Smc Corporation

Takashi Akimoto

Masamichi Tajima

Hiroyuki Katsuta

Kazuo Hiramatsu

Makoto Ishikawa

The present invention includes a terminal block accommodation chamber formed in a sub-plate, a cover member detachably mounted on the opening of the terminal block accommodation chamber, and a terminal block that is formed integrally with the cover member and that is loaded in and unloaded from the terminal block accommodation chamber by installing and removing the cover member. The terminal block has a plurality of feeding terminals to which leads drawn through an introduction port in the cover member are connected. A plurality of plug-shaped contact shoes for electric connection are attached to the respective terminals. Socket-shaped contact shoes leading to the solenoid valve are provided in a first connector installed inside the terminal block accommodation chamber. When the solenoid is inserted into the accommodation chamber, the contact shoes of the terminal block are connected to the contact shoes of the first connector.

Wire connection apparatus for solenoid-operated valves

To obtain a base-mounted electromagnetic valve, wherein removal and mounting of a pilot valve of the electromagnetic valve is facilitated to allow its assembly, maintenance and the like to be carried out easily simply by incorporating a simple power supply mechanism between a base member and the electromagnetic valve. In order to achieve this object, a recessed portion disposed on a joint surface with a pilot valve and a fit-in portion capable of fitting into a recess wherein power supply sockets of the base member are formed are provided in an intermediate block which separably connects a main valve portion of the electromagnetic valve with a pilot valve portion, and a relay connector which separably connects lead-in terminals of said pilot valve portion with the power supply sockets of the base member is provided within said recessed portion.

Base-mounted electromagnetic valve

Solenoid-operated pilot valve

End plate for manifold for solenoid-operated directional control valve

Pressure controlling valve mounted in such a manner as to be directly inserted between a change valve and a base and which has a valve body which is substantially equal to the change valve in width. In the valve body, there are provided a plurality of communication channels that communicate the corresponding ports of the change valve and base, a pressure control valve port that crosses those channels, a pressure control valve stem inserted in the port, and a controlling mechanism which are under a set pressure in cooperative action with the stem. The channels to guide pressure fluid for controlling pressure include a lead port inside the pressure controlling valve step and a lead clearance in the outer region of pressure controlling valve stem.

Pressure controlling valve to be attached to a base-mounted change valve

An internal pilot channel branching from a supply port, an external pilot channel leading to an external pilot port, and a pilot input channel for guiding a pilot fluid to a pilot valve are opened in parallel on a channel-switching surface formed in a body. A channel-switching plate having a dent large enough to extend across the openings of two adjacent channels is mounted on the channel-switching surface in such a way that its direction can be changed by 180.degree..

Pilot-operated directional control valve

A three-position switching valve has a spool positioned in a valve hole that is moved relative to two drive chambers positioned on either end of the valve hole. Solenoid-controlled pilot valves are provided to control supplying and ejecting a pilot fluid to and from the two respective drive chambers. This spool is held at a neutral position by the provision of two piston chambers being formed adjacent to each of the drive chambers and constantly receiving pilot fluid through a channel, the piston chambers each having a smaller diameter than that of the drive chambers. Each piston chamber accommodates a piston which may slidably move so as to be urged by pilot fluid toward the spool and a linking member interposed between each of the pistons and the spool. A return spring is interposed between each of the pistons and each linking member as part of the structure holding the spools at the neutral position.

Solenoid-controlled pilot-operated three-position switching valve

A packing mounting groove formed in a spool has a wider portion of a large groove width and a narrower portion of a small groove width, and a packing that is mounted in the packing mounting groove has a first portion that fits in the wider portion and a second portion that fits in the narrower portion. A plurality of fixing protrusions formed concentrically on both sides of the second portion are pressure-contacted with a groove wall of the narrower portion to fixedly mount the packing in the mounting groove.

Spool

It is an object of this invention to reduce air resistance, which occurs when a packing is mounted in the mounting groove of a spool. Reducing this air resistance facilitates the mounting operation and prevents compressed air from being contained in a groove bottom space, and thus prevents the packing from floating. To achieve this object, a packing mounting groove 14 consisting of a wide portion 14a and a narrow portion 14b is formed in a seal land 13 in the spool. In addition, a packing 11 includes on both sides of its second portion 11b, which is fitted on the narrow portion 14b, a seal lip 18 that contacts the groove wall of the narrow portion 14b in a gas-tight manner such that air is prevented from flowing into the groove bottom. Furthermore, a lip width (f) representing the distance between both seal lips 18 and 18 under a non-seal condition is set the same as or smaller than the width (a) of the wide portion 14a of the mounting groove 14.

A pressure-control valve mounted so as to be directly positioned between a selector valve 3 and a base 2 comprising a valve body 15 with almost the same lateral width as the selector valve 3, with the body 15 including therein a plurality of communication passages allowing the passage holes in the selector valve 3 to communicate with the corresponding passage holes in the base 2; a pressure-control valve hole 19 disposed so as to cross the communication passages; a pressure-control valve rod 20 inserted into the valve hole; and a means cooperating with the pressure-control valve rod 20 to adjust the air pressure to a set value.

Pressure-control valve mounted on a base-mount selector valve

In a direct-coupled solenoid valve comprising an armature 27 of a solenoid control segment 3 that directly actuates a valve member 10 that opens and closes the passages between multiple ports, the armature 27 comprises an iron core 27a and a length setting member 27b that jointly set the core length L of the armature 27 to a switchable length according to the valve member 10.

Growing community of inventors

Ibaraki, Japan

Takashi Akimoto