JPS5913988Y2 - Throat plate adjustment device for zigzag sewing machine - Google Patents

Description

[Detailed description of the invention] This invention relates to a needle drop position adjustment device for a throat plate in a zigzag sewing machine, and includes a needle attached to the tip of a needle bar that reciprocates up and down a throat plate provided with an elongated hole for zigzag sewing. On the other hand, the purpose is to be able to adjustably attach the needle to an appropriate position on the bed surface, to easily obtain an appropriate needle drop position, and to simplify the structure.

An embodiment of the present invention will be described below with reference to the drawings. 1 is a bed machine frame of a sewing machine; 2 is a sliding plate; the sliding plate covers a part of the front side of the surface notch 3 of the bed machine frame 1; It is slidably mounted within the notch so that the section can be opened.

Reference numeral 4 denotes a throat plate that covers the rear of the surface notch of the bed machine frame 1, and has a feed dog notch window 5 and a zigzag needle hole 6 formed approximately in the center, and a needle hole 6 adjacent to the needle hole. A linear switching plate 7 is slidably provided, and a long hole 8 extending in the longitudinal direction of the needle drop hole 6 is formed on the right side, and a tightening screw 10 is inserted into a tightening screw hole 9 drilled on the left side. It is inserted and fixed to the bed machine frame 1.

The elongated hole 8 has a hole 1 bored in the lower bed machine frame 1.
The head portion 14 of the eccentric pin 12 having the short shaft portion 12 fitted thereinto is inserted into the driver groove.

The eccentric pin 12 is tightened with the screw 1 from the side of the bed machine frame 1.
It is fixed by 5.

A right side wall portion 16 is provided in the cutout portion 3 of the bed machine frame 1 as a horizontal mounting reference for the throat plate 4, and a hole 17 for passing the tightening screw 10 is provided in the left side flat portion. and two stepped holes 18 are provided.

Reference numeral 19 denotes a caul plate, which is provided with a screw hole 20 for fixing the caul plate and a screw hole 21 for fixing the throat plate. It is fixed by the inserted fixing screw 22 as shown in the third figure.

Therefore, the throat plate 4 is fixed to the bed machine frame 1 with the tightening screws 10 via the backing plate 19.

Since the embodiment of the present invention has the above-mentioned structure, the backing plate 19 is brought into close contact with the lower side of the bed machine frame 1 and is lightly fixed in a substantially fixed position from the upper side of the bed machine frame with the fixing screws 22.

Next, the throat plate 4 is placed on the notch of the bed machine frame 1 and brought into close contact with the mounting reference wall 16, and the eccentric pin 12 is inserted into the elongated hole 8, and the short shaft part 13 of the pin is inserted into the bed mechanism part 1. Fit it into the hole.

Next, by lowering the needle from above the bed machine frame and rotating the eccentric pin 12 to adjust the needle plate position relative to the iron nail, that is, the head 14 rotates around the short shaft portion 13.
The needle plate is moved in a direction perpendicular to the longitudinal direction of the needle drop, and the needle drop position is adjusted to obtain the optimum position for the needle.

Once the optimum position of the throat plate is determined, the pin is tightened and fixed with the screw 15.

Next, insert the tightening screw 10 into the countersink on the left side and tighten the bed machine frame 1.
It is passed through the hole 17 and screwed into the screw hole 21 of the backing plate 19 which is fixed to the bed machine frame in advance.

Even if the position of the backing plate 19 is slightly inappropriate, the tightening screw 10
By screwing in, the backing plate 19 moves relative to the bed machine frame and is adjusted to the optimum position.

Next, the throat plate 4 is removed (if a working hole is provided, there is no need to remove the throat plate), and the backing plate 19 is firmly fixed to the bed machine frame 1. It is fixed to the bed machine frame 1 while maintaining the optimum position.

Next, another embodiment of the present invention will be explained with reference to FIGS. 4 and 5. 1a is a bed machine frame, 2a is a sliding plate, 3a is a notch, 4a is a throat plate, and 5a is a feed dog notch window. , 6a is the needle hole for zigzag, 7a is the straight line switching plate, 9a is the hole for the needle plate tightening screw, 10a is the tightening screw, 16a is the right side wall inside the notch of the bed machine frame, which is the reference for attaching the throat plate. , 17 a is a blank hole for passing through a tightening screw on the inner plane part of the notch, 18 a is a stepped hole in the same plane part, 19 a is a backing plate, 20 a is a screw hole for fixing the corresponding plate, 21 a is a throat plate 22a is a fixing screw hole, 22a is a base tightening screw, 23a is an elongated hole provided in a notch of the bed machine frame which is long in the longitudinal direction of the needle hole, and 24a is an eccentric head 25a. An eccentric pin consisting of a short shaft portion 26a, 27a is a patch hole into which the short shaft portion 26a of the eccentric pin is fitted, and 28a is a hole drilled for operating the eccentric pin 24a. This is a cover that covers the hole in the needle plate.

