weaving machine

Abstract

Provided is a loom that suppresses noise and problems caused by vibration of two side frames as much as possible. The loom includes a loom frame including a pair of side frames and a harness guide that is attached to each side frame and guides the up-and-down movement of a harness, a rocking shaft, a main shaft, and a cloth roller that are supported by a support shaft between the two side frames, and in the loom, the support shaft is supported at least via a bearing that is fitted to a support portion provided in an inner side wall of the side frame, wherein the inner side wall of at least one side frame is formed so that, in the width direction of the loom, at least one support portion is an offset support portion in which the inner side end of the support position of the bearing is located on the inner side of the loom frame compared to the reference position, after the position of the portion of the inner side surface of the inner side wall that supports the harness guide in the warp direction is taken as the reference position.

Description

Technical Field

[0001] The present invention relates to a loom comprising a loom frame including a pair of side frames and a heald frame guide mounted on each side frame and guiding the up-and-down movement of the heald frames. A rocker shaft, a main shaft, and a fabric roll, which are mounted between the two side frames, are supported on each side frame via a support shaft. In this loom, the support shaft is supported at least via a bearing embedded in a support portion located on the inner side wall of the side frame. Background Technology

[0002] For example, as disclosed in Patent Document 1, a typical loom has a rocker arm (rocker arm rotation axis) and a main shaft (drive shaft) mounted between a pair of side frames in the loom frame. Moreover, the rocker arm and the main shaft are connected to a support shaft, which is located between the two side frames. The support shaft is supported by bearings on the inner and outer side walls of each side frame.

[0003] Furthermore, the loom is equipped with a take-up mechanism that feeds the woven fabric to the take-up beam side at a speed corresponding to the fabric density. This take-up mechanism has a take-up roller mounted between a pair of side frames. Incidentally, this take-up roller is generally also connected to a support shaft supported on each side frame in the manner described above, thus being positioned between the two side frames.

[0004] Furthermore, the loom is equipped with a pair of heald frame guides for guiding the up-and-down movement of the heald frames in the sheathing device. Moreover, these heald frame guides are provided on the loom in a manner supported by the side frames.

[0005] Furthermore, the loom determines its specifications based on the fabric width to be woven. Moreover, the heald frames mounted on the loom are of a width corresponding to the maximum fabric width that can be woven on that loom. In this loom, as described above, the heald frames are guided up and down by a pair of heald frame guides, and each heald frame guide is supported by a bracket or the like mounted on the corresponding side frame.

[0006] Therefore, the spacing between the pair of heald frame guides is defined by the positions of the two brackets in the width direction of the loom. Consequently, the spacing between the two side frames on which the brackets are mounted is set such that the pair of heald frame guides supported by the brackets on each side frame are configured to guide the heald frames in the spacing described above. That is, the spacing between the pair of side frames in the loom frame is such that the spacing of the positions where the brackets are mounted (the positions that support the heald frame guides in the warp direction) achieves the configuration of the heald frame guides as described above, and is determined based on the spacing of the positions where the brackets are mounted according to the width of the heald frames.

[0007] Incidentally, in many looms, this bracket is mounted on the inner side of the side frame. That is, the position of the mounting bracket in the side frame becomes its inner side. And, although this inner side has some irregularities, it is generally flat.

[0008] Existing technical documents

[0009] Patent documents

[0010] Patent Document 1: Japanese Patent Application Publication No. 9-228193 Summary of the Invention

[0011] The problem that the invention aims to solve

[0012] In such a loom, it is known that the long shaft components, namely the aforementioned rocker shaft, main shaft, and cloth roll, which are mounted between two side frames, vibrate during weaving.

[0013] Specifically, the rocker arm supporting the reed vibrates during the weft-beating action in weaving, impacted by the reed striking the weft threads of the fabric. Furthermore, this rocker arm is connected to the main shaft via a motion conversion mechanism such as a linkage, and the main shaft is rotated to drive the rocker arm to oscillate. Therefore, as described above, the rocker arm vibrates during the weft-beating action, causing the main shaft, connected to the rocker arm via the motion conversion mechanism, to also vibrate.

[0014] Furthermore, the fabric take-up roller is configured to wind the fabric, as described above, to feed the fabric woven as described above to the take-up warp beam side, and the fabric is continuous with the warp yarns fed from the warp beam at the weft end. Moreover, the fabric is subjected to the impact generated by the reed striking the weft end, as described above, and is subjected to a force that causes the weft end to shift in the front-to-back direction due to the tension variations of the accompanying warp yarns. Simultaneously, the fabric exerts a periodic force on the take-up roller, causing the take-up roller to vibrate.

