CA1271341A - Concrete floor finishing machine - Google Patents
Concrete floor finishing machineInfo
- Publication number
- CA1271341A CA1271341A CA000500950A CA500950A CA1271341A CA 1271341 A CA1271341 A CA 1271341A CA 000500950 A CA000500950 A CA 000500950A CA 500950 A CA500950 A CA 500950A CA 1271341 A CA1271341 A CA 1271341A
- Authority
- CA
- Canada
- Prior art keywords
- finishing
- finishing apparatus
- concrete floor
- trowel
- members
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F21/00—Implements for finishing work on buildings
- E04F21/20—Implements for finishing work on buildings for laying flooring
- E04F21/24—Implements for finishing work on buildings for laying flooring of masses made in situ, e.g. smoothing tools
- E04F21/245—Rotary power trowels, i.e. helicopter trowels
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F21/00—Implements for finishing work on buildings
- E04F21/20—Implements for finishing work on buildings for laying flooring
- E04F21/24—Implements for finishing work on buildings for laying flooring of masses made in situ, e.g. smoothing tools
- E04F21/245—Rotary power trowels, i.e. helicopter trowels
- E04F21/248—Rotary power trowels, i.e. helicopter trowels used by an operator walking behind the trowel, i.e. walk-behind power trowels
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
Abstract This concrete floor finishing machine comprises a plurality of finishing apparatus arranged outwardly of propelling means of a chassis by means of a coupling mechanism, and at least one of the finishing apparatus is caused to revolve in a direction opposite to a direction in which the other finishing apparatus revolves. Each of the finishing apparatus includes a plurality of trowel-like members, and these trowel-like members are arranged radially with the chassis at the center. The coupling mechanism is vertically extendible and contractible.
Description
~ ~71 3~i The presenk inven-tion relates to a concrete floor ~lnishing machine for smoothing out concrete floor surfaces a~ter concrete is deposited and compacted and water oozed to the surEaces is removed in a construction work known as concrete floor direct finish which is for placing carpets, elongate flooring materials or the llke as an indoor floor finlshing material on a concrete floor slab without mortar coating.
More particularly, the invention relates to a concrete floor finishing machine comprising finishing apparatus for smoothing out concrete floor surfaces in hal~-set state~ which is coupled through a coupling mechanism to lie outwardly of propelling apparatus, and a drive mechanism for rotating the finishing apparatus round the propelling apparatus.
The above-noted concret2 floor direct finishing work conventionally is carried out by a method in which a plasterer gives finishing touches to the concrete floor surfaces with a trowel while observing the hardening state thereof, and by a method in which .~. ~,..
;3 L~ l an operation up to interim finish is effected using a finishing machine (srandname: Trowell) which is moved by a worker holding a handle extending from a main body, with several Einishing trowel-like members driven by an engine mounted on the main body placed in contact with the concrete floor surfaces, and thereafter a plasterer gives finishing touches with a trowel.
However, the above methods invariably require skills of the plasterer and may make his working conditions too severe particularly in wintertime when the work tends to be time-consuming because of the slowness of concrete hardening.
In the case of the lat-ter method, the finishing machine is steered by controlling the handle to incline the main body while maintaining the finishing trowel-like members in contact with the floor thus utilizing reaction forces resulting from the contact of the finishing trowel-like members with the floor.
Therefore, the steering control is difficult and the concrete surfaces are likely to be marred at steering times. Moreover, vibrations of the engine are conducted to the worker, who may be exhausted after working for hours.
It has recently been proposed to carry out concrete floor direct finishing work by using a finishing apparatus mounted on a self-propelled vehicle as noted below. According to the proposal, a pair of right and leEt crawler propelling apparatus, for example, is provided at an approximately central por-tlon of the vehicle body, and one finishing apparatus comprising a plurality of finishing trowel-like member, for example, is provided to be rotatable clrcumferentially of the propelling apparatus.
Although the concrete floor finlshing machine disclosed in the above prior application is capable of effecting concrete floor finishing with considerably high preclsion and of alleviating the fatigue of the worker, the machine may entail the following inconveniences and therefore has room for improvement.
Since the finishing apparatus rotates round the propelling apparatus in one direction and receives a reaction force from the concrete floor surface, the propelling apparatus during an operational run is sub~ected to a moment acting rightward or leftward with respect to its running direction. This tends to make it difficult to control the machine to advance straight.
On the other hand, where the propelling apparatus comprises a pair of right and left crawler propelling apparatus, lt is conceivable to differentiate drive speeds of the right and left crawler propelling apparatus beforehand in order to counterbalance the moment acting rightward or leftward with respect to the running direction as des~ribed above. In this case, however, one of the crawler propelling apparatus tends to leave a trace behind and deteriorate finishing precision.
In view of the above state of the art~ the present invention improves the concrete floor finishing machine to be capable of effecting concrete floor direct finish with higher precision and to have good stability when running.
~ concrete floor finishing machine according to the present invention is characterized by comprising a plurality of finishing A ~ ~ 7 1 ~
apparatus provlded outwardly of a propelllng apparatus for smoot.hlng out concrete floor surfaces in half-set or half-hardened state, and the plurality of flnishlng apparatus are operatively connected to a drive mechanism such that at least one of the flnishlng apparatus is rotatable about the propelling apparatus ln a direction opposite to a directlon of rotation of the other finishing apparatus.
10 In one preferred embodiment of the present invention two finishing apparatus are provided outwardly of the propelling apparatus for smoothing out the concrete floor surfaces in half-set state, and the two finishing apparatus are operatively connected to one motor such that one of the finishing apparatus is rotatable about the propelling apparatus in a direction opposi-te to a direction of rotation of the other finishing apparatus.
Since one of the plural finishing apparatus rotates about the propelling apparatus in a direction opposi-te to a direction of rota-tion of the other finishing apparatus, the reaction forces these finishing apparatus receive from the concrete floor surfaces at times of concrete floor direct finishing work are offset, whereby the propelling apparatus is free from a moment acting rightward or leftward with respect to the running direction.
Therefore, the running stability is little affected during an operational run, and this facilitates running controls of the machine.
Consequently, a concrete floor finishing machine is provided which is capable of finishing concrete floor surfaces ~ith high precision, easy to control and excellent in both operability and controllability.
