JPH0329099Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a portable polishing machine for smoothing the surface of a steel plate or the like using an endless polishing belt.

2. Description of the Related Art Conventionally, a portable polishing machine is known in which a drive unit for an endless polishing belt is mounted on a movable carriage and polishes the surface of a steel plate or the like while moving the belt. A conventional portable sanding machine has a wheeled movable dolly with a hand-pushed handle on the rear surface, and a contact wheel is rotatably supported horizontally on the lower surface of the rear and a drive pulley is supported on the upper surface of the front part. A tension pulley is rotatably supported horizontally in the upper center via a tension adjustment mechanism, and a drive motor connected to the drive pulley is mounted on a movable trolley close to the drive pulley, and the drive pulley, contact wheel, and tension pulley are connected to the drive pulley. An endless abrasive belt is stretched between the shock pulleys, and the abrasive belt is driven to run toward the front of the movable cart on the lower surface of the contact wheel.

Problems to be Solved by the Invention Conventional portable sanders do not have dust collectors. The reason for this is that when a dust collector is installed, a small dust collector using a household vacuum cleaner is installed due to space constraints and weight reduction. Because the target object is grinding powder (red-hot grinding powder) that has become extremely hot due to the heat of grinding, the filter burns out, and the dust collector motor is cooled by the grinding powder, making it unusable. There was a problem. In addition, since the above-mentioned portable grinder does not have a dust collector, grinding powder adheres and accumulates on the underside of the movable cart, hindering movement.
In addition, workers will inhale harmful gases such as oil smoke generated during grinding, which is unfavorable from a sanitary standpoint.

Means for Solving the Problems The present invention was proposed in view of the above-mentioned problems, and includes a contact wheel 6 on the lower rear surface of a wheeled movable trolley 1 having a manual handle 42 on the rear surface, and a contact wheel 6 on the lower surface of the front upper surface. Drive pulleys 4 are rotatably supported horizontally on the respective sides, and a tension pulley 5 is rotatably supported horizontally on the center upper part of the movable cart 1 via a tension adjustment mechanism 13.
A drive motor 3 connected to the drive pulley 4 is mounted on a movable cart 1 close to the drive pulley 4,
Contact wheel 6 and tension pulley 5
An endless abrasive belt 7 is stretched between them, and the abrasive belt 7 is moved on the lower surface of the contact wheel 6 on the cart 1.
A portable grinding machine that is driven to travel forward, includes a dust collector main body 8 having a dust collection box with a filter and an intake air generating means, and a grinding flame connected to the dust collection box via an intake pipe 31. A powder separation and recovery box 9 is installed on the movable trolley 1 with the separation and recovery box 9 facing forward, while the abrasive belt 7, which is stretched between the contact wheel 6 at the rear and the drive pulley at the front, A grinding powder collection duct 10 which is wider than the belt width and has a longer length is arranged along the lower surface in the front-rear direction of the movable cart 1, and the tip opening 36 of the duct 10 is arranged opposite to the front of the contact wheel 6. In addition, a saucer member 39 is pivotally attached to the tip opening 36 so as to be able to adjust the angle vertically toward the contact wheel 6, and the rear end of the duct 10 is detoured in a U-shape to open the separation and collection box 9. It is connected to.

Function: An operator presses the portable grinder of the present invention on the object to be ground while pressing the contact wheel on the lower rear surface against the surface of the object to perform polishing. is scattered towards the front of the contact wheel, which is sucked and collected by a grinding powder collection duct that is wider than the belt width. First, coarse grinding powder is separated in a separation and collection box in the previous stage.
In addition, the dust collector itself separates and collects harmful gases such as oil smoke and fine dust generated during grinding, allowing the grinding work to be carried out hygienically. By pivotally attaching the saucer member to the tip of the grinding powder collection duct so that it can swing up and down, the lower surface of the tip opening of the duct can be brought into close contact with the surface of the workpiece to be ground, thereby creating a gap. figure,
Grinding powder generated at the contact wheel and blown forward can be almost completely suctioned and collected. In addition, the duct is arranged to extend long in the front and back direction of the mobile cart, and is introduced into the separation and collection box in a U-turn shape, allowing the grinding powder to be sufficiently cooled in between. By the time it flows in, the adhesion effect is gone, and the coarse grinding powder collides with the baffle plate, loses its flow energy, and falls downward and separates, so it does not burn out the filter inside the dust collector body.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 3. In the drawing, 1 is a moving cart equipped with wheels 2, 2, 3 is a drive motor mounted on the moving cart 1, 4 is a drive pulley, 5 is a tension pulley, 6 is a contact wheel, 7 is an endless abrasive belt, 8 is a dust collector body having a dust collection box with a filter and an air intake generation means; 9 is a separation and collection box for grinding powder; 10
is the grinding powder collection duct.

