JP6346871B2 - Cutting dust collecting device in pavement material cutting device and pavement material cutting device - Google Patents

Description

  The present invention relates to an apparatus for performing cutting / cutting of a pavement surface, for example, without using cooling water, and in particular, cutting dust (cutting powder particles) discharged with the cutting / cutting operation efficiently and efficiently. The present invention relates to a novel cutting dust collecting device that can be reliably collected and a pavement material cutting device to which the cutting dust collecting device is applied.

Prior to excavation work and repair work on the road, cutting and cutting work is performed to cut the pavement surface. This operation is performed by a paving material cutting device that drives a cutter blade with engine power or the like. As for the outline of this device, a traveling device (wheel device) for movement is provided below the main body, and one or more cutter blades are provided at the lower portion of the main body, and further mounted in the main body. A cutter blade is driven by a drive source device (engine), and the paved surface is appropriately cut and cut.
By the way, during this operation, a large amount of cutting dust (cutting powder particles) is discharged along with the operation of cutting the pavement surface (hereinafter, this operation may be simply referred to as “original operation”). During cutting and cutting of the surface, the cutting dust is also collected (see, for example, Patent Document 1).

The above-mentioned patent document 1 is to vacuum-suck cutting dust and collect it in a tank. In this case, in order to separate (cut) dust into fluid (for example, air) and cutting powder when stored (collected) in the tank. As an example, it is conceivable to provide a filter in the fluid flow path and collect cutting dust (fine dust) with this filter.
However, in the method of separating cut dust by passing it through the filter, it is necessary to periodically remove the cutting dust adhering to the filter. To do this, the original work of cutting the pavement surface is interrupted. (See, for example, Patent Document 2).
Further, in Patent Document 2, it is disclosed that a cyclone is used instead of (or in combination with) such a filter. For example, when cutting dust adheres to the inner wall of the cyclone, After all, it is inevitable to interrupt the original work and remove the cutting dust.
For this reason, there has been a demand for a technique for removing cutting dust collected by a collecting element such as a filter without interrupting the original operation.

JP 2014-70427 A JP2012-2023 (especially [0054])

  The present invention has been made in view of such a background, and without interrupting the original work of cutting into the pavement surface, the cutting dust generated with the work is reduced in suction force. Development of a new cutting dust collecting device that can continue to be sucked and collected without any trouble and a pavement material cutting device to which the cutting dust collecting device is applied is a technical issue.

That is, the cutting dust collection device according to claim 1 is:
An apparatus that sucks and collects cutting dust generated on the pavement surface by causing one or a plurality of rotating cutter blades to act on the pavement surface to form a cutting groove,
In this device, the blade cover side covering the cutter blade is the suction receiving side, while the suction source side where the suction blower is provided is the suction source side,
In the suction path between the suction receiving side and the suction source side, two collection chambers equipped with collection elements are provided independently in parallel ,
In addition, the suction action to each collection chamber is switched by operating the rotary valve type switching body,
The collecting element is a rotary filter that blocks the passage of cut dust. This filter is a pleated cylindrical filter having a plurality of pleats on the outer peripheral side. The scraper piece is fixed and installed so that it makes elastic contact,
When the cutting dust is wiped off, this scraping piece is brought into contact with the rotating pleated cylindrical filter, and the cutting dust is wiped off by hitting each pleat.
In addition, the rotary valve type switching body and the rotating filter have a structure that is commonly driven from one drive source by one transmission body,
During the operation of forming the cutting groove on the pavement surface, the collection chamber that has stopped the suction operation while applying the suction operation to at least one of the collection chambers is cut collected in the collection chamber. The dust is removed from the collecting element, and the removed dust is collected.

Moreover, the pavement material cutting device according to claim 2 ,
A pavement material cutting device that includes a traveling device, a cutter device, and a drive source device of the cutter device in a main body body, and causes a cutter blade in the cutter device to act on the pavement surface to form a cutting groove on the pavement surface. ,
This apparatus comprises the cutting dust collecting apparatus according to the first aspect.

First, according to the present invention, while performing the original operation of forming a cutting groove on the pavement surface, the original operation is continued in order to remove the cutting dust adhering to the collection element in the collection chamber where the suction action is interrupted. However, it is possible to suck and collect the cutting dust generated with the work, and to maintain a high suction force during the work (a reduction in the suction force and no reduction in work efficiency is caused).
Moreover, according to this invention, the structure which dispels cutting dust from here and a collection element is made concrete. In other words, the collection element is a filter that blocks the passage of cutting dust, and in order to remove the cutting dust adhering to this filter, it is structured to wipe off the cutting dust by hitting the filter, so the original work is continued. At the same time, the cut dust can be reliably removed from the filter and collected.
Further, according to the present invention, since the collection chamber is composed of two rooms provided in parallel, for example, a structure such as a suction / non-suction switching structure to the two collection chambers is relatively simple. Yes (no need for complicated device structure).
In addition, according to the present invention, since the switching body for switching between suction and non-suction to the collection chamber is in the form of a general rotary valve, a highly reliable switching mechanism can be simply configured, and the suction action can be switched. Smooth and reliable.
Moreover, according to this invention, since the filter is a rotary type, the surface area which collects (captures) cutting dust can be used effectively, and more cutting dust can adhere.
Further, since the filter is of a rotating type, for example, a configuration in which the cut dust attached to the filter is struck and removed is relatively easy to take, and the cut dust can be efficiently removed from the filter. In other words, by providing the direction of hitting the filter in a fixed state, the entire circumference of the rotating filter can be hit.
Further, according to the present invention, since the scraping piece elastically contacting the pleat portion is provided in a fixed state with respect to the rotating pleated cylindrical filter, the pleating cylindrical filter is simply rotated without moving the scraping piece. The cutting dust can be efficiently removed from the entire circumference of the pleated cylindrical filter.
In addition, according to the present invention, the rotary valve type switching body and the rotating filter are commonly driven by a single transmission source from a single drive source, so that these timings can be accurately synchronized. it can. That is, in the present invention, it is necessary to ensure that any one of the collection chambers has a suction action, and it is necessary to avoid a situation in which the suction action does not work in all the collection chambers. Such timing adjustment is easy.