In addition, since these two finishing apparatus are driven by a single motor in the preferred embodiment noted above, the number of motor is minimum compared with the case of driving the finishing apparatus with separate motors and this arrangement has an advantage from the point of view of mounting ~;~ 71.3L~'1 :
space. Moreover, the entire weight can be reduced and a rotationa:L frequency ratio between the finishing apparatus may be maintained constant at all times even if a diEference occurs between the reaction forces acting on the finishing apparatus.
The accompanying draw~ngs illustrate ernbodiments of the present invention, in which:
Fig. 1 is a partly broken away side elevation of a concrete floor finishing machine according to one embodiment, ~ig. 2 is a partial plan view of the concrete floor flnlshing machine, Fig. 3 is a partly broken away rear view of the concrete floor finishing machine, ~ig. 4 is an enlarged sectional view of a principal portion, Fig. 5 is a view taken on line V-V in Fig. 1, Fig. 6 is a partly broken away side elevation of a concrete floor finishing machine according to another embodiment, and Fig. 7 is an enlarged sectional view of a principal portion thereof.
~mbodiments of the present inventio~ will be described hereinaftsr with references to the drawings.
As shown in Figs. 1 and 2, a concrete floor finishing machine for use in concrete floor direct finishing work comprises finishillg apparatus X for 1.;~ 4~L
smoothing out concrete floor surfaces, connected to a chassis 1 having a pair of ri~ht and left crawler propelling apparatus A.
Each of the two crawler propelling apparatus A
comprises a drive wheel 2 and a guiding free wheel 3 attached to opposite ends of the chassis 1, and an endless belt-like member 4 extending between the two wheels 2, 3 and including a floor engaging surface formed of flat rubber. The right and left drive wheels 2 are operatively connected to respective reversible propelling motors 5, and are adapted to propel the machine backward and forward and to turn the machine round by a combination of backward and forward rotations of the two motors 5. A sledge-like member 6 extends downwardly from the chassis 1 at a fore and aft intermediate position between the two .wheels 2, 3 and presses against an inner peripheral sur~ace of the belt-like member 4 to contact the floor, causing the crawler propelling apparatus A to engage a wide area of the floor in order to prevent the machine from sinking into a concrete surface that has not hardened yet. Number 4a in the drawings denotes scrapers for scraping off concrete that has adhered to an outer peripheral surface of the belt-like member 4.
The finishing apparatus X comprises an innerfinishing apparatus Xa and an outer finishing 1~7~34~
apparatus Xb arranged on concentric circles around the chassis 1 as shown in Eigs. 1 and 2. ~he two finishing apparatus Xa, Xb include four trowel-like members 7a, 7b, respectively. In plan view, the trowel-like members 7a and trowel-like members 7b, respectively, are attached to extreme ends of four steel pipe frames 8a, 8b extending radially from a center of the chassis 1 with a 90 phase difference between each other. The outer finishing apparatus Xb is provided with a circular pipe frame 19 having a radius approximately equal to a radius of gyration of outermost portions of the trowel-like members 7b, bolted through support rods 20 to the extreme ends of the pipe frames 8b carrying the trowel-like members 1.5 7b, so that the trowel-like members 7b and other constituent members are prevented from colliding with other objects when moving and finishing the concrete floor.
As shown in Fig. 5, each of the trowel-like
More particularly, the invention relates to a concrete floor finishing machine comprising finishing apparatus for smoothing out concrete floor surfaces in hal~-set state~ which is coupled through a coupling mechanism to lie outwardly of propelling apparatus, and a drive mechanism for rotating the finishing apparatus round the propelling apparatus.
The above-noted concret2 floor direct finishing work conventionally is carried out by a method in which a plasterer gives finishing touches to the concrete floor surfaces with a trowel while observing the hardening state thereof, and by a method in which .~. ~,..
;3 L~ l an operation up to interim finish is effected using a finishing machine (srandname: Trowell) which is moved by a worker holding a handle extending from a main body, with several Einishing trowel-like members driven by an engine mounted on the main body placed in contact with the concrete floor surfaces, and thereafter a plasterer gives finishing touches with a trowel.
However, the above methods invariably require skills of the plasterer and may make his working conditions too severe particularly in wintertime when the work tends to be time-consuming because of the slowness of concrete hardening.
In the case of the lat-ter method, the finishing machine is steered by controlling the handle to incline the main body while maintaining the finishing trowel-like members in contact with the floor thus utilizing reaction forces resulting from the contact of the finishing trowel-like members with the floor.
Therefore, the steering control is difficult and the concrete surfaces are likely to be marred at steering times. Moreover, vibrations of the engine are conducted to the worker, who may be exhausted after working for hours.
It has recently been proposed to carry out concrete floor direct finishing work by using a finishing apparatus mounted on a self-propelled vehicle as noted below. According to the proposal, a pair of right and leEt crawler propelling apparatus, for example, is provided at an approximately central por-tlon of the vehicle body, and one finishing apparatus comprising a plurality of finishing trowel-like member, for example, is provided to be rotatable clrcumferentially of the propelling apparatus.
Although the concrete floor finlshing machine disclosed in the above prior application is capable of effecting concrete floor finishing with considerably high preclsion and of alleviating the fatigue of the worker, the machine may entail the following inconveniences and therefore has room for improvement.
Since the finishing apparatus rotates round the propelling apparatus in one direction and receives a reaction force from the concrete floor surface, the propelling apparatus during an operational run is sub~ected to a moment acting rightward or leftward with respect to its running direction. This tends to make it difficult to control the machine to advance straight.
On the other hand, where the propelling apparatus comprises a pair of right and left crawler propelling apparatus, lt is conceivable to differentiate drive speeds of the right and left crawler propelling apparatus beforehand in order to counterbalance the moment acting rightward or leftward with respect to the running direction as des~ribed above. In this case, however, one of the crawler propelling apparatus tends to leave a trace behind and deteriorate finishing precision.
In view of the above state of the art~ the present invention improves the concrete floor finishing machine to be capable of effecting concrete floor direct finish with higher precision and to have good stability when running.
~ concrete floor finishing machine according to the present invention is characterized by comprising a plurality of finishing A ~ ~ 7 1 ~
apparatus provlded outwardly of a propelllng apparatus for smoot.hlng out concrete floor surfaces in half-set or half-hardened state, and the plurality of flnishlng apparatus are operatively connected to a drive mechanism such that at least one of the flnishlng apparatus is rotatable about the propelling apparatus ln a direction opposite to a directlon of rotation of the other finishing apparatus.
