JP7731319B2 - Crank-type shedding device for water-jet looms - Google Patents

Description

This invention relates to a crank-type shedding device for a water-jet loom, in which a shedding lever attached to a swinging shaft is connected to a heald frame by a push-up rod. The shedding lever is 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 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. The crank-type shedding device for a water-jet loom is equipped with a supply portion for supplying lubricant to the bearing portion.

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

The crank-type shedding device disclosed in Patent Document 1 comprises a swing shaft connected to a crank mechanism powered by the loom's main shaft, a shedding lever attached to the swing shaft, and a push-up rod connected to the shedding lever and heald frame. In this crank-type shedding device, the swing shaft is driven back and forth by the crank mechanism, causing the heald frame, which is connected to the swing shaft via the shedding lever and push-up rod, to reciprocate up and down.

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 the swing shaft and a connecting portion to which the boost rod is connected. The connecting portion is formed to have a pair of side walls, and the space between the both walls is open above and below. The connecting portion is also provided with a connecting pin that spans between the both walls. The opening lever then connects the connecting portion to the boost rod by inserting the connecting pin into the bearing portion of the boost rod between the both walls. 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.

Publication No. 7-26374 Japanese Utility Model Application Laid-Open Publication No. 5-66081

In a crank-type shedding device, the bearing of the push-up rod slides against the connecting pin as the swing shaft (shedding lever) swings, so the bearing is lubricated with a lubricant such as grease. Furthermore, 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 (for example, 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.

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

In addition, in a typical water jet loom, a water receiving section (water receiving pan) is provided below the shedding lever to receive the water sprayed from the weft insertion nozzle. Therefore, in conventional systems, the lubricant that falls as described above is received in the water receiving pan. As a result, in conventional systems, the water received in the water receiving pan ends up containing a large amount of lubricant (oil). For this reason, in typical weaving factories, 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.

In light of the crank-type shedding devices for conventional water-jet looms described above, the present invention aims to provide a crank-type shedding device with a configuration that makes it less likely for lubricant to fall onto the water receiving pan.

This invention is based on a crank-type shedding device for a water-jet loom, in which a shedding lever attached to a swinging shaft is connected to a heald frame by a push-up rod. In particular, the shedding lever is 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 inserted into a bearing portion of the push-up rod and end walls that face the longitudinal direction of the lever portion. The crank-type shedding device for a water-jet loom is equipped with a supply portion for supplying lubricant to the bearing portion.

The present invention is characterized in that the connecting portion has a bottom wall that closes the space defined by the side walls and end walls, and the opening lever has a discharge passage used to discharge the lubricant, which opens on the pivot 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.

In such a 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 that intersects with the longitudinal direction of the opening lever. The lever portion may also be composed of a main body portion attached to the pivot shaft and having a continuous connecting portion, and a passage-forming member attached to the main body portion to form the discharge passage.

In 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 is configured to have a bottom wall that closes the space in which the bearing is located. As a result, in this crank-type opening device, old lubricant that falls from the bearing as 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 pivot shaft side of the lever in the longitudinal direction and the space. As a result, 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 onto the water receiving pan as it is supplied to the bearing.

The crank-type shedding device also has a closing member that can close the opening of the discharge passage and release the closed state. This allows the opening of the discharge passage to be closed with the closing member during weaving, preventing 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.

As such, this invention not only reduces the risk of lubricant dripping onto the water receiving pan when lubricant is supplied to the bearing, but also prevents lubricant from scattering from the opening lever, which swings during weaving. Compared to conventional devices, this invention therefore minimizes the risk of oil getting mixed into the water collected in the water receiving pan, thereby reducing the effort and cost required for wastewater treatment at weaving factories.

1 is a perspective view showing a crank-type shedding device in a water jet loom to which the present invention is applied. FIG. 2 is an enlarged top view of FIG. 1 . 3 is a cross-sectional view taken along line AA in FIG. 2. FIG. 4 is a view taken along the arrow B in FIG. 3 .

The following describes one embodiment (this example) of a crank-type shedding device for a water jet loom according to the present invention, with reference to Figures 1 to 4.

