Patent Description:
In a loom, a frame includes a pair of side frames, and the side frames are connected by a plurality of beam materials. Further, the loom includes a driving motor as a main driving source, and is configured to drive the main shaft by the driving motor. The driving motor is provided on one side frame side of the pair of side frames. Each side frame has a housing shape and has a space inside thereof.

A driving shaft to which the main shaft is connected at one end thereof is accommodated in the one side frame. The driving shaft is rotationally driven by the driving motor, so that the main shaft connected to the driving shaft is rotationally driven. The rotation of the driving shaft is also for driving the reed to swing. Specifically, a swing shaft for driving the reed to swing is also accommodated in the one side frame, and the swing shaft is connected to the driving shaft via a swing mechanism such as a cam mechanism and a crank mechanism. As described above, the loom is configured such that the swing shaft is swing-driven as the driving shaft is rotationally driven, whereby the reed is driven to swing.

As described above, for example, the configuration (driving-force transmission mechanism) that connects the driving shaft and the driving motor for rotationally driving the driving shaft by the driving motor is disclosed in <CIT>. In the configuration disclosed in <CIT>, the driving shaft is provided such that an end (the other end) opposite to one end to which the main shaft is connected protrudes from the outer side wall of the side frame.

Although there is no description in <CIT>, in a general loom, the driving motor for rotationally driving the driving shaft is provided in a form of being supported by a bracket attached to the side frame or the like on the outside of the side frame which accommodates the driving shaft. The driving motor and the driving shaft are connected by, for example, a pulley attached to each of an output shaft of the driving motor and the other end of the driving shaft, and a timing belt hung on both pulleys. The loom includes a braking device (for example, an electromagnetic brake) for braking the main shaft connected to the driving shaft. In general, the braking device is connected to the other end of the driving shaft and is provided to apply a brake to the main shaft by apply a brake to the driving shaft. <CIT> discloses a multi-position front clutch for the drive unit of a weaving loom which allows to eliminated the use of a locking brake for the weaving devices. The multi-position clutch consisting of a pair of coaxial gearwheels which may be meshed together, one of which being fixed and the other axially movable. The axially fixed gearwheel of the clutch is connected to a motor for actuating the loom, while the axially movable gearwheel is connected to the weaving devices of the loom. The axially movable gearwheel also comprises a second set of teeth, opposite to that which forms the clutch, apt to engage with a toothed support integral with the loom when the clutch is in the disengaged position and vice versa.

As described above, the driving shaft is connected to the main shaft at one end thereof and to the swing mechanism at an intermediate portion thereof. A device (for example, an opening device) using the main shaft as a driving source is connected to the main shaft, and a beating device is connected to the swing mechanism. Therefore, when the driving shaft is rotationally driven by the driving motor, a load for driving those devices (especially at the start of driving) acts on the driving shaft as rotational resistance at a position where the main shaft and the swing mechanism are connected.

Therefore, in the configuration in <CIT>, all of the rotational resistance described above is applied to a portion (=entire driving shaft) of a shaft end side (one end side) with respect to a connection position (restraint point) connected to a driving motor side (driving-force transmission mechanism) in the driving shaft. As a result, a large twist may occur in the driving shaft. When such a large twist occurs, as described above, a phase of each device connected to the driving shaft is in a delayed state as compared with a rotational phase of the driving motor for rotationally driving the driving shaft. Therefore, beating timing, opening timing, or the like is also deviated, and as a result, the weaving is adversely affected.

Therefore, an object of the present invention is to provide a structure of a loom in which a deviation of a phase can be reduced in a device connected to a driving shaft by configuring a driving-force transmission mechanism that transmits rotation of a driving motor to the driving shaft to reduce a twist of the driving shaft as small as possible.