The drive pulley 4 is rotatably supported on the front upper surface of the movable cart 1. In other words, the moving trolley 1
A rotary shaft 11 is rotatably supported on the upper front surface of the movable cart 1 via a bearing stand (not shown), and a drive pulley 4 is fixed to one end of the rotary shaft 11 so as to protrude from one side of the front portion of the movable cart 1. There is. The other end of the rotating shaft 11 has a V
A belt pulley is fixedly attached and is rotationally driven from an output shaft 3a of a drive motor 3 via a V-belt 12. The rotating shaft 11 is the output shaft 3a of the drive motor 3.
is placed parallel to.

The tension pulley 5 is rotatably supported approximately at the upper center of the movable carriage 1 via a tension adjustment mechanism 13. Although various configurations can be adopted for the tension adjustment mechanism 13, the embodiment shown in the drawings uses support rods 14, 14 fixed upright on the movable trolley 1.
A mounting body 15 and a support plate 16 are bridge-fixed to approximately the center and upper ends of the mounting body 15, and guide rods 17,
17 is passed through the guide rod so as to be vertically movable and held upright, and a support shaft 1 is attached to the upper end of the guide rods 17, 17.
An elevating body 19, which rotatably supports a tension pulley 5 via a shaft 8, is fixed to the bridge. A tension adjustment screw shaft 20 screwed through the mounting body 15 is rotatably supported by an elevating body 19 and a support plate 16. In addition, springs 21, 21 are wound around the guide rods 17, 17 and compressed between the mounting body 15 and the elevating body 19, so that the elevating body 19, which pivotally supports the tension pulley 5, is constantly urged upward. .
An adjustment handle 22 is attached to the upper end of the tension adjustment screw shaft 20, and the adjustment handle 22 rotates the tension adjustment shaft 20 in forward and reverse directions, and the elevating body 19 is always urged upward by springs 21, 21.
to raise and lower. The tension pulley 5 is provided parallel to the drive pulley 4.

The contact wheel 6 is rotatably supported on the rear lower surface of the movable cart 1. That is, a support bracket 23 is provided on the rear lower surface of the movable trolley 1 so as to project diagonally backward, and a bearing body 25 rotatably supports the rotating shaft 24 at the tip of the support bracket 23.
A contact wheel 6 is fixed to one end of the rotating shaft 24 and supported on one side of the rear part of the movable cart 1 in parallel with the drive pulley 4.

The endless abrasive belt 7 is connected to the drive pulley 4,
Tension pulley 5 and contact wheel 6
The drive motor 3 drives the contact wheel 6 to run forward on the lower surface of the contact wheel 6 .

The dust collector main body 8 is installed on a mounting plate 27 which is installed substantially parallel to the movable dolly 1 between the upper ends of support brackets 26a and 26b erected on the top surface of the movable dolly 1. The dust collector main body 8 has a cylindrical housing 2
A lid 29 is elastically attached to the upper opening of the housing 8 , and a discharge port 30 for separating air from which dust has been removed is formed between the housing 28 and the lid 29 . The separation and collection box 9 is cantilevered on the upper part of the support bracket 26a, and is disposed in front of the dust collector main body 8, and is connected to the dust collection box of the dust collector main body 8 via an intake pipe 31. Inside the separation and recovery box 9, there is a baffle plate 3 facing the suction port 32.
3 is provided vertically, and the grinding powder particles flowing in from the suction port 32 collide with the baffle plate 33 and fall downward to be separated. A powder collection chamber 34 is provided at the bottom of the separation and collection box 9, and when a certain amount of powder accumulates in the collection chamber 34, the lid 34a of the collection chamber 34 is opened forward to take out and collect the powder. . Note that the lid 34a
When the polishing machine is in use, it is locked and fixed by an appropriate locking means. The collection chamber 34 is of an extraction type, and can normally be secured and fixed with a clip or the like. The grinding powder collection duct 10 is wider than the width of the abrasive belt 7, and the abrasive belt 7 is stretched between the contact wheel 6 and the drive pulley 4.
It is arranged along the lower surface of the vehicle and is attached to the movable trolley 1 using a bracket 35 as appropriate. The tip opening 36 of the grinding powder recovery duct 10 is disposed opposite to the front of the contact wheel 6, and the rear end 37 is
The suction port 3 of the separation and recovery box 9 is detoured in a shape of
It is connected to 2. As shown in FIG. 4, a cutout window 38 is formed in the bottom wall 36a near the tip opening 36 of the grinding powder recovery duct 10, and a cutout window 38 is formed in the opening edge 38a of the cutout window 38. The end edge of the inserted gutter-shaped saucer member 39 is attached so as to be drivable by a hinge 40, and the saucer member 39 is held projecting toward the contact wheel 6 so that its angle can be adjusted.

