摘要:
A first member includes a first fixing portion on which a sheet edge is fixed, a holder continuous with an end of the first fixing portion, a first recess that is defined in the holder and has an opening in a continuous direction of the first fixing portion, and a support portion that is formed opposite the first fixing portion across the opening of the first recess of the holder. A second member includes a second fixing portion on which the other sheet edge is fixed, a held portion continuous with an end of the second fixing portion. When the held portion is inserted into the first recess, the support portion is brought into contact with a surface of the second fixing portion.
摘要:
A first member includes a first fixing portion on which a sheet edge is fixed, a holder continuous with an end of the first fixing portion, a first recess that is defined in the holder and has an opening in a continuous direction of the first fixing portion, and a support portion that is formed opposite the first fixing portion across the opening of the first recess of the holder. A second member includes a second fixing portion on which the other sheet edge is fixed, a held portion continuous with an end of the second fixing portion. When the held portion is inserted into the first recess, the support portion is brought into contact with a surface of the second fixing portion.
摘要:
An energy recovery control circuit is provided with an energy recovery system for recovering energy of a work equipment. The energy recovery control circuit includes an recovery control valve block in which a plurality of valves that constitute the energy recovery system are incorporated. The recovery control valve block includes a main spool, in which a plurality of control characteristics concerning recovery of energy are consolidated.
摘要:
The present invention is intended to provide a technology that can utilize the advantages of both a load sensing control and a regeneration circuit without causing any problem.A regeneration circuit is added to a hydraulic circuit provided with a hydraulic pressure signal line for detecting a hydraulic pressure value of a circuit and controlling a volume of hydraulic fluid to a cylinder 1 with reference to the detected value. A pressure reducing valve 6 that outputs a reduced pressure as an operating signal to a pump 2, and subsequently the controlling means 5 causes the pressure reducing valve 6 to output a pressure reduction command to a pump 2 and thus to reduce a discharge rate from the pump 2, when the regeneration circuit is in a regeneration state.
摘要:
A method of controlling an electro-hydraulic system having an engine driving a variable displacement pump, a hydraulic valve and a hydraulic actuator in order to achieve more efficient engine operation is disclosed. The pressures in the electro-hydraulic system are monitored and commands are received indicating the desired movement of the hydraulic actuator. Based on the pressure and the commands, the operation being performed by the machine is determined and the engine is set to an efficient setting for the particular segment of machine operation.
摘要:
A hydraulic control circuit for a boom cylinder in a work machine, which, when controlling supply and discharge of pressurized oil with respect to a boom cylinder, improves fuel efficiency, work efficiency in combined operations, and improves work efficiency and operationality in the work of difficult boom operations, such as debris raking-up work and bumping work, wherein the hydraulic control circuit of a boom cylinder is provided with a change valve to hold a first boom control valve at a neutral position, a communication line for causing a head side oil chamber and a rod side oil chamber to communicate with each other, an opening valve for opening and closing the corresponding communication line, and pilot operating check valve that is changed to an unidirectional state where, although an oil flow from the head side oil chamber to the rod side oil chamber is permitted, a reverse flow is hindered, and to a bi-directional state where oil flows in both directions, and further a second boom control valve is provided with discharge means for causing oil discharged from the head side oil chamber to flow into an oil reservoir.
摘要:
A pilot-operated proportional control electromagnetic relief valve has a needle guide portion snugly fitted around the outer surface of a needle. The needle guide portion guides vertical movement of the needle, and is located at the center of a stopper so as to be coaxial with the stopper. A cylindrical inner wall portion of the stopper is so bored in the lower part of the adapter as to be coaxial with the needle guide portion. A cylindrical outer wall portion to be snugly fitted in the cylindrical inner positioning wall portion is so formed around the outer surface of a seat as to be coaxial with the seat portion. The outer circumferential surface of the needle is snugly fitted in the needle guide portion of the adapter so that the needle guide portion guides the axial travel of the needle, and the cylindrical inner wall portion of the adapter and the cylindrical outer wall portion of the seat are snugly fitted together. The needle can therefore be properly seated without the danger of the needle being in off-center contact with the seat portion.
摘要:
A fastener attached product is structured such that a slide fastener is sewn to right and left attached bodies which are bent in a U-shape, and the right and left attached bodies are arranged in a tape surface side to which the element rows of the fastener tape are sewn. Further, the right and left attached bodies come into contact with the outer surfaces of right and left flanges which are arranged in a slider, and the element rows are arranged and exposed between the right and left attached bodies. As a result of this configuration, since the fastener tape is invisible from the outside by the attached body, exposing the element rows can provide the fastener attached product with different design from conventional products and eliminate problems due to degradation in the appearance and design which is caused by the exposure of the fastener tapes.
摘要:
A method of sewing a fastener stringer includes the steps of conveying a fastener stringer and an attached body to a sewing section of a sewing machine in a state with the fastener stringer superposed on the attached body, and arranging an element guide section in the sewing section of the sewing machine, bending a fastener tape in a direction in which a tape bent section opens, guiding the element rows to the element guide section and sewing the fastener tape to the attached body. Accordingly, the method enables a sewing line formed by a sewing thread to be disposed at a predetermined position and the fastener tape and the attached body to be easily and efficiently sewn together.
摘要:
A method of controlling an electro-hydraulic system having an engine driving a variable displacement pump, a hydraulic valve and a hydraulic actuator in order to achieve more efficient engine operation is disclosed. The pressures in the electro-hydraulic system are monitored and commands are received indicating the desired movement of the hydraulic actuator. Based on the pressure and the commands, the operation being performed by the machine is determined and the engine is set to an efficient setting for the particular segment of machine operation.