JP4724167B2 - Switching valve for water jet loom - Google Patents

Description

  The present invention relates to a switching valve used for switching pressure water in a water jet loom.

  The switching valve for pressure water used for weft insertion of a water jet loom generally has a water inlet communicating with a pressure water supply source and a plurality of water outlets communicating with a terminal outlet such as a weft insertion nozzle. In the valve body, and a valve body inserted in the valve body is provided with a water conduit that selectively communicates the water inlet and one water outlet. By driving the valve body, the water inlet And one water outlet through a water conduit.

  One of the weft insertion pressure water supply devices using such a switching valve is described in Patent Document 1. In this prior art, the valve body arranged in the valve body is driven by an electric actuator such as a rotary solenoid, and the pressure water from the pressure water supply source is selectively used as one of a plurality of weft insertion nozzles by a switching valve. To supply.

Japanese Patent Laid-Open No. 10-1847

  In the conventional switching valve, since the water conduit provided in the valve body is only formed in a Y shape, the pressure water flows into the water conduit of the valve body and passes through the water conduit. The pressure water collides with the wall of the conduit and rotates the valve body. For this reason, the electric actuator operates to rotate the valve body in the reverse direction to restore the original state.

  As a result, the valve body is rotated alternately between the one and the other, and wear occurs between the valve body and the valve body, so that not only leakage of pressure water occurs, but also the water inlet, the conduit, and the conduit Deviations occur instantaneously at the water outlet, and pressure water jetting from the weft insertion nozzle is weakened due to these momentary deviations.

  An object of the present invention is to prevent rotation of the valve body when pressure water flows into the water conduit of the valve body.

The present invention relates to a valve body having a water inlet communicated with a pressure water supply source and a plurality of water outlets communicated with one of a plurality of terminal outlets including at least one weft insertion nozzle, and rotating to the valve body. A valve body that is inserted through the valve body, the valve body having a water conduit that communicates the water inlet with one of the water outlets, and driving means that rotationally drives the valve body in an angular manner. The water conduit communicates the water inlet with a specific water outlet at a predetermined rotational position of the valve body, and communicates the water inlet with another water outlet at a different rotational position of the valve body. It is assumed that the water-jet loom switching valve is formed.

In the switching valve according to the present invention, the water guide channel is a plurality of water channels extending toward the rotation center of the valve body, and one of the water channels is communicated with the water inlet at each rotational position of the valve body. And a part of the inner wall of the valve body is exposed to the water conduit at each rotational position of the valve body, and the exposed portion is formed to face all of the water inlets. Further, there is no inner wall surface extending in a direction intersecting with a straight line passing through the rotation center of the valve body from the water inlet in a region between the water inlet and a portion of the exposed portion facing the water inlet. It is characterized by being formed.

  In the switching valve according to the present invention, the water channel in the water conduit may be formed to have the same width as the water inlet.

  According to the present invention, the pressure water flowing into the water conduit goes straight from the water inlet and collides with an inner wall facing the water inlet through the water conduit among the inner walls of the valve body. For this reason, the valve body is not pressed, and the rotational force does not act on the valve body. For this reason, there is no deviation between the water conduit and the water outlet caused by the swinging of the valve body, and the communication is not hindered, so that the pressure water injection from the weft insertion nozzle is prevented from being impaired.

  1 to 3, the pressure water supply device 10 is used in a multi-color weft insertion water jet loom using first and second weft insertion nozzles (not shown). The first and second weft insertion nozzles individually correspond to wefts that can be inserted.

  The pressure water supply device 10 uses the first and second switching valves 12 and 14 and the first and second pressure water supply sources 16 and 18 such as feed water pumps individually corresponding to the switching valves. An apparatus is provided that selectively supplies pressure water to one of the first and second weft insertion nozzles.

  The switching valves 12 and 14 are respectively valve bodies 20 and 22, valve bodies 24 and 26 that are angularly rotatable in the corresponding valve bodies, and a case 28 that houses the valve bodies 20 and 22. And 30.

  The valve bodies 24 and 26 are manufactured integrally, and are coupled to a drive shaft 34 of an electric actuator 32 such as a rotary solenoid by a coupling 36 and are simultaneously driven to rotate at a predetermined timing in synchronization with the loom. The In the illustrated example, the cases 28 and 30 are also integrally formed.

  The valve bodies 20 and 22 and the cases 28 and 30 of the switching valves 12 and 14 respectively have one water inlet 38 and 40 for pressure water and two water outlets 42, 44 and 46, 48. Yes.

  The valve bodies 24 and 26 of the switching valves 12 and 14 have water conduits 50 and 52, respectively, that selectively guide the pressure water to one of the water outlets of the corresponding valve body.

  Water inlets 38 and 40 are in communication with first and second pressure water sources 16 and 18 via pipes 54 and 56, respectively. The first and third water outlets 42 and 46 formed in the valve bodies 20 and 22 are communicated with the first and second weft insertion nozzles through pipes 58 and 60, respectively. Second and fourth water outlets 44 and 48 formed in each valve body 20 and 22 are communicated with first and second outlets (not shown) via pipes 62 and 64, respectively. .