It is the perspective view (a) which shows the pavement material cutting device carrying the cutting dust collection apparatus of this invention skeleton, and the perspective view (b) which shows a cutting dust collection apparatus. It is a perspective view which shows the same pavement material cutting device same as the above from a skeleton. It is the front view (a) which shows a pavement material cutting device same as the above in a partial section state, and the perspective view (b) which shows the cutter device (cutter blade) circumference. It is a longitudinal cross-sectional view which expands and shows the IV section of Fig.3 (a). ~ Sectional view showing the rotational position of the suction switching hole in the switching body (the rotational position of the resin plate with respect to the suction source side communication hole) and the communication state to each collection chamber (corresponding to the VV line in FIG. 3A) ). It is sectional drawing (a) shown in the side view state of a pavement material cutting device, and sectional drawing (b) shown in the front view state of a pavement material cutting device. It is explanatory drawing which shows a mode that a rotary valve type switching main body and two pleated cylindrical filters are driven in common by one transmission body from one drive source. It is explanatory drawing which shows a mode that a cutting dust collection apparatus (apparatus main body) is raised with respect to a main body body.

  The mode for carrying out the present invention includes one described in the following embodiments, and further includes various methods that can be improved within the technical idea.

Hereinafter, the present invention will be specifically described based on illustrated embodiments.
First, a symbol M is a pavement material cutting device, which acts on the pavement surface P to form a cutting groove Ps. Although the name of the device is referred to as “cutting device”, a cutting groove or the like may be formed, and the cutting may not always be performed. However, since the device name is commonly used, the pavement material cutting device M is used. As an example of this, as shown in FIGS. 1 to 3 as an example, first, a traveling device 2 is provided directly on a main body 10 constituting the main body 1 that is responsible for a cutting action. Movement by push-pull is possible. The cutter device 3 is provided in the lower part of the main body 10 and the cutting dust collecting device 5 is mounted in the vicinity of the cutter device 3, here in the upper front part of the main body 10. Then, the cutting dust D generated when the cutter device 3 is applied to the pavement surface P to form the cutting groove Ps is efficiently collected and collected by the cutting dust collecting device 5.
1 to 3 (particularly FIG. 3) show the pavement material cutting apparatus M in which one cutter blade 30 is mounted on a cutter shaft (main shaft 32 described later). For example, when a plurality of grooves are formed at intervals (so-called grooving), a plurality of cutter blades 30 may be mounted at appropriate intervals on the same axis.

Hereinafter, the pavement material cutting device M will be further described.
First, the main body 10 is provided with a shroud cover 11 that covers an internal mechanism with respect to the chassis frame. Inside this, a prime mover (not shown), various devices of a drive system from the prime mover to the cutter device 3, or an operation transmission system are provided. Various devices are provided.
The gauge rod 12 is provided so as to extend forward in front of the main body 10. The gauge rod 12 is a roller (not shown) for smoothly moving the gauge piece 121 and the paved surface P at the tip. ). Here, the gauge piece 121 is a guide for aligning the cutter blade 30 with a cutting line preliminarily marked on the road surface. That is, since the cutter blade 30 is covered with a blade cover 52 described later, the position of the cutter blade 30 is not visible to the operator during actual cutting. For this reason, the gauge piece 121 is matched with the position of the cutter blade 30 in a plan view, and the cutter blade 30 is adjusted to the cutting line by matching the gauge piece 121 with the ruled cutting line.
Further, the main body 10 is provided with a forward operation handle 13 extending rearward thereof and an elevating operation handle 14.

Next, the traveling device 2 provided below the main body 10 will be described.
As the traveling device 2, a main wheel 21 is provided at the rear of the device. Hereinafter, in this embodiment, it is assumed that the operator pushes the pavement material cutting device M in a state where the advance operation handle 13 is steered, and the advancing direction is defined as the front. Moreover, let the horizontal direction seen from this operator be the width direction of the pavement material cutting device M and the cutting dust collection device 5 (device main body 51). The main wheel 21 may be free-rolling or may be driven in consideration of an operation load as appropriate.
Further, a sub wheel 22 is provided in front of the main wheel 21. The auxiliary wheel 22 is configured to be able to move up and down, and this is for setting the main body 10 at an appropriate angle, for example, from a forwardly raised state to a substantially horizontal state. Incidentally, when performing the operation | work which forms the cutting groove Ps in the pavement surface P, the lower surface of the main body 10 is normally set to a substantially horizontal state.

Next, the cutter device 3 will be described.
As an example, as shown in FIG. 3A, the cutter device 3 includes a cutter blade 30 as a main member, which is attached to a main shaft 32 supported by a bearing 31 attached to the lower surface of the main body 10. It is attached. That is, the rotation of the main shaft 32 is transmitted to the pulley 33 from a prime mover (not shown) to drive the main shaft 32, and the cutter blade 30 is rotated accordingly.
In addition, as shown in FIG. 3B, for example, the fixing structure of the main shaft 32 and the cutter blade 30 is such that the cutter blade 30 is sandwiched between pressing bosses 35 and fixed by tightening a lock nut 36. The holding boss 35 includes a mechanism for cooling the cutter boss 30 as the cutter blade 30 rotates.
In addition, about the detail of the other structure regarding the apparatus main body 1, such as the traveling apparatus 2 and the cutter apparatus 3, Unexamined-Japanese-Patent No. 2012-2023 (patent No. 5667385) which the present applicant has already acquired a patent is used.

As shown in FIG. 1B as an example, the cutter blade 30 has a structure in which the blade cover 52 covers the portion other than the lower surface serving as the action portion, and thereby the original operation for forming the cutting groove Ps. It is considered that the generated cutting dust D is not scattered around. For this reason, below the blade cover 52, a lower skirt 521 is provided on almost the entire circumference so as to close the gap with the pavement surface P.
The cutting dust D generated in the blade cover 52 is collected while vacuum suction is performed by the cutting dust collecting device 5 according to the present invention. A suction duct 522 serving as a suction path for a large amount of dust-mixed air A0) is erected from the blade cover 52.
In this configuration, the blade cover 52 is also considered as one component of the cutter device 3, but in this specification, the blade cover 52 is confined so that the cutting dust D to be collected is not scattered. In that sense, the blade cover 52 is included as a constituent member of the cutting dust collecting device 5.

