JPH081658A - Vacuum device in cutting device for concrete or the like - Google Patents

Abstract

PURPOSE:To facilitate assembly and reduce a loss in transmission by a method wherein in a vacuum device provided in a cutting device for concrete or the like, a discharge pump and a sucking blower are balanced in capacity, and a drive transmission mechanism is simplified. CONSTITUTION:A vacuum device 4 comprises a drive transmission mechanism 46 provided with a first drive transmission system for transmitting rotation outputted from a prime motor 5 to both a discharge pump drive system and a sucking blower system and a second drive transmission system for increasing the speed of the output rotation of the prime motor 5 transmitted to the sucking blower drive system and transmitting the rotation to a sucking blower 42.

Description

Detailed Description of the Invention

[0001]

[Object of the invention]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting device used for cutting a road surface, for example, concrete, asphalt, etc., and is particularly provided in the cutting device, and air, water, mud, etc. around the cutting site. The present invention relates to a vacuum device that sucks in and discharges it to the outside.

[0002]

BACKGROUND OF THE INVENTION When cutting a road surface once paved with concrete, asphalt or the like by a waterworks or gas work that occurs after that, a cutting device having a disk-shaped blade called a blade is used. As the cutting device, in addition to the blade, a carriage-shaped main body frame having traveling wheels at the bottom is mounted with a prime mover that is a drive source of the blade, and an operation handle is provided on the upper portion of the main body frame. There is a manual traveling type cutting device which holds the operation handle in its hand to perform work.

[0003] Further improvement of this product and improvement in workability include a self-propelled device in which power is transmitted to the traveling wheels, and a vacuum device is mounted to suck chips and sludge. There is a cutting device. Among them, a vacuum device 4'having a configuration as shown in FIG. 11, for example, is used for the cutting device equipped with the vacuum device.

The illustrated vacuum device 4'includes a vacuum unit 40 'including a discharge pump 41' and a suction blower 42 ', and a drive transmission mechanism 46' for transmitting the output rotation of the prime mover to the vacuum unit 40 '. A vacuum tank 43 'for separating the sucked air, water, mud, etc. into air, a liquid content and a solid content, and these vacuum units 4
0'and the vacuum tank 43 ', and between the vacuum tank 40' and the blade cover 2'which is a protective cover for the blade B.

Of these, the drive transmission mechanism 46 'takes out the power of the prime mover from its output pulley 50, first transmits it to the intermediate shaft pulley 47', and the power transmitted to this intermediate shaft pulley 47 'is the same. From the two driven pulleys 47a ′ provided on the shaft of the blower drive pulley 4
9'and the reduction gear pulley 48 ', and the power transmitted to the reduction gear pulley 48' is reduced by the reduction gear and transmitted to the pump drive pulley 481.

[0006] and transmitting flat belt B _F of three of the transmission belt B _V and one as shown in FIG. 11 is wound between these pulleys, these transfer belts B _V and transmission flat belt B _F For each of the above, one tension pulley P _T is provided.

However, in the case of the drive transmission mechanism 46 'having such a structure, particularly when transmitting power to the discharge pump 41', transmission to the intermediate shaft pulley 47 ', transmission to the reduction gear pulley 48' and It requires a total of three transmission paths for transmission to the pump drive pulley 481, and along with this,
It requires a considerable mounting space for these transmission members,
In addition, the assembly becomes complicated and various problems such as making the centering work of the transmission flat belt B _F extremely difficult and further increasing the transmission loss (generated by slippage of the transmission belt B _V ) may occur. It was pointed out more.

On the other hand, the power transmission to the suction blower 42 'is
Transmission to the intermediate shaft pulley 47 'and blower drive pulley 4
Two transmission paths for transmission to 9'are taken, and follow a transmission system path different from the transmission of power to the discharge pump 41 'except for transmission to the intermediate shaft pulley 47'. In addition to this, there are various transmission paths (in particular, the discharge pump 41 ').
Also, the discharge pump 41 ′ and the suction blower 42 ′ may not be synchronized with each other, that is, the rotation speed may not be balanced, and the discharge pump 41 ′ or the suction blower 42 ′ may have insufficient capacity. Was there.

[0009]

The present invention has been devised in order to solve the above problems by recognizing such a background, and the present invention has been devised to reduce the number of transmission paths to thereby provide a drive transmission mechanism. The present invention proposes a new vacuum device for a cutting device for concrete or the like, which simplifies the process and balances the capabilities of the discharge pump and the suction blower.

