JPS6124039B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a cylinder sewing machine.

Most conventional cylinder sewing machines have a small diameter and long cylinder extending from the base of the arm to the needle drop side.In these cylinder sewing machines, the entire cylinder has a small diameter. Since there is not enough space in the cylinder, the looper, cloth feeding mechanism, etc. necessary for sewing can only be accommodated in this cylinder, and a knife mechanism, etc. is provided to cut the upper thread and bobbin thread when sewing is completed. Furthermore, even when a bobbin thread regulator is provided to supply a fixed amount of bobbin thread to the looper, there are significant restrictions on its size and shape.

The present invention has been made in view of the above circumstances, and its purpose is to actively make the cylinder part that forms the sewing part thinner, and even if the cylinder part is made thinner, the female mechanism and bobbin thread adjustment are not required. To provide a cylinder sewing machine that can easily accommodate a container, etc.

In order to achieve this object, the cylinder sewing machine of the present invention is characterized by having the following configuration.

That is, on one side of the needle drop side of the base of the approximately square-shaped arm, there is provided a storage section with an opening on the top surface for accommodating the drive part of the knife mechanism, the bobbin thread adjuster, etc.; A cylinder part is connected to one side of the needle drop part, and a knife body part of the knife mechanism for catching and cutting the upper thread and bobbin thread is disposed within the cylinder part, and a driving part of the knife mechanism is disposed within the housing part. and a bobbin thread adjuster, respectively, and a window is formed in the upper surface portion of the housing portion side of the cylinder portion so that the knife main body portion of the knife mechanism is exposed. The upper surface opening of the accommodating part is closed with a cover so that it can be opened.

Hereinafter, one embodiment of the present invention will be specifically described with reference to the drawings.

FIG. 1 shows an overall schematic view of a cylinder sewing machine according to the present invention, in which 1 is a box-shaped storage part having an opening on the top surface, and one side of the needle drop part 100 side of the base of the arm 2 having an approximately square shape. It is located adjacent to the department.
3 is a screw 4 on one side of the needle drop section 100 side of the accommodation section 1.
This is an extremely thin cylindrical cylinder part that forms a sewn part that is removably connected through the cylindrical part.

By the way, inside this cylinder section 3, in addition to operating parts directly involved in sewing, that is, a looper 32 and a cloth feeding mechanism (not shown), there are also a female mechanism for catching and cutting the upper thread and lower thread when sewing is completed. 5 is housed in a state where it faces the lower part of the throat plate 6.

The knife main body 5' portion of the knife mechanism 5 is shown in FIGS.
As shown in FIG. 5, there is a sharpened thread locking/movable blade 7 formed of a spring plate material, and the upper thread and bobbin thread locked by this thread locking/movable blade 7. It has a fixed blade 8 that shears together with the thread locking and movable blade 7, so that the upper thread and the lower thread are sheared when the thread locking and movable blade 7 moves backward.

That is, the lower thread is locked to the first locking part 7a formed on one side of the thread locking and movable blade 7, and the upper thread is locked to the second locking part 7b. By moving the movable blade 7 backward, the upper thread and the lower thread are sheared by the movable blade 7 and the fixed blade 8. Further, the tip of a tongue-like presser spring 40 made of a spring plate material is brought into elastic contact with the back surface of the thread locking/movable blade 7, and the bobbin thread is sheared by the thread locking/movable blade 7 and the fixed blade 8. is sandwiched and held between the presser spring 40 and the thread locking/movable blade 7.

Further, a sloped part 41 is provided on one side of the tip end of the presser spring 40, and the needle thread locked in the second locking part 7b slides on the sloped part 41 and reaches the fixed blade 8, so that the thread locks. The upper thread sheared by the movable blade 7 and the fixed blade 8 is not held by the presser spring 40 and the movable blade 7 and is disposed above the needle plate 6. It is held by an upper thread holding device 37.

In addition, regarding the upper thread holding device 37,
The one disclosed in No. 14337 is used, and the explanation is omitted here.

By the way, the other part of the knife mechanism 5, that is, the driving part 9 of the thread locking/movable blade 7' is housed in the housing part 1.