10 In one preferred embodiment of the present invention two finishing apparatus are provided outwardly of the propelling apparatus for smoothing out the concrete floor surfaces in half-set state, and the two finishing apparatus are operatively connected to one motor such that one of the finishing apparatus is rotatable about the propelling apparatus in a direction opposi-te to a direction of rotation of the other finishing apparatus.
Since one of the plural finishing apparatus rotates about the propelling apparatus in a direction opposi-te to a direction of rota-tion of the other finishing apparatus, the reaction forces these finishing apparatus receive from the concrete floor surfaces at times of concrete floor direct finishing work are offset, whereby the propelling apparatus is free from a moment acting rightward or leftward with respect to the running direction.
Therefore, the running stability is little affected during an operational run, and this facilitates running controls of the machine.
Consequently, a concrete floor finishing machine is provided which is capable of finishing concrete floor surfaces ~ith high precision, easy to control and excellent in both operability and controllability.
In addition, since these two finishing apparatus are driven by a single motor in the preferred embodiment noted above, the number of motor is minimum compared with the case of driving the finishing apparatus with separate motors and this arrangement has an advantage from the point of view of mounting ~;~ 71.3L~'1 :
space. Moreover, the entire weight can be reduced and a rotationa:L frequency ratio between the finishing apparatus may be maintained constant at all times even if a diEference occurs between the reaction forces acting on the finishing apparatus.
The accompanying draw~ngs illustrate ernbodiments of the present invention, in which:
Fig. 1 is a partly broken away side elevation of a concrete floor finishing machine according to one embodiment, ~ig. 2 is a partial plan view of the concrete floor flnlshing machine, Fig. 3 is a partly broken away rear view of the concrete floor finishing machine, ~ig. 4 is an enlarged sectional view of a principal portion, Fig. 5 is a view taken on line V-V in Fig. 1, Fig. 6 is a partly broken away side elevation of a concrete floor finishing machine according to another embodiment, and Fig. 7 is an enlarged sectional view of a principal portion thereof.
~mbodiments of the present inventio~ will be described hereinaftsr with references to the drawings.
As shown in Figs. 1 and 2, a concrete floor finishing machine for use in concrete floor direct finishing work comprises finishillg apparatus X for 1.;~ 4~L
smoothing out concrete floor surfaces, connected to a chassis 1 having a pair of ri~ht and left crawler propelling apparatus A.
Each of the two crawler propelling apparatus A
comprises a drive wheel 2 and a guiding free wheel 3 attached to opposite ends of the chassis 1, and an endless belt-like member 4 extending between the two wheels 2, 3 and including a floor engaging surface formed of flat rubber. The right and left drive wheels 2 are operatively connected to respective reversible propelling motors 5, and are adapted to propel the machine backward and forward and to turn the machine round by a combination of backward and forward rotations of the two motors 5. A sledge-like member 6 extends downwardly from the chassis 1 at a fore and aft intermediate position between the two .wheels 2, 3 and presses against an inner peripheral sur~ace of the belt-like member 4 to contact the floor, causing the crawler propelling apparatus A to engage a wide area of the floor in order to prevent the machine from sinking into a concrete surface that has not hardened yet. Number 4a in the drawings denotes scrapers for scraping off concrete that has adhered to an outer peripheral surface of the belt-like member 4.
The finishing apparatus X comprises an innerfinishing apparatus Xa and an outer finishing 1~7~34~
apparatus Xb arranged on concentric circles around the chassis 1 as shown in Eigs. 1 and 2. ~he two finishing apparatus Xa, Xb include four trowel-like members 7a, 7b, respectively. In plan view, the trowel-like members 7a and trowel-like members 7b, respectively, are attached to extreme ends of four steel pipe frames 8a, 8b extending radially from a center of the chassis 1 with a 90 phase difference between each other. The outer finishing apparatus Xb is provided with a circular pipe frame 19 having a radius approximately equal to a radius of gyration of outermost portions of the trowel-like members 7b, bolted through support rods 20 to the extreme ends of the pipe frames 8b carrying the trowel-like members 1.5 7b, so that the trowel-like members 7b and other constituent members are prevented from colliding with other objects when moving and finishing the concrete floor.
As shown in Fig. 5, each of the trowel-like
2~ members 7a, 7b is attached, through brackets 9a, 9b secured to an upper surface thereof, to be oscillatable about a horizontal axis P1. Each trowel-like member 7a or 7b is set at a selected angle to the concrete floor surface by turning a bolt 11 screwed into a nut 10 welded to the pipe frame 8a or 8b and causing a stepped portion 11A at a forward end of the bolt 11 to abut against the brackets 9a, 9b and 1~'7~3f~L
oscillate them abou-t the axis P1~ Graduations 21 indicated by a pointer 9A extending from the brackets 9a, 9b enable visual confirmation as to a deyree of inclination of each trowel-like member 7a or 7b.
As shown in Fig. 4, each of the pipe frames 8a constituting the inner finishinc~ apparatus Xa has a root end thereof secured to a periphery of an annular coupler 12a above the chassis 1. ~his coupler 12a is attached, for relative ro-tation about an axis P2, to a ball-surfaced mountiny seat 14a vertically slidably fitted on an upstanding finishing apparatus side tubular member 13. A pair of bar members 15a are provided to be opposed to each other across one pipe frame 8a, and a bracket 16a to which the pair of bar lS members 15a are fixed is fitted on the finishing apparatus side tubular member 13 to be relatively rotatable likewise. Furthermore, this bracket 16a is operatively connected through a reduction mechanism 18a to a motor 17a attached to a lower portion of the finishing apparatus side tubular member 13, and rotations of the motor 17a cause each of the trowel-like members 7a of the inner finishing apparatus Xa to revolve round the chassis 1 to smooth out the concrete floor surfaces in half-set state.
Each of the pipe frames 8b constituting the outer finishing apparatus Xb has a root end thereof secured to a periphery of an annular coupler 12b further .
~27~34~
upward from the annular coupler 12a Eor tlle inner finishing apparatus Xa. This coupler 12b also is attached, for relative rotation about the axis P2, to a ball-surfaced mounting seat 14b vertically slidably fitted on an upstanding finishing apparatus side tubular member 13. A pair of bar members 15b are provided to be opposed to each other across one pipe frame 8b constituting the outer finishing apparatus Xb, and a bracket 16b to which the pair of bar members 15b are fixed is fitted on the finishing apparatus side tubular member 13 to be ~elatively rotatable.
