JP2007100258A - Water jet type loom - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water jet type loom capable of performing weft insertion stably. <P>SOLUTION: This water jet type loom equipped with a weft insertion pump for feeding the water used for the weft insertion and arranged at the side surface of outside of a loom frame of its yarn feeding side and a nozzle unit including a weft insertion nozzle arranged at almost the same height with a warp line at more warp yarn row side than the loom frame is provided by, among water supplying tubes connected to the nozzle unit from the weft insertion pump, the water-supplying tubes are arranged so that the center of the tubular passage positioned within the presenting range of the loom frame associated at least with the width direction of the loom is positioned at the lower part of the height position of the upper surface of the loom frame. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a water jet loom, in particular, a weft insertion pump for supplying weft insertion water, and a weft insertion pump disposed on an outer side surface of a yarn supply side loom frame, and the loom frame More particularly, the present invention relates to a water jet loom of a type including a nozzle unit including a weft insertion nozzle arranged at substantially the same height as the warp line on the warp row side.

As a water jet loom of the above type, there is one described in Patent Document 1. The water jet loom described in Patent Document 1 is supported on the upper surface of the loom frame via a weft insertion pump driven by a cam that rotates in synchronization with the main shaft of the loom and a support member such as a bracket. A weft insertion device including a weft insertion nozzle. A water tank (constant water level tank) to which water such as tap water is supplied is disposed below the pump.

The pump is arranged so that an internal flow path connecting the suction port and the discharge port extends in the vertical direction, the discharge port is connected to the weft insertion nozzle by a water supply pipe, and the suction port is It is connected to the aquarium by another water supply pipe. The pump performs suction and discharge operations of water in synchronization with the main shaft of the loom, and pumps water sucked from the water tank to the weft insertion nozzle by a built-in spring, whereby pressure water is injected from the weft insertion nozzle. The Further, the weft insertion nozzle has a height position (more precisely, a height position of the central axis) that is substantially the same height as a warp line that is a warp traveling line (a warp traveling position in a closed state). Placed in the weft insertion.

In the water jet loom described in Patent Document 1, the water supply pipe connecting the pump and the weft insertion nozzle is piped so as to bypass the upper surface of the loom frame. More specifically, the water supply pipe extending upward from the discharge port of the pump once passes over the upper surface of the loom frame, passes over the upper surface of the frame, and then descends downward again toward the weft insertion nozzle side. It is piped. Further, although not described in Patent Document 1, in the loom, other members such as a dobby stand may be disposed on the upper surface of the loom frame in the vicinity of the weft insertion nozzle. The water supply pipe connected to the weft insertion nozzle is generally piped so as to bypass such a member.

When the water supply pipe connected to the weft insertion nozzle is piped so as to bypass the members arranged on the frame of the loom and the upper surface of the frame as in the conventional water jet loom described above, the pipe length is long. At the same time, the number of times the pipe is bent increases, or the sum of the bending angles at each bent portion increases. As a result, the pipe length is increased to increase the pipe resistance to the pressure water supplied from the pump to the weft insertion nozzle, and the total number of bendings or bending angles is increased to increase the pipe inner length. Disturbance will occur in the flow of water flowing through. As a result, there is a problem that the convergence of the water jetted from the weft insertion nozzle is reduced and the water becomes easy to diffuse, and stable weft insertion cannot be performed. As described above, the piping of the water feed pipe connected to the weft insertion nozzle in the conventional water jet loom is a factor that impairs the weft insertion stability and lowers the weft insertion performance.
Japanese Patent Laid-Open No. 7-331560

Accordingly, an object of the present invention is to provide a water jet loom capable of performing stable weft insertion.

Based on the above problems, the water jet loom of the present invention is a weft insertion pump for supplying weft insertion water and is disposed on the outer side surface of the weaving machine frame on the yarn supply side. And a nozzle unit including a weft insertion nozzle that is arranged at the same height as the warp line on the warp line side of the loom frame and performs weft insertion, and is connected from the weft insertion pump to the nozzle unit. Among the water supply pipes, the water supply pipe is arranged such that at least the center of the pipe located in the range where the loom frame exists in the width direction of the loom is positioned below the height position of the upper surface of the loom frame. It is characterized by being piped.

