JP6446221B2 - sewing machine - Google Patents

Description

  The present invention relates to a sewing machine including an under cover.

The conventional sewing machine is equipped with a bottom cover having an oil tank at the lower part of the sewing machine bed part, and the lubricating oil falling from the sewing machine bed part is collected inside from a collection port provided on the upper surface of the oil tank.
Further, the sewing machine bed part is supported by the support part so as to be rotatable with respect to the sewing machine table T. For maintenance or the like, the sewing machine is rotated and tilted obliquely, and an operator accesses the bottom part of the sewing machine bed part. It was possible to do.
In the above-described sewing machine, since the bottom cover covers the sewing machine bed portion, a gap is formed between the side wall portion on the support portion side of the sewing bed portion and the side wall portion on the support portion side of the bottom cover. Therefore, as described above, when the sewing machine is rotated and tilted obliquely, the lubricating oil falling from the inside of the sewing machine frame flows through the upper surface of the oil tank and leaks to the outside from the gap. In the sewing machine of this type, the outflow prevention plate extended to the front side is provided at the lower end portion of the side wall portion on the support portion side of the sewing machine bed portion, and the lubricant falling from the sewing machine frame inside the corner portion of the side wall portion and the outflow prevention plate is provided. Oil was stored to prevent leakage of the lubricating oil (see, for example, Patent Document 1).

JP 2012-135527 A

  However, the sewing machine disclosed in Patent Document 1 has a structure in which lubricating oil is stored in the side walls and corners of the outflow prevention plate, so that the capacity is small, and the lubricating oil that gradually leaks when the sewing machine frame is inclined for a long time. Overflows from the corners of the side wall and the outflow prevention plate and leaks from the gap between the side wall of the sewing machine bed and the side wall of the bottom cover.

  In view of the above-mentioned problems, an object of the present invention is to more effectively prevent leakage of lubricating oil.

The invention described in claim 1
A sewing machine frame having a sewing machine bed portion including a ceiling portion and a bed side wall portion hanging downward from the periphery of the ceiling portion and having a bottom portion opened;
In a sewing machine comprising a support portion that supports the sewing machine frame so as to be rotatable about a horizontal support shaft with respect to a sewing machine table,
Comprising a bottom plate portion and a storage side wall portion raised from the entire periphery of the bottom plate portion, comprising a lubricating oil storage container having an open top portion;
While the bed side wall portion on the support portion side of the sewing machine bed portion and the storage side wall portion on the support portion side of the storage container are in contact with each other, sealing is performed so that no lubricating oil passes between them.
The bottom plate portion of the storage container is formed such that an end portion on the support portion side is deepest as compared with other portions.

Furthermore, the invention of claim 1 is a sewing machine,
The horizontal direction parallel to the longitudinal direction of the machine bed portion is the Y-axis direction, the horizontal direction perpendicular to the Y-axis direction is the X-axis direction, and the vertical vertical direction is perpendicular to the X-axis direction and the Y-axis direction. Z-axis direction
The storage side wall portion is formed along the YZ plane and provided on the front side of the bottom plate portion;
A second storage side wall portion formed along the YZ plane and provided on the support portion side of the bottom plate portion;
A third storage side wall portion formed along the XZ plane and provided in the vicinity of the needle bar side end portion of the bottom plate portion;
A fourth storage side wall portion formed along the X-Z plane and provided at an end portion of the bottom plate portion on the standing body portion side;
A fifth storage side wall formed along the X-Z plane and provided at the end of the bottom plate on the needle bar side;
A sixth storage side wall formed along the YZ plane and provided at the end of the bottom plate on the needle bar side;
With
The end of the third storage side wall portion on the support portion side is connected to the end portion of the sixth storage side wall portion on the standing trunk portion side,
The front side end of the third storage side wall is connected to the needle bar side end of the first storage side wall,
An end portion on the support portion side of the fourth storage side wall portion is connected to an end portion on the standing trunk portion side of the second storage side wall portion,
The end part on the front side of the fourth storage side wall part is connected to the end part on the standing trunk part side of the first storage side wall part,
The end of the fifth storage side wall on the support portion side is connected to the end of the second storage side wall on the needle bar side, and the front end of the fifth storage side wall is the sixth storage side wall. It is characterized by being connected to the end of the needle bar side.

Furthermore, the invention of claim 1 is a sewing machine,
The bed side wall
A first bed side wall formed along the YZ plane and provided on the front side of the ceiling;
A second bed side wall portion formed along the YZ plane and provided on the support portion side of the ceiling portion;
An end portion on the needle bar side of the first bed side wall is formed along the XZ plane and is provided near the needle bar side end portion of the ceiling portion and in front of the shuttle mechanism. A third bed side wall connected to
It is formed along the XZ plane and is provided at the end portion on the standing body portion side, the front side end portion is connected to the end portion on the standing body portion side of the first bed side wall portion, and the end portion on the support portion side Is a fourth bed side wall connected to the end of the second bed side wall on the side of the standing torso,
It is formed along the XZ plane, is located inside the second bed side wall, and the end on the support side is connected to a position near the end on the needle bar side of the second bed side wall. And a fifth bed side wall.

Furthermore, the invention of claim 1 is a sewing machine,
An inner wall portion hanging from the ceiling portion of the sewing bed portion;
The inner wall portion is formed along the YZ plane, is inside the second bed side wall portion and faces the second bed side wall portion, and an end on the needle bar side is a front surface of the fifth bed side wall portion. Connected to the end of the side ,
The inner wall portion is shaped so as to be closer to the second bed side wall portion as it goes toward the standing trunk portion side.

The invention according to claim 2 is the sewing machine according to claim 1,
The upper end surface of the first storage side wall portion and the lower end surface of the first bed side wall portion abut,
The upper end surface of the second storage side wall portion and the lower end surface of the second bed side wall portion abut,
The upper end surface of the fourth storage side wall portion and the lower end surface of the fourth bed side wall portion abut,
The upper end surface of the fifth storage side wall and the lower end surface of the fifth bed side wall abut,
The upper end surface of the sixth storage side wall and the lower end surface of the inner wall abut,
It is characterized by sealing so that lubricating oil may not pass between the upper end surface of the storage side wall part which contact | abuts, the bed side wall part, and the lower end surface of the said inner wall part.

