weaving machine

Abstract

The object of the present invention is to provide a loom construction which makes the drive transmission mechanism that transmits the rotation of a motor to a drive shaft a construction that makes the twist of the drive shaft as small as possible, thereby being able to reduce the deviation of the phase in the device coupled to the drive shaft. The drive transmission mechanism includes a drive transmission shaft that extends in parallel with the drive shaft within the space of the side frame and protrudes from the side wall of the side frame and is coupled to the motor, and a transmission mechanism that couples the drive transmission shaft to the drive shaft, the transmission mechanism coupling the drive transmission shaft to the drive shaft at a position on the main shaft side in the width direction of the side frame than the coupling position of the drive shaft and the swing mechanism.

Description

Technical Field

[0001] The present invention relates to a loom comprising: a drive shaft connected to the main shaft of the loom and connected via a swing mechanism to a swing shaft for swinging a reed; an electric motor connected to the drive shaft via a drive transmission mechanism and rotatingly driving the drive shaft; a braking device that applies braking to the main shaft connected to the drive shaft; and a box-shaped side frame that houses the drive shaft and the swing shaft in an orientation such that the axial directions of the drive shaft and the swing shaft are aligned with the width direction. Background Technology

[0002] In the loom, the frame comprises a pair of side frames connected by multiple beam members. The loom also includes an electric motor as the main drive source, configured to drive the main shaft (main rotation shaft). This electric motor is located on one of the side frames. Furthermore, each side frame is box-shaped and has internal space.

[0003] Furthermore, a drive shaft, one end of which is connected to the main shaft, is housed within one of the aforementioned side frames. This drive shaft is driven by an electric motor, thereby rotating the main shaft connected to it. Moreover, the rotation of this drive shaft also serves to oscillate the reed. Specifically, an oscillating shaft for oscillating the reed is also housed within one of the aforementioned side frames, and this oscillating shaft is connected to the drive shaft via an oscillating mechanism such as a cam mechanism or a crank mechanism. Furthermore, the weaving mechanism is such that, along with rotating the drive shaft as described above, oscillating the oscillating shaft drives the reed, thereby oscillating it.

[0004] Furthermore, as a structure (drive transmission mechanism) that connects the drive shaft to the motor for rotational drive of the drive shaft as described above, there is, for example, the structure disclosed in Patent Document 1. In the structure disclosed in Patent Document 1, the end of the drive shaft opposite to the end connected to the main shaft (the other end) protrudes from the side wall outside the side frame.

[0005] Furthermore, although not described in Patent Document 1, in a typical loom, the motor driving the drive shaft is mounted on the outside of the side frame housing the drive shaft, supported by a bracket mounted on the side frame or the like. The motor and drive shaft are connected, for example, by pulleys mounted on the output shaft of the motor and the other end of the drive shaft, and a timing belt wound around the two pulleys. The loom also includes a braking device (e.g., an electromagnetic brake) for braking the main shaft connected to the drive shaft. Generally, this braking device is configured to be connected to the other end of the drive shaft and apply braking to the drive shaft to brake the main shaft.

[0006] Existing technical documents

[0007] Patent documents

[0008] Patent Document 1: Japanese Patent Application Publication No. 2004-107838 Summary of the Invention

[0009] The problem that the invention aims to solve

[0010] However, as described above, the drive shaft is connected to the main shaft at one end and to the swing mechanism in the middle. Furthermore, a device (e.g., an sheathing device) that uses the main shaft as a drive source is connected to the main shaft, and a weft-beating device is connected to the swing mechanism. Therefore, if the drive shaft is driven by a motor (especially at the start of driving), the load used to drive the aforementioned device acts as rotational resistance on the drive shaft at the location where the main shaft and swing mechanism are connected.

[0011] Therefore, in the structure of Patent Document 1, all the aforementioned rotational resistance is applied to the portion of the drive shaft at the shaft end (one end side) relative to the connection position (constraint point) connected to the motor side (drive transmission mechanism) (= the entire drive shaft). As a result, sometimes a large torsion occurs on the drive shaft. Moreover, if such a large torsion occurs, the phase of each device connected to the drive shaft, as described above, becomes delayed compared to the rotational phase of the motor that rotates the drive shaft. Consequently, deviations occur in weft insertion timing, shedding timing, etc., which adversely affect weaving.

