KR101347642B1 - Lubricating device for rotary hook - Google Patents

Abstract

The present invention is to provide a lubricating device for a rotary hook, capable of conveniently feeding oil regardless of a position at which the rotation of an outer hook is stopped. In the lubricating device for a rotary hook, an inner hook (3) is rotatively received in an outer hook that is rotated. A center oil room (23) into which a lubricant is fed is formed in the center of the bottom surface of the outer hook (2). A pelt as an impregnating member for impregnating the lubricant is placed within the oil room (23). A manual oil feeding hole (26) is formed at a side of the inner hook (3) of the center oil room (23). An oil outlet passage is formed to communicate the center oil room (23) with a track groove (9) of the outer hook (2). A manual oil feeding opening (51) is formed in the center side of the bottom surface (36) of the inner hook (3) while the manual oil feeding opening (51) corresponds to the manual oil feeding hole (26). Thereby, when a bobbin case is separated from the inner hook (3) at the position at which the rotation of the outer hook (2) is stopped, the manual oil feeding opening (51) formed in the center side of the bottom surface (36) of the inner hook (3) is exposed, so that oil can be fed into the manual oil feeding hole (26) of the outer hook (2) from the manual oil feeding opening (51).

Description

Lubrication device of rotary hook {LUBRICATING DEVICE FOR ROTARY HOOK}

The present invention relates to a lubrication device for a rotary hook (ROTARY HOOK) in a sewing machine.

Conventionally, in a sewing machine in which the outer hook rotates at a high speed, a lubrication device is provided for lubricating the sliding contact portion of the outer groove of the outer hook and the inner hook of the outer hook which are engaged with each other and is in sliding contact. What is done is widely employed. That is, the oil chamber which formed the oil path in the rotating shaft which transmits a rotational force to an outer hook, formed the horizontal hole and the vertical hole which communicated with this oil path in the outer hook, and stored the felt in the front end of the vertical hole. ) And an oil outlet communicating with the oil groove of the oil chamber and the outer hook (for example, the prior art of Patent Document 1).

However, in order to automatically lubricate lubricating oil as described above, a dedicated automatic lubrication device is required, and in particular, there is a problem that the cost increases when a large number of rotary hooks are used.

For this reason, the oil outlet which forms the hollow oil chamber which lube oil is lubricated in the outer peripheral wall part of an outer hook, and impregnates the impregnating member which impregnates lubricating oil in this oil chamber, and communicates the oil groove of the said oil chamber and the outer hook, The same hook filed the lubrication device (for example, patent document 1) of the rotary hook which formed the said outer hook with the manual oil supply hole which one end communicates with the said oil chamber, and the other end opens in the front side of the said outer peripheral wall part. Is proposing.

In the lubrication device of the rotary hook of the patent document 1, the lubricant oil supplied from the manual oil supply hole is impregnated into the impregnation member in the oil chamber, and the lubricant oil is gradually supplied into the gauge groove from the oil outlet gradually, and thus the inner groove is fitted with the gauge groove. Lubrication of the rails of the hook can be performed for a long time, and since the manual oil supply hole is opened on the front side of the outer circumferential wall portion of the outer hook, a part arranged to supply oil from the manual oil supply hole into the oil chamber around the outer hook. We can perform without this obstacle.

By the way, in the lubrication device of the rotary hook, since the inner hook is stored in the outer hook, the manual oil supply hole may be closed by the tip edge portion of the inner hook depending on the rotation stop position. In this case, the manual hook oil is turned by turning the outer hook. It is necessary to expose the hole.

In addition, although there are oil supply mechanisms (for example, Patent Documents 2 and 3) for the vertical drum for sewing machines in which oil filling holes are formed at the bottom of the outer hook, the oil filling holes are closed by the bottom of the inner hook depending on the rotation stop position. In the case of being closed, there is a problem in that it takes time to oil the oil supply hole by turning the outer hook to align the oil supply hole with the bottom opening of the inner hook.

Utility Model Registration No. 3000295 Utility Model Registration No. 3174644 Utility Model Registration No. 3174650

Accordingly, an object of the present invention is to provide a lubrication device for a rotary hook that can be easily lubricated regardless of the rotation stop position of the outer hook in view of the above problems.