Next, the cutting dust collection device 5 which is a major feature of the present invention will be described.
The cutting dust collecting device 5 vacuums the cutting dust D (dust-mixed air A0) discharged from the blade cover 52 where the cutter blade 30 is covered with the original operation of forming the cutting groove Ps on the pavement surface P. The cutting dust D is collected (captured) when sucked and passed through the collection element 50.
For this reason, as shown in FIG. 1B, for example, the cutting dust collecting device 5 includes an apparatus main body (housing) 51 that accommodates the collecting element 50 as a main component, and a suction duct of the blade cover 52. 522 to the apparatus main body 51 are connected by a suction receiving side suction hose H1, and the apparatus main body 51 to the suction blower 53 are connected by a suction source side suction hose H2.
Note that the suction receiving side suction hose H1 and the suction source side suction hose H2 are preferably formed in a flexible shape so that they can be bent appropriately.

Thus, in this specification, in the suction path for sucking the cutting dust D (dust-mixed air A0), the suction source side where the suction blower 53 is installed is referred to as the “suction source side”, and the generation source of the cutting dust D, that is, the blade cover The 52 side is referred to as a “suction receiving side”.
In the present invention, a plurality of collection chambers 54 (in the present invention , two are provided as the collection chambers 54A and 54B) provided with the collection element 50 are independently provided in the suction path. The suction / non-suction is switched for a plurality of collection chambers 54 (this switching mechanism is referred to as a suction switching mechanism 55).

Here, the collection elements 50A and 50B provided in the collection chambers 54A and 54B will be described.
The collecting chambers 54A and 54B are provided with pleated cylindrical filters (same as “50” as the collecting element) as the collecting elements 50A and 50B, respectively, where the cutting dust D is collected. The pleated cylindrical filters 50A and 50B incorporated in the collection chambers 54A and 54B are arranged so as to be arranged almost horizontally along the front-rear direction of the pavement material cutting apparatus M.
The dust removal air A1 after the cutting dust D is removed by the pleated cylindrical filters 50A and 50B is sucked into the suction source side and discharged to the outside from the exhaust port of the suction blower 53.
The cutting dust D (dust-mixed air A0) generated in the blade cover 52 in this way passes through at least one of the collection chambers 54 while being vacuum sucked from the suction receiving side to the suction source side. In addition, the cutting dust D is removed by the collecting element 50.

  In addition, the pleated cylindrical filter 50 is a filter in which a pleat portion 501 formed so that a large number of folds are regularly and alternately folded is provided on almost the entire surface of the outer periphery of the cylinder. While rotating the pleated cylindrical filter 50, the cut dust D is collected by the pleat portion 501 on the outer peripheral side of the cylinder by passing the cut dust D (dust-mixed air A0) from the outer peripheral side of the pleated portion 501 to the inside of the cylinder. Is. That is, the dust-mixed air A0 passes through the pleated cylindrical filter 50 from the outer pleat portion 501 to the inside inside, and at this time, the cut dust D adheres exclusively to the outer peripheral side of the pleat portion 501 and is captured. . For this reason, the outer peripheral side of the pleat portion 501 may be referred to as a catch surface (catch side), and the inner side (inside the cylinder) may be referred to as an anti-catch surface (anti-catch side).

Incidentally, the dust removing air A1 that has passed through the inside of the cylinder from the outer peripheral side of the pleated portion 501 is sucked in the inside of the pleated cylindrical filter 50 along the axial direction, and is sucked from an opening 502 formed on one end face. It is sucked into the side (suction switching chamber 55R described later).
Further, in this embodiment, as the opening 502 formed on the end face of each pleated cylindrical filter 50, two substantially semicircular openings are formed as a pair, but the opening 502 is substantially 1/4. It is also possible to form a circular opening as a set of four.
The other end face of the pleated cylindrical filter 50 (end face where the opening 502 is not formed) is installed in a closed state in the collection chamber 54, and air does not flow out from this side.

  Further, it is preferable that the dust-mixed air A0 taken into the apparatus main body 51 via the suction receiving side suction hose H1 is further sucked uniformly from here to the outer periphery of the pleated cylindrical filter 50 in the collection chamber 54. For this reason, in this embodiment, the introduction portion 56 into which the dust-mixed air A0 is taken in the apparatus main body 51 is formed over almost the entire width direction of the apparatus main body 51 as shown in FIG.

Furthermore, as shown in FIG. 8A as an example, a wall is provided inside the apparatus main body 51 so as to separate the two collection chambers 54A and 54B. Here, reference numeral 57 in the figure is a pair of hanging walls provided below the introduction portion 56, and is formed so that the introduction portion 56 and each of the pleated cylindrical filters 50 </ b> A and 50 </ b> B are separated by the hanging wall 57. Is done. In addition, a space formed between the pair of hanging walls 57 ensures a suction flow from the introduction portion 56 toward the pleated cylindrical filters 50A and 50B (outer peripheral portions).
For example, on the collection chamber 54A side, the drooping wall 57 is located above the pleated cylindrical filter 50A together with the upper surface and side surfaces (side walls facing the drooping wall 57) of the apparatus main body 51 that accommodates the pleated cylindrical filter 50A. It is configured to surround (cover) and is formed so that the lower part of the pleated cylindrical filter 50A is opened. Moreover, the drooping wall 57 is provided over almost all of the width direction of the apparatus main body 51 along the axial direction of the pleated cylindrical filter 50. With such a configuration, the suction flow passing through the introduction portion 56 is configured to uniformly act on almost all axial directions of the pleated cylindrical filters 50A and 50B.

  Reference numeral 58 in the figure is a standing wall standing from below the boundary between the two collection chambers 54A and 54B, and this standing wall 58 is formed so as to rise substantially in the middle of the pair of hanging walls 57. The Further, the standing wall 58 is also provided along almost the entire width direction of the apparatus main body 51 along the axial direction of the pleated cylindrical filter 50.

