JP4688828B2

JP4688828B2 - Paving machine

Info

Publication number: JP4688828B2
Application number: JP2007039614A
Authority: JP
Inventors: 聡小林
Original assignee: Sumitomo SHI Construction Machinery Co Ltd
Current assignee: Sumitomo SHI Construction Machinery Co Ltd
Priority date: 2007-02-20
Filing date: 2007-02-20
Publication date: 2011-05-25
Anticipated expiration: 2027-02-20
Also published as: JP2008202302A

Description

本発明は、走行切換操作手段の発進側または停止側への切り換え操作に応じて前輪駆動手段および後輪駆動手段による前輪および後輪への駆動力の伝達を切り換える舗装機械に関するものである。 The present invention relates to a paving machine that switches transmission of driving force to front wheels and rear wheels by front wheel driving means and rear wheel driving means in accordance with a switching operation of a travel switching operation means to a start side or a stop side.

従来、この種の舗装機械としては、例えば、下記の特許文献１に開示されるアスファルトフィニッシャがある。アスファルトフィニッシャの操作部には、車体の走行開始または走行停止に応じて、油圧ポンプの起動を「ＯＮ」または「ＯＦＦ」に切り替える走行スイッチが備えられている。走行スイッチが「ＯＮ」に切り替えられると、油圧ポンプから供給される圧油が伝えられて油圧モータが駆動される。これにより、車体の前方および後方に設けられた前輪と後輪の４輪が駆動されてアスファルトフィニッシャは走行し、牽引するスクリードによってアスファルトを路面に敷き詰める。
特開２００５−１４７２７５号公報（段落［００１３］〜［００１６］および図１〜図３参照） Conventionally, as this type of paving machine, for example, there is an asphalt finisher disclosed in Patent Document 1 below. The operation part of the asphalt finisher is provided with a travel switch that switches the activation of the hydraulic pump to “ON” or “OFF” in accordance with the start or stop of travel of the vehicle body. When the travel switch is switched to “ON”, the hydraulic oil supplied from the hydraulic pump is transmitted to drive the hydraulic motor. As a result, the front and rear wheels provided at the front and rear of the vehicle body are driven, the asphalt finisher travels, and the asphalt is spread on the road surface by the towed screed.
Japanese Patent Laying-Open No. 2005-147275 (see paragraphs [0013] to [0016] and FIGS. 1 to 3)

しかしながら、特許文献１に開示された上記従来のアスファルトフィニッシャは、前輪が後輪をアシストするように、前輪が後輪よりも速く回転するように駆動調整され、常に前輪が後輪を引張った状態で走行する。このような走行状態において、図１に示す走行スイッチ２１を「ＯＮ」から「ＯＦＦ」に切り替えてアスファルトフィニッシャの走行を停止させると、前輪用電磁弁２２および後輪用電磁弁２３への通電が同時に断たれ、前輪と後輪の駆動力が同時に切れて、アスファルトフィニッシャが少し後退する現象が起こる。この現象により、上記従来のアスファルトフィニッシャは、舗装面を傷つけてしまい、舗装品質に悪影響を与えるという問題があった。 However, the conventional asphalt finisher disclosed in Patent Document 1 is driven and adjusted so that the front wheel rotates faster than the rear wheel so that the front wheel assists the rear wheel, and the front wheel always pulls the rear wheel. Drive on. In such a traveling state, when the traveling switch 21 shown in FIG. 1 is switched from “ON” to “OFF” to stop the traveling of the asphalt finisher, the front wheel solenoid valve 22 and the rear wheel solenoid valve 23 are energized. It is cut off at the same time, and the driving force of the front and rear wheels is cut off at the same time, causing a phenomenon that the asphalt finisher moves back slightly. Due to this phenomenon, the conventional asphalt finisher has a problem that the pavement surface is damaged and the pavement quality is adversely affected.

