Crank-type shedding device for water-jet looms

Abstract

To provide a crank-type shedding device for a water jet loom, having a structure in which a lubricant hardly drops on a water receiving pan.SOLUTION: In a crank-type shedding device for a water jet loom in which a shedding lever attached to a swing shaft and a heddle frame are connected by a push-up rod, the shedding lever is formed of a lever part which is attached to the swing shaft and a connection part which has a pair of side walls for supporting a connecting pin inserted into a bearing part of the push-up rod and front and rear end walls facing each other in a longitudinal direction of the lever part. The crank-type shedding device comprises a supply part which supplies a lubricant to the bearing part. The connection part has a bottom wall which closes a space defined by the side walls and the end walls. The shedding lever has: a discharge passage which is used for discharging the lubricant, is opened to the swing shaft side of the lever part in the longitudinal direction, and communicates with a discharge hole opened to the space; and a closing member which closes the opening of the discharge passage and releases the closed state.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a crank-type shedding device that is provided on a water-jet loom and in which a shedding lever attached to a swinging shaft and a heald frame are connected by a push-up rod, the shedding lever being composed of a lever portion attached to the swinging shaft and a connecting portion having a pair of side walls that support a connecting pin that is inserted into a bearing portion of the push-up rod and front and rear end walls that face each other in the longitudinal direction of the lever portion, and the crank-type shedding device for a water-jet loom is provided with a supply portion for supplying lubricant to the bearing portion. [Background technology]

[0002] A known shedding device for a water jet loom is a crank-type shedding device that uses a crank mechanism driven by the main shaft of the loom as a driving means to move the heald frame up and down. An example of such a crank-type shedding device is disclosed in Patent Document 1.

[0003] The crank-type shedding device disclosed in Patent Document 1 includes a swing shaft connected to a crank mechanism driven by the main shaft of the loom, a shedding lever attached to the swing shaft, and a push-up rod connected to the shedding lever and the heald frame. In the crank-type shedding device, the swing shaft is driven in reverse reciprocating motion by the crank mechanism, thereby driving the heald frame connected to the swing shaft via the shedding lever and push-up rod back and forth in the up and down direction.

[0004] An example of an opening lever in such a crank-type opening device is disclosed in Patent Document 2. The opening lever disclosed in Patent Document 2 is composed of a lever portion attached to a swing shaft and a connecting portion to which a boost rod is connected. The connecting portion is formed to have a pair of side walls, and the space between the both walls is a space that is open above and below. A connecting pin is provided in the connecting portion so as to span between the both walls. The connecting pin is inserted into a bearing portion of the boost rod between the both walls, thereby connecting the connecting portion and the boost rod. In the crank-type opening device, the opening lever is connected to the boost rod at the connecting portion, so that the boost rod (heald frame) is supported by the opening lever. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Publication number 7-26374 [Patent Document 2] Japanese Utility Model Application Publication No. 5-66081 Summary of the Invention [Problem to be solved by the invention]

[0006] In a crank-type shedding device, the bearing of the push-up rod slides against the connecting pin as the swinging shaft (shedding lever) swings, and the bearing is lubricated with a lubricant such as grease. In a water-jet loom, the lubricant in the bearing is affected by the water jets that accompany weft insertion, so it is necessary to periodically (e.g., when the loom is finished) supply new lubricant to the bearing. When new lubricant is supplied to the bearing, the old lubricant that was previously in the bearing is expelled from the bearing.

[0007] Furthermore, in the crank-type shedding device disclosed in Patent Document 2 (hereinafter referred to as the "conventional device"), as described above, the space between both side walls at the connecting portion of the shedding lever where the bearing portion of the push-up rod is disposed is an open space below. Therefore, in this conventional device, when lubricant is supplied to the bearing portion as described above and old lubricant is discharged outside the bearing portion, the discharged old lubricant falls from that space. Furthermore, such falling of old lubricant can also occur during weaving on the loom as the push-up rod swings.