A bracket 41 is attached to the upper surface of the rear end of the movable cart 1, and an operating handle 42 is attached to this bracket 41.
It is attached via a pivot 43 to be able to adjust its inclination position by appropriate means. 44 is an operation panel attached to the operation handle 42; 45 is a cover that extends over the drive motor 3 and drive pulley 4 and covers the V-belt 12; 46;
is a guard member disposed along the upper surface of the abrasive belt 7 that is stretched around the drive pulley 4, tension pulley 5, and contact wheel 6, and this guard member 46 prevents the worker from coming into contact with the abrasive belt 7. . Reference numeral 47 denotes a hook used when transporting the polishing machine. This hook 47 is attached to the upper end of the support bracket 26a above the overall center of gravity via a support shaft 48, and is stored below when not in use. , Rotate and hold it upright when in use.

When grinding and polishing an object to be polished such as a steel plate, the polishing machine is moved forward while being pushed on the object to be polished, and at the same time, the drive motor 3 moves the polishing belt 7 on the underside of the contact wheel 6. The vehicle is driven forward. Then, the contact wheel 6 moves while being pressed against the object to be ground, and the object to be ground is ground and polished. The grinding powder generated during this grinding and polishing scatters toward the front of the contact wheel 6, and is sucked and collected by the suction force of the dust collector main body 8 into the tip opening 36 of the grinding powder recovery duct 10 via the saucer member 39. and flows into the separation and collection box 9 through the collection duct 10,
It collides with the baffle plate 33 in the box 9. At this time, since the grinding powder collection duct 10 is arranged to extend long in the front and back direction, the grinding powder is sufficiently cooled while moving through the collection duct 10, and when it flows into the separation and collection box 9, it has an adhesion effect. When colliding with the baffle plate 33, the coarse grinding powder particles are easily separated and fall into the powder collection chamber 34. The residual powder particles, etc. from which the coarse grinding powder particles have been separated, pass through the intake pipe 31 together with the oil smoke generated during grinding, and then flow into the dust collection box equipped with a filter in the dust collector main body 8 and are filtered by the filter. Only the air is discharged to the outside from the discharge port 30 between the housing 29 and the lid 30. Incidentally, since a saucer member 39 is pivotally attached to the tip of the grinding powder recovery duct 10 so as to be able to swing, the lower surface of the tip opening 36 of the duct 10 can be brought into close contact with the surface of the object to be ground, and the contact Grinding powder generated at the wheel and blown forward can be almost completely sucked and collected.

FIGS. 5 and 6 show other embodiments of the present invention, and the same parts as those shown in FIGS. 1 to 4 are designated by the same reference numerals and their explanations will be omitted. In the polishing machine of this embodiment, the polishing belt 7 is arranged at the center of the movable cart 51. That is, the front end 51a and the rear end 51 of the mobile cart 51 having wheels 50, 50.
b is formed into a bifurcated shape, and a rotating shaft 53 is rotatably supported on the upper surface of the front bifurcated portion 51a via a bearing body 52, and the drive pulley 4 is fixed to the center of the rotating shaft 53 to form the front bifurcated portion 51a. Notch groove in the center of (not shown)
It is kept in

The tension pulley 5 is rotatably supported approximately at the upper center of the movable carriage 51 via a tension adjustment mechanism 54. In other words, various configurations can be adopted for the tension adjustment mechanism 54, but in the embodiment shown in the drawings, the elevating bodies 57, 57 can be raised and lowered by support rods 56, 56, which are erected and fixed on the base 55 on the movable cart 51. The lower ends of the elevating bodies 57, 57 are connected and fixed by a support plate 58, and a rotating shaft 5 is rotatably mounted between the elevating bodies 57, 57.
A tension pulley 5 is pivotally supported at 9. Guide rods 60, 6 are provided vertically on the lower surface of the support plate 58.
0 is connected and fixed by a mounting plate 61, and a pantograph 62 that can extend and contract up and down is interposed between the mounting plate 61 and the base 55,
Spring 63, 63 to guide rod 60, 60
is wound and compressed between the support plate 58 and the mounting plate 61, and the elevating bodies 57, 57, which pivotally support the tension pulley 5, are always urged upward. An adjustment handle 64 is attached to one end of the pantograph 62, and by rotating this adjustment handle 64 in an arbitrary direction, the pantograph 62 is extended or contracted, and the upward biasing force of the tension pulley 5 is adjusted. .

Further, a rotary shaft 66 is rotatably supported on the lower surface of the rear end bifurcated portion 51b of the movable trolley 51 via a bearing body 65, and the contact wheel 6 is fixed to the center of the rotary shaft 66, and the rear end bifurcated portion is rotatably supported. It is held in a notched groove 67 at the center of 51b.