本発明はこのような課題を解決するためになされたもので、車体の前方および後方に設けられた前輪および後輪と、通電があると前輪へ駆動力を伝達し、通電が断たれると前輪への駆動力の伝達を断つ前輪駆動手段と、通電があると後輪へ駆動力を伝達し、通電が断たれると後輪への駆動力の伝達を断つ後輪駆動手段と、発進側に切り換え操作が行われると前輪駆動手段へ通電を行い、停止側に切り換え操作が行われると前輪駆動手段への通電を断つ走行切換操作手段と、この走行切換操作手段によって前輪駆動手段への通電が行われると速やかに後輪駆動手段へ通電させ、走行切換操作手段によって前輪駆動手段への通電が断れると後輪駆動手段の通電を所定時間遅らせて切断させる通電制御手段とを備えたことを特徴とする。 The present invention has been made to solve such a problem. When power is supplied to the front and rear wheels provided at the front and rear of the vehicle body, the driving force is transmitted to the front wheel and the power supply is cut off. Front wheel drive means that cuts off the transmission of driving force to the front wheels, rear wheel drive means that cuts off transmission of the driving force to the rear wheels when power is cut off, When the switching operation is performed to the side, the front wheel driving means is energized, and when the switching operation is performed to the stop side, the driving switching operation means for cutting off the energization to the front wheel driving means, and the traveling switching operation means to the front wheel driving means. An energization control unit that quickly energizes the rear wheel drive unit when energized and delays energization of the rear wheel drive unit by a predetermined time when the energization to the front wheel drive unit is interrupted by the travel switching operation unit; It is characterized by.

本構成によれば、前輪が後輪を引張って走行している走行状態において、走行切換操作手段による舗装機械の走行を停止する停止操作が行われても、通電制御手段により、前輪駆動手段への通電が切断された後に遅れて後輪駆動手段への通電が切断される。このため、前輪と後輪の駆動力が同時に切れることが無くなり、後輪は前輪が停止してから所定時間遅れて停止するため、舗装機械の停止時に舗装機械が後退する現象を防止することが出来る。この結果、舗装機械の後退によって舗装面が傷つけられることが無くなるので、舗装面は荒れず、舗装品質に悪影響を与えてしまう問題は解消される。 According to this configuration, even when a stop operation for stopping the traveling of the paving machine by the travel switching operation means is performed in a traveling state where the front wheels are traveling by pulling the rear wheels, the energization control means supplies the front wheel drive means. The energization of the rear wheel drive means is cut off after the energization of the rear wheel is cut off. For this reason, the driving force of the front wheel and the rear wheel is not cut off at the same time, and the rear wheel stops after a predetermined time from the stop of the front wheel, thus preventing the phenomenon that the paving machine moves backward when the paving machine stops. I can do it. As a result, the pavement surface is not damaged by the retreat of the pavement machine, so the pavement surface is not roughened and the problem of adversely affecting the pavement quality is solved.

本発明による舗装機械は、上記のように、通電制御手段によって前輪駆動手段への通電が切断された後に遅れて後輪駆動手段への通電が切断されるので、前輪と後輪の駆動力が同時に切れることが無くなる。このため、舗装機械の停止時に舗装機械が後退する現象が防止されて、舗装品質に悪影響を与えてしまう問題は解消される。 As described above, the pavement machine according to the present invention cuts off the energization to the rear wheel driving means after the energization to the front wheel driving means is cut off by the energization control means, so that the driving force of the front wheels and the rear wheels is reduced. It will not be cut at the same time. For this reason, the phenomenon that the paving machine moves backward when the paving machine stops is prevented, and the problem of adversely affecting the paving quality is solved.

次に、本発明を実施するための最良の形態について説明する。 Next, the best mode for carrying out the present invention will be described.

図２は、この最良の形態によるアスファルトフィニッシャ１の側面図、図３は、アスファルトフィニッシャ１の構成の概略を示す一部破断側面図である。 FIG. 2 is a side view of the asphalt finisher 1 according to the best mode, and FIG. 3 is a partially broken side view schematically showing the configuration of the asphalt finisher 1.