In order to achieve the above object, the invention according to claim 1 is a lubrication apparatus of a rotary hook in which an inner hook is rotatably housed in an outer hook that is rotationally driven, wherein an oil chamber for lubricating oil is formed in the center of the bottom of the outer hook. And an impregnation member for impregnating lubricating oil in the oil chamber, an outer hook oil supply hole is formed on the inner hook side of the oil chamber, and an oil outlet for communicating the aperture groove of the oil chamber and the outer hook is formed. The inner hook oil supply hole was formed in the center of the bottom part of the bottom part of an inner hook corresponding to the said outer hook oil supply hole.

The invention according to claim 2 is characterized in that the inner hook oil supply hole is formed to be inclined with respect to the shaft center of the inner hook.

The invention according to claim 3 is characterized in that a shaft portion is provided in the center of the bottom portion of the inner hook, and the inner hook oil supply hole penetrates a part of the base side of the shaft portion.

The invention according to claim 4 is characterized in that the shaft portion is provided in the center of the bottom portion of the inner hook, and the inner hook oil supply hole penetrates a part of the base side of the shaft portion.

In addition, the invention according to claim 5 is characterized in that the inner hook lubrication hole penetrates the bottom surface portion, including the center of the bottom surface portion of the inner hook.

The invention according to claim 6 is characterized in that the angle between the inner hook lubrication hole and the shaft center of the inner hook is 20 degrees to 45 degrees.

The invention according to claim 7 is characterized in that the outer hook oil supply hole is positioned on an extension line of the center line of the inner hook oil supply hole.

In addition, the invention according to claim 8 is characterized in that the inner hook lubrication hole is located below the shaft portion in a use state in which the inner hook is stopped rotating.

In addition, the invention according to claim 9 is provided with an accommodating recess for enclosing the inner hook and accommodating the inner hook on the tip side of the outer hook, wherein the bin groove is formed on the inner circumferential surface of the outer circumferential wall portion, and fits with the bin groove. The track is formed in the outer circumferential portion of the inner hook, and a wall cutout portion formed by cutting the front end side of the outer circumferential wall portion is formed on the side where the inner hook lubrication hole is formed in the outer circumferential wall portion.

(Effects of the Invention)

According to the configuration of claim 1 of the present invention, when the bobbin case is removed from the inner hook at the position where the outer hook stops rotating, the inner hook lubrication hole is exposed on the center side of the inner bottom face portion, and from there, it is manually inserted into the outer hook lubrication hole. You can refuel.

Moreover, according to the structure of Claim 2 of this invention, since the inner hook oil supply hole is formed inclined, the oil supply nozzle is made into the substantially horizontal direction, and the front end of the oil supply nozzle of the state which made this horizontal direction through the inner hook oil supply hole is an outer hook. Can be inserted into the lubrication hole.

Moreover, according to the structure of Claim 3 of this invention, an inner hook lubrication hole can be arrange | positioned in the center of a bottom face part without interrupting a shaft part.

Moreover, according to the structure of Claim 4 of this invention, an outer hook lubrication hole can be arrange | positioned in the center of a bottom face part without interrupting a shaft part.

Moreover, according to the structure of Claim 5 of this invention, it becomes easy to insert a oil supply nozzle into an outer hook oil supply hole.

In addition, according to the structure of Claim 6 of this invention, when the angle is less than 20 degree, since the penetration part of the base end side of a shaft part becomes large, and the strength of a shaft part falls, 20 degree or more is preferable, and when it exceeds 45 degree, the outer peripheral wall part of an outer hook 45 degrees or less are preferable because these interfere with the back.

Moreover, according to the structure of Claim 7 of this invention, manual oil supply can be performed smoothly.

Moreover, according to the structure of Claim 8 of this invention, a lubricating oil can be supplied manually easily.

Moreover, according to the structure of Claim 9 of this invention, an outer peripheral wall part does not interfere in the insertion of oil supply nozzle.

1 is a longitudinal cross-sectional view of a rotary hook according to a first embodiment of the present invention.
It is sectional drawing of the principal part of the outer hook which shows Example 1 of this invention.
3 is a side view of a rotary hook showing Example 1 of the present invention.
Fig. 4 is a perspective view of the shaft portion showing the first embodiment of the present invention.
5 is a plan view of a rotary hook according to a first embodiment of the present invention.
Fig. 6 is a perspective view of the inner hook of Embodiment 1 of the present invention.
It is a perspective view of the bobbin case and bobbin which show Example 1 of this invention.
8 is a longitudinal cross-sectional view of a rotary hook according to a second embodiment of the present invention.

