistant mount member to the up-down direction of the said air compressor main body.

  In the above aspect, the mount member may be biased so as to protrude downward from the auxiliary mount member.

  The said aspect WHEREIN: It is good for the said cover to have the upper surface which receives a load.

  The said aspect WHEREIN: The said handle | steering-wheel upper end position is in a position higher than the said cover, and it is good to comprise the support point or support surface which receives a load.

  It should be noted that any combination of the above-described constituent elements, and those obtained by converting the expression of the present invention between methods and systems are also effective as aspects of the present invention.

  According to the present invention, for example, when a load from above is applied, for example, when a load is loaded on the upper part of the portable air compressor, the auxiliary mount member can be grounded to support the load. Therefore, it is possible to prevent excessive deformation and damage and maintain vibration-proof performance.

The perspective view which shows 1st Embodiment of the portable air compressor which concerns on this invention. FIG. It is 1st Embodiment, Comprising: (A) is a front view at the time of a raise of an auxiliary mount member, (B) is a front view at the time of the descent of an auxiliary mount member. The perspective view which shows 2nd Embodiment of the portable air compressor which concerns on this invention. It is 2nd Embodiment, Comprising: The side view which fractures | ruptures and shows a part of portable air compressor. The front view which shows 3rd Embodiment of the portable air compressor which concerns on this invention. 3A is a cross-sectional view of a main part when a rubber foot as a mounting member protrudes downward from an auxiliary mount member, and FIG. 3B is a cross-sectional view of a main part when the auxiliary mount member is grounded. Figure. The principal part sectional view showing a 4th embodiment of the portable air compressor concerning the present invention. The perspective view which shows an example of the conventional portable air compressor.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In addition, the same code | symbol is attached | subjected to the same or equivalent component, member, process, etc. which are shown by each drawing, and the overlapping description is abbreviate | omitted suitably. In addition, the embodiments do not limit the invention but are exemplifications, and all features and combinations thereof described in the embodiments are not necessarily essential to the invention.

<First Embodiment>
A first embodiment of a portable air compressor according to the present invention will be described with reference to FIGS. As shown in these drawings, the portable air compressor 101 stores a motor 2 that is a driving source, an air compression mechanism 3 that is driven by the motor 2 to generate compressed air, and a compressed air that is generated by the air compression mechanism 3. A tank circuit 4 for controlling the motor 2, a control circuit unit 5 for controlling the operation of the motor 2, a handle 6 for carrying, and a rubber foot 7 for vibration-proofing support which is a mount member.

  The tank unit 4 is obtained by mechanically connecting and fixing two air tanks 41, and the motor 2 and the air compression mechanism 3 are mounted on the tank unit 4. Here, a portion including the tank portion 4 and the motor 2 and the air compression mechanism 3 mounted thereon is referred to as an air compressor body.

  An auxiliary mount member 61 is molded integrally with the handle 6 (for example, resin molding) on the handle 6, and the auxiliary mount member 61 has an elastic body 62 for protecting the floor surface (mounting surface) on the grounding portion. doing. The handle 6 is attached to a frame (not shown) connecting the two tanks 41 of the tank unit 4 so as to be movable in the vertical direction of the main body. Specifically, as shown in FIGS. 3A and 3B, a vertical hole 6c is formed in the mounting base 6a of the handle 6 and is screwed to the frame through the long hole 6c. The mounting base portion 6a is attached by a bolt 65 so as to be movable in the vertical direction. A cover 8 that covers both side surfaces and the upper surface of the air compressor body is fixed to the handle 6 and can be moved up and down integrally with the handle 6. The cover 8 has a flat surface 8a capable of receiving a load on the upper surface. 3A, the lower end of the handle 6 is at the height H from the floor surface. In the lowered position of the auxiliary mount member 61 of FIG. 3 (B), the lower end can be grounded to the floor surface.

  An operation panel 50 is provided on the upper surface of the air compressor body, and a power switch 51 is provided here. The power switch 51 is provided to turn on and off the commercial AC power supplied to the air compressor 101 from a power cord (not shown), and drive power for the control circuit unit 5 and the motor 2 is supplied via the power switch 51. It comes to supply.