To achieve the above object, the present invention provides the loom as described above, in which the driving-force transmission mechanism includes a driving-force transmission shaft that is provided so as to protrude from a side wall of a side frame while extending parallel to the driving shaft within a space of the side frame and connected to the driving motor, and a transmission mechanism that connects the driving-force transmission shaft and the driving shaft. The transmission mechanism connects the driving-force transmission shaft and the driving shaft at a position on a main shaft side in a width direction of the side frame from a connection position between the driving shaft and the swing mechanism.

In such a loom according to the present invention, the transmission mechanism may be a gear train including a driving gear attached to the driving-force transmission shaft and a driven gear attached to the driving shaft. The braking device may be connected to the driving-force transmission shaft to apply a brake to the driving shaft via the driving-force transmission shaft. The driving shaft may be a crank-shaped shaft formed as an eccentric portion of which an intermediate portion is eccentric with respect to both side portions, and the swing mechanism may be connected to the eccentric portion. describes a weaving machine transmission mechanism includes a main shaft driven by a drive motor, a beating mechanism transmission shaft and an opening mechanism input shaft respectively connected to the main shaft, a drive mechanism for controlling the axial movement of the main shaft, the stopper for stopping the driving shaft of the beating mechanism. The main shaft is axially slidably arranged in the box. The output shaft of the drive motor, the driving shaft of the beating mechanism, and the input shaft of the opening mechanism are respectively provided with a driving gear and a beating mechanism. The weft drive gear and the open drive gear are characterized in that the main shaft is a double gear shaft provided with a first gear and a second gear at the front and rear ends, respectively; Under the action of the driving mechanism, the second gear is meshed with the beating driving gear and the opening driving gear at the same time, or the second gear is only meshing with the opening driving gear; and the first gear is always meshing with the driving gear.

According to the loom according to the present invention, the driving-force transmission mechanism is configured such that the connection position (restraint point) between the driving-force transmission shaft connected to the driving motor and the driving shaft is on the main shaft side with respect to the connection position with the swing mechanism in the driving shaft. Therefore, as described above, the rotational resistance acting on the driving shaft at two locations acts at one location on each portion on both shaft end sides (one end side and the other end side) with respect to the restraint point in the driving shaft. Therefore, according to the loom of the present invention configured as described above, the rotational resistance acting on the portion of the driving shaft on the shaft end side from the restraint point is smaller than that of the configuration of the related art. Therefore, the twist of the driving shaft is also smaller than that of the configuration of the related art. Thereby, the above-mentioned phase deviation due to the twist of the driving shaft can be reduced.

In such a loom according to the present invention, the transmission mechanism that connects the driving shaft and the driving-force transmission shaft is the gear train, so that the driving-force transmission mechanism configured as described above is advantageous in terms of maintenance. Specifically, as the configuration of the transmission mechanism, it is conceivable that the transmission mechanism is connected via a pulley and a timing belt. However, in that case, an operation such as adjusting the tension of the timing belt is required. On the other hand, by using the gear train as the transmission mechanism, such an operation is not required. Therefore, according to the configuration, the driving-force transmission mechanism is advantageous in terms of maintenance.

In the loom according to the present invention described above, the braking device may be connected to the driving-force transmission shaft to apply a brake to the driving-force transmission shaft connected to the driving shaft. Therefore, the twist of the driving shaft can also be reduced when applying the brake to the main shaft by the braking device.

Specifically, as described above, when applying the brake to the driving shaft to apply the brake to the main shaft, similar to the rotational resistance described above, the load (inertia force) for stopping the operation of the driving shaft and the device connected to the main shaft acts on the driving shaft at the connection position between the driving shaft, the main shaft, and the swing mechanism. Therefore, as described above, by adopting a loom configuration that applies the brake to the driving-force transmission shaft connected to the driving shaft, the load applied to the driving shaft during braking is reduced, and the twist of the driving shaft also becomes small compared with that of the configuration of the related art. The twist of the driving shaft during braking is reduced so that the load applied on the bearing supporting the driving shaft due to the twist of the driving shaft is also reduced. As a result, damage of the bearing can be prevented as much as possible.