Preferred embodiment in this invention is described in detail, referring an accompanying drawing. In addition, embodiment described below does not limit the content of this invention described in a claim. In addition, all of the structures described below are not limited to the essential requirements of the present invention. In each embodiment, the lubrication apparatus of the rotary hook which is not conventional is obtained by employ | adopting the lubrication apparatus of the novel rotary hook different from the conventional one, and the lubrication apparatus of the rotary hook is described.

EMBODIMENT OF THE INVENTION Hereinafter, Example 1 of the lubrication apparatus of the rotary hook of this invention is demonstrated with reference to drawings.

Example 1

As shown in FIGS. 1-7, the rotary hook 1 of a present Example is a horizontal rotary hook, Comprising: The inner hook 3 is rotatably accommodated in the outer hook 2 which is rotationally driven, and the said outer hook 2 A silver pot is formed, and a shaft fixing portion 5 is provided with a coupling fixing portion 4 at the proximal end of the outer hook 2, and a rotating driving shaft (not shown) is fixedly fitted to the coupling fixing portion 4. Is formed. Moreover, on the front end side of the said outer hook 2, the accommodating recessed part 7 which encloses the outer peripheral wall part 6 and accommodates the said inner hook 3 is formed, In the inner peripheral surface of the said outer peripheral wall part 6 The groove | channel 9 which engages with the gauge 8 formed in the outer peripheral part of the said inner hook 3 is formed. Moreover, in the outer hook 2, the bottom part 10 is formed in the front end side of the said connection fixing part 4, The base end side of the said outer peripheral wall part 6 is fixed to this bottom face part 10, The bottom portion 10 is provided with an opening 10A that opens in the direction of the center axis of the outer hook 2.

As shown in FIG. 2, in the said outer peripheral wall part 6, the hollow oil chamber 11 in which lubrication oil is supplied is formed, and this oil chamber 11 is a hole in the outer peripheral wall part 6 from the outer peripheral surface side. It is formed by closing the outer circumferential surface side of the outer circumferential wall portion 6 with the oil cap 12 after finishing the hole processing. In the oil chamber 11, a felt 13, which is an impregnation member for impregnating lubricated oil, is housed.

The outer wall portion 6 is provided with an oil outlet 14 for communicating the oil chamber 11 and the bin groove 9. In addition, the outer circumferential wall portion 6 and the bottom surface portion 10 are formed with an oil path 15 formed of a horizontal hole portion 15Y and a vertical hole portion 15T communicating with each other, and the horizontal hole portion 15Y. The front end of is in communication with the oil chamber 11, and the base end of the vertical hole 15T is in communication with the front end side of the shaft hole 5.

The shaft hole 5 is located at the center of rotation of the outer hook 2 and has a larger diameter than the first step portion 21 and the first step portion 21 on the tip side of the shaft hole 5. The part 22 is formed, and the 1st step part 21 is longer than the 2nd step part 22, and comprises the center oil chamber 23 by the part enclosed by the 1st step part 21, and In the central oil chamber 23, a felt 24, which is an impregnation member for impregnating the lubricated oil, is housed. The base end of the vertical hole 15T is in communication with the side of the central oil chamber 23. In addition, the oil stopper 25 is fitted and fixed to the second stepped part 22, and the oil stopper 25 partially seals the front end side of the central oil chamber 23, and the oil stopper 25 is fitted. The manual oil supply hole 26 which is an outer hook oil supply hole is formed in the center of this, and this manual oil supply hole 26 is located in the rotation center of the outer hook 2, and is smaller than the said shaft hole 5. As shown in FIG. In addition, in the mounting state, the oil stopper 25 is flush with the bottom portion 10.

In addition, the oil outlet 14 is opened in the bin groove 9 at a position close to the pointed end portion 16 formed on a part of the outer circumferential wall portion 6.

In addition, the oil path 15, the oil chamber 11, and the oil outlet 14 constitute an oil outflow path 18 for communicating the center oil chamber 23 and the recess groove 9 of the outer hook 2. Doing.