  The lower end position of the drooping wall 57 and the upper end position of the standing wall 58 are formed so that the height positions thereof are substantially the same height (position). The two collecting chambers 54A and 54B are substantially affected by the suction action acting on the other collecting chambers 54 by the hanging wall 57 and the standing wall 58 (including a suction switching chamber 55R described later). It is formed so as not to fit. That is, the drooping wall 57 and the standing wall 58 are formed slightly apart as shown in the figure, and the suction flow acts on the collection chambers 54A and 54B by this gap, but on the other hand, this gap is formed. By doing so, it is conceivable that the suction action of the two collection chambers 54A and 54B matches somewhat. However, it suffices if substantial collection can be performed in one of the collection chambers 54 in which the suction action is interrupted, and the description of “independent” described in the claims includes such a state. Specifically, for example, when the suction action works only in the collection chamber 54A and the positive suction action does not work in the collection chamber 54B, the suction action of the collection chamber 54A is slightly in the collection chamber 54B. Even if it is in a situation where there is a situation in which the cutting dust D can be substantially removed in the collection chamber 54B, there is no particular problem, and this situation is referred to as “independent”. Of course, the drooping dimension of the drooping wall 57, the rising dimension of the standing wall 58, the gap between both members, and the like are set in consideration of the above.

Further, as shown in FIG. 1B as an example, the apparatus main body 51 has a duct-like suction switching chamber 55R provided with a suction switching mechanism 55 on the end surface side where the opening 502 is formed. It is provided (connected) to stand up. Hereinafter, the suction switching mechanism 55 will be described together with the suction switching chamber 55R.
In the suction switching chamber 55R, on the wall surface on the collection chamber 54 side, there is formed an opening portion that is always in communication with the opening portion 502 of the pleated cylindrical filter 50 (also denoted by the same reference numeral “502” as the opening portion). . That is, in the suction switching chamber 55R, openings 502A and 502B communicating with the collection chambers 54A and 54B are formed on the wall surface on the collection chamber 54 side.
A partition wall 59 is provided in the suction switching chamber 55R in the vertical direction so as to partition the openings 502A and 502B (that is, so as to partition the collection chambers 54A and 54B). The two collection chambers 54A and 54B are kept out of communication.

Further, suction source side communication holes 60h for communicating the respective collection chambers 54A and 54B with the suction source side are respectively provided on the upper wall surface (here, the upper wall surface on the collection chamber 54 side) constituting the suction switching chamber 55R. Opened. Of course, these two suction source side communication holes 60h are also configured not to communicate with each other by the partition wall 59.
In this embodiment, a substantially semicircular hole is opened as the suction source side communication hole 60h, but this shape can be changed as appropriate. The suction source side communication hole 60h is formed in a fixed state with respect to the suction switching chamber 55R and does not rotate (does not move).
In addition, in order to switch suction / non-suction exerted on the collection chambers 54A and 54B by sliding and rotating a disc-shaped switching body 61 described later with respect to the suction source side communication hole 60h, Actually, the suction source side communication hole 60h is not formed simply by opening in the wall surface of the suction switching chamber 55R, but as an example, as shown in FIG. 4, for example, substantially the same hole as the suction source side communication hole 60h is formed. In addition to opening on the wall surface, a suction-source-side communication hole 60h is opened in a disk-shaped resin plate 60 excellent in wear resistance, self-lubrication, etc., and the resin plate 60 is sucked through a resin packing 60p. This is fixed to the wall surface (opening) of the switching chamber 55R.

The suction switching hole 61h (here, a fan-shaped central angle of about 120 degrees) is formed with respect to the resin plate 60 (fixed to the wall opening of the suction switching chamber 55R) in which the suction source side communication hole 60h is formed. A disc-shaped switching body 61 having a hole formed therein is provided to be slidably rotatable. The switching body 61 takes the form of a so-called rotary valve that rotates (sliding and rotating) while contacting the end surface with respect to the resin plate 60. Therefore, the switching body 61 also has wear resistance and self-lubricating properties. Excellent resin plate is applied.
In the present embodiment, the suction switching hole 61h is formed smaller than the suction source side communication hole 60h.

Further, the switching body 61 is provided with a switching body cover 62 so as to be sealed from the outside (outside of the suction source side), and a cylindrical outlet duct 63 is formed therein, and this duct is provided in the duct. One end of the suction source side suction hose H2 is connected.
In this embodiment, three lead-out ducts 63 are formed, and two of them are connected to the suction source side suction hose H2. The number of connections depends on the magnitude of the suction force acting on the collection chamber 54 and the cutting. It can be appropriately changed depending on the properties of the dust D and the like. Incidentally, the outlet duct 63 to which the suction source side suction hose H2 is not connected is naturally closed with an appropriate member.

Hereinafter, an operation state in which the suction switching mechanism 55 switches between suction and non-suction of the collection chambers 54A and 54B will be described.
When switching the suction action on each of the collection chambers 54A and 54B, the switching body 61 that functions as a rotary valve is slid and rotated with respect to the resin plate 60 in which the suction source side communication hole 60h is formed. When the suction switching hole 61h of the switching body 61 overlaps with the suction source side communication hole 60h connected to the collection chambers 54A and 54B, the suction path passing through the collection chamber 54 is connected, and the collection A suction action is applied to the chamber 54.
In other words, when the suction switching hole 61h of the switching body 61 does not overlap with the suction source side communication hole 60h of the resin plate 60, the collection chamber 54 is blocked in a state where the suction path passing therethrough is blocked. (Closed state), and the corresponding collection chamber 54 does not reach (cannot reach) the suction action.

That is, in this embodiment, as described above, the suction switching hole 61h of the switching body 61 is formed smaller than the suction source side communication hole 60h communicating with each collection chamber 54, for example, as shown in FIGS. Thus, in addition to the case where the suction action is applied to one of the collection chambers 54, the suction action may be applied to both the collection chambers 54A and 54B as shown in FIG.
However, since the switching main body 61 is rotating, there is always a case where it is not in communication (non-suction) with any of the collection chambers 54. At this time, in the collection chamber 54, the collection element (pleated cylindrical filter) The cutting dust D adhering to 50 is effectively wiped off (struck down). Even if the pleated cylindrical filter 50 is struck and the cutting dust D is to be wiped off while the suction action is applied to the collection chamber 54, the cutting dust D detached from the pleated cylindrical filter 50 is recovered again by the suction action. It adheres to the pleated cylindrical filter 50 and is difficult to wipe off. For this reason, in the present invention, a situation where the suction action does not reach is intentionally generated, and the cutting dust D is effectively wiped off during that time. Of course, also in the present embodiment, there is a situation in which the pleated cylindrical filter 50 is hit with the suction action acting on the collection chamber 54, and at this time, it is expected that finely cut cutting dust D will be removed. Not done.