Figure 1 shows a crank-type shedding device 1 for a water-jet loom. The crank-type shedding device 1 is configured to move a heald frame 9 up and down using a crank mechanism 6 driven by the water-jet loom's main shaft (not shown). The crank-type shedding device 1 includes two oscillating shafts 3, 3 mounted between a pair of side frames 2a, 2b of the loom frame 2, and each oscillating 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 to each shaft. The oscillating 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.

The 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 driven to rotate 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, causing the heald frame 9 connected to each oscillating shaft 3 to swing back and forth in the vertical direction.

Each swing shaft 3 is connected to the heald frame 9 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, which is attached to the swing shaft 3, and a connecting portion 42, which is connected to the push-up rod 5.

The lever portion 41 has a through-hole 4d for inserting the pivot shaft 3. The through-hole 4d is formed at one end of the longitudinal direction of the opening lever 4, penetrating the lever portion 41 in a direction perpendicular to the longitudinal direction (hereinafter referred to as the "width direction"). The lever portion 41 also has a split clamping mechanism for fixing the opening lever 4 to the pivot shaft 3 when the pivot shaft 3 is inserted into the through-hole 4d.

The connecting portion 42 is provided at the other end of the lever portion 41 in the longitudinal direction, so as to be continuous with the lever portion 41 in the longitudinal direction. The 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 to form a rectangular space 40 inside in a plan view.

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, and is supported by both side walls 42c, 42c. In other words, the connecting pin 44 is provided in a manner that bridges 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, the connecting portion 42 is provided with three connecting pins 44.

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 axial end. The bearing 11 is cylindrical with a through-hole that runs perpendicular to the axial direction. The opening lever 4 and bearing 11 are connected by inserting a connecting pin 44 in a connecting portion 42 through the through-hole. The diameter of the through-hole is therefore 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 connecting pin 44 are connected via the plain bearing 12.

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 the communication hole 15a opposite the bearing portion 11 is bent in a direction perpendicular to the axial direction so as to open onto the outer circumferential surface of the push-up rod 5. The communication hole 15a has a female thread at the end that opens onto the outer circumferential surface, and a grease nipple 15b is attached by threading onto the female thread. The communication hole 15a and grease nipple 15b supply lubricant into the bearing portion 11 and correspond to the supply portion in this invention.

In addition, in the bearing portion 11, the sliding bearing 12 also has a communication hole 12a drilled therein so that it communicates with the communication hole 15a. As a result, when lubricant is supplied from the grease nipple 15b, the lubricant is supplied to the inner surface of the sliding bearing 12 via the communication hole 15a and the communication hole 12a of the sliding bearing 12.

In addition, a bellows cover 43 is provided on the opening lever 4 to prevent lubricant from splashing from the top of the connecting part 42 as the opening lever 4 swings during weaving. The bellows cover 43 is made of rubber and is attached to the connecting part 42 so as to cover the top of the rectangular space 40.

The water jet loom also includes a water receiving pan 2e (Figure 1) that receives water sprayed 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 rear bottom stay 2d, which are the 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 rear bottom stay 2d in the longitudinal direction of the loom.

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 that closes 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 that communicates with a discharge hole that opens into the space 40, and a closing member that closes 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 arranged 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 to form the discharge passage. The crank-type shedding device of this embodiment, equipped with such a shedding lever 4, is described in detail below.

In the opening lever 4, the connecting portion 42 is configured to have not only the pair of end walls (front wall 42a and rear wall 42b) and pair of side walls 42c, 42c that define the space 40, but also a bottom wall 42d that closes off the lower side of the space 40 (defining the lower side of the space 40). In other words, 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 off by the bottom wall 42d. As mentioned above, a 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.

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

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

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

The lever portion 41 is also provided with a passage-forming member 41b that closes the underside opening 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 plate material in the direction of the short sides, and the portion of the passage-forming member 41b closer to the bent portion 41b3 has a sufficiently larger area than the portion on the other end. One end of the passage-forming member 41b forms the closing portion 41b1 that closes the groove 41a1, as described above, and the other end forms the mounting portion 41b2 that is attached to the side of the main body portion 41a.