As shown in FIG. 6 and the like, the inner hook 3 has a pot shape, and the rail 8 protrudes from the outer circumferential surface 32 of the outer circumferential wall portion 31 along the circumferential direction. The inner hook 3 is prevented from being pulled out by the inner hook press 17 screwed to the outer hook 2 in a state in which the rail 8 is fitted into the recess groove 9 of the outer hook 2. It is accommodated in the outer hook 2. As a result, the outer hook 2 and the inner hook 3 are rotatably coupled to each other.

In addition, the needle drop hole 33 is formed in the inner hook 3 on the movement trajectory of the pointed tip 16 formed in the outer hook 2. The needle drop hole 33 is a hole for entering a tip of a sewing needle (not shown) which moves up and down, and is formed to penetrate the outer circumferential wall portion 31 of the inner hook 3 from its outer circumferential surface 32 to the inner circumferential surface.

In addition, the inner hook 3 is located in the vicinity of the needle dropping hole 33, and the rotation prevention groove 34 is formed in the front end surface. This anti-rotation groove 34 is fitted with an inner hook stopper (not shown) provided on the sewing machine side to prevent rotation of the inner hook 3.

In order to sew the fabric of the sewing object using the horizontal rotary hook 1, the inner hook stopper of the sewing machine is fitted to the anti-rotation groove 34 to prevent the rotation of the inner hook 3, and thus the outer hook 2 Drive rotation. Thereby, the loop of the upper thread which arises by the up-and-down movement of a sewing needle is picked up by the pointed end part 16 provided in the outer hook 2, and from the bobbin 39 which the captured upper thread and the horizontal rotary hook 1 accommodate | acquire. The drawn lower thread 39A is entangled with each other to sew the woven fabric.

The inner hook 3 has a plate-shaped bottom portion 36 formed in a bridge shape at the proximal side, and openings 36A and 36A are formed at both sides of the bottom portion 36, and the bottom portion 36 Both sides are connected to the proximal end of the outer circumferential wall 31. Moreover, the substantially cylindrical stud 37 which is a bobbin shaft part stands up in the center of the bottom face part 36, and this stud 37 has the center axis of the inner hook 3 as an axial center. The stud 37 is for detachably attaching the bobbin case 40 to accommodate the bobbin 39, and the stud 37 is provided at the distal end of the stud groove in order to detach the bobbin case 40. 37A) is formed in the periphery. Further, a pair of anti-rotation projections 38 and 38 are formed at the tip side of the outer circumferential wall portion 31 of the inner hook 3 in the vicinity of the needle drop hole 33.

The said bobbin case 40 has the cylindrical cylinder 41 which can be fitted to the mounting hole 39B formed in the center part of the bobbin 39 which hold | maintains 39A of lower threads wound in the center. This cylinder 41 is formed in the shape which can fit the stud 37 of the inner hook 3, The stud of the inner hook 3 at the time of attachment of the bobbin case 40 to the inner hook 3 is carried out. (37) is fitted to the cylinder (41).

The bobbin case 40 is provided with a fixing structure (not shown in its entire structure) to the inner hook 3. This fixing structure has the operation knob 42 standing up on the top surface of the bobbin case 40, and protrudes to the fixing claw 43 and the outer circumferential surface provided in the center part by standing up the operation knob 42, The bobbin stopper 44 provided is made to slide. The operation knob 42 is biased by a coil spring (not shown), and is usually kept in a non-standing state. The fixed claw 43 is engaged with the stud groove 37A formed in the stud 37 of the inner hook 3 while the bobbin case 40 is mounted on the inner hook 3 to move the bobbin case 40 to the inner side. It is fixed to the hook (3). This fixing claw 43 is slidably moved in the direction of releasing engagement with the stud groove 37A by standing the operation knob 42 to allow attachment of the bobbin case 40 to the inner hook 3. Moreover, the bobbin stopper 44 enters by standing up the operation knob 42, and protrudes in the normal state in which the operation knob 42 is in a non-standing state.

The bobbin case 40 is provided with a guide groove 45 along its axial direction from its side wall to its top surface. The groove 45 is for positioning the bobbin case 40 in the circumferential direction when the bobbin case 40 is attached to the inner hook 3. The rotation intervals of the anti-rotation protrusions 38 and 38 are widths that can be fitted to the grooves 45 of the bobbin case 40, whereby the pair of anti-rotation protrusions 38 and 38 allow the bobbin case ( When the 40 is attached to the inner hook 3, the bobbin case 40 is positioned in the circumferential direction thereof.