As will be described later, the upper surface of the loom frame referred to in the present invention does not indicate the entire upper surface of the frame, but between the rear end edge of the nozzle unit and the rear end edge of the weft insertion pump in the front-rear direction of the frame. The portion of the frame located in this range is the uppermost portion of the upper surface of the portion and occupies most of the upper surface of the portion. Moreover, the front-rear direction in this specification represents the extending direction (traveling direction) of the warp, and the woven fabric side is the front and the warp row side is the rear as viewed from the front of the weave.

Further, the weft insertion nozzle arranged at the same height as the warp line in the present invention means more specifically that the height position of the central axis of the weft insertion nozzle is the same as the height position of the warp line. However, in practice, it is difficult to make the two exactly match due to the construction of the machine, so there are cases where they are not exactly the same height. This includes cases where the positions are different.

In the water-jet loom according to the present invention, at least a portion of the water supply pipe located in the presence range of the loom frame with respect to the width direction of the loom is at the rear end of the nozzle unit with respect to the longitudinal direction of the loom frame It is preferable that the water supply pipe is piped so as to be located in a region between the pump and the rear edge of the pump.

Further, in the water jet loom according to the present invention, the water supply pipe may be piped so that all the parts thereof are located below the height position of the upper surface of the frame. You may pipe so that the height position of the center of this pipe line may become below the height position of the warp line of a warp.

Furthermore, in the present invention, a through-hole penetrating from the outer side surface of the loom frame to the inner side surface is formed below the height position of the upper surface with respect to the loom frame, and the water supply pipe from the pump It is also possible to perform piping so as to pass through the inside of the through hole and reach the nozzle unit.

According to the water jet loom of the present invention described above, the water feed pipe connecting the weft insertion pump and the nozzle unit is compared to the pipe that bypasses the upper surface of the loom frame as in the prior art. The piping can be routed through a path closer to the shortest path connecting the discharge port of the pump and the connection end of the nozzle unit. Thereby, the pipe length of the water supply pipe connected to the nozzle unit can be shortened as compared with the conventional one, and an increase in the pipe resistance against the pressure water supplied to the weft insertion nozzle can be prevented. In addition, if the pipe line resistance due to the water supply pipe can be reduced, the spring force of the spring used in the pump can be made smaller, so the load on the pump can be reduced.

In the present invention, it is more preferable that the water supply pipe is piped so that the height position of the pipe line center of all the parts of the water supply pipe is equal to or less than the height position of the warp line. . Because, generally, the weft insertion nozzle for performing weft insertion is arranged at the same height as the warp line, so that the center of a part of the pipe of the water supply pipe is positioned higher than the warp line. In the case of piping, the number of times of bending or the total bending angle of the water supply pipe may be comparable to the conventional one. On the other hand, by piping the water supply pipe so that the height position of the center of the pipeline in all the parts is less than or equal to the height position of the warp line, the total number of bending times or bending angles of the water supply pipe Therefore, the occurrence of turbulence of the water flow in the pipeline can be prevented.

However, even if the total number of bendings and bending angles are about the same as the conventional one, according to the present invention, as described above, the pipe length of the water supply pipe can be made shorter than the conventional one. An effect of preventing an increase in pipe resistance against pressure water supplied to the inlet nozzle can be obtained. Therefore, in the present invention, the water supply pipe connected to the weft insertion nozzle does not necessarily have to be piped so that the center of the pipe line is not more than the height position of the warp line.

Moreover, according to this invention, the effect that the early breakage of a water supply pipe | tube can be prevented effectively is also acquired. That is, each device provided in the loom vibrates itself during operation due to the influence of the vibration of the entire loom. If the pipe length of the water supply pipe is long as in the past, the vibration of the water supply pipe itself will increase, and this will adversely affect the flow of water in the pipe line, or the water supply pipe itself It is easy for damage to occur. On the other hand, according to the present invention, since the pipe length of the water supply pipe can be shortened, an effect that the above problems can be effectively prevented is also obtained.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 to 4 show an embodiment of the present invention. FIG. 1 shows a frame 10 on a yarn feeding side of a water jet loom to which the present invention is applied, and a weft insertion attached to the frame 10. A schematic diagram of the apparatus is shown.

The weft insertion device includes a constant water level tank 22 to which water is supplied from a water supply source (not shown), a weft insertion pump 24 and a nozzle unit 20. The constant water level tank 22 is disposed on the floor surface in the vicinity of the outer side surface (side surface on the side of the anti-warp row (anti-woven fabric)) 10b of the frame 10, and is connected to a water supply source (not shown) by the water supply pipe 22a. Has been.

