JPS5927278Y2 - double row sewing machine - Google Patents

Description

[Detailed description of the invention] This invention is a sewing machine that has a double-row needle bar and creates double-row stitches by changing the needle bar spacing or the needle spacing as necessary, and in particular, its lid mechanism. The present invention relates to the configuration of a support portion for a drive gear provided in the present invention.

When changing the position of the needle in such a sewing machine, it is also necessary to change the position of the lid mechanism.

The housing and lid mechanism are horizontal full-rotation hooks, so the drive shaft that drives the horizontal full-rotation hook and the gear that interlocks the shaft of the horizontal full-rotation hook are spiral gears. The sewing machine is connected to the upper shaft above the sewing machine, and the needle and horizontal full-rotation hook must be accurately synchronized.However, in the past, the drive gear of each lid mechanism was fixed to the drive shaft with a fixing bolt. When the lid mechanism is moved, the gear fixing bolt must be loosened, moved on the drive shaft, and then fixed again, so the timing must be adjusted at this time.

Therefore, there was a problem in that it was very time-consuming.

To this end, the drive gear of each lid mechanism is mounted so that it can freely slide only in the axial direction with respect to the drive shaft via a slide key, and each drive gear is mounted axially with respect to the main body of each lid mechanism. must be immovable.

However, since the wall thickness of the drive gear is not usually large, if the drive shaft is fitted directly into the shaft hole provided in the drive gear, it may twist at the fitting part when the drive gear moves, making it difficult to move smoothly. The problem arises that there is no.

This invention aims to solve the above problems.

That is, this invention arranges sliding tubes that slidably fit on the drive shaft on opposite sides of each main body of each lid mechanism, and rotates each sliding tube with the drive shaft using a slide key. Each of the drive gears is fixed to the outside of each of the sliding tubes, and each of the sliding tubes protrudes from the opposing end surfaces of each of the drive gears, and a receiving member is fixed to each of the main bodies. is integrally provided with an annular receiving part into which the sliding tube protruding from each drive gear is rotatably fitted, and each driving gear is fitted between each receiving part and each main body so as not to be able to move in the axial direction. It is something.

Embodiments of the double-row sewing machine of this invention will be described in detail below with reference to the accompanying drawings.

In the figure, reference numeral 1 denotes a bed of a sewing machine, and a horizontal drive shaft 2 is attached to the lower part of the bed so as to be rotatable but not movable in the axial direction.

A is a lid mechanism, and in the illustrated example, two sets of lid mechanisms A are used.

3 is a main body of each lid mechanism A, and a bearing 4 provided in each main body 3
A drive shaft 2 is rotatably and slidably fitted in the drive shaft 2 .

A circular recess 5 concentric with the drive shaft 2 is formed in the side of each main body 3, and a drive gear 6 is fitted into the recess 5.

As shown in Fig. 4, this gear 6 is fixed to the outside of a sliding tube 6' which has an inner shaft hole 7 slidably fitted to the outside of the drive shaft 2. The side facing the drive gear 6 protrudes longer than the end face of the drive gear 6.

This twisted sliding tube 6' may be formed integrally with the drive gear 6.

Additionally, a slide key 8 is fixed in each shaft hole 7, and the key 8 is slidably fitted into a long key groove 9 provided in the drive shaft 2.

Reference numeral 10 denotes a receiving member fixed onto each main body 3 with bolts 11, and a gear 6 is inserted into the annular receiving part 12 at the end thereof as shown in FIG.
A sliding tube 6' protruding from the recess 5 is rotatably fitted into the sliding tube 6', and receives the side surface of the gear 6 at the receiving part 12, and is connected to the other side surface of the gear 6 and the recess 5.
The gear 6 is mounted on the bottom of the main body 3 with the spacing adjustment ring 13 in between.
Avoid moving in the axial direction relative to the

However, depending on the case, the ring 13 may be omitted, or a ring may also be sandwiched between the gear 6 and the receiving portion 12.

14 is a horizontal recess provided on the side of the main body 3;
is familiar with

In this recess 14, a snow gear 16 fixed to a vertical shaft 15, which is rotatably fitted into a vertical shaft hole provided in the main body 3 but cannot be raised or lowered, is positioned, and this gear 16 is connected to the drive gear 6. mesh.

A horizontal full-rotation hook 17 is fixed to the upper end of the shaft 15, and a bobbin case 18 with an open top is fitted inside the hook.