The invention according to claim 3 is the sewing machine according to claim 1 or 2,
An oil separator is provided at an end portion of the storage container on the support portion side and covers a part of the opened upper part of the storage container.

The invention according to claim 4 is the sewing machine according to any one of claims 1 to 3 ,
Protruding straightening portions along the direction from the front end of the storage container toward the support end are provided on the bottom plate of the storage container.

The invention according to claim 5 is the sewing machine according to any one of claims 1 to 4 ,
An under cover that houses the storage container inside the sewing machine bed portion below,
The under cover includes a bottom plate portion and an under cover side wall portion raised from the entire periphery of the bottom plate portion, and the entire upper portion is open.
The lower surface of the bottom plate portion of the under cover is formed such that the end on the opposite side is lower than the end on the needle bar side in the longitudinal direction of the sewing bed portion,
Rotation of a knee-lifting lever that raises the cloth pressing member to a position near the end opposite to the needle bar side in the longitudinal direction of the sewing machine bed portion in the longitudinal direction of the sewing machine bed portion along the longitudinal direction of the sewing bed portion While forming a through hole to pass the support shaft,
A notch is formed at a position near the end opposite to the needle bar side in the longitudinal direction of the sewing machine bed, in the upper end of the under cover side wall.

The invention according to claim 6 is the sewing machine according to any one of claims 1 to 5 ,
A cloth presser member for pressing the sewing product from above on the needle plate;
An upper transmission body that is supported by the sewing machine bed portion so as to be movable up and down, transmits a press release operation to the cloth pressing member by an ascending operation, and has a lower end portion located inside the sewing bed portion;
A lower transmission body, which has an upper end abutting against a lower end portion of the upper transmission body and is passed through the through-hole of the storage container so that the lower end protrudes to the outside and is supported by the storage container so as to be movable up and down;
A manual operation lever for imparting an upward movement operation only to the upper transmission body;
A knee-raising lever that imparts an upward movement to the lower transmission body,
The lower transmission body has a closing portion that closes the through hole from above.

The invention according to claim 7 is the sewing machine according to claim 6 ,
A through hole through which the lower transmission body passes is formed at the center of a cylindrical portion erected upward from the bottom plate portion of the storage container,
The closed portion of the lower transmission body is composed of a first closed portion that closes the periphery of the through hole in the upper end surface of the cylindrical body and a second closed portion that is in close contact with the upper outer peripheral surface of the cylindrical body. It is characterized by.

The invention according to claim 8 is the sewing machine according to any one of claims 1 to 7 ,
Comprising a transparent bar-like oil amount display member that penetrates the ceiling of the sewing machine bed and whose lower end reaches the inside of the storage container;
The oil amount display member has an inclined surface at a lower end thereof, and the inclined surface performs internal reflection according to the liquid level height of the lubricating oil, and the heights formed at the opposite portions are different. While reflecting the gauge of the book to the end face of the upper end,
The amount of the lubricating oil is displayed in stages according to the number of reflected images of the gauge reflected on the end face of the upper end.

  In the present invention, the lubricating oil is stored inside the storage container including the bottom plate and the side wall portion raised from the entire periphery of the bottom plate, and since the storage container has a deeper support portion side, the sewing machine frame In a state where the sewing machine bed is inclined, it can be surrounded by the bed side wall of the sewing machine bed, the storage side wall and the bottom plate of the storage container, and can receive the lubricating oil falling from the sewing machine frame within a sufficiently secured area. . Further, since the lubricating oil is sealed so as not to permeate between the bed side wall portion of the sewing machine bed portion and the storage side wall portion of the storage container, leakage of the lubricating oil can be effectively reduced.

It is a side view of the sewing machine which is one embodiment of the present invention. It is a bottom view of a sewing machine bed part. It is the simplified sectional view of a sewing machine bed part. It is sectional drawing of a sewing machine bed part and a storage container. It is sectional drawing of a sewing machine bed part when a sewing machine frame is tilted, and a storage container. It is a perspective view of a storage container. It is a perspective view of the storage container provided with the oil separator. It is sectional drawing of an upper transmission body, a lower transmission body, and its periphery. It is principle explanatory drawing of an oil quantity display member. 10A shows a reflection image of the gauge when the oil amount is height h1, FIG. 10B shows a reflection image of the gauge when the oil amount is height h2, and FIG. The reflection image of the gauge when the oil amount is the height h3 is shown, and FIG. 10D shows the reflection image of the gauge when the oil amount is the height h4.

[Sewing machine overview]
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The sewing machine 10 according to the embodiment of the present invention is a so-called lockstitch sewing machine, and includes all the configurations of a general lockstitch sewing machine.
FIG. 1 is a front view showing the overall configuration of the sewing machine 10, and FIG. 2 is a bottom view of the sewing machine 10 without a storage container 30 and an under cover 50 described later.
That is, as shown in FIGS. 1 and 2, the sewing machine 10 includes a sewing machine frame 20, a storage container 30 for storing lubricating oil at a lower part of the sewing machine frame 20, an under cover 50, and a needle bar provided with a sewing needle 11. Needle lifting mechanism, balance, cloth pressing mechanism 70 for moving the cloth pressing member, hook mechanism 12, cloth feeding mechanism for intermittently feeding the workpiece on the needle plate at a predetermined sewing pitch, bobbin And a thread tension device 13, a wiper device, a thread trimming device 14 for cutting an upper thread and a lower thread, an oil amount display member 80, a control device 90 for controlling each part, and the like. In addition, illustration is abbreviate | omitted for all the structures which do not attach | subject the code | symbol.
The sewing machine 10 is used by being installed on a sewing machine table T whose top surface is horizontal.
The sewing machine 10 is characterized by the sewing machine frame 20, the storage container 30, the under cover 50, the cloth presser mechanism 70, and the oil amount display member 80, and the configuration other than these is the same as a known configuration. Such explanation is omitted.

