JP2019094633A - Rolling drum of rolling vehicle - Google Patents

Rolling drum of rolling vehicle Download PDF

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JP2019094633A
JP2019094633A JP2017222758A JP2017222758A JP2019094633A JP 2019094633 A JP2019094633 A JP 2019094633A JP 2017222758 A JP2017222758 A JP 2017222758A JP 2017222758 A JP2017222758 A JP 2017222758A JP 2019094633 A JP2019094633 A JP 2019094633A
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chamber
drum
roller
inner ring
side wall
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JP6814720B2 (en
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進弥 菅嶋
Shinya Sugashima
進弥 菅嶋
裕樹 竹内
Hiroki Takeuchi
裕樹 竹内
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Hitachi Construction Machinery Co Ltd
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Hitachi Construction Machinery Co Ltd
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Abstract

To provide a rolling drum of a rolling vehicle capable of reducing manufacturing cost, and capable of keeping an excellent aesthetic appearance of the vehicle, after adopting a gas breathing countermeasure when manufacturing the rolling drum of a welding structure.SOLUTION: Both sides of an inner ring 24 and an outer ring 25 doubly arranged on the inside-outside, are respectively blocked up by an outer peripheral side wall 26, and an inside chamber 27 airtightly held by a welding structure is defined between the inner ring 24 and the outer ring 25. A mechanism chamber 30 is defined by welding a pair of left-right inner peripheral side walls 29 to an inner peripheral surface of the inner ring 24, and a bearing member 22 is fastened by a bolt 32 to the left side inner peripheral side wall 29, and a hydraulic motor 23 is fastened by the bolt 32 to the right side inner peripheral side wall 29, so that the mechanism chamber 30 is airtightly held. A gas breathing hole 33 is penetratingly provided in the inner ring 24 for partitioning the inside chamber 27 and the mechanism chamber 30.SELECTED DRAWING: Figure 2

Description

本発明は、転圧車両の転圧ドラムに関する。   The present invention relates to a pressure roller drum of a pressure roller vehicle.

例えばマカダムローラは、走行輪を兼ねた前２輪、後１輪の転圧ドラムを備えており、各転圧ドラムを回転駆動して走行しながら路面の締固め作業を実施している。例えば特許文献１に記載のマカダムローラの転圧ドラムは、内外二重に配設された内輪及び外輪の左右両側をそれぞれ側壁により閉塞し、内輪の内周側に画成された機構室には油圧モータを組み付け、この油圧モータを介して車体側から転圧ローラを支持しながら回転駆動するようになっている。   For example, Macadam rollers are equipped with two front and one rear roller compacting drums that also serve as running wheels, and are compacted on the road surface while traveling while rotationally driving each compacting drum. For example, in the Macadam roller compacted drum disclosed in Patent Document 1, the left and right sides of the inner ring and the outer ring, which are disposed in both inner and outer layers, are closed by side walls respectively, and a mechanism chamber defined on the inner circumferential side of the inner ring A hydraulic motor is assembled and rotationally driven while supporting the pressure roller from the vehicle body side via the hydraulic motor.

内輪と外輪との間には左右側壁の閉塞により内部室が画成され、この内部室は内部への水等の侵入に起因する腐食防止のために溶接構造により気密保持されている。特許文献１の技術では、路面に対する転圧力を増加させるために内部室を利用しており、その内部に水を注入して車両の自重を増加させることが可能となっている。このため、転圧ドラムの一方の側壁には内部に水を注入可能な注水孔が貫設され、通常時はプラグが装着されて封止されている。   An inner chamber is defined between the inner ring and the outer ring by closing the left and right side walls, and the inner chamber is airtightly held by a welded structure to prevent corrosion caused by the entry of water or the like into the inner portion. In the technique of Patent Document 1, an internal chamber is used to increase the rolling pressure on the road surface, and it is possible to inject water into the interior to increase the weight of the vehicle. For this reason, a water injection hole through which water can be injected is formed in one side wall of the roller compacting drum, and a plug is usually attached and sealed.

ところで、溶接構造の転圧ドラムを製作する際にはガス抜き対策が必要になる。具体的に述べると、内輪及び外輪の左右端縁に対して側壁が連続的に溶接されることにより、最終的に密閉された内部室が画成されるのであるが、このときアークによる溶融箇所ではガスが生じ、内部室内では溶接熱により空気が膨張する。これらの溶接ガス及び空気は未だ溶接されていない隙間を経て溶接中に常に外部に吹き出し、溶融金属に悪影響を与えてブローホールや溶接欠陥の要因になり得る。特許文献１の技術では、側壁のプラグを取り外して溶接を実施することにより、溶接ガスや空気を注水孔から外部に逃がして上記不具合を防止している。   By the way, when producing a pressure roller drum of a welding structure, measures against degassing are required. Specifically, the side walls are continuously welded to the left and right end edges of the inner ring and the outer ring, thereby defining a finally sealed inner chamber. In this case, gas is generated and air is expanded in the inner chamber by welding heat. These welding gases and air always blow out during welding through gaps which have not yet been welded, which may adversely affect the molten metal and cause blow holes and welding defects. In the technique of Patent Document 1, the welding gas and the air are released from the water injection hole to the outside to prevent the above-mentioned problems by removing the plug of the side wall and performing welding.