  Each of the pipes 54, 56, 58, 60, 62, 64 is connected to a corresponding case 28 or 30 by a fastener and a set screw. The pressure water supply sources 16 and 18 are driven at a predetermined timing in synchronization with the loom, respectively, to suck water in a recovery tank (not shown) into pressure water, and supply the water through pipes 54 and 56. Feed to inlets 38 and 40.

  In the illustrated embodiment, the first and second weft insertion nozzles and the first and second drain outlets all function as terminal outlets for jetting or discharging pressure water.

  The valve bodies 24 and 26 are connected to a selective stop position where the water inlets 38 and 40 are communicated with the water outlets 42 and 46 as shown in FIGS. 3A1 and 3B through the water conduits 50 and 52, respectively. As shown in (A2) and (B1), it is rotated angularly by the electric actuator 32 to a non-selective stop position where it communicates with the water outlets 44 and 48.

  The selection stop position is a position for supplying the supplied pressure water to the corresponding weft insertion nozzle when the switching valve and the corresponding weft insertion nozzle are selected. On the other hand, the non-selection stop position is a position for collecting the supplied pressure water from the corresponding discharge port to the collection tank when the switching valve and the corresponding weft insertion nozzle are not selected.

  One of the switching valves 12 and 14 is driven to supply pressure water to the weft insertion nozzle when the corresponding weft insertion nozzle is selected. At that time, the other switching valve corresponds to the corresponding switching valve. The valve bodies 24 and 26 are simultaneously driven by the actuator 32 in such a manner that the pressure water is driven to be discharged into a recovery tank (not shown) because it is not selected together with the weft insertion nozzle.

  However, since the valve bodies 24 and 26 are driven integrally, when the valve body 24 is moved to the selective stop position shown in FIG. 3 (A1), the valve body 26 is not selected and stopped as shown in FIG. 3 (B1). When the valve body 26 is moved to the selected position and moved to the selected stop position shown in FIG. 3 (B2), the valve body 24 is moved to the non-selected stop position shown in FIG. 3 (A2).

  As shown in FIG. 3, each of the water conduits 50 and 52 includes water passages 50 a and 52 a that communicate with the water inlets 38 and 40 when the valve bodies 24 and 26 are stopped at the selective stop position, and the valve body 24. The water passages 50b and 52b communicated with the water inlets 38 and 40 and the valve bodies 24 and 26 are stopped at either the selective stop position or the non-selective stop position. Is also composed of water channels 50c and 52c communicating with any one of the water outlets 42, 44 and 46, 48.

  The water channels 50a, 50b and 52a, 52b extend in the radial direction from the outer peripheral surfaces of the valve bodies 24 and 26 toward the axes 66 and 68 which are the rotation centers of the valve bodies 24 and 26, and communicate with the water channels 50c and 52c. . The water channels 50c and 52c have a fan-shaped cross-sectional shape with the center side being the axes 66 and 68, and are located on the opposite side of the water channels 50a, 50b and 52a, 52b with respect to the axes 66 and 68.

  Part of the inner peripheral surfaces of the valve bodies 20 and 22 are exposed to the water channels 50c and 52c of the water conduits 50 and 52, and the exposed portions connect the centers of the water inlets 38 and 40 and the axes 66 and 68. It includes a portion (hereinafter referred to as “opposing portion”) that faces all of the water inlets 38 and 40 in the direction of the straight line. The water channels 50a, 50b and 52a, 52b that connect the water inlets 38 and 40 and the water channels 50c and 52c at the selected stop position or the non-selected stop position are in the state where the axes 66 and 68 are in communication with the water inlets 38 and 40. It extends in the direction of, and faces the above-mentioned facing portion through water channels 50c and 52c. Furthermore, the water channels 50a, 50b and 52a, 52b are formed as water channels having the same width (same hole diameter / same channel cross-sectional area) as the water inlets 38 and 40, as shown.

  As described above, the switching valves 12 and 14 are configured such that all the water inlets 38 and 40 are guided to the inner peripheral surfaces of the valve bodies 20 and 22 with the valve bodies 24 and 26 in the selective stop position and the non-selective stop position. The centers of the water inlets 38 and 40 are opposed to the portions exposed to the water channels 50 and 52 and in the region between the water inlets 38 and 40 and the above-mentioned facing portions of the inner peripheral surfaces of the valve bodies 20 and 22. The inner wall surfaces of the water conduits 50 and 52 extending in the direction orthogonal to the straight line connecting the axis lines 66 and 68 are formed so as not to exist.

  The pressure water supply apparatus 10 further includes a stopper 72 that is rotated angularly together with the valve bodies 24 and 26 to restrict the positions of the valve bodies 24 and 26 of the switching valves 12 and 14 and an angle of the stopper 72. And a pair of position adjusting plates 74 and 74 (one not shown) for restricting the rotational range. The stopper 72 is attached to the coupling 36. The position adjustment plates 74 and 74 are attached to the case 28 so that the angular rotatable range of the stopper 72 can be adjusted.

