DE102004050183B3 - Splice cutter and grinder for roadworks has guiding rod connected with driving bar, and motor fastened to lever, where operator operates lever against spring action to lower and press tool - Google Patents

Abstract

The combination has a guiding rod (FS) connected with a driving bar. A motor (M) is fastened to a lever by a suspension device. An operator standing with a foot on the bar operates the lever against spring action for lowering and pressing the tool. The engine lying laterally before the rod or the tool, in particular a drill or a grinding wheel is tracked in a positive or a negative angle in relation to normal driving direction.

Description

The invention relates to a combined joint milling and grinding device. A grooving cutter or cutter for making cuts and widening joints or cracks is the main patent DE 103 48 481 B3 described.

in the road construction are cut into a road surface or milled Joints filled with potting compound. Continue to have Cracks due to weather conditions, tensions or subsidence have been formed, be grouted with permanently elastic potting compound, around the road surface from further damage to preserve.

From the DE 91 03 718 U1 the applicant is a Fugenfräs- or -schneidgerät with a biaxial car known on which the necessary equipment, such as internal combustion engine with reduction gear to drive the cutter or the saw blade and cooling water tank and / or vacuum cleaner, are arranged and which means for adjusting the depth of cut having the cutter disk or the saw blade. Specifically, an adjusting lever is provided for cutting depth adjustment, which holds the wheel or both wheels of an axle relative to the carriage about a carriage-fixed transverse axis pivotable. Between the carriage and lever a spring is mounted, which is dimensioned so that it raises the carriage upwards and thus the cutting disc or the saw blade from the joint.

As a result, the entire car is held pivotable relative to the road surface about the one axis, by the other axis can dodge. The evasive axis is firmly connected to the lever and between lever and car acts of the spring tension, which always pulls the car up. To set the desired depth of cut of the car with the running cutting tool is pressed from its guide handle ago against the spring tension down and then held the locking lever on the car against a stop or locked; as an attack on the depth of cut can be provided on the car an adjustable rail. The car has a trailing axle and a rigid axle, wherein the two wheels of the trailing axle (steering axle) are each mounted pivotably about a vertical axis, while the two wheels of the rigid axle are not vertically pivotable. Between the two wheels of the rigid axle, a milling disc is arranged, whose axis of rotation coincides approximately with the rigid axle. To adjust the depth of cut, the rigid axle is mounted on the carriage-fixed transverse axis about two chassis-fixed pivot points on a circular arc pivotable and lockable. During the adjustment of the rigid axle, the axis of rotation of the milling disc remains approximately in the vicinity of the rigid axle and thus also allows cornering, wherein the cutting disc is trackable under visual control, for example, cracks in the road surface. Furthermore, as a parking brake pivotally held on a carriage brake lever is provided which is under spring tension and acts in the disengaged position of the cutter disk or the saw blade on the wheel or both wheels of an axle. The spring ensures braking. The parking brake only engages when the car is up. Conveniently, the parking brake in case of need against the spring tension of the wheel is released and locked. Alternatively, the lever is not locked to the car, but held by the person working on the device with one hand against a stop. For example, in case of incorrect operation then only the lever needs to be released and the device moves with its cutting tool automatically out of the joint and stops because the parking brake engages when the car is up. Although the Fugenfräs-- or -schneidgerät after the DE 91 03 718 U1 the applicant has a high degree of safety, in practice, however, a certain clumpiness has been found, especially when tracking wild cracks in the road surface.

Furthermore, from the DE 299 08 397 U1 the applicant a hand-held device for trimming pothole edges on asphalt pavements and for milling road markings known. To create a milling machine that is small, light and manoeuvrable and that allows for oblique milling, two wheels are pivotally mounted to a chassis of the device. The two wheels are attached to a lever, which is supported by a hinge on the chassis and pulled by two springs, which are attached elsewhere on the chassis, upwards. When pressed down with the guide rod, which is movably connected to the chassis, the milling drum is pressed into the asphalt. When releasing the guide lever, the milling drum is immediately lifted out of the asphalt by the springs. In order to facilitate the impressions of the milling drum in the asphalt, the guide rod with two levers is hingedly connected to the lever arms. The milling tool, to which a gear is attached, is driven by a chain which is driven by a motor of the device with a reduction gear. By replacing the wheels on the left or right side with larger wheels, oblique milling into the asphalt is possible. Although offers the hand-held device after the DE 299 08 397 U1 The applicant has a high degree of maneuverability, in practice, however, a relatively high amount of force has been found to accurately tracking wild cracks in the pavement.

