摘要:
A boom control valve and a pulsation absorption control valve are provided in the halfway point of a center bypass line. The pulsation absorption control valve is arranged in a position downstream of the boom control valve. The pulsation absorption control valve is switched to a blockade position and a communication position by a pilot pressure from a remote control valve. The pulsation absorption control valve is constituted such that one main line out of a pair of main lines is communicated with or blocked off from an accumulator via one communication line and the other main line is communicated with or blocked off from the side of a tank via the other communication line. The accumulator is operated as a dynamic damper at the traveling of a vehicle. This arrangement enables the construction of the communication line to be simplified, thus improving operability at assembling.
摘要:
A boom control valve and a pulsation absorption control valve are provided in the halfway point of a center bypass line. The pulsation absorption control valve is arranged in a position downstream of the boom control valve. The pulsation absorption control valve is switched to a blockade position and a communication position by a pilot pressure from a remote control valve. The pulsation absorption control valve is constituted such that one main line out of a pair of main lines is communicated with or blocked off from an accumulator via one communication line and the other main line is communicated with or blocked off from the side of a tank via the other communication line. The accumulator is operated as a dynamic damper at the traveling of a vehicle. This arrangement enables the construction of the communication line to be simplified, thus improving operability at assembling.
摘要:
A hydraulic ride control system for a working vehicle such as a wheel loader is provided with boom cylinders, an actuator control valve for controlling a pressure in bottom pressure chambers of the boom cylinders, an accumulator connected to the bottom pressure chambers of the boom cylinders via a connection line, an opening control valve having a pilot chamber to selectively communicating or cutting off the connection line depending on a pressure in the pilot chamber, and a selector unit for selectively feeding a pressure to or draining a pressure from the pilot chamber. The selector unit comprises a controller for variably controlling an opening of the opening control valve.
摘要:
A hydraulic ride control system for a working vehicle such as a wheel loader is provided with boom cylinders, an actuator control valve for controlling a pressure in bottom pressure chambers of the boom cylinders, an accumulator connected to the bottom pressure chambers of the boom cylinders via a connection line, an opening control valve having a pilot chamber to selectively communicating or cutting off the connection line depending on a pressure in the pilot chamber, and a selector unit for selectively feeding a pressure to or draining a pressure from the pilot chamber. The selector unit comprises a controller for variably controlling an opening of the opening control valve.
摘要:
A plurality of directional control valves are included in a valve main body 1. Each of the directional control valves is provided with a spool 2, actuator ports 3,4, a communication passage 7, a parallel passage 6, a tandem passage 5, a first check valve 8 for permitting a flow of pressure fluid from the parallel passage 6 toward the communication passage 7, and a second check valve 9 for permitting a flow of pressure fluid from the tandem passage 5 toward the communication passage 7. For example, the first check valve 8 is slidably arranged in the second check valve 9, the second check valve 9 is provided with a through-hole 14 formed in communication with the communication passage 7, and a plug 11 is arranged in threaded engagement with the valve main body 1 such that an end portion of the first check valve 8 and an end portion of the second check valve 9 are covered by the plug 11.
摘要:
An object moves along a predetermined route adjacent a pair of inductive radio lines crossed at two predetermined intervals P.sub.1 and P.sub.2. A sensing device on the object senses the intervals and enables generation of an object position signal having a first code value when the interval P.sub.1 is sensed and a second code value when the interval P.sub.2 is sensed.
摘要:
On a display window that displays code patterns that are read at a time, a code reading device allows the code pattern that is successfully decoded to be visually confirmed with ease. In a handy terminal, when an image scanner reads code patterns at a time in response to a trigger operation, a CPU performs decoding processes for each code pattern and determines whether the decoding processes have been successfully completed or not based on the decoding results so as to display an identifying mark indicating the determination result in association with the image of each code pattern.
摘要:
In a thick multilayered wiring board, a coaxial signal wiring pattern is surrounded by upper and lower horizontal grounded conductive layers and vertical grounded conductive layers and the vertical conductive layers of conductive layers which surround the coaxial signal wiring pattern are formed in a photosensitive dielectric layer by a photolithography, whereby matching of characteristic impedance of the pattern is improved and thus crosstalk is reduced.
摘要:
A composition comprising an amorphous resin (excluding polyphenylene ether) and a specific diamide compound of the formula ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are defined in the specification. The moldability of the amorphous resin is improved without reducing its heat resistance.
摘要:
A coin packaging apparatus facilitates a change operation of the type of coins processed, can correspond to any type of coin, and is an apparatus which feeds coins one by one from a circular plate and conveys them along a coin passage and in which required processing, such as totaling and separation of the coins to be packaged, is performed. The coins are fed to a coin stacking portion where a required number of coins are stacked and packaged by a coin packaging portion. A coin passage width adjustment device steplessly adjusts the width of the coin passage, a coin passage height adjustment device steplessly adjusts the height of the coin passage, and a coin stacking portion inner diameter adjustment device steplessly adjusts the inner diameter of the coin stacking portion. A coin information input portion receives coin information, including at least the diameter and thickness of coins to be proposed. A coin information coin passage width information P.sub.1 and the coin storage portion stores coin information of at least the diameter and thickness of coins to be processed in correspondence with the type of coin. A coin type specification portion specifies the type of coin to be processed, and a control unit determines the inner diameter of a coin stacking portion and the height and width of a coin passage portion from coin information from the coin information storage portion and on the basis of the coin type from the coin type specification means, and operates each of the adjustment portion to those determined dimensions.