Furthermore, this bracket 16b is operatively connected through a reduction mechanism 1~b to a motor 17b attached to an upper portion of the finishing apparatus side tubular member 13, and rotations of the motor 17b cause each of the trowel-like members 7b of the outer finishing apparatus Xb to revolve round the chassis 1 in a direction opposite to a direction in which each trowel-like member 7a of the inner 2~ finishing apparatus Xa revolves to smooth out the concrete floor surfaces in half-set state in cooperation with the inner finishing apparatus Xa. In this example the two motors 17a, 17b constitute a first drive mechanism 17.
When the finishing apparatus Xa, Xb smooth out the concrete floor surfaces in half-set state while rotating about the propelling apparatus A, the ~7~
finishing apparatus Xa, Xb receive reaction forces from the concrete floor surfaces~ By arranying that these finishing apparatus Xa, Xb rotate in opposite directions, the reaction forces which the finishing S apparatus Xa, Xb receive from the concrete floor surfaces are offset and the propelling apparatus A is free from a moment acting rightward or leftward with respect to its running direction, whereby the machine can run in a stable manner.
The trowel-li]ce members 7a, 7b constituting the described pair of finishing apparatus Xa, Xb may be ~djusted such that the inner trowel-like members and the outer trowel-like members have different inclination angles with respect to the concrete floor 1~ surfaces, or the two finishing apparatus Xa, Xb may be rotated at different speeds. This permits the inner finishlng apparatus Xa to be used for interim finish and the outer finishing apparatus Xb to be used for final finish, for example, to enable hiyh precision finishing work.
~ coupling mechanism 23 coupling the finishing apparatus X to the chassis 1 is vertically extendible and contractible by a second drive mechanism 25. The coupling mechanism 23 comprises a chassis side tubular member 22 fixed to and extending upward from a substantially central portion of the chassis 1, on which the finishing apparatus side tubular member 13 is fitted through a li.near hearing 23a permittirly relative slidiny between the two tubular members 13, 22. A second drive mechanism 25 comprises a motor 25a having a head portion 25A fixed to the chassis I and an end of a rack portion 25B fixed through a bracket 24 to the finishing apparatus side tubular member 13, the motor 25a being operable to cause relative sliding between the two tubular members 13, 22 thereby to cause relative vertical movement between the chassis 1 and the finishing apparatus X.
This concrete floor finishing machine is capable of making a turn b~ utilizing the described coupliny structure for the two tubular members 13, 22 and the motor 25a. More particularly, for turning the machine the trowel-like members 7a or 7b of either finishing apparatus Xa and Xb are placed in engagement with the concrete floor surfaces first so that the machine is stably supported by the trowel-like members 7a or 7b at four positions, and then the motor 25a is operated to raise the chassis 1 relative to the inishiny apparatus X. When either finishing apparatus rotating motor 17a or 17b is operated in this state, conversely the chassis 1 will turn about the axis P2. When the chassis l faces a predetermined direction, the finishing apparatus rot~ting motor 17a or 17b is stopped and the motor 25a is operated to lower the chassis 1 to the concrete floor surface, which ~ 2'~713~
completes a turn of the machine.
Thus, compared witl the case of turning the machine simply by means of a difference in moving speed between the right and left crawler propelling apparatus A, this machine is turned causing almost no damage to the concrete floor surface, with a small radius of swivelling, and accurately to a predetermined position.
On the other hand, springs 28, 29 fitted on the finishing apparatus side tubular member 13 are interposed between a first flange 26 provided inkegral with the tubular member 13 and a lower end of the ball-surfaced mounting seat 14a for the inner finishing apparatus Xa and between a second flange 27 loosely:fitted on the tubular member 13 and an upper end of the ball-surfaced mounting seat 14a, respectively. A nut 30 is screwed onto the tubular member 13 at a position above the second ~lange 27.
The ball-surfaced mounting seat 14a is vertically moved together with the second flange 27 by turning the nut 30 while confirming a pressure given by three pressing force adjusting load cells 31 interposed between the second flange 27 and the nut 30. Thus a pressing force applied to the concrete floor surfaces by the trowel-like members 7a of the inner finishing apparatus Xa is adjustable to a predetermined pressure.
7~34~
Springs 34, 35 fit-ted on the finishirlg apparatus side tubul~r member 13 are interposed between a third flange 32 provided integral with the tubular member 13 and a lower end of the ball-surfaced mounting seat 14b S for the outer finishing apparatus Xb and between a fourth flange 33 loosely fitted on the tubular member 13 and an upper end of the ball-surfaced mounting seat 14b, respectively. A nut 36 is screwed onto the tubular member 13 at a position above the fourth flange 33. The ball-surfaced mounting seat 14b is vertical~y moved together with the fourth flange 33 by turning the nut 36 while confirming a pressure given by three pressing force adjusting load cells 37 interposed between the fourth flange 33 and the nut 36. Thus a pressing force applied to the concrete floor surfaces by the trowel-like members 7b of the outer finishiny apparatus Xb also is adjustable to a predetermined pressure.
Therefore, in -the case of differentiating the inclination angles with respect to the concrete floor surfaces between trowel-like members 7a of the inner finishing apparatus Xa and the trowel-like members 7b of the outer finishing apparatus Xb or differentiating the rotating speeds between the two finishing apparatus Xa, Xb as described hereinbeforer for e~ample, in order to carrying the interim finish and final finish simultaneousl~, the reaction forces the -` ~;27134~.
two finishing apparatus Xa, Xb receive from l:h~
concrete floor surfaces may be sufficiently offset by suitably adjusting the pressing forces of the two finishing apparatus Xa, Xb respecti~ely.
The adjustment of the pressing forces applied to the concrete floor surfaces by the trowel-li]ce members 7a, 7b may be carried out by using the described motor 25a to vary positions of the pair of finishing apparatus Xa, Xb relative to the chassis 1 while confirming the pressure given by the pressing force adjusting load cells 31, 37, instead of the described mode relying on turning of the nuts 30, 36. Number 3~
in the drawings denotes a load cell for detecting a rotational torque.
Cabtyre cords 53 for transmitting control signals to the described pair of propelling motors 5, finislling apparatus rotating motors l7a, 17b and motor 25a are contained in a batch in the two tubular members 13, 22 and are connected to a control unit ~0 in a relay box 39 mounted on top of the finishing apparatus side tubular member 13. As shown in Fig. 1, this control unit 40 is connected to an operating unit 44 through a connector 41 on top of the relay box 39 and a relay cord 43 coiled on a rod 42 extending to the connector 41 to enable a worker to handle the operating unit 44 and remote-control the operations of this concrete floor finishing machine.