Furthermore, from the DE 295 05 392 U1 of the Applicant a hand-held, mobile crack opener and joint bender known for the treatment of cracks and joints in paving. In order to allow widening of the cracks or a knocking of a joint in the often warm asphalt track with little tool wear, shaking motions are generated in the movable crackspray and Fugenstampfgerät with a mounted on an exciter transmission engine in a moving freely by springs or rubber frame. Furthermore, an obliquely rearwardly extending wedge or an obliquely rearwardly extending steel punch is provided below, which engages by raising or lowering the guide rod of the wedge or steel stamp in the crack or joint and widened or stamped this as required to a certain width or depth. Due to the short construction it is also possible to follow wild cracks.

Furthermore, from the DE 295 11 771 U1 the applicant a Fugenfräs-Fugenpflug or brushing device with three-axle car known, which has drive wheels with drive axle, a wheel with rigid axle and a pivoting steering wheel. After the wheels, a milling disc is arranged, which can be tracked during operation of the device under visual control, in particular of cracks in the road surface. The cutting depth of the milling disc is set on the device with the guide rails, whereby the fine adjustment is done with the height-adjustable running wheel. For safety reasons, the drive wheels are arranged so that when the operator releases the guide rails, the car tilts forward by the greater weight of the engine on the wheels and the steering wheel. This has the consequence that the drive wheels are lifted from the road surface and the device stops or faster by hand back and forth can be driven.

A hand-held cleaning device for in cracks or joints of pavements, especially paved pavements, growing weeds is from the DE 90 00 712 U1 the applicant known. In order to provide a weed cutter which allows a deep and reliably manoeuvrable engagement of the cleaning tool in the slots, the weed cutter has a guide bar at the lower end of which a narrow wire brush is transversely mounted and which from a motor mounted on the guide bar engages deeply into the slot is driven to clean scratches or joints. The guide rod is set in the machining direction at an acute angle to the joint and determines the engagement depth of the wire brush in the joint by lifting or lowering the guide rod. The transversely mounted narrow wire brush is selectively driven by an internal combustion engine, a pneumatic motor with reduction gear (which is supplied by a construction compressor and shut off by means of a valve) or an electric drill, which is received at its clamping neck on the guide rod. In the weed cutter above or behind the transverse wire brush a single axis with a wheel or two of them is provided. Joints in flat areas are cleared of weeds with two wheels, while in connecting joints between mutually offset planes a wheel is used, which forms a support point for the weed cutter. The second wheel is thus removable on the single axis, depending on what kind of joints with the weed cutter must be edited.

Furthermore, from the DE 39 29 120 C2 a portable electric machine tool, in particular for milling in road surfaces, with an electric motor for driving a cutting tool for machining the road surface, with a support for supporting the electric motor and with handles attached to handle attachment parts of the holder for holding the machine tool during its operation are attached, known. Specifically, a mechanical and adjustable connection of each handle to the handle mounting portion of the bracket is provided by attaching a first annular member to the handle mounting portion and a second annular member to the handle. These elements oppose each other in coaxial arrangement, each of the annular elements being provided with elongate recessed portions and elongated projecting portions alternately and sequentially disposed at a predetermined angular distance with respect to its own center. The elongated recessed and protruding portions of the first annular member are configured for engagement with the elongate protruding and recessed portions of the second member such that the handle is rotatable and occupies a desired mounting angle position with respect to the bracket.

Furthermore, from the DE 44 08 396 A1 a joint cutter with a circumferentially and motor-driven milling blade, which is mounted vertically adjustable on a chassis having a support frame, known. Specifically, a self-propulsion drive and a guide head is provided, which is intended to advance the milling blade in advance to permanently scan a gap to be milled and feed the joint cutter along the gap.

Finally, from the DE 298 20 188 U1 a movable joint cutter, in particular for the introduction of cuts in street ceilings or similar surfaces of asphalt, concrete or similar building materials, known, which has a chassis frame with front and rear wheels, at least one sawing device, the one on a Adjusting device in the working position has lowered, rotating saw blade, wherein the saw blade is driven by a drive motor. In detail, it is provided that the front wheels and the rear wheels are steerable, wherein the steering movement is transferable via a steering linkage connected to the wheels.

