阅读说明：本技术 一种喷气织机用凸轮控制的纬纱剪刀 (Cam-controlled weft scissors for air-jet loom ) 是由 杨延增 范玉龙 张辉 周纬纬 何晓波 于 2021-09-02 设计创作，主要内容包括：本发明公开了一种喷气织机用凸轮控制的纬纱剪刀,属于喷气织机技术领域。一种喷气织机用凸轮控制的纬纱剪刀,包括套接于凸轮轴上的传动凸轮、夹设于桁架上的夹持固定座及安装于滑轨上的剪刀机构,本发明通过在凸轮轴上设置传动凸轮,利用凸轮轴转动力带动传动凸轮转动,从而使传动凸轮间歇挤压与其抵触的直角压块,直角压块受压后带动顶杆上行,从而使与顶杆转动连接的剪刀组件实现剪切动作,与此同时,当顶杆上行时,也将带动抗隆组件对布料侧边进行压缩限位,避免通过的布料受剪刀组件剪切时布料与剪刀组件之间的摩擦力造成布料的隆起,进而提高布料切边的质量。本发明结构紧凑,功能强大,有效降低布料在剪切时造成的隆起折边。(The invention discloses a cam-controlled weft yarn scissors for an air jet loom, and belongs to the technical field of air jet looms. A cam-controlled weft yarn scissors for an air jet loom comprises a transmission cam sleeved on a cam shaft, a clamping fixing seat clamped on a truss and a scissors mechanism arranged on a sliding rail. The cloth shearing machine is compact in structure and powerful in function, and the raised edges generated when the cloth is sheared are effectively reduced.)

1. The utility model provides a weft scissors of cam control for air jet loom which characterized in that: the clamping mechanism comprises a transmission cam (1) sleeved on a cam shaft, a clamping fixing seat (2) clamped on a truss and a scissor mechanism installed on a sliding rail, wherein the clamping fixing seat (2) comprises a lower clamping block (201) and an upper clamping block (202) vertically matched with the lower clamping block (201), one side end face of the lower clamping block (201) is rotatably connected with a right-angle pressing block (3) through a rotating shaft, the input end of a longitudinal arm of the right-angle pressing block (3) is in extrusion contact with the outer wall of the transmission cam (1), the output end of a transverse arm of the right-angle pressing block (3) is rotatably connected with a push rod (4), and the transverse arm of the right-angle pressing block (3) is connected with one side end part of the upper clamping block (202) through a spring (5);

scissors mechanism includes movable seat (6) of movable mounting on the slide rail, blade holder (7) are installed near transmission cam (1) one side in movable seat (6), be equipped with scissors subassembly (8) in blade holder (7), scissors subassembly (8) are connected through round pin axle (9) rotation with ejector pin (4), blade holder (7) top surface still is equipped with anti long subassembly (10), anti long subassembly (10) input is through ejector pad (11) and ejector pin (4) sliding connection.

2. A cam-controlled weft scissors for an air jet loom according to claim 1, characterized in that: the lower clamping block (201) is fixedly arranged on the bottom surface of the truss, the upper clamping block (202) is fixedly arranged on the top surface of the truss, the upper clamping block (202) and the lower clamping block (201) are in clearance fit to form a clamping cavity, and the height of the clamping cavity is matched with the rotation angle of the right-angle pressing block (3).

3. A cam-controlled weft scissors for an air jet loom according to claim 1, characterized in that: blade holder (7) comprise linking up piece (701), a movable blade installation section of thick bamboo (702), static blade installation piece (703) and guide block (704), link up piece (701) and set firmly and be close to drive cam (1) one end top surface in movable seat (6), movable blade installation section of thick bamboo (702) are located and are linked up piece (701) and be close to ejector pin (4) a side end face, static blade installation piece (703) are located movable blade installation section of thick bamboo (702) one side and are relative with ejector pin (4), the top of static blade installation piece (703) one side is located in guide block (704), just guide block (704) and anti-long subassembly (10) sliding connection.

