Weft insertion device of air jet loom

Abstract

Provided is a weft insertion device of an air jet loom, wherein the number of electromagnetic on-off valves can be increased without replacing an air tank. A weft insertion device (20) of an air jet loom (100) is provided with a plurality of sub-nozzles (S), an air tank (10) in which a plurality of tank holes (10a) are formed, a plurality of electromagnetic on-off valves (22), and a plurality of support members (21). Each electromagnetic on-off valve (22) is provided with an inlet (22a) into which compressed air flows. A tank connection port (31a) communicating with one tank hole (10a) is formed in the support member (21), and a first valve connection port (321a) and a second valve connection port (322a) communicating with the inflow port (22a) are formed in the support member (21). An internal flow path (40) connecting the tank connection port (31a) to the first valve connection port (321a) and the second valve connection port (322a) is formed inside the support member (21).

Description

Technical Field

[0001] The present invention relates to a weft insertion device for a jet loom. Background Art

[0002] For example, Patent Document 1 discloses a weft insertion device in a jet loom which is a jet weaving machine. The weft insertion device in the jet loom includes an air tank, a plurality of auxiliary nozzles for weft insertion as a plurality of sub-nozzle parts, a plurality of electromagnetic on-off valves, and a plurality of pipes. An inflow port is formed in each electromagnetic on-off valve. An outflow port as a tank hole is formed in the air tank.

[0003] The plurality of electromagnetic on-off valves are arranged in the weft insertion direction of the weft yarn. Each electromagnetic on-off valve is attached to the air tank in such a manner that the inflow port communicates directly with the tank hole. The plurality of sub-nozzle parts are connected to the air tank via a single electromagnetic on-off valve as a group. The plurality of sub-nozzle parts are arranged in the weft insertion direction of the weft yarn. Each sub-nozzle part is supplied with air from the air tank via a pipe and an electromagnetic on-off valve. Further, the weft insertion device inserts the weft yarn by the jet action of the air formed by each sub-nozzle part.

[0004] Patent Document 1: Japanese Patent Application Laid-Open No. 2003-239160

[0005] In the weft insertion device disclosed in Patent Document 1, in the case where the number of electromagnetic on-off valves is increased in order to reduce the number of sub-nozzle parts connected to each electromagnetic on-off valve, it is necessary to replace the air tank formed with tank holes corresponding to the increased number of electromagnetic on-off valves. The replacement work of the air tank requires a large amount of man-hours. Therefore, a weft insertion device for a jet loom that can increase the number of electromagnetic on-off valves without replacing the air tank is desired. Summary of the Invention

[0006] A weft insertion device for a jet loom for solving the above problems is provided in a jet loom that inserts a weft yarn into a reed inner passage through a main nozzle, and includes: a plurality of sub-nozzle parts provided in the weft insertion direction of the weft yarn, and spraying compressed air to the weft yarn inserted into the reed inner passage; an air tank that stores the compressed air sprayed from the sub-nozzle parts, and having a plurality of tank holes formed in the weft insertion direction; an electromagnetic on-off valve that controls the supply of the compressed air from the air tank to the sub-nozzle parts, having an inflow port for the compressed air to flow in, and provided with a plurality of them in the weft insertion direction; and a support member that is attached to the air tank and supports the electromagnetic on-off valve. The gist of the weft insertion device for a jet loom is that a tank connection port communicating with one of the tank holes is formed in the support member, and a plurality of valve connection ports communicating with the inflow ports are formed, and an internal flow path connecting the tank connection port and the plurality of valve connection ports is formed inside the support member.

[0007] Accordingly, a plurality of electromagnetic on-off valves can be connected to a single tank hole via a support member. In other words, by installing a support member on the air tank, the number of electromagnetic on-off valves installed on the air tank can be increased. As a result, the weft insertion device of a jet loom can increase the number of electromagnetic on-off valves installed on the air tank without replacing the air tank.

[0008] Alternatively, in the weft insertion device of the above-described jet loom, the support member has: a tank-side surface having the tank connection port; and a valve-side surface, which is a surface different from the tank-side surface and has a plurality of the valve connection ports. The support member is plate-shaped, with the tank-side surface and the valve-side surface facing in opposite directions in the plate thickness direction, and the internal flow path is formed within the plate thickness.

[0009] Accordingly, the tank connection port and the valve connection port are arranged in the plate thickness direction. Thus, the support member forms the tank connection port and the valve connection port and can vary in thickness. As a result, by varying the plate thickness of the support member to match the size of the space in which the support member and the electromagnetic on-off valve are disposed, the enlargement of the weft insertion device of the jet loom can be suppressed.

[0010] Alternatively, in the weft insertion device of the above-described jet loom, a pair of first fixing holes are formed in the electromagnetic on-off valve, a pair of second fixing holes different from the pair of second fixing holes and a pair of third fixing holes are formed in the support member, and a pair of fourth fixing holes are formed in the air tank. The electromagnetic on-off valve can be installed on the support member by a valve fixing member inserted into the pair of first fixing holes and then inserted into the pair of second fixing holes. The support member can be installed on the air tank by a support fixing member inserted into the pair of third fixing holes and then inserted into the pair of fourth fixing holes. The diameters of the first fixing hole, the second fixing hole, the third fixing hole, and the fourth fixing hole are the same, and the distances between the pair of first fixing holes, the pair of second fixing holes, the pair of third fixing holes, and the fourth fixing hole are the same.

[0011] Accordingly, the electromagnetic on-off valve can be directly installed on the air tank by inserting the valve fixing member inserted into the first fixing hole into the fourth fixing hole. Moreover, the electromagnetic on-off valve can be installed on the support member by inserting the support fixing member inserted into the first fixing hole into the second fixing hole. In other words, the fourth fixing hole for installing the support member on the air tank can also be used as the fixing hole for directly installing the electromagnetic on-off valve on the air tank. Therefore, it is also possible not to provide new holes for installing the support member in the air tank. As a result, the weft insertion device of the jet loom can install the support member without machining the sub-tank on which the electromagnetic on-off valve is installed.

[0012] Alternatively, in the weft insertion device of the air-jet loom described above, the support member has: a first forming member formed with the tank connection port; and a second forming member formed with the plurality of valve connection ports, and the support member is formed by facing the first forming member and the second forming member in the plate thickness direction. A flow path dividing space is formed in at least one of the first forming member and the second forming member, and the internal flow path is divided by closing the flow path dividing space at least by the other of the first forming member and the second forming member.