The weft insertion pump 24 is known per se, and generally contains in the pump 24 a spring (not shown) that acts on a main body portion 24d that stores water during inhalation and an internal plunger. And a spring cap 24e for achieving the above state, and the position of the spring cap 24e is fixed by a lock nut 24f.

The pump 24 is fixed to the outer side surface 10 b of the frame 10 so as to be positioned above the constant water level tank 22. The pump 24 has a suction port 24 a connected to the constant water level tank 22 through the water supply pipe 23 and a discharge port 24 b connected to the weft insertion nozzle 26 through the water supply pipe 21. Yes. Then, the pump 24 is driven by driving means (not shown) during operation of the loom, and repeats the suction and discharge operations. The drive means employs a cam mechanism using a cam that is rotationally driven using a main shaft (loom driving motor) as a drive source, a dedicated drive motor independent of the main shaft, and the like.

The nozzle unit 20 includes a nozzle holder 27 connected to the water supply pipe 21 and a weft insertion nozzle 26 fitted and supported by the nozzle holder 27. The nozzle holder 27 is connected to the water supply pipe 21 at its connection end 27 a, and this connection end 27 a becomes the last end of the nozzle unit 20. In the nozzle holder 27, a water supply path (not shown) for connecting the connection end 27a and the weft insertion nozzle 26 is formed. The weft insertion nozzle 26 is connected to the water supply pipe 21 through the water supply path of the nozzle holder 27. The illustrated example shows only the case where there is one weft insertion nozzle. However, when the weft insertion device includes a plurality of weft insertion nozzles, the nozzle unit includes the plurality of weft insertion nozzles and each weft insertion nozzle. The nozzle unit includes a plurality of nozzle holders, and the rearmost end of the nozzle unit is a connection end with the water supply pipe of the nozzle holder located on the rearmost side.

The nozzle holder 27 is assembled to the nozzle bracket 28. The nozzle bracket 28 is attached to the bracket 14 fixed to the inner side surface (side surface on the warp row (woven fabric) side) 10c of the frame 10 (FIGS. 2 to 4). In the illustrated example, the nozzle bracket 28 is attached to the bracket 14 by a screw member or the like (not shown) through a long hole formed in the nozzle bracket 28 in the front-rear direction and a long hole formed in the bracket 14 in the vertical direction. It has been. Accordingly, the position of the nozzle bracket 28 can be adjusted in the front-rear direction and the up-down direction with respect to the frame 10, whereby the position of the weft insertion nozzle 26 in the front-rear direction and the up-down direction can be adjusted. The weft insertion nozzle 26 is set so that its height position is the same as the height position of the warp line WL, which is the travel position when the warp T connected to the CF before weaving is closed (FIG. 2). FIG. 3 (a)).

In the water jet loom equipped with the weft insertion device configured as described above, in this embodiment, as shown in the figure, a through-hole 12 that penetrates the frame 10 from the outer side surface 10b toward the inner side surface 10c is formed. Has been. The through hole 12 is formed on the pump 24 side of the rear end edge of the nozzle unit 20 and below the height position of the upper surface 10a of the frame 10.

In addition, regarding the height position of the upper surface 10a of the frame 10 described above, the upper surface of the loom frame is not necessarily the same height throughout, but allows other devices attached to the frame or the passage of wefts. For this purpose, for example, there is a portion (upper surface) having a partially different height, such as a recess 16 shown in FIG. The present invention is not intended for the piping of such a weft insertion device, the upper surface partially reduced in height regardless of the piping is not targeted, specifically, The upper surface of the frame referred to in the present invention is the highest of the upper surfaces of the portion of the frame located in the range between the rearmost end of the nozzle unit and the rear end edge of the weft insertion pump in the front-rear direction. The upper surface which is located and occupies most of the upper surface of the portion.