As the swing mechanism in the loom, as described above, there are a cam mechanism and a crank mechanism, but it is more effective that the present invention is applied to the loom in which the driving shaft is the crank-shaped shaft, that is, the swing mechanism is the crank mechanism. Specifically, in a case where the crank mechanism is adopted as the swing mechanism, since the driving shaft is the crank-shaped shaft having the eccentric portion, the shaft is likely to be twisted by the load (rotational resistance) applied to the driving shaft due to the swing driving of the reed compared with that of a case of the cam mechanism in which the driving shaft is a shaft having no eccentric portion. Therefore, the loom in which the swing mechanism is the crank mechanism is more effective in applying the present invention.

Hereinafter, an embodiment (example) of a loom to which the present invention is applied will be described with reference to <FIG> and <FIG>.

In a loom <NUM>, a frame <NUM> includes a pair of housing-shaped side frames <NUM> and <NUM>, and the side frames <NUM> are connected by a plurality of beam materials. The loom <NUM> includes a driving motor <NUM>, and is configured to drive a main shaft <NUM> of the loom <NUM> by the driving motor <NUM>. The driving motor <NUM> is provided on one side frame <NUM> (hereinafter, referred to as "driving-side frame") side of the pair of side frames <NUM> and <NUM>.

The driving-side frame <NUM> is configured of a frame body <NUM> that is a main portion, and a frame cover <NUM> attached to the frame body <NUM>. Specifically, the frame body <NUM> is formed in a housing shape having a space therein, and a portion (portion corresponding to a swing mechanism <NUM> or the like described later in a width direction) in a side wall (outer wall portion) 14a, which is an outside in the width direction of the loom <NUM>, is open. The frame cover <NUM> is a member formed in a plate shape, and has a size capable of covering an opened portion (opening portion) 14c of the frame body <NUM>. The driving-side frame <NUM> is configured such that the frame cover <NUM> is attached to the frame body <NUM> in a form of covering the opening portion 14c. Therefore, the side wall (outer wall) 12a of the driving-side frame <NUM> that is the outside in the width direction is configured of the outer wall portion 14a of the frame body <NUM> and the frame cover <NUM> that covers the opening portion 14c thereof. The frame cover <NUM> is attached to the frame body <NUM> by using screw members (not illustrated) such as bolts, and the frame cover <NUM> can be attached or detached to or from the frame body <NUM>.

The loom <NUM> includes a driving shaft <NUM> which is interposed between a driving motor <NUM> and a main shaft <NUM>, is rotationally driven by the driving motor <NUM>, and rotationally drives the main shaft <NUM>. The loom <NUM> includes a swing shaft <NUM> for driving a locking shaft <NUM> to swing in a beating device <NUM>, and a swing mechanism <NUM> for connecting the swing shaft <NUM> and the driving shaft <NUM>. The present example is an example in which a crank mechanism is adopted as the swing mechanism <NUM>. The driving shaft <NUM>, the swing shaft <NUM>, and the swing mechanism <NUM> are disposed to be located within a range of the opening portion 14c in the driving-side frame <NUM> as viewed in the width direction, and are accommodated in the space within the driving-side frame <NUM>. Details of each configuration in such a loom <NUM> are as follows.

The driving shaft <NUM> is formed as a shaft having a dimension (length dimension) in an axial direction, which is larger than a dimension of the driving-side frame <NUM> in the width direction. However, the driving shaft <NUM> is a crank-shaped shaft formed as an eccentric portion <NUM> of which an intermediate portion is eccentric with respect to portions of both sides (both-side portions). The driving shaft <NUM> is rotatably supported by both side walls 12a and 12b of the driving-side frame <NUM> via bearings in an orientation in which the axial direction matches with the width direction, and is accommodated in the driving-side frame <NUM> in such a form.

