Jacquard loom warp thread selection control unit

Abstract

By distributing the load on the vertical needles, a highly durable warp thread selection control unit for a jacquard loom is provided. [Solution] A warp thread selection control unit 1 for a jacquard loom is provided, comprising a support guide mechanism 20 having multiple vertical needles 10 arranged at the front and rear, multiple vertical needle holders 21 that support each vertical needle 10, and a lifting hook mechanism 30 having multiple hook portions 32 that engage with each vertical needle 10 and move up and down relative to the support guide mechanism 20. The hooks 33 of the hook portions 32 rotate, bringing their tips out into the passage 31, thereby engaging with the vertical needles 10. A support step portion 38 is provided at the rear of the front hook portion 32 to support the vertical needle 10 that has engaged with the hook 33.

Description

Technical Field

[0001] The present invention relates to a warp selection control unit of a Jacquard loom.

Background Art

[0002] Various types of loom warp selection mechanisms have been developed to date. One such type consists of a vertical needle having a lower end connected to a harness cord, a support guide mechanism that supports the vertical needle and drives it up and down, and a lifting hook mechanism that selectively engages with the vertical needle and drives it up and down. In this loom warp selection mechanism, for example, the lifting hook mechanism selectively engages with and raises a vertical needle connected to a predetermined warp. As a result, the warp also rises to form an upper half-opening. On the other hand, since the non-engaged vertical needles continue to be supported by the support guide mechanism, the warps connected to the non-engaged vertical needles do not move and form a lower half-opening. The shuttle opening is formed by this upper half-opening and lower half-opening. As shown in Patent Document 1, the present applicant has proposed a warp selection control unit for a Jacquard loom that includes a vertical needle, a support guide mechanism (floor board) that guides the vertical needle up and down, and a select housing (lifting hook mechanism) supported by a movable frame, and can engage the vertical needle and the lifting hook mechanism only by its repulsive driving force based on an extremely small excitation current.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the warp selection control unit of the jacquard loom described in Patent Document 1, when selecting a warp thread to form an upper opening for that warp thread, the entire load was borne by the hook that engages with the vertical needle connected to the selected warp thread. In particular, when forming an upper opening in a woven state, the load includes not only the weight of the warp thread but also the surrounding weight. As a result, the load on the vertical needle and the hook that engages with and supports it becomes large, which can lead to malfunction. This invention was made to solve the above problems, and aims to provide a highly durable warp thread selection control unit for a jacquard loom by distributing the load on the warp needles. [Means for solving the problem]

[0005] The warp selection control unit for a jacquard loom of the present invention comprises a plurality of vertical needles arranged in a row, a support guide mechanism that supports and drives the plurality of vertical needles up and down, and a lifting hook mechanism that selectively engages with each vertical needle and moves up and down relative to the support guide mechanism, wherein the vertical needles have hook engagement portions at their upper parts, and the lifting hook mechanism has a plurality of passages through which the upper parts of the vertical needles pass, and a plurality of hook portions each having a hook that can be moved in and out of the passages, wherein when the hook is moved out of the passage, the hook engages with the hook engagement portion of the vertical needle, and when the hook and the hook engagement portion are engaged, the hook and / or a part of the vertical needle is supported by a support step formed on an adjacent hook portion.

[0006] In the warp thread selection control unit for a jacquard loom of the present invention, it is preferable that the hook engagement portion is a through hole that penetrates the upper part of the vertical needle in a single row direction. In the warp thread selection control unit for a jacquard loom of the present invention, it is preferable that the support step portion is inclined upward in the direction in which the hook is extended. The warp thread selection control unit for a jacquard loom of the present invention preferably has an upper end that protrudes from the upper part in a direction that extends the hook, and when the hook and the hook engaging portion are engaged, the upper end is supported by the support step portion. The warp thread selection control unit for a jacquard loom of the present invention preferably has vertical needles that are thicker in a row direction from the upper part and have a lower part that protrudes in the direction of releasing the hook relative to the upper part, the lower end of the adjacent hook portion opposite to the direction of releasing the hook has a lower guide surface that extends downward in the direction of releasing the hook, and the lower guide surface of the adjacent hook portion is continuous with the passage. [Effects of the Invention]