Next the milling machines or Floor saws are hand-held or other surface treatment equipment known on a chassis mounted grinding equipment.

As the above assessment of the prior art are differently designed Milling machines or Joint cutters or grinding machines known. As a rule, these have a certain clumsiness, especially when tracking of wild cracks in the road surface or the force required for tracking at uniform engagement depth or grinding contact pressure is relatively high. Therefore missing in the Practice a cost effective Fugenfräs- and grinder, which even at high speeds of the tool easy tracking and Control of the penetration depth and / or the contact pressure allows. This is particularly important because the road construction machinery industry is extremely advanced, development-friendly industry is looking at the very fast improvements and simplifications and put into action.

Of the Invention is opposite the known milling machines or Joint cutters or grinding machines the task is based on a combined joint milling and grinding device available which even at high speeds of the tool a simple tracking of the tool and control of the penetration depth or the contact pressure allows.

• – mindestens ein aus zwei, koaxial im Abstand zueinander angeordneten Einzelrädern ausgebildetes Vorderrad und ein lenkbares Hinterrad, welche mittels eines Fahrstegs miteinander verbunden sind,
• – eine im Bereichs des Vorderrads mit dem Fahrsteg verbundene Führungsstange mit daran beweglich gelagerten, federbelasteten Hebel und
• – einen über eine Aufhängevorrichtung an dem Hebel befestigten Motor, welcher ein im Bereich des Vorderrades angeordnetes Werkzeug antreibt,

wobei zum Absenken und Andrücken des Werkzeugs, die mit einem Fuß auf dem Fahrsteg stehende Bedienungsperson den Hebel gegen die Federkraft betätigt und wobei der seitlich vor der Führungsstange liegende Motor oder das Werkzeug, insbesondere ein Fräser oder eine Fräs-/Schleifscheibe, in Bezug zur Normalen der Fahrtrichtung in einem positiven oder negativen Winkel einstellbar sind.This object is achieved in a combined Fugenfräs- and grinding device for widening joints or cracks or for the production of cuts or for grinding surfaces, cracks, according to claim 1, which has:

• At least one front wheel formed from two coaxially spaced-apart individual wheels and a steerable rear wheel, which are connected to one another by means of a travel web,
• - A connected in the area of the front wheel with the drive bar guide rod with movably mounted, spring-loaded lever and
• A motor mounted on the lever via a suspension device, which drives a tool arranged in the region of the front wheel,

wherein for lowering and pressing of the tool, the operator standing with one foot on the walkway actuates the lever against the spring force and wherein the laterally located in front of the guide rod motor or tool, in particular a cutter or a milling / grinding wheel, with respect to the normal the direction of travel are adjustable in a positive or negative angle.

The inventive combined Fugenfräs- and grinder is similar to a scooter built.

As Experiments have shown possible the joint milling and grinding device according to the invention due the high mobility, for example, in conjunction with a small milling disc, an exact tracking of wild cracks in the road surface. On surprising simple and inexpensive Way is in the joint milling and grinding device according to the invention also at high speeds and long cracks fatigue-free control of the penetration depth, for example, the transverse milling disc, and a simple tracking allows. Furthermore, it is advantageous that overall a very good view at Machining process and by the spring load when releasing the lever ensures immediate lifting of the tool head is. The joint cutter or cutter according to the invention is especially for the cost-effective fast Repair of "wild" hairline cracks or Weed removal or concrete / asphalt brushing or milling or Cutting work can be used and it is a high cost savings due to long service life and low time and personnel costs in the Compared to a commercial one End mill, which is a high tool wear and a strenuous and has achieved slow operation.

Thereby that the side in front of the guide rod lying engine or the tool, in particular a cutter or a milling / grinding wheel, in relation to the normal of the direction of travel in a positive or Negative angles are adjustable, for example, with a handle a change from the production of a vertical joint to a V-joint or chamfering a curb or cutting edges or the grinding of a wall or a curb.

In a further development of the invention, according to claim 2, the shaft of the motor is guided in a tube and the suspension device attached to the pipe. This development of the invention has the advantage that the desired angle adjustment or adjustment under direct visual control with a few simple steps and very accurate success can.

