Patent Description:
A loom has a shaft (driving shaft) of which one end is connected a main shaft and which is rotationally driven by a driving motor. In a general loom, the driving shaft is accommodated in one of a pair of side frames in a frame of the loom. 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, 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 a configuration that is disclosed in <CIT> (hereinafter, referred to as the "configuration of the related art"), an intermediate shaft, which is connected to the driving motor by a pulley and a timing belt, is provided between the driving shaft to which a swing mechanism is connected and the driving motor. The intermediate shaft and the driving shaft are connected by a gear train.

The loom includes an opening device that displaces a heddle frame in a vertical direction in order to give an opening motion to the warps. The opening device is provided in a form of being connected to the driving shaft so as to use the driving motor as a driving source, except for a type driven by a dedicated motor. Therefore, in such a loom, the driving motor and the opening device are connected to the driving shaft. However, in the configuration of the related art, the opening device is connected to the intermediate shaft connected to the driving motor in the form described above. That is, in the configuration of the related art, the driving motor and the opening device are connected to the driving shaft via the intermediate shaft and a gear train.

The loom includes a braking device for applying a brake to the main shaft. In the configuration of the related art, the braking device is connected to the other end of the driving shaft and is configured 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. <CIT> describes a weaving machine transmission mechanism including a main shaft driven by a drive motor, a beating mechanism driving shaft and an opening mechanism input shaft respectively connected to the main shaft, a driving mechanism for controlling the axial movement of the main shaft, and a beating mechanism.

As described above, in the configuration of the related art in which the braking device is connected to an end of the driving shaft, when the brake is applied to the driving shaft to apply the brake to the main shaft, a braking force that tries to stop the rotation acts on the intermediate shaft via the gear train. When the brake is applied to the intermediate shaft as described above, the brake is also applied to the driving motor connected to the intermediate shaft and the opening device. Therefore, an inertia force due to the brake of the driving motor and the opening device acts on the intermediate shaft. Therefore, in the gear train that connects the driving shaft to which the brake is applied and the intermediate shaft that tries to rotate against the braking force by the action of the inertia force, a load corresponding to the inertia force is applied to a meshing portion between a gear on a driving shaft side and a gear on an intermediate shaft side. As a result, the gear train may be damaged.

In a case where a width dimension of the heddle frame is large as in that of a wide loom, in a case where the number of heddle frames mounted on the loom or used for weaving is large, or the like, the inertia force due to the brake of the opening device is further increased. Since the driving force of the driving motor that drives the opening device is also further increased, the inertia force in accordance with the brake of the driving motor is also further increased. Therefore, in such a case, the load applied to the gear train is further increased as described above during braking by the braking device, so that the damage thereof or the like is more likely to occur.

As a connection configuration for connecting the driving shaft and the intermediate shaft, a combination of a pulley and a timing belt can be considered in addition to the gear train. However, even in the case of the configuration, since the intermediate shaft is rotated by the inertia force with respect to the braked driving shaft, a load corresponding to the inertia force is applied to the timing belt connecting the driving shaft and the intermediate shaft. As a result, the timing belt may be damaged or the like.

Therefore, an object of the present invention is to provide a structure of a loom in which damage of the above-mentioned connection configuration can be prevented as much as possible during braking by a braking device.

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 the side frame while extending parallel to the driving shaft within a space of the side frame, where the driving-force transmission shaft is connected to the driving motor, and where the driving-force transmission shaft is connected to the opening device, and a transmission mechanism that connects the driving-force transmission shaft and the driving shaft, and the braking device is connected to the driving transmission shaft so as to directly apply a brake to the driving-force transmission shaft.

According to the loom according to the present invention, by the configuration, a load applied to the connection configuration that connects the driving shaft and the driving-force transmission shaft is small during braking by the braking device. More specifically, during the braking, the brake is applied to the driving shaft and the driving transmission shaft. Therefore, an inertia force due to the brake of connected configuration elements acts on each of the driving shaft and the driving transmission shaft. As described above, the driving-force transmission shaft is connected to the driving motor and the opening device as the configuration elements. The driving shaft is connected to the main shaft, a beating device, and the like as the configuration elements.

As in the configuration of the related art or the configuration according to the present invention, in a case of a configuration in which one or more configuration elements are connected to each other and the braking device is connected to one of two shafts connected to each other by the connection configuration, a brake is directly applied to one shaft (braking shaft) by the braking device, and thereby the other shaft (braked shaft) receives the braking force via the connection configuration. In other words, the connection configuration becomes a portion acting the braking force by the braking shaft on the braked shaft.