L.3~
Another embodiment will be described next with reference to Figs. 6 and 7. In this e~ample the ~rive mechanism 17 comprises a single motor 17a.
As shown in Figs. 6 and 7, each of the pipe Erames 8a constituting the inner finishing apparatus Xa driven by the single motor 17a has a root end thereof secured to a periphery of an annular coupler 12a above the chassis 1. This coupler 12a is attached, for relative rotation about an axis P2, to a ball-surfaced mounting seat 14a vertically slidably fitted on a tubular sleeve 60 rotatably and slidably fitted on an upstanding finishing apparatus side tubular member 13 through a pair of upper and lower bearings 59.
Furthermore, this sleeve 60 has a bevel gear 51a fixed to a lower end thereof which is operatively connected through a free rotation bevel gear 51b attached to the finishing apparatus side tubular member 13, to a bevel gear 51c fixed to the hracket 16a. Thus, rotations of the single motor 17a cause each of the trowel-like members 7b of the outer finishing apparatus Xb to revolve round the chassis 1 in a direction opposite to a direction in which each trowel-like member 7a of the inner finishing apparatus Xa revolves to smooth out the concrete floor surfaces in half-set state in cooperation with the inner finishing apparatus Xa.
By arranging that the two finishing apparatus Xa, Xb are driven by the single motor 17a as described ~L~7 ~1 3~1 above, the entire weight is reduced and a rotat:iGnal .Ereyuency ratio between the two f:inishing apparatus Xa, Xb is maintained constant at all times even if a difference occurs in the reaction forces acting on the S two finishing apparatus Xa, Xb.
On the other hand, as particularly shown in Fig.
7, springs 28', 29' fitted on the sleeve 60 and tubular member 13 and are interposed between the bevel gear 51a attached to the sleeve 10 and a lower end of the ball-surfaced mounting seat 14a for the inner finishing apparatus Xa and between a flange 27' loosely fitted on the tubular member 13 at an upper position of the tubular member 13 and an upper end of the ball-surfaced mounting seat 14a, respectively. A
nut 30' is screwed onto the tubular member 13 at a position above the flange 27'. The two mounting seats 14a, 14b are vertically moved together with the flange 27' by turning the nut 30' while confirming a pressure given by three pressing force adjusting load cells 37 interposed between the flange 27' and the nut 30'.
Thus a pressing force applied to the concrete floor surfaces by the trowel-like members 7a, 7b o~ the inner and outer finishing apparatus Xa is adjustable to a predetermined pressure.
It will be clear that the following varied modifications may be made to the above two embodiments.
t7~34~
First, the pair of ri.ght ~nd le~t craw:l.er propelling apparatus A may be replaced by a plurality of righthand side drive rollers and a plurality of lefthand side drive rollers. These are called propelling apparatus A.
The structure for permitting a ver-tical rela-tive movement between the chassis 1 to which the propelling apparatus A are attached and the finishing apparatus X
may be varied as appropriate. .For example, the linear bearing 23a in the preceding embodiment may be replaced by a combination of rack and pinion gear for use in connecting the chassis 1 and the finishing apparatus B, with a reversible motor operatively connected to the pinion gear~ Also in the preceding embodiment a double acting hydraulic cylinder may be employed in place of the motor 25a, and these are called the drive mechanism 25. Furthermore, the preceding embodiment has been described as having the chassis 1 and the ~inishing apparatus X vertically movable relative to each other by action of the drive mechanism to permit the machine to turn round with a small turning radius and causing little damage to the concrete surfaces. The finishing apparatus side tubular member 13 relatively rotatably carrying the finishing apparatus X may be fixable to the chassis 1 simply by a bolt. This bolt, the above described combination of rack and pinion gear, and the linear . ~ ~
713~il.
bearing 23a ln the preceding embodiment are collectively called the coupling mechanism 23.
The shape, mounting structure and number of the trowel-like rnembers 7a, 7b constituting the inner finishlng apparatus Xa and outer finishing apparatus Xb may be varied as appropriate. For example, the trowel-like members 7a, 7b may revolve round the chassis 1 while themselves rotating about axes by which they are attached to the pipe frames 8a, 8b.
For rotating the finishing apparatus X about the chassis 1, the mode as employed with the preceding embodiment including the inner finishing apparatus rotating motor 17a and outer finishing apparatus rotating motor 17b may be replaced by an arrangement in which rotors are mounted in the annular couplers 12a, 12b carrying the pipe frames 8a, 8b and stators are mounted in the ball-surfaced mounting seats 14a, 14b such that this coupling structure per se constitutes electromotors.
The arrangernent for adjusting the pressing force of the two finishing apparatus Xa, Xb may also take various forms. For example, a concrete hardness detector comprising a load cell and a steel bar or the like attached to an extreme end of the load cell, so that the load cell detects a load requir~d for causing a certain length of the steel bar to project into the concrete floor in half-set state, the detected load 127~ 3~
providing a basis for deriving a proper pressing force which is to be indicated~ Or the proper pressing force value obtained by this concrete hardness detector and the pressure values given by the pressing force adjusting load cells 31, 37 may be input to a control circuit of the linear head motor 25a, whereby this motor 25 automatically adjusts the pressing force. Instead of the load cells 31, 37 varied types of pressure sensors may be used for the purpose of confirming the pressing force The foregoing embodiments have ~een described as having one inner finishing apparatus Xa and one outer finishing apparatus Xb, the two finishing apparatus Xa, Xb being rotated in opposite directions, but in practising the present invention three or more finishing apparatus X may be provided. More particularly, three finishing apparatus X may be provided, for example, one o~ which is rotated in a direction opposite to the direction of rotation of the other two, or four finishing apparatus X may be provided and two of them are rotated in a direction opposide to the direction of rotation of the other two. In such a case the reaction forces the finishing apparatus X receive from the concrete floor surface may be offset to free the propelling apparatus A of a moment, by appropriately diEferentiating the numbers of trowel-like members constituting the respective Einishing apparatus X or, as described hereinbefore, appropriately differentiating the pressing forces of the respective finishing apparatus XO In short, it serves the purpose to cause at least one of the S plurality of finishing apparatus X to rotate about the propelling apparatus A in a direction opposite to a direction of rotation of the other finishing apparatus X.