The endless abrasive belt 7 is connected to the drive pulley 4,
Tension pulley 5 and contact wheel 6
The contact wheel 51 is disposed in the front-rear direction in the center of the movable trolley 51, and is driven by the drive motor 3 to run forward of the movable trolley 51 on the lower surface of the contact wheel 6.

The dust collector main body 8 is installed on a mounting plate 70 which is provided as a bridge between the upper ends of support plates 68 and 69 which are arranged and fixed in parallel to the movable trolley 51 so as to be inclined forwardly. Further, the separation and collection box 9 is installed on a mounting plate 70 at a position in front of the dust collector main body 8. Further, the grinding powder collection duct 10 is connected to the contact wheel 6
The abrasive belt 7 is disposed longitudinally in the center of the movable cart 51 along the lower surface of the abrasive belt 7, which is stretched between the abrasive belt 7 and the drive pulley 4, and is supported by an L-shaped bracket 71.

A bracket 72 is attached to the upper surface of the rear end portion 51b of the movable cart 51, and an operating handle 73 is attached to the bracket 72 via a pivot 74 so that its tilting position can be adjusted by appropriate means. 75 is an operation panel attached to the operation handle 72; 76 is a guard member disposed along the upper surface of the abrasive belt 7 that is stretched over the tension pulley 5 and the contact wheel 6; and 77 is used when transporting the abrasive machine. This hook 77 is attached via a support shaft 78 to the upper end of the support plate 69 above the overall center of gravity so that it can be stored on the lower side.

Effects of the invention According to the grinding machine according to the invention, the grinding powder scattered in the forward direction of the contact wheel is sucked and collected into the grinding powder collection duct together with harmful gases such as oil smoke generated during grinding. Therefore, grinding work can be performed hygienically. In particular, the tip opening of the grinding powder recovery duct is arranged in front of the contact wheel, and the receiving tray member is pivoted to the tip opening so that the angle can be adjusted in the vertical direction toward the contact wheel. The bottom surface of the opening at the tip of the duct can be brought into close contact with the workpiece to be ground, eliminating any gaps and completely and reliably sucking up the grinding powder that is generated at the contact wheel and blown forward. . In addition, the grinding powder collection duct is arranged to extend in the front-rear direction of the movable cart, and the rear end of the duct is detoured in a U-shape and connected to the separation collection box, so that the grinding powder can be removed while passing through the duct. The spark powder is sufficiently cooled, and therefore, the ground powder particles are separated and collected without adhering to the separation and collection box, and the filter of the dust collector body is not burnt out. Furthermore, the dust collector body and the separation and collection box are narrow. Not only can it be arranged in a well-balanced manner in the space, it also allows the use of a small dust collector, and can fully meet requests for weight reduction.
The labor required by the operator when handling the polishing machine can be significantly reduced.

[Brief explanation of the drawing]

Fig. 1 is a left side view showing an embodiment of the polishing machine according to the present invention, Fig. 2 is a right side view, Fig. 3 is a rear view,
FIG. 4 is a bottom view of the tip of the grinding powder recovery duct. FIG. 5 is a left side view showing another embodiment of the present invention, and FIG. 6 is a rear view. 1...Moving trolley, 3...Drive motor, 4...Drive pulley, 5...Tension pulley, 6...Contact wheel, 7...Abrasive belt, 8...Dust collector body, 9...Separation and collection box, DESCRIPTION OF SYMBOLS 10...Grinding powder collection duct, 31...Intake pipe, 36...Tip opening, 39...Saucer member, 42...Handle.

Claims (1)

[Scope of Claim for Utility Model Registration] A wheeled movable trolley having a hand-operated handle on the rear side has a contact wheel on the rear lower surface and a drive pulley on the front upper surface, each rotatably supported horizontally,
and a tension pulley is rotatably supported horizontally at the center upper part of the movable carriage via a tension adjustment mechanism, and a drive motor connected to the drive pulley is mounted on the movable carriage close to the drive pulley; A portable polishing machine in which an endless abrasive belt is stretched between a drive pulley, a contact wheel, and a tension pulley, and the abrasive belt is driven to run toward the front of a movable cart on the lower surface of the contact wheel. A dust collector main body having a dust collection box and an intake air generating means, and a grinding powder separation and collection box connected to the dust collection box via an intake pipe are mounted on a moving trolley so that the separation and collection box is in the front. On the other hand, a grinding powder collection duct that is wider than the belt width and has a long length runs along the lower surface of the abrasive belt that is stretched between the rear contact wheel and the front drive pulley in the front-rear direction of the moving cart. and a distal end opening of the duct is disposed oppositely in front of the contact wheel, and a saucer member is pivotally attached to the distal end opening so as to be able to adjust the angle vertically toward the contact wheel. A portable polishing machine characterized in that the rear end is connected to the separation and collection box by making a detour in a U-shape.