[0015] Furthermore, the aforementioned shaft components are arranged as a pair of side frames mounted within the loom frame, as described above. Therefore, the aforementioned shaft components vibrate as described above, causing both side frames and even the entire loom frame to vibrate. In particular, with the increasing speed of looms in recent years, this vibration has become even more intense. Moreover, because the loom frame vibrates so violently, problems such as noise and adverse effects on weaving sometimes occur.

[0016] In view of the above-mentioned existing looms, the object of the present invention is to provide a loom in which the rocker shaft, main shaft, and cloth roll are supported by support shafts on each side frame as described above, thereby suppressing the occurrence of the above-mentioned problems as much as possible.

[0017] Solution for solving the problem

[0018] The present invention is based on a loom having a loom frame including a pair of side frames and a heald frame guide mounted on each side frame and guiding the up and down movement of the heald frame. A rocker shaft, a main shaft, and a cloth roll are mounted between the two side frames and supported on each side frame by a support shaft, which is supported at least by a bearing embedded in a support portion located on the inner side wall of the side frame.

[0019] Furthermore, the present invention is characterized in that the inner wall of at least one side frame is formed such that, in the width direction of the loom, after taking the position of the portion of the inner side surface of the inner wall that supports the heald frame guide in the warp direction as a reference position, at least one support portion is an offset support portion that positions the inner end of the bearing support position inside the loom frame relative to the reference position.

[0020] Furthermore, in such a loom of the present invention, the offset support portion can also be formed such that the bearing support position is located inside the loom frame compared to the reference position. Further, the loom can also be configured such that the support portion supporting the support shaft connected to the rocker arm and / or the main shaft is an offset support portion.

[0021] The effects of the invention are as follows.

[0022] According to the present invention, in a loom in which each of the aforementioned shaft components, as described above, is supported by a support portion provided on the inner wall of each side frame via a support shaft between two side frames, at least one of the aforementioned support portions is formed as an offset support portion, wherein the inner end of the bearing fitted into the aforementioned support portion is located inside the loom frame relative to the aforementioned reference position. Furthermore, according to this configuration, since the vibration of the entire loom frame generated during weaving is further suppressed, problems such as noise and adverse effects on weaving can be minimized.

[0023] More specifically, the spacing between a pair of side frames in the loom is determined, as described above, based on the spacing of the positions where brackets corresponding to each heald frame guide can be installed. Furthermore, according to the invention, in at least one of the pair of side frames with such a defined spacing, at least one of the aforementioned support portions is formed as the aforementioned offset support portion. Thus, the bearing support position in this offset support portion is located inward in the aforementioned width direction compared to the existing loom (side frame) structure (existing structure) where the inner end of the support portion is located approximately at the same position as the aforementioned reference position.

[0024] Therefore, the end (connecting end) of the support shaft supported in the offset mounting portion, on the side of the shaft member, is located further inward compared to the existing structure. Consequently, the distance between the pair of connecting ends, at least one of which is thus arranged, is smaller compared to the existing structure. As a result, the length (dimensional in the axial direction) of the shaft member mounted between the pair of support shafts arranged in this way is smaller compared to the existing structure. Furthermore, by reducing the length in this way, the shaft member becomes less prone to bending, and even when subjected to impacts accompanying weft insertion movements and forces accompanying warp tension variations, the amplitude of the resulting vibration is smaller compared to the existing structure.

[0025] Furthermore, the side frame formed with the aforementioned support portion serving as the aforementioned offset support portion is configured such that at least a portion of its inner sidewall that serves as the aforementioned offset support portion protrudes inward. As a result, compared to the aforementioned conventional structure where the inner sidewall is generally planar, this side frame exhibits increased rigidity and improved seismic resistance.

[0026] Thus, according to the present invention, at least one of the aforementioned shaft components, such as the rocker shaft, main shaft, and fabric roll, which serve as the vibration source of the side frame, is configured such that, compared to the conventional structure described above, the amplitude of vibration during weaving is reduced, and furthermore, the side frame itself has improved vibration resistance as described above. Therefore, the vibration of the two side frames during weaving is suppressed compared to the conventional structure described above. Consequently, the vibration generated by the entire loom frame is further suppressed, minimizing noise and other problems that adversely affect weaving.

[0027] Furthermore, in the loom of the present invention, the side frame formed with the aforementioned support portion as the aforementioned offset support portion has the aforementioned offset support portion formed such that the aforementioned support position is located inside the loom frame compared to the aforementioned reference position, thereby further increasing rigidity and enabling more effective improvement in shock resistance. As a result, vibrations generated by the entire loom frame can be suppressed more effectively, and problems such as noise and adverse effects on weaving can be suppressed more effectively.