In this embodiment, the water supply pipe 21 connected from the pump 24 to the weft insertion nozzle 26 passes through the inside of the through hole 12 and reaches the weft insertion nozzle 26 (FIGS. 3A and 3B). ). That is, the portion of the water supply pipe 21 located in the range where the frame 10 exists does not pass through the upper surface of the frame 10 as shown in FIG. The water supply pipe 21 is piped so as to be positioned below the lower side. As a result, the water supply pipe 21 bypasses the upper surface 10a of the frame 10 and is the shortest connecting the discharge port 24b of the pump 24 and the connection end 27a of the water supply pipe 21 of the nozzle holder 27 as compared to the conventional case. Piping is performed in a state closer to the route (virtual line VL in FIG. 3A), and thereby the length of the conduit can be shortened.

Moreover, in the illustrated example, the height position of the pipe center 21a of the water supply pipe 21 is all equal to or lower than the height position of the warp line WL. Thereby, the frequency | count of bending of the water supply pipe | tube 21 or the sum total of the bending angle of each bending part can be decreased compared with the past. As a result, the convergence of the water jetted from the weft insertion nozzle 26 is improved compared to the prior art, the tip shape of the jet water is always stable over the existing range of the warp T, and the weft insertion is stable. Done.

Regarding the position where the through hole 12 is formed, with respect to the front-rear direction, as shown in FIG. 4, the portion of the water supply pipe 21 that passes through the interior is the rear end edge 24 c of the nozzle unit 20 and the rear end edge 24 c of the pump 24. It is preferable to form so as to pass through the range of the region R between. In the illustrated example, the water supply pipe 21 is located in the range of the region R with respect to the longitudinal direction of the loom, and the pipe center 21a that passes through the inside of the through hole 12 has a pipe center 21a. The pipe unit is piped so as to be located within a region r between the connection end 27a of the nozzle unit 20 and the rear side end of the discharge port 24b of the pump 24 in the longitudinal direction of the frame.

Even if the pipe is piped at a position lower than the height position of the upper surface 10 a of the frame 10, the pipe length is still long if it is largely detoured in the front-rear direction of the frame 10. However, if it is the above piping, the path length of the water supply pipe 21 regarding the front-back direction of the flame | frame 10 will also become short, and it can shorten pipe length as a whole.

In addition, as for the position in the front-rear direction of the water supply pipe 21, it is most preferable that the pipe is arranged so that all of the center of the pipe line is located within the range of the region r described above. Some member is attached to the outer side surface 10b, and in order to avoid this member, there is a case in which piping is required to bypass the water supply pipe 21 backward. Accordingly, with respect to the position in the front-rear direction, the entire water supply pipe 21 or the pipe center 21a (at least the pipe center 21a passing through the inside of the through hole 12) is connected to the rear end 27a of the nozzle unit 20. It suffices to be within the range of the region R between the rear end edge 24c of the pump 24, and more preferably between the rear end edge 27a of the nozzle unit 20 and the rear end edge of the body portion 24d of the pump 24. What is necessary is just to make it settle in the range of area | region R '.

Further, the formation position in the vertical direction of the through hole 12 is not particularly limited as long as it is above the height position of the discharge port 24b of the pump 24. For example, the virtual line VL shown in FIG. It is best to form at a position including (the shortest path connecting the discharge port 24b of the pump 24 and the connection end 27a of the nozzle unit 21). However, other devices and members (shafts, gears, etc.) are often arranged inside the frame 10 and the outer side surface 10b, and the formation positions of the through holes 12 are restricted by these devices. About the formation position of an up-down direction, it is a position which can be formed, Comprising: The water supply pipe | tube 21 which passes through the inside should just be piped so that it may pass along the path | route nearer the said virtual line VL.

Other embodiments

In the above embodiment, the through hole 12 is formed in the frame 10 in order to pass the pipe center 21a of the water supply pipe 21 below the height position of the upper surface 10a of the frame 10 in the range where the frame 10 exists. However, the present invention is not limited to this embodiment. The top surface of the through-hole 12 is not necessarily required, and a recess 18 may be formed instead of the through-hole 12 as shown in FIG. That is, the structure formed in the frame 10 for piping the water supply pipe 21 according to the present invention is such that its bottom surface is located below the top surface of the frame and below the top surface of the frame. It is sufficient if it has a height region that allows passage.

In the example of FIG. 5, the recess 18 for piping the water supply pipe 21 is formed independently of the recess 16 formed in the frame 10 for another purpose. In order to use the recess 16 also for piping of the water supply pipe 21, the width in the front-rear direction may be formed to extend rearward from the original target width. Incidentally, the purpose of forming the recess 16 is to prevent the weft drawn from the weft storage device arranged upstream of the weft insertion nozzle 26 in the weft drawing direction from interfering with the frame 10.