4. A cam-controlled weft scissors for an air jet loom according to claim 3, characterized in that: the connecting block (701), the movable blade mounting barrel (702), the static blade mounting block (703) and the guide block (704) are of an integrally formed structure.

5. A cam-controlled weft scissors for an air jet loom according to claim 3, characterized in that: scissors subassembly (8) are including locating scissors axle (801) inside movable blade installation section of thick bamboo (702), scissors axle (801) one end is passed through carousel (802) and is connected with movable blade installation section of thick bamboo (702) inner wall rotation, scissors axle (801) other end stretches out movable blade installation section of thick bamboo (702) and has set firmly blade disc (803), blade disc (803) openly centre of a circle department rotate be connected with movable blade (804), movable blade (804) outside is equipped with rather than shearing formula complex stationary blade (805), stationary blade (805) horizontal installation is in stationary blade installation piece (703) openly.

6. A cam-controlled weft scissors for an air jet loom according to claim 5, characterized in that: the movable blade (804) comprises blade parts (806), an installation part (807) and a jacking part (808) which are sequentially arranged, the installation part (807) is connected with the circle center of the cutter head (803), and the jacking part (808) is rotatably connected with the top end of the ejector rod (4) through a pin shaft (9).

7. A cam-controlled weft scissors for an air jet loom according to claim 6, characterized in that: the anti-humping component (10) comprises an upper limiting block (1001) which horizontally slides with a guide block (704), wherein the upper limiting block (1001) consists of a sliding part (1002), a contact part (1003) and a pushing part (1004), the sliding part (1002) is in sliding fit with a guide groove in the guide block (704) through a guide strip (1005), the contact part (1003) is arranged at the terminal of the sliding part (1002), an oblique opening (1006) is formed in the bottom surface of one side, close to a blade part (806), of the contact part (1003), the pushing part (1004) is arranged at the starting end of the sliding part (1002), and a through groove which vertically slides with the pushing block (11) is formed in the pushing part (1004).

8. A cam-controlled weft scissors for an air jet loom according to claim 7, characterized in that: the anti-swelling assembly (10) further comprises a lower limiting block (1007) arranged below the upper limiting block (1001), the lower limiting block (1007) is fixedly arranged on the guide block (704) and is horizontal to the static blade (805), the lower limiting block (1007) and the upper limiting block (1001) are in clearance fit to form a cloth anti-swelling cavity, and the height of the cloth anti-swelling cavity is 1.2 times of the thickness of cloth.

9. A cam-controlled weft scissors for an air jet loom according to claim 8, characterized in that: the guide block (1008) is fixedly arranged at the position, close to the intersection point of the cutting edge of the movable blade (804) and the cutting edge of the static blade (805), of the top surface of the lower limiting block (1007), the guide block (1008) is of an arc structure, the starting end of an arc is close to the scissor assembly (8), and the end of the arc extends out of the side edge of the lower limiting block (1007).

10. A cam-controlled weft scissors for an air jet loom according to claim 1, characterized in that: the push block (11) is vertically arranged, and the lower end of the push block (11) is fixedly connected with the outer wall of the pin shaft (9).

Technical Field

The invention relates to the technical field of air jet looms, in particular to a cam-controlled weft scissors for an air jet loom.

Background

Air jet looms are shuttleless looms that use a jet of air to pull the weft yarn through the shed. The working principle is that air is used as a weft insertion medium, the ejected compressed airflow generates friction traction force on weft yarn to pull the weft yarn, the weft yarn is taken through a shed, and the purpose of weft insertion is achieved through jet flow generated by air ejection.

The so-called weft catching is that the weft yarn pulled by the jetted compressed air flow is caught, so that the position of the weft yarn is fixed, and the warp yarn and the weft yarn can be accurately woven together. Also, since the tail of the weft needs to be caught by this catching operation, the tail of the weft cannot be woven with the warp, and the excessive tail of the weft needs to be cut off when the cloth is delivered. When the existing weft scissors cut off redundant weft yarns, the friction between the scissors and the weft yarns easily causes the bulging and folding edges, so that the cutting quality is poor, and the cloth trimming quality is influenced.