On the other hand, the action of sucking the cut dust D (dust-mixed air A0) from the blade cover 52 is because at least one of the collection chambers 54 has a suction action (a suction path from the suction receiving side to the suction source side). Therefore, the suction action (dust collection action) can be continued from start to finish.
Therefore, during the original operation of forming the cutting groove Ps on the pavement surface P, the cutting dust D can be intermittently removed from the pleated cylindrical filter 50 without interrupting the operation, and the pleated cylindrical type The clogging of the filter 50 can be effectively prevented. For this reason, during the original work, the dust collection ability (suction force) can be maintained, and the original work can be performed efficiently. In other words, during the original operation, it is possible to prevent the dust collection ability from being lowered due to clogging of the pleated cylindrical filter 50, and to reliably collect the cut dust D.

Incidentally, if it is a vacuum cleaner, a plurality of filters are provided, and during operation (that is, during cleaning), for example, each filter temporarily generates a flow in the opposite direction to the suction flow, and the filter is clogged. It has been devised to prevent the problems sequentially (for example, Japanese Patent Application Laid-Open No. 2009-225993: Japanese Patent No. 5270940). However, this Japanese Patent Application Laid-Open No. 2009-225993 is only a vacuum cleaner, and has a technical idea of a flow in a direction opposite to the suction flow (so-called backwashing), and a suction action acting on the filter (collecting chamber) of the present application. Is significantly different from the technical idea of temporarily interrupting (blocking).
Further, since there is such a great difference in technical idea, Japanese Patent Application Laid-Open No. 2009-225993 can hardly assume that the dust adhering to the filter is knocked down or removed.

In the present invention , the above-described two pleated cylindrical filters 50A and 50B and the switching body 61 as a rotary valve are, for example, as shown in FIG. 9, from the same drive source (here, motor m) to one transmission body ( Here, the chain 64) is used for rotation. Specifically, a sprocket 65 attached to the shaft portion of the pleated cylindrical filter 50A, a sprocket 66 attached to the shaft portion of the pleated cylindrical filter 50B, a sprocket 67 attached to the shaft portion of the switching body 61, One chain 64 is wound around a sprocket 68 attached to the shaft portion of the motor m. Then, the motor m is driven to rotate (co-rotate) these two pleated cylindrical filters 50A and 50B and the switching body 61 all at once. Reference numeral 69 in the drawing is a tension sprocket for applying an appropriate tension to the chain 64.

Incidentally, for example, the number of teeth of the sprockets 65 and 66 of the pleated cylindrical filters 50A and 50B is 26, the number of teeth of the sprocket 67 of the switching body 61 is 65, the number of teeth of the sprocket 68 of the motor m is 12, and the number of teeth of the sprocket 69 for tension is When the number of teeth is 26 and the switching body 61 is rotated once in about 30 seconds, the pleated cylindrical filters 50A and 50B are set to rotate once in about 15 seconds.
Of course, pulleys and V-belts can be applied instead of sprockets and chains, and for this reason, in the scope of claims, the term “transmission body” includes chains and V-belts. It is.
The rotational driving of the two pleated cylindrical filters 50A and 50B and the switching body 61 can be driven not by taking out from the motor m but separately by taking out output from the engine that rotates the cutter blade 30.

As described above, the dust removal air A1 after the cutting dust D is removed is sucked into the suction blower 53 from the lead-out duct 63 via the suction source side hose H2. It is collected in the collection chamber 54 (then stored in a storage space 81 formed below the apparatus main body 51).
At this time, in the state where the suction action is interrupted as described above, the cutting dust D is effectively discharged by hitting the pleated portion 501 (catch side) of the pleated cylindrical filter 50 to which the cutting dust D is adhered from the outside. The dropping mechanism 70 for this purpose will be described below.

  For example, as shown in FIG. 8A, three dropout mechanisms 70 are provided for one pleated cylindrical filter 50. Further, as shown in the figure, the wiping-off mechanism 70 is provided so as to elastically contact the lower part of the outer peripheral surface (the lower part of the catch surface) of the pleated cylindrical filter 50. Here, the pleat part 501 is struck to the catch surface. The attached cutting dust D is removed.

Hereinafter, the configuration of the single payout mechanism 70 will be further described.
As shown in FIG. 8B and FIG. 1B as an example, the pay-off mechanism 70 has three pay-off pieces 72 as an example on the shaft portion 71 along the axial direction of the pleated cylindrical filter 50. Installed at regular intervals.
The scraping piece 72 has a rectangular plate shape as an example, and is provided so that one end side thereof is fixed to the shaft portion 71 and the other end side facing this is in contact (elastic contact) with the pleat portion 501. It is configured to hit (or play) each pleat (fold) at the contact portion.
In addition, an elastic body attaching piece 73 is attached to one end side of the shaft portion 71 to which such a scraping piece 72 is attached, and the elastic body attaching piece 74 protrudes from the outer end surface of the apparatus main body 51. An elastic body 75 such as a spring is provided between them. As a result, an urging force is always applied to the shaft portion 71 so that the scraping piece 72 is in contact (elastic contact) with the pleat portion 501. That is, the elastic body 75 applies an urging force (torsional urging force) to the shaft portion 71 so that the wiping piece 72 is always returned to the pleat portion 501. ) (Or play).