Preferably consists, according to claim 3, the Hanger from at least two support arms, wherein the support arms directly or via a Adapters are attached to the pipe.

These Embodiment of the invention has the advantage that the Aushängevorrichtung for example, from two strapping as carrier arms produced inexpensively is and in practical use a high robustness and rigidity having.

at a preferred embodiment of the invention, according to claim 4, the lever of a hand-operated Strap and a deflector.

These Embodiment of the invention has the advantage that by the hand-operated Strap all Actuating means namely for the Leverage and for the Speed control of the engine, are arranged in spatial proximity to each other.

In Further development of the invention is, according to claim 5, a tension spring arranged on the lever.

These Development of the invention has the advantage that this the User a simple yet safe operation, since he has the entire body weight against the spring force and against the kickback force of the tool can use.

Preferably is, according to claim 6, above the tool a splinter protection arranged.

By the splinter protection, which, for example, as in a commercial Angle grinder can be designed, is a body damage the user reliable prevented.

In Further development of the invention, according to claim 7, the steerable Rear wheel means for determining the direction of travel and / or a Parking brake on.

These Development of the invention has the advantage that - for example when driving between two distant repair sites - also one longer Driving straight ahead largely without necessary corrections by the user allows becomes. Preferably, a raid strap, which can be folded up and down as a means to be used. By means of the parking brake can unintentional rolling away reliable be prevented.

Further Advantages and details can be found in the following description a preferred embodiment of the invention with reference to the drawing. In the Drawing shows:

1a in side view and partly in section

1b in plan view and

1c front view of a wheeled scissors-based grooving machine,

1d in detail a rear wheel with raid handle and parking brake

2a . 2 B in front view a mobile grinding machine on scooter basis and

3a . 3b in front view a mobile trimmer-based cutter.

In the 1a to 3b is a combined joint milling and grinding machine on scooter base shown. The joint milling and grinding device or cutter according to the invention has the advantage of easy movability on site - especially in the case of repair work - and that this can be transported in the trunk to the place of use. The Fugenfräs- and grinder or cutter is inexpensive to build and allows a compact and robust design, resulting in a longer life results, which is desirable and important under the rough conditions of road construction and can also in tile, wood floors and screed repair work (for example in parking garages) as well as for brushing weeds or metal plates.

In detail, the joint milling and grinding device has at least one front wheel V formed from two coaxially spaced-apart individual wheels E1, E2 and a steerable rear wheel H, which are connected to one another by means of a travel web F. In the area of the front wheel V, a guide rod FS, on which a spring-loaded lever HE is movably mounted, is fastened to the travel web F. On the lever HE motor M is fixed, which drives a arranged between the individual wheels E1, E2 of the front wheel V cutter or a milling disc FR. For lowering and pressing of the tool FR, in particular a milling cutter or a milling / grinding wheel, the operator standing with one foot on the moving bridge F actuates the lever HE against the spring force, preferably a tension spring FE. The lever HE may preferably from a hand-operated bracket B and egg NEM deflecting UB and there is a manually adjustable means for cutting depth adjustment FT, preferably for limiting the adjustment of the lever HE (adjustable stop), provided. For example, the milling depth can be set in the range of 0mm to 15mm and the milling width between 2mm and 6mm can be selected. Above the tool FR a splinter protection is arranged.

In the in the 1a to 3b illustrated embodiment, the shaft of the motor M is guided in a tube R and the suspension device AH is attached to the tube R. Preferably, the suspension device A consists of at least two support arms, wherein the tube R is attached directly or via an adapter to the support arms. This embodiment has the advantage that the motor M or the tool FR located laterally in front of the guide rod FS can be adjusted under visual control for the respective application in relation to the normal of the direction of travel in a positive or negative angle. The adjustment of the angle can be done, for example, by a lockable slot guide in the support arm, such as a steel band, or by means of a slide-mounted on the support arm mounted adapter. In the context of the invention, a cranked tube R (also in conjunction with corresponding Winkelverstellmitteln for the tool FR) can be used or it can be done via a fixed directly to the motor M support arm. The various adjustment options therefore allow, for example, a grinding on the edge (see 2a ) or grinding a wall W or a curb (see 2 B ) or cutting the edges (see 3a ) or chamfer the curb (see 3b ).

