JPH06136791A - Back hoe - Google Patents
Back hoeInfo
- Publication number
- JPH06136791A JPH06136791A JP4283368A JP28336892A JPH06136791A JP H06136791 A JPH06136791 A JP H06136791A JP 4283368 A JP4283368 A JP 4283368A JP 28336892 A JP28336892 A JP 28336892A JP H06136791 A JPH06136791 A JP H06136791A
- Authority
- JP
- Japan
- Prior art keywords
- port
- hydraulic actuator
- rotary joint
- ports
- pressure oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Operation Control Of Excavators (AREA)
- Component Parts Of Construction Machinery (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、左右一対の走行装置を
左右間隔調節可能に備えた機台に縦軸芯周りで回動操作
可能に旋回台を搭載装備するとともに、前記機台に備え
たドーザを昇降操作する昇降操作用油圧アクチュエータ
と、前記走行装置の左右間隔調節用油圧アクチュエータ
とに、前記旋回台側からロータリジョイントを介して圧
油給排するように構成したバックホウに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is equipped with a pair of left and right traveling devices whose left and right distances can be adjusted and which is equipped with a swivel base which can be rotated about a vertical axis. Further, the present invention relates to a backhoe configured to supply and discharge pressure oil from the swivel base side through a rotary joint to a hydraulic actuator for raising and lowering the dozer and a hydraulic actuator for adjusting the left-right distance of the traveling device.
【０００２】[0002]
【従来の技術】従来、この種のバックホウとしては、本
出願人が特願平４−１４１１３９号で示したように、左
右一対の走行装置の左右間隔調節用の油圧アクチュエー
タとドーザ昇降用の油圧アクチュエータとへの圧油給排
油路のロータリジョイントにおける油路数を少なくする
ために、ロータリジョイントと前記両油圧アクチュエー
タとの間に油路切換する切換弁を介装する構造のものが
提案されていた。2. Description of the Related Art Conventionally, as a backhoe of this type, as shown in Japanese Patent Application No. 4-141139 by the present applicant, a hydraulic actuator for adjusting the left-right distance between a pair of right and left traveling devices and a hydraulic actuator for raising and lowering a dozer. In order to reduce the number of oil passages in the rotary joint of the pressure oil supply / exhaust oil passage to the actuator, there has been proposed a structure in which a switching valve for switching the oil passage is interposed between the rotary joint and the hydraulic actuators. Was there.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記構
造のものにあっては、ロータリジョイントにおける油路
数を減少させることができるものの、切換弁は走行装置
を備えた機台がわに設置されるので、機台に対して旋回
駆動される旋回台がわからその切換弁を操作しようとす
ると、旋回台が機台に対して一定姿勢となった状態でし
か操作できないとともに、旋回台の操作部材と切換弁と
を連係する操作系を、旋回台と機台とにわたって設ける
ので構造複雑になり易いものであった。本発明は、上記
実情に鑑みてなされたものであって、ドーザを昇降操作
する昇降操作用油圧アクチュエータと、走行装置の左右
間隔調節用油圧アクチュエータとに対するロータリジョ
イントにおける油路数を少なくしながらも、それら油圧
アクチュエータへの油路切換する切換弁の操作系構造を
簡単なものにできるバックホウの提供を目的とする。However, in the structure described above, although the number of oil passages in the rotary joint can be reduced, the switching valve is installed on the machine base equipped with the traveling device. Therefore, when trying to operate the switching valve of the swivel base that is swivel-driven with respect to the machine base, the switch can be operated only in a state in which the swivel base has a fixed posture with respect to the machine base. Since the operation system that links the switching valve is provided over the swivel base and the machine base, the structure tends to be complicated. The present invention has been made in view of the above circumstances, and while reducing the number of oil passages in a rotary joint for a hydraulic actuator for lifting and lowering a dozer and a hydraulic actuator for adjusting the left-right distance of a traveling device, An object of the present invention is to provide a backhoe capable of simplifying the operation system structure of a switching valve for switching an oil passage to those hydraulic actuators.