Furthermore, the method of machine control may be varied as appropriate. For example, a radio receiver may be provided in place of the relay box 39 in the foregoing embodiments so that signals are sent from a radio transmitter handled by a worker to the radio receiver for controlling the machine. Alternatively, completely automatic controls may be provided by equipping the concrete floor finishing machine with a position detecting sensor to recognize a position where the machine actually stands, whereby the operation is carried out as running courses are determined based on information from this sensor and from the hardness detector.
Industrial Applicability As described hereinbefore, the concrete floor finishing machine embodying the present invention is well suited for efficiently smoothing out concrete floor surfaces in half-set state.
oscillate them abou-t the axis P1~ Graduations 21 indicated by a pointer 9A extending from the brackets 9a, 9b enable visual confirmation as to a deyree of inclination of each trowel-like member 7a or 7b.
As shown in Fig. 4, each of the pipe frames 8a constituting the inner finishinc~ apparatus Xa has a root end thereof secured to a periphery of an annular coupler 12a above the chassis 1. ~his coupler 12a is attached, for relative ro-tation about an axis P2, to a ball-surfaced mountiny seat 14a vertically slidably fitted on an upstanding finishing apparatus side tubular member 13. A pair of bar members 15a are provided to be opposed to each other across one pipe frame 8a, and a bracket 16a to which the pair of bar lS members 15a are fixed is fitted on the finishing apparatus side tubular member 13 to be relatively rotatable likewise. Furthermore, this bracket 16a is operatively connected through a reduction mechanism 18a to a motor 17a attached to a lower portion of the finishing apparatus side tubular member 13, and rotations of the motor 17a cause each of the trowel-like members 7a of the inner finishing apparatus Xa to revolve round the chassis 1 to smooth out the concrete floor surfaces in half-set state.
Each of the pipe frames 8b constituting the outer finishing apparatus Xb has a root end thereof secured to a periphery of an annular coupler 12b further .
~27~34~
upward from the annular coupler 12a Eor tlle inner finishing apparatus Xa. This coupler 12b also is attached, for relative rotation about the axis P2, to a ball-surfaced mounting seat 14b vertically slidably fitted on an upstanding finishing apparatus side tubular member 13. A pair of bar members 15b are provided to be opposed to each other across one pipe frame 8b constituting the outer finishing apparatus Xb, and a bracket 16b to which the pair of bar members 15b are fixed is fitted on the finishing apparatus side tubular member 13 to be ~elatively rotatable.
Furthermore, this bracket 16b is operatively connected through a reduction mechanism 1~b to a motor 17b attached to an upper portion of the finishing apparatus side tubular member 13, and rotations of the motor 17b cause each of the trowel-like members 7b of the outer finishing apparatus Xb to revolve round the chassis 1 in a direction opposite to a direction in which each trowel-like member 7a of the inner 2~ finishing apparatus Xa revolves to smooth out the concrete floor surfaces in half-set state in cooperation with the inner finishing apparatus Xa. In this example the two motors 17a, 17b constitute a first drive mechanism 17.
When the finishing apparatus Xa, Xb smooth out the concrete floor surfaces in half-set state while rotating about the propelling apparatus A, the ~7~
finishing apparatus Xa, Xb receive reaction forces from the concrete floor surfaces~ By arranying that these finishing apparatus Xa, Xb rotate in opposite directions, the reaction forces which the finishing S apparatus Xa, Xb receive from the concrete floor surfaces are offset and the propelling apparatus A is free from a moment acting rightward or leftward with respect to its running direction, whereby the machine can run in a stable manner.
The trowel-li]ce members 7a, 7b constituting the described pair of finishing apparatus Xa, Xb may be ~djusted such that the inner trowel-like members and the outer trowel-like members have different inclination angles with respect to the concrete floor 1~ surfaces, or the two finishing apparatus Xa, Xb may be rotated at different speeds. This permits the inner finishlng apparatus Xa to be used for interim finish and the outer finishing apparatus Xb to be used for final finish, for example, to enable hiyh precision finishing work.
~ coupling mechanism 23 coupling the finishing apparatus X to the chassis 1 is vertically extendible and contractible by a second drive mechanism 25. The coupling mechanism 23 comprises a chassis side tubular member 22 fixed to and extending upward from a substantially central portion of the chassis 1, on which the finishing apparatus side tubular member 13 is fitted through a li.near hearing 23a permittirly relative slidiny between the two tubular members 13, 22. A second drive mechanism 25 comprises a motor 25a having a head portion 25A fixed to the chassis I and an end of a rack portion 25B fixed through a bracket 24 to the finishing apparatus side tubular member 13, the motor 25a being operable to cause relative sliding between the two tubular members 13, 22 thereby to cause relative vertical movement between the chassis 1 and the finishing apparatus X.
This concrete floor finishing machine is capable of making a turn b~ utilizing the described coupliny structure for the two tubular members 13, 22 and the motor 25a. More particularly, for turning the machine the trowel-like members 7a or 7b of either finishing apparatus Xa and Xb are placed in engagement with the concrete floor surfaces first so that the machine is stably supported by the trowel-like members 7a or 7b at four positions, and then the motor 25a is operated to raise the chassis 1 relative to the inishiny apparatus X. When either finishing apparatus rotating motor 17a or 17b is operated in this state, conversely the chassis 1 will turn about the axis P2. When the chassis l faces a predetermined direction, the finishing apparatus rot~ting motor 17a or 17b is stopped and the motor 25a is operated to lower the chassis 1 to the concrete floor surface, which ~ 2'~713~
completes a turn of the machine.
Thus, compared witl the case of turning the machine simply by means of a difference in moving speed between the right and left crawler propelling apparatus A, this machine is turned causing almost no damage to the concrete floor surface, with a small radius of swivelling, and accurately to a predetermined position.
On the other hand, springs 28, 29 fitted on the finishing apparatus side tubular member 13 are interposed between a first flange 26 provided inkegral with the tubular member 13 and a lower end of the ball-surfaced mounting seat 14a for the inner finishing apparatus Xa and between a second flange 27 loosely:fitted on the tubular member 13 and an upper end of the ball-surfaced mounting seat 14a, respectively. A nut 30 is screwed onto the tubular member 13 at a position above the second ~lange 27.
The ball-surfaced mounting seat 14a is vertically moved together with the second flange 27 by turning the nut 30 while confirming a pressure given by three pressing force adjusting load cells 31 interposed between the second flange 27 and the nut 30. Thus a pressing force applied to the concrete floor surfaces by the trowel-like members 7a of the inner finishing apparatus Xa is adjustable to a predetermined pressure.