[Sewing frame]
The sewing machine frame 20 is parallel to the sewing machine bed part 21 from the sewing machine bed part 21 installed on the sewing machine table T, the standing body part 22 raised from one end part of the sewing machine bed part 21, and the upper end part of the standing body part 22. And a sewing machine arm portion 23 that is extended.
In the following description, the horizontal direction parallel to the longitudinal direction of the machine bed portion 21 is the Y-axis direction, the horizontal direction perpendicular to the Y-axis direction is the X-axis direction, and the X-axis direction and the Y-axis direction. The following description will be given with the vertical vertical direction perpendicular to the Z axis direction.

  The sewing machine arm portion 23 incorporates a sewing machine motor serving as a drive source for the needle up-and-down movement mechanism at one end portion on the standing body portion 22 side, and an upper shaft disposed in parallel to the Y-axis direction from one end portion to the other end portion. Built-in. In addition, a needle up-and-down moving mechanism is built in the end of the sewing machine arm 23 opposite to the vertical body side.

The standing body portion 22 incorporates a transmission mechanism and the like for transmitting the power of the sewing machine motor to each component incorporated in the sewing machine bed portion 21.
The sewing machine bed portion 21 is provided with a needle plate (not shown) on the upper surface on the end side where the needle drop by the sewing needle 11 is performed, and a hook mechanism and a feed dog of the cloth feed mechanism are incorporated below the needle plate. Further, inside the sewing machine bed portion 21, a vertical feed shaft 16 that gives a vertical reciprocating motion to the feed dog, a horizontal feed shaft 17 that gives a reciprocating motion to the feed dog along the X-axis direction, and a shuttle that rotates. A hook shaft for applying force is built in a state along the Y-axis direction.

[Sewing machine bed]
The sewing machine bed portion 21 is placed on the sewing machine table T, and one end portion in the X-axis direction of the sewing machine bed portion 21 is rotatably supported by the support portion 18.
The sewing machine bed portion 21 includes a flat plate-like ceiling portion 211 that is horizontal when installed on the sewing machine table T, and first to fifth bed side wall portions 212 that are suspended downward from the periphery of the ceiling portion 211. 216 and the inner wall part 217, The lower part of the area | region enclosed by the 1st-4th bed side wall parts 212-215 is widely open | released in the bottom part.

The ceiling part 211 is a substantially rectangular flat plate, and the long side is parallel to the Y-axis direction and the short side is parallel to the X-axis direction.
Further, a support portion 18 is provided at one end portion in the X-axis direction of the ceiling portion 211, and the support portion 18 supports the sewing machine bed portion 21 so as to be rotatable around the Y axis with respect to the sewing machine table T. The support portion 18 includes a support shaft along the Y-axis direction, and the entire sewing machine frame 20 can be tilted around the Y-axis. The sewing machine frame 20 can be tilted and tilted by the support portion 18, and the bottom portion of the sewing machine bed portion 21 is exposed so that various operations such as internal maintenance can be performed.
The sewing machine 10 is provided with a needle bar on one side in the direction along the support shaft of the support portion 18 (Y-axis direction), and on the other side with a standing body portion 22. Accordingly, one of the directions along the support shaft (Y-axis direction) is referred to as the “needle bar side”, and the other of the directions along the support shaft (Y-axis direction) is referred to as the “standing trunk portion side”.

  The first bed side wall part 212 and the second bed side wall part 213 are all along the YZ plane, and the first bed side wall part 212 is one end in the X-axis direction of the ceiling part 211 (opposite to the support part side). The second bed side wall 213 is provided on the other end (support side).

  The third bed side wall portion 214 and the fourth bed side wall portion 215 are all along the XZ plane. The third bed side wall 214 is provided in the vicinity of the end of the ceiling 211 on the needle bar side and in front of the shuttle mechanism 12 and rotatably supports the shuttle shaft and the vertical feed shaft 16. Further, the end portion on the front side of the third bed side wall portion 214 is connected to the end portion on the needle bar side of the first bed side wall portion 212.

  The fourth bed side wall 215 is provided at the end of the ceiling 211 on the side of the standing torso, and the front end of the fourth bed side wall 215 is the end of the first bed side wall 212 on the side of the standing torso. The end portion on the support portion side is connected to the end portion of the second bed side wall portion 213 on the standing trunk portion side.

  The fifth bed side wall 216 is along the XZ plane, is located inside the second bed side wall 213, and the end on the support side is closer to the needle bar side end of the second bed side wall 213. It is connected to the position.

FIG. 3 is a cross-sectional view showing a simplified cross-sectional shape along the XZ plane viewed from the needle bar side of the sewing machine bed portion 21.
As shown in FIGS. 2 and 3, the inner wall portion 217 is along the YZ plane, is inside the second bed side wall portion 213, and faces the second bed side wall portion 213. Further, the inner wall portion 217 is connected to the end portion on the needle bar side on the front side end portion of the fifth bed side wall portion 216.
Moreover, this inner wall part 217 becomes a shape which adjoins the 2nd bed side wall part 213 via the step part 217a as it goes to the standing body part side.

Each of the bed side wall portions 212 to 216 and the inner wall portion 217 has a flat lower end surface, and these lower end surfaces have the same height.
The structural significance of the bed side wall portions 212 to 216 and the inner wall portion 217 will be described later based on the relationship with other configurations.

[Storage container]
4 is a cross-sectional view of the sewing machine frame 20 and the storage container 30 along the XZ plane, FIG. 5 is a cross-sectional view of the sewing machine frame 20 tilted around the support portion 18, and FIGS. 6 and 7 are storage containers. FIG.
The storage container 30 is attached to the lower part of the sewing machine bed portion 21 by screws.
As shown in FIGS. 4 to 6, the storage container 30 includes a bottom plate portion 31 and first to sixth storage side wall portions 32 to 37 that are raised substantially vertically upward from the periphery of the bottom plate portion 31. The upper part of the region surrounded by the first to sixth storage side wall portions 32 to 37 is widely open.

As shown in FIG. 4, the bottom plate portion 31 includes a three-step step structure and an inclined surface so that the inner height becomes lower toward the end portion on the support portion side in the X-axis direction. Thereby, as for the storage container 30, the edge part by the side of a support part is deepest.
Further, a rectifying portion 38 having a plurality of convex shapes along the X-axis direction is formed on the needle bar side portion of the upper surface of the bottom plate portion 31. When the sewing machine frame 20 is tilted by the support portion 18, the lubricating oil stored in the storage container 30 flows toward the support portion along the X-axis direction. At this time, the rectifying unit 38 forms a flow along the X-axis direction so that the lubricating oil smoothly moves to the support unit side so as not to jump in other directions.

