JPH10113491A - Sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent staining of a sewn product processed by a sewing machine by lubrication oil. SOLUTION: A machine frame 51 is divided by a shielding wall 61 into a face part 58 which has a built in driving mechanism containing a needle bar, a balance, a presser and son, and an oiling part 60 outside of the face part 58. Also, each assembling part in the face part 58 does not require oiling and the ones in the oiling part 60 need oiling. The oiling part 60 contains an associated oil pan 52 and the part is sealed as one. A part 74 where a shuttle and a feed dog are located is placed outside of the oiling part 60, and the assembling parts in the part 74 do not require oiling. Those parts, extended from the oiling part 60 or the part 74 of the shuttle and a vicinity of the same, are penetrating through the shielding wall 61 or a jointing part 68 where the oil pan 52 is joined with the frame 51. The above said penetrating points where those parts, extended from the oiling part 60 or a part 74 in the vicinity of the shuttle, are penetrating are installed with oil seals 66, 67 and 73.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a sewing machine in which lubricating oil is forcibly supplied to at least a part of a movable part.

[0002]

2. Description of the Related Art In general, the following methods using an oil pan and a pump are known as oiling methods for each movable part of an industrial lockstitch sewing machine. That is, in the conventional sewing machine A shown in FIG. 4, the oil pan 2 is arranged below the sewing machine frame 1, and the oil supply pump 3 is arranged on the oil pan 2. The pump 3 transmits the lubricating oil accumulated in the oil pan 2 to the upper shaft (for driving a needle bar and the like) in the sewing machine frame 1 through a tube 4 shown in a partially broken manner. To the shaft 5).

The oil sent to the upper shaft 5 passes through the inside of the upper shaft 5 and is sent to a front metal 6, a middle metal 7, and a rear metal 8, which are bearings of the upper shaft 5. Further, the oil is sent from the upper shaft 5 to the surface portion 9 in which a mechanism for driving the needle bar and the balance is built, and is supplied to each mechanical component in the surface portion 9. The oil supplied to the inside of the upper shaft 5 scatters from the hole 10 provided at the rear end of the upper shaft 5 to the outside of the upper shaft 5 and impinges on the oil viewing window 11 made of a transparent member. , Oil viewing window 11
By applying oil, the refueling state can be visually confirmed.

The oil scattered from the hole 10 of the upper shaft 5 is
A pair of bevel gears 12 and 13 near the hole 10 of the upper shaft 5
And a pair of bevel gears 14 below the hole 10 of the upper shaft 5,
15 and other mechanical parts in the sewing machine frame 1 so that these mechanical parts are supplied with oil. The pair of upper bevel gears 12 and 13 transmits the rotation of the upper shaft 5 to the transmission shaft 16, and the pair of lower bevel gears 14 and 15 transmits the rotation of the transmission shaft 16 to the lower shaft ( This is for transmitting power to a transmission shaft 18 for driving the shuttle 17.

[0005] On the other hand, the pump 3 removes the oil accumulated in the oil pan 2 through a tube 19 shown in a partially broken manner and a lower shaft 1 below the bed 20 in the sewing machine frame 1.
8 to feed oil. And the lower shaft 18
The oil fed into the inside is forcibly supplied to the lower shaft front metal 21 and the shuttle 17 serving as bearings for the lower shaft 18. In addition, kettle 17
The excess oil supplied to the pot 1
As a result, oil is sprayed on the feed dog near the shuttle 17 and a mechanism component for driving the feed dog along a fixed trajectory, and the oil is supplied.

As shown in FIG. 5, the feed dog drive shaft 22 for moving the feed dog along a fixed locus reaches from the inside of the oil pan 2 to the shuttle 17 and the feed dog peripheral portion 23. Oil always penetrates from the front metal 24 which becomes the bearing of the drive shaft 22 to the hook and the feed dog peripheral portion. The sewing machine frame 1 is placed on the oil pan 2 by its own weight. When the sewing machine frame 1 is lowered on the sewing machine base for maintenance or the like, the oil pan 2
The oil pan 2 remains on the sewing machine stand with the top open.
The oil inside is exposed to the outside.

On the other hand, the press-up mechanism 25 shown in FIG. The presser raising mechanism 25 is for raising the presser 26 of the sewing machine A, which constantly presses the sewing product from above during the sewing operation, when changing the sewing product. Then, in the holding-up mechanism 25, when the sewer presses the knee abutment cover 27 with the foot in the direction of the arrow a, the knee abutment shaft mounting arm 28 attached to the knee abutment plate in the cover 27 moves the knee abutment horizontal axis. The shaft 29 rotates in the direction of the arrow b integrally with the horizontal axis 29 of the knee, and the rotating plate 30 provided on the horizontal axis 29 of the knee rotates integrally with the horizontal axis 29 of the knee.