In the bottom part 36 of the said inner hook 3, the manual oil supply hole 51 which is an internal hook oil supply hole is formed, and the manual oil supply hole 51 penetrates the base end side of the stud 37, and the bottom part It penetrates the bottom part 36 including the center of 36. As shown in FIG. The manual lubrication hole 51 is formed to be inclined at an angle θ with respect to an axis center which is the rotation center of the inner hook 3, and the angle θ is 20 degrees to 45 degrees, and in this example, manual oil supply is 30 degrees. The extension line of the center line 51C of the hole 51 is located in the center of the manual oil supply hole 26. In addition, the manual oil supply hole 51 is cylindrical. In addition, the bottom face portion 36 has a band shape having a substantially constant width, and the manual oil supply hole 51 is formed substantially along the longitudinal direction of the bottom face portion 36, and is located opposite the rotation preventing groove 34.

In addition, in this example, the manual oil supply hole 51 is located below the stud 37 in the state which fitted the anti-rotation groove 34 with the inner hook stopper provided in the sewing machine side, and prevented the inner hook 3 from rotating.

On the opposite side of the anti-rotation groove 34, a wall cutout portion 52 is formed which cuts off the tip side of the outer circumferential wall portion 31, and the wall cutout portion 52 is formed in the rotation center length direction of the inner hook 3. It is formed between the longitudinal edge portions 53 and 54 of the outer circumferential wall portion 31, and the lower outer circumferential wall portion 31A is formed at the outer circumferential wall portion 31 in these vertical edge portions 53 and 54. One vertical edge portion 53 is located at one side edge in the width direction of the bottom portion 36, and the other vertical edge portion 54 is at the opening portion 36A side in the width direction one side of the bottom portion 36. The position of the longitudinal edges 53, 54 is at an angle of approximately 90 degrees with respect to the center of the stud 37.

In such a configuration, the lubrication oil of the lubricating oil into the center oil chamber 23 is separated into the bobbin case 40 from the inner hook 3, and the manual lubrication hole 51 located at the bottom center of the inner hook 3. The oil supply nozzle (not shown) is inserted, the tip of the oil supply nozzle is performed by manual supply against the manual oil supply hole 26, and the lubricant oil supplied from the manual oil supply hole 26 is impregnated in the felt 24 with the central oil flow. It is stored in the chamber 23. Therefore, the operation | movement which exposes the manual oil supply hole 51 by turning the outer hook 2 is not required, and oil supply of the lubricating oil into the center oil chamber 23 can be performed easily in a short time, without taking time.

In this case, although the rotation stop position of the outer hook 2 is random, when the bobbin case 40 is removed, since the manual oil supply hole 26 is exposed, oil supply can be performed smoothly. That is, since the bobbin 39 is replaced when the lower thread 39A falls, oil supply may be performed at that time. Moreover, since the manual oil supply hole 51 is inclined so that it may become low from the base end side to the front end side, the oil supply nozzle inserted from the front end is obliquely raised, and oil does not flow out from a nozzle before oil supply. In addition, since the manual oil supply hole 51 is located in the lower side of the stud 37, and the wall cut-out part 52 is formed in the lower side of the inner hook 3 in a use state, the outer peripheral wall part 31 is lubricated. It does not interfere with the insertion of the nozzle.

When the manual oil supply hole 51 has an angle θ of less than 20 degrees with respect to the center of rotation of the inner hook 3, the penetrating portion on the proximal end side of the stud 37 becomes large, so that the strength of the stud 37 decreases. 20 degrees or more are preferable, and when it exceeds 45 degrees, since the outer peripheral wall part 6 etc. of the outer hook 2 will interfere, 45 degrees or less are preferable.