The support position is located such that the driving shaft <NUM> is located below an intermediate portion in the opening portion 14c in the frame body <NUM> when the driving-side frame <NUM> is viewed in the width direction. The driving shaft <NUM> is supported by the frame cover <NUM> at one end thereof in one end side. Therefore, the driving shaft <NUM> is in a state where a portion including the other end is provided in a form of protruding, on the other end side, from an inner wall (inside wall portion) 14b of the frame body <NUM> in the width direction. The driving shaft <NUM> is supported by the inner wall portion of the frame body <NUM> at a portion on the driving-side frame <NUM> side from the protruding portion. The main shaft <NUM> is connected to the other end of the driving shaft <NUM> by a coupling member <NUM>.

Similar to the driving shaft <NUM>, the swing shaft <NUM> is formed as a shaft of which a dimension is larger than the dimension of the driving-side frame <NUM> in the width direction. Similar to the driving shaft <NUM>, the swing shaft <NUM> is supported by the both side walls 12a and 12b of the driving-side frame <NUM> via bearings in the orientation parallel to the driving shaft <NUM>, and is accommodated in the driving-side frame <NUM>. Similar to the driving shaft <NUM>, the support position is a position within the range of the opening portion 14c in the frame body <NUM> when the driving-side frame <NUM> is viewed in the width direction, and is a position above the driving shaft <NUM>. The swing shaft <NUM> is also supported by the frame cover <NUM> at one end thereof, a portion including the other end is provided so as to protrude from the inner wall portion 14b of the frame body <NUM>, and is supported by the inner wall portion 14b of the frame body <NUM> at the other end side thereof. A locking shaft <NUM> that supports the reed <NUM> is connected to the other end of the swing shaft <NUM> by a coupling member <NUM>.

As described above, the swing mechanism <NUM> is the crank mechanism and includes a swing arm <NUM> which is provided so as not to rotate relative to the swing shaft <NUM>, and a connection lever <NUM> which is a link for connecting the swing arm <NUM> and the eccentric portion <NUM> of the driving shaft <NUM>. In the illustrated example, the swing shaft <NUM> and the swing arm <NUM> are integrally formed. The connection lever <NUM> is relatively rotatably connected to the swing arm <NUM> and the driving shaft <NUM> (eccentric portion <NUM>). In the swing mechanism <NUM>, the driving shaft <NUM> is rotationally driven and the eccentric portion <NUM> is rotationally moved at a position eccentric from a shaft center of both side portions, and thereby the swing arm <NUM> (swing shaft <NUM>) connected to the eccentric portion <NUM> via the connection lever <NUM> is driven to swing. Therefore, in that configuration, a part of the driving shaft <NUM> also functions as the swing mechanism <NUM>. As described above, the swing shaft <NUM> is driven to swing, and thereby the locking shaft <NUM> connected to the swing shaft <NUM> and the reed <NUM> supported by the locking shaft <NUM> move to swing, and the beating operation is performed.

In the loom <NUM> described above, the loom <NUM> includes a driving-force transmission mechanism <NUM> that connects the driving shaft <NUM> and the driving motor <NUM>. Therefore, the driving shaft <NUM> connected to the main shaft <NUM> is rotationally driven by the driving motor <NUM>. In the present invention, the driving-force transmission mechanism <NUM> is configured to include a driving-force transmission shaft <NUM> connected to the driving motor <NUM> and a transmission mechanism <NUM> connecting the driving-force transmission shaft <NUM> and the driving shaft <NUM>. The present example is an example in which the transmission mechanism <NUM> is a gear train and the gear train is accommodated in the driving-side frame <NUM>. Details of the driving-force transmission mechanism <NUM> of the present example are as follows.

