TWM611866U - Cutting device of sewing machine - Google Patents

Abstract

A cutting device for a sewing machine includes: a body with a guide hole recessed at the front end, and a through hole axially provided at the bottom end of the guide hole; an actuating element fixed on a fixed object, the actuation The element contains an actuating rod connected to the body to move the body in conjunction; a knife seat, axially protruding with a guide shaft, so that the guide shaft penetrates the guide hole in an anastomosing manner to guide the knife seat along the The guide cavity is axially displaced, and an accommodating cavity is recessed axially at the end of the guide shaft, and a shaft hole penetrates through the bottom end of the accommodating cavity; a spring is placed in the accommodating cavity of the tool holder Between the bottom end of the guide hole and the main body, the tool holder is usually pushed outward elastically; an adjusting rod, the rear end of which forms a screw section, the rear end of the adjusting rod penetrates through the shaft hole of the tool holder through the main body After the through hole penetrates outwards, at least one adjusting nut is screwed together, and a blade is locked to the front end of the knife holder. If the main body is actuated by the actuating element, the blade is linked to cut the work object located below.

Description

Cutting device of sewing machine

This new model relates to a cutting device of a sewing machine.

Cutting devices currently used in sewing machines, such as Taiwan Invention Patent Application No. 104118245 "Fine-adjustment and touch self-adjusting punching structure for parallel sewing machines", the above-mentioned parallel sewing machine has at least one for carrying two pieces The sewing platform on which the fabric is sewn, an extension corresponding to the fixing seat above the sewing platform, and an automatic cutting device fixed on the fixing seat; the automatic cutting device includes an action rod underneath The electric driver is fixed to the end of the action rod and driven by the fine adjustment and touch self-adjusting punching structure. It is characterized in that: the punching structure is provided with an adjusting seat body, the adjusting seat body is provided with a displacement guide groove, a tool seat that can be moved and displaced by the displacement guide groove, and a tool seat connected to the tool seat and A hand-adjustable connecting rod for adjusting the knife holder to a proper position relative to the adjustment seat body, and an elastic top member for returning the knife seat after moving, wherein the knife holder is fixedly provided with a knife corresponding to the positioning Corresponding to the punching knife, there is a cutting edge under the punching knife that forms an included angle with the sewing platform, and the lowermost edge of the cutting edge has a leading angle.

In the above-mentioned structure, the elastic top member is passed through the periphery of the hand-adjustable connecting rod and is exposed at the rear end of the knife holder to reduce the length of the knife holder extending into the displacement guide groove, and the elastic top member There is a huge gap between the workpiece and the adjusting seat body, which causes the tool seat to still shake, which is unfavorable for the cutting operation.

In addition, in the prior art of the patent, since there is usually a gap between the guide rail and the guide block of the action rod, since the guide rail used to guide the action rod is very close to the action rod, this gap will provide the action rod to generate more The large angle shift makes the punching knife unable to perform punching accurately, and there is a need for improvement.

In view of this, the creator of the new model of this case added research and innovation, and finally revealed the cutting device of the sewing machine shown in this new model.

The object of the present invention is to provide a cutting device for a sewing machine, which includes: a body with a guide hole recessed at the front end, and a through hole axially provided at the bottom end of the guide hole; an actuating element fixed to On a fixed object, the actuating element includes an actuating rod connected to the main body to link the main body; a knife seat with a guiding shaft protruding axially so that the guiding shaft is inserted in the guiding hole in an anastomosing manner , To guide the tool holder to move axially along the guide hole, and at the end of the guide shaft, an accommodating cavity is recessed axially, and a shaft hole penetrates through the bottom end of the accommodating cavity; a spring, It is placed between the accommodating cavity of the knife holder and the bottom end of the guide cavity of the body, and usually pushes the knife holder outward elastically; an adjusting rod whose rear end forms a screw section, and the rear end of the adjusting rod After the shaft hole at the front end of the knife holder penetrates through the through hole of the main body, at least one adjusting nut is screwed together; and a blade is locked to the front end of the knife holder, if it is actuated by the actuating element The main body cuts the work underneath by linking the blade.