This driving portion 9 has a groove 11 carved in the base 10.
A first slide plate 12 and a second slide plate 13 are provided which are slidably slidable in a direction intersecting the dough feeding direction, and a fixed blade 8 is attached to the tip of the first slide plate 12 with screws 14... The tip of the fixed blade 8 is disposed at the lower part of the throat plate 6.

Further, a protrusion 15 is integrally provided at the rear end of the first slide plate 12, and the protrusion 15 and the base 10
A coil spring 16 is stretched between the two to elastically shift the first slide plate 12 in the direction of the needle drop, and the protrusion 15 is brought into contact with a stopper 17 integrally provided on the base 10. The forward position of the fixed blade 8 is regulated.

On the other hand, the thread locking and movable blade 7 is fixed to the tip of the second slide plate 13, and the thread locking and movable blade 7 is normally on standby at the position shown by the two-dot chain line in FIG. The needle thread and the bobbin thread are sheared by retracting the thread to the position shown by the solid line during cutting.

Further, the thread locking and movable blade 7 is driven forward and backward by the rotation operation of a rotation lever 20 which is pivotally connected to the base 10 via a pin 19.
A long hole 21 is provided at one end, and a pin 2 protruding from the rear end of the second slide plate 13 is inserted into the long hole 21.
2 is slidably inserted.

In addition, the other end of the rotating lever 20 is connected to the link mechanism 23.
is connected to the rotating arm 25 of the rotary solenoid 24 through the rotary solenoid 24.
The rotary lever 20 is rotated by ON/OFF control.

By the way, the housing section 1 accommodates various drive mechanisms (not shown) for transmitting driving force to the looper, cloth feeding mechanism, etc., as well as a bottom for supplying a certain amount of bobbin thread to the looper. A thread regulator 25 is housed. This bobbin thread adjuster 25 is attached to a subshaft 26 as shown in FIGS. 6 and 7, and includes two parallel eccentric cams 27, 27 and a slit 28 that rotate together with the subshaft 26. has
The eccentric cams 27, 27 are rotated within the slit 28, and the eccentric cam 27, 27
By the rotation of the bobbin thread adjuster 31, a certain amount of bobbin thread is
It is pulled from the side and supplied to the looper 32.

In addition, the subshaft 26 is connected to the timing belt 33.
Driving force is transmitted from the main shaft 34 side via the main shaft 34 side.

Further, in the figure, numeral 35 is a sewing needle, and numeral 36 is a cloth presser foot.

Further, the throat plate 6 has a curved surface that curves along the outer peripheral surface of the cylinder portion 3.

Furthermore, as shown in FIG. 1, a rectangular window 3a is formed in the upper surface of the cylinder part 3 on the housing part 1 side so that the knife body 5' of the knife mechanism 5 is exposed. The upper surface openings of the portion 3a and the accommodating portion 1 are closed with a cover 50 so as to be openable. This cover 50 consists of a fixed cover 50a that is attached to the housing part 1 with fasteners (not shown) such as screws to close the rear upper surface opening of the housing part 1, and a fixed cover 50a that is attached to the lower part of the front wall 1a of the housing part 1. It is composed of a movable cover 50b that is movably attached to close the front side top opening of the housing section 1 and the window section 3a of the cylinder section 3, and when the movable cover 50b is rotated forward, it is shown in FIG. Thus, the knife main body 5' portion of the knife mechanism 5 and the lower thread adjuster 25 are exposed on the upper side. Therefore, when installing, removing, or inspecting the female body 5' portion of the female mechanism, the cylinder portion 6
Alternatively, there is no need to remove the arm 2 etc. each time, and these operations can be performed very easily and efficiently by simply opening the movable cover 20b, and the lower thread is inserted into the lower thread adjuster 25. You can also do this quickly.