In the above embodiment, the water jet loom that performs weft insertion by one weft insertion nozzle 26 has been described. However, the water jet loom targeted by the present invention is not limited to this, and a plurality of water jet looms may be used. The present invention is also applicable to a water jet loom equipped with a so-called multicolor weft insertion device that performs weft insertion with a weft insertion nozzle. In this case, the plurality of weft insertion nozzles are not limited to all the nozzles disposed at substantially the same height as the warp line, and the weft insertion device is configured such that each weft insertion nozzle can swing or move linearly, At the time of weft insertion, the weft insertion nozzle used for the weft insertion may be arranged at the weft insertion position at the same height as the warp line. That is, the “weft insertion nozzle that is arranged at the same height as the warp line and performs weft insertion” in the present invention is not limited to the one that is always arranged at the weft insertion position during weaving, but when weft insertion is performed. In addition, only those arranged at the weft insertion position at the same height as the warp line are included.

Furthermore, in the present invention, water injection is not limited to supplying pressure water to one or a plurality of weft insertion nozzles by a single pump, but to supply pressure water from a plurality of pumps to corresponding weft insertion nozzles. The present invention can also be applied to a type loom. Further, in this case, the plurality of pumps are not limited to be disposed below the upper surface of the frame, and for example, two pumps may be disposed above and below the upper surface of the frame. That is, in the case of using two pumps, it is required to align the front and rear positions of the pumps in order to make the driving means common, and the piping of the water supply pipe to the weft insertion nozzle is not hindered while satisfying the request. In some cases, the arrangement as described above may be adopted for the purpose, but the present invention is applicable even in such a case.

Even when the pump is arranged above, the switching valve provided in the pipe of the water supply pipe to the weft insertion nozzle is often provided below the upper surface of the frame, in which case the water supply pipe Once extends below the upper surface of the frame. In addition, if the water supply pipe is again piped so as to pass above the upper surface of the frame, the pipe length becomes very long. Can be shortened.

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

1 is a perspective view showing an embodiment of the present invention. The front view which shows the principal part of one Embodiment of this invention. The partial cross section side view which shows the principal part of one Embodiment of this invention. The top view which shows the principal part of one Embodiment of this invention. The perspective view which shows other embodiment of this invention.

Explanation of symbols

10 frame (loom frame)
10a Upper surface of frame 10b Outer side surface of frame 10c Inner side surface of frame 12 Through hole 18 Recess 20 Nozzle unit 21 Water supply pipe 22 Constant water level tank 23 Water supply pipe 24 Pump (pump for weft insertion)
24a Pump suction port 24b Pump discharge port 24c Rear end edge of pump 26 Weft insertion nozzle that is part of nozzle unit 27 Nozzle holder that is part of nozzle unit 27a Connection end with water supply pipe T Warp WL Warp line

Claims (5)

A weft insertion pump for supplying water for weft insertion, which is disposed on the outer side surface of the weaving machine frame on the yarn supply side, and the same height as the warp line on the warp row side than the frame A water jet loom equipped with a nozzle unit including a weft insertion nozzle arranged in the weft insertion,
Among the water supply pipes connected from the pump to the nozzle unit to supply the water to the weft insertion nozzle, at least a portion of the pipe line center located in the frame existing range in the width direction of the loom is the frame. The water supply pipe is piped so as to be positioned below the height position of the upper surface of
A water jet loom characterized by that. A pipe line center of a portion of the water supply pipe located in a range where the frame exists in the width direction of the loom is at least a rear end edge of the nozzle unit and a rear edge of the pump in the front-rear direction of the frame. The water jet loom according to claim 1, wherein the water supply pipe is piped so as to be located in a region between the two. 3. The water jet loom according to claim 1, wherein all parts of the water supply pipe are located below a height position of an upper surface of the frame. The height position of the pipe line center of all the parts of the water supply pipe is equal to or lower than the height position of the warp line, according to any one of claims 1 and 2. Water jet loom. In the loom frame, a through-hole penetrating from the outer side surface to the inner side surface of the frame is formed below the height position of the upper surface of the frame, and the water supply pipe from the pump The water jet loom according to any one of claims 1 to 4, wherein the water jet loom is piped so as to pass through a through hole and reach the nozzle unit.

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