By lubricating the felt 24 of the central oil chamber 23, a large amount of lubricant oil can be stored, and the lubricant oil is impregnated into the felt 13 of the oil chamber 11 through the oil path 15. The lubricating oil impregnated in the felt 13 is at the oil outlet 14 side when the outer hook 2 stops rotating in the state in which the oil outlet 14 is turned downward, or when the outer hook 2 is driven to rotate. When the pressure slightly decreases, a small amount is gradually supplied from the oil outlet 14 into the groove 9, and the sliding contact portions of the groove 9 and the gauge 8 are lubricated by this lubricant. Accordingly, wear of the grooves 9 and 8 is reduced, and an oil film of lubricating oil is formed in the sliding contact portions between the grooves 9 and 8 so that the rotational torque of the outer hook 2 is stabilized, and the seam spacing is stabilized. Sewing work with high precision that does not cause unevenness can be performed. In addition, since the supply of the lubricating oil from the oil chamber 11 is gradually performed in small amounts, the interval for lubricating the oil into the central oil chamber 23 is long, so that the time required for the oiling operation into the central oil chamber 23 is reduced. . In addition, since the manual oil supply hole 26 is the center of rotation of the outer hook 2 and is located on the front face of the felt 24, even if centrifugal force occurs due to the rotation of the outer hook 2, the center oil chamber ( Lubricant in 23 is less likely to leak from the manual oil supply hole 26 to the front side.

Thus, in the present embodiment, the bottom part of the outer hook 2 in the lubrication apparatus of the rotary hook 1 which accommodates the inner hook 3 rotatably in the outer hook 2 which is rotationally driven according to claim 1 The center oil chamber 23, which is an oil chamber in which lubricating oil is lubricated, is formed in the center of the center 10, and the felt 24, which is an impregnation member for impregnating lubricating oil, is stored in the central oil chamber 23. The oil outflow path 18 which forms the manual oil supply hole 26 which is an outer hook oil supply hole in the inner hook 3 side of 23, and communicates the center groove 23 and the recess groove 9 of the outer hook 2 is made. ) And the manual oil supply hole 51 which is an inner hook oil supply hole corresponding to the manual oil supply hole 26 is formed in the center side of the bottom part 36 of the inner hook 3, so that the outer hook 2 When the bobbin case 40 is removed from the inner hook 3 at the position where the rotation is stopped, the manual oil supply hole 51 is formed at the center side of the inner bottom face 36. It exposes and can supply oil manually from the manual oil supply hole 26 of the outer hook 2 from this.

Further, in the present embodiment, the manual oil supply hole 51 corresponding to claim 2 is formed to be inclined with respect to the axis of the inner hook 3, so that the manual oil supply hole 51 is inclined. For this reason, the oil supply nozzle is made into the substantially horizontal direction, and the tip of the oil supply nozzle in the state made into this horizontal direction can be inserted into the manual oil supply hole 26 of the outer hook 2 through the manual oil supply hole 51. FIG.

In addition, in this embodiment, according to claim 3, the studs 37, which are shaft parts, are provided in the center of the bottom portion 36 of the inner hook 3, and the manual oil supply hole 51, which is the inner hook oil supply hole, has a stud. Since it penetrates a part of the base side of 37, the stud 37 located in the center of the inner hook 3 is not obstructed, and the manual oil supply hole 51 can be arrange | positioned in the center of the bottom part 36. have.

In addition, since an oil chamber 11 is provided in the oil outflow path 18 as an effect in the embodiment, the lubricating oil stored in the central oil chamber 23 is once stored in the oil chamber 11 and gradually supplied to the bin groove 9. Can be. In addition, since the manual oil supply hole 51 is located under the stud 37 in the use state which rotated the inner hook 3, the lubricating oil can be easily supplied manually. Moreover, since the wall cut-out part 52 which cut | disconnected the front end side of the outer peripheral wall part 31 is formed in the lower side which is the side where the manual oil supply hole 51 was formed, the outer peripheral wall part 31 does not interfere in the insertion of a fuel supply nozzle. Do not. In addition, since the central oil chamber 23 has a larger diameter than the shaft hole 5, the capacity can be large, and the impregnating member can store a large amount of lubricating oil as compared with the prior art. Moreover, since the base end side of the center oil chamber 23 is open | released, it can be used also for the automatic oil supply apparatus which supplies oil from the base end side of the axial hole 5.

Example 2

Fig. 8 shows Embodiment 2 of the present invention, the same parts as in Embodiment 1 are denoted by the same reference numerals, and detailed description thereof will be omitted. The manual lubrication hole 61 of this example is formed in substantially parallel to the shaft center of the stud 37 by performing a circular hole processing from the base end side of the bottom face part 36. In addition, the manual oil supply hole 61 penetrates a part of the base end side of the stud 37, and a part of the bottom face part 36, and the shaft center of the stud 37 and the approximate center of the stud 37 are formed at the front end of the manual oil supply hole 61. 61 A of orthogonal front end surfaces are formed.