[0007] The warp thread selection control unit of the Jacquard loom of the present invention can distribute the load applied to a hook to an adjacent hook when the hook of the hook section is extended to engage with a selected warp needle, thereby reducing the load applied to the hook that engages with the selected warp needle. As a result, it is less prone to malfunction and the frequency of maintenance can be reduced. [Brief explanation of the drawing]

[0008] [Figure 1] This is a schematic diagram showing one embodiment of the warp thread selection control unit for a jacquard loom according to the present invention. [Figure 2] Figures 2a and 2b are side and front views of the warp needle used in the warp thread selection control unit shown in Figure 1, respectively, and Figure 2c is a partially enlarged view of Figure 2a. [Figure 3] Figure 3a is a schematic diagram of the hook section used in the warp thread selection control unit of Figure 1, Figure 3b is an enlarged schematic diagram showing the hook, and Figure 3c is an enlarged schematic diagram showing the hook in the state where it is extended into the passage. [Figure 4] Figures 4a to 4e are schematic diagrams showing the operation of the warp thread selection control unit of the jacquard loom shown in Figure 1. [Figure 5]Figure 5a is an enlarged view showing details of Figure 4b, Figure 5b is an enlarged view showing the state after Figure 4e (or Figure 4a), Figure 5c is a state diagram showing another embodiment of the engagement between the hook and the vertical needle, and Figure 5d is a schematic diagram showing another embodiment of the vertical needle. [Modes for carrying out the invention]

[0009] Next, embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to the following embodiments.

[0010] "Jacquard loom warp thread selection control unit 1" As shown in Figure 1, the warp selection control unit 1 of the Jacquard loom comprises a plurality of vertical needles 10 arranged in a front-to-back row, a support guide mechanism 20 that supports and drives the plurality of vertical needles up and down, and a lifting hook mechanism 30 that selectively engages with each vertical needle 10 and moves up and down relative to the support guide mechanism 20. The support guide mechanism 20 has a plurality of vertical needle holders 21 that support each vertical needle 10. The lifting hook mechanism 30 has a plurality of hook portions 32 that engage with each vertical needle 10. These hook portions 32 are arranged in a front-to-back row between adjacent vertical needles 10. As the hook 33 of the hook portion 32 rotates, its tip extends into the front passage 31 and engages with the vertical needle 10. In other words, in this embodiment, the hook 33 protrudes forward. A support step 38 is provided at the rear of the adjacent hook portion 32 to support the vertical needle 10 that is engaged with the hook 33 (see Figure 5a). With the predetermined vertical needle 10 engaged with the hook portion 32, the support guide mechanism 20 and the lifting hook mechanism 30 are raised and lowered relative to each other, and the shuttle opening for the warp threads is formed when they are at their maximum distance from each other. In Figure 1, the arrows indicate the forward and backward directions.

[0011] "Vertical needle 10" Multiple vertical needles 10 are arranged in a single row, front to back, at regular intervals. As shown in Figure 2a, the vertical needle 10 has an upper part 11 and a lower part 16 with different thicknesses in the front-to-back direction. An elongated hole (hook engagement portion) 12 is formed in the upper part 11, penetrating in the front-to-back direction. The opening of the elongated hole 12 is rectangular in shape (see Figure 2b). As shown in Figure 2c, the top surface 12a, which forms the upper edge of the opening of the elongated hole 12, and the bottom surface 12b, which forms the lower edge of the opening of the elongated hole 12, are slopes that extend forward and upward. The lower part 16 has an engagement step 17 that engages with the vertical needle holder 20, and a through hole 18 at its lower end through which the warp thread or threader passes. By passing the warp thread or threader through this through hole 18, the vertical needle 11 and the warp thread are connected. The lower section 16 is thicker in the front-to-back direction than the upper section 11. More specifically, the lower front surface 16a of the lower section 16 protrudes forward from the upper front surface 11a of the upper section 11. The area between the upper front surface 11a of the upper section 11 and the lower front surface 16a of the lower section 16 is a slope 15. Furthermore, above the upper part 11 of the vertical needle 11 (above the elongated hole 12), there is an upper end portion 19 that protrudes forward relative to the upper front surface 11a of the upper part 11 and extends in a manner that tapers upward. The upper end front section 19a (see Figure 2c) between this upper end portion 19 and the front side (upper front surface 11a) of the upper part 11 is a slope that extends forward toward upward. On the other hand, the upper end rear section 19b is provided between the upper end portion 19 and the top surface 12a.