[0028] In detail, by making the side frame a side frame with the aforementioned offset support portion as described above, the rigidity of the side frame is increased, thereby improving its seismic resistance. Furthermore, the greater the protrusion, the larger the portion of the inner wall of the side frame extending along the width direction, further increasing rigidity and improving seismic resistance. Thus, by increasing the protrusion, particularly by forming the offset support portion in the side frame such that the support position is located inside the reference position, even when the inner end of the support position is inside the reference position, compared to the case where the support position and the reference position overlap (where the portion of the inner wall that forms the offset support portion overlaps with the portion including the reference position), the rigidity of the side frame is further increased, and the improvement in seismic resistance is achieved more effectively. Moreover, as a result, vibrations generated by the entire loom frame are more effectively suppressed, and problems such as noise and adverse effects on weaving are more effectively suppressed.

[0029] Furthermore, in the loom of the present invention, the aforementioned bias support is the support required for supporting the rocker shaft and / or the main shaft in each of the aforementioned shaft components, thereby enabling more effective suppression of vibration of the entire loom frame accompanying weaving.

[0030] In detail, as described above, the shaft components mounted between the two side frames vibrate during weaving, but the rocker shaft vibrates most violently due to the impact generated by the weft-beating motion. Therefore, the aforementioned support portion required for the support shaft supporting the rocker shaft and / or the aforementioned support portion required for the support shaft supporting the main shaft mechanically connected to the rocker shaft by the motion conversion mechanism are the aforementioned bias support portions. As described above, this will more effectively suppress the vibration of at least one of the two mechanically connected shaft components during weaving, and will more effectively suppress the vibration of the two side frames. Attached Figure Description

[0031] Figure 1 This is a top view of the frame of the loom to which the present invention is applied.

[0032] Figure 2 yes Figure 1 AA sectional view.

[0033] Figure 3 yes Figure 1 A magnified 3D view of a portion of the frame of a loom.

[0034] Figure 4 yes Figure 1 A partially enlarged sectional view of the frame of the loom.

[0035] Figure 5 yes Figure 1 A partially enlarged sectional view of the frame of the loom.

[0036] Symbol Explanation

[0037] 1—Frame, 2—Side frame, 3a—Front upper support bar, 3b—Front lower support bar, 3c—Rear upper support bar, 3d—Rear lower support bar, 4—Rocker shaft, 4a—Support shaft, 4c—Connecting end, 5—Reed, 6—Warp beam, 7—Woven beam support, 8—Take-up woven beam, 9—Inner side, 10—Reference surface, 11—Heald frame, 12—Heald frame guide, 12b—Guide part, 14—Bracket, 15—Cloth roll, 15a—Support shaft, 15b—Flange, 15c—Fixing bolt, 16—Main shaft, 16a—Support shaft, 16c—Connecting end, 17—Protrusion, 19—Bearing cage, 19a—Embedded part, 19b—Flange, 19c—Through hole, 19e—End 20—Bearing cage, 20a—Embedded part, 20b—Flange part, 20c—Through hole, 20e—End wall, 21—Bearing cage, 22a—Bearing, 22b—Bearing, 22c—Bearing, 22d—Bearing, 22e—Bearing, 23a—Through hole, 23b—Through hole, 23c—Through hole, 23d—Through hole, 23e—Through hole, 25—Bolt, 27—Inner wall, 28—Outer wall, 29—Wall part, 30—Bearing cage, 31—Bearing cage, 35—Pressure roller, T—Warp yarn, W—Weaving, B—Weaving width direction, E—Warp direction (front and back direction), F—Feed-out side, G—Take-up side. Detailed Implementation

[0038] The following is based on Figures 1-5 An embodiment of the frame of the loom to which the present invention is applied (this embodiment) will be described.

[0039] In the loom, the frame 1 is configured such that a pair of side frames 2, 2 serve as the main body, and the two side frames 2, 2 are connected by four beam members 3a, 3b, 3c, 3d. Furthermore, each side frame 2 is formed into a box shape with internal space. Moreover, the two side frames 2, 2 are connected by beam members 3a, 3b, 3c, 3d in a state of facing each other in their width direction (thickness direction = width direction of the loom).

[0040] Furthermore, in the loom, on one side in the front-to-back direction, a warp beam 6 for feeding the warp yarn T is provided, supported by two side frames 2, 2. Moreover, on the other side in the aforementioned front-to-back direction of the loom, a take-up warp beam 8 for taking up the woven fabric is provided, supported by two side frames 2, 2.