The above-mentioned bobbin case 18 needs to be prevented from rotating as is well known, and an arm 20 with a retaining piece 19 for preventing rotation is rotatably attached to the main body 3 via a shaft 21 and fixed to the shaft 15. The arm 20 is swung by a slight angle by a cam (not shown), allowing the bobbin case 18 to rotate slightly while being prevented from rotating, thereby facilitating thread removal.

Reference numeral 23 denotes a vertical feed cam attached to the drive shaft 2. When the inner end of the fixing screw 22 screwed into the cam 23 is engaged with the key groove 9 and the fixing screw 22 is loosened, the cam 23 moves left and right. When the fixing screw 22 is tightened, the cam 23 is fixed to the drive shaft 2.

Reference numeral 24 in FIGS. 1 and 2 is a feed dog, which performs a cloth feeding action in conjunction with the drive shaft 2 by an interlocking mechanism and a cam 23 (not shown).

Reference numeral 25 denotes a pair of left and right needle bars, and the distance between the needles 26 is determined by various mechanisms such as a mechanism that moves a needle bar support frame left and right (not shown) or a mechanism that changes the distance between the needles 26 at the lower end of the needle bar 25.
The interval between is variable.

Further, at one end of each main body 3 there is a projecting piece 28 having a long hole 27 in the left-right direction. The main body 3 is fixed to the bed 1 by screwing into the screw hole of the receiving part 29 and tightening it.

This device has the above-mentioned structure, and when the distance between the needles 26 is changed, the distance between the lid mechanism A is changed by loosening the bolt 30 and moving the left and right main bodies 3, and the position of the needle 26 and the lid mechanism A is changed. After matching accurately, each bolt 30 is tightened to fix the main body 3 to the receiving part 29.

In the case of this invention, when loosening the bolt 30 and moving the main body 3 as described above, each gear 6 moves together with the main body 3,
No matter what position the main body 3 is in, the positional relationship between the gear 6 and the drive shaft 2 and the positional relationship between the gear 16 on the vertical shaft 15 and the gear 6 do not change at all.

Therefore, in this invention, when the position of the needle 26 is changed, only the position of the main body 3 is changed accordingly, and the labor-intensive work such as adjusting the tying of the hook 17 in response to the vertical movement of the needle bar 25 is initially eliminated. It has the advantage that it is completely unnecessary except when assembling the needle, making it extremely easy to change the needle.In particular, in the case of this invention, each sliding tube that is slidably fitted to the drive shaft is rotated together with the drive shaft using a slide key. Each of the drive gears is fixed to the outside of each of the sliding tubes, and each of the sliding tubes protrudes from the opposing end surfaces of each of the drive gears, and a receiving member is fixed to each of the main bodies. is integrally provided with an annular receiving part into which the sliding tube protruding from each drive gear is rotatably fitted, and each driving gear is fitted between each receiving part and each main body so as not to be able to move in the axial direction. Therefore, when the drive gear moves, the long sliding tube that is integrated with the drive gear moves along the drive shaft together with the gear, so that no twisting occurs during the movement.

Therefore, there is a unique effect that the work of changing the needle can be carried out extremely smoothly.

[Brief explanation of drawings]

Figure 1 is a front view showing the main parts of a double-row sewing machine using the device of this invention, Figure 2 is a plan view of the same, Figure 3 is a side view of the same, and Figure 4 is a front view of the same. It is. 2... Drive shaft, 3... Body, 6...
...Drive gear, 6'...Sliding tube, 8...
...Slide key 9...Keyway, 10...
...Receiving member, 12...Receiving part, 15...
・Vertical shaft, 16...Spiral gear, 17・
...Horizontal full rotation hook, A...Hook mechanism.

Claims (1)

[Scope of utility model registration request] It has a plurality of needle bars, and the spacing between the needles and the spacing between the plural sets of horizontal fully rotary hook mechanism lid mechanisms at the bottom of the bed can be freely changed. A drive gear that meshes with a gear fixed to the horizontal full-rotation hook of each lid mechanism is slidably fitted, and each drive gear and drive shaft are engaged with a slide key so that they rotate together. In a double row sewing machine in which a gear is configured to move together with each lid mechanism, sliding cylinders that are slidably fitted to a drive shaft are arranged on opposite sides of each main body of each lid mechanism, and Each of the sliding cylinders is configured to rotate together with the drive shaft by a slide key, and each of the driving gears is fixed to the outside of each of the sliding cylinders, and each sliding cylinder is connected from the opposite end surface of each of the driving gears. The receiving member, which is fixed to each main body, is integrally provided with an annular receiving part into which a sliding tube protruding from each drive gear is rotatably fitted, and between each receiving part and each main body. A double-row sewing machine in which each drive gear is fitted so that it cannot move in the axial direction.