This in 1d illustrated steerable rear wheel H has a means for determining the direction of travel MF, for example, a folding or ambushing bracket and a parking brake BR (to prevent unintentional rolling away) on. In addition, the rear wheel H can be retrofitted with a few simple steps as a rigid axle with two wheels.

Around the grinding / milling dust to bind, is preferably still a water tank for Provision of the tool FR provided. Finally, in further training the invention at the tube R at least one handle HG1, HG2 arranged become. As a result, the joint milling and grinding device or cutter according to the invention disassembled and used, for example, hand-guided for edge areas, which would not be achievable during assembly on the scooter.

At the Operation of the joint milling and grinding device or cutter according to the invention the operator stands with one foot on the web F while this with the other foot to Control of the driving speed and the direction of travel repels. For example a V-shaped groove mill to be able to are in the normal mode of operation laterally in front of the guide rod FS lying engine M or lying in the normal to the direction of travel milling cutter or the milling disc FR adjustable in relation to this in a positive or negative angle. At the Grinding a wall can reduce the contact pressure via the steerable rear wheel H can be varied as desired. As an engine M can optionally be an internal combustion engine (For example, a commercial Brushcutter with catalyst (possibly also noise protection hood) for environmental reasons about 1.5 KW and a maximum speed of 12,000 rpm) or a Compressed air motor with reduction gear or an electric motor provided become.

All illustrated and described embodiments, and all in The description and / or the drawing disclosed new individual features and their combination with each other, are essential to the invention. For example can the guide rod FS to the landing gear F designed foldable, so that the invention Fugenfräse or cutter can also be transported in the trunk of a car; the lever HE can be locked in different positions; as a cutting tool FR leaves itself instead of a milling disc a saw blade to use; instead of a tension spring and a compression spring on the bracket B can be arranged; to avoid load peaks, resulting in damage to the Gear or lead to the tool FR, a slip clutch can be provided; for working big bumps in the surface, which over the wheel distance of the single wheels E1 and E2 go, a lateral extension can be provided; for pivoting in the edge area can on the lever HE a hinge joint be provided, etc.

Claims (11)

Combined joint milling and grinding device for widening joints or cracks or for producing cuts or for grinding surfaces, comprising: - at least one of two, coaxially spaced individual wheels (E1, E2) formed front wheel (V) and a steerable Rear wheel (H), which are connected to each other by means of a travel web (F), - one in the area of the front wheel (V) to the drive web (F) connected to the guide rod (FS) with movably mounted, spring-loaded lever (HE) and - a a suspension device (AH) on the lever (HE) fixed motor (M) which drives a in the region of the front wheel (V) arranged tool (FR), wherein for lowering and pressing of the tool (FR) the operator standing with one foot on the gangway (F) operates the lever (HE) against the spring force (FE) and the motor (M) or tool (FR) lying laterally in front of the guide rod (FS), in particular a milling cutter or a milling / grinding wheel, are adjustable in a positive or negative angle with respect to the normal of the direction of travel. Fugenfräs- and grinder according to claim 1, characterized in that the shaft of the motor (M) in a tube (R) out is and the hanger (AH) is attached to the pipe (R). Fugenfräs- and grinder according to claim 1 or 2, characterized in that the suspension device (AH) consists of at least two support arms, with the support arms directly or over an adapter to the pipe (R) are attached. Fugenfräs- and grinder according to claim 1, characterized in that the lever (HE) from a hand-operated Bracket (B) and a deflector (UB) exists. Fugenfräs- and grinder according to claim 1, characterized in that a tension spring (FE) on Lever (HE) is arranged. Fugenfräs- and grinder according to claim 1, characterized in that above the tool (FR) a splinter protection is arranged. Fugenfräs- and grinder according to claim 1, characterized in that the steerable rear wheel (H) means for determining the direction of travel (MF) and / or a parking brake (BR). Fugenfräs- and grinder according to claim 1, characterized in that a manually adjustable Milling / grinding depth adjustment means (FT), which limits the displacement of the lever (HE) provided is. Fugenfräs- and grinder according to claim 1, characterized in that the rear wheel (H) from a rigid axle and two wheels consists. Fugenfräs- and grinder according to claim 1, characterized in that a water tank for Sprinkling of the tool (FR) is provided. Fugenfräs- and grinder according to claim 2, characterized in that the tube (R) at least a handle (HG1, HG2) is arranged.