[0008] In addition, in a typical water jet loom, a water receiving section (water receiving pan) that receives the water sprayed from the weft insertion nozzle is provided below the shedding lever. Therefore, in a conventional loom, the lubricant that falls as described above is received in the water receiving pan. As a result, in a conventional loom, the water received in the water receiving pan contains a large amount of lubricant (oil). For this reason, in a typical weaving factory, the water received in the water receiving pan is treated as wastewater within the factory, but because the water contains a large amount of oil, this wastewater treatment requires a lot of effort and expense.

[0009] In view of the above-described crank-type shedding devices for conventional water jet looms, an object of the present invention is to provide a crank-type shedding device having a configuration that makes it less likely for lubricant to fall onto the water receiving pan. [Means for solving the problem]

[0010] The present invention is based on a crank-type shedding device that is provided on a water-jet loom and in which a shedding lever attached to a swinging shaft and a heald frame are connected by a push-up rod, and in particular, the shedding lever is composed of a lever portion that is attached to the swinging shaft and a connecting portion that has a pair of side walls that support a connecting pin that is inserted into a bearing portion of the push-up rod and end walls that face each other in the longitudinal direction of the lever portion, and is equipped with a supply portion for supplying lubricant to the bearing portion.

[0011] Furthermore, the present invention is characterized in that the connecting portion has a bottom wall that closes the space defined by the side wall and the end wall, and the opening lever has a discharge passage used to discharge the lubricant, which opens toward the swing axis side of the lever portion in the longitudinal direction and communicates with a discharge hole that opens into the space, and a closing member that closes the opening of the discharge passage and is capable of opening the closed state.

[0012] In the crank-type opening device according to the present invention, the discharge hole may be formed in the bottom wall. Furthermore, the discharge passage may be formed so as to open on a plane intersecting the longitudinal direction of the opening lever. Furthermore, the lever portion may be composed of a main body portion attached to the pivot shaft and having a connecting portion continuous therewith, and a passage-forming member attached to the main body portion to form the discharge passage. [Effects of the Invention]

[0013] According to the crank-type opening device of the present invention, the connecting portion of the opening lever is defined by side walls and end walls and has a bottom wall that closes the space in which the bearing is disposed. As a result, in this crank-type opening device, old lubricant that falls from the bearing as the lubricant is supplied is received by the bottom wall. Furthermore, the opening lever is configured to have a drain passage that communicates with a drain hole that opens to the space and the pivot shaft side of the lever in the longitudinal direction. As a result, the old lubricant received by the bottom wall is guided by the drain passage to the pivot shaft side of the lever. Therefore, in this crank-type opening device, lubricant is less likely to fall into the water receiving pan as it is supplied to the bearing.

[0014] Furthermore, the crank-type shedding device has a closing member that is capable of closing the opening of the discharge passage and is capable of releasing the closed state. Therefore, by closing the opening of the discharge passage with the closing member during weaving, it is possible to prevent lubricant from scattering from the opening of the discharge passage as the shedding lever swings. When lubricant is supplied to the bearing, the closing state of the closing member is released, allowing the lubricant that has been guided to the swing shaft side of the lever as described above to be discharged from the opening of the discharge passage.

[0015] In this way, according to the present invention, not only is it less likely that the lubricant will fall onto the water receiving pan when it is supplied to the bearing, but it is also possible to prevent the lubricant from scattering from the opening lever that swings during weaving. As a result, compared to conventional devices, the present invention can prevent oil from getting into the water received in the water receiving pan as much as possible, thereby reducing the labor and cost required for wastewater treatment in weaving factories. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a perspective view showing a crank-type shedding device in a water jet loom to which the present invention is applied. [Figure 2] FIG. 2 is an enlarged view of a top surface portion in FIG. [Figure 3] FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. [Figure 4] FIG. 4 is a view taken along the arrow B in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, one embodiment (the present embodiment) of a crank type shedding device for a water jet loom according to the present invention will be described with reference to FIGS.

[0018] 1 shows a crank-type shedding device 1 for a water-jet loom, which is configured to move a heald frame 9 up and down using a crank mechanism 6 driven by the main shaft (not shown) of the water-jet loom as a driving source. The crank-type shedding device 1 includes two swing shafts 3, 3 installed between a pair of side frames 2a, 2b of a loom frame 2, and each swing shaft 3 is connected to the corresponding heald frame 9 via a pair of shedding levers 4, 4 and push-up rods 5, 5 fixed thereto. The swing shafts 3, 3 are arranged in parallel one above the other, and are rotatably supported at both ends relative to the side frames 2a, 2b.

[0019] Further, crank mechanisms 6 for driving the oscillating shafts 3 are provided on each of the pair of side frames 2a, 2b in a one-to-one correspondence with each oscillating shaft 3. Each crank mechanism 6 has an eccentric drive unit 6a, which is rotationally driven by the main shaft, connected to the corresponding oscillating shaft 3 via a connecting rod 6b connected to the eccentric drive unit 6a and a swing lever 6c that connects the connecting rod 6b to the oscillating shaft 3. In the crank-type shedding device 1, each oscillating shaft 3 is driven to swing back and forth by the corresponding crank mechanism 6, so that the heald frames 9 connected to each oscillating shaft 3 are driven to swing back and forth in the up and down direction.

[0020] Each swing shaft 3 and heald frame 9 are connected by a pair of opening levers 4, 4 attached to each swing shaft 3, and a push-up rod 5 connected to each swing lever 4 and to the heald frame 9. Each opening lever 4 is made up of a lever portion 41 that is attached to the swing shaft 3, and a connecting portion 42 to which the push-up rod 5 is connected.

[0021] The lever portion 41 has a through hole 4d for inserting the swing shaft 3. The through hole 4d is formed at one end of the longitudinal direction of the opening lever 4 so as to penetrate the lever portion 41 in a direction perpendicular to the longitudinal direction (hereinafter referred to as the "width direction"). The lever portion 41 is also provided with a split clamping mechanism for fixing the opening lever 4 to the swing shaft 3 with the swing shaft 3 inserted into the through hole 4d.

[0022] Furthermore, connecting portion 42 is provided on the other end side in the longitudinal direction relative to lever portion 41 so as to be continuous with lever portion 41 in the longitudinal direction. Connecting portion 42 has peripheral walls formed by a pair of end walls (front wall 42a and rear wall 42b) opposing each other in the longitudinal direction and a pair of side walls 42c, 42c opposing each other in the width direction, and is configured so as to form a rectangular space 40 inside in a plan view.

[0023] Furthermore, the connecting portion 42 has a connecting pin 44 disposed in the space 40. The connecting pin 44 is provided between a pair of opposing side walls 42c, 42c in a manner supported by both side walls 42c, 42c. In other words, the connecting pin 44 is provided in a manner spanning between both side walls 42c, 42c. The crank-type shedding device 1 of this embodiment is configured so that three heald frames 9 (three push-up rods 5) are connected to each shedding lever 4. Therefore, three connecting pins 44 are provided in the connecting portion 42.

[0024] The push-up rod 5 is a shaft-shaped member connected to the opening lever 4 and the corresponding heald frame 9, and has a bearing 11 connected to the opening lever 4 at one end in the axial direction. The bearing 11 is formed in a cylindrical shape with a through hole that passes through in a direction perpendicular to the axial direction. The opening lever 4 and the bearing 11 are connected by inserting a connecting pin 44 of a connecting portion 42 into the through hole. Therefore, the diameter of the through hole is large enough to allow the connecting pin 44 to pass through. In this embodiment, a plain bearing 12 is fitted into the through hole of the bearing 11, and the bearing 11 and the connecting pin 44 are connected via the plain bearing 12.