図２および図３に示すように、アスファルトフィニッシャ１は、アスファルト加熱混合物ｋが積み込まれるホッパ２が車体の前部に設けられている。ホッパ２の後方の車体下部には、ホッパ２に積み込まれたアスファルト加熱混合物ｋを搬送するコンベヤ３が設けられており、コンベヤ３のさらに後方の車体下部にはスクリュスプレッダ４が設けられている。スクリュスプレッダ４は、スクリュ軸の外周にスクリュ羽根が形成されており、スクリュ軸が定速回転するのに伴いスクリュ羽根が旋回し、コンベヤ３から供給されて路面Ｒ上に落下したアスファルト加熱混合物ｋを路面Ｒの幅方向に撒き拡げる。車体の後方には、撒き拡げたアスファルト加熱混合物ｋを敷き均して舗装面を平滑に仕上げるスクリード装置５が設けられている。アスファルトフィニッシャ１は、車体の前方および後方に設けられた一対の前輪６Ｌ，６Ｒおよび一対の後輪７Ｌ，７Ｒによって進行方向である同図左方に走行し、スクリード装置５を牽引する。また、車体上部の運転席８には操作部９が設けられており、操作部９には、アスファルトフィニッシャ１の走行を操作する後述する走行スイッチ１３や、スクリード装置５を操作する操作レバーや操作スイッチなどが設けられている。 As shown in FIGS. 2 and 3, the asphalt finisher 1 is provided with a hopper 2 in which the asphalt heating mixture k is loaded at the front of the vehicle body. A conveyor 3 for conveying the asphalt heating mixture k loaded on the hopper 2 is provided at the lower part of the vehicle body behind the hopper 2, and a screw spreader 4 is provided at the lower part of the vehicle body further rearward of the conveyor 3. The screw spreader 4 has screw blades formed on the outer periphery of the screw shaft. As the screw shaft rotates at a constant speed, the screw blades swirl and are supplied from the conveyor 3 and fall on the road surface R. Is spread in the width direction of the road surface R. A screed device 5 is provided at the rear of the vehicle body to spread the spread asphalt heating mixture k and smooth the paved surface. The asphalt finisher 1 travels to the left in the figure, which is a traveling direction, by a pair of front wheels 6L and 6R and a pair of rear wheels 7L and 7R provided at the front and rear of the vehicle body, and pulls the screed device 5. The driver's seat 8 at the upper part of the vehicle body is provided with an operation unit 9. The operation unit 9 includes a travel switch 13 that operates the asphalt finisher 1 to be described later, an operation lever that operates the screed device 5, and an operation lever. A switch or the like is provided.

図４は、アスファルトフィニッシャ１の走行電気回路図である。 FIG. 4 is a traveling electric circuit diagram of the asphalt finisher 1.

走行電気回路は、電源供給ラインＬと接地ラインＥとの間に、前輪用電磁弁駆動ソレノイド１１、後輪用電磁弁駆動ソレノイド１２、走行スイッチ１３、およびオフディレータイマ内蔵リレー１４を備えている。 The travel electric circuit includes a front-wheel solenoid valve drive solenoid 11, a rear-wheel solenoid valve drive solenoid 12, a travel switch 13, and a relay with a built-in off-delay timer between a power supply line L and a ground line E. .

前輪用電磁弁駆動ソレノイド１１は、通電があると油圧ポンプからの圧油供給流路を開いて前輪６Ｌ，６Ｒへ駆動力を伝達し、通電が断たれると油圧ポンプからの圧油供給流路を閉じて前輪６Ｌ，６Ｒへの駆動力の伝達を断つ前輪駆動手段を構成している。また、後輪用電磁弁駆動ソレノイド１２は、通電があると油圧ポンプからの圧油供給流路を開いて後輪７Ｌ，７Ｒへ駆動力を伝達し、通電が断たれると油圧ポンプからの圧油供給流路を閉じて後輪７Ｌ，７Ｒへの駆動力の伝達を断つ後輪駆動手段を構成している。 When energized, the front-wheel solenoid valve drive solenoid 11 opens the pressure oil supply flow path from the hydraulic pump to transmit the driving force to the front wheels 6L and 6R, and when energized, the pressure oil supply flow from the hydraulic pump The front wheel drive means is configured to close the road and cut off transmission of the driving force to the front wheels 6L and 6R. Further, when energized, the rear-wheel solenoid valve drive solenoid 12 opens the pressure oil supply flow path from the hydraulic pump to transmit the driving force to the rear wheels 7L and 7R, and when energized, the hydraulic pump drive solenoid 12 A rear wheel drive unit is configured to close the pressure oil supply flow path and cut off transmission of the driving force to the rear wheels 7L and 7R.