[0013] Accordingly, compared with the case where the support member is formed of a single member, it becomes easier to form the path and cross-sectional shape of the internal flow path.

[0014] Alternatively, in the weft insertion device of the air-jet loom described above, the support member has an inclined surface facing the direction of the passage inside the reed, the electromagnetic on-off valve is supported by the inclined surface, and the plurality of valve connection ports open at the inclined surface.

[0015] Accordingly, the support member has an inclined surface and an electromagnetic on-off valve is provided on the inclined surface. The inclined surface faces the direction of the passage inside the reed, and thus faces the auxiliary nozzle portion. In other words, by providing the inclined surface, the support member can reduce the distance between the electromagnetic on-off valve and the auxiliary nozzle portion and make the electromagnetic on-off valve face the direction of the auxiliary nozzle portion. As a result, the distance through which the compressed air flows between the electromagnetic on-off valve and the auxiliary nozzle portion can be shortened, and thus the pressure loss generated until the compressed air reaches the auxiliary nozzle portion can be reduced.

[0016] According to the present invention, it is possible to increase the number of electromagnetic on-off valves without replacing the air tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic view showing an air-jet loom.

[0018] Figure 2 is a partial side view showing an air-jet loom.

[0019] Figure 3 is a perspective view showing a support member.

[0020] Figure 4 is a partial enlarged view showing an air tank, a support member, and an electromagnetic on-off valve.

[0021] Figure 5 is a perspective view showing a support member of a modification.

[0022] Figure 6 is a partial side view showing a modified air-jet loom.

[0023] Figure 7It is a partial side view of a jet loom showing a modified example.

[0024] Explanation of Reference Numerals

[0025] 10... air tank; 10a... tank hole; 16b... passage inside reed; 20... weft insertion device; 21... support member; 22... electromagnetic on-off valve; 22a... inlet; 31... tank side surface; 31a... tank connection port; 32... valve side surface; 40... internal flow path; 100... jet loom; 321a... first valve connection port as a valve connection port; 322a... second valve connection port as a valve connection port; A1... first forming member; A2... second forming member; A5... flow path dividing space; BH1... first pair of valve fixing holes as a pair of second fixing holes; BH2... second pair of valve fixing holes as a pair of second fixing holes; D... inclined surface; F1... pair of first fixing pins as valve fixing members; F2... pair of second fixing pins as support fixing members; H1... pair of first fixing holes; H3... pair of third fixing holes; H4... pair of fourth fixing holes; M... main nozzle part; S... sub-nozzle part; T... plate thickness direction; X... weft insertion direction; Y... weft yarn. Detailed Description of the Invention

[0026] Hereinafter, based on Figures 1 to 4 An embodiment in which the weft insertion device of a jet loom is embodied will be described.

[0027] <Overall Image of Jet Loom>

[0028] As Figure 1 and Figure 2 shown, the jet loom 100 includes a pair of side frames 11, a locking shaft 12, a reed base 13, a profile reed 16, a main nozzle part M, and a weft insertion device 20.

[0029] As Figure 1 shown, the pair of side frames 11 are separately provided in the width direction W of the jet loom 100. Although not shown in detail, the locking shaft 12 is installed on the pair of side frames 11 so as to extend in the width direction W of the jet loom 100. Both ends in the extending direction of the locking shaft 12 are supported by the side frames 11 so as to be reciprocally rotatable.

[0030] As Figure 2 shown, the locking shaft 12 integrally has an arm 12a extending upward of the jet loom 100. The reed base 13 is supported at the upper end of the arm 12a. The reed base 13 extends in the width direction W of the jet loom 100. The reed base 13 rotates integrally with the locking shaft 12.

[0031] The profile reed 16 is supported by the reed base 13. The lower end of the profile reed 16 is fixed to the reed base 13. The profile reed 16 is formed by a plurality of reed teeth 16a arranged in a row in the width direction W of the jet loom 100. In addition,Figure 2 Only one reed tooth 16a out of a plurality of reed teeth 16a is shown.

[0032] As Figure 1 As shown, a plurality of reed teeth 16a are arranged at intervals in the width direction W of the air-jet loom 100 on the reed base 13. Each reed tooth 16a is supported on the reed base 13 by fixing the lower end of each reed tooth 16a to the reed base 13. A passage 16b is formed in the shaped reed 16. The passage 16b extends in the width direction W of the air-jet loom 100. In other words, the passage 16b extends in the direction in which the reed teeth 16a are arranged. The passage 16b opens at both ends of the shaped reed 16 in the direction in which the reed teeth 16a are arranged.

[0033] The main nozzle portion M is connected to a pressure supply source (not shown) and shoots the weft yarn Y into the passage 16b. The weft yarn Y shot into the passage 16b travels in the passage 16b in the width direction W of the air-jet loom 100. In other words, the air-jet loom 100 inserts the weft yarn Y into the passage 16b through the main nozzle portion M. The direction in which the weft yarn Y shot by the main nozzle portion M travels is defined as the weft insertion direction X. The weft insertion direction X coincides with the width direction W of the air-jet loom 100. Therefore, the passage 16b extends in the weft insertion direction X.

[0034] <Weft Insertion Device>

[0035] The weft insertion device 20 includes an air tank 10, a plurality of sub-nozzle portions S, a plurality of support members 21, a plurality of electromagnetic on-off valves 22, and a plurality of flexible tubes 23.

[0036] The air tank 10 is in a long strip shape whose long side extends in the width direction W of the air-jet loom 100, in other words, in the weft insertion direction X. Each end of the air tank 10 in the long side direction is supported by the side frame 11. In other words, the air tank 10 is supported by a pair of side frames 11 and is installed between the pair of side frames 11. Moreover, the air tank 10 functions as a beam member of the loom frame that extends along the width direction W of the air-jet loom 100 and is fixedly provided.

[0037] As Figure 2 As shown, a tank chamber 10b is formed inside the air tank 10. The air tank 10 is supplied with compressed air from a pressure supply source (not shown) and stores the compressed air in the tank chamber 10b. In other words, the air tank 10 stores compressed air.

[0038] As Figure 1 As shown, a plurality of tank holes 10a are formed in the air tank 10 in a row along the long side direction of the air tank 10. In other words, a plurality of tank holes 10a are formed in the air tank 10 along the weft insertion direction X. As Figure 4 As shown, a pair of fourth fixing holes H4 are formed in the air tank 10 with each tank hole 10a interposed therebetween in the weft insertion direction X.