[0025] Furthermore, the push-up rod 5 is provided with a communication hole 15a that opens onto the inner circumferential surface of the through hole in the bearing portion 11 and extends from the bearing portion 11 in the axial direction. The end of this communication hole 15a opposite the bearing portion 11 is bent in a direction perpendicular to the axial direction and is formed to open onto the outer circumferential surface of the push-up rod 5. The communication hole 15a has a female thread formed at the end that opens onto the outer circumferential surface, and a grease nipple 15b is attached by being threaded onto the female thread. The communication hole 15a and the grease nipple 15b are parts that supply lubricant into the bearing portion 11 and correspond to the supply part referred to in the present invention.

[0026] Furthermore, in bearing portion 11, sliding bearing 12 also has a communication hole 12a drilled therein so as to communicate with communication hole 15a. As a result, when lubricant is supplied from grease nipple 15b, the lubricant is supplied to the inner circumferential surface side of sliding bearing 12 via communication hole 15a and communication hole 12a of sliding bearing 12.

[0027] In order to prevent the lubricant from scattering from above the connecting part 42 as the shedding lever 4 swings during weaving, a bellows cover 43 is provided on the shedding lever 4. The bellows cover 43 is made of a rubber material and is attached to the connecting part 42 in such a way as to cover the upper part of the rectangular space 40.

[0028] The water jet loom also includes a water receiving pan 2e (Fig. 1) that receives water jetted from the weft insertion nozzle. The water receiving pan 2e is a bathtub-shaped member with a rectangular bottom. The water receiving pan 2e is located below the two swing shafts 3, 3, between the front bottom stay 2c and the rear bottom stay 2d, which are lower beams of the loom frame 2. In plan view, the water receiving pan 2e extends between the pair of side frames 2a, 2b in the weaving width direction, and between the front bottom stay 2c and the rear bottom stay 2d in the longitudinal direction of the loom.

[0029] In the crank-type shedding device for a water jet loom described above, the present invention is configured such that the connecting portion 42 has a bottom wall for closing the lower portion of the space 40 defined by the pair of end walls (front wall 42a and rear wall 42b) and the pair of side walls 42c, 42c, and the shedding lever 4 has a discharge passage communicating with a discharge hole opening into the space 40, and a closing member for closing the opening of the discharge passage. The present embodiment described below is an example in which the discharge passage in the shedding lever 4 is provided so as to open on a plane perpendicular to the longitudinal direction of the lever portion 41, and the lever portion 41 is composed of a main portion and a passage-forming member for forming the discharge passage. The crank-type shedding device of this embodiment equipped with such a shedding lever 4 is described in detail below.

[0030] In the opening lever 4, the connecting portion 42 is configured to have, in addition to the pair of end walls (front wall 42a and rear wall 42b) and pair of side walls 42c, 42c that define the space 40, a bottom wall 42d that also closes the space 40 on the lower side (defines the lower side of the space 40). That is, the connecting portion 42, whose periphery is formed by the front wall 42a, rear wall 42b, and pair of side walls 42c, 42c, is configured so that in addition to its periphery, the lower side is also closed by the bottom wall 42d. As described above, the bellows cover 43 is attached to the connecting portion 42, and the upper side of the connecting portion 42 is covered by the bellows cover 43.

[0031] The bottom wall 42d is formed so that a portion on the lever portion 41 side (front wall 42a side) in the longitudinal direction is thickened to form a thick portion 42f that protrudes downward more than the remaining portion. A groove 42f1 is formed in the thick portion 42f, opening into its lower surface and the end surface on the lever portion 41 side. Furthermore, a through-hole 42g is formed in the thick portion 42f, opening into the bottom surface of the groove 42f1 and penetrating the bottom wall 42d. As a result, the groove 42f1 is in communication with the space 40 via the through-hole 42g.

[0032] The lever portion 41 is attached to the pivot shaft 3 and is mainly composed of a main portion 41a, which is a portion of the lever portion 41 that is continuous with the connecting portion 42. The through hole 4d and the split clamping mechanism are provided at the end of the main portion 41a opposite the connecting portion 42 in the longitudinal direction. The main portion 41a is formed so that an end face 45 of the end opposite the connecting portion 42 in the longitudinal direction is a flat surface that is perpendicular to the longitudinal direction. The main portion 41a and the connecting portion 42 are continuous with each other such that a lower surface 41a2 of the main portion 41a and a lower surface of a thick portion 42f of a bottom wall 42d of the connecting portion 42 are at the same position in the thickness direction of the bottom wall 42d.