[0012] Therefore, the object of the present invention is to provide a loom structure in which the drive transmission mechanism that transmits the rotation of the motor to the drive shaft is a structure that minimizes the torsion of the drive shaft, thereby reducing the phase deviation in the device connected to the drive shaft.

[0013] Solution for solving the problem

[0014] To achieve the above objectives, the present invention is characterized in that, in the above-described loom, the drive transmission mechanism includes: a drive transmission shaft that extends parallel to the drive shaft within the space of the side frame and is provided protruding from the side wall of the side frame and connected to a motor; and a transmission mechanism that connects the drive transmission shaft to the drive shaft, wherein the transmission mechanism connects the drive transmission shaft to the drive shaft at a position on the main shaft side in the width direction of the side frame, which is closer to the connection position between the drive shaft and the swing mechanism.

[0015] Furthermore, in such a loom of the present invention, the transmission mechanism may also be a gear train comprising a drive gear mounted on the drive transmission shaft and a driven gear mounted on the drive shaft. Additionally, the braking device may be connected to the drive transmission shaft in a manner that applies braking to the drive shaft via the drive transmission shaft. Moreover, the drive shaft may be a crank-shaped shaft with its middle portion formed as an eccentric portion relative to both sides, and the oscillating mechanism may be connected to the eccentric portion.

[0016] The effects of the invention are as follows.

[0017] According to the loom of the present invention, the drive transmission mechanism is configured such that the connection point between the drive transmission shaft connected to the electric motor and the drive shaft (the aforementioned constraint point) is closer to the main shaft side than the connection point between the drive shaft and the swing mechanism. Therefore, as described above, the rotational resistance acting on the drive shaft at two points acts at one location on each of the two shaft end sides (one end side and the other end side) of the drive shaft relative to the aforementioned constraint point. Thus, according to the loom of the present invention configured in this way, the rotational resistance acting on the portion of the drive shaft closer to the shaft end side than the aforementioned constraint point is smaller compared to the conventional structure, and therefore the torsion of the drive shaft is smaller than that of the conventional structure. This reduces the phase deviation caused by the torsion of the drive shaft.

[0018] Furthermore, in the loom of this invention, the transmission mechanism connecting the drive shaft and the drive transmission shaft is a gear train, thus the drive transmission mechanism configured in this way is advantageous in terms of maintenance. Specifically, a structure connecting the transmission mechanism via pulleys and a timing belt is also considered. However, in this case, operations such as adjusting the tension of the timing belt are required. In contrast, by making the transmission mechanism a gear train, such operations are unnecessary. Therefore, according to this structure, the drive transmission mechanism is advantageous in terms of maintenance.

[0019] Furthermore, in the loom of the present invention described above, the braking device is connected to the drive transmission shaft in such a way that it applies braking to the drive transmission shaft connected to the drive shaft, thereby reducing the torsion of the drive shaft when the main shaft is braked by the braking device.

[0020] In detail, if the drive shaft is braked as described above in order to brake the main shaft, the load (inertial force) used to stop the operation of the device connected to the drive shaft and the main shaft acts on the drive shaft at the connection position between the drive shaft, the main shaft, and the oscillating mechanism, in the same way as the aforementioned rotational resistance. Therefore, by constructing the loom in a way that brakes the drive transmission shaft connected to the drive shaft as described above, the load applied to the drive shaft during braking is reduced, and the torsion of the drive shaft is less than in existing structures. Furthermore, by reducing the torsion of the drive shaft during braking in this way, the load applied to the bearing supporting the drive shaft caused by the torsion of the drive shaft is also reduced, and as a result, damage to the bearing can be prevented as much as possible.

[0021] Furthermore, as described above, cam mechanisms and crank mechanisms exist as oscillating mechanisms in looms. However, applying the present invention to a loom where the drive shaft is a crank-shaped shaft, i.e., the oscillating mechanism is a crank mechanism, is more effective. Specifically, when a crank mechanism is used as the oscillating mechanism, since the drive shaft is a crank-shaped shaft with an eccentric portion, compared to a cam mechanism where the drive shaft is not an eccentric portion, the load applied to the drive shaft (the aforementioned rotational resistance) accompanying the oscillating drive of the reed easily causes shaft torsion. Therefore, looms where the oscillating mechanism is a crank mechanism are more effective in applying the present invention. Attached Figure Description

[0022] Figure 1 This is a front sectional view of a loom 1 according to one embodiment of the present invention.