7~34~
Springs 34, 35 fit-ted on the finishirlg apparatus side tubul~r member 13 are interposed between a third flange 32 provided integral with the tubular member 13 and a lower end of the ball-surfaced mounting seat 14b S for the outer finishing apparatus Xb and between a fourth flange 33 loosely fitted on the tubular member 13 and an upper end of the ball-surfaced mounting seat 14b, respectively. A nut 36 is screwed onto the tubular member 13 at a position above the fourth flange 33. The ball-surfaced mounting seat 14b is vertical~y moved together with the fourth flange 33 by turning the nut 36 while confirming a pressure given by three pressing force adjusting load cells 37 interposed between the fourth flange 33 and the nut 36. Thus a pressing force applied to the concrete floor surfaces by the trowel-like members 7b of the outer finishiny apparatus Xb also is adjustable to a predetermined pressure.
Therefore, in -the case of differentiating the inclination angles with respect to the concrete floor surfaces between trowel-like members 7a of the inner finishing apparatus Xa and the trowel-like members 7b of the outer finishing apparatus Xb or differentiating the rotating speeds between the two finishing apparatus Xa, Xb as described hereinbeforer for e~ample, in order to carrying the interim finish and final finish simultaneousl~, the reaction forces the -` ~;27134~.
two finishing apparatus Xa, Xb receive from l:h~
concrete floor surfaces may be sufficiently offset by suitably adjusting the pressing forces of the two finishing apparatus Xa, Xb respecti~ely.
The adjustment of the pressing forces applied to the concrete floor surfaces by the trowel-li]ce members 7a, 7b may be carried out by using the described motor 25a to vary positions of the pair of finishing apparatus Xa, Xb relative to the chassis 1 while confirming the pressure given by the pressing force adjusting load cells 31, 37, instead of the described mode relying on turning of the nuts 30, 36. Number 3~
in the drawings denotes a load cell for detecting a rotational torque.
Cabtyre cords 53 for transmitting control signals to the described pair of propelling motors 5, finislling apparatus rotating motors l7a, 17b and motor 25a are contained in a batch in the two tubular members 13, 22 and are connected to a control unit ~0 in a relay box 39 mounted on top of the finishing apparatus side tubular member 13. As shown in Fig. 1, this control unit 40 is connected to an operating unit 44 through a connector 41 on top of the relay box 39 and a relay cord 43 coiled on a rod 42 extending to the connector 41 to enable a worker to handle the operating unit 44 and remote-control the operations of this concrete floor finishing machine.
L.3~
Another embodiment will be described next with reference to Figs. 6 and 7. In this e~ample the ~rive mechanism 17 comprises a single motor 17a.
As shown in Figs. 6 and 7, each of the pipe Erames 8a constituting the inner finishing apparatus Xa driven by the single motor 17a has a root end thereof secured to a periphery of an annular coupler 12a above the chassis 1. This coupler 12a is attached, for relative rotation about an axis P2, to a ball-surfaced mounting seat 14a vertically slidably fitted on a tubular sleeve 60 rotatably and slidably fitted on an upstanding finishing apparatus side tubular member 13 through a pair of upper and lower bearings 59.
Furthermore, this sleeve 60 has a bevel gear 51a fixed to a lower end thereof which is operatively connected through a free rotation bevel gear 51b attached to the finishing apparatus side tubular member 13, to a bevel gear 51c fixed to the hracket 16a. Thus, rotations of the single motor 17a cause each of the trowel-like members 7b of the outer finishing apparatus Xb to revolve round the chassis 1 in a direction opposite to a direction in which each trowel-like member 7a of the inner finishing apparatus Xa revolves to smooth out the concrete floor surfaces in half-set state in cooperation with the inner finishing apparatus Xa.
By arranging that the two finishing apparatus Xa, Xb are driven by the single motor 17a as described ~L~7 ~1 3~1 above, the entire weight is reduced and a rotat:iGnal .Ereyuency ratio between the two f:inishing apparatus Xa, Xb is maintained constant at all times even if a difference occurs in the reaction forces acting on the S two finishing apparatus Xa, Xb.
On the other hand, as particularly shown in Fig.
7, springs 28', 29' fitted on the sleeve 60 and tubular member 13 and are interposed between the bevel gear 51a attached to the sleeve 10 and a lower end of the ball-surfaced mounting seat 14a for the inner finishing apparatus Xa and between a flange 27' loosely fitted on the tubular member 13 at an upper position of the tubular member 13 and an upper end of the ball-surfaced mounting seat 14a, respectively. A
nut 30' is screwed onto the tubular member 13 at a position above the flange 27'. The two mounting seats 14a, 14b are vertically moved together with the flange 27' by turning the nut 30' while confirming a pressure given by three pressing force adjusting load cells 37 interposed between the flange 27' and the nut 30'.
Thus a pressing force applied to the concrete floor surfaces by the trowel-like members 7a, 7b o~ the inner and outer finishing apparatus Xa is adjustable to a predetermined pressure.
It will be clear that the following varied modifications may be made to the above two embodiments.
t7~34~
First, the pair of ri.ght ~nd le~t craw:l.er propelling apparatus A may be replaced by a plurality of righthand side drive rollers and a plurality of lefthand side drive rollers. These are called propelling apparatus A.
The structure for permitting a ver-tical rela-tive movement between the chassis 1 to which the propelling apparatus A are attached and the finishing apparatus X
may be varied as appropriate. .For example, the linear bearing 23a in the preceding embodiment may be replaced by a combination of rack and pinion gear for use in connecting the chassis 1 and the finishing apparatus B, with a reversible motor operatively connected to the pinion gear~ Also in the preceding embodiment a double acting hydraulic cylinder may be employed in place of the motor 25a, and these are called the drive mechanism 25. Furthermore, the preceding embodiment has been described as having the chassis 1 and the ~inishing apparatus X vertically movable relative to each other by action of the drive mechanism to permit the machine to turn round with a small turning radius and causing little damage to the concrete surfaces. The finishing apparatus side tubular member 13 relatively rotatably carrying the finishing apparatus X may be fixable to the chassis 1 simply by a bolt. This bolt, the above described combination of rack and pinion gear, and the linear . ~ ~
713~il.
bearing 23a ln the preceding embodiment are collectively called the coupling mechanism 23.