[0033] The main body 41a has a groove 41a1 that opens to the lower surface 41a2 and the end surface 45 and extends in the longitudinal direction. The groove 41a1 is formed so that the end on the connecting portion 42 side is continuous with the groove 42f1 of the connecting portion 42. Furthermore, the end of the groove 41a1 on the bottom surface facing the end surface 45 is formed as an inclined surface 41a3 that slopes upward.

[0034] The lever portion 41 is also provided with a passage-forming member 41b that closes the opening on the lower surface of the groove 41a1 of the main body portion 41a and, together with the groove 41a1, forms a discharge passage for discharging the lubricant. The passage-forming member 41b is an L-shaped member formed by bending a rectangular plate material with its long sides sufficiently longer than its short sides at a right angle. The bent portion 41b3 is located at the end of the short side of the plate material, and the portion of the passage-forming member 41b closer to one end than the bent portion 41b3 has a sufficiently larger area than the portion of the other end. The portion of the passage-forming member 41b on one end side serves as the closing portion 41b1 that closes the groove 41a1 as described above, and the portion on the other end side serves as the mounting portion 41b2 that is attached to the side surface of the main body portion 41a.

[0035] The dimension of the passage forming member 41b in the direction of the long side is approximately equal to the sum of the length dimensions of the main body portion 41a and the thick-walled portion 42f in the longitudinal direction. Also, the dimension of the blocking portion 41b1 in the direction of the short side is approximately equal to the dimension of the main body portion 41a in the width direction.

[0036] The passage-forming member 41b is attached to the main body 41a by threading a plurality of fixing bolts into corresponding female screw holes formed in the main body 41a, with the closing portion 41b1 abutting against the underside 41a2 of the main body 41a and the mounting portion 41b2 abutting against the side surface of the main body 41a. The attachment is performed by aligning one edge of the passage-forming member 41b in the direction of the long side with the longitudinal end face 45 of the main body 41a. As a result, the opening lever 4 is configured such that the lower portions of the grooves 41a1 and 42f1 are closed by the closing portion 41b1 of the passage-forming member 41b, forming a passage 48 therein. The passage 48 communicates with the space 40 via the through-hole 42g on the connecting portion 42 side and opens to the end face 45 on the oscillating shaft 3 side.

[0037] In addition, the opening lever 4 is provided with a blocking member 47 for blocking the opening of the passage 48. As described above, the groove 41a1 in the lever portion 41 (main body portion 41a) has an inclined surface 41a3 at the end of its bottom surface on the side of the end face 45. That is, the passage 48 has a wedge-shaped opening, which is the portion that opens to the end face 45. Therefore, the blocking member 47 is a wedge-shaped member sized to be fitted into and block the opening of the passage 48. The blocking member 47 is made of a rubber material and is fitted into the opening of the passage 48 with some elastic deformation. Therefore, the blocking member 47 maintains the passage 48 in a closed state due to its elasticity and can be easily removed.

[0038] According to the crank type opening device 1 configured as above, the connecting portion 42 of the opening lever 4, whose periphery is made up of the front wall 42a, the rear wall 42b, and the pair of side walls 42c, 42c, is closed not only around but also below by the bottom wall 42d. As a result, in the crank type opening device 1, old lubricant that falls from the bearing portion 11 as lubricant is supplied from the grease nipple 15b is received by the bottom wall 42d.

[0039] Furthermore, the opening lever 4 has a passage 48 formed therein, which communicates with the space 40 via the through-hole 42g on the connecting portion 42 side and opens to the end face 45 on the swing shaft 3 side. As a result, old lubricant received by the bottom wall 42d passes through the through-hole 42g and falls into the passage 48. Therefore, the old lubricant does not fall directly below the connecting portion 42 (towards the water receiving pan 2e), but is received by the passage 48 which opens to the outside only at the end face 45 on the swing shaft 3 side.