また、走行スイッチ１３は、発進側つまり「ＯＮ」側に切り換え操作が行われると前輪用電磁弁駆動ソレノイド１１へ通電を行い、停止側つまり「ＯＦＦ」側に切り換え操作が行われると前輪用電磁弁駆動ソレノイド１１への通電を断つ走行切換操作手段を構成している。すなわち、走行スイッチ１３の「ＯＮ」側接点には前輪用電磁弁駆動ソレノイド１１が直列に接続されており、走行スイッチ１３が「ＯＦＦ」側から「ＯＮ」側に切り換えられると、電源供給ラインＬから「ＯＮ」側接点を介して前輪用電磁弁駆動ソレノイド１１へ電流が通電され、前輪用電磁弁が開いて前輪６Ｌ，６Ｒを駆動する油圧モータに圧油が供給されて、前輪６Ｌ，６Ｒへ駆動力が伝達される。逆に、走行スイッチ１３が「ＯＮ」側から「ＯＦＦ」側に切り換えられると、電源供給ラインＬから「ＯＮ」側接点を介する前輪用電磁弁駆動ソレノイド１１への通電が切断され、前輪用電磁弁が閉じて前輪６Ｌ，６Ｒを駆動する油圧モータへの圧油供給が停止されて、前輪６Ｌ，６Ｒへの駆動力の伝達が断たれる。 The travel switch 13 energizes the front-wheel solenoid valve drive solenoid 11 when a switching operation is performed to the start side, that is, the “ON” side, and when the switching operation is performed to the stop side, that is, the “OFF” side. A travel switching operation means for cutting off the power supply to the valve drive solenoid 11 is configured. That is, the front wheel solenoid valve drive solenoid 11 is connected in series to the “ON” side contact of the travel switch 13, and when the travel switch 13 is switched from the “OFF” side to the “ON” side, the power supply line L Current is supplied to the front-wheel solenoid valve drive solenoid 11 from the “ON” side contact, and the front-wheel solenoid valve is opened and pressure oil is supplied to the hydraulic motor that drives the front wheels 6L, 6R, and the front wheels 6L, 6R. Driving force is transmitted to On the contrary, when the travel switch 13 is switched from the “ON” side to the “OFF” side, the energization of the front wheel solenoid valve drive solenoid 11 via the “ON” side contact from the power supply line L is cut off, and the front wheel solenoid The valve is closed and the supply of pressure oil to the hydraulic motor that drives the front wheels 6L and 6R is stopped, and the transmission of the driving force to the front wheels 6L and 6R is cut off.

また、オフディレータイマ内蔵リレー１４は、前輪用電磁弁駆動ソレノイド１１に並列に接続されたリレーコイル１４ａと、後輪用電磁弁駆動ソレノイド１２に直列に接続されたリレー接点１４ｂとからなり、後輪用電磁弁駆動ソレノイド１２への通電制御手段を構成している。 The off-delay timer built-in relay 14 includes a relay coil 14a connected in parallel to the front-wheel solenoid valve drive solenoid 11 and a relay contact 14b connected in series to the rear-wheel solenoid valve drive solenoid 12. An energization control means for the wheel solenoid valve drive solenoid 12 is configured.