In the cutting device of the sewing machine disclosed in the present invention, the actuating element can be a pneumatic/hydraulic actuating element or a solenoid valve actuating element, and the present invention is not self-limiting.

In the cutting device of the sewing machine disclosed in the present invention, the actuating rod and a guide rod of the main body are connected to each other by a universal coupling.

In the cutting device of the sewing machine disclosed in the present invention, the bottom end of the actuating rod is pressed against a guide rod of the body at ordinary times, and a return spring is placed between the guide rod and a fixed part.

In the cutting device of the sewing machine disclosed in the present invention, a guide member is locked on the guide rod, so that the free end of the guide member is inserted into a guide groove at the distal end.

In the cutting device of the sewing machine disclosed in the present invention, the guide groove is composed of two guide plates that are locked on the fixed wall.

In the cutting device of the sewing machine disclosed in the present invention, a block is embedded in the bottom end of the guide hole of the main body, and the block penetrates the through hole, so that the adjusting rod is screwed on the adjusting nut after passing through the through hole.

In the cutting device of the sewing machine disclosed in the present invention, the center of the blade is aligned with the axis of the guide shaft.

The cutting device of the sewing machine disclosed in this new model has the following characteristics and advantages: 1. Since the spring is installed in the guide shaft of the tool holder, the guide shaft of the tool holder can be inserted into the guide hole of the main body lengthwise, because the guide shaft is between the guide holes The gap is extremely small, and it is a longitudinal movement pair, so the knife holder is not easy to shake under the high-speed sewing action to ensure the smooth completion of the cutting operation. 2. The adjustment nut used to adjust the knife holder is set at the rear end of the body, that is, in the open space outside the sewing machine. The operator will not be hindered by other mechanisms of the sewing machine during adjustment, making the adjustment more convenient. 3. The free end of the guide member locked on the guide rod slides into a distal guide groove. Since the distance between the guide groove and the guide rod is increased, the angular displacement caused by the gap can be reduced , So that when the cutting is in progress, the tool holder will not be deviated, so that the cutting operation can be carried out smoothly. 4. The center of the blade disclosed in this new model is aligned with the axis of the guide shaft, so the cutting force will also be aligned with the axis of the guide shaft, which can avoid the bending moment on the blade during cutting. The cutting operation of the new type is smoother.

The desirable entities disclosed in the present invention can be clarified by the following descriptions and diagrams.

Please refer to Figures 1~6. The present invention relates to a cutting device for a sewing machine. It includes: a body (10) with a guide hole (11) recessed at the front end, and a guide hole (11) in the middle of the guide hole (11). The bottom end is provided with a through hole (12) axially; an actuating element (20) is fixed to a fixed object (F, which can be a fixed frame fixed to the sewing machine body, this model is not self-limiting), The actuating element (20) includes an actuating rod (21) connected to the main body (10) to link the movement of the main body (10); a knife seat (30) with a guide shaft (31) protruding axially, The guide shaft (31) is inserted into the guide hole (11) in a consistent lengthwise manner to guide the tool holder (30) to move along the axial direction of the guide hole (11), and is positioned on the guide shaft ( The end of 31) is axially recessed with an accommodating cavity (32), and a shaft hole (33) penetrates through the bottom end of the accommodating cavity (32); a spring (40) is placed in the tool holder (30) ) Between the accommodating cavity (32) and the bottom end of the guide cavity (11) of the main body (10), which elastically pushes the knife holder (30) outwards at ordinary times; an adjusting rod (50) with its rear end A screw section (51) is formed. The rear end of the adjusting rod (50) penetrates the shaft hole (33) at the front end of the tool holder (30) and passes through the through hole (12) of the body (10). , Screwing at least one adjusting nut (52); and a blade (60), which is locked to the front end of the knife holder (30), if the main body (10) is actuated by the actuating element (20) to link the blade (60) Cut off the work underneath.

In the cutting device of the sewing machine disclosed in the present invention, the actuating element (20) can be an actuating element (20) such as an air/hydraulic cylinder as shown in Fig. 1, or a solenoid valve actuating element (20) as shown in Figs. 7-8. 20'), this model is not self-limiting.