  The first storage side wall 32 and the second storage side wall 33 are both substantially along the YZ plane, and the first storage side wall 32 is one end (front side) in the X-axis direction of the bottom plate 31, Two storage side wall portions 33 are provided on the other end portion (support portion side).

  The third storage side wall 34 and the fourth storage side wall 35 are both substantially along the XZ plane. The third storage side wall portion 34 is provided in the vicinity of the end of the bottom plate portion 31 on the needle bar side, and the end portion of the third storage side wall portion 34 on the support portion side is the vertical trunk of the sixth storage side wall portion 37. The end portion on the front side is connected to the end portion on the needle bar side of the first storage side wall portion 32.

  The fourth storage side wall portion 35 is provided at the end portion of the bottom plate portion 31 on the standing body portion side, and the end portion on the support portion side is connected to the end portion of the second storage side wall portion 33 on the standing body portion side, The front side end portion is connected to the end portion of the first storage side wall portion 32 on the standing body side.

  The fifth storage side wall portion 36 is substantially along the XZ plane and is provided at the end of the bottom plate portion 31 on the needle bar side. The end of the fifth storage side wall 36 on the support side is connected to the end of the second storage side wall 33 on the needle bar side, and the front end is the needle bar side of the sixth storage side wall 37. It is connected to the end of the.

  The sixth storage side wall portion 37 is substantially along the YZ plane and is provided in the vicinity of the end of the bottom plate portion 31 on the needle bar side.

  And as for each storage side wall part 32-37, the upper end part is all flat, and the height is the same. Furthermore, the upper end surfaces of the storage side wall portions 32, 33, 35, 36, and 37 of the storage container 30 are individually contacted with the bed side wall portions 212, 213, 215, and 216 of the sewing machine bed portion 21 and the lower end surface of the inner wall portion 217. In contact therewith, a plate-shaped packing (not shown) is interposed between them, and is sealed so that no lubricating oil leaks between the upper and lower side walls.

Thereby, each bed side wall part 212-216 of the sewing machine bed part 21 has the inner side opened widely downward, and the lubricating oil supplied to each component in the sewing machine frame 20 constantly falls. Since the storage side wall portions 32 to 36 of the storage container 30 that abuts most of the openings by the bed side wall portions 212 to 216 to the bed side wall portions 212 to 216 via packing are surrounded, the falling lubricant oil is stored. It can be collected and stored in the container 30.
Further, when the sewing machine frame 20 is tilted, the lubricating oil also moves into the support portion side region of the sewing machine bed portion 21, but the upper end surface of each of the storage side wall portions 33, 35, 36, 37 of the storage container 30 and the sewing machine. Since the bed side wall portions 213, 215 and 216 of the bed portion 21 and the lower end surfaces of the inner wall portion 217 are in contact with each other and sealed by packing, leakage of the lubricating oil when the sewing machine frame 20 is tilted can be suppressed.

  Only the third storage side wall 34 of the storage container 30 is arranged so as not to contact any of the bed side wall parts 212 to 216 and the inner wall part 217 of the sewing machine bed part 21. The structure avoids complete sealing with the container 30. That is, outside air can flow from the upper side of the third storage side wall 34, and the lubricating oil in the storage container 30 can be cooled by outside air. As a result, the cooled lubricating oil can be supplied to the inside of the sewing machine frame 20, and the entire sewing machine 10 is cooled.

As shown in FIG. 4, cooling fins 40 are provided on the lower surface of the bottom plate portion 31, and the cooling oil is also cooled by the cooling fins 40.
Further, the rectifying portion 38 on the upper surface of the bottom plate portion 31 described above is provided in the vicinity of the third storage side wall portion 34 so that the lubricant oil does not jump from the third storage side wall portion 34 that is not sealed and leaks to the outside. In addition, rectification of the lubricating oil when the sewing machine frame 20 is rotated in order to be in an inclined state is attempted.

Further, as shown in FIG. 7, an oil separator plate 39 that covers the opening across the entire width in the Y-axis direction is provided at the portion on the support portion side in the opening at the top of the storage container 30.
As described above, the sewing machine frame 20 can be tilted around the support portion 18, but if the tilting operation is performed vigorously, a large amount of lubricating oil has accumulated on the support portion side in the storage container 30. Runs up the second storage side wall portion 33 of the storage container 30, rushes up the second bed side wall portion 213 and the ceiling portion 211 of the sewing machine bed portion 21, flows into the vertical trunk portion 22, and stands upright barrel portion 22 and the sewing machine arm portion 23. May cause leakage of lubricating oil.
However, as shown in FIG. 5, by providing the oil separator plate 39 in the above-described arrangement, the momentum of the lubricating oil flowing into the sewing machine bed portion 21 side can be reduced, and the inflow to the standing trunk portion 22 can be reduced. Suppressing and preventing leakage of lubricating oil.

Further, the inner wall portion 217 of the sewing machine bed portion 21 described above is also arranged to prevent the lubricant oil that has reached the ceiling portion 211 of the sewing machine bed portion from running further when the sewing machine frame 20 is tilted. It is killed to prevent intrusion into the vertical trunk 22.
In addition, the inner wall 217 may also be lubricated with the side surface on the front side, but with the above-described step structure, the inner wall 217 can quickly flow to the upright side, and the leakage of the lubricating oil is also suppressed from this structure. doing.

  In addition, a cylindrical portion 41 is formed vertically above the center portion of the upper surface of the bottom plate portion 31 of the storage container 30, and a lower transmission body 72 of a cloth presser mechanism 70 described later is formed at the center thereof. A through-hole 411 is formed to pass therethrough. This through hole 411 penetrates to the lower side of the storage container 30. Details of the cylindrical portion 41 will be described later together with the configuration of the cloth pressing mechanism 70.