  The motor 2 has a rotor 21, a stator 22, and a rotation shaft 23 that rotates integrally with the rotor 21, and the rotation operation is controlled by the control circuit unit 5. A cooling fan 24 is provided at one end of the rotating shaft 23.

  The air compression mechanism 3 includes a crankcase 31, a low pressure side connecting rod 33a having a low pressure side piston 32a, a high pressure side connecting rod 33b having a high pressure side piston 32b, a low pressure side cylinder 34a, and a high pressure side cylinder 34b, and the low pressure side piston 32a. The low pressure side cylinder 34a forms a low pressure side compression chamber 35a, and the high pressure side piston 32b and the high pressure side cylinder 34b form a high pressure side compression chamber 35b. The upper walls of the compression chambers 35a and 35b are provided with an unillustrated intake valve for flowing air into the compression chamber and an unillustrated discharge valve for allowing compressed air to flow out only in one direction. It functions as a check valve that allows air to flow through. An intake passage (not shown) is connected to the intake valve side of the low-pressure side compression chamber 35a, and the discharge valve side of the low-pressure side compression chamber 35a and the intake valve side of the high-pressure side compression chamber 35b are connected by a pipe 9a. The discharge valve side of the high pressure side compression chamber 35b is communicated with the tank portion 4 by a pipe 9b.

  Inside the low pressure side connecting rod 33a and the high pressure side connecting rod 33b, a low pressure side crank arm 36a and a high pressure side crank arm 36b are arranged via bearings 37, respectively. The low-pressure side crank arm 36a and the high-pressure side crank arm 36b are eccentrically attached to the rotary shaft 23, and convert the rotary motion of the rotary shaft 23 into the reciprocating motion of the low-pressure side piston 32a and the high-pressure side piston 32b. The rotating shaft 23 is provided with a balancer 38 for canceling the unbalanced load of the crank arm and piston. The air compression mechanism 3 is elastically coupled to an unillustrated frame that couples the two air tanks 41 of the tank unit 4 via an unillustrated elastic member.

  The tank unit 4 that stores the compressed air generated by the air compression mechanism 3 includes, for example, a pair of cylindrical air tanks 41 arranged in parallel, and is communicated by a pipe 9c. In addition, a safety valve (not shown) is attached to a part of the tank part 4, and when the pressure in the tank part 4 becomes abnormally high, a part of the compressed air is discharged to the outside. Abnormal pressure rise is prevented.

  The tank portion 4 is provided with a pair of compressed air outlets 11, and an air tool (not shown) such as a nailing machine is connected to each of the outlets 11 via a hose. A pressure reducing valve 12 is provided between the take-out port 11 side and the tank part 4, and has a function of reducing the pressure inside the tank part 4 to a pressure suitable for driving the air tool. A pressure gauge 13 is attached in the vicinity of the outlet 11 so that the pressure taken out from the outlet 11 can be monitored.

  Next, the production | generation process of the compressed air by the portable air compressor 101 is demonstrated roughly. The rotational motion of the motor 2 is transmitted to the rotary shaft 23, and rotates the low-pressure side crank arm 36a and the high-pressure side crank arm 36b. When the low-pressure side crank arm 36a rotates eccentrically, the low-pressure side piston 32a inscribed in the low-pressure side cylinder 34a is converted into a reciprocating motion. Similarly, when the high-pressure side crank arm 36b is eccentrically rotated, the high-pressure side piston 32b inscribed in the high-pressure side cylinder 34b is converted into a reciprocating motion.

  In the intake process in which the pistons 32a and 32b move downward from the top dead center to the bottom dead center in the cylinders 34a and 34b, external air is sucked into the compression chambers 35a and 35b. On the other hand, in the compression process in which the pistons 32a and 32b move upward from the bottom dead center to the top dead center in the cylinders 34a and 34b, the pistons 32a and 32b compress the air in the compression chambers 35a and 35b to generate compressed air. To do.

  When the low pressure side piston 32a is at the top dead center, the high pressure side piston 32b is at the bottom dead center. When the low pressure side piston 32a is at the bottom dead center, the high pressure side piston 32b is at the top dead center. That is, when the low pressure side is the compression process, the high pressure side is the intake process, and when the low pressure side is the intake process, the high pressure side is the compression process. The low pressure side compression chamber 35a, the high pressure side compression chamber 35b, the high pressure compression chamber 35b, and the tank portion 4 are connected by a pipe. First, atmospheric pressure air flowing in from an unillustrated intake passage in the low-pressure side compression chamber 35a is compressed to about 0.7 MPa. The compressed air generated in the low pressure side compression chamber 35 a is compressed to about 4.5 MPa in the high pressure side compression chamber 35 b and discharged to the tank unit 4. By repeating the above steps, predetermined compressed air is stored in the tank portion 4. The air compressor 101 that drives a pneumatic tool or the like boosts the pressure by the two-stage compression process as described above.

  The air compression mechanism 3 vibrates due to the reciprocating motion of the pistons 32a and 32b described above, and the vibration is transmitted to the tank unit 4 so that the entire air compressor 101 vibrates. In order to reduce the transmission of vibration to the floor, the air compressor 101 is supported by providing four rubber feet 7 (on the front, rear, left and right sides of the tank unit 4), which are mount members made of an elastic body.

  On the other hand, the portable air compressor 101 is often loaded with luggage or the like on the upper surface during transportation or storage on the vehicle. If these loads act excessively, the rubber feet 7 may be damaged such as buckling or tearing, and it may not be possible to obtain sufficient vibration isolation performance. In the portable air compressor 101 of the present embodiment, during normal operation, as shown in FIG. 3a, the auxiliary mount member 61 is separated from the floor surface, only the rubber feet 7 are grounded, and the air compressor body is protected. It is supported. In addition, when a load or the like is loaded using the upper surface of the cover 8 or the handle 6 during in-vehicle transportation or storage, the auxiliary mount member 61 is grounded to the floor surface and is upward as shown in FIG. Therefore, an excessive load does not act on the rubber foot 7, and the rubber foot 7 can be protected and the vibration-proof performance can be maintained. Furthermore, it is possible to prevent the floor surface from being damaged by disposing the elastic body 62 at the grounding portion of the auxiliary mount member 61.

  The auxiliary mount member 61 supports the air compressor body when a predetermined load or more is applied. Depending on the strength of the elastic body 62, the distance between the auxiliary mount member 61 and the floor surface, etc. A load applied to the air compressor body when the auxiliary mount member 61 is in contact with the floor surface is set. The predetermined load can be set as appropriate, and can be set, for example, as “5 kg or more” or “what weight% or more of the air compressor body”.

  Further, when the handle 6 is gripped to move the air compressor 101 to the work place, the auxiliary mount member 61 moves in a direction away from the floor surface due to the weight of the air compressor 101, so that the air compressor 101 is operated. In this case, the rubber feet 7 are grounded, and vibration isolation support is possible.

  Even if the auxiliary mount member 61 is in the lowered position and is grounded during operation of the air compressor 101, there is no load on the upper surface of the cover 8 or the handle 6 during operation. Antivibration support by the rubber feet 7 that are grounded is effective.

  According to the present embodiment, the following effects can be achieved.

(1) When a load from above is applied, such as when a load is loaded on the top of the portable air compressor 101, the auxiliary mount member 61 can contact the floor and support the load. As a result, it is possible to prevent excessive deformation and damage of the rubber foot 7 and to maintain the vibration-proof performance.

(2) The auxiliary mount member 61 is integral with the handle 6 and has a cover 8 attached thereto, which is attached to the frame of the air compressor main body (the frame connecting the two tanks 41 of the tank unit 4). On the other hand, it is attached so as to be movable in the vertical direction (the direction in which the floor is separated and grounded). For this reason, even if the auxiliary mount member 61 is in contact with the floor surface when the air compression mechanism 101 is used, the vibration isolation performance of the rubber foot 7 is hardly impaired.