[0040] The opening of passage 48 on the end face 45 side is closed by closing member 47, and in this closed state, old lubricant accumulates in passage 48. Then, by removing closing member 47 and opening the opening as needed, it becomes possible to drain the old lubricant in passage 48. For example, by preparing a container or the like to allow an operator to catch the old lubricant drained from passage 48, it is possible to effectively prevent the lubricant from falling into water receiving pan 2e. Furthermore, since the opening is kept closed by closing member 47 during weaving, it is possible to prevent the lubricant from scattering from the opening of passage 48 as opening lever 4 is swung.

[0041] As described above, in the crank-type opening device 1 of this embodiment, the passage 48 that opens on the swing shaft 3 side of the lever portion 41 and communicates with the through-hole 42g that opens into the space 40 in the connecting portion 42 is used to discharge the lubricant from the opening lever 4. Therefore, the passage 48 corresponds to the discharge passage as defined in the present invention, and the through-hole 42g corresponds to the discharge hole as defined in the present invention.

[0042] Furthermore, the opening lever 4 has a through hole 42g formed in the bottom wall 42d that opens into the space 40 inside the connecting portion 42. As a result, in the crank-type opening device 1, old lubricant received by the bottom wall 42d as described above passes through the through hole 42g and easily falls into the passage 48, making it easier for the old lubricant to be discharged from the space 40 toward the passage 48.

[0043] Further, the shedding lever 4 is formed so that the passage 48 opens at the end surface 45, and the surface of the shedding lever 4 where the passage 48 opens is configured to be a plane perpendicular to the longitudinal direction. As a result, in the crank-type shedding device 1, an operator who supplies lubricant to the bearing portion 11 can easily access the blocking member 47 attached to the opening of the passage 48 from the winding side in the front-to-rear direction of the water jet loom, and the operation of removing the blocking member 47 from the opening of the passage 48 to unblock the passage 48 is easy.

[0044] Furthermore, the opening lever 4 is configured such that the lower portions of the grooves 41a1 and 42f1 are closed by the closing portion 41b1 of the passage forming member 41b, thereby forming a passage 48 therein, and the lever portion 41 is configured by the main body portion 41a, which is the portion attached to the swing shaft 3, and the passage forming member 41b, which is the portion attached to the main body portion 41a to form the passage 48. This makes it easier to manufacture the opening lever 4 with the passage 48 formed therein in the crank type opening device 1.

[0045] The above describes one embodiment of a crank-type shedding device for a water jet loom according to the present invention, but the crank-type shedding device for a water jet loom according to the present invention is not limited to the above embodiment and can be implemented in the following modified examples.

[0046] (1) Regarding the structure for discharging old lubricant (discharge structure), in the above-described embodiment, the portion of the discharge passage 48 on the lever portion 41 side is formed by the groove 41a1 and the blocking member 41b1, and in order to extend the discharge passage 48 to the connecting portion 42 side, the lever portion 41 side of the bottom wall 42d of the connecting portion 42 is formed as a thick portion 42f, and the groove 42f1 is formed in the thick portion 42f. As a result, the discharge passage 48 is extended to the thick portion 42f on the connecting portion 42 side. In addition, a discharge hole 42g is formed so as to open into the groove 42f1 in the connecting portion 42. However, the discharge structure is not limited to this configuration.

[0047] For example, the discharge structure may be configured so that the discharge passage extends to the vicinity of the rear wall at the connecting portion. In this case, the connecting portion has a bottom wall whose thickness is the same as that of the thick portion 42f in the above embodiment, and a groove in the bottom wall that is continuous with the groove 41a1 on the lever portion 41 extends to the vicinity of the rear wall. Then, similar to groove 42f1 in the above embodiment, the lower portion of the groove may be blocked by a blocking portion. In this case, the discharge hole may be formed between the front wall 42a and the rear wall 42b, closer to the rear wall 42b than the position in the above embodiment. In other words, the longitudinal position of the discharge hole is not limited to the position in the above embodiment, and may be set at an appropriate position relative to the discharge passage.