As shown in Figures 1 and 2, the cutting device of the sewing machine disclosed in the present invention has a guide rod (13) protruding from the main body (10), so that the actuating rod (21) and the guide rod (13) are tied A universal joint (22) is connected to each other, and the joint of the universal joint (22) can smoothly link the up and down movement of the main body (10).

As shown in Figures 1 and 2, the universal coupling (22) disclosed in the present invention includes: a first coupling member (221) connected or formed on the top end of the guide rod (13); a second coupling member (222) is connected to the bottom end of the actuating rod (21), and the first and second connecting members (221, 222) are pivotally connected to each other by a pivot (223). The aforementioned pivot (223) is fastened to the first coupling member (221) by a set screw (224).

As shown in Figures 7 and 8, the cutting device of the sewing machine disclosed in the present invention, in which the bottom end of the actuating rod (21') is pressed against a guide rod (13) of the body (10) at ordinary times, and A return spring (23) is placed between the guide rod (13) and a fixed portion (101). If the actuating rod (21') moves the main body (10) downwards and retracts, the return spring can be used (23) Return the body (10) to the starting position.

As shown in Figures 1, 2, 3, and 4, the cutting device of the sewing machine disclosed in the present invention, wherein the guide rod (13) is further locked with a guide member (14), so that the guide member (14) The free end (141) is inserted into a guide groove (102) at the distal end. When the main body (10) is moved up and down, the guide rod (13) can move up and down stably according to the guide groove (102) to reduce the angular displacement of the main body (10) when it is actuated , So that the blade (60) installed on the body (10) can be accurately staggered with the anvil (70) below it to cut the work object.

As shown in Figure 4, in the cutting device of the sewing machine disclosed in the present invention, the guide groove (102) is composed of two guide plate bodies (15) locked to a fixed wall (103). The above-mentioned fixed wall (103) can be the main body of the sewing machine or a frame fixed on the main body of the sewing machine, and the present invention is not self-limiting.

As shown in Figures 1 and 5, the cutting device of the sewing machine disclosed in the present invention, wherein a block (52) is embedded at the bottom of the guide hole (11) of the main body, and the block (52) penetrates the through hole ( 12), the adjusting rod (50) is positioned after passing through the through hole (12), and the adjusting nut (53) is screwed. The above-mentioned block (52) can be integrally formed with the body, and the present model is not self-limiting.

In the cutting device of the sewing machine disclosed in the present invention, the center of the blade (60) is aligned with the axis of the guide shaft (31). If so, when the blade (60) cuts downward, the force on the blade (60) can be more even, the vibration of the blade (60) can be reduced, and the cutting operation can be smoother.

As shown in Figure 6, the cutting device of the sewing machine disclosed in the present invention further includes a positioning plate (80) fixed on the body (10) so that the fixing plate (80) is provided with a positioning portion (81) extending into In a positioning hole (34) of the knife holder (30) to block the rotation of the knife holder (30), the blade (60) attached to the knife holder (30) will not produce left , Shake right.

The cutting device of the sewing machine disclosed in this new model has the following characteristics and advantages: 1. Because the spring (40) is inserted into the guide shaft (31), the guide shaft (31) of the tool holder (30) can extend into the guide hole of the body (10) lengthwise (11) Middle slip, because the gap between the guide shaft (31) and the guide hole (11) is extremely small, and is a longitudinal movement pair, the knife holder (30) is not easy to sew under high-speed sewing. Produce shaking to ensure the smooth completion of the cutting operation. 2. The adjustment nut (52) used to adjust the knife holder (30) is located at the open rear end of the body (10), so that the operator will not be hindered by other mechanisms of the sewing machine during adjustment, making the adjustment more convenient. 3. The guide rod (13) slides through a guide groove (102) located at the distal end by the end of the guide member (14), which is pulled by the distance between the guide groove (102) and the guide rod (13). It is long, so the angular displacement of the guide rod (13) due to the gap between the guide groove (102) can be reduced, and the cutting operation can be more stable. 4. The center of the blade (60) disclosed in this new model is aligned with the axis of the guide shaft (31), so the cutting force will also align with the axis of the guide shaft (31), which can avoid cutting. When breaking, an excessive bending moment is generated on the blade (60), so that the cutting operation of the new type is smoother.