Disclosure of Invention

1. Technical problem to be solved

The invention aims to provide a cam-controlled weft scissors for an air jet loom, which aims to solve the problems in the background technology.

2. Technical scheme

A cam-controlled weft yarn scissors for an air jet loom comprises a transmission cam sleeved on a cam shaft, a clamping fixing seat clamped on a truss and a scissor mechanism installed on a slide rail, wherein the clamping fixing seat comprises a lower clamping block and an upper clamping block vertically matched with the lower clamping block;

the scissors mechanism comprises a movable seat movably mounted on the sliding rail, a tool apron is mounted on one side, close to the transmission cam, of the movable seat, a scissors assembly is arranged in the tool apron, the scissors assembly is rotatably connected with the ejector rod through a pin shaft, an anti-swelling assembly is further arranged on the top surface of the tool apron, and the input end of the anti-swelling assembly is connected with the ejector rod in a sliding mode through a push block. According to the invention, the transmission cam is arranged on the cam shaft, and is driven to rotate by the rotating force of the cam shaft, so that the transmission cam intermittently extrudes the right-angle pressing block abutted against the transmission cam, the right-angle pressing block drives the ejector rod to move upwards after being pressed, and the shearing action of the shear assembly rotationally connected with the ejector rod is realized. The cloth shearing machine is compact in structure and powerful in function, and the raised edges generated when the cloth is sheared are effectively reduced.

Preferably, the lower clamping block is fixedly arranged on the bottom surface of the truss, the upper clamping block is fixedly arranged on the top surface of the truss, the upper clamping block and the lower clamping block are in clearance fit to form a clamping cavity, and the height of the clamping cavity is matched with the rotation angle of the right-angle pressing block. According to the invention, the height of the clamping cavity, the rotation angle of the right-angle pressing block and the length of the protrusion of the transmission cam are matched with each other, so that the right-angle pressing block can rotate continuously, and the scissors assembly and the anti-swelling assembly can continuously act on the cloth.

Preferably, the blade holder comprises linking piece, a moving blade installation section of thick bamboo, static blade installation piece and guide block, linking piece sets firmly in the movable seat and is close to drive cam one end top surface, the moving blade installation section of thick bamboo is located linking piece and is close to ejector pin side end face, static blade installation piece is located moving blade installation section of thick bamboo one side and relative with the ejector pin, the top of static blade installation piece one side is located to the guide block, just guide block and anti-long subassembly sliding connection.

Preferably, the connecting block, the movable blade mounting cylinder, the fixed blade mounting block and the guide block are of an integrally formed structure. The integrated into one piece's structural strength is more stable.

Preferably, the scissors subassembly is including locating the inside scissors axle of moving blade installation section of thick bamboo, scissors axle one end is passed through the carousel and is connected with the rotation of moving blade installation section of thick bamboo inner wall, the scissors axle other end stretches out the moving blade installation section of thick bamboo and has set firmly the blade disc, the positive centre of a circle department of blade disc rotates and is connected with the moving blade, the moving blade outside is equipped with rather than cutting formula complex stationary blade, stationary blade horizontal installation is positive in stationary blade installation piece.

Preferably, the moving blade comprises a blade part, an installation part and a jacking part which are sequentially arranged, the installation part is connected with the circle center of the cutter head, and the jacking part is rotatably connected with the top end of the ejector rod through a pin shaft. According to the invention, the ejector rod pushes the jacking part of the movable blade upwards, so that the movable blade makes a seesaw motion around the center of the cutter head, and further, the reciprocating shearing is realized.

Preferably, anti long subassembly include with the guide block horizontal slip last spacing piece, last spacing piece comprises sliding part, contact site and promotion portion, the sliding part passes through the conducting bar and the inside guide slot sliding fit of guide block, the sliding part terminal is located to the contact site, just the contact site is close to cutting edge portion one side bottom surface and has seted up the bevel connection, the sliding part is located to the promotion portion and is held, just set up in the promotion portion with the perpendicular gliding groove of lining up of ejector pad. The bottom surface of the contact part is provided with a section of plane and a section of inclined surface, and the inclined surface is arranged to facilitate the cloth to be smoothly guided by the inclined surface to enter the lower part of the upper limiting block, so that the cloth can be effectively prevented from bulging after the limit of the plane height.