As a result, the knee pressing rod 31 connected to the knee rotating plate 30 rises, and the upper knee connecting rod 32 engaged with the knee pressing rod 31 rises. And the connecting rod 3 on the knee
The upper knee link 33 connected to 2 rotates about the axis 34, and the upper horizontal bar 35 connected to the upper knee link 33 moves in the direction of arrow c. Accordingly, the lifting link 36 connected to the upper knee horizontal bar 35 rotates in the direction of arrow d about the shaft 37, and the lifting plate 38 connected to the lifting link 36 rises.

Then, the presser bar holder 39 engaging with the lifting plate 38 is raised, the presser bar 40 fixed to the presser bar holder 39 is raised, and the presser 26 fixed to the presser bar 40 is raised. It has become. Further, since the press-up mechanism 25 as described above is built in the sewing machine frame 1, the surface portion 9 in the sewing machine frame 1 and other parts are in communication with each other. The oil scattered from the hole 10 of the shaft 5 became mist and reached the surface 9 side.

[0010] Then, since the oil that has reached the surface portion 9 accumulates at the bottom portion of the surface portion 9, in order to collect and recirculate the oil accumulated in the surface portion 9, a recirculation pipe connected to the pump (partly broken) (Shown in FIG. 4) is provided with a recirculation mechanism provided with a felt 42 for absorbing oil and the like at the tip of 41. Further, in the above-described sewing machine A, lubrication is performed on the surface portion 9 having a mechanism for driving the presser, the needle bar, and the balance, the shuttle 17, the feed dog, and the drive mechanism of the feed dog. A part of the oil thus obtained comes into contact with the upper thread, the lower thread and the sewing product, and the sewing product has been stained with oil. In recent years, a sewing machine which does not generate oil stains as much as possible due to the upgrading of sewing products has been demanded by users, and mechanical parts, the shuttle 17 and the feed dog of the surface portion 9 which may come into contact with the upper thread, the lower thread, and the sewing product. A sewing machine has been developed in which the mechanical parts around the machine are oil-free, and the sewing products are prevented from being stained with oil.

[0011]

By the way, in the above-mentioned sewing machine, even if the mechanical parts on the surface and the mechanical parts around the shuttle and the feed dog are made oil-free, oil stains on the sewn product are not necessarily eliminated for the following reasons. Could not be completely prevented. In other words, on the upper side of the sewing machine, even if the inside of the surface is not lubricated, as described above, the press-up mechanism is arranged so that the inside of the sewing machine frame extends from the portion other than the surface to the surface together with the upper shaft. In the state where the surface and the part other than the surface communicate with each other, the oil in the state of being scattered and sprayed from the hole of the upper shaft will enter the surface side,
Oil adhered to each mechanism part in the surface, and there was a possibility that the upper thread and the sewn product would be stained with oil.

In addition, even when the shuttle portion and the feed mechanism are not lubricated on the lower side of the sewing machine so that oil does not scatter from the shuttle, the lower shaft and the feed dog drive that reach the shuttle and the feed mechanism from the oil pan side. The shaft is arranged, and the periphery of the shuttle and the feed mechanism is not completely shielded from the oil pan.There is a high possibility that oil will enter the periphery of the shuttle and the feed mechanism. And the sewing products could be stained with oil.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has been made to eliminate the need for lubrication of the mechanical parts, the shuttle, and the feed mechanism on the surface of the sewing machine, and to change the parts that are not lubricated to the parts that are not lubricated. An object of the present invention is to provide a sewing machine that can completely prevent oil stains on a sewing product by completely preventing oil from entering the sewing machine.

[0014]

According to a first aspect of the present invention, there is provided a sewing machine comprising: a surface on which a non-lubricating mechanical component for driving a needle bar, a balance, a presser, etc. is disposed; An oil supply unit is provided, and a shielding unit for shielding the surface unit and the oil supply unit is provided between the surface unit and the oil supply unit. The mechanical unit of the surface unit and the mechanical component of the oil supply unit are provided in the shield unit. The above-mentioned problem is solved by providing a through-hole through which a connecting member for connecting the first member and the second member penetrates, and closing a gap around the connecting member in the through-hole with a seal member.

According to the above configuration, the shielding portion is provided between the surface portion and the oil supply portion, and the gap of the through hole through which the connecting member of the shielding portion penetrates is closed by the sealing member. The lubricating oil can be prevented from entering the oil supply section. By eliminating the need for lubrication of the mechanical parts in the surface part and preventing oil from entering the surface part from the lubrication part, the mechanical parts in the surface part do not cause the upper thread and sewing products to be contaminated with oil. Oil stains on the upper thread and the sewing product can be reliably prevented.

That is, even if the mechanical parts in the surface are not lubricated, there is a possibility that the upper thread or the sewn product may be contaminated with oil due to oil entering the surface from the oil supply unit. By preventing oil from entering the surface, oil stains can be reliably prevented. In addition, lubrication is performed on the mechanical components in the lubrication unit, and the reliability of the sewing machine can be maintained.