[0010]

Configuration of the Invention

That is, a vacuum device in a cutting device for concrete or the like according to claim 1 comprises a blade which directly acts on a work piece at a lower portion of a main body frame to cut the work piece, and a cutting device including the blade. In a cutting device for concrete or the like, which is provided with a traveling mechanism for moving in the traveling direction or for assisting in moving, and further, at least the prime mover serving as a drive source for the blades and the like is mounted on the main body frame. The cutting device is further provided with a vacuum device for sucking air, water, mud, etc. around the cutting portion, and the output rotation of the prime mover is supplied to both the discharge pump drive system and the suction blower drive system in the vacuum device. The primary drive transmission system for transmission and the output rotation of the prime mover transmitted to the suction blower drive system are further accelerated,
A drive transmission mechanism comprising a secondary drive transmission system for transmitting to a suction blower is provided.

Further, in the vacuum device in the cutting device for concrete or the like according to claim 2, in addition to the above requirements, the discharge pump drive system sets a predetermined output rotation of the prime mover transmitted by the primary drive transmission system. It is characterized by comprising a speed reducer for reducing the rotation speed and a discharge pump having the output shaft of the speed reducer as an input shaft.

Furthermore, in addition to the above requirements, the vacuum device in the cutting device for concrete or the like according to claim 3,
The vacuum device, a vacuum unit comprising a discharge pump and a suction blower in a suitable housing,
A drive transmission mechanism that transmits the output of the prime mover to this vacuum unit, a vacuum tank that separates sucked air, water, mud, etc. into air, liquid and solid, and between these vacuum unit and vacuum tank, and It is characterized in that it is provided with a communication conduit provided between the tank and the blade cover. Then, the constitutions of these inventions are used as means to achieve the above object.

[0013]

According to the first aspect of the present invention, there is provided a vacuum device in a cutting device for concrete or the like, wherein a primary drive transmission system for transmitting output rotation of a prime mover to both a discharge pump drive system and a suction blower drive system, and a suction blower. A drive transmission mechanism including a secondary drive transmission system that further increases the output rotation of the prime mover transmitted to the drive system and transmits it to the suction blower is provided. As a result, the output rotation of the prime mover is simultaneously transmitted to both the discharge pump drive system and the suction blower drive system.
In addition to contributing to balance the performance of these two drive systems, that is, the discharge pump and the suction blower, by omitting the transmission path between the driven pulley and the speed reducer pulley, the transmission path is simplified. As a result, the number of parts can be reduced, assembly becomes easier, and transmission loss can be reduced.

A vacuum device in a cutting device for concrete or the like according to claim 2 is configured by including a discharge pump drive system with a speed reducer, and a discharge pump having an output shaft of the speed reducer directly as an input shaft. There is. This allows the output of the speed reducer to be directly transmitted as the input of the discharge pump, eliminating the transmission loss in this part and omitting the transmission path between the speed reducer pulley and the pump drive pulley. Thus, the transmission path can be simplified, and the number of parts can be reduced correspondingly, which facilitates the assembly.

A vacuum device in a cutting device for concrete or the like according to claim 3 is a vacuum unit comprising a discharge pump and a suction blower, the drive transmission mechanism, and suctioned air, water, mud, etc. And a solid content, and a connecting pipe provided between the vacuum unit and the vacuum tank and between the vacuum tank and the blade cover. As a result, in the vacuum device having the above-described structure, in addition to the effect of the invention described in claim 1 or 2, the cutting device can be reduced in size and weight as the drive transmission mechanism is simplified.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A vacuum device in a cutting device for concrete or the like according to the present invention will be specifically described below with reference to the drawings. In the following description, as an example of a cutting device for concrete to which the vacuum device of the present invention is applied, a cutting device for cutting a road surface paved with concrete, asphalt, or the like will be taken as an example, and the configuration of the entire cutting device will be described. Now, the structure of the vacuum device of the present invention will be described.

In FIG. 1, reference numeral 1 is a cutting device to which the vacuum device 4 of the present invention is applied. This cutting device assembles, for example, a metal square pipe, an angle member or the like into an appropriate frame shape. The main body frame 1 which is formed by the above-mentioned structure and acts as a supporting member for various members described below.
It is equipped with 0. That is, the main body frame 10 is directly processed by a workpiece W (a paved road surface in the present embodiment. In the present specification, a paved road surface is a layer of paved concrete or asphalt having a certain thickness. A disk-shaped blade B for cutting the workpiece W is attached. Specifically, the shaft holder 11 is provided on the lower surface in the forward direction of the main body frame 10 (the direction in which the workpiece W is cut by the blade B), and the rotary shaft 12 is fitted into the shaft holder 11 internally. The blade B is attached to one end of the rotary shaft 12.