[0012] "Support guide mechanism 20" Returning to Figure 1, the support guide mechanism 20 comprises a base plate (not shown) and a plurality of vertical needle holders 21 that support each vertical needle 10. That is, the plurality of vertical needle holders 21 are arranged in a front-to-back row at regular intervals, similar to the vertical needles 10. The base plate fixes each vertical needle holder 21, meaning that the plurality of vertical needle holders 21 are integrated via the base plate. The vertical needle holder 21 is provided with a support portion 21a into which the lower engagement step portion 17 of the vertical needle 10 is locked. However, the relationship between the vertical needle holder 21 and the vertical needle 10 is not particularly limited, as long as the vertical needle holder 21 supports the vertical needle 10, restricts the downward movement of the vertical needle 11, and allows the upward movement of the vertical needle 11.

[0013] "Lifting hook mechanism 30" As shown in Fig. 3a, the lifting hook mechanism 30 has a plurality of passages 31, a plurality of hook portions 32, and a housing (not shown) for fixing the plurality of hook portions 32. That is, the passages 31 and the hook portions 32 are arranged in a fixed interval in a front-back row and alternately.

[0014] "Passage 31" The passage 31 is a vertically extending space for guiding the vertical needles 10 that move up and down. It at least passes through the upper portions 11 of each vertical needle 10 and is provided coaxially with each vertical needle 10. This passage 31 is formed from the gap between the hook portions 32 arranged front and back.

[0015] "Hook portion 32" The hook portion 32 includes a hook 33 that can be inserted into and removed from the passage 31. Specifically, it includes a hook 33, a drive portion 34 for driving the hook, and a cassette 35 for housing them all. As shown in Figs. 3b and 3c, the hook 33 is rotatably fixed with its lower end as a fulcrum shaft 33a. A permanent magnet is attached to the tip 33b of the hook 33. And below the tip 33b of the hook 33, a locking step portion 36 is provided so as to protrude forward. The locking step portion 36 is provided such that when the hook 33 is taken out into the passage 31, the upper surface 36a of the hook 33 engages with the top surface 12a of the long hole 12 of the vertical needle 10. At that time, the tip 33b of the hook 33 may be engaged with the rear stage portion 19b of the upper end of the vertical needle 10. In this way, the hook 33 supports the vertical needle 10 by the locking step portion 36 and / or the tip 33b.

[0016] The drive portion 34 uses an electromagnet and is a known one having a rear yoke 34a with folded portions at the upper and lower ends, an iron core 34b extending vertically from the folded portion above the yoke 34a to the vicinity of the tip of the hook 33, and a solenoid coil 34c wound around the iron core. In other words, by passing current through the solenoid coil, the iron core and the permanent magnet 33b repel each other, causing the hook 33 to rotate counterclockwise, as shown in Figure 3c, with the tip of the hook 33 protruding into the passage 31. On the other hand, by stopping the current to the solenoid coil, the hook 33 returns to its original position due to the attractive force of the permanent magnet 33b.