[0039] <Sub-nozzle part>

[0040] As Figure 2 shown, in the air-jet loom 100, the direction in which the profile reed 16 moves for beating-up is taken as the front, and the direction in which it returns after beating-up is taken as the rear. It can be said that the profile reed 16 rotates in the front-rear direction F of the air-jet loom 100.

[0041] In the front-rear direction F of the air-jet loom 100, a plurality of sub-nozzle parts S are arranged between the profile reed 16 and the air reservoir 10. The plurality of sub-nozzle parts S are arranged in the longitudinal direction of the air reservoir 10. In other words, the plurality of sub-nozzle parts S are arranged in the weft insertion direction X. Each sub-nozzle part S is attached to the reed base 13. In other words, each sub-nozzle part S is supported by the reed base 13 so as to be integrally rotatable with the locking shaft 12.

[0042] The first end of the flexible tube 23 is connected to the sub-nozzle part S. The second end of the flexible tube 23 is connected to the electromagnetic on-off valve 22.

[0043] <Electromagnetic on-off valve>

[0044] As Figure 1 shown, a plurality of electromagnetic on-off valves 22 are attached to the air reservoir 10 via the support member 21. The plurality of electromagnetic on-off valves 22 are arranged and configured in the longitudinal direction of the air reservoir 10. In other words, a plurality of electromagnetic on-off valves 22 are provided in the weft insertion direction X.

[0045] Each electromagnetic on-off valve 22 has one inlet port 22a for compressed air to flow in and two outlet ports 22b. In other words, the electromagnetic on-off valve 22 has an inlet port 22a for compressed air to flow in. The second end of the above-mentioned flexible tube 23 is connected to each outlet port 22b. The compressed air that flows into the electromagnetic on-off valve 22 from the inlet port 22a via the support member 21 to be described later passes through the valve passage 22c formed inside the electromagnetic on-off valve 22 and then is sent out from the outlet port 22b to the flexible tube 23. Each electromagnetic on-off valve 22 receives the supply of compressed air through the inlet port 22a and ejects compressed air from the two sub-nozzle parts S via the valve passage 22c, the two outlet ports 22b respectively, and the two flexible tubes 23.

[0046] Therefore, compressed air is supplied to each sub-nozzle part S from the air reservoir 10 via the flexible tube 23, the electromagnetic on-off valve 22, and the support member 21 to be described later. Each sub-nozzle part S ejects the compressed air supplied from the air reservoir 10. Each sub-nozzle part S ejects the compressed air into the passage 16b inside the reed.

[0047] Each electromagnetic on-off valve 22 can be switched between a state in which the inlet port 22a and the outlet port 22b are in communication, i.e., the energized state, and a de-energized state in which the inlet port 22a and the outlet port 22b are blocked. Each electromagnetic on-off valve 22 is connected to a control device (not shown), and is switched between the energized state and the de-energized state by a signal from the control device. The control device can control each electromagnetic on-off valve 22 individually. For example, the control device can make one of the plurality of electromagnetic on-off valves 22 in the energized state and make the other electromagnetic on-off valves 22 in the de-energized state. In other words, the electromagnetic on-off valve 22 controls the supply of compressed air from the air tank 10 to the sub-nozzle portion S.

[0048] As Figure 4 shown, a pair of first fixing holes H1 are formed in each electromagnetic on-off valve 22. Each first fixing hole H1 opens on the surface of the electromagnetic on-off valve 22 on the side of the air tank 10 and on the surface opposite to this surface.

[0049] <Support member>

[0050] Each support member 21 is interposed between the electromagnetic on-off valve 22 and the air tank 10. Each support member 21 is plate-shaped with a long side extending in the weft insertion direction X and having a plate thickness in the front-rear direction F. In addition, each support member 21 is plate-shaped with a short side extending in the up-down direction U. Therefore, each support member 21 is rectangular plate-shaped. In the following description, in the support member 21, the direction consistent with the front-rear direction F of the air-jet loom 100 is taken as the plate thickness direction T. Each support member 21 has a tank-side surface 31 and a valve-side surface 32 which is the opposite surface of the tank-side surface 31 in the plate thickness direction T. In other words, the support member 21 is plate-shaped, and the tank-side surface 31 and the valve-side surface 32 are opposite surfaces to each other in the plate thickness direction T. In addition, each support member 21 has a first support side surface 33 and a second support side surface 34 which is the opposite surface of the first support side surface 33 in the weft insertion direction X. In addition, the support member 21 is mounted on the air tank 10 such that the long side direction of the support member 21 is consistent with the weft insertion direction X. Therefore, the weft insertion direction X of the support member 21 can also be referred to as the long side direction of the support member 21. In addition, the support member 21 is mounted on the air tank 10 such that the short side direction of the support member 21 is consistent with the up-down direction U. Therefore, the up-down direction U of the support member 21 can also be referred to as the short side direction of the support member 21.

[0051] In each support member 21, the first support side surface 33 is located on the side of the main nozzle portion M among the side surfaces in the weft insertion direction X. Each support member 21 has a downward-facing support lower surface 35 and a support upper surface 36 which is the opposite surface of the support lower surface 35 and faces upward in a direction orthogonal to the plate thickness direction T and the weft insertion direction X, i.e., the up-down direction U.

[0052] As Figure 3 shown, a can connection port 31a is formed on the can side surface 31 of each support member 21. In other words, the can side surface 31 has the can connection port 31a. The can connection port 31a is formed at the center of the support member 21 in the weft insertion direction X and near the support lower surface 35 in the up-down direction U.

[0053] In addition, a first valve connection port 321a and a second valve connection port 322a, which are a plurality of valve connection ports, are formed on the valve side surface 32 of each support member 21. In other words, the valve side surface 32 is a surface different from the can side surface 31 and has the first valve connection port 321a and the second valve connection port 322a. In the weft insertion direction X, the first valve connection port 321a is formed at a position closer to the first support side surface 33 than the can connection port 31a. In the weft insertion direction X, the second valve connection port 322a is formed at a position closer to the second support side surface 34 than the can connection port 31a. The first valve connection port 321a and the second valve connection port 322a are formed at positions separated from each other in the weft insertion direction X. In the up-down direction U, the first valve connection port 321a and the second valve connection port 322a are formed at positions closer to the support upper surface 36 than the can connection port 31a.

[0054] As Figure 4 shown, each support member 21 is disposed at a position where the can side surface 31 faces the gas can 10 and the can connection port 31a communicates with one of the plurality of can holes 10a. In other words, a can connection port 31a that communicates with one of the can holes 10a is formed in the support member 21.