[undercover]
As shown in FIG. 1, the under cover 50 is a tray-like container having an open lower portion of the sewing machine bed portion 21 and an upper portion that accommodates the storage container 30 inside, and is arranged immediately below the sewing machine bed portion 21. It is attached to the table T.
The under cover 50 includes a bottom plate portion 51 having a rectangular shape in plan view, and first to fourth under cover side wall portions 52 to 54 (an under cover side wall portion on the support portion side) raised vertically upward from the periphery of the bottom plate portion 51. The second under cover side wall portion is not shown), and in the upper part thereof, the upper part of the region surrounded by the first to fourth under cover side wall portions 52 to 54 is widely opened.

  As shown in FIG. 1, the bottom surface of the bottom plate portion 51 is formed such that the flat portion 512 on the standing trunk portion side is lower than the flat portion 511 on the needle bar side in the X-axis direction. 512 are connected by an inclined surface 513 having a gentle gradient.

  Each of the first under cover side wall 52 and the second under cover side wall is along the YZ plane, and one end (front side) and the other end (support portion) of the bottom plate 51 in the X-axis direction. Side).

  The third under cover side wall 53 and the fourth under cover side wall 54 are all along the XZ plane. And the 3rd under cover side wall part 53 is provided in the edge part by the side of the needle bar of the baseplate part 51, and the edge part by the side of the support part of this 3rd under cover side wall part 53 is the 2nd under cover side wall part. The end part on the front side is connected to the end part on the needle bar side of the first under cover side wall part 52.

  The fourth under cover side wall portion 54 is provided at the end portion of the bottom plate portion 51 on the vertical trunk portion side, and the end portion on the support portion side is connected to the end portion of the second under cover side wall portion on the vertical trunk portion side. The front end portion of the first under cover side wall 52 is connected to the end portion of the first torso side wall portion 52.

The first under cover side wall portion 52 and the second under cover side wall portion both have first cutout portions 521 and Y formed shallowly downward at substantially the entire width in the Y-axis direction at the upper end portions thereof. There is a second notch 522 formed deeply downward on the vertical trunk side in the axial direction (the second under cover side wall is not shown).
Further, the third under cover side wall portion 53 and the fourth under cover side wall portion 54 are also notched at the upper end portions over almost the entire width in the X-axis direction, but are not shown.

Thereby, the ventilation | gas_flowing inside the undercover 50 can be aimed at, and the internal sewing machine bed part 21 and the storage container 30 can be air-cooled now.
Further, since the flat portion 512 on the standing trunk portion side is formed lower than the flat portion 511 on the needle bar side of the lower surface of the bottom plate portion 51, the first under cover side wall portion 52 and the second under cover side wall are formed. All of the portions can form the second notch portion 522 deeper on the vertical trunk portion side, and the cooling efficiency of ventilation can be improved. In particular, since the storage container 30 is provided on the standing body portion side of the sewing machine bed portion 21, the lubricating oil in the storage container 30 can be efficiently cooled.

  Further, a support portion 514 of the rotation support shaft 74 of the knee-lifting lever 73 of the cloth presser mechanism 70 described later is erected at a position somewhat on the standing torso side on the upper surface inside the bottom plate portion 51 (FIG. 8). reference). A through hole 515 for inserting the rotation support shaft 74 from the outside of the under cover 50 into the support portion 514 is formed at a position below the first under cover side wall portion 52 and closer to the standing body portion side. Yes.

[Cloth holding mechanism]
As shown in FIG. 8, the cloth pressing mechanism 70 includes a cloth pressing member (not shown) that is supported adjacent to the needle bar so as to be movable up and down (not shown), and a pressing spring that presses the cloth pressing member in the downward direction. (Not shown), a link mechanism (not shown) for transmitting the lifting / lowering operation to the cloth pressing member, and an operation for raising / lowering the cloth pressing member to one of the link bodies constituting a part of the link mechanism. An upper transmission body 71, a lower transmission body 72 whose upper end abuts against a lower end of the upper transmission body 71, a manual operation lever (not shown) for imparting an upward movement operation only to the upper transmission body 71, and a lower transmission body A knee-lifting lever 73 that imparts an upward movement motion to 72 (see FIG. 1); Transmission to push up the part And an over-time 75.

  The upper transmission body 71 has a rod shape and is supported so as to be movable up and down inside the standing body portion 22, and its lower end portion extends to the inside of the sewing machine bed portion 21. The cloth pressing member is always pressed downward by the pressing spring.

  The lower transmission body 72 has a rod shape, and is inserted into the through hole 411 formed in the cylindrical portion 41 of the storage container 30 described above. The lower transmission body 72 includes a closing portion that closes the through hole 411 from above. And this obstruction | occlusion part is the flange-shaped 1st obstruction | occlusion part 721 for obstruct | occluding the edge part of the upper end part of the through-hole 411 of the cylindrical part 41 formed in the upper end part of the lower transmission body 72, and 1st It is comprised from the cylindrical 2nd obstruction | occlusion part 722 hanging down from the outer periphery of the obstruction | occlusion part 721. As shown in FIG.

  Since the first closing portion 721 has a flange shape, the lower transmission body 72 is in a state where the first closing portion 721 is lowered, so that the first closing portion 721 is in close contact with the entire upper end surface of the cylindrical portion 41 of the storage container 30 so that lubricating oil does not leak from the through hole 411. Can be sealed.

  The 2nd obstruction | occlusion part 722 is cylindrical, The inner peripheral surface closely_contact | adheres to the outer peripheral surface of the cylindrical part 41 of the storage container 30 over a perimeter. Therefore, the first closing part 721 and the second closing part 722 are integrally connected, and the upper part of the cylindrical part 41 of the storage container 30 has a constant outer diameter. Even if it is moved upward, the inner peripheral surface of the second closing portion 722 can maintain the state in contact with the outer peripheral surface of the cylindrical portion 41 of the storage container 30 over the entire periphery. Therefore, even when the lower transmission body 72 moves upward, the lubricating oil in the storage container 30 can be sealed so as not to leak from the through hole 411 by the cooperation of the first closing portion 721 and the second closing portion 722. .

As described above, the cloth presser mechanism 70 includes the manual operation lever that applies the upward movement operation only to the upper transmission body 71 and the knee-lifting lever 73 that applies the upward movement operation to the lower transmission body 72.
For this reason, when the manual operation lever is operated, since the upper transmission body 71 and the lower transmission body 72 are separated from each other vertically, only the upper transmission body 71 moves upward and the cloth presser member rises. The press release operation is performed.
Further, when the knee-lifting lever 73 is rotated to the standing torso side by the knee, the lower transmission body 72 pushes up the upper transmission body 71 so that they are integrally raised, the cloth pressing member is raised, and the press release operation is performed. Done.