The driving-force transmission shaft <NUM> is formed as a shaft of which a dimension (length dimension) in the axial direction is larger than the dimension of the driving-side frame <NUM> in the width direction and is larger than the length dimension of the driving shaft <NUM>. The driving-force transmission shaft <NUM> is provided to be supported by the inner wall 12b of the driving-side frame <NUM> via a bearing on one end side thereof in the orientation parallel to the driving shaft <NUM>, and penetrate the outer wall portion 14a (outer wall 12a of the driving-side frame <NUM>) of the frame body <NUM>, and the other end thereof is located on the outside of the outer wall portion 14a. Therefore, the driving-force transmission shaft <NUM> is in a state where a portion between the portion supported by the bearing and the outer wall portion 14a is accommodated within the driving-side frame <NUM>. However, as described above, although the driving-force transmission shaft <NUM> is supported by the inner wall 12b on the one end side, the driving-force transmission shaft <NUM> also protrudes from the inner wall 12b so that the one end is located on the outside of the inner wall 12b. The driving-force transmission shaft <NUM> provided as described above is connected to the driving shaft <NUM> by the transmission mechanism <NUM> within the driving-side frame <NUM>.

The support position of the driving-force transmission shaft <NUM> is a position outside the range of the opening portion 14c in the frame body <NUM>, and is a position separated downward from the driving shaft <NUM>. In the outer wall portion 14a of the frame body <NUM>, a through hole 14d is formed at a position corresponding to the support position to allow the driving-force transmission shaft <NUM> to penetrate as described above.

In the present example, the transmission mechanism <NUM> is configured as a gear train including two gears accommodated within the driving-side frame <NUM>. Specifically, the transmission mechanism <NUM> is configured of a driving gear 84a attached so as not to rotate relative to the driving-force transmission shaft <NUM>, and a driven gear 84b that meshes with the driving gear 84a and is attached so as not to rotate relative to the driving shaft <NUM>. However, the position where the driving gear 84a and the driven gear 84b are attached to each shaft is a position on the inner wall 12b side of the driving-side frame <NUM> in the width direction from the connection position between the driving shaft <NUM> (eccentric portion <NUM>) and the swing mechanism <NUM> (connection lever <NUM>). That is, in the present example, the driving-force transmission shaft <NUM> and the driving shaft <NUM> are connected at a position on the inner wall 12b side of the driving-side frame <NUM> in the width direction from the connection position between the driving shaft <NUM> and the swing mechanism <NUM>.

The driving-force transmission shaft <NUM> is a driving mechanism <NUM> for rotationally driving the driving-force transmission shaft <NUM> on the other end side, and is connected to the driving mechanism <NUM> including the driving motor <NUM>. In addition to the driving motor <NUM>, the driving mechanism <NUM> includes a driving gear train <NUM> that connects the output shaft <NUM> of the driving motor <NUM> and the driving-force transmission shaft <NUM>. The driving mechanism <NUM> is configured to have a housing-shaped driving box <NUM> as a base, the driving motor <NUM> is attached to the outer surface of the driving box <NUM>, and the driving gear train <NUM> is accommodated within the driving box <NUM>.

In the driving box <NUM>, the driving motor <NUM> is attached to an outer surface 94a1 of one side wall 94a of the pair of side walls 94a and 94b facing each other, and the both side walls 94a and 94b are provided to be parallel to the outer wall 12a of the driving-side frame <NUM>. The driving box <NUM> is provided to overlap the driving-side frame <NUM> in the back and forth direction of the loom <NUM>. As described above, since the driving-force transmission shaft <NUM> protruding from the driving-side frame <NUM> is connected to the driving gear train <NUM> accommodated within the driving box <NUM>, the driving-force transmission shaft <NUM> penetrates the other side wall 94b of the pair of side walls 94a and 94b in the driving box <NUM>, and the portion of the other end side is located within the driving box <NUM> (accommodated in the driving box <NUM>). Therefore, a through hole 94d that allows the penetration of the driving-force transmission shaft <NUM> is formed on the other side wall 94b in the driving box <NUM>.

As described above, the driving-force transmission shaft <NUM> protruding from the driving-side frame <NUM> is supported by one side wall 94a in the driving box <NUM> via a bearing at the other end. However, the driving box <NUM> is provided such that the other side wall 94b through which the driving-force transmission shaft <NUM> penetrates is separated from the driving-side frame <NUM>.

The driving motor <NUM> is attached to the driving box <NUM> by bolts or the like (not illustrated) such that the output shaft <NUM> is oriented toward the driving-side frame <NUM> side at a position separated upward with respect to the driving-force transmission shaft <NUM> supported as described above. A through hole 94c is formed on one side wall 94a in the driving box <NUM> to which the driving motor <NUM> is attached to allow the output shaft <NUM> of the driving motor <NUM> to penetrate at the attachment position. Therefore, as described above, in a state where the driving motor <NUM> is attached to the driving box <NUM>, the output shaft <NUM> extends within the driving box <NUM> in the width direction and exists to be parallel to the driving-force transmission shaft <NUM>. The output shaft <NUM> is connected to a portion of the driving-force transmission shaft <NUM> on the portion of the other end side of via the driving gear train <NUM> within the driving box <NUM>.

Similar to the gear train <NUM> connecting the driving shaft <NUM> and the driving-force transmission shaft <NUM>, the driving gear train <NUM> is configured of two gears. Specifically, the driving gear train <NUM> is configured of a driving gear 92a that is attached so as not to rotate relative to the output shaft <NUM> of the driving motor <NUM>, and a driven gear 92b that meshes with the driving gear 92a and is attached so as not to rotate relative to the driving-force transmission shaft <NUM>.

The loom <NUM> includes a braking device (for example, an electromagnetic brake) <NUM> for applying a brake to the main shaft <NUM> connected to the driving shaft <NUM>. The braking device <NUM> is provided so as to be connected to the driving-force transmission shaft <NUM> at a position inside from the driving-side frame <NUM> in the width direction. Therefore, the driving-force transmission shaft <NUM> is provided such that one end thereof protrudes from the inner wall 12b of the driving-side frame <NUM> for connection with the braking device <NUM>. The braking device <NUM> is attached to the inner wall 12b of the driving-side frame <NUM> and is connected to one end of the protruding driving-force transmission shaft <NUM>. According to such a configuration, when the loom <NUM> (main shaft <NUM>) is braked, the driving-force transmission shaft <NUM> is braked by the braking device <NUM>, so that the brake is applied to the driving shaft <NUM> connected via transmission mechanism <NUM> as described above. As a result, the rotation of the main shaft <NUM> which is connected to the driving shaft <NUM> is stopped.

In the illustrated example, the frame body <NUM> has a protruding portion 14e formed to protrude from the outer wall portion 14a toward the driving box <NUM> side around the through hole 14d in the outer wall portion 14a. On the other hand, the driving box <NUM> also has a protruding portion 94e formed to protrude from the other side wall 94b toward the driving-side frame <NUM> side around the through hole 94d in the other side wall 94b. The frame body <NUM> and the driving box <NUM> are connected such that the both protruding portions 14e and 94e are fitted to each other. In spaces inside the protruding portions 14e and 94e, oil seals <NUM> are provided between inner peripheral surfaces of the protruding portions 14e and 94e, and the driving-force transmission shaft <NUM>.

According to the loom <NUM> of the present example configured as described above, the driving-force transmission shaft <NUM> in the driving-force transmission mechanism <NUM>, which transmits the rotation of the driving motor <NUM> (output shaft <NUM>) to the main shaft <NUM>, and is connected to the main shaft <NUM> and rotationally driven by the driving motor <NUM>, is configured such that the one end side portion is accommodated in the driving-side frame <NUM> and connected to the driving shaft <NUM> within the driving-side frame <NUM>.