【０００４】[0004]
【課題を解決するための手段】本発明にかかるバックホ
ウは、上記目的を達成するために、冒記構造のものにお
いて、前記旋回台がわに設けた３ポート２位置切換弁の
２次側ポートの２つのポートのうちの一方と、前記昇降
操作用油圧アクチュエータの一方の圧油給排ポートとを
前記ロータリジョイントを介して接続するとともに、前
記３ポート２位置切換弁の２次側ポートの２つのポート
のうちの他方と、前記左右間隔調節用油圧アクチュエー
タの一方の圧油給排ポートとを前記ロータリジョイント
を介して接続し、かつ、前記３ポート２位置切換弁の１
次側ポートと、主制御弁の２次側ポートの２つのポート
のうちの一方とを接続し、かつ、前記昇降操作用油圧ア
クチュエータの他方の圧油給排ポートと前記左右間隔調
節用油圧アクチュエータの他方の圧油給排ポートとを共
に接続した状態で前記ロータリジョイントを介して前記
主制御弁の２次側ポートの２つのポートのうちの他方に
接続してあることを特徴構成とする。かかる特徴構成に
よる作用・効果は次の通りである。In order to achieve the above object, the backhoe according to the present invention has the structure described above, and has a secondary port of a three-port two-position switching valve in which the swivel base is provided on the crocodile. One of the two ports of the three-port two-position switching valve is connected to one of the pressure oil supply / discharge ports of the lifting / lowering hydraulic actuator via the rotary joint. The other of the two ports and one of the pressure oil supply / discharge ports of the hydraulic actuator for adjusting the left / right spacing are connected via the rotary joint, and the one of the three-port two-position switching valve is connected.
The secondary side port and one of the two ports of the secondary side port of the main control valve are connected, and the other hydraulic oil supply / discharge port of the lifting / lowering hydraulic actuator and the hydraulic actuator for adjusting the horizontal gap. Is connected to the other of the two ports of the secondary side port of the main control valve through the rotary joint in a state where the other pressure oil supply / discharge port is also connected. The operation and effect of this characteristic configuration are as follows.
【０００５】[0005]
【作用】即ち、３ポート２位置切換弁の２位置を選択し
て切り換えることで、その２次側ポートの一方と昇降操
作用油圧アクチュエータの一方の圧油給排ポートとが接
続される状態と、その２次側ポートの他方と左右間隔調
節用油圧アクチュエータの一方の圧油給排ポートとが接
続される状態とに選択して切り換えて、どちらかの油圧
アクチュエータのみ駆動可能にできるとともに、そのよ
うに、選択したものを、主制御弁からの圧油給排によ
り、３ポート２位置切換弁を介して圧油を油圧アクチュ
エータがわに供給する状態と、３ポート２位置切換弁を
介して圧油を戻す状態との選択切換することで、前記各
油圧アクチュエータの駆動向きを選択することができ
る。そして、昇降操作用油圧アクチュエータ並びに左右
間隔調節用油圧アクチュエータを駆動するためにロータ
リジョイントに形成する油路数は、各油圧アクチュエー
タと３ポート２位置切換弁の２次側ポートとをそれぞれ
接続する２つの油路と、各油圧アクチュエータの他方の
圧油給排ポート同士を共に接続した油路と主制御弁の２
次側ポートの１つとを接続する１つの油路との３つであ
る。That is, by selecting and switching between the two positions of the three-port two-position switching valve, one of the secondary side ports and one of the pressure oil supply / discharge ports of the lifting operation hydraulic actuator are connected. , A state in which the other of the secondary side ports and one of the hydraulic oil supply / discharge ports of the hydraulic actuator for adjusting the left / right spacing are connected to each other to make it possible to drive only one of the hydraulic actuators. As described above, the selected one is supplied with pressure oil from the main control valve and supplied with pressure oil through the 3-port 2-position switching valve to the hydraulic actuator and the 3-port 2-position switching valve is operated. The drive direction of each of the hydraulic actuators can be selected by selectively switching the state in which the pressure oil is returned. The number of oil passages formed in the rotary joint for driving the lifting operation hydraulic actuator and the horizontal gap adjusting hydraulic actuator is 2 for connecting each hydraulic actuator and the secondary port of the 3-port 2-position switching valve. Two oil passages, an oil passage connecting the other pressure oil supply / discharge ports of each hydraulic actuator together, and a main control valve
One oil passage connecting with one of the secondary ports and three.