Hereinafter, the situation where the cutting dust D is wiped off by such a scraping piece 72 will be described.
The operation of removing the cutting dust D from the pleated portion 501 (catch surface) of the pleated cylindrical filter 50 is performed while performing the original operation of forming the cutting groove Ps on the pavement surface P. Therefore, the cutting dust D The operation of wiping off is performed while the pleated cylindrical filter 50 is always rotating (spinning).
As the pleated cylindrical filter 50 rotates, the position of the pleat portion 501 with which the scraping piece 72 abuts also moves in the circumferential direction, and the urging force is applied (the elastic body via the shaft portion 71). The wipe-off piece 72 to which the urging force from 75 is indirectly applied) always comes into elastic contact with the pleated portion 501. When this elastic contact is seen for each of the pleats (pleats), when the stripped piece 72 that is in contact with one pleat cannot contact the pleat as the pleated cylindrical filter 50 rotates ( When the abutting limit is reached, the urging force comes into contact with the subsequent pleat. At this time, the urging toward the pleating portion 501 acts to strike (pull) the subsequent pleat. Due to this action, the cutting dust D adhering to the pleated part 501 is separated from the pleated part 501, and since the suction action is not working, it falls as it is. In addition, since the slashing action by the scraping piece 72 is continuously performed at the outer peripheral position where the scraping piece 72 is provided, it is attached to the pleat portion 501 (catch surface) on the entire outer peripheral surface. The cutting dust D is removed.

In this way, the position where the single piece 72 has an action of hitting the pleated cylindrical filter 50 is always on the same outer circumference. For this reason, with respect to one payout mechanism 70 (shaft portion 71), by providing a plurality (three in this case) of payout pieces 72, it is possible to obtain a wide dropout surface in one payout mechanism 70. I have to. Further, by providing a plurality (three in this case) of such wiping mechanisms 70 for one pleated cylindrical filter 50, almost all of the outer peripheral surface of the pleated cylindrical filter 50 is hit evenly (in the axial direction). When viewed), the cutting dust D is efficiently removed. For this reason, in this embodiment, a total of nine pieces of dropping pieces 72 act on one pleated cylindrical filter 50.
Further, in this embodiment, the three dropout pieces 72 provided in one dropout mechanism 70 (shaft portion 71) are installed with an interval between about two dropout pieces 72. . Incidentally, in FIG. 8, this situation is indicated by trailing symbols “a”, “b”, and “c” attached to the pay-off piece 72 and the pay-off mechanism 70.

Next, the structure which accommodates the cutting dust D wiped off from the pleated cylindrical filter 50 in the apparatus main body 51 is demonstrated.
First, as shown in FIG. 8A as an example, an accommodation space 81 for temporarily storing cutting dust D removed from the pleated cylindrical filter 50 is formed below the collection chamber 54 in the apparatus main body 51. Is done. Here, in the present embodiment, the accommodation space 81 is formed in a bifurcated shape that narrows downward corresponding to the two pleated cylindrical filters 50A and 50B, and can be opened and closed at the lower discharge port 82 of each accommodation space 81. Each of the shutters 83 is provided. In addition, a storage bag 84 is previously attached to the lower discharge port 82. For this reason, for example, a flange 82f for easily mounting the storage bag 84 is formed on the outer periphery of the lower discharge port 82. Preferably, the open end edge of the storage bag 84 is partially or entirely fastened with a clip, a band, or the like using the flange 82f. In order to take out the cut dust D stored in the storage space 81 to the outside of the apparatus, the shutter 83 is opened to drop the cut dust D into the storage bag 84 and fill the storage bag 84 outside the apparatus. To be taken out. Incidentally, a reference numeral 83L in FIG. 1A is a manual lever for opening and closing the shutter 83.

  Moreover, although the apparatus main body 51 of the cutting dust collection apparatus 5 is mounted on the front upper part of the main body 10 as described above, the apparatus main body 51 is placed on the main body 10 as shown in FIG. Attached freely (turnable). That is, the apparatus main body 51 is first connected to the main body 10 by the rotatable lever 85. Here, reference numeral 85 a in the figure is a rotation shaft of the lever 85. An air cylinder (or hydraulic cylinder) 86 is provided between the main body 10 and the lever 85. By extending the slider of the air cylinder 86, the apparatus main body 51 is lifted forward from a substantially horizontal posture. It is made to rise in a shape. In this embodiment, since the apparatus main body 51 is entirely lifted, a roller 87 is provided at the lower rear part of the apparatus main body 51, and this roller 87 is always in contact with the vertical frame of the main body body 10 ( It may be positively locked) and is configured to change posture. As a result, the lifting (lowering) operation of the apparatus main body 51 can be performed stably.

When the apparatus main body 51 is in a substantially horizontal posture, the lower discharge port 82 is in close contact with the main body 10, and no gap is formed between the lower discharge port 82 and the main body 10. It has a configuration. Incidentally, this posture is a posture when performing the original work of forming the cutting groove Ps on the pavement surface P.
On the other hand, when the apparatus main body 51 is lifted with respect to the main body 10 and the apparatus main body 51 is entirely inclined upward, the lower discharge port 82 is separated from the main body 10 and is A gap is formed between the discharge port 82 and the main body 10. In this posture, the shutter 83 is opened to drop and throw the cut dust D stored in the storage space 81 into the storage bag 84.

During the original operation of forming the cutting groove Ps on the pavement surface P, the storage bag 84 attached to the lower discharge port 82 is crushed by being sandwiched between the lower discharge port 82 and the main body 10 that are in close contact with each other. However, if the apparatus main body 51 is lifted and the shutter 83 is opened, the storage bag 84 naturally expands due to the cutting dust D falling into the storage bag 84 ( Swell).
Incidentally, when the apparatus main body 51 is lifted with respect to the main body 10, if the top plate of the main body 10 is also opened at the same time, cooling of the engine mounted (stored) in the main body 10 is promoted. It is a desirable form.

  In the above description, the suction duct 522 provided in the blade cover 52, the suction state of the cutting dust D in the blade cover 52, and the like are not described in detail, but this may be performed in accordance with the actual work for forming the cutting groove Ps. This is because the method can be adopted. For example, in the case of a cutting method (so-called down-cut method) in which the action direction of the cutter blade 30 acts from the top to the bottom of the pavement surface P, a lot of cutting dust D is scattered on the rear side of the cutter blade 30. As shown in FIG. 1B, it is preferable to raise a suction duct 522 at the upper rear part in the blade cover 52 and connect the suction receiving side suction hose H1 thereto.