Further, below the main body frame 10, the main body frame 10 on which the above-mentioned members and the members described below are mounted.
A traveling mechanism 3 for moving forward and backward is provided. In this embodiment, the traveling drive wheel 30 and the auxiliary wheel 31 constitute the traveling mechanism 3, of which the traveling drive wheel 30 is arranged rearward of the main body frame 10 in the traveling direction, and the power from the prime mover 5 is transmitted to the transmission 32. It is configured to be transmitted and driven via. On the other hand, the auxiliary wheel 31 is not driven and is disposed near the middle of the blade B and the traveling drive wheel 30, and the auxiliary wheel 31 always contacts the surface A to be processed regardless of the undulations and the shape of the surface A to be processed. The urging arm 33 is constantly urged toward the surface A to be processed so as to come into contact with and rotate freely. In addition, the traveling mechanism 3 may be composed of only non-driving traveling wheels. In this case, the operator holds the operation handle 70 in his hand and presses the operation handle 70 to perform the cutting process, which is the manually-operated cutting device 1. In addition, the prime mover 5
In addition to an engine that is an internal combustion engine, the term includes other driving means such as an electric motor and a hydraulic motor.

In addition to the above, a regulating plate 13 and an engaging hook 14 which are engaging members with the blade cover 2 which will be described later are provided on the lower portion of the main body frame 10, and the main body frame 10 is also provided.
In addition, the vacuum device 4 of the present invention for sucking air, water, mud in the blade cover 2 or chips generated by cutting, a prime mover 5 as a drive source of the blade B, and a blade for cutting work. At least the gauge 6 serving as the B machining guide is mounted.

The structure of the main one of these members will be described more specifically below. First, the blade cover 2 that protects the blade B and prevents the operator from touching the blade B during processing will be described. The blade cover 2 is positioned above the surface A to be processed with a certain gap therebetween, and is provided on the periphery of the blade B in the horizontal cross-section direction.
0 is basically provided with a cover main body 25 integrally provided above it.

The lower frame 20 is, for example, formed by connecting metal square pipes in a plane rectangular shape, and the upper surface of the lower frame 20 is communicated with a vacuum device 4 of the present invention described later. A connection port 20a for connecting to the conduit 45 is provided, and a suction port 2 for air, water, mud, etc. sucked by the vacuum device 4 is provided on the bottom surface of the lower frame 20.
0b is provided. Further, a brush 21 is provided on the lower outer peripheral edge of the lower frame 20 to maintain the airtightness inside the blade cover 2.

Further, handles 22 are provided on the front and rear edges of the lower frame 20 in the traveling direction, and the blade cover 2 is attached and detached by the handles 22. In addition to the above, the lower frame 20 is provided with an engaging rod 23 on the rear side in the traveling direction. The engagement rod 23 is, for example, two T-shaped rods connected to be orthogonal to each other and formed into a T-shape in a plane. Of these, the rotating shaft portion 23a is located in the width direction of the cutting device 1, and is the body frame 10
It is configured so that it can be engaged with the above-mentioned engagement hook 14 provided for the blade cover 2 and can rotate the blade cover 2 around the rotation shaft portion 23a over a range of a certain angle.

The cover main body 25 provided above the lower frame 20 is arranged so that two semicircular side plates 26 are opposed to each other, and only the arc-shaped peripheral edge is formed into the arc. Rectangular body plate 2 that is curved together
The blade B is closed by 7, and is provided so as to cover substantially the upper half of the blade B. On the side plate 26 of the cover main body 25 on the main body frame 10 side, a receiving metal fitting 28 that receives the entry of the regulation plate 13 and is loosely fitted to the outside is provided.

That is, a regulation plate 13 having a rectangular flat plate shape is erected upward as an example at the end portion of the body frame 10 facing the cover body 25, and the blade cover 2 is attached to the blade B. In the above, the receiving metal fitting 28 is set in a positional relationship so as to hold the vicinity of the upper end of the regulation plate 13. Further, the fitting of the restriction plate 13 and the receiving metal fitting 28 is set to be considerably loose as can be seen in FIGS. 1, 4 and 5, but this is because the blade cover 2 is different depending on the undulation of the work surface A and the size of the inclination. This is because the blade cover 2 can be rotated about the rotation shaft 23a over a range of a certain angle, and the blade cover 2 can be easily attached to the blade B.