<Second Embodiment>
A second embodiment of the portable air compressor of the present invention will be described with reference to FIGS. In the portable air compressor 102, handle support portions 42 are fixedly provided at both longitudinal end surfaces of the two tanks 41 of the tank portion 4 (for example, welding), and the handle 6 is attached to the handle support portion 42 with air The compressor body is arranged so as to be movable in the vertical direction. The handle 6 integrally includes an auxiliary mount member 61 and is urged in a direction away from the floor surface by a spring (compression spring) 63 as urging means disposed inside the handle. The cover 8 is fixed to the handle 6 via a connecting portion 68 that is integral with the handle 6. The height position of the handle upper end surface 6b is higher than the cover 8, so that a support point or a support surface for receiving the load can be configured. Other configurations are the same as those in the first embodiment.

  In this second embodiment, when a load or the like is loaded using the upper surface of the cover 8 or the handle 6, the spring 63 is compressed and the auxiliary mount member 61 is grounded to the floor surface to support the load from above. . For this reason, an excessive load does not act on the rubber foot 7, and it is possible to protect the rubber foot 7 and maintain the vibration isolation performance.

  On the other hand, by removing the loaded luggage and the like, the spring 63 extends and the auxiliary mount member 61 moves away from the floor surface. Therefore, the rubber foot 7 is grounded when the portable air compressor 102 is operated. In addition, vibration isolation support is possible.

  In the case of the second embodiment, since the auxiliary mount member 61 is biased by the spring 63 in the direction away from the floor surface, the auxiliary mount member 61 does not act during the operation of the air compression mechanism 102, and the rubber The anti-vibration function of the foot 7 can be made effective. Further, the upper end position of the handle 6 is higher than the cover 8 and constitutes a support point or a support surface for receiving the load. For this reason, it is convenient during transportation and storage.

<Third Embodiment>
A third embodiment of the portable air compressor of the present invention will be described with reference to FIGS. In the portable air compressor 103, rubber foot holders 81 for constituting auxiliary mount members are provided on the front and rear sides of the lower portions of the two tanks 41 of the tank unit 4, and rubber feet as mount members are provided on the inside thereof. 71 is provided. That is, the mounting frame 70 is fixed to the outer side of the lower portion of the tank 41 by welding or the like, and the rubber foot holder 81 and the rubber foot 71 whose lower portion has a cylindrical shape are attached to the frame 70 with the bolts 91.

  The rubber foot 71 has a recess 72 that opens to the bottom surface. The frame 70 and the rubber foot holder 81 each have a substantially horizontal contact surface. The bolt 91 passes through the abutting surface of the washer 92, the ceiling of the recess 72 of the rubber foot 71, the washer 93, the spring 94, the rubber foot holder 81 and the frame 70. Processing has been applied. A sleeve 95 is fitted on the outer periphery of the bolt 91 between the washer 92 and the ceiling surface of the rubber foot holder 81 so that the bolt 91 does not move in the vertical direction. The spring 94 is a compression spring provided on the outer side of the sleeve 95 and urges the rubber foot 71 to protrude from the rubber foot holder 81, that is, downward. An elastic body 82 is attached to the lower edge of the rubber foot holder 81, and these constitute an auxiliary mount member.

  Other configurations may be the same as those in the first embodiment, but the handle 6 and the cover 8 are fixed to a frame connecting the tanks 41 to each other.

  In the third embodiment, when a load or the like is loaded on the portable air compressor 103, the rubber foot holder 81 constituting the auxiliary mount member is compressed by the spring 94 as shown in FIG. 7B. The elastic body 82 on the side contacts the floor and supports a load from above. For this reason, an excessive load does not act on the rubber foot 71 as the mount member, and the rubber foot 71 can be protected and the vibration-proof performance can be maintained.

  On the other hand, by removing the loaded luggage and the like, the amount of compression of the spring 94 is reduced, and the elastic body 82 on the rubber foot holder 81 side moves away from the floor surface. During operation, the rubber feet 71 are grounded, and vibration isolation support is possible.

<Fourth embodiment>
A fourth embodiment of the portable air compressor of the present invention will be described with reference to FIG. In this case, the attachment structure of the rubber feet 71 to the attachment frame 70 is different from that of the third embodiment. That is, the spring connecting member 96 is fixed to the ceiling surface of the rubber foot holder 81 with the bolt 97 that penetrates the substantially horizontal contact surface of the frame 70 and the rubber foot holder 81. The upper portion of the rubber foot 71 and the spring connecting member are connected by a large diameter spring 98. Other configurations are the same as those of the third embodiment described above.