[0048] Furthermore, the discharge structure is not limited to a configuration in which the discharge passage is connected to the space within the connecting portion through a discharge hole formed in the bottom wall of the connecting portion (i.e., a configuration in which the discharge hole is formed in the bottom wall of the connecting portion), but may also be a configuration in which the discharge passage is connected to the space within the connecting portion through a discharge hole formed in the front wall of the connecting portion (i.e., a configuration in which the discharge hole is formed in the front wall of the connecting portion). In this case, the discharge passage is formed on the lever portion side so as to overlap with the space within the connecting portion in the vertical direction. Specifically, a groove for forming the discharge passage is provided only on the lever portion side, and the depth of the groove is set so as to overlap with the space within the connecting portion in the vertical direction. In addition, a horizontal through-hole communicating with the groove and the space within the connecting portion may be drilled in the front wall.

[0049] Furthermore, with regard to the discharge passage in the discharge structure, in the embodiment, the discharge passage 48 is formed by the groove 41a1 formed in the lever portion 41 of the opening lever 4, the groove 42f1 formed in the connecting portion 42, and the passage forming member 41b that includes the plate-shaped closing portion 41b2 and is attached to the opening lever 4. However, in the present invention, the discharge passage is not limited to being formed in this manner.

[0050] For example, in the above embodiment, a groove is formed in the lower part of the opening lever, so that the lower part is formed in an inverted U-shape, but instead, the lower part of the opening lever may be formed in an inverted L-shape, without the portion including one side wall of the groove in the above embodiment.The lower part formed in the inverted L-shape may then be blocked by a plate-like passage-forming member formed in an L-shape as in the above embodiment, to form a discharge passage.

[0051] Furthermore, the discharge passage is not limited to being formed by blocking a groove or the like formed on the opening lever with a plate-shaped path-forming member. A groove may be formed in the path-forming member, and the path-forming member and the underside of the opening lever may form the discharge passage. In this case, unlike the above-described embodiment, the opening lever is formed so that its underside is flat. Furthermore, the path-forming member is made of a thick member, and a groove opening to its upper surface is formed. However, the groove is formed so that one side in the extension direction opens to the outside of the path-forming member and the other side is blocked. Then, the path-forming member is attached to the underside of the opening lever with the other side facing the connecting portion in the longitudinal direction of the opening lever, and the discharge passage is formed by the groove in the path-forming member and the underside of the opening lever.

[0052] In the present invention, it is not essential to use a passage forming member to form the discharge passage, and the discharge passage may be formed so as to pass through the opening lever. In that case, the discharge passage is formed in the opening lever as a through hole in the longitudinal direction that opens to the end face of the opening lever on the swing shaft side and to the space within the connecting portion.

[0053] In the above embodiment, the discharge passage is formed to open on the end surface 45 of the opening lever 4 (a surface intersecting the longitudinal direction), and the opening (discharge outlet) is provided on the end surface facing forward so as to be easily accessible from the winding side in the front-to-rear direction of the water jet loom. However, in the present invention, the discharge passage is not limited to being formed to open on a surface intersecting the longitudinal direction (the discharge outlet is provided on a surface intersecting the longitudinal direction), and may be formed so that the discharge outlet is provided on the underside of the opening lever, for example.

[0054] (2) Regarding the connecting portion, in the present invention, the connecting portion is configured to include a peripheral wall composed of a front wall, a rear wall, and a pair of side walls, as well as a bottom wall that closes the lower portion of the space within the peripheral wall. The connecting portion may be configured such that the peripheral wall and the bottom wall are integrally molded, or the bottom wall may be formed as a separate member from the peripheral wall and attached to the peripheral wall. In the latter case, if the bottom wall is detachable from the peripheral wall, an operator can remove the bottom wall from the peripheral wall and then remove old lubricant adhering to the bottom wall.