Further, the regulating plate 13 is provided with a locking pin 13a, which abuts against the lower surface of the receiving metal fitting 28 to set the lower limit position of the blade cover 2. Furthermore, the blade cover 2 has a structure shown in FIGS.
As shown in FIG. 3, a part of the lower frame 20 and the cover main body 25 on the main body frame 10 side is cut out, which avoids interference with the rotating shaft 12 of the blade B, and the relative position between the blade B and the blade cover 2. The shaft relief portions 24 and 29 allow the change of

Further, between the blade cover 2 and the main body frame 10 is provided a closing shutter 15 for closing the shaft escape portions 24 and 29 by receiving suction by a vacuum device 4 of the present invention described later. This closing shutter 15
1, 4 and 5 have a rectangular shape as an example, and both side edges of the upper part are bent by 90 ° to form the ear portion 16. Further, as shown in FIGS. 4 and 5, an engagement elongated hole 17 is formed in the ear portion 16, and an engagement pin 13b provided on both side surfaces of the regulation plate 13 is engaged with the engagement elongated hole 17. It is configured to match.

Incidentally, the engagement elongated hole 17 allows the movement of the blade B of the closing shutter 15 along the rotary shaft 12, and in FIGS.
In order to promote the movement of the cover main body 25 toward the cover main body 25 side, the engaging elongated hole 17 is inclined so that the cover main body 25 side is slightly lowered.

Furthermore, an avoidance hole 18 for receiving the rotary shaft 12 of the blade B and avoiding interference between the two is provided in the lower part of the closing shutter 15. The avoiding hole 18 is set to have a diameter slightly larger than the shaft diameter of the rotating shaft 12 of the blade B so that the closing shutter 15 can smoothly move along the rotating shaft 12 of the blade B. By the way, this avoiding hole 18
If the diameter of the blade is made larger than necessary, the airtightness inside the blade cover 2 will be impaired, and the suction force of the vacuum device 4 will be reduced.

Further, in the present embodiment, the closing surface 1 capable of covering at least the shaft escape portion 29 of the cover body 25 around the avoidance hole 18 at least.
9 is formed. 1 and 4,
In the present embodiment shown in FIG. 5, all the surfaces of the closing shutter 15 except the ears 16 on the blade cover 2 side are the closing surfaces 1.
It is 9.

The procedure of attaching and detaching the blade cover 2 and the operating state of the closing shutter 15 when the vacuum device 4 of the present invention is driven and not driven will be described below. First, when the blade cover 2 is attached to the blade B, the handle 22 of the blade cover 2 in which the lower frame 20 and the cover body 25 are integrated is held, and the blade B is covered from above. At this time, in the present embodiment, it suffices to insert the regulating plate 13 into the receiving metal fitting 28 and to align the rotating shaft portion 23a of the engaging rod 23 with the engaging hook 14. ,
Work such as bolt tightening that has been performed conventionally is not required.

The blade cover 2 attached in this manner rotates about the rotation shaft portion 23a over a range of a certain angle, and responds to the ups and downs and the inclination of the work surface A, The brush 21 provided under the lower frame 20 is always grounded to the surface A to be processed.

When the vacuum device 4 of the present invention is driven in such a state, the inside of the blade cover 2 is decompressed, and the closing shutter 1 originally located on the main body frame 10 side.
5 gradually moves along the rotation axis 12 of the blade B, and finally, the lower frame 20 and the cover main body 25.
In close contact with the side plate 26, the shaft escape portions 24 and 29 are closed. Further, when removing the blade cover 2, it is sufficient to hold the handle 22 and pull up the blade cover 2 upward while releasing the engagement of the engagement rod 23 with the engagement hook 14 as in the case of the attachment.

Next, the traveling operation mechanism 3A provided for the purpose of ensuring stable traveling and reliable stopping when the traveling mechanism 3 is of a drive type will be described. Travel operation mechanism 3
A serves to increase the certainty of holding the control shaft 34 in each of the forward, backward, and backward positions of the transmission 32, and an operating lever 35 provided at the upper rear part in the traveling direction of the cutting device 1. , The rotary shaft 35 of the operating lever 35
a lever position holding mechanism 36, a lock bar 37 provided at the tip of the rotating shaft 35a, a lever return prevention mechanism 38 connected to the tip of the lock bar 37, and a lever return prevention mechanism. One end is connected to 38, one end is connected to the connecting rod 39 whose one end is connected to the other lever return prevention mechanism 38 and the other lever return prevention mechanism 38, and the other end is connected to the control shaft 34. It is provided with another connecting rod 39.