[0023] Figure 2 yes Figure 1 A sectional view along line AA.

[0024] Explanation of symbols

[0025] 1—Loom, 5—Main shaft, 10—Frame, 12—Drive-side frame (side frame), 12a—Outer wall of drive-side frame, 12b—Inner wall of drive-side frame, 14—Frame body, 14a—Outer wall of frame body, 14b—Inner wall of frame body, 14c—Open part, 14d—Through hole, 14e—Protrusion, 16—Frame cover, 20—Motor, 22—Output shaft, 30—Drive shaft, 32—Eccentric part, 40—Weft-beating device, 42—Reed, 44—Rocker arm shaft, 50—Swing shaft, 60—Swing mechanism 62—Swing arm, 64—Connecting rod, 70—Coupling assembly, 72—Coupling assembly, 80—Drive transmission mechanism, 82—Drive transmission shaft, 84—Transmission mechanism, 84a—Drive gear, 84b—Driven gear, 90—Drive mechanism, 92—Drive gear train, 92a—Drive gear, 92b—Driven gear, 94—Drive gearbox, 94a—One side wall, 94a1—Outer side, 94b—Another side wall, 94c—Through hole, 94d—Through hole, 94e—Protrusion, 100—Oil seal, 110—Brake device. Detailed Implementation

[0026] The following is based on Figure 1 and Figure 2 An embodiment (example) of a loom in which the present invention is applied will be described.

[0027] In the loom 1, the frame 10 comprises a pair of box-shaped side frames 12, 12 connected by a plurality of beam members. The loom 1 also includes a motor 20, configured to drive the main shaft 5 of the loom 1. Furthermore, the motor 20 is located on one of the side frames 12 (hereinafter referred to as the "drive side frame") 12.

[0028] Furthermore, the drive-side frame 12 is composed of a frame body 14 as the main body and a frame cover 16 mounted on the frame body 14. Specifically, the frame body 14 is formed into a box shape with internal space, but is open in a shape where a portion of the side wall (outer wall portion) 14a, which is the outer side in the width direction of the loom 1 (the portion corresponding to the swing mechanism 60, etc., described below when viewed along the width direction), is open. The frame cover 16 is formed as a plate-like component, having a size capable of covering the open portion (opening portion) 14c of the frame body 14. The drive-side frame 12 is structured such that the frame cover 16 is mounted on the frame body 14 to cover the open portion 14c. Therefore, the side wall (outer wall) 12a of the drive-side frame 12, which is the outer side in the aforementioned width direction, is composed of the outer wall portion 14a of the frame body 14 and the frame cover 16 covering its open portion 14c. Furthermore, the frame cover 16 is mounted relative to the frame body 14 using threaded components such as bolts (not shown), and the frame cover 16 is detachable from the frame body 14.

[0029] Furthermore, the loom 1 includes a drive shaft 30 mounted between the electric motor 20 and the main shaft 5, which is driven by the electric motor 20 to rotate and drive the main shaft 5. The loom 1 also includes a swing shaft 50 for swinging the rocker arm shaft 44 in the weft insertion device 40, and a swing mechanism 60 connecting the swing shaft 50 to the drive shaft 30. In this embodiment, a crank mechanism is used as an example of the swing mechanism 60. The drive shaft 30, swing shaft 50, and swing mechanism 60 are arranged within the space of the drive side frame 12, within the opening 14c of the drive side frame 12 when viewed along the width direction. A detailed description of each structure in this loom 1 is as follows.

[0030] The drive shaft 30 is formed such that its dimension (length dimension) in the axial direction is larger than the dimension in the width direction of the drive side frame 12. However, the drive shaft 30 is formed as a crank-shaped shaft with its middle portion being an eccentric portion 32 that is eccentric to the portions (side portions) on both sides. Moreover, the drive shaft 30 is rotatably supported by bearings on the two side walls 12a, 12b of the drive side frame 12 with its axial direction aligned with the width direction, and is housed within the drive side frame 12 in this manner.