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. The dimension of the closure portion 41b1 in the passage-forming member 41b in the direction of the short side is approximately equal to the dimension of the main body portion 41a in the width direction.

The passage-forming member 41b is attached to the main body 41a by threading multiple fixing bolts into corresponding female threaded 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 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 so that the lower portions of the grooves 41a1 and 42f1 are blocked by the closing portion 41b1 of the passage-forming member 41b, forming a passage 48 inside. 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.

The opening lever 4 is provided with a blocking member 47 for blocking the opening of the passage 48. As mentioned above, the groove 41a1 in the lever portion 41 (main body portion 41a) has a slope 41a3 formed at the end of its bottom surface on the end face 45 side. 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 fit 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 blocked state of the passage 48 due to its elasticity, and can be easily removed.

With the crank-type opening device 1 configured as described above, the connecting portion 42 of the opening lever 4, which is surrounded by a front wall 42a, a rear wall 42b, and a pair of side walls 42c, 42c, is closed not only around the periphery but also underneath by the bottom wall 42d. As a result, with 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.

The opening lever 4 also has a passage 48 formed within it, 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 oscillating 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 oscillating shaft 3 side.

The opening of the passage 48 on the end face 45 side is blocked by a blocking member 47, and in this blocked state, old lubricant accumulates within the passage 48. Then, by removing the blocking member 47 and opening the opening as needed, the old lubricant in the passage 48 can be drained. For example, by preparing a container or the like to allow the operator to collect the old lubricant drained from the passage 48, the lubricant can be effectively prevented from falling into the water receiving pan 2e. Furthermore, by maintaining the opening blocked by the blocking member 47 during weaving, it is possible to prevent lubricant from splashing out of the opening of the passage 48 as the opening lever 4 swings.

In this way, in the crank-type opening device 1 of this embodiment, the passage 48, which 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 within the connecting portion 42, is used to discharge lubricant from the opening lever 4. Therefore, the passage 48 corresponds to the discharge passage in this invention, and the through-hole 42g corresponds to the discharge hole in this invention.

The opening lever 4 also has a through-hole 42g formed in the bottom wall 42d that opens into the space 40 within 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 easily passes through the through-hole 42g and falls into the passage 48, making it easier for the old lubricant to be discharged from the space 40 toward the passage 48.

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 as a plane perpendicular to the longitudinal direction. As a result, in the crank-type shedding device 1, the operator supplying 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, facilitating the work of removing the blocking member 47 from the opening of the passage 48 to unblock the passage 48.

Furthermore, the opening lever 4 is configured so that the lower portions of the grooves 41a1 and 42f1 are blocked by the blocking portion 41b1 of the passage-forming member 41b, forming a passage 48 therein. The lever portion 41 is made up of 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 an opening lever 4 with a passage 48 formed therein in the crank-type opening device 1.

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 also be implemented in the following modified examples.

(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 a 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.

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 with the same thickness as 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 side extends to the vicinity of the rear wall. Then, similar to groove 42f1 in the above embodiment, the lower portion of the groove can be blocked by a blocking portion. In this case, the discharge hole can 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 can be set to an appropriate position in relation to the discharge passage.

The discharge structure is not limited to one in which the discharge passage is connected to the space within the connecting portion via a discharge hole formed in the bottom wall of the connecting portion (i.e., one in which the discharge hole is formed in the bottom wall of the connecting portion), but may also be one in which the discharge passage is connected to the space within the connecting portion via a discharge hole formed in the front wall of the connecting portion (i.e., one 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 forming the discharge passage is provided only on the lever portion side, and the depth of this groove is set so that it overlaps with the space within the connecting portion in the vertical direction. Then, a horizontal through-hole communicating with the groove and the space within the connecting portion can be drilled in the front wall.

Furthermore, with regard to the discharge passage in the discharge structure, in the above embodiment, the discharge passage 48 is formed by a groove 41a1 formed in the lever portion 41 of the opening lever 4, a groove 42f1 formed in the connecting portion 42, and a passage-forming member 41b that includes a plate-shaped blocking 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.