つまり、このオフディレータイマ内蔵リレー１４は、走行スイッチ１３の「ＯＮ」側への切り換え操作によって前輪用電磁弁駆動ソレノイド１１への通電が行われると、リレーコイル１４ａにも同時に通電が行われるので、リレーコイル１４ａが直ちにリレー接点１４ｂを閉じ、速やかに後輪用電磁弁駆動ソレノイド１２へ通電させる。このため、走行スイッチ１３の「ＯＮ」側への切り換え操作によって前輪６Ｌ，６Ｒおよび後輪７Ｌ，７Ｒを駆動する各油圧モータに同時に油圧ポンプからの圧油が供給され、前輪６Ｌ，６Ｒおよび後輪７Ｌ，７Ｒは同時に回転をし始める。ただし、前輪６Ｌ，６Ｒが後輪７Ｌ，７Ｒをアシストするように、前輪６Ｌ，６Ｒが後輪７Ｌ，７Ｒよりも速く回転するように、駆動調整される。従って、アスファルトフィニッシャ１は、常に前輪６Ｌ，６Ｒが後輪７Ｌ，７Ｒを引張った状態で走行する。 In other words, the relay 14 with built-in off-delay timer is energized simultaneously with the relay coil 14a when energization of the solenoid valve drive solenoid 11 for the front wheels is performed by switching the travel switch 13 to the “ON” side. The relay coil 14a immediately closes the relay contact 14b and promptly energizes the rear wheel solenoid valve drive solenoid 12. For this reason, pressure oil from the hydraulic pump is simultaneously supplied to the hydraulic motors that drive the front wheels 6L, 6R and the rear wheels 7L, 7R by the switching operation of the travel switch 13 to the “ON” side, and the front wheels 6L, 6R and the rear wheels The wheels 7L and 7R start to rotate simultaneously. However, the drive adjustment is performed so that the front wheels 6L and 6R rotate faster than the rear wheels 7L and 7R so that the front wheels 6L and 6R assist the rear wheels 7L and 7R. Accordingly, the asphalt finisher 1 always travels with the front wheels 6L and 6R pulling the rear wheels 7L and 7R.

また、オフディレータイマ内蔵リレー１４は、走行スイッチ１３の「ＯＦＦ」側への切り換え操作によって前輪用電磁弁駆動ソレノイド１１への通電が断たれると、リレーコイル１４ａへの通電も同時に断たれるが、リレーコイル１４ａが所定時間遅れてリレー接点１４ｂを開くことにより、後輪用電磁弁駆動ソレノイド１２の通電を所定時間遅らせて切断させる。このため、走行スイッチ１３の「ＯＦＦ」側への切り換え操作時には、後輪７Ｌ，７Ｒを駆動する油圧モータへの圧油供給停止は、前輪６Ｌ，６Ｒを駆動する油圧モータへの圧油供給停止から所定時間遅れて行われる。よって、後輪７Ｌ，７Ｒは前輪６Ｌ，６Ｒの回転停止から所定時間遅れて回転が停止する。 Further, the relay 14 with a built-in off-delay timer is also turned off at the same time when the energization of the solenoid valve drive solenoid 11 for the front wheels is cut off by the switching operation of the travel switch 13 to the “OFF” side. However, when the relay coil 14a opens the relay contact 14b with a delay of a predetermined time, the energization of the rear-wheel solenoid valve drive solenoid 12 is delayed with a predetermined time to be cut off. Therefore, when the travel switch 13 is switched to the “OFF” side, the supply of pressure oil to the hydraulic motor that drives the rear wheels 7L and 7R is stopped when the supply of pressure oil to the hydraulic motor that drives the front wheels 6L and 6R is stopped. From a predetermined time. Therefore, the rotation of the rear wheels 7L, 7R stops after a predetermined time delay from the rotation stop of the front wheels 6L, 6R.