[0031] Furthermore, when viewing the drive-side frame 12 along the aforementioned width direction, the support position is such that the drive shaft 30 is located below the middle of the open portion 14c of the frame body 14. Moreover, the drive shaft 30 is supported at one end by the frame cover 16. Therefore, the drive shaft 30 is positioned such that the portion at its other end protrudes from the inner sidewall (inner wall portion) 14b of the frame body 14 in the aforementioned width direction. Furthermore, the drive shaft 30 is supported on the inner wall portion of the frame body 14 at a portion closer to the drive-side frame 12 than its protruding portion. Furthermore, the main shaft 5 is connected to the other end of the drive shaft 30 via a coupling member 70.

[0032] Similar to the drive shaft 30, the swing shaft 50 is formed as a shaft larger than the aforementioned width dimension of the drive-side frame 12. Furthermore, the swing shaft 50, in the same orientation as the drive shaft 30, is supported by bearings on the two side walls 12a, 12b of the drive-side frame 12 and housed within the drive-side frame 12. Moreover, when the drive-side frame 12 is viewed along the aforementioned width direction, this support position, like that of the drive shaft 30, is within the range of the open portion 14c of the frame body 14, and is positioned higher than that of the drive shaft 30. The swing shaft 50 is also supported at one end by the frame cover 16, and includes a portion at the other end that protrudes from the inner wall portion 14b of the frame body 14, supporting the inner wall portion 14b of the frame body 14 at its other end. Furthermore, at the other end of the swing shaft 50, a rocker arm shaft 44 with a support reed 42 is connected by a coupling member 72.

[0033] The swing mechanism 60, as described above, is a crank mechanism, comprising: a swing arm 62 that is not rotatably disposed relative to the swing shaft 50; and a connecting rod 64 serving as a link connecting the swing arm 62 to the eccentric portion 32 of the drive shaft 30. Furthermore, in the illustrated example, the swing shaft 50 and the swing arm 62 are formed as a single unit. The connecting rod 64 is rotatably connected to the swing arm 62 and the drive shaft 30 (eccentric portion 32) relative to them. Based on this, in this swing mechanism 60, the eccentric portion 32 rotates at a position eccentric to the axis from both sides of the drive shaft 30 by rotating the drive shaft 30, thereby swinging the swing arm 62 (swing shaft 50) connected to the eccentric portion 32 via the connecting rod 64. Therefore, in this structure, a portion of the drive shaft 30 also functions as the swing mechanism 60. Moreover, by swinging the swing shaft 50 in this way, the rocker arm shaft 44 connected to the swing shaft 50 and the reed 42 supported on the rocker arm shaft 44 swing, thereby performing the weft-beating action.

[0034] In the loom 1 described above, the loom 1 includes a drive transmission mechanism 80 that connects the drive shaft 30, which is connected to the motor 20, to the motor 20 for rotating and driving the drive shaft 30 connected to the main shaft 5. Based on this, in the present invention, the drive transmission mechanism 80 is configured to include a drive transmission shaft 82 connected to the motor 20, and a transmission mechanism 84 connecting the drive transmission shaft 82 to the drive shaft 30. Furthermore, this embodiment is an example where the transmission mechanism 84 is a gear train and the gear train is housed within the drive-side frame 12. The drive transmission mechanism 80 of this embodiment is described in detail below.

[0035] The drive transmission shaft 82 is formed such that its dimension (length dimension) in the axial direction is larger than the dimension in the width direction of the drive side frame 12 and larger than the length dimension of the drive shaft 30. Based on this, the drive transmission shaft 82 is configured such that, in an orientation parallel to the drive shaft 30, one end is supported by a bearing on the inner wall 12b of the drive side frame 12, and it extends through the outer wall portion 14a of the frame body 14 (the outer wall 12a of the drive side frame 12), with its other end located outwards from the outer wall portion 14a. Therefore, the drive transmission shaft 82 is housed within the drive side frame 12 for the portion supported by the bearing to the outer wall portion 14a. However, while the drive transmission shaft 82 is supported on the inner wall 12b at one end as described above, one end of it protrudes from the inner wall 12b in a manner that it is located outwards from the inner wall 12b. Based on this configuration, the drive transmission shaft 82 is connected to the drive shaft 30 within the drive side frame 12 by a transmission mechanism 84.