Further, when the original operation of forming the cutting groove Ps on the pavement surface P is advanced, a large amount of cutting dust D enters the cutting groove Ps that has already been formed (the cutting groove Ps formed on the rear side of the cutter blade 30) and remains. In this case, the original operation can be performed while the closing plate is fitted in the cutting groove Ps, and as a result, the cutting dust D can be cleanly sucked without leaving the cutting groove Ps as much as possible. . Of course, in that case, for example, the lower opening of the suction duct is preferably formed in a vertically long shape along the cutting groove Ps once formed.
As described above, as to the suction state in the blade cover 52, an appropriate method can be adopted in accordance with the actual work.
In the above description, the working mode in a dry environment (so-called dry type) has been described as a basis. However, depending on the properties of the cut dust D to be discharged, the cut dust D may contain some moisture and be cut. Such a case is also included in the present invention. Incidentally, as a method of adding some moisture to the cutting dust D, for example, it is conceivable to spray a small amount of water on the cutting dust D in the form of a mist.

The cutting dust collecting device 5 and the pavement material cutting device M of the present invention have the basic structure described above, and the operation mode of actual work to which this is applied will be described below. In the following description, suction and accommodation of the cutting dust D will be mainly described (the original work for forming the cutting groove Ps will be schematically described).
(1) Preparatory work First, at the work site, a cutting line for guidance for forming the cutting groove Ps is usually marked (attached) on the construction surface (paved surface P) in advance.
On the other hand, as the preparatory work on the apparatus side, the cutter blade 30 is mounted on the pavement material cutting device M, and this is normally transported by the pavement material cutting device M to the site without mounting the cutter blade 30. Because.
In addition, the housing bag 84 is mounted on the apparatus main body 51 of the pavement material cutting apparatus M, and the apparatus main body 51 is lifted with respect to the main body 10 and is interposed between the main body 10 and the lower discharge port 82. A space is formed, and the opening edge of the storage bag 84 is attached to the lower discharge port 82 using this space. Of course, after mounting the storage bag 84, the apparatus body 51 in the upright state is returned to a substantially horizontal state, and the shutter 83 of the lower discharge port 82 remains closed at this time.
Note that, when the apparatus main body 51 is returned to a substantially horizontal state, the lower discharge port 82 and the main body 10 are in close contact with each other, so that the storage bag 84 attached to the lower discharge port 82 is also sandwiched and crushed.

(2) Start of cutting work When starting the cutting work, all the drive sources are activated. That is, the cutter blade 30 is driven by starting the engine, and the suction blower 53 is started. Furthermore, the motor m is driven, the two pleated cylindrical filters 50A and 50B are rotationally driven, and the switching body 61 as a rotary valve is also rotationally driven.
On the other hand, for the pavement material cutting device M installed at the work site, the gauge rod 12 is laid down forward, and the gauge piece 121 is aligned with the guide cutting line to prepare.
Thereafter, the cutting groove Ps is formed on the pavement surface P by the rotating cutter blade 30 while appropriately operating the lifting operation handle 14 and the advance operation handle 13 (the original operation is performed).

(3) Generation of cutting dust Along with the original operation of forming the cutting groove Ps on the pavement surface P, a large amount of cutting dust D is generated in the blade cover 52, and dust-containing air containing such cutting dust D is generated. A0 is sucked by the cutting dust collecting device 5.

(4) Flow of dust mixed air (dust removal air) That is, the dust mixed air A0 is introduced into the blade cover 52 → the suction duct 522 → the suction receiving side suction hose H1 → the apparatus main body 51 as shown in FIGS. From the part 56 to the collection chamber 54, it passes through the pleat part 501 of the pleated cylindrical filters 50A and 50B installed therein from the outer periphery side (inhales).
Further, when the dust-mixed air A0 passes through the pleat portion 501 of the pleated cylindrical filter 50, the cut dust D is removed to become dust removal air A1, and then the inside of the pleated cylindrical filter 50 → the opening 502 → suction. Switching chamber 55R → suction source side communication hole 60h of resin plate 60 → suction switching hole 61h of switching body 61 as a rotary valve → leading duct 63 → suction source side suction hose H2 → sucking into suction blower 53 (flow) Go).

(5) Switching action of suction / non-suction by the switching body In the apparatus body 51, the switching body 61 as a rotary valve always slides and rotates with respect to the resin plate 60 during operation (during the original operation), for example, As shown in FIGS. 5 and 6, when the suction switching hole 61h of the switching body 61 overlaps the suction source side communication hole 60h of the resin plate 60, the collection chamber communicated with the suction source side communication hole 60h. 54 has a suction action (the suction action does not work when the two holes do not overlap).
In the present invention, the suction switching mechanism 55 is controlled so that the suction action is surely applied to any one of the collection chambers 54 during the original operation of forming the cutting groove Ps on the pavement surface P. Therefore, when the suction switching mechanism 55, that is, the way in which the two holes overlap with each other, the suction action is applied only to the collection chamber 54A (for example, FIG. 5), or the suction action is applied only to the collection chamber 54B (for example, FIG. 6). There is a case (for example, FIG. 7) where the suction action is applied to both the collecting chambers 54A and 54B.
Further, while the suction action is acting on the collection chamber 54A, a time zone in which the suction action does not reach the collection chamber 54B is formed (for example, FIG. 5), and the cut dust collected by the pleated cylindrical filter 50B in the meantime. D is paid off and collected. On the other hand, while the suction action is acting on the collection chamber 54B, a time zone in which the suction action does not reach the collection chamber 54A is formed (for example, FIG. 6), and the cut dust collected by the pleated cylindrical filter 50A in the meantime. D is paid off and collected.
For this reason, as described above, the two collection chambers 54 </ b> A and 54 </ b> B are independently formed so that the suction action of one collection chamber 54 does not substantially reach the other collection chamber 54.