特開２００８−１３８４４３号公報JP 2008-138443 A

ところで、特許文献１の転圧ドラムのような注水機能は全ての転圧車両に要望されるものではなく、そのような転圧車両では、コスト低減のために注水孔及びプラグが廃止される。しかしながら、溶接時のガス抜き対策は必要なため、注水孔に代えて転圧ローラの側壁にガス抜き孔を貫設し、溶接作業の完了後にガス抜き孔に鉄片を溶接して封止している。   By the way, the water injection function like the roller compacting drum of patent document 1 is not required for all roller compacting vehicles, and in such a roller compacted vehicle, a water injection hole and a plug are abolished for cost reduction. However, since it is necessary to take measures against degassing at the time of welding, a degassing hole is inserted through the side wall of the pressure roller instead of the water injection hole, and iron pieces are welded and sealed in the degassing hole after the welding operation is completed. There is.

結果として、注水孔及びプラグの廃止により得られたコスト低減の大半は、ガス抜き孔の加工及び鉄片の溶接を実施することで相殺されるため、コスト的なメリットがほとんど得られない。また、転圧ローラの側壁にパッチを当てたような鉄片が露出するため、転圧車両の美観低下の要因になるという問題も生じた。   As a result, most of the cost reduction obtained by the abolition of the water injection holes and plugs is offset by the processing of the degassing holes and the welding of the iron pieces, so there is almost no cost advantage. In addition, since iron pieces, such as patches applied to the side walls of the pressure roller, are exposed, there is a problem that this causes a reduction in the appearance of the pressure roller.

本発明はこのような問題点を解決するためになされたもので、その目的とするところは、溶接構造の転圧ドラムを製作する際のガス抜き対策を講じた上で、製造コストを低減できると共に良好な車両の美観を保つことができる転圧車両の転圧ドラムを提供することにある。   The present invention has been made to solve such problems, and the object of the present invention is to reduce the manufacturing cost after taking measures against degassing at the time of manufacturing a roller compact of a welded structure. It is an object of the present invention to provide a rolling drum of a rolling compact that can maintain good vehicle appearance.

上記の目的を達成するため、本発明は、内外二重に配設された内輪及び外輪の両側がそれぞれ側壁により閉塞されて、前記内輪と前記外輪との間に溶接構造により気密保持された内部室が画成されると共に、前記内輪の内周側に機構室が画成されたドラム本体と、前記機構室を気密保持し、且つ前記ドラム本体を車体側から支持して回転駆動可能なように、前記機構室に組み付けられた支持・駆動機構とを備えた転圧車両の転圧ドラムにおいて、前記内部室と前記機構室とを連通させるガス抜き孔が前記内輪に貫設されたことを特徴とする。   In order to achieve the above object, according to the present invention, an inner ring and an outer ring both disposed inside and outside are both closed by a side wall and airtightly held between the inner ring and the outer ring by a welded structure. A chamber is defined, and a drum main body whose mechanism chamber is defined on the inner circumferential side of the inner ring is airtightly held, and the mechanism main body is supported rotatably from the vehicle body side. In the roller compacting drum of a roller compacting vehicle provided with a support and drive mechanism assembled to the mechanism chamber, it is understood that a gas venting hole communicating the internal chamber and the mechanism chamber is provided through the inner ring. It features.

本発明の転圧車両の転圧ドラムによれば、溶接構造の転圧ドラムを製作する際のガス抜き対策を講じた上で、製造コストを低減できると共に良好な車両の美観を保つことができる。   According to the roller compacting drum of the roller compacting vehicle of the present invention, it is possible to reduce the manufacturing cost and maintain the good appearance of the vehicle while taking measures against degassing when manufacturing the roller compacting structure of the welded structure. .

実施形態のマカダムローラを示す側面図である。It is a side view showing a macadam roller of an embodiment. 後部転圧ドラムを示す図１のII-II線断面図である。FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1 showing a rear roller compacting drum.

以下、本発明をマカダムローラの後部転圧ドラムに具体化した一実施形態を説明する。
図１は本実施形態のマカダムローラを示す側面図である。以下の説明では、車両を基準として前後方向及び左右方向を表現する。 Hereinafter, an embodiment in which the present invention is embodied in a rear roller compacting drum of a macadam roller will be described.
FIG. 1 is a side view showing a macadam roller of the present embodiment. In the following description, the front-rear direction and the left-right direction are expressed with reference to the vehicle.