  At least during the operation of the loom, the pressure water pressurized to a predetermined value from the pressure water supply sources 16 and 18 is supplied to the corresponding switching valves 12 and 14, respectively. The axes of the water inlets 38 and 40 of the switching valves 12 and 14 pass through the axis 66 of the valve bodies 24 and 26, that is, the rotation center. For this reason, the water flowing into the water conduit 50 or 52 from the water inlet 38 or 40 travels toward the axis 66 of the corresponding valve body 24 or 26, that is, the rotation center.

  In the pressure water supply apparatus 10, when the first weft insertion nozzle is selected, the switching valve 12 is selected, and the second weft insertion nozzle and the switching valve 14 are not selected.

  In this state, the valve body 24 of the switching valve 12 is displaced to the selective stop position shown in FIG. 3 (A1), whereas the valve body 26 of the switching valve 14 is not selected and stopped as shown in FIG. 3 (B1). Is displaced to position. Thereby, the pressure water from the pressure water supply source 16 is supplied to the first weft insertion nozzle by the switching valve 12, but the pressure water from the pressure water supply source 18 is discharged from the drain port to the recovery tank by the switching valve 14. Is done.

  On the other hand, when the second weft insertion nozzle is in the selected state, the valve body 26 of the switching valve 14 is displaced to the selection stop position shown in FIG. 24 is displaced to the non-selection stop position as shown in FIG. Thereby, the pressure water from the pressure water supply source 18 is supplied to the second weft insertion nozzle by the switching valve 14, but the pressure water from the pressure water supply source 16 is collected by the switching valve 12 through the discharge port. To be discharged.

  When pressure water is supplied to the switching valves 12 and 14 in a state where the switching valve 12 is in the selective stop position and the switching valve 14 is in the non-selective stop position, the water guide channels are formed from the water inlets 38 and 40. The pressure water flowing into 50 and 52 linearly passes through the water channels 50a and 50c and the water channels 52b and 52c, and collides with the inner walls of the valve bodies 20 and 22 facing all the water inlets 38 and 40. That is, the pressure water flowing into the water inlets 38 and 40 reaches the inner wall of the valve body 20 without applying a rotational force to the inner wall surfaces of the water conduits 50 and 52. Therefore, in the switching valves 12 and 14, the valve bodies 24 and 26 are hardly subjected to the rotational force by the pressure fluid flowing into the water conduits 50 and 52, and the valve bodies 24 and 26 do not rotate.

  Even when the switching valve 12 is maintained at the non-selection stop position and the switching valve 14 is maintained at the selection stop position, the same operation is performed as described above, and the same effect is produced.

  As a result, the communication between the water conduits 50 and 52 and the water outlets 42 and 46 due to the swinging of the valve bodies 24 and 26 is prevented, thereby impairing the pressure water injection from the weft insertion nozzle. It can be suppressed.

  In the switching valve described above, a motion conversion mechanism such as a cam or a link that converts and transmits the rotational force of the main shaft of the loom may be used as the valve body driving means instead of using a dedicated actuator. Moreover, in the pressure water supply apparatus using a plurality of switching valves, instead of providing a pressure water supply source for each switching valve, the pressure water supply source may be shared by the plurality of switching valves.

The present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention.

It is a figure which shows one Example of the pressure water supply apparatus which concerns on this invention. (A) is sectional drawing obtained along the 2A-2A line in FIG. 1, (B) is sectional drawing obtained along the 2B-2B line in FIG. It is sectional drawing which shows 1st Example of the switching valve which concerns on this invention, Comprising: (A1) and (B2) show the state by which the valve body was rotated to the selection stop position, (A2) and (B1) The state which the valve body rotated to the non-selection stop position is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Pressure water supply device 12, 14 Switching valve 16, 18 Pressure water supply source 20, 22 Valve main body 24, 26 Valve body 32 Actuator 38, 40 Water inlet 42, 44, 46, 48 Water outlet 50, 52 Water conduit 50a, 50b, 50c, 52a, 52b, 52c Water channel 66, 68 Valve body axis (rotation center)

Claims (2)

A valve body having a water inlet communicating with the pressure water supply source and a plurality of water outlets communicating with one of a plurality of terminal outlets including at least one weft insertion nozzle; and a valve body rotatably inserted in the valve body A valve body having a water conduit that communicates the water inlet with one of the water outlets, and driving means for rotationally driving the valve body angularly.
The water conduit in the valve body communicates the water inlet and a specific water outlet at a predetermined rotational position of the valve body, and connects the water inlet and another water outlet at different rotational positions of the valve body. In the switching valve of the water jet loom formed to communicate,
The water conduit includes a plurality of water passages extending toward the rotation center of the valve body, and each water passage communicates with the water inlet at each rotational position,
Further, the water conduit exposes a part of the inner wall of the valve body to the water conduit at each rotational position of the valve body, the exposed portion faces all the water inlets, and the water An inner wall surface of the water conduit extending from the water inlet in a direction intersecting with a straight line passing through the rotation center of the valve body does not exist in a region between the inlet and a portion of the exposed portion facing the water inlet. Formed,
A switching valve for a water-jet loom. The water channel in the water conduit is formed with the same width as the water inlet,
The switching valve for a water jet loom according to claim 1.

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