[0055] The distance in the weft insertion direction X from the can connection port 31a to the first valve connection port 321a is the same as the distance in the weft insertion direction X from the can connection port 31a to the second valve connection port 322a.

[0056] Each support member 21 is disposed at a position where the valve side surface 32 faces the two electromagnetic on-off valves 22. In addition, each support member 21 is disposed at a position where the inflow ports 22a provided in the two electromagnetic on-off valves 22 communicate with the first valve connection port 321a and the second valve connection port 322a, respectively. In other words, the first valve connection port 321a and the second valve connection port 322a that communicate with the inflow port 22a are formed in the support member 21.

[0057] As Figure 3 shown, an internal flow path 40 that connects the can connection port 31a to the first valve connection port 321a and the second valve connection port 322a, respectively, is formed inside each support member 21. The internal flow path 40 is formed by a first left-right flow path PX1, a second left-right flow path PX2, a first upstream-downstream path PZ1, a second upstream-downstream path PZ2, a third upstream-downstream path PZ3, and a fourth upstream-downstream path PZ4.

[0058] The first left - right flow path PX1 extends in the weft insertion direction X and is blocked by the blocking member C at each of the first support side surface 33 and the second support side surface 34. The second left - right flow path PX2 extends in the weft insertion direction X and is blocked by the blocking member C at each of the first support side surface 33 and the second support side surface 34. Along the up - down direction U from the support lower surface 35 towards the support upper surface 36, the first left - right flow path PX1 and the second left - right flow path PX2 are arranged in the order of the first left - right flow path PX1 and the second left - right flow path PX2.

[0059] The first to fourth upstream - downstream flow paths PZ1 to PZ4 extend in the up - down direction U respectively and are blocked by the blocking member C at each of the support lower surface 35 and the support upper surface 36. In the weft insertion direction X from the first support side surface 33 towards the second support side surface 34, the first to fourth upstream - downstream flow paths PZ1 to PZ4 are arranged in the order of the first upstream - downstream flow path PZ1, the second upstream - downstream flow path PZ2, the third upstream - downstream flow path PZ3, and the fourth upstream - downstream flow path PZ4.

[0060] The second upstream - downstream flow path PZ2 and the third upstream - downstream flow path PZ3 are formed in the central portion of the support member 21 in the weft insertion direction X. In addition, the second upstream - downstream flow path PZ2 and the third upstream - downstream flow path PZ3 are formed slightly separated from each other in the weft insertion direction X. Moreover, the second upstream - downstream flow path PZ2 and the third upstream - downstream flow path PZ3 are formed at positions overlapping the tank connection port 31a in the plate thickness direction T of the support member 21.

[0061] In the weft insertion direction X, the first upstream - downstream flow path PZ1 is formed at a position separated from the second upstream - downstream flow path PZ2 towards the first support side surface 33. Moreover, the first upstream - downstream flow path PZ1 is formed at a position overlapping the first valve connection port 321a in the plate thickness direction T of the support member 21. In the weft insertion direction X, the fourth upstream - downstream flow path PZ4 is formed at a position separated from the third upstream - downstream flow path PZ3 towards the second support side surface 34. Moreover, the fourth upstream - downstream flow path PZ4 is formed at a position overlapping the second valve connection port 322a in the plate thickness direction T of the support member 21. The separation distance in the weft insertion direction X between the first upstream - downstream flow path PZ1 and the second upstream - downstream flow path PZ2 is the same as the separation distance in the weft insertion direction X between the third upstream - downstream flow path PZ3 and the fourth upstream - downstream flow path PZ4.

[0062] The first left - right flow path PX1 and the second left - right flow path PX2 are respectively communicated through the first to fourth upstream - downstream flow paths PY1 to PY4 inside the support member 21. In other words, the support member 21 forms an internal flow path 40 within the plate thickness.

[0063] The second upstream and downstream passage PZ2 and the third upstream and downstream passage PZ3 are respectively communicated with the tank connection port 31a. In other words, the second upstream and downstream passage PZ2 and the third upstream and downstream passage PZ3 are respectively opened on the tank side surface 31 via the tank connection port 31a.

[0064] The first upstream and downstream passage PZ1 is communicated with the first valve connection port 321a. In addition, the fourth upstream and downstream passage PZ4 is communicated with the second valve connection port 322a. In other words, the first upstream and downstream passage PZ1 is opened on the valve side surface 32 via the first valve connection port 321a, and the fourth upstream and downstream passage PZ4 is opened on the valve side surface 32 via the second valve connection port 322a.

[0065] The tank connection port 31a is communicated with the first valve connection port 321a via the second upstream and downstream passage PZ2, the first left and right passage PX1, the second left and right passage PX2, and the first upstream and downstream passage PZ1. In addition, the tank connection port 31a is communicated with the second valve connection port 322a via the third upstream and downstream passage PZ3, the first left and right passage PX1, the second left and right passage PX2, and the fourth upstream and downstream passage PZ4.

[0066] A pair of second fixing holes, namely the first valve fixing hole pair BH1 and the second valve fixing hole pair BH2, which are opened on the tank side surface 31 and the valve side surface 32, are formed on each supporting member 21. The first valve fixing hole pair BH1 and the second valve fixing hole pair BH2 are arranged in the weft insertion direction X.

[0067] The first valve fixing hole pair BH1 is formed on the supporting member 21 at a position closer to the first supporting side surface 33 than the central portion in the weft insertion direction X, and the second valve fixing hole pair BH2 is formed on the supporting member 21 at a position closer to the second supporting side surface 34 than the central portion in the weft insertion direction X.

[0068] As Figure 4 shown, the first valve fixing hole pair BH1 is formed on the supporting member 21 in the weft insertion direction X at a position separated by the first valve connection port 321a. In a state where the electromagnetic on-off valve 22 and the supporting member 21 communicate the inflow port 22a with the first valve connection port 321a, the first valve fixing hole pair BH1 faces the pair of first fixing holes H1. The aperture diameter of the first valve fixing hole pair BH1 is the same as the aperture diameter of the first fixing hole H1 formed in the electromagnetic on-off valve 22. In addition, the pitch of the first valve fixing hole pair BH1 is the same as the pitch of the pair of first fixing holes H1. Further, the pitch of the first valve fixing hole pair BH1 is the distance in the weft insertion direction X between the centers of the holes of the first valve fixing hole pair BH1. In addition, the pitch of the pair of first fixing holes H1 is the distance in the weft insertion direction X between the centers of the holes of the first fixing hole H1.