マカダムローラ１（以下、車両と称することもある）の車体は、左右一対の前部転圧ドラム２を備えた前部車体４と１つの後部転圧ドラム３（転圧ドラム）を備えた後部車体５とにより構成されている。これらの車体４，５はアーティキュレート機構６を介して連結されており、前部車体４に設けられた図示しない操舵シリンダの駆動により、アーティキュレート機構６を中心として前部及び後部車体４，５が水平方向に屈曲することで車両１が旋回するようになっている。   The vehicle body of the macadam roller 1 (hereinafter sometimes referred to as a vehicle) has a front vehicle body 4 provided with a pair of left and right front roller compacting drums 2 and a rear vehicle equipped with one rear roller compacting drum 3 (pressure roller drum). It is comprised by the vehicle body 5 and. The vehicle bodies 4 and 5 are connected via an articulating mechanism 6 and driven by a steering cylinder (not shown) provided on the front vehicle body 4 so that the front and rear vehicle bodies 4 and 5 center on the articulating mechanism 6. The vehicle 1 is made to turn by bending in the horizontal direction.

前部転圧ドラム２は前部車体４の左右に配設されて回転可能に支持されると共に、それぞれ図示しない油圧モータにより回転駆動されるようになっている。また、後部車体５からは左右一対の支持アーム５ａが後方に延設され、それらの支持アーム５ａの間に後部転圧ドラム３が配設されている。後部転圧ドラム３は左右の支持アーム５ａから支持されると共に油圧モータ２３で回転駆動されるが、その詳細については後述する。   The front roller compacting drum 2 is disposed on the left and right of the front vehicle body 4 and rotatably supported, and is rotationally driven by a hydraulic motor (not shown). Further, a pair of left and right support arms 5a is extended rearward from the rear vehicle body 5, and the rear roller compacting drum 3 is disposed between the support arms 5a. The rear roller compacting drum 3 is supported by the left and right support arms 5a and is rotationally driven by the hydraulic motor 23. The details will be described later.

前部車体４上にはステアリング１０を備えた操作台１１が設置され、操作台１１の後側にはステアリング１０に対応して運転席１２が設置されている。なお、締固め作業中にオペレータが左右の転圧際を容易に視認可能なように、図示はしないが、ステアリング１０及び運転席１２は左右一対設けられている。マカダムローラ１に搭乗して何れかの運転席１２に着座したオペレータは、ステアリング１０及び操作台１１の前後進レバー１３や足下の図示しないブレーキペダルなどを操作し、その操作に応じて車両１の走行や操舵などが行われる。   An operating console 11 provided with a steering 10 is installed on the front vehicle body 4, and a driver's seat 12 is installed on the rear side of the operating console 11 corresponding to the steering 10. Although not shown, the steering 10 and the driver's seat 12 are provided in pairs so that the operator can easily visually recognize the left and right rolling pressure during the compacting operation. The operator who gets on the macadam roller 1 and sits in any of the driver's seats 12 operates the steering 10, the forward / backward lever 13 of the operation table 11 and a brake pedal (not shown) under his foot, and the vehicle 1's Driving and steering are performed.

後部車体５上には水を貯留した貯水タンク１５が設置され、図示はしないが前部及び後部転圧ドラム２，３の近接位置には散水ノズルが配設され、各散水ノズルは配管及び散水ポンプを介して貯水タンク１５に接続されている。締め固め作業時には前部及び後部転圧ドラム２，３への舗装材の付着防止を目的として、貯水タンク１５内の水が散水ポンプにより各散水ノズルに供給されて前部及び後部転圧ドラム２，３へと散水される。   A water storage tank 15 for storing water is installed on the rear vehicle body 5. A water spray nozzle is disposed near the front and rear roller compacting drums 2 and 3 although not shown, and each water spray nozzle is a pipe and water spray It is connected to the water storage tank 15 via a pump. Water in the water storage tank 15 is supplied to each of the water spray nozzles by a water spray pump for the purpose of preventing adhesion of the pavement material to the front and rear roller compacting drums 2 and 3 at the time of compacting operation. , Watered to 3.

図２は後部転圧ドラム３を示す図１のII-II線断面図であり、以下、同図に基づき後部転圧ドラム３の構成を説明する。
後部転圧ドラム３は、鋼板材料による溶接構造からなるドラム本体２１、及びその内部（後述する機構室３０内）に組み付けられる軸受部材２２（支持・駆動機構）や油圧モータ２３（支持・駆動機構）等から構成されている。 FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1 showing the rear roller compacting drum 3. The configuration of the rear roller compacting drum 3 will be described below based on FIG.
The rear roller compacting drum 3 includes a drum main body 21 having a welded structure made of a steel plate material, a bearing member 22 (support / drive mechanism) assembled in the inside (in the mechanism chamber 30 described later), and a hydraulic motor 23 (support / drive mechanism And so on.

ドラム本体２１の内輪２４及び外輪２５は径違いの円筒状をなし、後部転圧ドラム３の回転軸線Ｌを中心として内外二重に配設されている。内輪２４及び外輪２５の左右両側には平板環状をなす外周側壁２６（側壁）がそれぞれ配設され、これらの外周側壁２６により内輪２４と外輪２５との間が閉塞されて環状の内部室２７が画成されている。
各外周側壁２６の内周縁はそれぞれ内輪２４の外周面に当接して連続的に溶接され、外周縁はそれぞれ外輪２５の内周面に当接して連続的に溶接されている。結果として各溶接箇所には全周に亘る溶接ビード２８が形成され、このような溶接構造により内部室２７は外部から気密保持されている。 The inner ring 24 and the outer ring 25 of the drum main body 21 have cylindrical shapes with different diameters, and are disposed in an inner and outer double centering on the rotation axis L of the rear roller compacting drum 3. A flat annular outer peripheral side wall 26 (side wall) is disposed on the left and right sides of the inner ring 24 and the outer ring 25 respectively, and the inner ring 24 and the outer ring 25 are closed by the outer peripheral side wall 26. It is made up.
The inner peripheral edge of each outer peripheral side wall 26 is in contact with the outer peripheral surface of the inner ring 24 to be welded continuously, and the outer peripheral edge is in contact with the inner peripheral surface of the outer ring 25 to be welded continuously. As a result, weld beads 28 are formed over the entire circumference at each weld point, and the inner chamber 27 is airtightly held from the outside by such a weld structure.

内輪２４の内部には円盤状をなす左右一対の内周側壁２９が配設され、これらの内周側壁２９により内輪２４の内周側に機構室３０が画成されている。各内周側壁２９の外周縁はそれぞれ内輪２４の内周面に当接して連続的に溶接され、結果として各溶接箇所には全周に亘る溶接ビード３１が形成されている。この点は、内部室２７の溶接構造と同様である。   A pair of left and right inner peripheral side walls 29 having a disk shape are disposed inside the inner ring 24, and a mechanism chamber 30 is defined on the inner peripheral side of the inner ring 24 by the inner peripheral side walls 29. The outer peripheral edge of each inner peripheral side wall 29 abuts on the inner peripheral surface of the inner ring 24 and is continuously welded, and as a result, a weld bead 31 is formed over the entire circumference at each welding point. This point is the same as the welded structure of the inner chamber 27.

機構室３０には軸受部材２２及び油圧モータ２３が組み付けられ、これらの部材２２，２３によりドラム本体２１が後部車体５側から支持されると共に、油圧モータ２３により回転駆動されるようになっている。   A bearing member 22 and a hydraulic motor 23 are attached to the mechanism chamber 30, and the drum body 21 is supported from the rear vehicle body 5 side by these members 22 and 23, and is rotationally driven by the hydraulic motor 23 .

詳しく述べると、軸受部材２２及び油圧モータ２３の組付のために、左右の内周側壁２９にはそれぞれ回転軸線Ｌを中心としてフランジ孔２９ａが貫設されると共に、その周囲に複数の雌ネジ部２９ｂが形成されている。左側の内周側壁２９（機構室の一側）のフランジ孔２９ａには軸受部材２２がインローにより嵌合し、右側の内周側壁２９（機構室の他側）のフランジ孔２９ａには油圧モータ２３がインローにより嵌合し、それぞれ雌ネジ部２９ｂに螺合したボルト３２により内周側壁２９に締結されている。   More specifically, in order to assemble the bearing member 22 and the hydraulic motor 23, flange holes 29a are formed through the left and right inner peripheral side walls 29 with the rotation axis L as a center, and a plurality of female screws are formed around the flange holes 29a. The portion 29b is formed. The bearing member 22 is fitted in the flange hole 29a of the left inner peripheral side wall 29 (one side of the mechanism chamber) by an inlay, and the hydraulic motor is installed in the flange hole 29a of the right inner peripheral side wall 29 (the other side of the mechanism chamber). 23 are fitted by inlaying, and are fastened to the inner circumferential side wall 29 by bolts 32 screwed to the respective female screw portions 29b.

インロー箇所の接合面、具体的には、各フランジ孔２９ａの内周面及びその周辺の外側面は芯出しのために予め機械加工されているため、各フランジ孔２９ａは軸受部材２２及び油圧モータ２３により完全に閉塞されている。なお、油圧モータ２３の設置スペースを確保するために、右側の内周側壁２９は内輪２４の若干奥まった位置に配置されている。   Since the joint surface at the inlay point, specifically, the inner peripheral surface of each flange hole 29a and the outer surface around it are pre-machined for centering, each flange hole 29a is a bearing member 22 and a hydraulic motor It is completely blocked by 23. In order to secure the installation space of the hydraulic motor 23, the inner peripheral side wall 29 on the right side is disposed at a position slightly behind the inner ring 24.

そして、軸受部材２２は後部車体５の左側の支持アーム５ａに連結され、油圧モータ２３は後部車体５の右側の支持アーム５ａに連結されており、これにより、上記のようなドラム本体２１の支持及び油圧モータ２３による駆動がなされる。   The bearing member 22 is connected to the left support arm 5a of the rear body 5, and the hydraulic motor 23 is connected to the right support arm 5a of the rear body 5, thereby supporting the drum body 21 as described above. And driving by the hydraulic motor 23 is performed.