The non-lubricating mechanical parts for driving the needle bar, the balance, the presser, etc. in the above-mentioned surface portion are basically the mechanism arranged in the surface portion for driving the needle bar, the balance, the presser, and the like. The mechanical parts of the lubricating unit are the mechanical parts in the plane, the shuttle, the feed dog, etc., for driving the mechanical parts in the plane, the shuttle, the feed dog, etc. It is for transmitting to. In addition, the connecting member,
It is a member that connects the mechanical parts of the refueling part and the mechanical parts of the face part and transmits power from the mechanical parts of the fueling part to the mechanical parts in the face part. It will be a part.

That is, the mechanical parts of the oil supply unit and the mechanical parts of the face part do not exist completely independently, but are connected by a connecting member and constitute a part of the mechanical parts of the sewing machine as a whole. . Further, the face portion is disposed in the distal end portion of the arm of the sewing machine frame, and the refueling portion is disposed in the rear portion of the arm.

The shielding portion is basically a wall-like portion that separates the front end of the arm having a surface portion in the sewing machine frame from the rear end excluding the front end, but the shape is not particularly limited. Instead, it is only necessary to be able to partition the front and rear portions of the sewing machine frame in a shielded state. Further, the seal member is, for example, a so-called O-ring or oil seal, which suppresses the movement of oil toward the surface while the connecting member is movable in the through hole of the shielding portion. is there.

According to a second aspect of the present invention, there is provided a sewing machine in which a lubricating unit in which a lubricating mechanical component and an oil pan for supplying oil to the mechanical component are disposed, an oil-free shuttle and a feed dog are disposed. A hook portion is provided between the refueling portion and the hook portion, and a shielding portion for shielding the refueling portion and the hook portion is provided between the refueling portion and the hook portion. Means for solving the above problem are that a through-hole through which a connecting member for connecting the shuttle and the feed dog penetrates is provided, and a gap around the connecting member in the through-hole is closed by a seal member.

According to the above construction, the shielding portion is provided between the periphery of the shuttle and the oil supply portion, and the gap of the through hole through which the connecting member of the shielding portion passes is closed by the sealing member. Lubricating oil can be prevented from entering from the oil supply section having the oil pan in the periphery of the shuttle. By eliminating the need for lubrication of the hook and feed dog, and preventing oil from entering the periphery of the hook from the lubrication unit, the hook and feed dog do not cause the lower thread or sewing material to become dirty with oil. Oil stains on the lower thread and the sewing product can be reliably prevented.

That is, even if the shuttle and the feed dog are made oil-free,
There is a possibility that the lower thread and the sewn product will be contaminated with oil due to the oil entering the periphery of the hook from the oil supply unit.However, by preventing the oil from entering the periphery of the hook with the above-mentioned shield portion and the seal member, Oil stains can be reliably prevented. In addition, lubrication is performed on the mechanical components in the lubrication unit, and the reliability of the sewing machine can be maintained.

In the periphery of the hook where the shuttle and the feed dog are arranged, it is necessary that the mechanical components for driving the shuttle and the feed dog be oil-free. Further, the shuttle hook peripheral portion is basically a portion below the bed of the sewing machine below the tip having the surface of the arm. Further, the refueling section and the mechanical parts to be refueled in the refueling section are the same as those in the first aspect. Further, the sealing member is the same as in the first aspect.

The connecting member connects a mechanical component of the refueling unit with a mechanical component for driving the shuttle and the feed dog in the periphery of the shuttle and transmits power from the mechanical component of the refueling unit to the shuttle and the feed dog. In some cases, it may be a part of a mechanical part of the refueling unit or a mechanical part around the shuttle. That is, the mechanical part of the refueling unit and the shuttle and the feed dog in the periphery of the shuttle are not completely independent, but are connected by a connecting member and constitute a part of the mechanical part of the sewing machine as a whole. is there.

The above-mentioned oil pan is basically an oil tank arranged below the oil supply section in the sewing machine frame. Further, the shielding portion is, for example, a partition between the periphery of the shuttle below the bed and an oil supply portion in the sewing machine frame and an oil pan arranged below the sewing machine frame, for example, a side wall of the oil pan. And part of the sewing machine frame.

The side wall of the oil pan and the sewing machine frame are in close contact with each other, and the oil pan and the oil supply section are sealed by the side wall of the oil pan and the sewing machine frame. It is preferable that the portion is completely shielded. Also,
In order to make the oil pan and the refueling part a closed structure,
It is preferable that the rear portion of the sewing machine frame and the oil pan are integrally connected.

According to a third aspect of the present invention, there is provided a non-lubricating machine that drives a needle bar, a balance, a presser, and the like, in which a mechanism component to be lubricated and an oil pan for supplying oil to the mechanism component are disposed. A surface portion on which the converted mechanical parts are disposed, and a hook peripheral portion on which an oilless hook and a feed dog are disposed are provided, and between the surface portion and the refueling portion, these surface portions, the refueling portion, A first shielding portion for shielding the oil supply portion and the hook peripheral portion is provided between the refueling portion and the hook peripheral portion, and a second shielding portion for shielding the refueling portion and the hook peripheral portion is provided between the refueling portion and the hook peripheral portion. A first through-hole is provided through which a first connecting member for connecting the mechanical part of the surface part and the mechanical part of the oil supply part penetrates, and a first through-hole around the first connecting member in the first through-hole is provided. A machine in which a gap is closed by a first seal member and the second shield portion is refueled. A second through-hole is provided through which a second connecting member connecting the component to the shuttle and the feed dog penetrates, and a gap around the second connecting member in the second through-hole is a second seal member. It is a means for solving the above-mentioned problem that the object is closed.

According to the above configuration, similarly to the configuration of the first aspect, oil stains on the upper thread and the sewn product can be reliably prevented. Similarly, oil stains on the lower thread and the sewing product can be reliably prevented. That is, it is possible to reliably prevent the sewing product from being stained with the lubricating oil of the sewing machine. Also,
As in the case of the first and second aspects, lubrication is performed on the mechanical components in the lubrication unit, and the reliability of the sewing machine can be maintained.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A sewing machine according to an embodiment of the present invention will be described below with reference to the drawings. FIGS. 1, 2 and 3 show a sewing machine B of this example. As shown in FIG. 1, the sewing machine B of this example includes a sewing machine frame 51 serving as a frame, an oil pan 52 coupled to a lower portion of the sewing machine frame 51, and mechanical components of the sewing machine B.

The sewing machine frame 51 comprises a bed 53 and an arm 54 standing upright from the rear end of the bed 53. The bed 53 is provided with a feed dog (not shown) for placing a cloth to be sewn and moving the bed in accordance with the sewing. Arm 54
Is erected from a bed 53 and has a hollow support 55
And the inside extending along the bed 53 from the support portion 55 has a hollow extending portion 56.

Further, a portion on the distal end side of the distal end portion 57 of the extension portion 56 of the arm 54 is a surface portion 58 on which mechanical components such as a needle bar, a balance, and a press (not shown) are arranged. A mechanical part which needs oiling, which will be described later, is arranged in a rear part 59 of the sewing machine frame 51 excluding a front end part 57, and forms an oiling part 60 together with the oil pan 52. A shielding wall (shielding portion) 61 is formed between the front end portion 57 and the rear portion 59 in the sewing machine frame 51 to divide and divide the internal space of the sewing machine frame 51 into two.

The shielding wall 61 is for shielding the front end 57 of the sewing machine frame 51 having the surface portion 58 and the rear portion 59 of the sewing machine frame 51 forming the oil supply section 60. There are formed two through holes 64 and 65 through which the upper shaft 62 and the horizontal shaft 63 of the holding-up mechanism pass. The upper shaft 62 is provided in the through hole 64.
Is penetrated, and an oil seal 66 is provided.
The through hole 64 is closed in a state where the upper shaft 62 is rotatable, so that the lubricating oil is prevented from entering the rear end 59 of the sewing machine frame 51 from the front end 57 side.

The through hole 65 is provided with an oil seal 67 in a state where the horizontal shaft 63 passes therethrough.
The lubricating oil is prevented from entering from the rear portion 59 to the tip portion 57 side. A lower portion of the support portion 55 of the sewing machine frame 51 is a connection portion 68 formed in a tubular shape without a bottom, so that the oil pan 52 is connected thereto.

Further, a through hole 70 through which a lower shaft 69 to be described later shown in FIG. 1 penetrates, and a feed dog driving shaft 7 to be described later shown in FIG.
A through-hole 72 through which 1 passes is formed. And
The through hole 70 is provided with an oil seal 73 in a state where the lower shaft 69 penetrates, and the through hole 70 is closed in a state where the lower shaft 69 is rotatable. The lubricating oil is prevented from entering the part 74 through the through hole 70.

The through hole 72 is provided with an oil seal 75 in a state where the feed dog drive shaft 71 penetrates, and the through hole 7 is provided in a state where the feed dog drive shaft 71 is rotatable.
2 is closed to prevent the lubricating oil from entering from the oil supply unit 60 to the shuttle peripheral portion 74 described later through the through hole 72. On the upper surface of the sewing machine frame 51 on the side of the oil supply section 60, a conventional oil viewing window 76 made of a transparent member is formed.

Further, the oil supply section 60 of the sewing machine frame 51
A pressure adjusting valve 77 is provided on the upper surface on the side. The pressure regulating valve 77 is basically a hole that communicates the inside of the oil supply unit 60 of the sewing machine frame 51 with the outside of the sewing machine frame 51, and the pressure inside the oil supply unit 60 in a sealed state as described later is If the temperature rises due to the temperature rise,
It is for letting out the air inside. The pressure regulating valve 77 is basically a hole for air release as described above, and is not provided with a normal valve mechanism. However, a normal valve mechanism is provided, and When the inside of the fuel tank 60 reaches a predetermined pressure, the air in the fueling part 60 may be evacuated.

The oil pan 52 has a cylindrical side wall 77.
And a bottom portion 78 and a container shape whose upper surface is open. The side wall portion 77 and the connection portion 68 below the sewing machine frame 51 have a shape overlapping each other, and when the side wall portion 77 and the connection portion 68 are connected, the sewing machine frame 5
In a state where the inside of the rear portion 59 and the inside of the oil pan 52 are in communication with each other, a space in which these are combined is sealed. The side wall 77 of the oil pan 52 and the connection 68 of the sewing machine frame 51 are connected to each other. For example, in this example, the side wall 77 and the connection 6
8 is concluded.

Incidentally, as shown in FIG.
Connecting portion 6 between upper end surface of side wall portion 77 and sewing machine frame 51
8 between the lower end face and the packing 7 for preventing oil leakage.
9 are arranged, and a ridge 80 is formed on the upper end surface of the side wall 77 along the side wall 77. When the oil pan 52 and the sewing machine frame 51 are connected, the ridge 80 is formed. The seal between the oil pan 52 and the sewing machine frame 51 can be strengthened as compared with the case where the oil pan 52 sinks into the packing 79 and the upper end surface of the side wall portion 77 is flat, thereby preventing oil leakage.

In a state where the side wall 77 of the oil pan 52 and the connecting part 68 of the sewing machine frame 51 are connected, the inside of the oil pan 52 and the inside of the rear part 59 of the sewing machine frame 51 become the above-mentioned oil supply part 60 integrally. . Further, the oil pan 52 is arranged below the rear portion 59 of the sewing machine frame 51 in a state where the side wall portion 77 of the oil pan 52 and the connecting portion 68 of the sewing machine frame 51 are connected,
A peripheral portion of a hook 81 and a feed dog (to be described later) disposed on the tip side of the bed 53 (a hook peripheral portion 74) are the oil pan 52 described above.
The outer side of the refueling section 60 is formed by the inside and the inside of the rear portion 55 of the sewing machine frame 51.

Further, since the refueling unit 60 is sealed as described above (except for the pressure regulating valve), the refueling unit 60 and the shuttle peripheral portion 74 outside the refueling unit 60 are separated from each other. , In a completely shielded state. That is, the connection part 68 of the sewing machine frame 51 and the connection part 77 of the oil pan 52 are a shielding part that shields the oil supply part 60 and the shuttle peripheral part 74. Further, since the oil pan 52 is connected to the sewing machine frame 51 and is in a substantially sealed state as described above, the oil pan 52 is connected to the sewing machine frame 51 to form an oil pot. The oil pan 5
An oil amount confirmation window 82 made of a transparent member is formed on the side wall of the second member. Further, inside the oil pan 52, a pump 84 that breaks the oil in the oil pan 52 and feeds the oil into the upper shaft 62 via the illustrated tube 83 is arranged.

As shown in FIG. 1, the mechanical components of the sewing machine are basically the same as those of the conventional sewing machine. The mechanical components of the sewing machine include, for example, a needle (not shown) arranged in the face portion 58. A mechanical component for driving the rod, the balance, and the press; an upper shaft 62 that is connected to a pulley 85 to which rotation of a motor (not shown) is transmitted and rotates and transmits driving force to the needle bar and the balance; A transmission shaft 88 to which the rotational force of the upper shaft 62 is transmitted via gears 86 and 87, and a lower shaft 69 for transmitting the rotational force of the transmission shaft 88 via lower bevel gears 89 and 90 and rotating the shuttle 81. And a press-up mechanism (not shown) that raises a press (not shown) as shown in the above-described conventional example, and a rotational force of the upper shaft 62 transmits the transmission mechanism 91 as shown in FIG. And the feed dog ( There are a feed dog drive shaft 71 for transmitting the driving force to the feed dog mechanism (not shown) for driving the 示略). Needless to say, the sewing machine B has a needle bar (not shown), a balance (not shown), a holder (not shown), a shuttle 81, a feed dog (not shown), and the like.

The mechanical components for driving the needle bar, the balance, and the press in the surface portion 58 are well-known oil-free components. The upper shaft 62 is disposed on both the oil supply unit 60 side and the tip end 57 side having the surface 58 of the sewing machine frame 51 while penetrating the shielding wall 61.
The portion on the side of the refueling section 60 is a mechanical part in the refueling section 60 that needs to refuel the bearing or the like, and the portion of the upper shaft 62 on the tip end 57 side of the sewing machine frame 51 needs to refuel the bearing or the like. It is a mechanical component in the leading end portion 57 of the non-lubricated sewing machine frame 51. The upper shaft 62 is used to transmit power from the oil supply unit 60 side to the surface unit 58 side.
It is a connecting member for connecting the mechanical components on the 7 side.

The periphery of the portion of the upper shaft 62 penetrating the shielding portion 61 is sealed by the oil seal 66 as described above. In addition, the lubrication part 6 of the upper shaft 62
A space (not shown) for oil supply is formed inside the 0-side portion, and a hole 92 communicating with the space is formed at the rear end of the upper shaft 62 to scatter oil. .

The bevel gears 86 and 87, the transmission shaft 8
The lower bevel gear 8 and the lower bevel gears 89 and 90 are mechanical components that need to be refueled and are disposed in the refueling unit 60. The lower shaft 69 drives the shuttle 81, and is connected to the shuttle 81 disposed below the tip of the bed 53. The lower shaft 69 is provided with the oil-free shuttle 6 from the refueling section 60 side.
In order to drive the hook 81 to the hook peripheral portion 74 in which the feed dog (not shown) and the feed dog driving mechanism (not shown) are arranged, the oil is supplied while penetrating the connecting portion 68 of the sewing machine frame 51. The portion of the lower shaft 69 on the oil supply unit 60 side is a mechanical component in the oil supply unit 60 that requires oil supply to a bearing or the like.
The portion on the shuttle peripheral portion 74 side is a mechanism component in the oil-free shuttle peripheral portion 74 that does not require oiling of a bearing or the like.

The lower shaft 69 is a connecting member for connecting the mechanical parts on the fueling part 60 side and the mechanical parts on the hook peripheral part 74 side in order to transmit power from the fueling part 60 side to the shuttle peripheral part 74 side. It has become. The periphery of the portion of the lower shaft 69 that penetrates the connecting portion 68 is sealed by the oil seal 73 as described above.

The press-up mechanism has basically the same function as the conventional one, but the horizontal axis 63 corresponding to the knee upper horizontal axis 35 shown in FIG. A connecting portion 93 penetrating the shielding wall 61; and a refueling portion side shaft 9 connected to an end of the connecting portion 93 on the refueling portion 60 side.
4 and a surface-side shaft 95 connected to an end of the connection portion 93 on the surface 58 side. The connecting portion 93 is connected to the refueling portion side shaft 94 and the surface portion side shaft 95 so as to be swingable or vertically movable with play, and the refueling portion side shaft 94 and the surface portion side shaft are connected. Even if 95 moves up and down when moving back and forth, the connecting portion 93
It moves almost back and forth.

The horizontal shaft 63 of the press-up mechanism is a mechanism part of the refueling unit 60 in which the refueling side shaft 94 needs refueling, and the face part side shaft 95 has the tip end 57 of the sewing machine frame 51 which does not require refueling. Mechanical components. The parts of the press-up mechanism (not shown) connected to the refueling unit side shaft 94 are the mechanical parts of the refueling unit 60 that requires refueling. It is a mechanical component of the leading end 57 of the sewing machine frame 51 that does not require refueling. And the horizontal axis 63
The connecting portion 93 is a connecting member for connecting the mechanical component on the refueling portion 60 side and the mechanical component on the surface portion 58 side.

The feed dog drive shaft 71 shown in FIG. 2 transmits power to a feed dog mechanism for driving a feed dog (not shown), and is connected to the feed dog drive mechanism. And
The feed dog drive shaft 71 is used to drive the feed dog from the refueling unit 60 side to the hook peripheral part 74 so as to drive the feed frame 5.
In a state penetrating through the first connection portion 68, it is disposed on both the oil supply portion 60 side and the hook peripheral portion 74 side, and the portion of the feed dog drive shaft 71 on the oil supply portion 60 side needs oil supply to a bearing or the like. A part of the feed dog drive shaft 71 on the shuttle peripheral part 74 side is a mechanical part in the oil supply unit 60, and is a mechanical part in the oil-free shuttle peripheral part 74 which does not require oil supply to a bearing or the like. Further, the feed dog drive shaft 71 is moved from the refueling section 60 side to the hook peripheral section 7.
In order to transmit power to the side 4, it is a connecting member for connecting the mechanical part on the refueling part 60 side and the mechanical part on the hook peripheral part 74 side. The periphery of the portion of the feed dog drive shaft 71 that penetrates the connecting portion 68 is sealed by the oil seal 75 as described above.