In the cylinder sewing machine configured as described above, in the present invention, the driving portion 9 of the knife mechanism 5, the bobbin thread adjuster 25, etc. are housed on one side of the needle drop portion 100 side of the base of the arm 2, which has a substantially square shape. Since the accommodating part 1 is provided with an opening on the upper surface of the knife mechanism 5, the driving part 9, bobbin thread adjuster 25, etc., which make up most of the knife mechanism 5, can be easily stored and arranged without being subject to restrictions such as size or shape. can be done. For this reason, in the case of conventional cylinder sewing machines, it was impossible to equip the cylinder with a knife mechanism etc. because the cylinder part was configured to be elongated from the base of the arm, but according to the cylinder sewing machine of the present invention, it was impossible to equip it with a knife mechanism etc. This makes it possible to automate the capture and cutting of upper and lower threads, greatly improving the efficiency of sewing work.

Moreover, in the present invention, the driving portion 9 of the female mechanism 5
The cylinder part 3 is connected to one side of the needle drop part 100 side of the housing part 1 in which the knife body 5' of the knife mechanism 5 is housed, for example. Compared to the case where the drive part of the knife mechanism is housed in the base of the arm and the knife body part of the knife mechanism is housed in the tip of the cylinder part, the distance of operation transmission from the drive part to the knife body part is significantly shorter, and the knife This has the advantage that the mechanism can be effectively prevented from becoming complicated and large, and the operation can be accurately transmitted from the driving part to the scalpel body part.

Further, in the present invention, a window portion 3 is provided on the upper surface portion of the cylinder portion 3 on the housing portion 1 side so that the female body 5' portion of the female mechanism 5 housed in the cylinder portion 3 is exposed.
a, and an opening is formed on the upper surface of the housing part 1 so that the driving part 9 of the knife mechanism 5, the bobbin thread adjuster 25, etc. housed in the housing part 1 are exposed on the upper side. Since the window and the opening are closed by the cover 50 so that they can be opened, the knife main body portion of the knife mechanism 5, the drive portion 9, the bobbin thread adjuster 25, etc. are exposed to the upper side simply by opening the cover. Therefore, work such as attaching, removing, inspecting and adjusting the parts of the knife mechanism 5, and inserting the bobbin thread into the bobbin thread adjuster 25 can be done very easily and efficiently. Therefore, the knife mechanism 5, the bobbin thread adjuster 25, etc. are hidden, and the sewing operation can be carried out safely, which is a practically useful effect.

As described above, the cylinder sewing machine of the present invention exhibits remarkable effects; however, the knife mechanism 5 and the bobbin thread adjuster 25 according to the present invention are not limited to those shown in the above embodiments. Before long,
In addition, as shown in the above embodiment, the cylinder part 3 is detachably installed via screws 4, or alternatively, the cylinder part 3 is integrally formed on one side of the housing part 1 on the needle drop part 100 side. It may be something like this.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the present invention, Fig. 2 is a perspective view showing one embodiment of the present invention;
3 is a top view of the female mechanism, FIG. 4 is a side view of the female mechanism, and FIG. 5 is a thread locking and FIG. 6 is an enlarged view showing the movable blade and fixed blade; FIG. 6 is a perspective view showing the installed state of the bobbin thread adjuster of this embodiment;
The figure is an explanatory diagram of the operation of the same lower thread adjuster. 1...Accommodation part, 2...Arm, 3...Cylinder part, 3
a... Window part, 5... Female mechanism, 5'... Female body part,
9... Drive part of female mechanism, 50... Cover, 100
...Needle drop section.

Claims (1)

[Claims] 1. A housing part having an opening on the upper surface for housing the driving part of the knife mechanism, the bobbin thread adjuster, etc. is provided on one side of the base of the approximately-shaped arm on the needle drop side side, and the needle in this housing part is A cylinder part is connected to one side of the dropping part, and a knife main part of the knife mechanism that captures and cuts the upper thread and the lower thread is included in the cylinder part,
Further, a driving part of the knife mechanism and a bobbin thread adjuster are respectively housed in the accommodation part, and a window part is formed on the upper surface part of the cylinder part on the accommodation part side so that the knife main body part of the knife mechanism is exposed. A cylinder sewing machine characterized in that the window portion and the upper opening of the accommodating portion are releasably closed with a cover.