[0055] (3) Regarding the blocking member, in the above embodiment, the blocking member 48 is made of a rubber material, and its elasticity allows the blocking state of the passage 48 to be maintained while allowing for easy removal. However, in the present invention, the blocking member is not limited to a member that maintains a blocking state by such elasticity. For example, the blocking member may be a screw member (such as a setscrew) that is threaded into a female threaded hole that serves as the opening of the discharge passage. Furthermore, the blocking member may be any other lid member that can seal the discharge passage.

[0056] (4) Regarding the supply unit, in the above embodiment, the supply unit 15 for supplying lubricant to the bearing unit 11 is composed of a communication hole 15a drilled in the push-up rod 5 and a grease nipple 15b attached to the end of the communication hole 15a, and the supply unit is provided on the push-up rod side. However, in the crank-type shedding device for a water jet loom that is the premise of the present invention, the supply unit is not limited to being provided on the push-up rod side, and may be provided on the connecting pin (connecting unit) side.

[0057] Specifically, the connecting pin has a connecting hole extending axially therein, and the communication hole is formed so as to open on one end face in the axial direction. Furthermore, the connecting pin has a through hole that communicates with the communication hole and opens on the outer peripheral surface, and a grease nipple is attached to the opening side of the through hole. Then, by supplying lubricant to the communication hole via the grease nipple, the lubricant can be supplied to the outer peripheral surface side of the connecting pin (inside the bearing portion) via the through hole.

[0058] Furthermore, the present invention is not limited to any of the embodiments described above, and can be modified as appropriate without departing from the spirit of the invention. [Explanation of symbols]

[0059] 1 Crank-type opening device 2 Loom Frames 2a Side frame 2b Side Frame 2c Front bottom stay 2d Rear bottom stay 2e Water pan 3 Oscillating shaft 4 Opening lever 4d through hole 5 Push-up rod 6 Crank mechanism 6a Eccentric drive unit 6b connecting rod 6c Oscillating lever 9 heddle frame 11 Bearing section 12 Plain bearings 12a Communication hole 15 Supply section 15a Communication hole 15b grease nipple 40 space 41 Lever section 41a Main body 41a1 Groove 41a2 Bottom side 41a3 Slope 41b Passage forming member 41b1 Occlusion 41b2 Mounting part 41b3 Bent part 42 Connecting part 42a front wall 42b Back wall 42c side wall 42d bottom wall 42g through hole 42f thick part 42f1 Groove 43 Bellows cover 44 connecting pin 45 End face 47 Closure element 48 Passage

Claims

1. A crank-type shedding device that is provided on a water-jet loom and in which a shedding lever attached to a swing shaft and a heald frame are connected by a push-up rod, the shedding lever comprising a lever portion attached to the swing shaft and a connecting portion having a pair of side walls that support a connecting pin that is inserted into a bearing portion of the push-up rod and front and rear end walls that face each other in the longitudinal direction of the lever portion, and a supply portion for supplying lubricant to the bearing portion, the connecting portion has a bottom wall that closes a space defined by the side wall and the end wall; The opening lever has a discharge passage used to discharge the lubricant, the discharge passage opening toward the pivot shaft of the lever portion in the longitudinal direction and communicating with a discharge hole opening into the space, and a closing member that closes the opening of the discharge passage and is provided so as to be able to open the closed state. A crank type shedding device for a water jet loom.

2. The discharge hole is formed in the bottom wall.

2. A crank-type shedding device for a water jet loom according to claim 1.

3. The discharge passage is formed so as to open onto a surface of the opening lever that intersects with the longitudinal direction.

3. A crank-type shedding device for a water jet loom according to claim 1 or 2.

4. The lever portion is composed of a main body portion attached to the swing shaft and connected to the connecting portion, and a passage forming member attached to the main body portion to form the discharge passage.

2. A crank-type shedding device for a water jet loom according to claim 1.

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