Some of these members will be described in more detail below. First, the lever position holding mechanism 36 is shown in FIG.
As shown in (b), two fitting holes 36b for receiving the rotating shaft 35a of the operating lever 35 are formed in the inverted U-shaped holding bracket 36a in a penetrating state, and the rotating shaft 35a is The rotating shaft 35a in the inserted state
With respect to the fitting hole 36b located on the front end side (the side opposite to the side on which the operation lever 35 is attached), the engaging groove 36c having a depth that allows at least a part of the lock bar 37 to be engaged with the fitting hole 36b. Is formed over the entire width of the holding bracket 36a.

Further, in the inner space of the holding bracket 36a, there is provided a cylindrical spring holder 36d which is fitted onto the rotating shaft 35a and is attached to the rotating shaft 35a by a set screw or the like. The rotary shaft 35a is provided in the gap between the inner peripheral surface of the spring holder 36d and the rotary shaft 35a on the operation lever 35 side, that is, the lock bar 37.
Is arranged so that a part of the urging spring S1 for urging the member in the direction of engaging with the engaging groove 36c is included.

Furthermore, a stopper 36e for setting the turning angle of the lock bar 37 is provided on the outer surface of the holding bracket 36a in which the engaging groove 36c is formed. Incidentally, the stopper 36e determines the forward movement position and the backward movement position of the traveling mechanism 3 as shown in FIG. 7B, and the engagement groove 36c determines the stop position of the traveling mechanism 3 and
It serves to hold the stop position.

Next, the lever return prevention mechanism 38 will be described. As shown in FIG. 6, the lever return prevention mechanism 38 is provided with a friction disc 38b between outer discs 38a attached to the tips of the lock bars 37 or the connecting rods 39, and further the outer discs 38a and the friction discs 38a. A bolt 38c, which serves as a rotating shaft, is provided in the center of 38b in a penetrating state, and the friction disc 38b and the outer disc 38a are closely attached between the head of the bolt 38c and one outer disc 38a. A pressing spring S2 that increases the force is provided. In the embodiment shown in FIG. 6, a flat spring is used as the pressing spring S2.

Next, the operating state of the traveling operation mechanism 3A constructed as described above will be described. First, the case where the operation lever 35 is in the stop position in the starting state will be described. In this case, the lock bar 37 is engaged with the engagement groove 36c as shown by the solid line in FIG.
The control shaft 34 in 2 is securely held in the stop position. Then, in order to switch the control shaft 34 from such a state to the forward position or the backward position, the operation lever 35 is held in hand and the rotary shaft 35a is pushed in the direction in which the biasing spring S1 is compressed, and the tip of the rotary shaft 35a is pushed. The engagement between the lock bar 37 and the engagement groove 36c provided on the is released.

Next, the operation lever 35 is rotated until it reaches the forward movement position or the backward movement position. The forward and backward positions are determined by the lock bar 37 coming into contact with the stopper 36e, so that no strict position adjustment is required.
Further, at this time, the lever return preventing mechanism 38 operates, and the control shaft 34 is moved to the forward or backward position by the pressing force of the pressing spring S2 and the frictional force between the outer disk 38a and the friction disk 38b accompanying this. Since it is held, variation in the speed of the traveling mechanism 3 due to the fine movement of the control shaft 34 does not occur.

In addition, the reference numeral T in FIG. 2 is a torque limiter, and the transmission 32 is connected to the prime mover 5 via a V-belt or the like as shown in FIG. This torque limiter T is provided because it is expected that the output of the prime mover 5 will exceed the allowable input of the transmission 32 and damage the transmission 32 when a large resistance is applied to the transmission 30. Further, in FIG. 2, reference numeral F indicates a cooling fan for cooling the transmission 32.

Next, the vacuum device 4 of the present invention will be described. The vacuum device 4 of the present invention includes a vacuum unit 40 including a discharge pump 41 and a suction blower 42 in an appropriate housing H, and the vacuum unit 4
Drive transmission mechanism 46 for transmitting the output rotation from the prime mover 5 to 0
If, sucked air, water, mud, air and chips, etc. A _i and a liquid fraction L
_By providing a vacuum tank 43 for dividing into _i and the solid content S _o , and a communication pipe line 45 provided between the vacuum unit 40 and the vacuum tank 43, and between the vacuum tank 43 and the blade cover 2. Composed.

The vacuum device 4 as described above is driven by a drive transmission mechanism 46 as described below.
That is, the drive transmission mechanism 46 includes a primary drive transmission system that transmits the output rotation of the prime mover 5 to both the discharge pump drive system and the suction blower drive system, and the output rotation of the prime mover 5 transmitted to the suction blower drive system. Is further speeded up and is transmitted to the suction blower 42 by a secondary drive transmission system. The power of the prime mover 5 as a drive source is output to the outside by an output pulley 50 attached to the main power shaft of the prime mover 5. The transmission belt B _V is wound between the output pulley 50 and the intermediate shaft pulley 47 provided for the housing H of the vacuum unit 40 and the reduction gear pulley 48, so that the primary drive transmission system is formed. Composed.