[0017] Returning to Figure 3a, the cassette 35 houses the hook 33 and the drive unit 34, and has a connector portion 35a at its upper end that is detachably connected to the housing of the lifting hook mechanism 30. Also, at the rear of the cassette 35, a support step portion 38 is formed to support the locking step portion 36 of the rear hook 33 when the hook 33 of the rear lifting hook mechanism is extended into the passage 31 and engaged with the hook 33. This support step portion 38 is inclined downward toward the rear. A protruding portion 35c is formed in the middle of the cassette 35, extending forward. The space formed by the front surface 35b and protruding portion 35c of the cassette 35, and the rear surface 35d of the front cassette 35, becomes the passage 31. The lower end of the front surface 35b of the cassette 35 is a front lower guide surface (inclined or curved surface) 35b1 that extends downward and backward, and the lower end of the rear surface 35d of the cassette 35 is a rear lower guide surface (inclined or curved surface) 35d1 that extends downward and forward. The front lower guide surface 35b1 is continuous with the passage 31, and the rear lower guide surface 35d1 is continuous with the passage 31 to the rear.

[0018] Because it is configured in this way, the warp thread selection control unit 1 of the jacquard loom operates as shown in Figure 4. Before operation, as shown in Figure 4a, the distance between the support guide mechanism 20 and the lifting hook mechanism 30 is at its shortest. The vertical needle 10 is supported by the support guide mechanism 20. Next, in order to form the upper opening, the hook 33 of the hook portion 32 corresponding to the selected predetermined vertical needle 10A is driven, as shown in Figure 4b. This causes the hook 33 to engage with the vertical needle 10A. Note that the reference numeral 10B in Figure 4b indicates an unengaged vertical needle. More specifically, as shown in Figure 5a, the tip 33b of the hook 33 and the upper rear portion 19b of the vertical needle 10A come into contact, and the vertical needle 10A is pushed slightly forward within the passage 31. Then, the upper front portion 19a of the vertical needle 10 (a part of the upper end of the vertical needle) comes into contact with the support step portion 38, or is positioned above the support step portion 38.

[0019] Next, after engaging the hooks 33 of each hook section 32 with each vertical needle 10A, the lifting hook mechanism 30 is raised relative to the support guide mechanism 20, as shown in Figure 4c. At this time, since only the vertical needles 10A are engaged with the lifting hook mechanism 30 in the previous step, the vertical needles 10A also rise. In other words, only the engaged vertical needles 10A rise relative to the support guide mechanism 20, while the unengaged vertical needles 10B remain on the support guide mechanism 20. At this time, the load on the vertical needles 10A is distributed not only to the hook section 32 in question but also to the adjacent hook section 32 in front of it. Therefore, the load on the hook section 32 can be reduced. Furthermore, when the lifting hook mechanism 30 is raised and the distance between the support guide mechanism 20 and the lifting hook mechanism is maximized (see Figure 4d), the shuttle opening O is formed. In other words, the upper opening O1 is formed by the warp threads connected to the engaged vertical needle 10A, and the lower opening O2 is formed by the warp threads connected to the unengaged vertical needle 10B.

[0020] After passing the shuttle through the opening O, as shown in Figure 4e, the lifting hook mechanism 30 is lowered relative to the support guide mechanism 20, and the vertical needle 10A is placed on the vertical needle holder 21 of the support guide mechanism 20. At the same time, the hook 33 is returned to the hook portion 32. At this time, the vertical needle 10 on the front side is moved slightly backward, and the front-to-back position of the vertical needle 10 returns to its original position. More specifically, as shown in Figure 5b, the vertical needle 10 is supported by the vertical needle holder 21 and moves slightly upward. At this time, the front surface 16a of the lower part 16 that protrudes forward from the upper part 11 of the vertical needle 10 comes into contact with the rear lower guide surface 35d1 of the rear surface 35d of the cassette 35 of the front hook portion 32, and the vertical needle 10 rises along its slope. As a result, the vertical needle 10 returns to its original position in Figure 4a. This allows the vertical needle 10 to be raised and lowered stably.

[0021] Thus, the warp selection control unit of the jacquard loom of the present invention can stably raise and lower the vertical needles 10 to form the shuttle opening O. Furthermore, since the load on the vertical needles 10 during raising and lowering can be distributed to the adjacent hook portion 32, it is less prone to malfunction.