[0041] Furthermore, the loom includes a pair of heald frame guides 12, 12 for guiding the up-and-down movement of the heald frames 11 in the sheathing device. Each heald frame guide 12 is mounted on the loom in a manner supported by a bracket 14 mounted on the corresponding side frame 2. Moreover, the bracket 14 is mounted on the side frame 2 in a manner fixed to the inner side wall 27 of the corresponding side frame 2.

[0042] Furthermore, each bracket 14 consists of a plate-shaped support plate 14a mounted on the frame and a support shaft 14b mounted on the support plate 14a in a manner that protrudes from one end face of the support plate 14a. Moreover, each bracket 14 is fixed to the inner wall 27 of the side frame 2 as described above, with the support shaft 14b positioned above the upper surface of the side frame 2 and facing the inside of the loom (hereinafter referred to as "inner side"). However, regarding its installation position, in the aforementioned front-rear direction, the support shaft 14b is approximately at the center of the side frame 2.

[0043] Furthermore, each heald frame guide 12 is supported by the corresponding side frame 2 via the bracket 14 in the form of the front end of the support shaft 14b installed in the bracket 14. Therefore, the positional relationship between the side frame 2 and the heald frame guide 12 in the width direction is such that the heald frame guide 12 is approximately the thickness of the bracket 14 away from the inner side surface 9 of the inner side wall 27 of the side frame 2.

[0044] The heald frame guide 12 has two guide portions 12b that are spaced apart in the vertical direction when supported on the side frame 2 as described above. Each guide portion 12b has multiple guide grooves for guiding the vertical movement of the multiple heald frames 11 of the loom. Furthermore, in this loom, each heald frame 11 is positioned such that its two sides are guided by the guide grooves of a pair of heald frame guides 12, 12.

[0045] Thus, the position of the guide groove in each heald frame guide 12 becomes the position of the guide heald frame 11 on one side of each side frame 2 in the loom. Moreover, based on the positional relationship between the side frame 2 and the heald frame guide 12 as described above, this guide position is defined by the position of the side frame 2 (inner surface 9). Therefore, the portion (surface) of the mounting bracket 14 in the inner surface 9 of the side frame 2 becomes the reference surface 10 for defining its guide position, and the position of the reference surface 10 in the aforementioned width direction becomes the reference position (reference position) used to define the aforementioned guide position.

[0046] Incidentally, in a loom, the fabric width W to be woven is used as a reference to determine its specifications. Furthermore, the heald frame 11 mounted on the loom has a width corresponding to the loom's specifications (the maximum fabric width that can be woven). Therefore, the spacing between the pair of side frames 2, 2 supporting the pair of heald frame guides 12, 12 provided to guide such heald frames 11 is set based on the width of the heald frame 11 and the positional relationship between the side frames 2 and the heald frame guides 12. Moreover, the spacing between the pair of reference surfaces 10, 10 included in the pair of side frames 2, 2 with this spacing is also determined based on the spacing between the side frames 2, 2.

[0047] Furthermore, regarding the four beam members connecting the pair of side frames 2, 2, two of the beam members 3a and 3b are configured as take-up side beam members (take-up side beam members 3a and 3b) arranged on the take-up warp beam 8 side in the aforementioned front-back direction, and the remaining two beam members 3c and 3d are configured as feed-out side beam members (feed-out side beam members 3c and 3d) arranged on the warp beam 6 side in the aforementioned front-back direction. The take-up side beam members 3a and 3b are positioned differently in the vertical direction, with the upper beam member 3a being the so-called front upper support bar and the lower beam member 3b being the so-called front lower support bar. Similarly, the feed-out side beam members 3c and 3d are also positioned differently in the vertical direction, with the upper beam member 3c being the so-called rear upper support bar and the lower beam member 3d being the so-called rear lower support bar.

[0048] Furthermore, the front upper support bar 3a and the rear upper support bar 3c have flanges formed at both ends. Multiple through holes for bolts to be inserted through these flanges are formed therethrough. The bolts inserted into the through holes of each flange are then inserted into through holes formed on the inner surfaces 9 of the corresponding side frames 2, and nuts are threaded onto these bolts, thereby fixing the front upper support bar 3a and the rear upper support bar 3c relative to the inner surfaces 9 of each side frame 2. In this way, the front upper support bar 3a and the rear upper support bar 3c are fixed to the inner surfaces 9 of each side frame 2, thereby connecting the two side frames 2, 2.