For example, when the sewing machine frame 20 is in a tilted state, there is a case where the cloth pressing member is lifted to release the press in order to perform thread winding by the thread winding device. The raising movement of the cloth pressing member is operated by the operation lever. In addition, when the sewing machine frame 20 is tilted, the lower end portion of the lower transmission body 72 is separated from the transmission arm 75, so that the operation with the knee raising lever 73 cannot be performed.
With such a structure, even when the sewing machine frame 20 is tilted with the cloth holding member released by the manual operation lever, the lower transmission body 72 does not rise, and the first closing portion 721 and the second closing portion 722 are not moved. Since both maintain the closed state of the through hole 411 of the cylindrical portion 41, it is possible to more effectively prevent the lubricating oil flowing inside the storage container 30 from leaking through the through hole 411.

[Oil level indicator]
As shown in FIGS. 4, 9, and 10, the oil amount display member 80 is a rod-shaped body made of a cylindrical or prismatic transparent material (transparent resin or glass), and is erected vertically in the sewing machine bed portion 21. ing. In addition, you may make it incline somewhat, without making it strictly perpendicular | vertical.
The oil amount display member 80 has a smooth surface 81 as an upper end portion perpendicular to the longitudinal direction formed at the upper end portion thereof, and the upper end portion is disposed so as to be exposed to the outside from the upper surface of the sewing machine bed portion 21. ing. The amount of lubricating oil in the storage container 30 can be seen from the smooth surface 81 at the upper end.
An inclined surface 82 that is inclined at a predetermined angle with respect to the longitudinal direction is formed at the lower end of the oil amount display member 80. Further, at the lower end of the oil amount display member 80 and at a position facing the inclined surface 82, first and second gauges 83 and 84 indicating the oil amount are provided side by side. These gauges 83 and 84 are strips along the horizontal, and have a certain width in the vertical direction. These gauges 83 and 84 are colored in different colors.

The relationship between the amount of liquid in the storage container 30 and the heights of the first and second gauges 83 and 84 will be described with reference to FIG.
The range of the height from the upper end portion of the first gauge 83 on the upper side to the lower end portion of the second gauge 84 indicates an appropriate amount range of the lubricating oil in the storage container 30. Accordingly, the height h2 is in the range of an appropriate amount of oil. Further, since the height h1 is less than an appropriate amount, the lack of lubricating oil is indicated. Further, the height h3 indicates an upper limit of an appropriate amount, and if it exceeds this, lubricating oil is excessively added.

Next, reflection and transmission of the inclined surface 82 will be described. When the incident angle of the light incident on the inclined surface 82 exceeds a critical angle determined by the refractive index inside the inclined surface 82 and the external refractive index, the light is reflected and transmitted below the critical angle.
The critical angle determined by the forming material of the oil amount display member 80 and the refractive index of air is smaller than the incident angle of light in the direction from the gauges 83 and 84 toward the reflecting surface, and is therefore immersed in the lubricating oil on the inclined surface 82. Reflection occurs in the range where the light is not reflected, and a reflected image of the gauge 83 or 84 can be seen from the smooth surface 81.
On the other hand, the critical angle determined by the material for forming the oil amount display member 80 and the refractive index of the lubricating oil is larger than the incident angle of light in the direction from the gauges 83 and 84 toward the reflecting surface. In the range immersed in the surface, transmission occurs, and the reflected image of the gauge 83 or 84 cannot be seen from the smooth surface 81.

For this reason, when the amount of the lubricating oil in the storage container 30 is small and does not reach the lower end of the second gauge 84 (for example, at the height h1), the first and second gauges 83 and 84 As shown in FIG. 10A, all of the incident holes are reflected and the reflected images of both the first and second gauges 83 and 84 are visible.
In addition, when the lubricating oil in the storage container 30 is in an appropriate amount, that is, in the range between the upper end of the first gauge 83 and the lower end of the second gauge 84 (for example, at the height h2), the second The incident hole from one gauge 83 is reflected and the incident hole from the second gauge 84 is transmitted, so that only the reflected image of the first gauge 83 can be seen as shown in FIG. .
Further, when the lubricating oil in the storage container 30 is at the upper limit of an appropriate amount, that is, when it is at the height of the upper end portion of the first gauge 83 (for example, at the height h3), the upper end of the first gauge 83. Only the incident hole of the portion at the time of the portion is reflected, the incident hole from the second gauge 84 is transmitted, and the portion of the portion at the upper end portion of the first gauge 83 is transmitted as shown in FIG. Only the reflected image is visible.
Further, when the lubricating oil in the storage container 30 exceeds the upper limit of an appropriate amount, that is, when the height of the upper end portion of the first gauge 83 is exceeded (for example, at the height h4), the first gauge 83 and the incident holes from the second gauge 84 are both transmitted, and as shown in FIG. 10D, the reflected images of any of the gauges 83 and 84 are completely invisible.

  Accordingly, the oil amount display member 80 can display the state of the oil amount of the lubricating oil in the storage container 30 in a stepwise manner with a simple configuration.

[Technical effects of the embodiment of the invention]
The sewing machine 10 seals the lubricating oil from passing between a plurality of bed side wall portions including the support portion side of the sewing machine bed portion 21 and a plurality of storage side wall portions including the support portion side of the storage container 30, and stores the lubricating oil. Since the bottom plate portion 31 of the container 30 is formed so that the end portion on the support portion side is deepest as compared with other portions, a sufficient capacity can be secured, and the bottom plate portion can be secured even when the sewing machine frame 20 is tilted. Lubricating oil can be stored in the deep part of 31, and generation | occurrence | production of the external leakage of lubricating oil can be reduced effectively.

  The sewing machine 10 is provided at the end of the storage container 30 on the support side and includes an oil isolation plate 39 that covers a part of the opened upper part of the storage container 30, so that the lubrication that moves when the sewing machine frame 20 is tilted is provided. The flow of oil can be reduced, and the occurrence of external leakage of the lubricating oil can be further effectively reduced by entering the standing body portion 22 or the like.