Preferably, anti heavy subassembly is still including locating the lower stopper that goes up stopper below, lower stopper sets firmly on the guide block and with the stationary blade level, just lower stopper forms the cloth with last stopper clearance fit and prevents the uplift chamber, the height in cloth prevents the uplift chamber is 1.2 times of cloth thickness. The height of the cloth uplift-preventing cavity is slightly larger than the thickness of the cloth, and the cloth uplift-preventing cavity is not in extrusion contact with the cloth, so that the continuous shearing of the cloth can be realized during rolling.

Preferably, a material guide block is fixedly arranged at a position, close to the intersection point of the cutting edge of the movable blade and the cutting edge of the static blade, of the top surface of the lower limiting block, the material guide block is of an arc structure, the starting end of the arc is close to the scissor assembly, and the end of the arc extends out of the side edge of the lower limiting block. According to the invention, the material guide block with the arc structure is arranged on the top surface of the lower limiting block, so that the cut cloth is guided out of the cloth anti-bulging cavity by the arc surface, and the accumulation of residual materials is avoided.

Preferably, the ejector pad is vertical setting, just ejector pad lower extreme and round pin axle outer wall fixed connection.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

according to the invention, the transmission cam is arranged on the cam shaft, and is driven to rotate by the rotating force of the cam shaft, so that the transmission cam intermittently extrudes the right-angle pressing block abutted against the transmission cam, the right-angle pressing block drives the ejector rod to move upwards after being pressed, and the shearing action of the shear assembly rotationally connected with the ejector rod is realized. The cloth shearing machine is compact in structure and powerful in function, and the raised edges generated when the cloth is sheared are effectively reduced.

Drawings

FIG. 1 is a schematic rear view of the overall structure of the present invention;

FIG. 2 is a schematic front view of the overall structure of the present invention;

FIG. 3 is a schematic view of the scissors mechanism of the present invention, shown disassembled;

FIG. 4 is a schematic partial structural breakdown of the present invention;

the reference numbers in the figures illustrate: 1. a drive cam; 2. a clamping fixing seat; 201. a lower clamping block; 202. an upper clamping block; 3. a right-angle pressing block; 4. a top rod; 5. a spring; 6. a movable seat; 7. a tool apron; 701. a joining block; 702. the movable blade mounting cylinder; 703. a stationary blade mounting block; 704. a guide block; 8. a scissor assembly; 801. a scissor shaft; 802. a turntable; 803. a cutter head; 804. a movable blade; 805. a stationary blade; 806. a knife edge part; 807. an installation part; 808. a jack-up portion; 9. a pin shaft; 10. an anti-doming component; 1001. an upper limit block; 1002. a sliding part; 1003. a contact portion; 1004. a pushing part; 1005. conducting bars; 1006. a bevel opening; 1007. a lower limiting block; 1008. a material guide block; 11. and (7) pushing the block.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-4, the present invention provides a technical solution:

a cam-controlled weft yarn scissors for an air jet loom comprises a transmission cam 1 sleeved on a cam shaft, a clamping fixing seat 2 clamped on a truss and a scissors mechanism installed on a sliding rail, wherein the clamping fixing seat 2 comprises a lower clamping block 201 and an upper clamping block 202 vertically matched with the lower clamping block 201, one side end face of the lower clamping block 201 is rotatably connected with a right-angle pressing block 3 through a rotating shaft, the input end of a longitudinal arm of the right-angle pressing block 3 is in extrusion contact with the outer wall of the transmission cam 1, the output end of a cross arm of the right-angle pressing block 3 is rotatably connected with a push rod 4, and the cross arm of the right-angle pressing block 3 is connected with one side end part of the upper clamping block 202 through a spring 5;

the scissors mechanism includes movable seat 6 of movable mounting on the slide rail, and blade holder 7 is installed to movable seat 6 near 1 one side of transmission cam, is equipped with scissors subassembly 8 in the blade holder 7, and scissors subassembly 8 rotates through round pin axle 9 with ejector pin 4 to be connected, and blade holder 7 top surface still is equipped with anti long-pending subassembly 10, and anti long-pending subassembly 10 input passes through ejector pad 11 and ejector pin 4 sliding connection. According to the invention, the transmission cam 1 is arranged on the cam shaft, the transmission cam 1 is driven to rotate by the rotation force of the cam shaft, so that the transmission cam 1 intermittently extrudes the right-angle pressing block 3 abutted against the transmission cam 1, the right-angle pressing block 3 drives the ejector rod 4 to move upwards after being pressed, and the shear component 8 rotationally connected with the ejector rod 4 realizes shearing action, meanwhile, when the ejector rod 4 moves upwards, the anti-bulging component 10 is driven to compress and limit the side edge of the cloth, the cloth is prevented from bulging due to the friction force between the cloth and the shear component 8 when the passing cloth is sheared by the shear component 8, and the quality of cloth trimming is further improved. The cloth shearing machine is compact in structure and powerful in function, and the raised edges generated when the cloth is sheared are effectively reduced.

Specifically, the lower clamping block 201 is fixedly arranged on the bottom surface of the truss, the upper clamping block 202 is fixedly arranged on the top surface of the truss, the upper clamping block 202 and the lower clamping block 201 are in clearance fit to form a clamping cavity, and the height of the clamping cavity is matched with the rotation angle of the right-angle pressing block 3. According to the invention, the height of the clamping cavity, the rotation angle of the right-angle pressing block 3 and the protruding length of the transmission cam 1 are mutually matched, so that the right-angle pressing block 3 can continuously rotate, and the scissors assembly 8 and the anti-swelling assembly 10 can continuously act on the cloth.

Further, the tool apron 7 is composed of a connecting block 701, a movable blade mounting cylinder 702, a stationary blade mounting block 703 and a guide block 704, the connecting block 701 is fixedly arranged on the top surface of one end of the movable seat 6 close to the transmission cam 1, the movable blade mounting cylinder 702 is arranged on the end surface of one side of the connecting block 701 close to the ejector rod 4, the stationary blade mounting block 703 is arranged on one side of the movable blade mounting cylinder 702 and opposite to the ejector rod 4, the guide block 704 is arranged above one side of the stationary blade mounting block 703, and the guide block 704 is slidably connected with the anti-swelling component 10.

Still further, the connecting block 701, the moving blade mounting cylinder 702, the stationary blade mounting block 703 and the guide block 704 are integrally formed. The integrated into one piece's structural strength is more stable.

Furthermore, the scissors assembly 8 comprises a scissors shaft 801 arranged inside the movable blade mounting cylinder 702, one end of the scissors shaft 801 is rotatably connected with the inner wall of the movable blade mounting cylinder 702 through a turntable 802, the other end of the scissors shaft 801 extends out of the movable blade mounting cylinder 702 and is fixedly provided with a cutter head 803, the center of the front circle of the cutter head 803 is rotatably connected with the movable blade 804, the outer side of the movable blade 804 is provided with a static blade 805 matched with the movable blade 804 in a scissors mode, and the static blade 805 is horizontally arranged on the front of the static blade mounting block 703.

It is worth to be noted that the movable blade 804 includes a blade portion 806, a mounting portion 807 and a jacking portion 808 which are arranged in sequence, the mounting portion 807 is connected with the center of the cutter head 803, and the jacking portion 808 is rotatably connected with the top end of the push rod 4 through a pin 9. According to the invention, the jacking part 808 of the movable blade 804 is pushed upwards by the mandril 4, so that the movable blade 804 makes a seesaw motion around the circle center of the cutter head 803, and further, the reciprocating shearing is realized.