[0036] Furthermore, the support position of the drive transmission shaft 82 is outside the range of the open portion 14c in the frame body 14, and is a position separated downward relative to the drive shaft 30. In order to allow the drive transmission shaft 82 to pass through, a through hole 14d is formed in the outer wall portion 14a of the frame body 14 at a position corresponding to the support position.

[0037] Furthermore, in this embodiment, the transmission mechanism 84 is configured as a gear system comprising two gears housed within the drive-side frame 12. Specifically, the transmission mechanism 84 consists of a drive gear 84a and a driven gear 84b. The drive gear 84a is mounted on the drive transmission shaft 82 in a manner that prevents relative rotation with respect to the drive transmission shaft 82, and the driven gear 84b meshes with the drive gear 84a and is mounted on the drive shaft 30 in a manner that prevents relative rotation with respect to the drive shaft 30. However, the positions of the drive gear 84a and the driven gear 84b on their respective shafts are closer to the inner wall 12b of the drive-side frame 12 in the width direction than the connection position between the drive shaft 30 (eccentric portion 32) and the swing mechanism 60 (connecting rod 64). That is, in this embodiment, the drive transmission shaft 82 and the drive shaft 30 are connected at a position closer to the inner wall 12b of the drive-side frame 12 in the width direction than the connection position between the drive shaft 30 and the swing mechanism 60.

[0038] Furthermore, the drive transmission shaft 82 is connected at its other end to a drive mechanism 90 containing a motor 20, which is used to rotate the drive transmission shaft 82. In addition to the motor 20, the drive mechanism 90 also includes a drive gear train 92 that connects the output shaft 22 of the motor 20 to the drive transmission shaft 82. The drive mechanism 90 has a drive housing 94 that forms the base, with the motor 20 mounted on the outer surface of the drive housing 94 and the drive gear train 92 housed within it.

[0039] Furthermore, the drive housing 94 is configured such that a motor 20 is mounted on the outer surface 94a1 of one of the opposing side walls 94a and 94b, and these two side walls 94a and 94b are parallel to the outer side wall 12a of the drive side frame 12. Moreover, the drive housing 94 overlaps with the drive side frame 12 in the front-rear direction of the loom 1. Since the drive transmission shaft 82 protruding from the drive side frame 12, as described above, is connected to the drive gear train 92 housed within the drive housing 94, the drive transmission shaft 82 passes through the other side wall 94b of the pair of side walls 94a and 94b of the drive housing 94, with its other end portion located within the drive housing 94. Therefore, a through hole 94d is formed in the other side wall 94b of the drive housing 94 to allow the drive transmission shaft 82 to pass through.

[0040] Based on this, as described above, the drive transmission shaft 82 protruding from the drive-side frame 12 is supported at its other end by a bearing on a side wall 94a of the drive housing 94. However, the drive housing 94 is configured such that its other side wall 94b through which the drive transmission shaft 82 passes is separate from the drive-side frame 12.

[0041] The motor 20 is mounted to the drive housing 94 with bolts or the like (not shown) in a position separated upwards from the drive transmission shaft 82, which is supported as described above, with the output shaft 22 facing the drive-side frame 12. Furthermore, a through hole 94c is formed in one side wall 94a of the drive housing 94 at its mounting position, allowing the output shaft 22 of the motor 20 to pass through. Therefore, with the motor 20 mounted in the drive housing 94 as described above, its output shaft 22 extends along the width direction within the drive housing 94 and exists parallel to the drive transmission shaft 82. Based on this, the output shaft 22 is connected to the other end of the drive transmission shaft 82 within the drive housing 94 via the drive gear train 92.

[0042] The driving gear train 92 is the same as the gear train 84 that connects the drive shaft 30 and the drive transmission shaft 82, and consists of two gears. Specifically, the driving gear train 92 consists of a driving gear 92a and a driven gear 92b, wherein the driving gear 92a is mounted on the output shaft 22 of the motor 20 in a manner that prevents it from rotating relative to the output shaft 22, and the driven gear 92b meshes with the driving gear 92a and is mounted on the drive transmission shaft 82 in a manner that prevents it from rotating relative to the drive transmission shaft 82.