For example, in the above embodiment, a groove is formed in the lower part of the opening lever, so that the lower part forms an inverted U-shape. However, instead, the lower part of the opening lever is formed so that it forms an inverted L-shape, without the portion that includes one side wall of the groove in the above embodiment. Furthermore, the lower part formed in this inverted L-shape may be blocked by a plate-shaped passage-forming member formed in an L-shape, as in the above embodiment, to form a discharge passage.

The discharge passage does not necessarily have to be formed by blocking a groove or the like formed on the opening lever with a plate-shaped passage-forming member. A groove may be formed in the passage-forming member, and the passage-forming member may be formed by the underside of the opening lever and the underside of the opening lever. In this case, unlike the above-mentioned embodiment, the opening lever is formed so that its underside is flat. Furthermore, the passage-forming member is made of a thick member, and a groove that opens to the upper surface is formed. However, the groove is formed so that one side in its extension direction opens to the outside of the passage-forming member and the other side is closed. The passage-forming member is then 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 passage-forming member and the underside of the opening lever.

In the present invention, it is not necessary to use a passage-forming member to form the discharge passage; 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 longitudinal through-hole that opens to the end face of the opening lever on the pivot shaft side and to the space within the connecting portion.

In addition, 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 that it is easily accessible from the winding side in the longitudinal 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.

(2) Regarding the connecting portion, in the present invention, the connecting portion is configured to include a peripheral wall consisting of a front wall, a rear wall, and a pair of side walls, as well as a bottom wall that closes off the lower part of the space within the peripheral wall. Furthermore, the connecting portion may be configured such that the peripheral wall and 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 any old lubricant adhering to the bottom wall.

(3) Regarding the blocking member, in the above embodiment, the blocking member 48 is made of a rubber material, and its elasticity allows the passage 48 to remain blocked while also allowing for easy removal. However, in the present invention, the blocking member is not limited to a member that maintains a blocked state through 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.

(4) Regarding the supply unit, in the above-described 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 this invention, the supply unit is not limited to being provided on the push-up rod side, and may also be provided on the connecting pin (connecting unit) side.

Specifically, the connecting pin has a connecting hole extending axially therein, with the through hole opening on one end face in the axial direction. Furthermore, the connecting pin has a through hole that communicates with the through hole and opens on the outer circumferential surface, and a grease nipple is attached to the opening side of the through hole. Lubricant can then be supplied to the connecting hole via the grease nipple, and the lubricant can be supplied to the outer circumferential surface of the connecting pin (inside the bearing portion) via the through hole.

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.

1 crank type shedding device 2 loom frame 2a side frame 2b side frame 2c front bottom stay 2d rear bottom stay 2e water receiving pan 3 swing shaft 4 shedding lever 4d through hole 5 push-up rod 6 crank mechanism 6a eccentric drive unit 6b connecting rod 6c swing lever 9 heald frame 11 bearing unit 12 plain bearing 12a communication hole 15 supply unit 15a communication hole 15b grease nipple 40 space 41 lever unit 41a main body unit 41a1 groove 41a2 lower surface 41a3 inclined surface 41b passage forming member 41b1 blocking unit 41b2 mounting unit 41b3 bending unit 42 connecting unit 42a front wall 42b rear wall 42c side wall 42d bottom wall 42g through hole 42f thick portion 42f1 groove 43 bellows cover 44 Connecting pin 45 End surface 47 Closure member 48 Passage

Claims (4)

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;
a crank-type shedding device for a water jet loom, wherein the shedding 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 configured to close the opening of the discharge passage and to be able to release the closed state. 2. A crank-type shedding device for a water jet loom according to claim 1, wherein the discharge holes are formed in the bottom wall. 3. A crank-type shedding device for a water jet loom according to claim 1, wherein the discharge passage is formed so as to open onto a plane of the shedding lever that intersects with the longitudinal direction. 2. A crank-type shedding device for a water jet loom according to claim 1, wherein the lever portion comprises a main body portion attached to the swing shaft and to which the connecting portion is continuous, and a passage forming member attached to the main body portion to form the discharge passage.