(6) Discharge of cutting dust from the filter The operation of removing the cutting dust D from the pleated cylindrical filter 50 is performed together with the original operation of forming the cutting groove Ps on the pavement surface P as described above. In other words, the operation for removing the cutting dust D is performed by the above-described removal mechanism 70 while rotating the pleated cylindrical filter 50. Incidentally, in this embodiment, the operation in which the scraping piece 72 strikes each pleat is always performed during the original work, but when the corresponding collection chamber 54 becomes non-suction as described above, it is cut. The dust D is effectively removed.
Then, as shown in FIG. 8, the cut dust D removed from the pleated cylindrical filter 50 falls in the accommodation space 81 where the shutter 83 is closed, and is temporarily stored therein.
During this operation, in addition to the shutter 83 being closed, the storage bag 84 is attached to the lower discharge port 82, so that the cut dust D is discharged from the storage space 81 (lower discharge port 82) to the outside. It will never be done.
As an example, the cutting dust D stored in the storage space 81 is almost full in the storage space 81 when the cutting groove Ps is formed with a length of about 15 m. Therefore, the storage bag 84 can be replaced using this length as a guide. Done.

(7) Removal of cut dust (replacement of storage bag)
When the cutting dust D collected in the storage space 81 is taken out (or when the storage bag 84 is replaced), all the driving sources of the pavement material cutting device M are first stopped. That is, the engine is stopped to stop the rotation of the cutter blade 30, and the suction blower 53 is also stopped. Further, the motor m is also stopped, and the rotation of the two pleated cylindrical filters 50A and 50B and the rotation of the switching body 61 as a rotary valve are also stopped.
Thereafter, as shown in FIG. 10, the apparatus main body 51 is entirely lifted with respect to the main body 10, and a space is formed between the lower discharge port 82 of the apparatus main body 51 and the main body 10. A space in which the accommodation bag 84 that has been crushed by this space is freely expanded (inflated) is secured. When the shutter 83 is opened in this state, the cut dust D stored in the storage space 81 falls into the storage bag 84 and is thrown in.
Thereafter, the storage bag 84 containing the cut dust D is removed from the lower discharge port 82 of the apparatus main body 51 and collected separately. A new storage bag 84 is mounted on the lower discharge port 82 of the apparatus main body 51, and the original operation of forming the cutting groove Ps on the pavement surface P is resumed.
Thus, when the cut dust D is taken out from the apparatus main body 51 (when the storage bag 84 is replaced), the original work is interrupted. However, while the original work is being performed, the collecting element (pleats) Since clogging of the cylindrical filter 50) is prevented, the suction force is not reduced and the original work can be performed efficiently.

[Other Examples]
The present invention has the above-described embodiment as one basic technical idea, but the following modifications can be considered.
For example, capturing current element it is also possible to use a cyclone to filter as 50, in which case, for example a cyclone, the upstream side of the suction effect, i.e. suction receivingside suction hose is preceding pleated cylindrical filter 50 It is possible to adopt a technique of providing dust in the middle of H1, that is, collecting dust in a two-stage structure.

M Pavement material cutting device P Pavement surface Ps Cutting groove D Cutting dust A0 Dust mixed air A1 Dust removal air m Motor H1 Suction receiving side suction hose H2 Suction source side suction hose

M Pavement material cutting device 1 Main body device 10 Main body body 2 Traveling device (wheel device)
3 Cutter device 5 Cutting dust collecting device

DESCRIPTION OF SYMBOLS 10 Main body body 11 Shroud cover 12 Gauge rod 121 Gauge piece 13 Progression operation handle 14 Lifting operation handle

2 Traveling device (wheel device)
21 main wheel 22 auxiliary wheel

3 Cutter device 30 Cutter blade 31 Bearing 32 Spindle 33 Pulley 35 Holding boss 36 Lock nut

5 Cutting dust collection device 50 Collection element (pleated cylindrical filter)
501 Pleated part (please part)
502 Opening 51 Device body (housing)
52 Blade cover 521 Lower skirt 522 Suction duct 53 Suction blower 54 Collection chamber 54A Collection chamber 54B Collection chamber

55 Suction switching mechanism 55R Suction switching chamber 56 Introducing section 57 Drip wall 58 Standing wall 59 Partition wall 60 Resin plate 60h Suction source side communication hole 60p Resin packing 61 Switching body 61h Suction switching hole 62 Switching body cover 63 Deriving duct

64 chain
65 Sprocket (Pleated cylindrical filter 50A)
66 Sprocket (Pleated Cylindrical Filter 50B)
67 Sprocket (Switching body 61)
68 Sprocket (Motor m)
69 Sprocket (for tension)

70 Discharge mechanism 71 Shaft portion 72 Discharge piece 73 Elastic body mounting piece 74 Elastic body mounting piece 75 Elastic body

81 Storage Space 82 Lower Discharge Port 82f Flange 83 Shutter 83L Manual Lever 84 Storage Bag

85 Lever 85a Rotating shaft 86 Air cylinder (or hydraulic cylinder)
87 Laura

Claims (2)

An apparatus that sucks and collects cutting dust generated on the pavement surface by causing one or a plurality of rotating cutter blades to act on the pavement surface to form a cutting groove,
In this device, the blade cover side covering the cutter blade is the suction receiving side, while the suction source side where the suction blower is provided is the suction source side,
In the suction path between the suction receiving side and the suction source side, two collection chambers equipped with collection elements are provided independently in parallel ,
In addition, the suction action to each collection chamber is switched by operating the rotary valve type switching body,
The collecting element is a rotary filter that blocks the passage of cut dust. This filter is a pleated cylindrical filter having a plurality of pleats on the outer peripheral side. The scraper piece is fixed and installed so that it makes elastic contact,
When the cutting dust is wiped off, this scraping piece is brought into contact with the rotating pleated cylindrical filter, and the cutting dust is wiped off by hitting each pleat.
In addition, the rotary valve type switching body and the rotating filter have a structure that is commonly driven from one drive source by one transmission body,
During the operation of forming the cutting groove on the pavement surface, the collection chamber that has stopped the suction operation while applying the suction operation to at least one of the collection chambers is cut collected in the collection chamber. A cutting dust collecting device in a pavement material cutting device, wherein dust is removed from a collecting element and the removed dust is collected.
A pavement material cutting device that includes a traveling device, a cutter device, and a drive source device of the cutter device in a main body body, and causes a cutter blade in the cutter device to act on the pavement surface to form a cutting groove on the pavement surface. ,
This apparatus is provided with the cutting dust collecting apparatus according to claim 1 .

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