Thus, in this embodiment, the stud 37 which is an axial part is provided in the center of the bottom part 36 of the inner hook 3, and the manual oil supply hole 61 which is an inner hook oil supply hole is a part of the base side of the stud 37. As shown in FIG. Since it penetrates, the effect and effect similar to Example 1 are acquired.

In addition, in this example, since the manual oil supply hole 61 is formed along the center axis direction of the inner hook 3, the process can be performed easily. In addition, in this example, like the manual oil supply hole 51 of Example 1, since the manual oil supply hole 61 penetrates the part which passes through the center of the stud 37 in the bottom part 36, it supplies the oil supply nozzle manually. It becomes easy to insert into the oil supply hole 26.

In addition, this invention is not limited to a present Example, A various deformation | transformation is possible within the range of the summary of this invention. For example, the method of fixing the oil stopper to the second stepped portion can be appropriately selected. In addition, in Example 1, although the center of the outer hook oil supply hole was located on the extension line of the center line of an inner hook oil supply hole, the outer hook oil supply hole should just be located partially on the extension line of an inner hook oil supply hole. Lubrication by supply can be performed smoothly. Moreover, in the rotary hook of Example 1 and Example 2, the inner hook oil supply hole is formed in the position which can visually recognize at least one part of the outer hook oil supply hole from the inner hook oil supply hole. In addition, in the Example, although the inner hook oil supply hole was circular, the shape of an inner hook oil supply hole may be oval or polygonal.

1: rotary hook 2: outer hook
3: inner hook 11: oil chamber
18: oil spill path 23: central oil chamber
26: Manual oil supply hole (outer hook oil supply hole) 36: Bottom part
36A: Opening 37: Stud (shaft part)
51: manual oil supply hole (inside hook oil supply hole) 51C: center line
61: manual oil supply hole (inside hook oil supply hole)

Claims (9)

A lubricating device for a rotary hook in which an inner hook is rotatably stored in an outer hook driven to rotate: an oil chamber for lubricating oil is formed in the center of the bottom portion of the outer hook, and the impregnation for impregnating the lubricating oil in the oil chamber. A member is accommodated, an outer hook lubrication hole is formed in the inner hook side of the oil chamber, an oil outlet is formed for communicating the oil groove of the oil chamber and the outer hook, and the outer hook lubrication is formed at the center side of the bottom portion of the inner hook. The inner hook lubrication hole was formed corresponding to the hole, The lubrication apparatus of the rotary hook characterized by the above-mentioned. The method of claim 1,
The inner hook lubricating hole is formed to be inclined with respect to the shaft center of the inner hook. The method of claim 1,
The shaft part is provided in the center of the bottom part of the said inner hook, The said inner hook lubrication hole penetrates a part of the base side of the said shaft part, The lubrication apparatus of the rotary hook characterized by the above-mentioned. 3. The method of claim 2,
The shaft part is provided in the center of the bottom part of the said inner hook, The said inner hook lubrication hole penetrates a part of the base side of the said shaft part, The lubrication apparatus of the rotary hook characterized by the above-mentioned. The method according to any one of claims 1 to 4,
The inner hook lubrication hole includes a center of the bottom portion of the inner hook and penetrates the bottom portion. The method according to claim 2 or 4,
The angle of the said inner hook oil supply hole and the said inner hook shaft center is 20 degrees-45 degrees, The lubrication apparatus of the rotary hook characterized by the above-mentioned. The method according to claim 2 or 4,
The outer hook oil supply hole is located on the extension line of the center line of the said inner hook oil supply hole, The lubrication apparatus of the rotary hook characterized by the above-mentioned. The method according to claim 3 or 4,
The inner hook lubrication hole is located below the shaft portion in a use state in which the inner hook is stopped rotating. The method according to any one of claims 1 to 4,
A storage recess for enclosing the inner hook and accommodating the inner hook is formed on the tip side of the outer hook, and the bin groove is formed on the inner circumferential surface of the outer circumferential wall portion, and the rail to which the bin hook is fitted is an outer circumferential part of the inner hook. And a wall cutout portion formed by cutting the tip end side of the outer circumferential wall portion formed on the side of the outer circumferential wall portion formed with the inner hook lubrication hole.

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