  Further, in the sewing machine 10, the convex strip rectifying portion 38 is provided on the bottom plate portion 31 of the storage container 30 along the direction from the front end of the storage container 30 to the end of the support section. The flow of the lubricating oil that moves when the frame 20 is tilted is guided to the support portion side, and on the other hand, the occurrence of external leakage of the lubricating oil from, for example, the third storage side wall portion 34 whose upper portion adjacent to the rectifying portion 38 is opened. Can be effectively reduced.

The sewing machine 10 includes an inner wall portion 217 that is suspended from the ceiling portion 211 of the sewing machine bed portion 21 and faces the second bed side wall portion 213 inside the second bed side wall portion 213 on the side of the support portion. The inner wall portion 217 reduces the flow of the lubricating oil that moves when the sewing machine frame 20 tilts, and the occurrence of external leakage of the lubricating oil can be further effectively reduced.
Further, the end on the needle bar side of the inner wall portion 217 is connected to the fifth bed side wall portion 216 of the sewing machine bed portion 21 along the direction intersecting the support shaft of the support portion 18 (X-axis direction), Since the inner wall portion 217 has a shape that is closer to the second bed side wall portion 213 toward the end portion on the standing trunk portion side, the lubricating oil that moves when the sewing machine frame 20 is tilted has an upper surface (on the front side). Even if it rises to the surface), it can be quickly returned to the support part side. Therefore, it is possible to reduce the occurrence of a state in which the lubricant oil stays at a position other than the planned storage portion, and it is effective for the occurrence of the external leakage of the lubricant oil and the invasion of the unscheduled portion due to this. Can be reduced.

  Further, the sewing machine 10 includes an under cover 50 that accommodates the storage container 30 on the lower side of the sewing machine bed portion 21, and the lower surface of the bottom plate portion 51 of the under cover 50 is from a flat portion 511 that is an end portion on the needle bar side. Also, the flat portion 512 which is the end portion on the opposite side is formed to be low. As a result, the second notch 522 can be formed deeper at a position closer to the end of the first and second undercover side wall portions 52 of the undercover 50 on the side of the standing trunk portion. The inner sewing machine bed 21 and the storage container 30 can be cooled with outside air. Accordingly, the lubricating oil cooled in the storage container 30 can be supplied, and the entire sewing machine can be cooled.

In addition, the sewing machine 10 transmits a press release operation to the cloth pressing member, and an upper transmission body 71 whose lower end portion is located inside the sewing machine bed portion 21 and a lower portion whose upper end portion is in contact with the lower end portion of the upper transmission body 71. A transmission body 72, a manual operation lever that imparts an upward movement operation only to the upper transmission body 71, and a knee-lifting lever 73 that imparts an upward movement movement operation to the lower transmission body 72, and the lower transmission body 72 has a cylindrical shape A first closing portion 721 that closes the periphery of the through hole 411 on the upper end surface of the portion 41 and a second closing portion 722 that contacts the upper outer peripheral surface of the tubular portion 41 are provided.
For this reason, even when the sewing machine frame 20 is tilted while the cloth pressing member is moved upward by the operation of the manual operation lever, the lower transmission body 72 does not rise, so that the through holes 411 are blocked by the blocking portions 721 and 722. The state can be maintained satisfactorily, and the occurrence of external leakage of the lubricating oil can be further effectively reduced.

Further, the sewing machine 10 includes a transparent rod-shaped oil amount display member 80 that penetrates the ceiling portion 211 of the sewing machine bed portion 21, and a lower end portion thereof reaches the inside of the storage container 30, and the oil amount display member 80 includes the lower end thereof. The inclined surface 82 has an inclined surface 82, and the inclined surface 82 reflects the inner surface according to the liquid level of the lubricating oil, so that the two gauges 83 and 84 formed at the opposite portions have different heights. The amount of the lubricating oil is displayed in a stepwise manner according to the number of the reflected images of the gauges 83 and 84 reflected on the smooth surface 81.
Therefore, it becomes possible to recognize in detail the amount of lubricating oil in the storage container 30 with a simple configuration.

[Others]
In the above-described embodiment, the case where the sewing machine 10 is a lockstitch sewing machine has been exemplified. However, various types of configurations that exhibit the above technical effects can be applied to all types of sewing machines that use lubricating oil.

DESCRIPTION OF SYMBOLS 10 Sewing machine 11 Sewing needle 18 Support part 20 Sewing machine frame 21 Sewing machine bed part 22 Standing trunk part 23 Sewing machine arm part 30 Storage container 31 Bottom plate part 32-37 Storage side wall part 38 Rectification part 39 Oil isolation plate 40 Cooling fin 41 Cylindrical part 50 Undercover 51 Bottom plate portions 52 to 54 Undercover side wall portion 70 Cloth pressing mechanism 71 Upper transmission body 72 Lower transmission body 73 Knee lift lever 74 Rotating support shaft 80 Oil amount display member 81 Smooth surface (upper end surface)
82 Inclined surface 83 1st gauge 84 2nd gauge 211 Ceiling part 212-216 Bed side wall part 217 Inner wall part 217a Step part 411 Through hole 511 Flat part 512 Flat part 515 Through hole 521,522 Notch part 721 1st obstruction | occlusion Part 722 second closing part T sewing machine table

Claims (8)