ところで、以上のような溶接構造のドラム本体２１を製作する際には、ガス抜き対策が必要である。このため［発明が解決しようとする課題］で述べたように、従来からドラム本体の側壁にガス抜き孔を貫設し、溶接作業の完了後にガス抜き孔に鉄片を溶接して封止しているが、コスト的に不利な上に転圧車両の美観を低下させる要因にもなる。   By the way, when manufacturing the drum main body 21 of the above welding structures, the countermeasure against degassing is required. For this reason, as described in [Problems to be solved by the invention], conventionally, a gas venting hole is formed through the side wall of the drum body, and iron pieces are welded and sealed in the gas venting hole after the completion of the welding operation. However, it is also disadvantageous in terms of cost and is also a factor that reduces the appearance of the rolling vehicle.

このような不具合を鑑みて本発明者は、軸受部材２２及び油圧モータ２３の組付前（ドラム本体２１の溶接時も含む）と組付後とで、機構室３０の外部に対する連通状態が変化する点に着目した。
即ち、軸受部材２２及び油圧モータ２３の組付前の機構室３０は、各内周側壁２９のフランジ孔２９ａを介して外部と連通している。これに対して組付後には、各フランジ孔２９ａが軸受部材２２及び油圧モータ２３により完全に閉塞され、且つ上記のように各内周側壁２９の外周縁も内輪２４の内周面に対し全周を溶接されているため、機構室３０が外部から気密保持される。 In view of such problems, the inventor of the present invention changes the communication state of the mechanism chamber 30 with the outside before and after assembling the bearing member 22 and the hydraulic motor 23 (including when welding the drum body 21). Focused on the
That is, the mechanism chamber 30 before the assembly of the bearing member 22 and the hydraulic motor 23 communicates with the outside through the flange holes 29 a of the respective inner peripheral side walls 29. On the other hand, after assembly, each flange hole 29a is completely closed by the bearing member 22 and the hydraulic motor 23, and the outer peripheral edge of each inner peripheral side wall 29 is all against the inner peripheral surface of the inner ring 24 as described above. Since the circumference is welded, the mechanism chamber 30 is airtightly maintained from the outside.

そして、軸受部材２２及び油圧モータ２３の組付は、溶接作業によりドラム本体２１を完成させた後に実施される。このため、仮に内部室２７と機構室３０とが連通している場合には、組付前の内部室２７は機構室３０を介して外部と連通してガス抜き機能が奏され、組付後の内部室２７は機構室３０とは連通し続けるものの、外部に対しては遮断されて気密保持されることになる。   Then, the bearing member 22 and the hydraulic motor 23 are assembled after the drum body 21 is completed by the welding operation. Therefore, if the internal chamber 27 and the mechanical chamber 30 are in communication with each other, the internal chamber 27 before assembly is communicated with the outside through the mechanical chamber 30, and the degassing function is exhibited. The inner chamber 27 continues to communicate with the mechanism chamber 30, but is shut off from the outside and kept airtight.

このような知見の下に本実施形態では、内部室２７と機構室３０とを区画している内輪２４にガス抜き孔３３を貫設している。本実施形態では、内輪２４の車幅方向の中央の１箇所に内径12mmのガス抜き孔３３を形成しており、このガス抜き孔３３を介して内部室２７と機構室３０とが互いに連通されている。
ガス抜き孔３３を小径且つ１つとしているのは、溶接時に発生するガスの排出のためには大きな開口面積は不要であり、また不必要に大きな開口面積はドラム本体２１の剛性低下の要因になる点を配慮した結果である。但し、これに限るものではなく、その径や数を任意に変更してもよい。 Under such knowledge, in the present embodiment, the gas venting hole 33 is formed through the inner ring 24 that divides the internal chamber 27 and the mechanical chamber 30. In the present embodiment, a gas venting hole 33 with an inner diameter of 12 mm is formed at one position in the center of the inner ring 24 in the vehicle width direction, and the internal chamber 27 and the mechanical chamber 30 are communicated with each other via the gas venting hole 33. ing.
The small diameter and single vent hole 33 do not require a large opening area for exhausting the gas generated during welding, and an unnecessarily large opening area is a factor in the reduction of the rigidity of the drum body 21. In consideration of the However, the present invention is not limited to this, and the diameter and the number thereof may be arbitrarily changed.

次に、以上のように構成された後部転圧ドラム３の製作手順を説明する。
まず、ドラム本体２１を構成する各パーツを製作する。具体的には、内輪２４及び外輪２５を径違いの円筒状に成形し、外周側壁２６を平板環状に成形し、内周側壁２９をフランジ孔２９ａを有する円盤状に成形する。この時点で、既に内輪２４にはガス抜き孔３３が貫設されている。 Next, a manufacturing procedure of the rear roller compacting drum 3 configured as described above will be described.
First, each part which comprises the drum main body 21 is manufactured. Specifically, the inner ring 24 and the outer ring 25 are formed into cylindrical shapes with different diameters, the outer peripheral side wall 26 is formed into a flat plate annular shape, and the inner peripheral side wall 29 is formed into a disk shape having flange holes 29a. At this time, the gas venting hole 33 has already been formed in the inner ring 24.