[0069] The second valve fixing hole pair BH2 is formed in a position spaced apart from the second valve connection port 322a in the weft insertion direction X. In a state where the electromagnetic on-off valve 22 and the support member 21 connect the inflow port 22a and the second valve connection port 322a, the second valve fixing hole pair BH2 faces the pair of first fixing holes H1.

[0070] In addition, the electromagnetic on-off valve 22 having the inflow port 22a communicating with the second valve fixing hole pair BH2 is different from the electromagnetic on-off valve 22 having the inflow port 22a communicating with the first valve fixing hole pair BH1. The aperture diameter of the second valve fixing hole pair BH2 is the same as the aperture diameter of the first fixing hole H1 formed in the electromagnetic on-off valve 22. In addition, the pitch of the second valve fixing hole pair BH2 is the same as the pitch of the pair of first fixing holes H1. Further, the pitch of the second valve fixing hole pair BH2 is the distance in the weft insertion direction X between the centers of the respective holes of the second valve fixing hole pair BH2.

[0071] As Figure 3 and Figure 4 shown, a pair of third fixing holes H3 that open on the can side surface 31 and the valve side surface 32 are formed in each support member 21. The pair of third fixing holes H3 are formed in the central portion of the support member 21 in the weft insertion direction X. The pair of third fixing holes H3 are formed in a position spaced apart from the can connection port 31a in the weft insertion direction X.

[0072] Each third fixing hole H3 is formed in a position facing a pair of fourth fixing holes H4 formed in the gas can 10 in a state where the can hole 10a and the can connection port 31a are in communication. The aperture diameter of each third fixing hole H3 is the same as the aperture diameter of each fourth fixing hole H4. The pitch of the pair of third fixing holes H3 is the same as the pitch of the pair of fourth fixing holes H4. Further, the pitch of the pair of third fixing holes H3 is the distance in the weft insertion direction X between the centers of the respective holes of the third fixing hole H3. The pitch of the pair of fourth fixing holes H4 is the distance in the weft insertion direction X between the centers of the respective holes of the fourth fixing hole H4.

[0073] In the support member 21, the aperture diameter of each of the first valve fixing hole pairs BH1 is the same as the aperture diameter of each of the pair of third fixing holes H3. The pitch of the first valve fixing hole pair BH1 is the same as the pitch of the pair of third fixing holes H3. In the support member 21, the aperture diameter of each of the second valve fixing hole pairs BH2 is the same as the aperture diameter of each of the pair of third fixing holes H3. The pitch of the second valve fixing hole pair BH2 is the same as the pitch of the pair of third fixing holes H3.

[0074] Therefore, the diameters of each of the first fixing holes H1, each of the first valve fixing hole pairs BH1, each of the second valve fixing hole pairs BH2, each of the third fixing holes H3, and each of the fourth fixing holes H4 are the same. The distances between a pair of the first fixing holes H1, the distances between the first valve fixing hole pairs BH1, the distances between the second valve fixing hole pairs BH2, the distances between a pair of the third fixing holes H3, and the distances between a pair of the fourth fixing holes H4 are the same.

[0075] <Mounting of the auxiliary nozzle portion to the gas tank based on the support member>

[0076] As Figure 1 and Figure 4 shown, two electromagnetic on-off valves 22 are mounted on the support member 21. Each of the two electromagnetic on-off valves 22 is fixed to the support member 21 by a pair of first fixing pins F1 serving as valve fixing members. The first electromagnetic on-off valve 221, which is one of the two electromagnetic on-off valves 22, is disposed at a position where the inlet port 22a communicates with the first valve connection port 321a, and the second electromagnetic on-off valve 222, which is the other of the two electromagnetic on-off valves 22, is disposed at a position where the inlet port 22a communicates with the second valve connection port 322a. The first electromagnetic on-off valve 221 is fixed to the support member 21 by the first fixing pin F1 inserted into a pair of the first fixing holes H1 and inserted into the first valve fixing hole pair BH1. In addition, the second electromagnetic on-off valve 222 is fixed to the support member 21 by the first fixing pin F1 inserted into a pair of the first fixing holes H1 and inserted into the second valve fixing hole pair BH2. In other words, the electromagnetic on-off valve 22 can be mounted on the support member 21 by the first fixing pin F1 inserted into a pair of the first fixing holes H1 and inserted into the first valve fixing hole pair BH1 and the second valve fixing hole pair BH2. Alternatively, the first fixing pin F1 may be press-fitted into the first valve fixing hole pair BH1 and the second valve fixing hole pair BH2, or the external thread provided on the first fixing pin F1 may be screwed into the internal thread provided on the first valve fixing hole pair BH1 and the second valve fixing hole pair BH2.

[0077] The support member 21 on which the two electromagnetic on-off valves 22 are mounted is fixed to the gas tank 10 by a pair of second fixing pins F2 serving as support fixing members. The pair of second fixing pins F2 are inserted into a pair of the third fixing holes H3 and fixed to a pair of the fourth fixing holes H4. In other words, the support member 21 can be mounted on the gas tank 10 by the pair of second fixing pins F2 inserted into a pair of the third fixing holes H3 and inserted into a pair of the fourth fixing holes H4. In other words, the support member 21 is mounted on the gas tank 10 and supports the electromagnetic on-off valve 22. Alternatively, the second fixing pin F2 may be press-fitted into the fourth fixing hole H4, or the external thread provided on the second fixing pin F2 may be screwed into the internal thread provided on the fourth fixing hole H4.

[0078] In addition, the electromagnetic on-off valve 22 can also be installed on the gas tank 10 without passing through the support member 21. In this case, the electromagnetic on-off valve 22 will insert the first fixing pin F1 inserted into the first fixing hole H1 into the fourth fixing hole H4 in a state where it is disposed at a position where the inflow port 22a communicates with the tank hole 10a. As a result, one electromagnetic on-off valve 22 can be connected to one tank hole 10a.

[0079] <Weaving obtained based on a air-jet loom>

[0080] As Figure 1 and Figure 2 shown, during the operation of the air-jet loom 100, the weft yarn Y is ejected from the main nozzle portion M and travels in the weft insertion direction X in the reed inner passage 16b. During this travel, the plurality of sub-nozzle portions S provided in the weft insertion device 20 respectively eject the compressed air supplied from the gas tank 10 in the traveling direction of the weft yarn Y. Each sub-nozzle portion S performs relay injection from the main nozzle portion M side in the weft insertion direction X. This relay injection pulls the weft yarn Y ejected into the opening of the warp yarns TT. This relay injection is performed by switching the excitation state and the demagnetization state of each electromagnetic on-off valve 22 using a control device (not shown). The supply of the compressed air to each sub-nozzle portion S is performed via the support member 21, the electromagnetic on-off valve 22, and the flexible tube 23.