The shape, mounting structure and number of the trowel-like rnembers 7a, 7b constituting the inner finishlng apparatus Xa and outer finishing apparatus Xb may be varied as appropriate. For example, the trowel-like members 7a, 7b may revolve round the chassis 1 while themselves rotating about axes by which they are attached to the pipe frames 8a, 8b.
For rotating the finishing apparatus X about the chassis 1, the mode as employed with the preceding embodiment including the inner finishing apparatus rotating motor 17a and outer finishing apparatus rotating motor 17b may be replaced by an arrangement in which rotors are mounted in the annular couplers 12a, 12b carrying the pipe frames 8a, 8b and stators are mounted in the ball-surfaced mounting seats 14a, 14b such that this coupling structure per se constitutes electromotors.
The arrangernent for adjusting the pressing force of the two finishing apparatus Xa, Xb may also take various forms. For example, a concrete hardness detector comprising a load cell and a steel bar or the like attached to an extreme end of the load cell, so that the load cell detects a load requir~d for causing a certain length of the steel bar to project into the concrete floor in half-set state, the detected load 127~ 3~
providing a basis for deriving a proper pressing force which is to be indicated~ Or the proper pressing force value obtained by this concrete hardness detector and the pressure values given by the pressing force adjusting load cells 31, 37 may be input to a control circuit of the linear head motor 25a, whereby this motor 25 automatically adjusts the pressing force. Instead of the load cells 31, 37 varied types of pressure sensors may be used for the purpose of confirming the pressing force The foregoing embodiments have ~een described as having one inner finishing apparatus Xa and one outer finishing apparatus Xb, the two finishing apparatus Xa, Xb being rotated in opposite directions, but in practising the present invention three or more finishing apparatus X may be provided. More particularly, three finishing apparatus X may be provided, for example, one o~ which is rotated in a direction opposite to the direction of rotation of the other two, or four finishing apparatus X may be provided and two of them are rotated in a direction opposide to the direction of rotation of the other two. In such a case the reaction forces the finishing apparatus X receive from the concrete floor surface may be offset to free the propelling apparatus A of a moment, by appropriately diEferentiating the numbers of trowel-like members constituting the respective Einishing apparatus X or, as described hereinbefore, appropriately differentiating the pressing forces of the respective finishing apparatus XO In short, it serves the purpose to cause at least one of the S plurality of finishing apparatus X to rotate about the propelling apparatus A in a direction opposite to a direction of rotation of the other finishing apparatus X.
Furthermore, the method of machine control may be varied as appropriate. For example, a radio receiver may be provided in place of the relay box 39 in the foregoing embodiments so that signals are sent from a radio transmitter handled by a worker to the radio receiver for controlling the machine. Alternatively, completely automatic controls may be provided by equipping the concrete floor finishing machine with a position detecting sensor to recognize a position where the machine actually stands, whereby the operation is carried out as running courses are determined based on information from this sensor and from the hardness detector.
Industrial Applicability As described hereinbefore, the concrete floor finishing machine embodying the present invention is well suited for efficiently smoothing out concrete floor surfaces in half-set state.
Claims (5)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A concrete, floor finishing machine comprising fin-ishing apparatus for smoothing out concrete floor surface in half-set state, a coupling mechanism for coupling the finishing apparatus to a chassis such that the finishing apparatus lie out-wardly of propelling apparatus, and a first drive mechanism for causing the finishing apparatus to revolve round the propelling apparatus, wherein the finishing apparatus are operatively con-nected to the first drive mechanism such that at least one of the finishing apparatus revolves round the propelling apparatus in a direction opposite to a direction in which the other finishing apparatus rotates.
2. A concrete floor finishing machine as defined in claim 1, wherein each of the plurality of finishing apparatus includes a plurality of trowel-like members, the plurality of trowel-like members being arranged radially about the propelling apparatus and the coupling mechanism is vertically extendible and contractible by a second drive mechanism.
3. A concrete floor finishing machine as defined in claim 2, wherein the first drive mechanism includes two motors and said at least one of the finishing apparatus is driven by one of the motors while the other finishing apparatus is driven by the other motor.
4. A concrete floor finishing machine as defined in claim 2, wherein the first drive mechanism includes a single motor and the two finishing apparatus are driven by the single motor.
5. A concrete floor finishing machine as defined in claim 4, wherein the two finishing apparatus have the trowel-like members thereof arranged on concentric circles around the chas-sis.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60-19709 | 1985-02-04 | ||
| JP1970985A JPS61179957A (en) | 1985-02-04 | 1985-02-04 | Concrete floor finishing machine |
| JP60-200977 | 1985-09-11 | ||
| JP20097785A JPS6263760A (en) | 1985-09-11 | 1985-09-11 | Concrete floor finishing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1271341A true CA1271341A (en) | 1990-07-10 |
Family
ID=26356552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000500950A Expired - Fee Related CA1271341A (en) | 1985-02-04 | 1986-02-03 | Concrete floor finishing machine |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA1271341A (en) |
| WO (1) | WO1986004633A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2025831A3 (en) * | 2007-08-16 | 2012-08-08 | Wacker Neuson Production Americas LLC | Concrete trowel transport system |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61270455A (en) * | 1985-05-24 | 1986-11-29 | 株式会社竹中工務店 | Concrete floor finisher |
| CN104612381B (en) * | 2014-12-31 | 2017-02-22 | 山东建筑大学 | Turnover device for hopper of troweling machine |
| CN110565925B (en) * | 2019-09-11 | 2021-03-19 | 广东博智林机器人有限公司 | Floating robot |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6047159A (en) * | 1983-08-24 | 1985-03-14 | 株式会社大林組 | Automatic running floor finishing apparatus |
| JPS60105757A (en) * | 1983-11-11 | 1985-06-11 | 株式会社竹中工務店 | Concrete floor finishing machine |
| JPS60130943U (en) * | 1984-02-13 | 1985-09-02 | 鹿島建設株式会社 | concrete finisher |
-
1986
- 1986-01-31 WO PCT/JP1986/000041 patent/WO1986004633A1/en unknown
- 1986-02-03 CA CA000500950A patent/CA1271341A/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2025831A3 (en) * | 2007-08-16 | 2012-08-08 | Wacker Neuson Production Americas LLC | Concrete trowel transport system |
| AU2008203808B2 (en) * | 2007-08-16 | 2014-06-05 | Wacker Neuson Production Americas Llc | Concrete trowel transport system |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1986004633A1 (en) | 1986-08-14 |
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