The inertia force due to the configuration elements acting on each shaft as the brake is applied to each shaft naturally acts in a rotational direction of the shaft. Therefore, on the braking shaft side, the inertia force acts in a direction of weakening the braking force of the braking device. Therefore, the braking force, which is acted on the connection configuration by the braking shaft, is a force weakened by the inertia force acting on the braking shaft side by the braking force that the braking device tries to act on the braking shaft. On the other hand, the inertia force acting on the braked shaft is a force against the braking force (braking force that the braking shaft acts on the connection configuration) that the braked shaft receives from the connection configuration. Therefore, the greater the inertia force acting on the braking shaft (the smaller the braking force that braking shaft acts on the connection configuration), the smaller load is applied to the connection configuration. In addition, the greater the inertia force acting on the braked shaft, (the greater the force against the braking force received from the connection configuration), the greater the load is applied to the connection configuration.

In the loom, during the braking, the inertia force acting on the shaft (driving transmission shaft) by the driving motor and the opening device is generally greater than the inertia force acting on the shaft (driving shaft) by the main shaft, the beating device, or the like. Therefore, compared with the configuration of the related art in which the driving shaft is the braking shaft, the load applied to the connection configuration during the braking is small in the configuration of the present invention in which the driving-force transmission shaft is the braking shaft. Therefore, according to the present invention, damage to the connection configuration is prevented as much as possible.

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 configured to be 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 (inner 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>. 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>. A braking device <NUM> included in the loom <NUM> to apply a brake to the main shaft <NUM> is provided to apply a direct brake to the driving-force transmission shaft <NUM>. An opening device <NUM> that reciprocates a heddle frame (not illustrated) in a vertical direction uses the driving motor <NUM> as a driving source, and is connected to the driving-force transmission shaft <NUM> which is connected to the driving motor <NUM>. Details of the loom <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>. 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 driving mechanism <NUM> includes an opening shaft <NUM> to which the opening device <NUM> in the loom <NUM> is connected, and an opening gear train <NUM> that connects the driving-force transmission shaft <NUM> and the opening shaft <NUM>. The opening 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 box <NUM> in the width direction. The opening shaft <NUM> is supported by both side walls 94a and 94b of the driving box <NUM> via bearings in an orientation parallel to the driving-force transmission shaft <NUM> at a position spaced downward with respect to the driving-force transmission shaft <NUM>. The opening shaft <NUM> is provided so that one end thereof protrudes from one side wall 94a of the driving box <NUM>. The opening shaft <NUM> is connected to the opening device <NUM> at the protruding one end portion thereof.

The opening shaft <NUM> is connected to the driving-force transmission shaft <NUM> via the opening gear train <NUM> within the driving box <NUM>. The opening gear train <NUM> is configured of two gears like the driving gear train <NUM>. Specifically, the opening gear train <NUM> is configured of a driving gear 98a attached so as not to rotate relative to the driving-force transmission shaft <NUM>, and a driven gear 98b that meshes with the driving gear 98a and is attached so as not to rotate relative to the opening shaft <NUM>.

The braking device <NUM> is an electromagnetic brake and is provided so as to directly apply a brake to the driving-force transmission shaft <NUM>. In the present example, the braking device <NUM> is provided at a position inside from the inner wall 12b of the driving-side frame <NUM> in the width direction. The braking device <NUM> is mainly configured of a housing-shaped body case 110a, and is attached to the inner wall 12b of the driving-side frame <NUM> in the body case 110a. The braking device <NUM> includes a braking member 110b and a braked member 110c accommodated in the body case 110a, and the braked member 110c is disposed to be directly attached to one end (end protruding from the inner wall 12b) of the driving-force transmission shaft <NUM>.

The braked member 110c is a disk-shaped member and is attached so as not to rotate relative to the driving-force transmission shaft <NUM> in a state where the driving-force transmission shaft <NUM> is inserted through a through hole formed in a boss portion at a center. The braking member 110b is urged by an urging member (not illustrated) such as a spring member in the axial direction of the driving-force transmission shaft <NUM> to which the braked member 110c is attached. In the braking device <NUM>, a built-in exciting coil (not illustrated) is put into an excited state (or a non-excited state), so that the braking member 110b is configured to be displaced to a braked member 110c side against an urging force by the urging member. Thus, in a state where the braking member 110b is pressed against the braked member 110c, the braking device <NUM> applies the brake to the driving-force transmission shaft <NUM>, and further applies the brake to the driving shaft <NUM>, the driving motor <NUM>, and the opening device <NUM> connected to the driving-force transmission shaft <NUM>.

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, during the braking of the loom <NUM> (main shaft <NUM>), since the brake is directly applied to the driving-force transmission shaft <NUM> by the braking device <NUM>, the load applied to the transmission mechanism <NUM> that connects the driving-force transmission shaft <NUM> and the driving shaft <NUM> is smaller than that of the device of the related art.

More specifically, the braking device <NUM> is actuated, a braking force by the braking device <NUM> directly acts on the driving-force transmission shaft <NUM>, and the brake is applied to the driving-force transmission shaft <NUM>. When the brake is applied to the driving-force transmission shaft <NUM>, the brake is applied to the driving shaft <NUM> connected to the driving-force transmission shaft <NUM>, and the brake is also applied to the driving motor <NUM> and the opening device <NUM>. The brake of the driving shaft <NUM> is performed in a form of the brake of the main shaft <NUM> and the beating device <NUM> connected to the driving shaft <NUM>. For the brake of the driving shaft <NUM> (main shaft <NUM> and beating device <NUM>), as described above, since the driving-force transmission shaft <NUM> and driving shaft <NUM> are connected via the transmission mechanism <NUM> (driving gear 84a and driven gear 84b), the driving gear 84a attached to the driving-force transmission shaft <NUM> acts the braking force on the driven gear 84b attached to the driving shaft <NUM>.

When the braking is applied to the driving-force transmission shaft <NUM>, an inertia force acts on the driving-force transmission shaft <NUM> by the inertia of the driving motor <NUM> and the opening device <NUM> to which the brake is applied accordingly. Along with this, the braking force that acts on the driven gear 84b by the driving gear 84a becomes a force having a size weakened by the inertia force of the braking force by the braking device <NUM> due to the action of the inertia force. That is, during the braking, in the transmission mechanism <NUM>, the driving gear 84a causes the braking force of such a size to act on the driven gear 84b. On the other hand, when the brake is applied to the driving shaft <NUM>, the inertia force acts on the driving shaft <NUM> by the main shaft <NUM> and the beating device <NUM>. The inertia force acts on the driving gear 84a via the driven gear 84b as a force against the braking force in the transmission mechanism <NUM>.

As described above, in a case where the driving-force transmission shaft <NUM> and the driving shaft <NUM> are connected by a gear train such as the transmission mechanism <NUM>, during the braking, the gear (driving gear 84a) on the braking side causes the braking force to act on the gear (driven gear 84b) on the braked side, and the gear on the braking side receives a force against the braking force from the gear on the braked side. The greater those forces acting in this way, the greater the load is applied to the transmission mechanism <NUM>. In the loom, the inertia force (inertia force by the driving motor <NUM> and the opening device <NUM>) acting on the driving-force transmission shaft <NUM> with the brake is generally greater than the inertia force (inertia force by the main shaft <NUM> and the opening device <NUM>) acting on the driving shaft <NUM>. Therefore, if the loom is configured to directly brake the driving-force transmission shaft <NUM> having a large inertia force acting during the braking, both the above-mentioned braking force and the force against the braking force become a small force compared to that of the case of the device of the related art. Therefore, the load applied to the transmission mechanism <NUM> is smaller than that of the device of the related art, and as a result, the transmission mechanism <NUM> is prevented from being damaged 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>);
an opening device (<NUM>) that is driven by the driving motor (<NUM>);
a braking device (<NUM>) that applies a brake to the main shaft (<NUM>) for stopping rotation of the main shaft; characterized in that
a 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, wherein
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>), where the driving-force transmission shaft (<NUM>) is connected to the driving motor (<NUM>), and where the driving-force transmission shaft (<NUM>) is connected to the opening device (<NUM>); and
a transmission mechanism (<NUM>) that connects the driving-force transmission shaft (<NUM>) and the driving shaft (<NUM>), and
the braking device (<NUM>) is connected to the driving-force transmission shaft (<NUM>) so as to directly apply a brake to the driving-force transmission shaft.