[0081] The weft yarn Y after being inserted by the weft insertion device 20 is beaten up before weaving N1 by the shaped reed 16 rotated by the locking shaft 12. As a result of this beating-up, the weft yarn Y and the warp yarns TT together form a fabric N.

[0082] [Function of the present embodiment]

[0083] The function of the present embodiment will be described.

[0084] The weft insertion device 20 provided in the air-jet loom 100 ejects compressed air to the weft yarn Y inserted into the reed inner passage 16b through the plurality of sub-nozzle portions S. Each sub-nozzle portion S is connected to the electromagnetic on-off valve 22. Each electromagnetic on-off valve 22 controls the supply of the compressed air from the gas tank 10 to the sub-nozzle portion S. Each electromagnetic on-off valve 22 is supplied with compressed air from the gas tank 10 via the internal flow path 40 of the support member 21. The compressed air accumulated in the gas tank 10 flows into the internal flow path 40 of the support member 21 via the tank hole 10a and the tank connection port 31a. The compressed air flowing into the internal flow path 40 of the support member 21 is supplied to the electromagnetic on-off valve 22 from the first valve connection port 321a and the second valve connection port 322a respectively after passing through the internal flow path 40. In other words, the gas tank 10 provided with the support member 21 can supply compressed air to two electromagnetic on-off valves 22 through one tank hole 10a.

[0085] [Effect of the present embodiment]

[0086] The effects of this embodiment will be described.

[0087] (1) The weft insertion device 20 can connect two electromagnetic on-off valves 22 to one tank hole 10a via the support member 21. In other words, the support member 21 can increase the number of electromagnetic on-off valves 22 installed on the air tank 10. As a result, by installing the support member 21, the weft insertion device 20 can increase the number of electromagnetic on-off valves 22 installed on the air tank 10 without replacing the air tank 10.

[0088] In addition, the weft insertion device 20 can increase the number of electromagnetic on-off valves 22 in the weft insertion direction X without changing the number of sub-nozzles S by using the support member 21. In this case, the number of sub-nozzles S connected to one electromagnetic on-off valve 22 decreases. In other words, compared with the case where the support member 21 is not provided, the weft insertion device 20 can shorten the distance in the weft insertion direction X between each electromagnetic on-off valve 22 in the weft insertion direction X and the sub-nozzle S connected to the electromagnetic on-off valve 22. As a result, the weft insertion device 20 can reduce the pressure loss generated in the compressed air between the electromagnetic on-off valve 22 and the sub-nozzle S.

[0089] (2) The support member 21 is plate-shaped, and the internal flow path 40 is formed within the plate thickness of the support member 21. For example, as in the case where the support member 21 has a buckled shape that is L-shaped when viewed in the weft insertion direction X, the internal flow path 40 can be manufactured more simply compared with the case where the internal flow path 40 buckles according to the buckling of the support member 21. In other words, the above structure facilitates the manufacture of the support member 21.

[0090] In addition, the support member 21 is directly installed on the air tank 10 and supports the electromagnetic on-off valve 22. Moreover, since the support member 21 connects one tank hole 10a to each electromagnetic on-off valve 22 through the internal flow path 40, a branch flow path is branched inside the support member 21.

[0091] As a structure for connecting a plurality of electromagnetic on-off valves 22 to one tank hole 10a, for example, the following structure can be considered: using a support member to support a branch member that branches compressed air to a plurality of electromagnetic on-off valves 22 and connecting it to the air tank 10 through a pipe body or the like in the branch member. In this structure, it is necessary to separately provide a branch member and a support member. Therefore, compared with this structure, in the structure of installing the support member 21 on the air tank 10, the number of components can be reduced, and the man-hours required for installation can be reduced. And, compared with the case of connecting the branch member and the air tank 10 through a pipe body or the like, the installation of the pipe body or the like is not required, and the installation of the support member 21 and the electromagnetic on-off valve 22 of the air tank 10 becomes easier accordingly.

[0092] (3)In the support member 21, the tank connection port 31a, the first valve connection port 321a, and the second valve connection port 322a are formed on the tank side surface 31 and the valve side surface 32 arranged in the plate thickness direction T. Therefore, the support member 21 can form the tank connection port 31a, the first valve connection port 321a, and the second valve connection port 322a, and can change the plate thickness of the support member 21. As a result, by changing the plate thickness of the support member 21 in accordance with the size of the space between the air tank 10 and the arm 12a and accommodating the support member 21 and the electromagnetic on-off valve 22, the enlargement of the weft insertion device 20 of the air jet loom 100 can be suppressed.

[0093] (4)In the support member 21, the first valve connection port 321a and the second valve connection port 322a are formed closer to the support upper surface 36 side than the tank connection port 31a in the vertical direction U of the support member 21. In other words, compared with the case where the electromagnetic on-off valve 22 is installed on the air tank 10 without passing through the support member 21, the distance between the electromagnetic on-off valve 22 installed on the air tank 10 through the support member 21 and the sub-nozzle portion S is short. As a result, the weft insertion device 20 can shorten the distance between the electromagnetic on-off valve 22 and the sub-nozzle portion S, and therefore, the pressure loss generated in the compressed air between the electromagnetic on-off valve 22 and the sub-nozzle portion S can be reduced.

[0094] (5)The air tank 10 directly installs the electromagnetic on-off valve 22 by inserting a pair of first fixing pins F1 inserted into a pair of first fixing holes H1 into a pair of fourth fixing holes H4. Moreover, the support member 21 can be installed on the air tank 10 by inserting a second fixing pin F2 inserted into a pair of third fixing holes H3 into a pair of fourth fixing holes H4. In other words, the pair of fourth fixing holes H4 for installing the support member 21 on the air tank 10 can also be used as the fixing holes for directly installing the electromagnetic on-off valve 22 on the air tank 10. Therefore, new holes do not need to be provided in the air tank 10. As a result, the weft insertion device 20 of the air jet loom 100 can install the support member 21 without processing the air tank 10 on which the electromagnetic on-off valve 22 is installed.