Next, the operation of the sewing machine B of the present invention will be described. The oil accumulated in the oil pot (oil pan 52) of the oil supply unit 60 of the sewing machine frame 51 due to the operation of the sewing machine B is pumped by the pump 84 via the tube 83 to the upper shaft 62.
Oil is fed inside. Then, the oil fed into the upper shaft 62 is forcibly supplied to the middle metal 96 and the rear metal 97 serving as bearings of the upper shaft 62. And the oil inside the upper shaft 62 is
Scattered outside through a hole 92 provided at the rear end of the upper shaft 62,
The lubrication state can be visually checked by covering the transparent oil viewing window 76. On the other hand, the oil is scattered from the hole 92 of the upper shaft 62 to supply oil to the mechanical components in the oil supply unit 60, for example, the upper bevel gears 86 and 87 and the lower bevel gears 89 and 90.

On the other hand, oil supply from the inside of the upper shaft 62 is
This is performed only in the portion inside the refueling portion 60, and the portion of the upper shaft 62 on the tip end portion 57 side of the sewing machine frame 51 is not refueled. Further, the mechanical components on the side of the surface portion 58 are oil-free. Further, the oil scattered in the oil supply section 60 is blocked by the shielding wall 61 so as not to enter the surface section 58 side.

The upper shaft 62 and the horizontal shaft 63 of the holding-up mechanism penetrate the shielding wall 61. Since this portion is closed by the oil seals 66 and 67, the through holes 64 and 65 are provided. Can be prevented from penetrating into the surface portion 58 side, or from entering the surface portion 58 side along the upper shaft 62 and the horizontal shaft 63. Further, a sewing machine frame 51 and an oil pan 52 are combined to form an oil supply section 60 having a sealed oil pot, and an oil-free hook 81, a feed dog, and a feed hook in which a feed dog driving mechanism are arranged. Since the peripheral portion 74 is outside the refueling portion 60, the refueling portion 6
The oil scattered inside 0 does not enter the hook peripheral portion 74 side.

The lower shaft 69 and the feed dog drive shaft 71 penetrate the connecting portion 68 of the oil supply unit 60.
Since this portion is closed by the oil seals 73 and 75, the oil penetrates into the hook peripheral portion 74 through the through holes 70 and 72, and the oil travels along the lower shaft 69 and the feed dog drive shaft 71 to allow the oil to move around the hook peripheral portion. It is possible to prevent intrusion into the 74 side.
The oil is sealed in the oil supply section 60, but since the pressure regulating valve 77 is provided in a portion of the sewing machine frame 51 corresponding to the oil supply section 60, the oil in the oil supply section 60 is increased due to a temperature rise. Pressure increases, the oil seals 66, 6
It is possible to prevent oil from leaking from portions 7, 73 and 75 due to pressure. From the above, upper thread, lower thread,
Oil can be prevented from adhering to the mechanical parts of the surface part 58 and the mechanical part of the hook peripheral part 74 to which the sewn material may come in contact, and the upper thread, the lower thread and the sewn material can be prevented from becoming oily. It can be reliably prevented.

Further, since the mechanical components in the oil supply section 60 operate in a state where oil is supplied as in the related art, the reliability of the sewing machine B can be maintained as in the related art. Further, since the oil pan 52 is coupled to the lower portion of the sewing machine frame 51, the sewing machine frame 51 is tilted or the sewing machine frame 51 is lifted during maintenance or adjustment of the shuttle 81, the feed dog, the thread cutting device (not shown), and the like. Even oil pan 52
The exposed oil can be prevented from being exposed, and the exposed oil can be prevented from leaking to the surroundings, and the surrounding oil can be prevented from coming into contact with the exposed oil.

Further, since the oil pan 52 is connected to the lower portion of the sewing machine frame 51, when replacing the sewing machine B on the sewing machine base, the oil pan 52 is removed after the sewing machine B (the sewing machine frame 51) is removed. Bread 5
There is no need to dispose of the oil in 2 and the sewing machine B can be removed together with the oil pan 52,
Since the oil in the oil pan 52 is in a sealed state, the sewing machine B can be stored without disposing of the oil.
The replacement of the sewing machine B can be facilitated.

[0055]

According to the sewing machine of the first aspect of the present invention, a shielding portion is provided between the face portion and the oil supply portion, and the gap of the through hole through which the connecting member of the shielding portion passes is a sealing member. As a result, it is possible to prevent the lubricating oil from entering the surface from the oil supply unit. And
By eliminating the need for lubrication of mechanical parts in the surface and preventing oil from entering the surface from the lubrication part, the mechanical parts in the surface do not cause the upper thread or sewing material to be contaminated with oil.
Oil stains on the upper thread and the sewing product can be reliably prevented.

That is, even if the mechanical parts in the surface are not lubricated, the upper thread and the sewn material may be contaminated with oil due to the oil entering the surface from the oil supply unit. By preventing oil from entering the surface, oil stains can be reliably prevented. In addition, lubrication is performed on the mechanical components in the lubrication unit, and the reliability of the sewing machine can be maintained.