[0043] Furthermore, the loom 1 includes a braking device (e.g., an electromagnetic brake) 110 for braking the main shaft 5 connected to the drive shaft 30. The braking device 110 is configured to connect to the drive transmission shaft 82 at a position further inward in the width direction than the drive side frame 12. Therefore, for connection to the braking device 110, one end of the drive transmission shaft 82 protrudes from the inner wall 12b of the drive side frame 12. Based on this, the braking device 110 is mounted on the inner wall 12b of the drive side frame 12 and connected to one end of the protruding drive transmission shaft 82. Moreover, according to this structure, when the loom 1 (main shaft 5) brakes, the braking device 110 applies brakes to the drive transmission shaft 82, thereby braking the drive shaft 30 connected to the drive shaft 30 via the transmission mechanism 84 as described above, resulting in the cessation of rotation of the main shaft 5 connected to the drive shaft 30.

[0044] Furthermore, in the illustrated example, the frame body 14 has a protrusion 14e that protrudes from the outer wall portion 14a toward the drive housing 94 around the through hole 14d in its outer wall portion 14a. On the other hand, the drive housing 94 also has a protrusion 94e that protrudes from the other side wall 94b toward the drive-side frame 12 around the through hole 94d in its other side wall 94b. Moreover, the frame body 14 and the drive housing 94 are connected by their two protrusions 14e and 94e fitting together. Additionally, an oil seal 100 is provided in the space within the protrusions 14e and 94e between the inner circumferential surface of the protrusions 14e and 94e and the drive transmission shaft 82.

[0045] According to the loom 1 of this embodiment configured as described above, the drive transmission shaft 82 in the drive transmission mechanism 80 transmits the rotation of the motor 20 (output shaft 22) to the main shaft 5, is connected to the main shaft 5 and is driven by the motor 20 to rotate. One end of the drive transmission shaft 82 is housed in the drive side frame 12 and is connected to the drive shaft 30 within the drive side frame 12.

[0046] Based on this, the connection position between the drive transmission shaft 82 and the drive shaft 30 is located on the side of the main shaft 5 (the side of the connection position between the drive shaft 30 and the main shaft 5) relative to the connection position between the drive shaft 30 and the swing mechanism 60 in the aforementioned width direction, that is, on the side of the inner wall 12b of the drive side frame 12. Therefore, the connection position on the drive shaft 30 that connects to the drive transmission mechanism 80 (transmission mechanism 84) becomes a constraint point for the drive shaft 30. Regarding the connection positions with the swing mechanism 60 and the main shaft 5, one (the swing mechanism 60 side) is located on one shaft end side (one end side) relative to this constraint point, and the other (the main shaft 5 side) is located on the other shaft end side (the other end side). Therefore, the rotational resistance acting on the drive shaft 30 at the connection positions with the swing mechanism 60 and the main shaft 5 acts at one location on each of the two shaft end sides (one end side and the other end side) relative to the constraint point.

[0047] Furthermore, according to the loom 1 configured in this way, compared to the existing structure where all rotational resistance acts on one end of the shaft relative to the constraint point, the amount of torsion of the connection portion of the drive shaft 30 to the swing mechanism 60 and the connection portion to the main shaft 5 is reduced. As a result, in the device connected to the drive shaft 30, the phase deviation caused by the torsion of the drive shaft 30 is reduced compared to the existing structure.

[0048] Furthermore, in this loom 1, the braking device 110 is configured to apply brakes to the drive transmission shaft 82 connected to the drive shaft 30. Therefore, according to this structure, when the main shaft 5 is braked, the load (inertial force) applied to the drive shaft 30 at the connection point between the main shaft 5 and the swing mechanism 60 is the same as the aforementioned rotational resistance, acting at one of the two shaft ends relative to the aforementioned constraint point. Consequently, the amount of torsion in the drive shaft 30 caused by the load during braking of the main shaft 5 is also reduced in the same way as the amount of torsion caused by the aforementioned rotational resistance, thus minimizing bearing damage caused by the torsion of the drive shaft 30 during braking.

[0049] The above describes one embodiment of a loom using the present invention (hereinafter referred to as "the above embodiment"). However, the present invention is not limited to the structure described in the above embodiment, and can also be implemented in other embodiments (modifications) below.