A sewing machine frame having a sewing machine bed portion including a ceiling portion and a bed side wall portion hanging downward from the periphery of the ceiling portion and having a bottom portion opened;
In a sewing machine comprising a support portion that supports the sewing machine frame so as to be rotatable about a horizontal support shaft with respect to a sewing machine table,
Comprising a bottom plate portion and a storage side wall portion raised from the entire periphery of the bottom plate portion, comprising a lubricating oil storage container having an open top portion;
While the bed side wall portion on the support portion side of the sewing machine bed portion and the storage side wall portion on the support portion side of the storage container are in contact with each other, sealing is performed so that no lubricating oil passes between them.
The bottom plate portion of the storage container is formed so that the end portion on the support portion side is deepest compared to other portions ,
The horizontal direction parallel to the longitudinal direction of the machine bed portion is the Y-axis direction, the horizontal direction perpendicular to the Y-axis direction is the X-axis direction, and the vertical vertical direction is perpendicular to the X-axis direction and the Y-axis direction. Z-axis direction
The storage side wall
A first storage side wall portion formed along the YZ plane and provided on the front side of the bottom plate portion;
A second storage side wall portion formed along the YZ plane and provided on the support portion side of the bottom plate portion;
A third storage side wall portion formed along the XZ plane and provided in the vicinity of the needle bar side end portion of the bottom plate portion;
A fourth storage side wall portion formed along the X-Z plane and provided at an end portion of the bottom plate portion on the standing body portion side;
A fifth storage side wall formed along the X-Z plane and provided at the end of the bottom plate on the needle bar side;
A sixth storage side wall formed along the YZ plane and provided at the end of the bottom plate on the needle bar side;
With
The end of the third storage side wall portion on the support portion side is connected to the end portion of the sixth storage side wall portion on the standing trunk portion side,
The front side end of the third storage side wall is connected to the needle bar side end of the first storage side wall,
An end portion on the support portion side of the fourth storage side wall portion is connected to an end portion on the standing trunk portion side of the second storage side wall portion,
The end part on the front side of the fourth storage side wall part is connected to the end part on the standing trunk part side of the first storage side wall part,
The end of the fifth storage side wall on the support portion side is connected to the end of the second storage side wall on the needle bar side, and the front end of the fifth storage side wall is the sixth storage side wall. Connected to the end of the needle bar side of
The bed side wall
A first bed side wall formed along the YZ plane and provided on the front side of the ceiling;
A second bed side wall portion formed along the YZ plane and provided on the support portion side of the ceiling portion;
An end portion on the needle bar side of the first bed side wall is formed along the XZ plane and is provided near the needle bar side end portion of the ceiling portion and in front of the shuttle mechanism. A third bed side wall connected to
It is formed along the XZ plane and is provided at the end portion on the standing body portion side, the front side end portion is connected to the end portion on the standing body portion side of the first bed side wall portion, and the end portion on the support portion side Is a fourth bed side wall connected to the end of the second bed side wall on the side of the standing torso,
It is formed along the XZ plane, is located inside the second bed side wall, and the end on the support side is connected to a position near the end on the needle bar side of the second bed side wall. A fifth bed side wall,
An inner wall portion hanging from the ceiling portion of the sewing bed portion;
The inner wall portion is formed along the YZ plane, is inside the second bed side wall portion and faces the second bed side wall portion, and an end on the needle bar side is a front surface of the fifth bed side wall portion. Connected to the end of the side,
The sewing machine according to claim 1, wherein the inner wall portion has a shape that is closer to the second bed side wall portion toward the vertical trunk portion side . The upper end surface of the first storage side wall portion and the lower end surface of the first bed side wall portion abut,
The upper end surface of the second storage side wall portion and the lower end surface of the second bed side wall portion abut,
The upper end surface of the fourth storage side wall portion and the lower end surface of the fourth bed side wall portion abut,
The upper end surface of the fifth storage side wall and the lower end surface of the fifth bed side wall abut,
The upper end surface of the sixth storage side wall and the lower end surface of the inner wall abut,
2. The sewing machine according to claim 1, wherein the lubricating oil is sealed so as not to pass between the upper end surface of the storage side wall portion in contact with the lower end surface of the bed side wall portion and the inner wall portion. The sewing machine according to claim 1 , further comprising an oil isolation plate provided at an end of the storage container on the support part side and covering a part of the opened upper part of the storage container. The rectification | straightening part of the protruding item | line along the direction which goes to the edge part of the said support part side from the edge part of the front side of the said storage container was provided on the baseplate part of the said storage container, The Claim 1 to 3 The sewing machine according to any one of the above. An under cover that houses the storage container inside the sewing machine bed portion below,
The under cover includes a bottom plate portion and an under cover side wall portion raised from the entire periphery of the bottom plate portion, and the entire upper portion is open.
The lower surface of the bottom plate portion of the under cover is formed such that the end on the opposite side is lower than the end on the needle bar side in the longitudinal direction of the sewing bed portion,
Rotation of a knee-lifting lever that raises the cloth pressing member to a position near the end opposite to the needle bar side in the longitudinal direction of the sewing machine bed portion in the longitudinal direction of the sewing machine bed portion along the longitudinal direction of the sewing bed portion While forming a through hole to pass the support shaft,
A top end portion of the under cover side wall portion, claim 1, wherein the needle bar side in the longitudinal direction of the bed portion forming the cutout portion at the position of the opposite side of the end portion closer 4 The sewing machine according to any one of the above. A cloth presser member for pressing the sewing product from above on the needle plate;
An upper transmission body that is supported by the sewing machine bed portion so as to be movable up and down, transmits a press release operation to the cloth pressing member by an ascending operation, and has a lower end portion located inside the sewing bed portion;
A lower transmission body, which has an upper end abutting against a lower end portion of the upper transmission body and is passed through the through-hole of the storage container so that the lower end protrudes to the outside and is supported by the storage container so as to be movable up and down;
A manual operation lever for imparting an upward movement operation only to the upper transmission body;
A knee-raising lever that imparts an upward movement to the lower transmission body;
The sewing machine according to claim 1 , wherein the lower transmission body has a closing portion that closes the through hole from above. A through hole through which the lower transmission body passes is formed at the center of a cylindrical portion erected upward from the bottom plate portion of the storage container,
The closed portion of the lower transmission body is composed of a first closed portion that closes the periphery of the through hole in the upper end surface of the cylindrical body and a second closed portion that is in close contact with the upper outer peripheral surface of the cylindrical body. The sewing machine according to claim 6, wherein: Comprising a transparent bar-like oil amount display member that penetrates the ceiling of the sewing machine bed and whose lower end reaches the inside of the storage container;
The oil amount display member has an inclined surface at a lower end thereof, and the inclined surface performs internal reflection according to the liquid level height of the lubricating oil, and the heights formed at the opposite portions are different. While reflecting the gauge of the book to the end face of the upper end,
The sewing machine according to any one of claims 1 to 7 , wherein the amount of the lubricating oil is displayed in a stepwise manner in accordance with the number of reflected images of the gauge reflected on the end face of the upper end portion.

Images