【０００６】[0006]
【発明の効果】従って、３ポート２位置切換弁と主制御
弁とにおける油路切換によって、各油圧アクチュエータ
を適宜選択して任意の向きに駆動操作することができる
から、左右の走行装置間の間隔調節とドーザの昇降操作
とを適宜に行うことができながらも、ロータリジョイン
トと主制御弁との間に３ポート２位置切換弁があるか
ら、この３ポート２位置切換弁も旋回台がわに配設され
ることとなり、その操作系の設置も簡単なもので済み、
上記調節や操作が旋回台の機台に対する姿勢に影響され
ないものとなり、扱い易いものとなるに至った。更に、
ロータリジョイントにおける油路数も少なくできて、ロ
ータリジョイントの加工等の手間も少なく安価にでき
る。Therefore, by switching the oil passages in the 3-port 2-position switching valve and the main control valve, each hydraulic actuator can be appropriately selected and driven and operated in any direction. Although the interval can be adjusted and the dozer lifting operation can be appropriately performed, since there is a 3-port 2-position switching valve between the rotary joint and the main control valve, this 3-port 2-position switching valve also has a swivel base. It will be installed in, and the operation system can be installed easily.
The above adjustments and operations are not affected by the attitude of the swivel base with respect to the machine base, and are easy to handle. Furthermore,
The number of oil passages in the rotary joint can be reduced, and the labor for machining the rotary joint can be reduced and the cost can be reduced.
【０００７】[0007]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。図３に、バックホウを示している。このバックホ
ウは、左右一対の走行装置としてのクローラ走行装置
１，１とドーザ２とを備えた機台３に、縦軸芯周りで旋
回自在に旋回台４を設けるとともに、この旋回台４に、
運転部５、原動部６及びバックホウ作業装置７を装備し
て構成している。Embodiments of the present invention will be described below with reference to the drawings. The backhoe is shown in FIG. This backhoe is provided with a swivel base 4 that is rotatable about a vertical axis center on a machine base 3 provided with a crawler traveling device 1, 1 as a pair of left and right traveling devices and a dozer 2.
It is configured by being equipped with a driving unit 5, a driving unit 6, and a backhoe working device 7.
【０００８】そして、図２に示すように、機台３に機体
横方向に沿った状態のパイプフレームで形成した前後一
対の支持ガイド部８を配設するとともに、これら支持ガ
イド部８，８に左右外側から横方向に摺動案内可能に嵌
合した状態の取付フレーム９‥をそれぞれ左右一対の前
記クローラ走行装置１，１のトラックフレーム１０，１
０の前後に連結している。各トラックフレーム１０と機
台３との間には、左右間隔調節用油圧アクチュエータと
しての片ロッド型の左右間隔調節用油圧シリンダ１１を
架設している。一方、前記ドーザ２は機台３に軸支した
アーム２Ａ，２Ａで支持され、機台３に連設した昇降用
油圧アクチュエータとしての昇降操作用油圧シリンダ１
２で昇降操作される。As shown in FIG. 2, a pair of front and rear support guide portions 8 formed of a pipe frame in the lateral direction of the machine body are arranged on the machine base 3, and these support guide portions 8, 8 are provided. A pair of left and right track frames 10, 1 of the crawler traveling devices 1, 1 are attached to the mounting frames 9 ...
It is connected before and after 0. Between each track frame 10 and the machine base 3, a single rod type left-right gap adjusting hydraulic cylinder 11 is installed as a left-right gap adjusting hydraulic actuator. On the other hand, the dozer 2 is supported by arms 2A and 2A pivotally supported on the machine base 3, and a lifting operation hydraulic cylinder 1 as a lifting hydraulic actuator that is connected to the machine base 3 is provided.
The elevator is operated at 2.