次いで、これらのパーツを互いに溶接して溶接構造のドラム本体２１を完成させる。各パーツの溶接順序は限定されないが、溶接作業の何れかの時点で内部室２７が画成される。
例えば、内輪２４と外周側壁２６とを先に溶接した場合には、外周側壁２６の外周側に外輪２５を配置して、外周側壁２６の外周縁と外輪２５の内周面とを溶接する時点で内部室２７が画成される。逆に外輪２５と外周側壁２６とを先に溶接した場合には、外周側壁２６の内周側に内輪２４を配置して、外周側壁２６の内周縁と内輪２４の外周面とを溶接する時点で内部室２７が画成される。 These parts are then welded together to complete the welded drum body 21. Although the welding order of each part is not limited, the inner chamber 27 is defined at any time of the welding operation.
For example, when the inner ring 24 and the outer peripheral side wall 26 are welded first, the outer ring 25 is disposed on the outer peripheral side of the outer peripheral side wall 26, and the outer peripheral edge of the outer peripheral side wall 26 and the inner peripheral surface of the outer ring 25 are welded The internal chamber 27 is defined at. Conversely, when the outer ring 25 and the outer peripheral side wall 26 are welded first, the inner ring 24 is disposed on the inner peripheral side of the outer peripheral side wall 26, and the inner peripheral edge of the outer peripheral side wall 26 and the outer peripheral surface of the inner ring 24 are welded The internal chamber 27 is defined at.

何れの場合も、溶接ビード２８により完全に気密保持されてはいないものの、内部室２７が既に画成されている。このため、仮に特許文献１の注水孔或いは従来技術のガス抜き孔３３が無いとすると、内部室２７の内外の連通箇所は溶接予定の僅かな隙間だけとなり、この隙間を経て溶接ガスや膨張した空気が外部に吹き出して溶融金属に悪影響を与えてしまう。   In any case, the inner chamber 27 has already been defined, although it is not kept completely airtight by the weld bead 28. For this reason, assuming that the water injection hole of Patent Document 1 or the gas vent hole 33 of the prior art is not provided, the internal and external communication locations of the internal chamber 27 have only a slight gap to be welded, and the welding gas or expanded through this gap. Air is blown out to adversely affect the molten metal.

しかし本実施形態では、これらの溶接ガスや空気が内部室２７内から内輪２４のガス抜き孔３３を経て機構室３０に逃がされ、さらにフランジ孔２９ａを経て外部に逃がされるため、溶接予定の隙間を経て吹き出す溶接ガスや空気が激減する。よって、これらの溶接ガスや空気による溶融金属への悪影響が抑制され、ブローホールや溶接欠陥の発生を未然に防止することができる。   However, in the present embodiment, these welding gases and air escape from the inside of the inner chamber 27 through the degassing holes 33 of the inner ring 24 to the mechanical chamber 30, and further escape to the outside through the flange holes 29a. The welding gas and air blown out through the gap are drastically reduced. Therefore, the adverse effect on the molten metal due to the welding gas and air can be suppressed, and the generation of the blow holes and the welding defects can be prevented in advance.

このようにして溶接作業が完了してドラム本体２１が完成すると、各内周側壁２９のインロー箇所の接合面（フランジ孔２９ａの内周面及びその周辺）を機械加工すると共に雌ネジ部２９ｂを形成し、その後に軸受部材２２及び油圧モータ２３を組み付ける。組付後の各フランジ孔２９ａは軸受部材２２及び油圧モータ２３により完全に閉塞され、且つ各内周側壁２９の外周縁も内輪２４の内周面に対し全周を溶接されているため、機構室３０は外部から気密保持される。   Thus, when the welding operation is completed and the drum main body 21 is completed, the joint surface (inner peripheral surface of the flange hole 29a and its periphery) of each inlay portion of each inner peripheral side wall 29 is machined and the female screw portion 29b is Then, the bearing member 22 and the hydraulic motor 23 are assembled. Since each flange hole 29a after assembly is completely closed by the bearing member 22 and the hydraulic motor 23, and the outer peripheral edge of each inner peripheral side wall 29 is also welded to the inner peripheral surface of the inner ring 24, the mechanism The chamber 30 is kept airtight from the outside.

内部室２７を主体として表現すれば、組付前の内部室２７はガス抜き孔３３、機構室３０及びフランジ孔２９ａを介して外部と連通することにより、上記のような外部へのガス抜き機能を奏するが、組付後の内部室２７はガス抜き孔３３を介して機構室３０とは連通し続けるものの、フランジ孔２９ａの閉塞により外部に対しては遮断されて気密保持される。従って、マカダムローラ１の稼働中に内部室２７や機構室３０の内部に水等が侵入する事態が未然に防止される。   Expressing the internal chamber 27 as a main component, the internal chamber 27 before assembly communicates with the outside through the gas venting hole 33, the mechanism chamber 30, and the flange hole 29a, so that the above-described external gas venting function Although the internal chamber 27 after assembly continues to communicate with the mechanical chamber 30 through the gas venting hole 33, it is shut off from the outside due to the closing of the flange hole 29a and is kept airtight. Therefore, a situation in which water or the like intrudes into the inner chamber 27 or the mechanism chamber 30 while the macadam roller 1 is in operation can be prevented in advance.

そして以上の説明から判るように、特許文献１の注水孔はプラグの装着による封止を要し、従来技術のガス抜き孔３３は鉄片の溶接による封止を要するのに対し、本実施形態のガス抜き孔３３は封止を必要としない。開口状態のままであっても、軸受部材２２及び油圧モータ２３を組み付けた時点で間接的に封止されるためである。従って、プラグを製作する手間或いは鉄片の溶接作業を省略でき、内輪２４にガス抜き孔３３を貫設するだけの極めて簡単な作業により実施可能なことから、その製造コストを大幅に低減することができる。   As can be understood from the above description, the water injection hole of Patent Document 1 requires sealing by attaching a plug, and the gas vent hole 33 of the prior art requires sealing by welding iron pieces, but The degassing holes 33 do not require sealing. Even in the open state, the bearing member 22 and the hydraulic motor 23 are indirectly sealed when assembled. Therefore, it is possible to omit the labor of manufacturing the plug or the welding operation of the iron piece, and it can be implemented by the extremely simple operation of penetrating the degassing hole 33 in the inner ring 24, thereby significantly reducing the manufacturing cost. it can.

また、特許文献１のプラグや従来技術の鉄片が転圧ローラの側壁に露出したままであるのに対し、本実施形態のガス抜き孔３３は、軸受部材２２及び油圧モータ２３の組付後に自ずと外部から隠蔽される。このため、後部転圧ドラム３の外周側壁２６は、見栄えの悪いプラグや鉄片のない平坦状をなし、良好なマカダムローラ１の美観を保つことができる。   Further, while the plug of Patent Document 1 and the iron piece of the prior art remain exposed on the side wall of the pressure roller, the degassing hole 33 of this embodiment is naturally formed after the bearing member 22 and the hydraulic motor 23 are assembled. It is concealed from the outside. For this reason, the outer peripheral side wall 26 of the rear roller compacting drum 3 has a flat shape without a bad-looking plug or piece of iron, and the good appearance of the macadam roller 1 can be maintained.

以上で実施形態の説明を終えるが、本発明の態様はこの実施形態に限定されるものではない。例えば上記実施形態ではマカダムローラ１の後部転圧ドラム３に具体化したが、これに限定されるものではなく、例えば、振動ローラやコンバインドローラの転圧ドラムに適用してもよい。
また転圧車両の中には、転圧ドラムの内部に加振用の起振装置を内蔵した車両も存在するが、このような起振装置を内蔵した転圧ドラムに対しても本発明は適用可能である。
また上記実施形態では、後部車体５から左右両側を支持された後部転圧ドラム３に適用したが、片持ち支持された転圧ドラムに適用してもよい。例えばマカダムローラ１の左側の前部転圧ドラム２は、図２の軸受部材２２を省略して油圧モータ２３（支持・駆動機構）を介して片持ち支持された構成を採っている。しかし、このような構成であっても左側の内周隔壁２９にフランジ孔２９ａ等が形成されておらず、油圧モータ２３の組付後に機構室３０が気密保持されるものであれば、内輪２４にガス抜き孔３３を形成することにより上記実施形態と同様の作用効果が得られる。 Although the description of the embodiment is finished above, the aspect of the present invention is not limited to this embodiment. For example, although the above embodiment is embodied in the rear roller compacting drum 3 of the macadam roller 1, the present invention is not limited to this. For example, the present invention may be applied to a vibrating roller or a roller compactor of a combined roller.
In addition, there are vehicles in which a vibration exciter is built in to the inside of the roller compacting roller among the rolling compacted vehicles, but the present invention is also applicable to a roller compacting drum built in such a vibration exciter. It is applicable.
Further, in the above embodiment, the present invention is applied to the rear roller compacting drum 3 supported on the left and right sides from the rear vehicle body 5, but may be applied to a cantilevered roller compacting drum. For example, the left front roller compacting drum 2 of the macadam roller 1 has a configuration in which the bearing member 22 in FIG. 2 is omitted and supported in a cantilever manner via a hydraulic motor 23 (support / drive mechanism). However, even with such a configuration, if the flange hole 29a etc. is not formed in the inner peripheral partition wall 29 on the left side and the mechanical chamber 30 is airtightly maintained after the assembly of the hydraulic motor 23, the inner ring 24 By forming the degassing holes 33 in the second embodiment, the same function and effect as the above embodiment can be obtained.

１ マカダムローラ（転圧車両）
３ 後部転圧ドラム（転圧ドラム）
２１ ドラム本体
２２ 軸受部材（支持・駆動機構）
２３ 油圧モータ（支持・駆動機構）
２４ 内輪
２５ 外輪
２６ 外周側壁（側壁）
２７ 内部室
２９ 内周側壁（機構室の一側、機構室の他側）
３０ 機構室
３３ ガス抜き孔 1 Macadam Roller (Rolled vehicle)
3 Rear roller drum (roller drum)
21 drum body 22 bearing member (support and drive mechanism)
23 Hydraulic Motor (Support / Drive Mechanism)
24 inner ring 25 outer ring 26 outer peripheral side wall (side wall)
27 inner chamber 29 inner circumferential side wall (one side of mechanism chamber, other side of mechanism chamber)
30 mechanical chamber 33 gas vent

Claims (3)

内外二重に配設された内輪及び外輪の両側がそれぞれ側壁により閉塞されて、前記内輪と前記外輪との間に溶接構造により気密保持された内部室が画成されると共に、前記内輪の内周側に機構室が画成されたドラム本体と、
前記機構室を気密保持し、且つ前記ドラム本体を車体側から支持して回転駆動可能なように、前記機構室に組み付けられた支持・駆動機構と
を備えた転圧車両の転圧ドラムにおいて、
前記内部室と前記機構室とを連通させるガス抜き孔が前記内輪に貫設された
ことを特徴とする転圧車両の転圧ドラム。 The both sides of the inner ring and the outer ring, which are disposed in a double manner, are closed by the side walls to define an inner chamber airtightly maintained by the welded structure between the inner ring and the outer ring, and the inner ring A drum body having a mechanical chamber defined on the circumferential side;
A pressure roller of a roller compacting vehicle, comprising: a support and drive mechanism assembled to the mechanism chamber so as to keep the mechanism chamber airtight and support the drum body from the vehicle body side so as to be rotationally driven.
A pressure roller for a pressure roller, wherein a gas venting hole communicating the inner chamber and the mechanism chamber is formed in the inner ring. 前記支持・駆動機構は、
前記機構室の一側に組み付けられ、該一側を閉塞して前記車体側から支持する軸受部材と、
前記機構室の他側に組み付けられ、該他側を閉塞して前記車体側から支持して回転駆動する油圧モータとから構成された
ことを特徴とする請求項１に記載の転圧車両の転圧ドラム。 The support and drive mechanism is
A bearing member that is assembled to one side of the mechanism chamber, closes the one side, and supports from the vehicle body side;
The rolling bearing according to claim 1, characterized in that it comprises: a hydraulic motor which is assembled on the other side of the mechanical chamber, is closed on the other side, is supported from the vehicle body side, and is rotationally driven. Pressure drum. 前記転圧車両は、マカダムローラであり、
前記転圧ドラムは、前記マカダムローラの後部転圧ドラムである
ことを特徴とする請求項１に記載の転圧車両の転圧ドラム。 The rolling roller is a macadam roller,
The roller compacting drum according to claim 1, wherein the roller compacting drum is a rear roller compacting drum of the macadam roller.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5252307U (en) * 1975-10-14 1977-04-14
JPS6027106U (en) * 1983-07-26 1985-02-23 酒井重工業株式会社 Roll drum structure of self-propelled compaction machine
JPS6036405U (en) * 1983-08-19 1985-03-13 酒井重工業株式会社 Roll drum division of compaction machine
JPH0919768A (en) * 1995-07-06 1997-01-21 Nkk Corp Connection structure of steel frame structure
JP2004232224A (en) * 2003-01-28 2004-08-19 Hitachi Metals Ltd Column leg fixture
JP2008138443A (en) * 2006-12-01 2008-06-19 Hitachi Constr Mach Co Ltd Rolling compaction vehicle
JP2013014984A (en) * 2011-07-06 2013-01-24 Hitachi Constr Mach Co Ltd Compaction roller for vibration roller vehicle, and method of manufacturing the same
JP2013234421A (en) * 2012-05-02 2013-11-21 Hitachi Constr Mach Co Ltd Rolling drum
US20160054471A1 (en) * 2014-08-21 2016-02-25 Caterpillar Paving Products Inc. Use of Wheel Slip to Help Identify Soft Spots

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5252307U (en) * 1975-10-14 1977-04-14
JPS6027106U (en) * 1983-07-26 1985-02-23 酒井重工業株式会社 Roll drum structure of self-propelled compaction machine
JPS6036405U (en) * 1983-08-19 1985-03-13 酒井重工業株式会社 Roll drum division of compaction machine
JPH0919768A (en) * 1995-07-06 1997-01-21 Nkk Corp Connection structure of steel frame structure
JP2004232224A (en) * 2003-01-28 2004-08-19 Hitachi Metals Ltd Column leg fixture
JP2008138443A (en) * 2006-12-01 2008-06-19 Hitachi Constr Mach Co Ltd Rolling compaction vehicle
JP2013014984A (en) * 2011-07-06 2013-01-24 Hitachi Constr Mach Co Ltd Compaction roller for vibration roller vehicle, and method of manufacturing the same
JP2013234421A (en) * 2012-05-02 2013-11-21 Hitachi Constr Mach Co Ltd Rolling drum
US20160054471A1 (en) * 2014-08-21 2016-02-25 Caterpillar Paving Products Inc. Use of Wheel Slip to Help Identify Soft Spots

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