According to the sewing machine of the second aspect of the present invention,
Since a shielding portion is provided between the periphery of the shuttle and the refueling portion, and a gap between the through holes through which the connection member of the shielding portion passes is closed by a seal member, the refueling having an oil pan in the periphery of the shuttle It is possible to prevent the lubricating oil from entering from the portion. By eliminating the need for lubrication of the hook and feed dog, and preventing oil from entering the periphery of the hook from the lubrication unit, the hook and feed dog do not cause the lower thread or sewing material to become dirty with oil. Oil stains on the lower thread and the sewing product can be reliably prevented.

That is, even if the shuttle and the feed dog are not lubricated,
There is a possibility that the lower thread and the sewn product will be contaminated with oil due to the oil entering the periphery of the hook from the oil supply unit.However, by preventing the oil from entering the periphery of the hook with the above-mentioned shield portion and the seal member, Oil stains can be reliably prevented. In addition, lubrication is performed on the mechanical components in the lubrication unit, and the reliability of the sewing machine can be maintained.

According to the sewing machine of the third aspect of the present invention,
Oil stains on the upper thread and the sewn product can be reliably prevented as in the case of the configuration of the above-described claim 1, and the lower thread and the sewn product can be similarly removed as in the configuration of the above-described claim 2. Oil stains can be reliably prevented. That is, it is possible to reliably prevent the sewing product from being stained with the lubricating oil of the sewing machine. Also, as in the case of the first and second aspects, the lubrication is performed for the mechanical components in the lubrication unit,
The reliability of the sewing machine can be maintained.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a sewing machine according to an example of an embodiment of the present invention.

FIG. 2 is a sectional view showing the sewing machine of the above example.

FIG. 3 is a cross-sectional view of a main part showing a coupling portion between a sewing machine frame and an oil pan of the sewing machine of the above example.

FIG. 4 is a sectional view showing a conventional sewing machine.

FIG. 5 is a sectional view showing a conventional sewing machine.

FIG. 6 is a sectional view showing a conventional sewing machine.

[Explanation of symbols]

52 oil pan 58 face part 60 oil supply part 61 shielding wall (shielding part, first shielding part) 62 upper shaft (connecting member, first connecting member) 64 through-hole (first through-hole) 65 through-hole (first) 66 Oil seal (seal member, first seal member) 67 Oil seal (seal member, first seal member) 68 Connection portion (shielding portion, second shielding portion) 69 Lower shaft (connection member, Second connecting member) 70 Through hole (second through hole) 71 Feed dog drive shaft (connecting member, second connecting member) 72 Through hole (second through hole) 73 Oil seal (seal member, second) 74 Hook peripheral portion 75 Oil seal (seal member, second seal member) 77 Side wall portion (shielding portion, second shielding portion) 81 Hook 93 Connecting portion (connecting member, first connecting member)

Claims (3)

[Claims] An oil-free mechanism component for driving a needle bar, a balance, a presser, and the like is provided, and a lubrication unit is provided with a lubrication mechanism component. A shielding portion for shielding the surface portion and the oil supply portion is provided, and a through-hole is provided in the shield portion, through which a connecting member for connecting the mechanical component of the surface portion and the mechanical component of the oil supply portion passes. ,
A sewing machine, wherein a gap around the connecting member in the through hole is closed by a seal member. 2. An oil supply section in which a mechanism component to be refueled and an oil pan for supplying oil to the mechanism component are provided, and a hook peripheral portion in which an oil-free hook and a feed dog are arranged, are provided. A shield is provided between the refueling part and the hook peripheral part for shielding the refueling part and the shuttle peripheral part, and a connection for connecting the mechanical part to be refueled, the shuttle and the feed dog to the shield part. A sewing machine, wherein a through hole through which a member penetrates is provided, and a gap around the connecting member in the through hole is closed by a seal member. 3. An oil supply unit in which a mechanism component to be refueled and an oil pan for supplying oil to the mechanism component are disposed, and a non-lubrication mechanism component for driving a needle bar, a balance, a presser, and the like is disposed. A surface portion and a hook peripheral portion where an oilless hook and a feed dog are arranged are provided, and a first shielding portion that shields the surface portion and the oiling portion is provided between the surface portion and the oiling portion. A second shielding portion is provided between the refueling portion and the hook peripheral portion for shielding the refueling portion and the hook peripheral portion, and the first shielding portion is provided with the mechanical component of the surface portion and the oil supply. A first through-hole is provided through which a first connecting member that connects the mechanical components of the first part penetrates, and a gap around the first connecting member in the first through-hole is closed by a first seal member. The mechanism part to be refueled to the second shielding part, the shuttle and the feed dog A second through-hole through which the second connecting member to be connected penetrates is provided, and a gap around the second connecting member in the second through-hole is closed by the second seal member. Sewing machine.