The power transmitted to the intermediate shaft pulley 47 is further transmitted between the driven pulley 47a and the blower drive pulley 49 provided on the same shaft, and the transmission flat belt B is used.
_It is also transmitted to the suction blower 42 by _F , which constitutes a secondary drive transmission system. Further, the speed reducer pulley 4
The power transmitted to 8 is reduced by a speed reducer (not shown), connected to the output shaft of the speed reducer, and transmitted to the discharge pump 41 using the output shaft as it is,
As an example, the discharge pump drive system is configured by these speed reducers and the discharge pump 41. Further, one suction blower drive system is constituted by only the suction blower 42 as an example. In FIG. 8, the reference numeral P _T is a tension pulley for adjusting the tension of the transmission belt B _V or the transmission flat belt B _F.

Further, the connecting pipe 45 is provided in the lower frame 2
0, the suction pipe line 45a connecting the connection port 20a and the vacuum tank 43, the exhaust pipe line 45b connecting the vacuum tank 43 and the suction blower 42, and the vacuum tank 4
3 and is constituted by a drainage conduit 45c connecting the discharge pump 41, the dust collecting basket 44 of solids S _o for recovery is provided in the vacuum tank 43.

Next, the operating state of the vacuum device 4 of the present invention thus constructed will be described. First, when the prime mover 5 is started, the reduction gear pulley 4 is passed through the transmission belt B _V.
The power transmitted to 8 is transmitted to the discharge pump 41 in a state of being decelerated by a speed reducer (not shown), and the discharge pump 41 is driven. The power transmitted to the intermediate shaft pulley 47 is transmitted to the driven pulley 47a and the transmission flat belt B _F.
Is transmitted to the blower drive pulley 49 via the drive mechanism to drive the suction blower 42.

As a result, the drainage line 45c and the exhaust line 4
5b through vacuum tank 43 through suction line 45a
A suction force is generated in the communication pipe line 45 connected to the above, so that air, water, mud, chips, etc. in the blade cover 2 are sucked and reach the inside of the vacuum tank 43. Further, these are classified into an air A _i , a liquid component L _i and a solid component S _o in the vacuum tank 43, of which the air A _i is the exhaust pipe line 45.
It is sent to the suction blower 42 via b and is exhausted from the exhaust port 42a toward the lower side of the cutting device 1.

Further, the liquid component L _i is sent to the discharge pump 41 via the drainage pipe 45c and is discharged to the outside as fresh water or is stored and recovered in a separate recovery tank (not shown). Further, the solid content S _o is collected by the water-permeable dust collecting basket 44, the upper lid of the vacuum tank 43 is opened, and the dust collecting basket 44 is taken out and discarded.

Incidentally, with such a structure, the structure of the vacuum device 4 can be simplified, the assembly work can be facilitated, the size and weight of the device can be reduced, and the transmission flat belt B _F can be dropped or damaged. Further, the discharge pump 41 and the suction blower 42 are synchronized with each other, and the ability balance between the two can be obtained.

Next, the gauge 6 and the lift drive mechanism 60 for the gauge 6 will be described. The gauge 6 is a processing guide member that enables the blade B to cut the paved road surface as the workpiece W along the cutting guide line (not shown) marked on the surface A to be processed as described above. The structure is such that a strip-shaped gauge piece 6a whose tip is cut obliquely is provided with a rotary bearing portion 6b on the base end side thereof, and is driven up and down by an elevator drive mechanism 60 as described below. , And is configured to move between the guide action position P ₁ and the storage position P ₂ .

The lifting drive mechanism 60 is fitted inside the rotary bearing portion 6b of the gauge 6, and the rotary arm 62 is provided with a rotary shaft 61 for holding the gauge 6 rotatably at the tip.
A rotatable bracket 63 provided on the base end side of the rotatable arm 62 and rotatably attached to the body frame 10 together with the rotatable arm 62; A stopper 64 that determines the lower limit position of the gauge 6 by contacting the arm 62,
A return spring S3 having one end fixed to the universal bracket 63 and the other end fixed to the rotating arm 62, and a base end rotatably rotatably supported with respect to the main body frame 10, and a tip of a slider 65a thereof. And a lifting / lowering shifter 65, such as an electric cylinder, which is rotatably supported by the flexible bracket 63.