【０００９】図１に示すように、旋回台４の原動部６の
油圧ポンプ１３から機台３がわへ圧油給排するためのロ
ータリジョイント１４と、油圧ポンプ１３との間の油路
には、多連弁で構成される主制御弁１５と３ポート２位
置切換弁で構成される油路切換弁１６とを介装してい
る。そして、主制御弁１５はセンターバイパス式制御弁
（図ではセンターバイパスや多連の他の弁を省略してあ
る）であって、センターバイパス用のポートも含めて６
ポート３位置切換弁で構成している。この主制御弁１５
の２次側ポートのうちの一方と、油路切換弁１６の１次
側ポートとを油路１７で接続しているとともに、油路切
換弁１６の２次側ポートの２つのポートのうちの一方
と、昇降操作用油圧シリンダ１２の一方の圧油給排ポー
トとを油路１８で接続しており、油路切換弁１６の２次
側ポートの２つのポートのうちの他方と、左右間隔調節
用油圧シリンダ１１の一方の圧油給排ポートとを油路１
９で接続している。油路１８及び油路１９は、ロータリ
ジョイント１４にもそれぞれ形成されている。又、左右
間隔調節用油圧シリンダ１１の他方の圧油給排ポートと
昇降操作用油圧シリンダ１２の他方の圧油給排ポートの
それぞれに接続された油路２０，２１を共に接続してお
り、主切換弁１５の２次側ポートのうちの他方に接続さ
れ、かつロータリジョイント１４に形成した油路２２
と、油路２０，２１とが接続されている。As shown in FIG. 1, an oil passage between the hydraulic pump 13 and the rotary joint 14 for supplying / discharging pressure oil from the hydraulic pump 13 of the driving portion 6 of the swivel 4 to the machine base 3 is provided. Is provided with a main control valve 15 composed of multiple valves and an oil passage switching valve 16 composed of a 3-port 2-position switching valve. The main control valve 15 is a center bypass type control valve (in the figure, the center bypass and other multiple valves are omitted), including the center bypass port.
It consists of a port 3 position switching valve. This main control valve 15
One of the secondary side ports of the oil passage switching valve 16 and the primary side port of the oil passage switching valve 16 are connected by the oil passage 17, and at least one of the two secondary side ports of the oil passage switching valve 16 is connected. One side and one pressure oil supply / discharge port of the lifting operation hydraulic cylinder 12 are connected by an oil passage 18, and the other of the two secondary side ports of the oil passage switching valve 16 is separated from the left / right space. One of the pressure oil supply / discharge ports of the adjusting hydraulic cylinder 11 is connected to the oil passage 1.
Connected with 9. The oil passage 18 and the oil passage 19 are also formed in the rotary joint 14, respectively. Further, the oil passages 20 and 21 respectively connected to the other pressure oil supply / discharge port of the left / right spacing hydraulic cylinder 11 and the other pressure oil supply / discharge port of the lifting operation hydraulic cylinder 12 are connected together. An oil passage 22 connected to the other of the secondary side ports of the main switching valve 15 and formed in the rotary joint 14.
And the oil passages 20 and 21 are connected.
【００１０】上記構成により、左右間隔調節用油圧シリ
ンダ１１と昇降操作用油圧シリンダ１２とに対して圧油
給排するためにロータリジョイント１４に形成される油
路は３本で済むとともに、左右間隔調節用油圧シリンダ
１１と昇降操作用油圧シリンダ１２とを選択して伸縮操
作するための圧油給排油路を切換するバルブとしての油
路切換弁１６も主制御弁１５も旋回台４がわに設置され
ることになるので、油路切換弁１６や主制御弁１５を操
作するための操作系も旋回台４がわに配設されることに
なる。尚、ドーザ２の昇降操作と、クローラ走行装置
１，１の左右間隔調節操作との選択は油路切換弁１６で
行い、昇降操作用油圧シリンダ１２又は左右間隔調節用
油圧シリンダ１１の伸長操作と短縮操作との選択は主制
御弁１５で行う。With the above structure, three oil passages are formed in the rotary joint 14 for supplying / discharging pressure oil to / from the hydraulic cylinder 11 for adjusting the left / right distance and the hydraulic cylinder 12 for raising / lowering operation. The oil passage switching valve 16 as the valve for switching the pressure oil supply / discharge oil passage for selecting the adjustment hydraulic cylinder 11 and the lifting operation hydraulic cylinder 12 to perform expansion / contraction operation, the main control valve 15, the swivel base 4, and the swivel base 4. Therefore, the swivel base 4 is also provided in the crocodile for the operation system for operating the oil passage switching valve 16 and the main control valve 15. The oil passage switching valve 16 is used to select between the raising / lowering operation of the dozer 2 and the left / right spacing adjusting operation of the crawler traveling devices 1 and 1, and the operation of extending the lifting / lowering operation hydraulic cylinder 12 or the left / right spacing adjusting hydraulic cylinder 11. The selection of the shortening operation is performed by the main control valve 15.