The connection position between the driving-force transmission shaft <NUM> and the driving shaft <NUM> is the position on the inner wall 12b side of the driving-side frame <NUM> which is the main shaft <NUM> side (connection position side between the driving shaft <NUM> and the main shaft <NUM>) with respect to the connection position between the driving shaft <NUM> and the swing mechanism <NUM> in the width direction. Therefore, on the driving shaft <NUM>, the connection position with the driving-force transmission mechanism <NUM> (transmission mechanism <NUM>) becomes a restraint point of the driving shaft <NUM>. In the connection position with the swing mechanism <NUM> and the connection position with the main shaft <NUM>, one (swing mechanism <NUM> side) is located on one shaft end side (one end side) with respect to the restraint point, and the other (main shaft <NUM> side) is located on the other shaft end side (the other end side). Therefore, the rotational resistance acting on the driving shaft <NUM> at the connection position with the swing mechanism <NUM> and the connection position with the main shaft <NUM> acts at one place on each of the both end sides (one end side and the other end side) of the shaft with respect to the restraint point.

According to the loom <NUM> configured as described above, each amount of twist at the connection portion with the swing mechanism <NUM> and the connection portion with the main shaft <NUM> in the driving shaft <NUM> is reduced compared with that of the configuration of the related art in which all the rotational resistance acts on one end side of the shaft with respect to the restraint point. As a result, the phase deviation occurred due to the twist of the driving shaft <NUM> in the device connected to the driving shaft <NUM> becomes small compared with that of the configuration of the related art.

In the loom <NUM>, a braking device <NUM> is provided to apply a brake to the driving-force transmission shaft <NUM> connected to the driving shaft <NUM>. Therefore, according to the configuration, when the main shaft <NUM> is braked, the load (inertia force) applied to the connection position between the main shaft <NUM> and the swing mechanism <NUM> in the driving shaft <NUM> acts at one place on each of the both end sides of the shaft with respect to the restraint point similar to the rotational resistance described above. Therefore, the amount of twist of the driving shaft <NUM> due to the load when the main shaft <NUM> is braked becomes small similar to the amount of twist due to the rotational resistance described above, and damage of the bearing due to the twist of the driving shaft <NUM> during braking can be prevented as much as possible.

In the above, one embodiment (hereinafter, referred to as "the above example") of the loom to which the present invention is applied is described. However, the present invention is not limited to the configuration described in the above example, and can be implemented in other embodiments (modified examples) as described below.

Claim 1:
A loom (<NUM>) comprising:
a driving shaft (<NUM>) to which a main shaft (<NUM>) of the loom (<NUM>) is connected and to which a swing shaft (<NUM>) for driving a reed (<NUM>) to swing is connected via a swing mechanism (<NUM>);
a driving motor (<NUM>) to which the driving shaft (<NUM>) is connected via a driving-force transmission mechanism (<NUM>) to rotationally drive the driving shaft (<NUM>);
a braking device (<NUM>) that applies a brake to the main shaft (<NUM>) connected to the driving shaft (<NUM>); and
a housing-shaped side frame (<NUM>) that accommodates the driving shaft (<NUM>) and the swing shaft (<NUM>) in an orientation in which each axial direction of the driving shaft (<NUM>) and the swing shaft (<NUM>) matches with a width direction, characterized in that
the driving-force transmission mechanism (<NUM>) includes a driving-force transmission shaft (<NUM>) that is provided so as to protrude from a side wall (12b) of the side frame (<NUM>) while extending parallel to the driving shaft (<NUM>) within a space of the side frame (<NUM>) and connected to the driving motor (<NUM>), and a transmission mechanism (<NUM>) that connects the driving-force transmission shaft (<NUM>) and the driving shaft (<NUM>), and
the transmission mechanism (<NUM>) connects the driving-force transmission shaft (<NUM>) and the driving shaft (<NUM>) at a position on a main shaft (<NUM>) side in the width direction from a connection position between the driving shaft (<NUM>) and the swing mechanism (<NUM>).