The structure and shape disclosed in the present model can be modified and applied without violating the spirit and scope of the present model, and the present model is not limited to the above-mentioned embodiments.

(10): Body (11): Guide point (12): Through hole (13): Guide rod (14): Guiding member (141): free end (15): Guide plate body (20)(20’): Actuating element (21) (21’): Actuating lever (22): Universal coupling (221): first coupling member (222): second coupling member (223): Pivot (224): positioning screw (23):Return spring (30): knife holder (31): Guide shaft (32): Containing Holes (33): Shaft hole (34): Location Point (40): Spring (50): Adjusting lever (51): Screw section (52): blocking (53): Adjusting nut (60): Blade (70): Anvil (80): positioning plate (81): Positioning part (101): Fixed part (102): Guide groove (103): fixed wall (F): Fixture

Figure 1: The three-dimensional exploded view of the present invention. Figure 2: It is a three-dimensional view of Figure 1 combined. Figure 3: A three-dimensional view showing the new model installed on the sewing machine. Figure 4: A partial three-dimensional schematic diagram showing a shield removed from Figure 3; Figure 5: is a schematic diagram of the cross-sectional structure in the direction marked 5-5 in Figure 4. Figure 6: is a perspective view from the back of Figure 2. Figure 7: is a three-dimensional exploded view of another embodiment of the present invention. Figure 8: is a schematic diagram of the embodiment shown in Figure 7 installed on a sewing machine.

(10): Body

(11): Guide point

(12): Through hole

(13): Guide rod

(30): knife holder

(31): Guide shaft

(32): Containing Holes

(33): Shaft hole

(40): Spring

(50): Adjusting lever

(51): Screw section

(52): blocking

(53): Adjusting nut

(60): Blade

(70): Anvil

Claims (10)

A cutting device for a sewing machine includes: a body with a guide hole recessed at the front end, and a through hole axially provided at the bottom end of the guide hole; an actuating element fixed on a fixed object, the actuation The element contains an actuating rod connected to the main body to move the main body; a knife seat with a guide shaft protruding in the axial direction, so that the guide shaft is inserted into the guide hole to guide the knife seat edge The guide cavity is axially displaced, and at the end of the guide shaft, an accommodating cavity is axially recessed, and a shaft hole penetrates through the bottom end of the accommodating cavity; a spring is placed in the cavity of the tool holder Between the inside of the cavity and the bottom end of the guide hole of the body, the tool holder is usually pushed outward elastically; an adjusting rod whose rear end forms a screw section, and the rear end of the adjusting rod is from the shaft hole at the front end of the tool holder After penetrating through the through hole of the body, screwing at least one adjusting nut; and a blade, which is locked to the front end of the knife holder, if the body is actuated by the actuating element to link the blade cutting Break down the work underneath. The cutting device of a sewing machine according to claim 1, wherein the main body is provided with a guide rod protruding, so that the actuating rod and the guide rod are connected to each other by a universal coupling. The cutting device of the sewing machine according to claim 2, wherein the universal coupling includes: a first coupling member connected or formed on the top end of the guide rod; and a second coupling member connected to the actuating rod The bottom end is pivotally connected to each other by a pivot between the first and second connecting members. The cutting device of the sewing machine according to claim 3, wherein the pivot is fastened to the first coupling member by a set screw. The cutting device of the sewing machine according to claim 1, wherein the body is provided with a guide rod protruding, wherein the bottom end of the actuating rod is pressed against the guide rod at ordinary times, and the guide rod and a fixed part are between the guide rod and the guide rod. There is a return spring. The cutting device of the sewing machine according to claim 2 or 5, wherein a guide member is further locked on the guide rod, so that the free end of the guide member is inserted into a distal guide groove. The cutting device of a sewing machine according to claim 6, wherein the guide groove is formed by two guide plates locked to the one fixed wall. The cutting device of the sewing machine according to claim 1, wherein a block is embedded in the bottom end of the guide hole of the main body, and the through hole penetrates through the block. The cutting device of a sewing machine according to claim 1, wherein the center of the blade is aligned with the axis of the guide shaft. The cutting device of the sewing machine according to claim 1, further comprising a positioning plate fixed on the body, so that the fixing plate is provided with a positioning portion extending into a positioning hole of the knife holder.

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