JP4963098B2 - Vehicle boosting unit - Google Patents

Description

  The present invention relates to a finisher that performs surface finishing of a pavement.

  Finishers that spread and compact paving materials for roads, parking lots, etc. (asphalt mixture for asphalt paving, etc.), hoppers that contain paving materials, screws that spread paving materials delivered from hoppers, expanded paving It is known as a self-propelled machine equipped with a screed that spreads the material on the traveling vehicle. In this finisher, a construction method is often used in which pavement material is supplied to the hopper by a dump truck. For this purpose, a push roller is provided at the front edge of the hopper provided at the front of the traveling vehicle. is doing.

As described in Patent Document 1, the push roller is a device for pushing and moving the dump truck against the rear wheel of the dump truck. Both ends of the push roller are pivotally supported by a bracket provided at the front edge of the hopper, The dump truck is pushed forward while rotating following. The dump truck at this time has a gear in a neutral position, and is pushed forward by the push roller while being positioned in front of the finisher.
JP 7-102520 A

  Recent dump trucks are provided with a rush prevention device that complies with safety standards at the rear end portion under the loading platform, that is, at a lower position behind the rear wheels. In a vehicle having this rush prevention device, the front edge of the hopper interferes with the rush prevention device, so that the hopper cannot be placed under the loading platform of the dump truck. Therefore, in order to avoid interference of the rush prevention device, a sleeper is put under the rear wheel of the dump truck, or the rush prevention device is removed at the construction site and reattached after construction.

  However, with the sleeper method, construction cannot be performed while pushing the dump truck continuously, and with the method of removing the inrush prevention device, it is necessary to mobilize specialized personnel to perform desorption work at the site, which is also costly It is also disadvantageous in terms of time.

  The present invention has been made in view of such a background, and even a dump truck provided with a rush prevention device can be pushed forward by a finisher so that construction can be performed while receiving the supply of paving material from the dump truck. The vehicle boosting unit for the finisher is provided.

  In the present invention, a hopper that stores a pavement material is provided at the front of the traveling vehicle, and the vehicle booster unit that is attached to a finisher that advances while the pavement material is sent out from the hopper and is spread by a screed is as follows. An aspect is proposed.

  The vehicle boosting unit according to the first aspect is configured to include a wheel base that restrains by placing a rear wheel of the vehicle to be boosted, and a transport device that supports the wheel base. When the rear wheel of the vehicle to be boosted is biaxial, the length of the front wheel is grounded when the rear wheel is mounted, and the rear part of the wheel base is used by attaching it to the front edge of the hopper. To do.

  The vehicle boosting unit according to the second aspect is arranged at the rear part of the wheel base, which is disposed at the rear part of the wheel base, a wheel base for restraining the rear wheel of the vehicle to be boosted by being placed on the wheel base, restrains the impact in the front-rear direction. And a shock absorber that absorbs the rear portion of the wheel base on which the shock absorber is disposed.

  A vehicle boosting unit according to a third aspect is configured to include a wheel base that holds and restrains a rear wheel of a vehicle to be boosted, and a transfer device that supports the wheel base, and the wheel base has a rear end. It is mounted by being pivotally supported at the front edge of the hopper, and can be turned in the vertical direction. The wheel base and the side wall of the hopper can be connected by a connecting means. The pedestal can be lifted and floated with the folding operation.

  The vehicle boosting unit according to the above proposal has a mechanism in which the rear wheel of the vehicle to be boosted is mounted on the wheel base, so that the rear portion of the vehicle is lifted by the height of the wheel base. As a result, the intrusion prevention device is positioned so high that it does not interfere with the front edge of the hopper, and the hopper can be placed under the loading platform of the vehicle, so that the loading platform of the vehicle is dumped and loaded on the loading platform. When the pavement material being unloaded is unloaded, the material is supplied to the hopper without spilling. And since this wheel base is supported by the conveying apparatus and the rear part is mounted | worn with the front edge part of the hopper, it advances, with the rear wheel of a vehicle mounted, as the finisher advances. Therefore, the vehicle on which the rear wheel is mounted on the wheel base moves forward together with the finisher in that state, and the construction can be performed while supplying the pavement material from the vehicle.

  In addition to this, in the vehicle boosting unit according to the first aspect, the front / rear length of the wheel base is not the length on which both wheels of the two axles are mounted in the case of a two-wheel rear wheel vehicle such as a dump truck. The length is such that when the wheel is placed, the front wheel is in contact with the ground, that is, only one wheel is placed. According to this, since one wheel of the two-axis rear wheel comes into contact with the ground and the load is dispersed, the load applied to the wheel base can be reduced and the load can be pushed more smoothly.

  Moreover, in the vehicle boosting unit according to the second aspect, the wheel base is mounted on the hopper with a shock absorber interposed therebetween. According to this, it is possible to absorb an impact generated rearward when the vehicle is placed on the wheel base or by a brake of the vehicle under construction. For example, when replacing a vehicle during construction, temporarily stop the finisher, remove the vehicle with empty loading platform from the wheel platform, and back the replacement vehicle full of paving material on the wheel platform. Become. At this time, in the conventional push roller, the finisher slightly recedes due to the impact when the vehicle that has come back hits the push roller, and the already finished pavement surface just before the stop has an influence such as undulation. Therefore, the structure in which the wheel base is mounted via the shock absorber can improve the structure by absorbing such a rearward impact and preventing the finisher from retreating.

  Furthermore, in the vehicle boosting unit according to the third aspect, the wheel base is mounted so as to be vertically rotatable at the rear end, and the wheel base can be lifted from the ground by the folding operation of the hopper side wall. The finisher hopper is hydraulically folded inward after operation to be compactly transported. In the folding operation, the side wall having the “L” cross section operates like a reverse gull wing door from the bottom to the top, and is folded so as to draw an arc. Therefore, if the wheel base is connected to the side wall by connecting means such as a wire rope, the wheel base can be lifted and floated along with the folding operation. If you lift the wheel base from the ground, you don't have to get in the way of moving the finisher, and you don't have to detach it.

  1 to 4 show a preferred embodiment of a vehicle boosting unit according to the present invention. In this example, the vehicle to be boosted is a dump truck, which is a type of vehicle in which the rear wheels have two front and rear axes.

  The finisher 1 includes a hopper 2 that accommodates a pavement material at the front of a traveling vehicle equipped with a diesel engine. And the screw which spreads the pavement material sent out from the hopper 2 and the screed which spreads and spreads the spread pavement material is equipped in order behind the hopper 2 (for details, refer patent document 1 etc.).

  The hopper 2 has a movable side wall 2a having an L-shaped cross section on both sides, and the side wall 2a is hinged with its end edge pivotally supported on the bottom of the hopper, and the gull wing door is turned upside down. , And can be folded inwardly to draw an arc (see FIG. 4). The folding operation is executed by a hydraulic cylinder and can be stopped at a predetermined angle during folding.

  A bracket 2b capable of pivotally supporting a push roller is originally provided at the front edge portion of the hopper 2, and a vehicle boosting unit 10 having two left and right pieces is mounted using the bracket 2b. Specifically, the shaft 2c is held by the bracket 2b and the rear end piece 12 of the wheel base 11 is pivotally supported by the shaft 2c so that the vehicle boosting unit 10 can be rotated in the vertical direction. It is installed.

  Anti-vibration rubber (for example, V-shaped anti-vibration rubber) is bolted between the wheel base 11 and the rear end piece 12 as a shock absorber 13, and the shock absorber 13 disposed at the rear of the wheel base 11 is provided. The shock in the direction in which the space between the wheel base 11 and the rear end piece 12 is narrowed, that is, the impact in the front-rear direction is absorbed. Further, in the case of this example, the loosely inserted pin 14 is inserted so that the shock absorber 13 is not damaged due to an excessive displacement force applied to the wheel base 11 and the rear end piece 12 during storage. It is also possible to regulate each other's movement. As the shock absorber 13, various applications such as a plate spring, a coil spring, an air damper, and an oil damper can be used in addition to rubber.

  The wheel base 11 is provided with a wheel stopper 11a as a restraining means for placing the rear wheel of the vehicle DT to be pushed on and restraining the rear wheel from being detached during the operation. The restraining means may be only a simple recess formed on the upper surface of the wheel base 11 so that the rear wheel fits in, but in the case of this example, the width of the rear wheel so that the rear wheel can be restrained more reliably. A wheel stopper 11a is used which pivotally supports the long side of a strip-shaped metal piece having a length corresponding to the length of the metal piece so that it can be projected and retracted by turning. The wheel stopper 11a is rotated by a rod-like operation lever 11b so that it can be moved in and out. In the wheel base 11, the wheel mounting surface 11c behind the car stop 11a is depressed, and the rear end portion of the depressed wheel mounting surface 11c is raised like a bank to form a wheel stopper 11d. Yes. The wheel mounting surface 11c is depressed so that the rear wheel of the vehicle DT is directed rearward, and the rear wheel is sandwiched between the rear wheel stopper 11d and the front wheel stopper 11a, so that reliable restraining means is provided. Is configured. In addition, although it is sufficient if the wheel stopper 11a is provided on one side of the vehicle boosting unit 10, it may be provided on both.

  About half of the front side of the wheel base 11 has a slope so that the rear wheel can be easily mounted. The front and rear length L from the front end of the wheel base 11 to the wheel stopper 11d including this slope portion is a biaxial rear wheel of the vehicle DT. The length of one of them can be mounted. That is, when the vehicle DT is backed and the rear wheel R is placed on the wheel base 11 out of the biaxial rear wheels composed of the front wheel F and the rear wheel R and restrained by the wheel stopper 11a, the front wheel F is The front / rear length L is adjusted so as to be grounded without being mounted on the wheel base 11. As a result, the load on the wheel base 11 can be reduced because the front wheel F on one side of the biaxial rear wheel is grounded and the load is dispersed.

  Such a wheel base 11 is supported by the transport device 15 and moves forward with the rear wheel R mounted thereon. In this example, the conveying device 15 is front and rear biaxial rollers 15 a and 15 b that are pivotally supported on the lower portion of the wheel base 11. The roller 15a on the front side is supported by a single cylindrical body placed horizontally, and the roller 15b on the rear side is a structure in which two cylindrical bodies distributed on the left and right sides are supported by a single common shaft. It is. Since the transport device 15 is grounded and supports the wheel base 11, the vehicle DT can be pushed forward without much roughening the construction surface. In this way, the conveying device 15 only needs to have a function of moving the wheel base 11 without making the construction surface as rough as possible. In addition to the roller shape, the conveying device 15 has a ski plate shape, a sled shape, or a crawler (infinite track). ) Or rubber tires.

  The above vehicle boosting unit 10 is mounted on the front edge portion of the hopper 2 by the bracket 2b, and the vehicle DT is backed from the front so that the rear wheel R of the rear wheels of the vehicle DT is placed on the wheel base 11. Used. When the vehicle DT is backed until the rear wheel R hits the wheel stopper 11d, the operation lever 11b is rotated to bring the wheel stopper 11a upward, and the rear wheel R is restrained. Thereby, the rear part of the vehicle DT is lifted by the height of the wheel base 11, and the inrush prevention device DTa is at a high position so as not to interfere with the front edge part of the hopper 2. Therefore, it is possible to put the hopper 2 under the loading platform of the vehicle DT.

  Since the wheel base 11 supported by the transport device 15 moves forward with the rear wheel R mounted by the advance of the finisher 1, if the gear of the vehicle DT is in neutral, the vehicle with the rear wheel mounted on the wheel base 11 The DT moves forward with the finisher 1 in that state. Therefore, it is possible to perform construction while supplying the pavement material from the loading platform of the vehicle DT to the hopper 2.

  When the vehicle DT is backed and placed on the wheel base 11 or when the vehicle DT steps on the brake on a downhill or the like, the vehicle of this example is subjected to a rearward impact on the wheel base 11. According to the booster unit 10, the shock absorber 13 is interposed between the rear end piece 12 and the wheel base 11 is mounted on the hopper 2, so that the shock absorber 13 absorbs the impact. For example, it is assumed that the vehicle DT in which the paving material of the loading platform becomes empty during the construction is replaced with the vehicle DT that is newly loaded with the paving material. In this case, first, the finisher 1 is temporarily stopped, and the vehicle DT in which the loading platform is emptied is advanced to be lowered from the wheel platform 11 and moved to another place. Then, the replacement vehicle DT full of pavement material is turned back toward the vehicle boosting unit 10, and the rear wheel is placed on the wheel base 11.

  At this time, in the conventional push roller, the vehicle DT is backed until it hits the push roller. However, the impact when the vehicle DT hits the push roller slightly retracts the finisher 1, and the finisher 1 is moved back. Ripples are generated on the finished pavement just before pausing. On the other hand, in the case of the vehicle boosting unit 10 according to the present embodiment, since the rear part of the wheel base 11 is mounted via the shock absorber 13, the rearward impact applied when the vehicle DT is placed on the wheel base 11. Can be absorbed. Accordingly, the finisher is prevented from retreating and can be improved.

  Since the vehicle boosting unit 10 of the present embodiment is a two-piece left and right type, the distance between the left and right wheel bases 11 may gradually widen forward as the finisher 1 is advanced. In order to prevent this, in the case of this example, the left and right wheel bases 11 can be connected by the spread prevention rod 16. That is, an engagement pocket 17 having a “U” -shaped opening on its side surface is provided on the inner side of the wheel base 11, and both ends of the expansion preventing rod 16 around which the engagement ring 16 a is provided are respectively connected to the engagement pockets. Insert into 17 from above. Since the side U-shaped opening width of the engagement pocket 17 is narrower than that of the engagement ring 16a, both ends of the expansion preventing rod 16 engage with the engagement pocket 17, respectively, and the space between the wheel bases 11 is expanded. There is no concatenation.