  Also in the fourth embodiment, when there is no load on the portable air compressor, the amount of compression of the spring 98 is small and the elastic body 82 on the rubber foot holder 81 side is the floor as shown in FIG. Separated from the surface. As a result, the vibration isolation support by the rubber feet 71 is possible. On the other hand, when a load is placed on a portable air compressor during transportation or storage, the elastic body 82 on the rubber foot holder 81 side can contact the floor and protect the rubber feet 71.

  The present invention has been described above by taking the embodiment as an example. However, it is understood by those skilled in the art that various modifications can be made to each component and each processing process of the embodiment within the scope of the claims. By the way. Hereinafter, modifications will be described.

  In the first or second embodiment of the present invention, driving means for moving the auxiliary mount member 61 in the vertical direction may be provided. In this case, for example, an actuator such as an electromagnetic plunger can be used in place of the spring 63 of the second embodiment.

  In the first to fourth embodiments of the present invention, the specific shapes of the mount member and the auxiliary mount member are exemplified, but their shapes and materials are arbitrary. Moreover, although the handle | steering-wheel was provided in the both end surface side of the longitudinal direction of a tank, this invention is applicable also to handle arrangement | positioning along a longitudinal direction.

  The mounting position of the auxiliary mount member may be at least one of a cover, a handle, a tank, or a frame fixed to the tank.

DESCRIPTION OF SYMBOLS 1,101,102,103 Portable air compressor 2 Motor 3 Air compression mechanism 4 Tank part 5 Control circuit part 6 Handle 6a Mounting base 6b Handle upper end surface 6c Elongate hole 7, 71 Rubber foot 8 Cover 8a Flat surface 9a, 9b 9c Piping 11 Compressed air outlet 12 Pressure reducing valve 13 Pressure gauge 21 Rotor 22 Stator 23 Drive shaft 24 Fan 31 Crankcase 32a Low pressure side piston 32b High pressure side piston
33a Low pressure side connecting rod 33b High pressure side connecting rod 34a Low pressure side cylinder 34b High pressure side cylinder 35a Low pressure side compression chamber 35b High pressure side compression chamber 36a Low pressure side crank arm 36b High pressure side crank arm 37 Bearing 38 Balancer 41 Air tank 42 Handle support section 50 Operation panel 51 Power switch 61 Auxiliary mount member 62, 82 Elastic body 63, 94, 98 Spring 65, 91, 97 Bolt 70 Mounting frame 81 Rubber foot holder

Claims (9)

A drive source; an air compression mechanism driven by the drive source; and a tank portion that stores compressed air generated by the air compression mechanism, wherein the drive source and the air compression mechanism are in the tank portion. The attached air compressor body,
A cover covering at least the upper part of the air compressor body;
A handle attached to the air compressor body;
In the portable air compressor having a plurality of mount members each of which is formed of an elastic body that supports the air compressor body with respect to the mounting surface,
An auxiliary mount member capable of supporting the air compressor body with respect to the mounting surface when a load is applied to the air compressor body, the cover, the handle, the tank, or a frame fixed to the tank A portable air compressor provided in at least one of the above.   2. The portable air compressor according to claim 1, wherein the auxiliary mount member is supported so as to be movable in a direction in which the auxiliary mount member is separated from and grounded with respect to the mounting surface.   The portable air compressor according to claim 2, further comprising an urging unit that urges the auxiliary mount member in a direction away from the placement surface.   The portable air compressor according to claim 2 or 3, wherein the cover is integrally and movably supported with the auxiliary mount member.   The portable air compressor according to any one of claims 2 to 4, wherein the handle is integrally and movably supported with the auxiliary mount member.   The portable air compressor according to any one of claims 2 to 5, further comprising driving means for moving the auxiliary mount member in a vertical direction of the air compressor body.   The portable air compressor according to claim 1, wherein the mount member is biased so as to protrude downward from the auxiliary mount member.   The portable air compressor according to any one of claims 1 to 7, wherein the cover has an upper surface for receiving a load.   The portable air compression according to any one of claims 1 to 8, wherein an upper end position of the handle is higher than the cover and constitutes a support point or a support surface for receiving a load. Machine.

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