[0095] (6) In the support member 21, the separation distance in the weft insertion direction X between the first upstream and downstream passage PZ1 and the second upstream and downstream passage PZ2 is the same as the separation distance in the weft insertion direction X between the third upstream and downstream passage PZ3 and the fourth upstream and downstream passage PZ4. Therefore, the distance in the weft insertion direction X from the tank connection port 31a to the first valve connection port 321a is the same as the distance in the weft insertion direction X from the tank connection port 31a to the second valve connection port 322a. In other words, the distances through which the compressed air supplied to the two electromagnetic on-off valves 22 supported by the support member 21 pass in the internal flow path 40 are equal. In other words, the pressure losses generated in the compressed air supplied to the two electromagnetic on-off valves 22 are equal. Therefore, the weft insertion device 20 can increase the number of electromagnetic on-off valves 22 installed in the air tank 10 and uniformly maintain the pressure of the compressed air supplied from each electromagnetic on-off valve 22. As a result, the weft insertion device 20 can increase the number of electromagnetic on-off valves 22 it has and perform the weft insertion of the weft yarn Y with high precision.

[0096] [Modification example]

[0097] In addition, the above-described embodiment can be modified as follows. The above-described embodiment and the following modification examples can be implemented in combination with each other within a range where there is no technical contradiction.

[0098] ○ It is also possible that the support member 21 has, in addition to the first valve connection port 321a and the second valve connection port 322a, a valve connection port communicating with the inflow port 22a of the electromagnetic on-off valve 22. In this case, valve fixing hole pairs different from the first valve fixing hole pair BH1 and the second valve fixing hole pair BH2 are provided in the support member 21.

[0099] ○ The diameters of the pair of third fixing holes H3 and the pair of fourth fixing holes H4 may also be different and the pitches may also be different. In this case, holes different from the pair of fourth fixing holes H4 are provided in the air tank 10 for installing the support member 21.

[0100] ○ Any one of the dimensions of the support member 21 in the plate thickness direction T, in the weft insertion direction X, and in the up-down direction U may be appropriately changed. In other words, the support member 21 may not be plate-shaped.

[0101] ○ As Figure 5 shown, the support member 21 may also be decomposable. For example, the support member 21 includes: a first forming member A1 and a second forming member A2 arranged in the plate thickness direction T, a sealing member A3 for sealing between the first forming member A1 and the second forming member A2, and a plurality of coupling pins A4 for attaching the second forming member A2 to the first forming member A1. The support member 21 is formed by facing the first forming member A1 and the second forming member A2 in the plate thickness direction T.

[0102] The support member 21 has a tank side surface 31 on a surface of the first forming member A1 that is different from the surface facing the second forming member A2. In other words, a tank connection port 31a is formed on the first forming member A1. The tank connection port 31a opens on two surfaces in the plate thickness direction of the first forming member A1.

[0103] The support member 21 has a valve side surface 32 on a surface of the second forming member A2 that is different from the surface facing the first forming member A1. In other words, a first valve connection port 321a and a second valve connection port 322a are formed on the second forming member A2. The first valve connection port 321a and the second valve connection port 322a each open on two surfaces in the plate thickness direction of the second forming member A2.

[0104] A flow path dividing space A5 is formed in the support member 21. The flow path dividing space A5 is formed by a first dividing space A51 and a second dividing space A52. The first dividing space A51 is demarcated by a first dividing portion A511 of the first forming member A1. In other words, the first dividing space A51 is formed on the first forming member A1. The first dividing space A51 is recessed from the surface of the first forming member A1 that faces the second forming member A2. The first dividing space A51 opens at the surface where the first dividing portion A511 is formed and communicates with the tank connection port 31a. In other words, the tank connection port 31a is formed on the first forming member A1, and the first dividing space A51 that communicates with the tank connection port 31a is formed.

[0105] The second dividing space A52 is demarcated by a second dividing portion A521 of the second forming member A2. In other words, the second dividing space A52 is formed on the second forming member A2. The second dividing space A52 is recessed from the surface of the second forming member A2 that faces the first forming member A1. The second dividing space A52 opens at the surface where the second dividing portion A521 is formed and communicates with the first valve connection port 321a and the second valve connection port 322a. In other words, the first valve connection port 321a and the second valve connection port 322a are formed on the second forming member A2, and the second dividing space A52 that communicates with the first valve connection port 321a and the second valve connection port 322a is formed.

[0106] The first forming member A1 and the second forming member A2 are joined by a plurality of coupling pins A4 such that the first dividing space A51 and the second dividing space A52 form the flow path dividing space A5. The tank connection port 31a communicates with the first valve connection port 321a and the second valve connection port 322a through the flow path dividing space A5. In other words, the internal flow path 40 is formed through the flow path dividing space A5.

[0107] Alternatively, it is also possible that the second forming member A2 does not have the second dividing portion A521 and the second dividing space A52. In this case, the second forming member A2 closes the first dividing space A51. Then, the flow path dividing space A5 is formed in the first forming member A1. Therefore, the internal flow path 40 is divided by the second forming member A2 closing the flow path dividing space A5.

[0108] In addition, it is also possible that the first forming member A1 does not have the first dividing portion A511 and the first dividing space A51. In this case, the first forming member A1 closes the second dividing space A52. Moreover, the flow path dividing space A5 is formed in the second forming member A2. Therefore, the internal flow path 40 is divided by the first forming member A1 closing the flow path dividing space A5. In other words, the flow path dividing space A5 is formed in at least one of the first forming member A1 and the second forming member A2, and the internal flow path 40 is divided by at least the other of the first forming member A1 and the second forming member A2 closing the flow path dividing space A5.

[0109] In the above structure, the internal flow path 40 is formed by the first forming member A1 and the second forming member A2. Compared with the case of forming a flow path inside a support member 21 formed of a single member, this makes it easier to form the internal flow path. And there is no need to make the holes formed in the support member 21 into flow paths as in the case of forming the support member 21 of a single member. Therefore, for example, by forming the flow path dividing space A5 into a concave portion, an internal flow path 40 with a quadrilateral cross-sectional shape can be formed. As a result, compared with the case where the support member 21 is formed of a single member, it is easier to form the path and cross-sectional shape of the internal flow path 40. In addition, in the above structure, a cavity that opens at the tank connection port 31a, the first valve connection port 321a, and the second valve connection port 322a can be formed inside the support member 21. In this case, compared with the case where the support member 21 is formed of a single member, the cross-section of the internal flow path 40 can be increased. As a result, the pressure loss of the compressed air in the internal flow path 40 can be reduced.

[0110] ○ Alternatively, the outer surface of the support member 21 is not only composed of the tank side surface 31, the valve side surface 32, the first support side surface 33, the second support side surface 34, the support lower surface 35, and the support upper surface 36. For example, as Figure 6 shown, it is also possible that the support member 21 has an inclined surface D between the valve side surface 32 and the support upper surface 36.