  As shown in FIG. 4, the wheel base 11 of the present embodiment can be attached with a hook 19 for fastening a wire rope 18 as a connecting means. After completion of the operation, the hook 19 is locked with a locking ring 18a formed at one end of the wire rope 18, and the other end of the wire rope 18 is fixed to the side wall 2a of the hopper 2 with a predetermined fixing tool 18b. To do. Since the side wall 2a is folded like a reverse gull wing door by the hydraulic cylinder as described above, the wheel base 11 can be lifted by the wire rope 18 and floated from the ground along with the folding operation. By floating the wheel base 11, it is not necessary to attach and detach the vehicle boosting unit 10 each time so that the finisher 1 does not get in the way.

  At this time, it is not preferable that a large force is applied to the shock absorber 13 in the direction of displacement (shear direction). Therefore, the loose insertion pins 14 are inserted on both sides of the shock absorber 13 in each wheel base 11, and the rear end piece 12. The movement of the wheel base 11 with respect to can be regulated. The loose insertion pin 14 is inserted into the pin hole 21 of the bracket 20 protruding from the rear end piece 12 and the wheel base 11 so as to overlap each other, and restricts movement. The loose insertion pin 14 is removed during construction.

The side view which shows embodiment of a vehicle boosting unit. The top view which shows embodiment of a vehicle boosting unit. The side view which expands and shows a wheel stand, The fraction A is the figure seen from the outer side, The part B is the figure seen from the inner side. The perspective view explaining the state which raised the vehicle boosting unit.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Finisher 2 Hopper 2a Side wall 2b Bracket 2c Shaft rod 10 Vehicle back-up unit 11 Wheel stand 11a Wheel stopper 11b Operation lever 11c Wheel mounting surface 11d Wheel stopper 12 Rear end piece 13 Buffer 14 Loose insertion pin 15 Transport device 15a Front roller 15b Rear roller 16 Expansion prevention rod 17 Engagement pocket 18 Wire rope 19 Hook

Claims (7)

A vehicle boosting unit that is equipped with a finisher that includes a hopper that stores a pavement material at the front portion of the traveling vehicle, is advanced while sending out the pavement material from the hopper, and is spread by a screed,
It is configured to include a wheel base that restrains the rear wheel of the vehicle to be pushed and restrained, and a transfer device that supports the wheel base,
The front / rear length of the wheel base is a length where the front wheel contacts the ground when the rear wheel is mounted when the rear wheel of the vehicle to be boosted is biaxial,
A vehicle boosting unit, wherein the rear portion of the wheel base is used by being attached to a front edge portion of the hopper.   The vehicle boosting unit according to claim 1, further comprising a shock absorber disposed at a rear portion of the wheel base to absorb a shock in a front-rear direction.   3. The vehicle boosting unit according to claim 1, wherein the wheel base includes a wheel stop for restraining the rear wheel so as to be able to appear and retract.   The said wheel stand is mounted | worn by pivotally supporting a rear end to the front edge part of the said hopper, and it can rotate to an up-down direction, The any one of Claims 1-3 characterized by the above-mentioned. Vehicle booster unit.   The wheel base and the side wall of the hopper can be connected by connecting means, and the wheel base can be lifted and floated along with the folding operation of the connected hopper side wall. The vehicle boosting unit according to claim 4. A vehicle boosting unit that is equipped with a finisher that includes a hopper that stores a pavement material at the front portion of the traveling vehicle, is advanced while sending out the pavement material from the hopper, and is spread by a screed,
A wheel base that holds and restrains a rear wheel of a vehicle to be boosted, a transport device that supports the wheel base, and a shock absorber that is disposed at a rear portion of the wheel base and absorbs an impact in the front-rear direction And
A vehicle boosting unit, wherein the rear portion of the wheel base on which the shock absorber is disposed is used by being attached to a front edge portion of the hopper. A vehicle boosting unit that is equipped with a finisher that includes a hopper that stores a pavement material at the front portion of the traveling vehicle, is advanced while sending out the pavement material from the hopper, and is spread by a screed,
It is configured to include a wheel base that restrains the rear wheel of the vehicle to be pushed and restrained, and a transfer device that supports the wheel base,
The wheel base is mounted by pivotally supporting the rear end on the front edge of the hopper, and is rotatable in the vertical direction.
The wheel base and the side wall of the hopper can be connected by connecting means, and the wheel base can be lifted and floated along with the folding operation of the connected hopper side wall. Vehicle boosting unit.

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