The manner in which the gauge 6 is driven up and down by the lifting drive mechanism 60 will be described in the light of the actual work of cutting the paved road surface as the workpiece W by the cutting device 1. First, a cutting guide line is drawn on the surface of the paved road surface to be cut (that is, the processed surface A). Next, the blade B is aligned so as to be located on this cutting guide line, and then the slider 65a of the elevating shifter 65 is extended, and the universal bracket 63 is rotated by approximately 90 ° to move the gauge 6 to the guide action position P _1. Lead to. Incidentally, in this state, the lower end of the gauge 6 is located slightly above the work surface A.

Then, the operator holds the operation handle 70 in his hand and operates so that the gauge 6 is always positioned on the cutting guide line, and cuts the paved road surface with the blade B. At this time, even if changes in undulations or irregularities due to foreign matter appear on the cutting guide line in the middle, if it is small, the gauge 6 rotates about the rotation shaft 61, so there is no particular problem in traveling. .

When the undulations or irregularities become larger and the gauge 6 cannot be rotated by itself, the slider 65a of the elevating shifter 65 is contracted to rotate the universal bracket 63 and the rotating arm 62. Let me gauge 6
To avoid a large amount. After passing through the undulations or irregularities, the slider 65a of the elevating shifter 65 is extended again, and the gauge 6 provided at the tip of the rotating arm 62 is lowered to the guide action position P ₁ .

After the processing with the blade B is completed, the slider 65a of the elevating shifter 65 is contracted to the full extent, and the gauge 6 reaches the storage position P ₂ .
A locking ring 66 is provided near the tip of the rotating arm 62. If necessary, one end of a rope or the like is locked to the locking ring 66 and the other end of the rope or the like is locked. By extending the operation handle 70 side, in addition to the elevating drive of the gauge 6 by the elevating shifter 65, the elevating movement of the gauge 6 can be performed by pulling and loosening this rope or the like. It is a thing.

The vacuum device 4 of the present invention and the cutting device 1 equipped with the same are used for cutting road surfaces paved with concrete, asphalt, etc. The cutting device 1 including the above is not limited to this, and cuts a concrete foundation or block, or the traveling drive wheel 30 and the auxiliary wheel 31.
In place of the blade B, the main body frame 10 is supported by a guide rail, which is driven by, for example, a screw shaft having a ball screw or a trapezoidal screw engraved and a female screw block screwed to the screw shaft. By attaching a plate-shaped grindstone, it is possible to use it as a cutting device 1 for cutting wood or a metal material.

[0056]

The vacuum device in the cutting device for concrete or the like of the present invention is constituted by having the above-mentioned constitution, and by having such constitution, the following effects are exhibited. . The vacuum device in the cutting device for concrete or the like according to claim 1, wherein the output rotation of the prime mover 5 is transmitted to both the discharge pump drive system and the suction blower drive system, and is transmitted to the suction blower drive system. A drive transmission mechanism 46 including a secondary drive transmission system for further increasing the output rotation of the prime mover 5 and transmitting the output rotation to the suction blower 42 is provided. As a result, the output rotation of the prime mover 5 is simultaneously transmitted to both the discharge pump drive system and the suction blower drive system, which contributes to balance the performance of both drive systems, that is, the discharge pump 41 and the suction blower 42. By omitting the transmission path between 47a and the speed reducer pulley 48, the transmission path can be simplified, and the number of parts can be reduced correspondingly, facilitating the assembly and reducing the transmission loss. Will also be able to contribute.

A vacuum device in a cutting device for concrete or the like according to claim 2 is configured by including a discharge pump drive system with a speed reducer, and a discharge pump 41 having an output shaft of the speed reducer as an input shaft as it is. ing. This allows the output of the speed reducer to be directly transmitted as the input of the discharge pump 41, eliminating the transmission loss in this portion, and omitting the transmission path between the speed reducer pulley 48 and the pump drive pulley 481. By doing so, the transmission path can be simplified, and the number of parts can be reduced accordingly, and the assembly is facilitated.

A vacuum device in a concrete cutting device according to a third aspect of the present invention is a vacuum unit 40 comprising a discharge pump 41 and a suction blower 42, the drive transmission mechanism 46, and sucked air, water, mud and the like. Vacuum tank 43 for separating air, liquid L ₁ and solid S ₀
And a communication conduit 45 provided between the vacuum unit 40 and the vacuum tank 43 and between the vacuum tank 43 and the blade cover 2. As a result, in the vacuum device 4 having the above-described configuration, the effect of the invention according to claim 1 or 2 can be obtained, and the simplification of the drive transmission mechanism 46 can contribute to downsizing and weight saving of the cutting device. .