本実施形態によれば、アスファルトフィニッシャ１の前輪６Ｌ，６Ｒが後輪７Ｌ，７Ｒを引張って走行している走行状態において、走行スイッチ１３によるアスファルトフィニッシャ１の走行を停止する「ＯＮ」側から「ＯＦＦ」側に切り換え操作が行われても、オフディレータイマ内蔵リレー１４により、上述したように、前輪用電磁弁駆動ソレノイド１１への通電が切断された後に遅れて後輪用電磁弁駆動ソレノイド１２への通電が切断される。このため、本実施形態によれば、前輪６Ｌ，６Ｒと後輪７Ｌ，７Ｒの駆動力が同時に切れることが無くなり、後輪７Ｌ，７Ｒは前輪６Ｌ，６Ｒが停止してから所定時間遅れて停止するため、アスファルトフィニッシャ１の停止時にアスファルトフィニッシャ１が後退する現象を防止することが出来る。この結果、アスファルトフィニッシャ１の後退によって舗装面が傷つけられることが無くなるので、舗装面は荒れず、舗装品質に悪影響を与えてしまう問題は解消される。 According to the present embodiment, in the traveling state in which the front wheels 6L, 6R of the asphalt finisher 1 are traveling while pulling the rear wheels 7L, 7R, the “ON” side from which the traveling switch 13 stops traveling of the asphalt finisher 1 “ Even if the switching operation to the “OFF” side is performed, the relay 14 for the rear wheel is delayed after the energization to the solenoid valve drive solenoid 11 for the front wheel is cut off by the relay 14 with built-in off-delay timer as described above. The power supply to is cut off. Therefore, according to the present embodiment, the driving forces of the front wheels 6L, 6R and the rear wheels 7L, 7R are not cut off at the same time, and the rear wheels 7L, 7R are stopped after a predetermined time from the stop of the front wheels 6L, 6R. Therefore, it is possible to prevent the asphalt finisher 1 from retreating when the asphalt finisher 1 is stopped. As a result, the pavement surface is not damaged by the retreat of the asphalt finisher 1, so the pavement surface is not roughened and the problem of adversely affecting the pavement quality is solved.

上記実施形態においては、本発明の舗装機械をアスファルトフィニッシャ１に適用した場合について説明したが、前輪および後輪を備えて走行するコンクリートフィニッシャといった他の舗装機械に適用しても、上記実施形態と同様な作用効果が奏される。 In the above-described embodiment, the case where the paving machine of the present invention is applied to the asphalt finisher 1 has been described. However, the present invention can be applied to other paving machines such as a concrete finisher that travels with front wheels and rear wheels. Similar effects are achieved.

従来のアスファルトフィニッシャの走行電気回路図である。It is a driving | running | working electric circuit diagram of the conventional asphalt finisher. 本発明の最良の実施形態によるアスファルトフィニッシャの外観を示す側面図である。It is a side view which shows the external appearance of the asphalt finisher by the best embodiment of this invention. 図２に示すアスファルトフィニッシャの構成の概略を示す一部破断側面図である。It is a partially broken side view which shows the outline of a structure of the asphalt finisher shown in FIG. 図２に示すアスファルトフィニッシャの走行電気回路図である。FIG. 3 is a traveling electric circuit diagram of the asphalt finisher shown in FIG. 2.

Explanation of symbols

１…アスファルトフィニッシャ
６Ｌ，６Ｒ…前輪
７Ｌ，７Ｒ…後輪
１１…前輪用電磁弁駆動ソレノイド
１２…後輪用電磁弁駆動ソレノイド
１３…走行スイッチ
１４…オフディレータイマ内蔵リレー
１４ａ…リレーコイル
１４ｂ…リレー接点 DESCRIPTION OF SYMBOLS 1 ... Asphalt finisher 6L, 6R ... Front wheel 7L, 7R ... Rear wheel 11 ... Front wheel solenoid valve drive solenoid 12 ... Rear wheel solenoid valve drive solenoid 13 ... Travel switch 14 ... Relay with built-in off-delay timer 14a ... Relay coil 14b ... Relay contact

Claims

Front wheel and rear wheels provided at the front and rear of the vehicle body, front wheel drive means for transmitting driving force to the front wheel when energized, and cutting off transmission of driving force to the front wheel when energized, energized If there is, the driving force is transmitted to the rear wheel, and when the power is cut off, the driving force to the rear wheel is cut off, and the switching operation to the start side is performed to the front wheel driving unit. When the energization is performed and the switching operation to the stop side is performed, the travel switching operation means for cutting off the energization to the front wheel driving means, and when the front wheel driving means is energized by the travel switching operation means, the rear wheel is promptly A pavement machine comprising: energization control means for energizing the drive means and delaying energization of the rear wheel drive means for a predetermined time when the energization to the front wheel drive means is cut off by the travel switching operation means. .