[0022] In the warp thread selection control unit of the jacquard loom shown in Figure 1, the drive of the hook 33 of the hook portion 32 of the lifting hook mechanism 30 was carried out by a solenoid mechanism using an electromagnet. However, as long as the hook 33 of the hook portion 32 can engage with the vertical needle 10, the power source is not particularly limited and can be, for example, pneumatic control or hydraulic control. In the warp selection control unit of the jacquard loom shown in Figure 1, the upper front step portion 19a of the vertical needle 10 engages with the support step portion 38 of the front hook portion 32. However, as shown in Figure 5c, the tip of the hook 33 of the front hook portion 32 (for example, the engaging portion 36) may engage with the support step portion 38. In other words, the hook 33 acts as a bridge connecting the front and rear hook portions 32. The vertical needle 10 is not particularly limited as long as it is supported by the hook 33. The warp thread selection control unit of the jacquard loom in Figure 1 has an elongated hole that penetrates in the front-to-back direction at the top, but as shown in Figure 5d, it may also have a stepped portion 12A. In this case as well, the vertical needle 10 is pushed forward when the stepped portion comes into contact with the tip of the hook 33, and the upper front stepped portion 19a of the vertical needle 10 engages with the support stepped portion 38. [Explanation of symbols]

[0023] 1. Warp selection control unit for a jacquard loom 10 vertical needles 11 Top 11a Top front 11b Lower back 12 long hole 12a Top surface 12b Bottom side 15. Slope 16 Lower part 16a Lower front 16b Lower back 17 Engagement stepped portion 18 through holes 19 Top 19a Top front section 19b Upper end rear section 20 Support Guide Mechanism 21 Vertical needle holder 21a Support part 30 Lifting hook mechanism 31 aisle 32 Hook section 33 hooks 33a Fulcrum shaft 33b tip 34 Drive unit 34a Rear yoke 34b Iron core 34c solenoid coil 35 cassettes 35a Connector section 35b front 35b1 Front lower guide surface 35c protrusion 35d rear 35d1 Rear lower guide surface 36 Locking step 36a Top side 38 Support step

Claims

1. A warp thread selection control unit for a jacquard loom, comprising: a plurality of vertical needles arranged in a row; a support guide mechanism that supports and drives the plurality of vertical needles up and down; and a lifting hook mechanism that selectively engages with each vertical needle and moves up and down relative to the support guide mechanism, The aforementioned vertical needle has a hook engagement portion at its upper part. The lifting hook mechanism has a plurality of passages through which the upper part of the vertical needle passes, and a plurality of hook parts each having a hook that can be moved in and out of the passage, By extending the hook into the passage, the hook engages with the hook engagement portion of the vertical needle. When the hook and the hook engagement portion are engaged, the hook and / or a part of the vertical needle are supported by a support step formed on the adjacent hook portion. Warp thread selection control unit for a jacquard loom.

2. The hook engagement portion is a through hole that penetrates the upper part of the vertical needle in a single-line direction. The warp thread selection control unit for a jacquard loom according to claim 1.

3. The aforementioned support step is inclined upward in the direction in which the hook is extended. The warp thread selection control unit for a jacquard loom according to claim 1.

4. The vertical needle has an upper end that protrudes in the direction of extending the hook relative to the upper part, When the hook and the hook engaging portion are engaged, the upper end portion is supported by the support step portion. The warp thread selection control unit for a jacquard loom according to claim 1.

5. The aforementioned vertical needle is thicker in a linear direction from the upper part and has a lower part that protrudes from the upper part in the direction of extending the hook, The lower end of the adjacent hook section, on the side opposite to the direction in which the hook is extended, has a lower guide surface that extends downward in the direction in which the hook is extended. The lower guide surface of the adjacent hook portion is continuous with the passage. The warp thread selection control unit for a jacquard loom according to claim 1.

Images