[0111] The inclined surface D is inclined with respect to the valve side surface 32 and also inclined with respect to the support upper surface 36. Further, in the vertical direction U of the air-jet loom 100, the inclined surface D faces the direction in which the passage 16b inside the reed is located when viewed from the support member 21. The first valve connection port 321a and the second valve connection port 322a are respectively formed on the inclined surface D. In other words, the support member 21 has an inclined surface D facing the direction of the passage 16b inside the reed, and the electromagnetic on-off valve 22 is supported on the inclined surface D. The electromagnetic on-off valve 22 is disposed on the inclined surface D such that the inlet ports 22a communicate with the first valve connection port 321a and the second valve connection port 322a respectively. The internal flow path 40 bends inside the support member 21.

[0112] The inclined surface D faces the direction of the passage 16b inside the reed, and thus faces the sub-nozzle portion S. In other words, the support member 21 is provided with the inclined surface D, whereby the distance between the electromagnetic on-off valve 22 and the sub-nozzle portion S can be made closer and the electromagnetic on-off valve 22 can be oriented in the direction of the sub-nozzle portion S. As a result, the distance through which the compressed air flows between the electromagnetic on-off valve 22 and the sub-nozzle portion S becomes shorter, and thus the pressure loss generated until the compressed air reaches the sub-nozzle portion S is reduced.

[0113] ○ It is also possible that the support member 21 does not make the tank side surface 31 and the valve side surface 32 opposite surfaces in the plate thickness direction T. For example, as Figure 7 shown, it is also possible that the tank side surface 31 and the valve side surface 32 respectively face the direction of the air tank 10. In this case, the support member 21 includes a support member main body portion E1 and a support member connection portion E2.

[0114] The support member main body portion E1 is plate-shaped on which the electromagnetic on-off valve 22 is mounted. The support member main body portion E1 is plate-shaped with its long side extending in the weft insertion direction X and its short side extending in the vertical direction U. Further, the support member main body portion E1 is plate-shaped with a plate thickness in the front-rear direction F.

[0115] The support member connection portion E2 is plate-shaped and extends from the support member main body portion E1 toward the air tank 10. Further, the support member connection portion E2 is plate-shaped with a plate thickness in the vertical direction U. The support member 21 has the tank side surface 31 as the surface facing the air tank 10 in the surface of the support member connection portion E2. In other words, the tank connection port 31a is formed in the support member connection portion E2. Further, the support member 21 has the valve side surface 32 as the surface facing the direction of the air tank 10 in the surface of the support member main body portion E1. In other words, a plurality of valve connection ports (not shown) are formed in the support member main body portion E1.

[0116] Internal flow paths 40 are respectively formed in the support member main body portion E1 and the support member connection portion E2. A main body portion flow path E3 is formed in the support member main body portion E1, and a connection portion flow path E4 is formed in the support member connection portion E2. The support member main body portion E1 and the support member connection portion E2 are connected on the valve side surface 32 in such a manner that the main body portion flow path E3 communicates with the connection portion flow path E4.

[0117] According to the above structure, compared with the case where the electromagnetic on-off valve 22 mounted on the support member 21 is directly mounted on the air tank 10, the distance to the corresponding sub-nozzle portion S becomes closer. In addition, the number of buckles of the flexible tube 23 generated when connecting the electromagnetic on-off valve 22 and the sub-nozzle portion S at different positions in the up-down direction U of the air-jet loom 100 can be reduced. As a result, in the above structure, the pressure loss inside the flexible tube 23 can be reduced in the compressed air sent from the electromagnetic on-off valve 22 to the sub-nozzle portion S.

Claims

1. A weft insertion device for an air jet loom, provided on the air jet loom for inserting weft yarn into a reed inner passage through a main mouth, and comprising: A plurality of auxiliary nozzles are provided in the weft insertion direction of the weft yarn, and spray compressed air toward the weft yarn inserted into the reed inner passage; an air tank storing the compressed air ejected from the auxiliary nozzle and having a plurality of tank holes formed in the weft insertion direction; an electromagnetic on-off valve for controlling the supply of the compressed air from the air tank to the sub-nozzle, having an inlet for the compressed air to flow in, and a plurality of electromagnetic on-off valves provided in the weft insertion direction; and a supporting member mounted on the gas tank and supporting the electromagnetic on-off valve, The weft insertion device of the air jet loom is characterized in that: The support member is formed with a tank connection port communicating with one of the tank holes, and is also formed with a plurality of valve connection ports communicating with the inlet. An internal flow path that connects the tank connection port and the plurality of valve connection ports is formed inside the support member.

2. The weft insertion device of the air jet loom according to claim 1, characterized in that: The supporting member comprises: a tank side surface having the tank connection port; and a valve side surface which is a surface different from the tank side surface and has a plurality of the valve connection ports, The support member is plate-shaped, and the tank-side surface and the valve-side surface are opposite surfaces to each other in a plate thickness direction, and the internal flow path is formed within the plate thickness.

3. The weft insertion device of the air jet loom according to claim 1 or 2, characterized in that: A pair of first fixing holes is formed on the electromagnetic on-off valve. A pair of second fixing holes and a pair of third fixing holes different from the pair of second fixing holes are formed on the supporting member. A pair of fourth fixing holes are formed on the gas tank. The electromagnetic on-off valve can be mounted on the support member via a valve fixing member inserted into the pair of first fixing holes and inserted into the pair of second fixing holes. The support member can be mounted on the gas tank by a support fixing member inserted into the pair of third fixing holes and inserted into the pair of fourth fixing holes. The first fixing hole, the second fixing hole, the third fixing hole and the fourth fixing hole have the same hole diameter, and the spacing between the pair of first fixing holes, the pair of second fixing holes, the pair of third fixing holes and the fourth fixing hole are consistent.

4. The weft insertion device of the air jet loom according to claim 2, characterized in that: The supporting member comprises: a first forming member on which the tank connection port is formed; and The second forming member is formed with the plurality of valve connection ports, and The supporting member is formed by making the first forming member and the second forming member face each other in the plate thickness direction. A flow path partitioning space is formed on at least one of the first forming member and the second forming member, The internal flow path is defined by the flow path defining space being blocked by at least the other of the first forming member and the second forming member.

5. The weft insertion device of the air jet loom according to claim 1 or 2, characterized in that: The support member has an inclined surface facing the direction of the reed in-passage, the electromagnetic on-off valve is supported by the inclined surface, and the plurality of valve connection ports open at the inclined surface.

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