【００１１】本発明は、次のように実施しても良い。 （イ）図４に示すように、左右間隔調節用油圧シリンダ
１１への油路２０にパイロット操作式逆止弁２３を介装
し、それのパイロット油路２４を油路１９に接続するこ
とにより、左右間隔調節用油圧シリンダ１１を短縮させ
るために油路１９に供給圧が与えられることでパイロッ
ト操作されて、逆止弁２３が開いて左右間隔調節用シリ
ンダ１１の伸長がわ油室から油がオイルタンクがわに戻
るように構成すること。 （ロ）上記実施例では、左右間隔調節用油圧シリンダ１
１の伸長操作用油室に接続された油路２０と昇降操作用
油圧シリンダ１２の短縮操作用油室に接続された油路１
９とを接続しているが、昇降操作用油圧シリンダ１２の
短縮操作用油室とロータリジョイント１４を介して油路
切換弁１６の２次側ポートとを油路接続し、昇降操作用
油圧シリンダ１２の伸長操作用油室に接続された油路
を、左右間隔調節用油圧シリンダ１１の伸長操作用油室
に接続された油路２０に接続すること。The present invention may be implemented as follows. (A) As shown in FIG. 4, the pilot-operated check valve 23 is provided in the oil passage 20 to the hydraulic cylinder 11 for adjusting the left-right space, and the pilot oil passage 24 is connected to the oil passage 19. When the supply pressure is applied to the oil passage 19 to shorten the left-right distance adjusting hydraulic cylinder 11, the pilot valve is operated, the check valve 23 is opened, and the left-right distance adjusting cylinder 11 is extended from the oil chamber. Should be configured so that the oil tank returns to the trap. (B) In the above-described embodiment, the hydraulic cylinder 1 for adjusting the left-right spacing is used.
Oil passage 20 connected to the extension operation oil chamber 1 and oil passage 1 connected to the shortening operation oil chamber of the lifting operation hydraulic cylinder 12
9 is connected, but the shortening operation oil chamber of the lifting operation hydraulic cylinder 12 is connected to the secondary port of the oil path switching valve 16 via the rotary joint 14, and the lifting operation hydraulic cylinder is connected. The oil passage connected to the extension operation oil chamber 12 is connected to the oil passage 20 connected to the extension operation oil chamber of the left-right interval adjusting hydraulic cylinder 11.
【００１２】尚、特許請求の範囲の項に図面との対照を
便利にするために符号を記すが、該記入により本発明は
添付図面の構成に限定されるものではない。It should be noted that although reference numerals are given in the claims for convenience of comparison with the drawings, the present invention is not limited to the configurations of the accompanying drawings by the entry.
【図１】ドーザ昇降用と走行装置の間隔調節用の各油圧
シリンダへの圧油給排用油圧回路を示す回路図FIG. 1 is a circuit diagram showing a hydraulic circuit for supplying / discharging pressure oil to / from each hydraulic cylinder for raising and lowering a dozer and for adjusting a gap between traveling devices.
【図２】ドーザ昇降用と走行装置の間隔調節用の各油圧
シリンダ、機台、ロータリジョイント及びクローラ走行
装置を示す横断平面図FIG. 2 is a cross-sectional plan view showing respective hydraulic cylinders for raising and lowering a dozer and for adjusting a distance between traveling devices, a machine base, a rotary joint, and a crawler traveling device.
【図３】バックホウを示す全体側面図FIG. 3 is an overall side view showing a backhoe.
【図４】別実施例のドーザ昇降用と走行装置の間隔調節
用の各油圧シリンダへの圧油給排用油圧回路を示す回路
図FIG. 4 is a circuit diagram showing a hydraulic circuit for supplying / discharging pressure oil to / from hydraulic cylinders for lifting and lowering a dozer and for adjusting a distance between traveling devices according to another embodiment.