Since the second embodiment of the present invention has the above-mentioned structure, the backing plate 19a is brought into close contact with the bed machine frame 1a from the bottom side, as in the previous embodiment, and the fixing screws 20a are screwed into the bed machine frame 1a from the top to set it in place in advance. Fix it lightly, then insert the eccentric pin 24a into the elongated hole 2.
1a into the hole 27a of the backing plate 19a.

Next, the throat plate 4a is placed on the notch 3a of the bed machine frame 1a, and the end edge is brought into close contact with the mounting reference wall 16a, and the hole 2 of the throat plate is
Rotate the eccentric pin 24a to adjust the most extreme position of the needle hole relative to the needle.

When the optimum needle drop position of the throat plate has been obtained, place a working screwdriver in front of you and firmly tighten the tightening screw 22a to fix the backing plate 19a so that it does not move relative to the bed machine frame 1a, and finally remove the throat plate 4a. The installation of the throat plate accompanied by position adjustment is completed by fixing it to the bed machine frame 1a via the patch plate 19a with the screws 10a, and the eccentric pin 24 bored in the throat plate 4a
Fit the lid 28a into the screwdriver hole for adjustment a.

Still another embodiment will be explained with reference to FIG. 6. 1b is a bed machine frame, 2b is a sliding plate, 3b is a notch on the bed frame, 4
b is a throat plate, 5b is a feed dog notch window provided approximately in the center of the throat plate, 6b is a zigzag needle hole, and 7b is a slidable straight line switching piece provided adjacent to the needle hole. , 8b is an elongated hole extending in the longitudinal direction of the needle hole 6b, 9b is a fixing hole drilled in the needle plate, 10b is a needle root tightening screw, 11b is a hole drilled in the bed machine frame, 12b is an eccentric pin provided with a short shaft portion 13b and an eccentric head 14b forming a driver groove; 15b is a tightening screw for fixing the eccentric pin to the bed; 16b is a screw for attaching the needle plate in the bed notch Standard side wall, 2
Reference numeral 9b denotes a screw hole provided in the flat surface of the notch, into which the tightening screw 10b is screwed.

In this third embodiment, the hole 9b of the needle plate into which the tightening screw 10b is inserted is provided with a stepped portion, and furthermore, a long elongated hole is bored in a direction perpendicular to the longitudinal direction of the needle hole 6b. .

Since the third embodiment of the present invention has the above-described structure, the throat plate 4b is placed in the notch 3b of the bed machine frame and lightly fixed with the tightening screw 10b so that it can be moved slightly. The needle droplet is moved in a direction perpendicular to the longitudinal direction of the needle droplet by rotation of the eccentric pin 12b fitted in the elongated hole while being brought into close contact with the reference wall 16b, and the needle droplet position is adjusted to determine the optimum position. Fix the eccentric pin 11b with the double tightening screw 15b, and finally tighten the tightening screw 10b to fix the throat plate 4b to the bed machine frame 1b.

Since the present invention has the structure and function as described above, it is extremely easy to adjust and determine the optimal needle drop position of the throat plate, which replaces the conventional fixing example, which required a high degree of skill to fix the screws. It is an industrially and practically useful idea, as it is extremely effective compared to the above, and has a simple structure, so it can be provided at a low cost.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and Figures 1 to 3 are the first embodiment.
1 is a perspective view, FIG. 2 is a developed view, and FIG. 3 is a sectional view of a main part, and FIGS. 4 and 5 show a second embodiment. Figure 4 is a developed view, Figure 5
The figure is a sectional view of the main part, and FIG. 6 is a developed view of the third embodiment. In the figure, 1. la, lb are bed machine frames, 3, 3a. 3b is a notch, 4, 4a, 4b is a throat plate, and 6, 6a. 6b is an elongated needle drop hole, 9, 9a, 9b are holes for tightening screws, 8.8
a and 8b are long holes for adjustment, 12.12a and 12b are eccentric pins, and 16.16a and 16b are side walls of the notch.

Claims (1)

[Scope of utility model registration request] A bed machine frame provided with a notch and a throat plate are placed and fixed so as to cover the notch, and the throat plate has holes for tightening screws fixed to the bed and upper and lower holes with an appropriate swing width. A needle plate for a zigzag sewing machine is provided with a long needle drop hole for zigzag through which a moving needle passes, a side wall that closely contacts a side surface of the throat plate to the bed machine frame and serves as a reference for a fixed position;
The throat plate has an elongated hole for adjusting the needle drop at a position parallel to the swing width direction of the elongated needle drop hole in the rear portion on the opposite side from the hole for the tightening screw, and a needle drop adjustment elongated hole that is fitted into the elongated adjustment hole and has an upper and lower An eccentric pin for adjusting the optimal position of the throat plate with respect to the moving needle, a screw for fixing the pin after adjustment, and a patch plate for fixing the throat plate at the optimal position with respect to the sewing machine frame are provided. A throat plate adjustment device for a zigzag sewing machine featuring: