Loom

Abstract

To provide a loom which includes a support structure of a drive transmission shaft which can reduce force applied to a mounting portion of a bearing case due to vibration of the loom as much as possible.SOLUTION: A loom includes: a drive transmission shaft which is connected to a warp beam through a gear member inside a loom frame and is inserted into a through hole formed in a side frame; and a support structure which is for supporting the drive transmission shaft and has a first bearing and a second bearing which are externally fitted at an interval in an axial direction with respect to the drive transmission shaft. The support structure has a first bearing case which internally fits the first bearing and is mounted on the side frame inside the loom frame and a second bearing case which internally fits the second bearing and is mounted on the side frame outside the loom frame.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to a drive transmission shaft connected to a warp beam via a gear member inside a loom frame including a pair of side frames, the drive transmission shaft being inserted through a through hole formed in the side frame, and a support structure for supporting the drive transmission shaft, the support structure including a first bearing and a second bearing externally fitted at intervals in the axial direction with respect to the drive transmission shaft.

Background Art

[0002] In a loom, a drive mechanism for rotationally driving a warp beam includes a gear member such as a pinion gear meshing with a beam gear on the warp beam, a drive transmission shaft having the gear member fixed to one end thereof, and a gear train connecting the drive transmission shaft and a drive source. In general looms, since the drive source is disposed outside the loom frame, the connection between the drive source and the drive transmission shaft by the gear train is also performed outside the loom frame. Therefore, the drive transmission shaft connected to the warp beam (beam gear) via a gear member inside the loom frame is inserted through a through hole formed in the side frame on the drive mechanism side (the side where the drive mechanism is provided) of the pair of side frames in the loom frame, and extends toward the outside of the loom frame.

[0003] And the drive transmission shaft is supported by a support structure attached to the side frame on the drive mechanism side with respect to the side frame on the drive mechanism side. The support structure includes two bearings (a first bearing and a second bearing) provided at intervals in the axial direction of the drive transmission shaft to be supported. The drive transmission shaft is rotatably supported by the support structure with the two bearings externally fitted at intervals in the axial direction. A loom having such a support structure is also disclosed in Patent Document 1.

Prior Art Documents

Patent Documents

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 48-044556 [Summary of the Invention] [Problems to be Solved by the Invention]

[0005] By the way, in the loom disclosed in Patent Document 1, the support structure is configured such that a first bearing and a second bearing are installed in a bracket (bearing case) attached to the side frame. That is, the support structure is configured such that the first bearing and the second bearing are installed in a common (single) bearing case. The bearing case is formed in a cylindrical shape in which the portion for installing both bearings extends in the axial direction so that the first bearing and the second bearing are externally fitted to the drive transmission shaft with a space therebetween in the axial direction as described above, and is attached to the side frame at one end side of the cylindrical portion.

[0006] In a general loom, the loom frame vibrates violently during weaving due to the influence of the shedding motion of the harness frame in the shedding device, the beating motion of the reed in the reed beating device, etc. Therefore, the warp beam supported by the loom frame (side frame) also vibrates violently during weaving. And as the warp beam vibrates in this way, the drive transmission shaft connected to the warp beam (beam gear) via the gear member also vibrates.

[0007] As the drive transmission shaft vibrates in this way, the vibration is transmitted to the bearing case that houses both bearings via the first bearing and the second bearing externally fitted to the drive transmission shaft. That is, the bearing case is in a state of receiving a force from the bearings in the direction of the vibration. In the support structure of Patent Document 1 in which the bearing case attached to the side frame as described above houses the bearings, since the second bearing, which is one of the two bearings, is located at a distance from the mounting position of the bearing with respect to the side frame, when the bearing case receives the force due to the vibration from the second bearing, a moment force corresponding to the force and the distance between the mounting position of the bearing case in the axial direction and the second bearing acts on the mounting portion of the bearing case.

[0008] Particularly, in the support structure of Patent Document 1, as described above, the portion housing the two bearings is formed in a (long) cylindrical shape extending in the axial direction. The first bearing is housed on the one end side (the side attached to the side frame), and the second bearing is housed on the other end side. Therefore, the position of the second bearing is significantly spaced apart from the mounting position in the axial direction. That is, in this support structure, the distance between the mounting position and the position of the second bearing in the axial direction is large. Therefore, the moment force acting on the mounting portion of the bearing case as described above is also a large force due to the large distance. Moreover, in this support structure, since two bearings are housed in a single bearing case, in addition to the force (moment force) by the second bearing as described above, the force exerted by the first bearing on the bearing case also acts on the mounting portion.

[0009] As the loom frame vibrates violently as described above, such forces will act on the mounting portion at a very high frequency. Therefore, although the bearing case is fixed to the side frame by a screw member at the mounting portion, wear or the like may occur at the mounting portion, resulting in a loose mounting state. And when the loom is operated at high speed with such looseness in the mounting state of the bearing case, the bearing case will vibrate more violently, and thus the bearing case or the screw member may be damaged.

[0010] Furthermore, when looseness occurs in the mounting state of the bearing case, the impact due to the accompanying vibration acts on both bearings, leading to damage to the bearings, or as a result of the unstable support state of the drive transmission shaft, problems such as damage to the drive transmission shaft and gear members that connect the drive transmission shaft and the beam gear of the warp beam may occur.

[0011] Therefore, an object of the present invention is to provide a loom provided with a support structure for a drive transmission shaft that can minimize the force acting on the mounting portion of the bearing case due to the vibration, in order to prevent each component (bearing case, drive transmission shaft, both bearings, gear members, etc.) in the drive mechanism from being damaged due to the vibration of the loom.

Means for Solving the Problem

[0012] The present invention is premised on a loom including a drive transmission shaft connected to a warp beam via a gear member inside a loom frame including a pair of side frames, the drive transmission shaft being inserted through a through hole formed in the side frame, and a support structure for supporting the drive transmission shaft, the support structure including a first bearing and a second bearing externally fitted at intervals in the axial direction with respect to the drive transmission shaft.

[0013] Furthermore, in order to achieve the above object, in the loom on which the present invention is premised, the support structure includes a first bearing case that houses the first bearing and is attached to the side frame inside the loom frame, and a second bearing case that houses the second bearing and is attached to the side frame outside the loom frame.

[0014] Also, in the loom according to the present invention, the first bearing case and the second bearing case may be attached to the side frame by a common screw member.

Advantages of the Invention

[0015] According to the present invention, the support structure is not configured such that the first bearing and the second bearing are housed in a common bearing case. Instead, a first bearing case and a second bearing case are provided corresponding to each bearing, and each is housed in the first bearing case and the second bearing case that are attached to the side frame separately inside and outside the loom frame. Therefore, each bearing case can be configured such that the bearing to be housed can be arranged closer to the side frame compared to the case where two bearings are housed with a distance therebetween in the axial direction. And by configuring each bearing case in this way, in each bearing case, the distance between the attachment position to the side frame and the position of the bearing becomes smaller, so that the moment force (more specifically, the moment force acting on the attachment portion of the bearing case due to the force received by each bearing case from the bearing it houses due to the vibration) becomes smaller.

[0016] Moreover, since the support structure is configured such that a bearing case is provided for each bearing, the force exerted by the bearing on the bearing case due to the vibration is also received by the corresponding bearing case for each bearing. Therefore, the force acting on the attachment portion of each bearing case is smaller compared to the case where two bearings are housed in a common bearing case.

[0017] Therefore, according to the support structure in the present invention, the force acting on the mounting portion of each bearing case due to the intense vibration of the loom frame during weaving can be made as small as possible compared to the case of the conventional configuration. Thereby, wear and the like occurring in the mounting portion due to the force acting on the mounting portion of each bearing case can be suppressed, and as a result, breakage of each component in the drive mechanism can be suppressed.

[0018] Further, in the loom according to the present invention, by configuring the support structure such that the first bearing case and the second bearing case are attached to the side frame with a common screw member, each bearing case can be attached to the side frame in a more rigid state.

[0019] Specifically, each bearing case is attached to the side frame by a screw member. By attaching the first bearing case and the second bearing case to the side frame with a common screw member, the mounting state is such that both bearing cases are attached to the side frame in a manner that sandwiches the side frame between the two bearing cases. That is, in a state where the clamping force by both bearing cases generated by tightening the screw member acts on the side frame, each bearing case is attached to the side frame.

[0020] Thereby, the total frictional force generated between both bearing cases and the side frame due to the clamping force becomes the holding force for holding each bearing case. Therefore, according to that configuration, compared to the case where each bearing case is individually attached to the side frame, the holding force of each bearing case becomes larger, so that each bearing case is attached to the side frame in a more rigid state. Note that, by being in such a state where each bearing case is rigidly attached, even when a force (the moment force and the force exerted by the bearing on the bearing case) caused by the vibration acts on each bearing case during weaving, wear and the like are less likely to occur in each bearing case.

Brief Description of the Drawings

[0021]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Mode for Carrying Out the Invention

[0022] Hereinafter, based on FIGS. 1 to 6, an embodiment of a loom according to the present invention will be described.

[0023] In the loom 1, the loom frame 2 mainly includes a pair of side frames 3, 3, and the two side frames 3, 3 are connected by a plurality of beam members 4 in a state where they face each other in the width direction (thickness direction).

[0024] Further, the loom 1 includes a reed 5a and a reed beating device 5 including a mechanism for swing-driving the reed 5a. The reed beating device 5 includes a rocking shaft 5b that is driven to reciprocate, a plurality of slay swords attached to the rocking shaft 5b, and a slay supported by each slay sword and to which the reed 5a is attached. And the reed beating device 5 is provided in such a manner as to be supported by the pair of side frames 3, 3 by being installed between the pair of side frames 3, 3 with the rocking shaft 5b.

[0025] Further, the loom 1 is provided with a woven fabric beam 13 for winding the woven fabric W woven on the front side in the front-rear direction thereof. However, the front-rear direction referred to here is a direction orthogonal to the width direction (longitudinal direction of the beam member 4) of the loom 1 in plan view. And the woven fabric beam 13 is also provided in such a manner as to be supported by the pair of side frames 3, 3 by having the shaft portions at both ends supported by the respective side frames 3.

[0026] Furthermore, the loom 1 is provided with a warp beam 15 for feeding out the warp threads T on the rear side in the longitudinal direction. In the loom 1, beam supports 20 for supporting the warp beam 15 are provided on each side frame 3. The warp beam 15 is provided in such a manner that the shaft portions at both ends are supported by the respective beam supports 20 and are thus supported by the pair of side frames 3, 3 via the pair of beam supports 20, 20.

[0027] In the loom 1 as described above, in each side frame 3, the portion for supporting the warp beam 15 is formed as a delivery frame 33 and is separate from the main body frame 31 which is the portion for supporting the reed beating device 5 and the cloth beam 13 described above. The delivery frame 33 is fixed to the main body frame 31 which is the main part, thereby forming a part of the side frame 3. That is, each side frame 3 is composed of the main body frame 31 which is the main part and supports the reed beating device 5 and the cloth beam 13, and the delivery frame 33 which is fixed to the main body frame 31 and supports the warp beam 15.

[0028] Regarding each side frame 3 in more detail, as shown in FIGS. 1 and 2, the main body frame 31 is in the shape of a housing and has a shape in which its outer surface (outer wall) is open. The two side frames 3, 3 are connected by the beam members 4 in the main body frame 31 as described above. Incidentally, the connection positions are a total of four positions, namely, two positions in the upper part and two positions in the lower part of the main body frame 31. However, the upper connection positions are two positions spaced forward and backward from the central part of the main body frame 31 with respect to the longitudinal direction. The lower connection positions are two positions near the central part.

[0029] In addition, the main body frame 31 is installed on the installation surface (floor surface) 19 in a weaving factory or the like. In the illustrated example, it is installed on the installation surface 19 via a lifting member 14 for adjusting the height position of the main body frame 31. The lifting member 14 is a block-shaped member having a substantially rectangular parallelepiped shape, and is attached to the lower surface of the main body frame 31 using a screw member such as a bolt. Then, the main body frame 31 is installed (fixed) to the installation surface 19 by fixing the lifting member 14 to the installation surface 19 with an anchor bolt provided so as to protrude from the installation surface 19.

[0030] In addition, the delivery frame 33 is a portion of the side frame 3 that supports the warp beam 15, and is fixed to the rear portion side of the main body frame 31 so as to be integrated with the main body frame 31. However, the warp beam 15 is supported by the beam support 20 as described above on the loom 1. Therefore, the delivery frame 33 supports the beam support 20. Moreover, in the loom 1 of the present embodiment, the delivery frame 33 and the beam support 20 are integrally formed, and each is a part of a single delivery structure.

[0031] A portion (delivery frame portion) 33 corresponding to the delivery frame in the delivery structure is composed of a base portion 33b that is a portion installed (fixed) on the installation surface 19 and a substantially housing-shaped support portion 33a provided so as to stand on the base portion 33b, as shown in FIG. 3. In the illustrated example, the support portion 33a is formed such that the side surface facing the inside is open and a reinforcing rib is formed near the central portion in the front-rear direction. Further, the support portion 33a is directly fixed to the installation surface 19 at the base portion 33b, and in the fixed state, it has a height dimension such that its upper end is located above the lower surface of the main body frame 31 installed on the installation surface 19 via the lifting member 14 as described above.

[0032] Also, in the delivery structure, the portion above the delivery frame portion 33 corresponds to a beam support portion (beam support portion) 20. The beam support portion 20 has a support portion 20a formed with an arc-shaped support surface for receiving bearings 18 fitted to the shaft portions at both ends of the warp beam 15, and a guide portion 20b whose upper surface is continuous with the support surface and extends rearward from the support portion 20a for guiding the warp beam 15 toward the support portion 20a. Further, the beam support portion 20 has a clamp lever 20c for holding the warp beam 15 received by the support portion 20a. The clamp lever 20c is rotatably provided with respect to the support portion 20a and is fixed to the guide portion 20b by fixing means 20d such as bolts so as to hold the warp beam 15 (bearing 18) received by the support portion 20a.

[0033] And the delivery structure is fixed to the inner wall on the rear side of the main body frame 31. Specifically, the delivery structure is arranged such that a part of the guide portion 20b in the beam support portion 20 faces rearward and overlaps the main body frame 31 in the front-rear direction and is located inside the side frame 3. However, the positional relationship between the delivery structure and the main body frame 31 is such that the support surface in the beam support portion 20 of the delivery structure is located rearward of the rear end of the main body frame 31 (the support portion does not overlap the main body frame 31). Then, the delivery structure is fixed to the main body frame 31 at a plurality of locations by screw members such as bolts in a state where its outer wall abuts against the inner wall of the main body frame 31 with the above-described positional relationship in the front-rear direction.

[0034] Note that the delivery structure is fixed to the installation surface 19 by anchor bolts provided in a form protruding from the installation surface 19 at the base portion 33b of the delivery frame portion 33 in a state of being fixed to the main body frame 31 as described above.

[0035] In addition, the loom 1 is provided with a drive mechanism 40 for rotationally driving a warp beam 15 supported by a beam support portion 20 in a delivery structure. More specifically, as shown in FIG. 4, the warp beam 15 includes a beam gear 17 attached to the outside of a beam flange 16. The drive mechanism 40 includes a delivery motor M as a drive source for rotationally driving the warp beam 15, a pinion gear 46 which is a gear member meshing with the beam gear 17 in the warp beam 15, and a drive transmission shaft 44 connected to the warp beam 15 via the pinion gear 46, the drive transmission shaft 44 having the pinion gear 46 fixed to one end thereof.

[0036] Also, as shown in FIG. 3, the drive mechanism 40 includes a gear train 48 for connecting the output shaft of the delivery motor M to the drive transmission shaft 44. Further, the gear train 48 includes a worm wheel 48a fixed to the other end of the drive transmission shaft 44, a worm shaft 48c including a worm 48b meshing with the worm wheel 48a, a transmission gear 48d fixed to one end of the worm shaft 48c, and a motor gear 48e fixed to the output shaft of the delivery motor M and meshing with the transmission gear 48d.

[0037] The gear train 48 is housed in a gear case 42 attached to the main body frame 31 (side frame 3). The gear case 42 is provided in a form disposed outside the loom frame 2. Therefore, the drive transmission shaft 44 is provided in a state of being inserted through the main body frame 31.

[0038] Therefore, a through-hole 31a through which such a drive transmission shaft 44 is inserted is formed in the main body frame 31. However, as shown in FIG. 1, the through-hole 31a is formed at a position overlapping with the outer peripheral edge of the beam gear 17 in the warp beam 15 in the lower portion on the rear side of the main body frame 31. Further, the through-hole 31a is formed in a keyhole shape, and includes a circular hole portion 31a1 having a circular hole shape and a long hole portion 31a2 having a long hole shape formed continuously with the circular hole portion 31a1. The long hole portion 31a2 is formed to extend in a direction parallel to the front-rear direction on the front side with respect to the circular hole portion 31a1. Further, the long hole portion 31a2 is formed at a position where the position of its center line substantially coincides with the position of the center of the circular hole portion 31a1 in the vertical direction.

[0039] Also, the inner diameter of the circular hole portion 31a1 is slightly larger than the outer diameter of the pinion gear 46 fixed to the drive transmission shaft 44. On the other hand, the dimension of the long hole portion 31a2 in the vertical direction is slightly larger than the shaft diameter of the drive transmission shaft 44. Further, the dimension of the long hole portion 31a2 in the longitudinal direction is larger than the shaft diameter of the drive transmission shaft 44, and in the illustrated example, it is about 1.5 times the shaft diameter.

[0040] The drive transmission shaft 44 is provided on the main body frame 31 in such a manner that it is inserted into the long hole portion 31a2 of the through-hole 31a, and thus is connected to the warp beam 15 via the pinion gear 46 inside the loom frame 2 and is connected to the output shaft of the delivery motor M via the gear train 48 outside the loom frame 2.

[0041] Then, the drive transmission shaft 44 is supported with respect to the main body frame 31 (side frame 3) by a support structure 50 attached to the main body frame 31. The support structure 50 includes two bearings (a first bearing 52 and a second bearing 54) so as to support the drive transmission shaft 44 at two positions spaced apart in the axial direction thereof. The drive transmission shaft 44 is rotatably supported with respect to the support structure 50 in such a manner that the two bearings are externally fitted thereto.

[0042] In the loom described above, in the present invention, the support structure includes a first bearing case that houses a first bearing and is attached to the side frame inside the loom frame, and a second bearing case that houses a second bearing and is attached to the side frame outside the loom frame. And in this embodiment, an example is shown in which the first bearing case and the second bearing case are attached to the side frame 3 (main body frame 31) by a common screw member. The details of such a support structure are as follows.

[0043] As shown in FIGS. 5 and 6, the first bearing case 56 is a member mainly composed of a first support portion 56a that is formed in a substantially cylindrical shape with both ends open. However, the first bearing case 56 has a first attachment portion 56b that is formed in a flange shape on one end side in the axial direction of the first support portion 56a. Note that FIG. 5 is a view (view A in FIG. 4) of the first bearing case 56 viewed from the inside of the loom frame 2, and FIG. 6 is a cross-sectional view taken along line B-B in FIG. 5.

[0044] Further, in the first bearing case 56, as shown in the drawing, the first support portion 56a has a portion (protruding portion) 56a1 that slightly protrudes inward in the radial direction at the other end so that the opening at the other end side is smaller than the opening at the one end side where the first attachment portion 56b is provided. Then, in the first bearing case 56, the first bearing 52 is installed in the first support portion 56a in such a manner as to abut against the protruding portion 56a1. Therefore, the dimension of the first bearing case 56 (the first support portion 56a) in the axial direction is larger than the thickness dimension of the first bearing 52, and in the illustrated example, it is slightly smaller than the distance between the pinion gear 46 and the main body frame 31.

[0045] Further, as shown in FIG. 5, the first attachment portion 56b is formed in a substantially trapezoidal shape. Through holes 56b1 for inserting screw members 62 for attaching the first bearing case 56 to the main body frame 31 are formed at the four corners of the first attachment portion 56b. The attachment of the first bearing case 56 to the main body frame 31 is performed in a state where the position of the first bearing case 56 with respect to the main body frame 31 is fixed (positioned) using positioning pins 64. Therefore, two positioning pins 64, 64 are provided on the main body frame 31 in the vicinity of the upper and lower edges of the long hole portion 31a2 in the through hole 31a so as to protrude from its inner surface (inner wall). Then, two positioning holes 56b2, 56b2 into which the positioning pins 64 are inserted are formed in the first attachment portion 56b.

[0046] Also, regarding the second bearing case, in this embodiment, the above-described gear case 42 is also configured to house a bearing, and the gear case 42 also serves as the second bearing case. That is, the gear case 42 is configured to have a second support portion 42a as a portion for housing the second bearing 54 in addition to a gear train housing portion 42c as a portion for housing the above-described gear train 48. Further, the gear case 42 of this embodiment also has a second attachment portion 42b which is a portion for attaching itself to the main body frame 31 as its configuration.

[0047] More specifically, as shown in FIGS. 3, 4, and 6, the gear train housing portion 42c is composed of a wheel housing portion 42c1 for housing the worm wheel 48a, a worm housing portion 42c2 for housing the worm 48b and the worm shaft 48c, and a gear housing portion 42c3 for housing the transmission gear 48d and the motor gear 48e.

[0048] Among them, the wheel storage part 42c1 has a substantially cylindrical shape with both ends open. Also, the wheel storage part 42c1 has an inner diameter slightly larger than the outer diameter of the worm wheel 48a and a dimension in the axial direction larger than the dimension in the thickness direction of the worm wheel 48a (about twice in the illustrated example) so as to store the worm wheel 48a. Further, the wheel storage part 42c1 has an opening on one end side formed smaller than the opening on the other end side. Then, a disk-shaped lid member 66 is attached to the other end of the wheel storage part 42c1, and the opening on the other end side is in a state of being closed by the lid member 66.

[0049] Also, the worm storage part 42c2 has a generally cylindrical shape. Also, the worm storage part 42c2 has an inner diameter slightly larger than the outer diameter of the worm 48b and a dimension in its axial direction slightly smaller than the outer diameter of the wheel storage part 42c1. Then, the worm storage part 42c2 is integrally formed with the wheel storage part 42c1 on the outer peripheral surface of the wheel storage part 42c1 in such a direction that its axial direction is orthogonal to the axial direction of the wheel storage part 42c1. Also, in such an integrally formed state, the internal spaces of the wheel storage part 42c1 and the worm storage part 42c2 are connected to each other.

[0050] And in the worm storage portion 42c2, the worm shaft 48c is accommodated in such a manner that the worm wheel 48a and the worm 48b stored in the wheel storage portion 42c1 mesh with each other. More specifically, in the gear case 42 (wheel storage portion 42c1), the drive transmission shaft 44 is rotatably supported as will be described later. Further, the support is performed in such a manner that the axial direction of the drive transmission shaft 44 coincides with the axial direction of the wheel storage portion 42c1 having a cylindrical shape, and the axis of the drive transmission shaft 44 substantially coincides with the center of the wheel storage portion 42c1 when viewed in the axial direction. Then, the worm wheel 48a is stored in the wheel storage portion 42c1 in a state of being fitted to one end portion of the drive transmission shaft 44. In this state, the worm wheel 48a is provided in such an arrangement that the center of its gear teeth substantially coincides with the center of the worm storage portion 42c2 having a cylindrical shape in the axial direction.

[0051] Then, the worm shaft 48c is stored in the worm storage portion 42c2 in such an arrangement that the worm 48b meshes with the worm wheel 48a provided as described above with respect to the axial direction thereof. Note that the worm shaft 48c is rotatably supported in the worm storage portion 42c2 via a bearing or the like (not shown). Further, the worm shaft 48c is provided in such a manner that one end portion thereof protrudes from the open one end side in the worm storage portion 42c2 in the state of being stored (supported) in this way.

[0052] Also, the gear storage part 42c3 is a part that stores gears (transmission gear 48d, motor gear 48e) that connect the worm shaft 48c and the output shaft of the feed motor M as described above. In the illustrated configuration, it is integrally formed with the worm storage part 42c2. Specifically, one of the both side surfaces of the gear storage part 42c3 is provided integrally with the worm storage part 42c2 in such a form as to be continuous with the edge of one end side that is opened in the worm storage part 42c2 as described above. Note that one end part of the worm shaft 48c protrudes from the opened one end side in the worm storage part 42c2 as described above. Therefore, a through hole through which one end part of the worm shaft 48c is inserted is formed in one side surface of the gear storage part 42c3. Thereby, one end part of the worm shaft 48c is in a state of being located inside the gear storage part 42c3. Then, the transmission gear 48d is fixed to one end part of the worm shaft 48c located inside the gear storage part 42c3.

[0053] Also, the feed motor M is attached to the other side surface of the gear storage part 42c3 in such a direction that the axial direction of the output shaft is made to coincide with the axial direction of the worm shaft 48c and the output shaft is directed toward one side surface of the gear storage part 42c3. Therefore, a through hole through which the output shaft of the feed motor M is inserted is formed in the other side surface of the gear storage part 42c3. Thereby, in a state where the feed motor M is attached to the gear storage part 42c3, most of the output shaft of the feed motor M is located inside the gear storage part 42c3. Then, the motor gear 48e is fixed to the output shaft of the feed motor M as described above. And the motor gear 48e and the transmission gear 48d are in a meshed state inside the gear storage part 42c3.

[0054] In addition, the gear case 42 has a second attachment portion 42b which is a portion for attaching itself to the main body frame 31 as described above. More specifically, the wheel storage portion 42c1 in the gear train storage portion 42c has a substantially cylindrical shape as described above and has a shape in which the opening on one end side is smaller than the opening on the other end side, and the inner diameter of the opening on one end side is about half of the opening on the other end side. Therefore, the wheel storage portion 42c1 has a wall portion 42c4 extending in the radial direction with respect to the opening on the other end side at one end side thereof. On top of that, the gear case 42 has four columnar leg portions 42b1 extending in the axial direction of the wheel storage portion 42c1 from the wall portion 42c4, and the second attachment portion 42b is constituted by the four columnar leg portions 42b1.

[0055] Incidentally, the four leg portions 42b1 are formed on the wall portion 42c4 around the opening on one end side of the wheel storage portion 42c1 when viewed in the axial direction of the wheel storage portion 42c1. Also, the positions where the four leg portions 42b1 are formed are positions that can be aligned with the positions of the four through holes 56b1 formed in the first attachment portion 56b of the first bearing case 56. Furthermore, the positions of the four leg portions 42b1 with respect to the wheel storage portion 42c1 are such that, in a state where they are aligned with the positions of the four through holes 56b1 as described above, when viewed in the axial direction of the first bearing case 56 (wheel storage portion 42c1), the axis of the first bearing case 56 and the axis of the wheel storage portion 42c1 are in a state of coincidence.

[0056] Also, as described above, in this embodiment, the first bearing case 56 and the second bearing case (gear case 42) are attached to the side frame 3 (main body frame 31) by a common screw member. And the common screw member is the screw member 62 described above. Therefore, female screw holes 42b3 into which the screw member 62 is screwed are formed on the end faces 42b2 of the respective leg portions 42b1. Also, four insertion holes 31b through which the screw member 62 is inserted are formed in the main body frame 31.

[0057] Furthermore, the attachment of the gear case 42 to the main body frame 31 is performed in a state where the position of the gear case 42 with respect to the main body frame 31 is fixed using a positioning pin (not shown), similar to the first bearing case 56. Therefore, two positioning pins are provided on the main body frame 31 in the vicinity of the upper and lower edges of the long hole portion 31a2 in the through hole 31a, protruding from its outer surface (outer wall). Then, among the four leg portions 42b1, positioning holes (not shown) into which the positioning pins are inserted are formed in the end faces 42b2 of the corresponding two leg portions 42b1.

[0058] Also, the gear case 42 has a second support portion 42a as a portion for housing the second bearing 54 inside the wheel housing portion 42c1. More specifically, the gear case 42 is configured to include a second support portion 42a integrally formed with respect to the wall portion 42c4 in the wheel housing portion 42c1. As shown in FIG. 6, the second support portion 42a has a substantially cylindrical shape with both ends open, and is integrally formed with the wall portion 42c4 so as to protrude from the inner surface of the wall portion 42c4 toward the inside of the wheel housing portion 42c1. Note that the second support portion 42a is formed at a position where its axis coincides with the axis of the wheel housing portion 42c1 when viewed in the axial direction. Furthermore, the second support portion 42a is a portion for housing the second bearing 54 as described above, and has an inner diameter such that the second bearing 54 can be fitted therein, and the dimension in the axial direction is slightly larger than the thickness dimension of the second bearing 54.

[0059] Also, the inner diameter of the second support portion 42a is larger than the opening on one end side of the wheel housing portion 42c1 described above. Therefore, the second support portion 42a is such that a part of the wall portion 42c4 exists inside it on the wall portion 42c4 side when viewed in the axial direction. Then, in the second support portion 42a, the second bearing 54 is housed in a state of being in contact with the wall portion 42c4.

[0060] And in the support structure 50 described above, the first bearing case 56 and the gear case (second bearing case) 42 are attached to the main body frame 31 by the common screw member 62 in such a manner as to sandwich the main body frame 31.

[0061] In the attachment, the first bearing case 56 is arranged inside the loom frame 2 as described above and is brought into contact with the inner surface of the main body frame 31 in a state of being positioned by the positioning pin 64. Further, the gear case 42 is arranged outside the loom frame 2 and is brought into contact with the outer surface of the main body frame 31 at the end surface 42b2 of each leg portion 42b1 in the second attachment portion 42b in a state of being positioned by the positioning pin protruding from the outer surface of the main body frame 31. And in that state, the through hole 56b1 formed in the first attachment portion 56b of the first bearing case 56 and the female screw hole 42b3 formed in the end surface 42b2 in the second attachment portion 42b of the gear case 42 are in a state where their positions coincide with the insertion hole 31b formed in the main body frame 31 when viewed in the axial direction of the first support portion 56a (second support portion 42a).

[0062] Then, the screw member 62 is inserted into the through hole 56b1 in the first bearing case 56 from the side of the first bearing case 56 (inside the loom frame 2), is inserted into the insertion hole 31b in the main body frame 31, and is screwed into the female screw hole 42b3 in the gear case 42. Thereby, the first bearing case 56 and the gear case (second bearing case) 42 are attached (fixed) to the main body frame 31 in such a manner as to sandwich the main body frame 31.

[0063] In the attached state, when viewed in the axial direction of the first support portion 56a (the second support portion 42a in the gear case 42) in the first bearing case 56, the first support portion 56a and the second support portion 42a are in a state where their axes coincide. Then, the drive transmission shaft 44 is externally fitted with the first bearing 52 installed inside the first support portion 56a inside the loom frame 2, and externally fitted with the second bearing 54 installed inside the second support portion 42a outside, and is supported by the first bearing case 56 and the gear case 42.

[0064] Thereby, the drive transmission shaft 44 is rotatably supported with respect to the main body frame 31. And in the state where the drive transmission shaft 44 is supported in this way, the pinion gear 46 fixed to one end of the drive transmission shaft 44 meshes with the beam gear 17 on the warp beam 15, and the worm wheel 48a meshes with the worm 48b supported (accommodated) in the worm accommodation portion 42c2 of the gear row accommodation portion 42c in the gear case 42.

[0065] According to the loom 1 of the present embodiment configured as described above, in the support structure 50, the first bearing 52 is installed inside the first bearing case 56 attached to the inner surface of the main body frame 31 (inside the loom frame 2), and the second bearing 54 is installed inside the gear case 42 that also serves as the second bearing case attached to the outer surface of the main body frame 31 (outside the loom frame 2). Therefore, compared with the conventional support structure in which the first bearing and the second bearing are installed in a common bearing case, the support structure 50 can arrange both the first bearing 52 and the second bearing 54 closer to the main body frame 31 (side frame 3).

[0066] As a result, in the support structure 50, the distance between the position where each bearing case (the first bearing case 56 and the gear case 42) is attached to the main body frame 31 and the position where the bearing is installed is reduced. Therefore, due to the vibration of the loom frame 2, when each bearing case receives force from the bearing it houses, the moment force acting on the attachment portion of the bearing case is reduced. Moreover, since the bearing cases are provided for each bearing, the force that the bearing case receives from the bearing due to the vibration is also smaller compared to the conventional support structure where two bearings are housed in a common bearing case. As a result, the force acting on the attachment portion of each bearing case due to the vibration is smaller compared to the conventional support structure.

[0067] Thus, in the support structure 50, the force acting on the attachment portion of each bearing case due to the vibration can be made as small as possible compared to the conventional support structure. Thereby, wear and the like occurring in the attachment portion due to the force can be suppressed, and as a result, damage to each component in the drive mechanism 40 such as each bearing case, both bearings, the drive transmission shaft 44, and each gear member can be suppressed.

[0068] In the loom 1 of the present embodiment, by attaching the first bearing case 56 and the gear case 42 to the main body frame 31 with a common screw member 62, the first bearing case 56 and the gear case 42 are in a state of being attached to the main body frame 31 in a manner that sandwiches the main body frame 31. Thereby, compared to the case where the first bearing case 56 and the gear case 42 are individually attached to the main body frame 31, the first bearing case 56 and the gear case 42 can be attached to the main body frame 31 (side frame 3) in a more rigid state. As a result, wear and the like are less likely to occur in the attachment portions of the first bearing case 56 and the gear case 42.

[0069] Note that the present invention is not limited to the embodiments (the above embodiments) described above, and can also be implemented in the following modified embodiments.

[0070] (1) Regarding the second bearing case, in the above embodiment, the gear case for housing the gear train connected to the drive transmission shaft also serves as the second bearing case. However, in the present invention, the second bearing case only needs to house at least the second bearing, and it may be configured as a member separate from the gear case.

[0071] Specifically, for example, the second bearing case is mainly formed of a substantially cylindrical portion with both ends open, similar to the first bearing case 56 in the above embodiment, and is configured to have a flange-shaped portion for attaching itself to the side frame. Then, the second bearing case houses the second bearing and is attached to the outer surface of the side frame at the flange-shaped portion. In that case, the gear case provided as a member separate from the second bearing case is located outside the second bearing case with respect to the side frame, and in the width direction of the loom, the center of the worm wheel in the housed gear train is arranged to coincide with the axis of the second bearing housed in the second bearing case, and is attached to the side frame or the like by appropriate attachment means.

[0072] (2) Regarding the attachment configuration of the first bearing case and the second bearing case constituting the support structure to the side frame, in the support structure 50 in the above embodiment, the first bearing case 56 and the gear case 42 that also serves as the second bearing case are attached to the main body frame 31 (side frame 3) in a manner of being tightened together by a common screw member 62. However, the support structure in the present invention is not limited to being configured such that the first bearing case and the second bearing case are attached by a common screw member, and may be configured such that the first bearing case and the second bearing case are attached by screw members provided respectively for each of them.

[0073] Note that the attachment of the side frames of each bearing case may be performed, for example, in such a manner that a screw member through which the side frame is inserted is screwed into the bearing case as in the second bearing case of the above-described embodiment, or in such a manner that a screw member inserted through a flange-shaped portion of the bearing case is screwed into the side frame. Further, in the latter case, separate female screw holes may be formed for each bearing case in the side frame. Alternatively, it is also possible to screw the screw member from each bearing case side into a female screw hole formed so as to be common to both bearing cases and penetrate the side frame.

[0074] (3) Regarding the loom as a premise, in the above-described embodiment, the loom 1 is configured such that the drive source of the drive mechanism 40 for rotationally driving the warp beam 15 (beam gear 17) is the delivery motor M. However, the loom to which the present invention is applied may be configured such that the drive mechanism for rotationally driving the warp beam (beam gear) uses the main shaft of the loom as the drive source.

[0075] Note that the present invention is not limited to the examples described above, and can be appropriately modified within the scope not departing from the gist thereof.

Explanation of Reference Numerals

[0076] 1 Loom 2 Frame 3 Side Frame 4 Beam Material 5 Reed Beating Device 15 Warp Beam 16 Beam Flange 17 Beam Gear 19 Installation Surface 20 Beam Support Portion 31 Main Body Frame 31a Through Hole 31a1 Round Hole Portion 31a2 Long Hole Portion 31b Insertion Hole 40 Drive Mechanism 42 Gear Case 42a Second Support Portion 42b Second Attachment Portion 42b1 Leg Portion 42b2 End Face 42b3 Female Screw Hole 42c Gear train storage section 42c1 Wheel storage section 42c2 Worm storage section 42c3 Gear storage section 42c4 Wall section 44 Drive transmission shaft 46 Pinion gear 48 Gear train 48a Worm wheel 48b Worm 48c Worm shaft 48d Transmission gear 48e Motor gear 50 Support structure 52 First bearing 54 Second bearing 56 First bearing case 56a First support section 56a1 Protrusion 56b First mounting section 56b1 Through hole 56b2 Positioning hole 62 Screw member 64 Positioning pin 66 Cover member W Woven fabric T Warp M Feeding motor

Claims

1. A drive transmission shaft connected to a warp beam via a gear member inside a loom frame including a pair of side frames, the drive transmission shaft being inserted through a through hole formed in the side frame, and a support structure for supporting the drive transmission shaft, the support structure including a first bearing and a second bearing externally fitted at an axial interval with respect to the drive transmission shaft. In a loom provided with: The support structure includes a first bearing case that houses the first bearing and is attached to the side frame inside the loom frame, and a second bearing case that houses the second bearing and is attached to the side frame outside the loom frame. A loom characterized by this.

2. The first bearing case and the second bearing case are attached to the side frame by a common screw member. The loom according to claim 1, characterized by this.

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