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing a cutting device for concrete or the like to which a vacuum device of the present invention is applied.

FIG. 2 is a rear view of the same.

FIG. 3 is a side view showing the transmission mechanism of the prime mover and the transmission and the traveling operation mechanism in a see-through manner.

FIG. 4 is an exploded perspective view showing the periphery of a blade cover attachment portion.

FIG. 5 is a vertical sectional front view of the same.

FIG. 6 is a vertical sectional side view showing a lever return prevention mechanism.

7A and 7B are a vertical sectional side view and a front view showing an enlarged operation lever and lever position holding mechanism.

FIG. 8 is a side view showing a drive transmission mechanism of the vacuum device of the present invention.

FIG. 9 is an exploded perspective view showing a gauge and a lifting drive mechanism thereof.

FIG. 10 is a side view of the same.

FIG. 11 is a vertical cross-sectional side view showing the configuration of a conventional drive transmission mechanism.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Cutting device 2 Blade cover 3 Travel mechanism 3A Travel operation mechanism 4 Vacuum device 5 Motor 6 Gauge 6a Gauge piece 6b Rotating bearing part 10 Main body frame 11 Shaft holder 12 Rotating shaft 13 Regulation plate 13a Locking pin 13b Engaging pin 14 Engagement Combined hook 15 Closure shutter 16 Ear 17 Engagement slot 18 Avoid hole 19 Closure surface 20 Lower frame 20a Connection port 20b Suction port 21 Brush 22 Handle 23 Engaging rod 23a Rotating shaft 24 Shaft escape 25 Cover body 26 Side plate 27 Body Plate 28 Receiving Metal Fitting 29 Shaft Escape Part 30 Travel Drive Wheel 31 Auxiliary Wheel 32 Transmission 33 Biasing Arm 34 Control Shaft 35 Control Lever 35a Rotating Shaft 36 Lever Position Holding Mechanism 36a Holding Bracket 36b Fitting Hole 36c Engagement Groove 36d Spring holder 36e Stopper 37 Lock bar 38 Lever return prevention mechanism 38a Outer disc 38b Friction disc 38c Bolt 39 Connecting rod 40 Vacuum unit 41 Discharge pump 42 Suction blower 42a Exhaust port 43 Vacuum tank 44 Dust collection basket 45 Communication line 45a Suction line 45b Exhaust pipe Line 45c Drainage line 46 Drive transmission mechanism 47 Intermediate shaft pulley 47a Driven pulley 48 Reducer pulley 481 Pump drive pulley 49 Blower drive pulley 50 Output pulley 60 Lifting drive mechanism 61 Rotating shaft 62 Rotating arm 63 Flexible bracket 64 Stopper 65 lifting shifter 65a slider 66 locking ring 70 operating handle A treated surface A _i air B blade B _F transmission flat belt B _V transmission belt F cooling fan H housing L _i liquid fraction P ₁ guiding action position P ₂ storage position P _T tension pulley S1 Energizing spring S2 Pressing spring S3 Return spring S _O Solid content T Torque limiter W Workpiece

Claims (3)

[Claims] 1. A blade for directly acting on a work piece to cut the work piece, and a traveling mechanism for assisting in moving or moving a cutting device including the blade in a traveling direction at a lower portion of a main body frame. In addition to the above, further, in the main body frame, in a cutting device such as concrete in which at least a prime mover serving as a drive source for the blades and the like is mounted, the cutting device further includes air, water, mud, etc. around the cutting site. Is provided with a vacuum device, which transfers the output rotation of the prime mover to both the discharge pump drive system and the suction blower drive system, and to the suction blower drive system. And a secondary drive transmission system for further increasing the output rotation of the prime mover and transmitting it to the suction blower. Vacuum device for cutting equipment such as concrete. 2. The discharge pump drive system reduces the output rotation of the prime mover transmitted by the primary drive transmission system to a predetermined number of revolutions, and an output shaft of the reducer as it is as an input shaft. A vacuum device in a cutting device for concrete or the like according to claim 1, comprising a discharge pump. 3. The vacuum device includes a vacuum unit having a discharge pump and a suction blower in an appropriate housing, a drive transmission mechanism for transmitting the output of a prime mover to the vacuum unit, and suctioned air, water, and mud. And the like, and a vacuum tank for separating air, liquid and solids, and a connecting pipe provided between the vacuum unit and the vacuum tank, and between the vacuum tank and the blade cover. A vacuum device in a cutting device for concrete or the like according to claim 1 or 2.