[0050] (1) Regarding the transmission mechanism connecting the drive shaft and the drive transmission shaft, the transmission mechanism is not limited to the gear system consisting of two gears, a drive gear 84a and a driven gear 84b, housed within the drive-side frame 12 as described in the above embodiment. For example, the transmission mechanism may also be composed of a gear system, or a gear system consisting of three or more gears. Furthermore, the transmission mechanism is not limited to being composed of a gear system, and may also be configured to connect the pulley mounted on the drive shaft to the pulley mounted on the drive transmission shaft using a synchronous belt.

[0051] (2) Regarding the position where the drive shaft and the drive transmission shaft are connected using the transmission mechanism, the connection position (constraint point) is not limited to the position within the drive side frame of the above embodiment. For example, the drive shaft can be connected to the drive transmission shaft at a position outside the drive side frame (a position closer to the main shaft side in the width direction than the inner wall of the drive side frame) based on the fact that the drive transmission shaft is formed as a shaft that protrudes further towards the main shaft side than the inner wall of the drive side frame.

[0052] (3) Regarding the location of the braking device, in the above embodiment, the braking device 110 is provided on the inner side of the drive-side frame 12 in the width direction relative to the drive-side frame 12, in a manner connected to the drive transmission shaft 82. However, in this invention, the location of the braking device is not limited to the inner side relative to the drive-side frame, even when connected to the drive transmission shaft, and can also be on the outer side. Moreover, in this case, the braking device can be provided by mounting it on the outer wall of the drive-side frame or on the side wall of the drive housing.

[0053] Furthermore, the present invention is not limited to a structure in which the braking device is connected to the drive transmission shaft; the braking device may also be connected to the drive shaft. Moreover, regarding the configuration of the braking device, a braking shaft (braking shaft) that is different from the drive shaft and the drive transmission shaft and is connected to the drive shaft or the drive transmission shaft via a gear system or the like may be provided in the side frame, and the braking device may be provided in a manner connected to the braking shaft.

[0054] (4) Regarding the swing mechanism, the above embodiment is an example of applying the present invention to a loom employing a crank mechanism as the swing mechanism 60. Furthermore, in the above embodiment, the swing arm 62 and the swing shaft 50 in the swing mechanism 60 are integrally formed. However, even if the swing mechanism is a crank mechanism as described in the above embodiment, it can be configured such that the swing arm and swing shaft are separate components, but connected in a manner that prevents relative rotation. Furthermore, the swing mechanism is not limited to the crank mechanism of the above embodiment; it can also be a cam mechanism. In this case, the shaft on which the cam is mounted becomes the drive shaft as described in the present invention.

[0055] Furthermore, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

Claims

1. A loom comprising: a drive shaft connected to the main shaft of the loom and connected via a oscillating mechanism to an oscillating shaft for oscillating drive of a reed; an electric motor connected to the drive shaft via a drive transmission mechanism and rotatably driving the drive shaft; a braking device for braking the main shaft connected to the drive shaft; and a box-shaped side frame for housing the drive shaft and the oscillating shaft in an orientation such that the axial directions of the drive shaft and the oscillating shaft are aligned with the width direction. Its features are, The aforementioned drive transmission mechanism includes: a drive transmission shaft extending parallel to the drive shaft within the space of the side frame, protruding from the side wall of the side frame, and connected to the motor; and a transmission mechanism connecting the drive transmission shaft to the drive shaft. The position of the transmission mechanism between the connection position of the drive shaft and the swing mechanism in the width direction and between the connection position of the drive shaft and the main shaft connects the drive transmission shaft to the drive shaft.

2. The loom according to claim 1, characterized in that, The aforementioned transmission mechanism is a gear system comprising a drive gear mounted on the aforementioned drive transmission shaft and a driven gear mounted on the aforementioned drive shaft.

3. The loom according to claim 1 or 2, characterized in that, The aforementioned braking device is connected to the aforementioned drive transmission shaft in such a way that it applies braking to the aforementioned drive transmission shaft via the aforementioned drive transmission shaft.

4. The loom according to claim 2, characterized in that, The aforementioned drive shaft is a crank-shaped shaft in which the middle portion is formed as an eccentric portion relative to the two sides, and the aforementioned swing mechanism is connected to the aforementioned eccentric portion.

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