It should be noted that the anti-protrusion assembly 10 includes an upper limiting block 1001 horizontally sliding with the guide block 704, the upper limiting block 1001 is composed of a sliding portion 1002, a contact portion 1003 and a pushing portion 1004, the sliding portion 1002 is slidably fitted with a guide groove inside the guide block 704 through a guide bar 1005, the contact portion 1003 is disposed at a terminal end of the sliding portion 1002, a bevel 1006 is disposed on a bottom surface of the contact portion 1003 near the knife edge 806, the pushing portion 1004 is disposed at a starting end of the sliding portion 1002, and a through groove vertically sliding with the pushing block 11 is disposed on the pushing portion 1004. The bottom surface of the contact part 1003 is a section of plane and a section of inclined surface, and the inclined surface is arranged to facilitate the cloth to be smoothly guided by the inclined surface to enter the lower part of the upper limiting block 1001, so that the cloth can be effectively prevented from bulging after the height of the plane is limited.

In addition, anti-swelling subassembly 10 still includes lower spacing block 1007 of locating the lower side of last spacing block 1001, and lower spacing block 1007 sets firmly on guide block 704 and level with stationary blade 805, and just lower spacing block 1007 forms the cloth and prevents the uplift chamber with last spacing block 1001 clearance fit, and the height that the cloth prevented the uplift chamber is 1.2 times of cloth thickness. The height of the cloth uplift-preventing cavity is slightly larger than the thickness of the cloth, and the cloth uplift-preventing cavity is not in extrusion contact with the cloth, so that the continuous shearing of the cloth can be realized during rolling.

In addition, a material guide block 1008 is fixedly arranged on the top surface of the lower limiting block 1007 near the intersection point of the cutting edges of the movable blade 804 and the stationary blade 805, the material guide block 1008 is of an arc structure, the starting end of the arc is close to the scissor assembly 8, and the terminal end of the arc extends out of the side edge of the lower limiting block 1007. According to the invention, the top surface of the lower limiting block 1007 is provided with the material guide block 1008 of an arc structure, so that the sheared cloth is guided out of the cloth anti-bulging cavity by the arc surface, and the accumulation of residual materials is avoided.

In addition, the push block 11 is arranged vertically, and the lower end of the push block 11 is fixedly connected with the outer wall of the pin shaft 9.

The working principle is as follows: the transmission cam 1 is driven to rotate by the rotating force of the cam shaft, so that the transmission cam 1 intermittently extrudes the right-angle pressing block 3 which is abutted against the transmission cam 1, the input end of the longitudinal arm of the right-angle pressing block 3 is pressed to drive the right-angle pressing block 3 to rotate, the output end of the transverse arm of the right-angle pressing block 3 rotates and does circular arc ascending, at the moment, the spring 5 is pressed to store force, and when the output end of the transverse arm of the right-angle pressing block 3 ascends, the ejector rod 4 which is connected with the right-angle pressing block 3 in a rotating mode is driven to ascend, so that the upper end of the ejector rod 4 pushes the jacking part 808 of the movable blade 804, the movable blade 804 rotates around the center of the cutter head 803, and then is matched with the static blade 805 to form a shearing action; meanwhile, when the jacking portion 808 tilts around the center of the cutter head 803, the pushing block 11 fixedly connected with the pin shaft 9 is also pushed to move upwards, and because the pin shaft 9 does circular motion upwards at the moment, the pushing block 11 does linear motion in the horizontal direction in addition to the linear motion in the vertical direction, so that the pushing block 11 extrudes the pushing portion 1004 connected with the pushing block in a sliding manner, and the upper limiting block 1001 horizontally slides on the guide block 704, and the motion direction is opposite to the cloth winding direction. The cloth is not only sheared by intermittent type formula movable blade 804 and stationary blade 805 when the rolling, also will be by last spacing block 1001 and spacing block 1007 clearance fit formation cloth anti-humping chamber spacing down to the frictional force between cloth and the scissors subassembly 8 causes the hump of cloth when avoiding the cloth that passes through to receive scissors subassembly 8 to cut, and then improves the quality that the cloth was cut edge.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.