１ 走行装置 ２ ドーザ ３ 機台 ４ 旋回台 １１ 左右間隔調節用油圧アクチュエータ １２ 昇降押作用油圧アクチュエータ １４ ロータリジョイント １５ 主制御弁 １６ ３ポート２位置切換弁 DESCRIPTION OF SYMBOLS 1 Traveling device 2 Dozer 3 Machine stand 4 Swing platform 11 Hydraulic actuator for adjusting the horizontal distance 12 Hydraulic actuator for lifting and lowering action 14 Rotary joint 15 Main control valve 16 3 Port 2 position switching valve
Claims (1)
右間隔調節可能に備えた機台（３）に縦軸芯周りで回動
操作可能に旋回台（４）を搭載装備するとともに、前記
機台（３）に備えたドーザ（２）を昇降操作する昇降操
作用油圧アクチュエータ（１２）と、前記走行装置
（１），（１）の左右間隔調節用油圧アクチュエータ
（１１）とに、前記旋回台（４）側からロータリジョイ
ント（１４）を介して圧油給排するように構成したバッ
クホウであって、前記旋回台（４）がわに設けた３ポー
ト２位置切換弁（１６）の２次側ポートの２つのポート
のうちの一方と、前記昇降操作用油圧アクチュエータ
（１２）の一方の圧油給排ポートとを前記ロータリジョ
イント（１４）を介して接続するとともに、前記３ポー
ト２位置切換弁（１６）の２次側ポートの２つのポート
のうちの他方と、前記左右間隔調節用油圧アクチュエー
タ（１１）の一方の圧油給排ポートとを前記ロータリジ
ョイント（１４）を介して接続し、かつ、前記３ポート
２位置切換弁（１６）の１次側ポートと、主制御弁（１
５）の２次側ポートの２つのポートのうちの一方とを接
続し、かつ、前記昇降操作用油圧アクチュエータ（１
２）の他方の圧油給排ポートと前記左右間隔調節用油圧
アクチュエータ（１１）の他方の圧油給排ポートとを共
に接続した状態で前記ロータリジョイント（１４）を介
して前記主制御弁（１５）の２次側ポートの２つのポー
トのうちの他方に接続してあるバックホウ。1. A machine base (3) equipped with a pair of left and right traveling devices (1), (1) whose left and right spaces can be adjusted, and which is equipped with a swivel base (4) capable of rotating about a longitudinal axis. At the same time, a lifting / lowering hydraulic actuator (12) for lifting / lowering the dozer (2) provided on the machine base (3), and a hydraulic actuator (11) for adjusting the horizontal distance between the traveling devices (1) and (1). A backhoe configured to supply and discharge pressure oil from the swivel base (4) side through a rotary joint (14), wherein the swivel base (4) has a three-port two-position switching valve ( One of the two secondary side ports of 16) and one pressure oil supply / discharge port of the lifting / lowering hydraulic actuator (12) are connected via the rotary joint (14), and 2 of 3 port 2 position switching valve (16) The other of the two ports of the secondary port and one of the pressure oil supply / discharge ports of the hydraulic actuator (11) for adjusting the left / right spacing are connected via the rotary joint (14), and the three ports are connected. The primary side port of the 2-position switching valve (16) and the main control valve (1
5) is connected to one of the two ports of the secondary side port, and the lifting hydraulic actuator (1
In the state where the other pressure oil supply / discharge port of 2) and the other pressure oil supply / discharge port of the left / right gap adjusting hydraulic actuator (11) are both connected, the main control valve (via the rotary joint (14)). A backhoe connected to the other of the two secondary side ports of 15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4283368A JP2815766B2 (en) | 1992-10-22 | 1992-10-22 | Backhoe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4283368A JP2815766B2 (en) | 1992-10-22 | 1992-10-22 | Backhoe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06136791A true JPH06136791A (en) | 1994-05-17 |
| JP2815766B2 JP2815766B2 (en) | 1998-10-27 |
Family
ID=17664595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4283368A Expired - Lifetime JP2815766B2 (en) | 1992-10-22 | 1992-10-22 | Backhoe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2815766B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3119056U (en) * | 2005-11-01 | 2006-02-16 | 株式会社松栄堂 | Incense burner |
-
1992
- 1992-10-22 JP JP4283368A patent/JP2815766B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3119056U (en) * | 2005-11-01 | 2006-02-16 | 株式会社松栄堂 | Incense burner |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2815766B2 (en) | 1998-10-27 |
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