[0049] Furthermore, the front lower support 3b and the rear lower support 3d are beam components with a cross-sectional shape approximately "U"-shaped, and have end walls formed at both ends to block the ends. Multiple through holes for inserting bolts for fixing are formed in these end walls. The fixing bolts, which are inserted into the through holes in each end wall, are then inserted into through holes formed in the inner surface 9 of the corresponding side frame 2, and the nuts are threaded onto these fixing bolts, thereby fixing the front lower support 3b and the rear lower support 3d relative to each side frame 2 (inner surface 9). In this way, the front lower support 3b and the rear lower support 3d are fixed to the inner surface 9 of each side frame 2, thereby connecting the two side frames 2, 2.

[0050] The main shaft 16 of the loom is mounted between the two side frames 2, 2 in a direction parallel to the front upper support bar 3a, that is, parallel to the width direction of the loom (hereinafter referred to as the "width direction"). Furthermore, the support position of the main shaft 16 is between the front upper support bar 3a and the bracket 14 (heald frame guide 12) in the aforementioned front-back direction, and in the vertical direction, its upper end (upper edge) is located near the lower surface of the front upper support bar 3a.

[0051] Furthermore, the loom is equipped with a weft-beating mechanism that drives the reed 5 to swing. In this weft-beating mechanism, the reed 5 is supported on the rocker arm 4 via multiple reed feet. The rocker arm 4 is arranged between the two side frames 2, 2 in a direction parallel to the aforementioned width direction. Moreover, the support position of the rocker arm 4 is approximately the same as that of the main shaft 16 in the aforementioned front-rear direction, and in the vertical direction, it is positioned above the main shaft 16 and overlaps with the front upper support bar 3a.

[0052] Furthermore, the loom is equipped with a take-up mechanism that feeds the woven fabric W to the take-up warp beam 8 at a speed corresponding to the fabric density. This take-up mechanism includes a take-up roller 15 and a plurality of pressure rollers 35, 35 pressed against the take-up roller 15 by a pressing mechanism (not shown). The take-up roller 15 is arranged between two side frames 2, 2 in a direction parallel to the aforementioned width direction. Furthermore, the support position of the take-up roller 15 is located on the opposite side of the main shaft 16 relative to the front upper support bar 3a in the aforementioned front-rear direction, and overlaps with the front upper support bar 3a in the vertical direction.

[0053] Furthermore, as described above, the main shaft 16, the rocker shaft 4, and the fabric roll 15, which are mounted between the two side frames, are supported on each of the side frames 2, 2 via support shafts 16a, 4a, and 15a. Therefore, the loom has support shafts 16a, 4a, and 15a corresponding to each of the aforementioned shaft components, and in each of the side frames 2 of the two side frames 2, 2, each support shaft 16a, 4a, and 15a is provided on the loom in such a manner that the corresponding (supported) shaft components are supported on each of the side frames 2 in the positions described above.

[0054] Regarding the support shafts 16a, 4a, and 15a, the support shafts 16a and 16a for supporting the main shaft 16 and the support shafts 4a and 4a for supporting the rocker shaft 4 are formed such that their axial dimension (length dimension) is greater than the thickness (width dimension) of the side frame. Furthermore, each support shaft 16a and 4a is rotatably supported on the inner wall 27 and outer wall 28 of the side frame 2 via bearings 22a, 22b, 22d, and 22e in a direction parallel to the aforementioned width direction. However, in this supported state on the side frame 2, each support shaft 16a and 4a is arranged such that one end protrudes from the inner wall 27 toward the aforementioned inner side.

[0055] Furthermore, the main shaft 16 is positioned between the two side frames 2 and 2, with its ends connected to the ends of the pair of support shafts 16a, 16a respectively located on one side. Therefore, the end of each support shaft 16a on one side becomes the connecting end 16c of that support shaft 16a relative to the main shaft 16. Similarly, the rocker shaft 4 is positioned between the two side frames 2 and 2, with its ends connected to the ends of the pair of support shafts 4a, 4a (connecting end 4c).

[0056] Furthermore, in the loom, the rocker arm 4 is driven to reciprocate by the rotating main shaft 16 (support shaft 16a). Thus, the support shaft 16a is mechanically connected to the support shaft 4a within the side frame 2 via a motion conversion mechanism (not shown) that converts rotational motion into oscillating motion. That is, the support shaft 4a supporting the rocker arm 4 and the support shaft 16a supporting the main shaft 16 are mechanically connected by the motion conversion mechanism. This motion conversion mechanism can be, for example, a crank mechanism or a cam mechanism.

[0057] Furthermore, the support shafts 15a and 15a for supporting the fabric roll 15 are formed as shaft members with a flange 15b at one end. Moreover, each support shaft 15a is rotatably supported relative to the inner wall 27 of the side frame 2 via a bearing 22c in a direction parallel to the width direction and with the flange 15b at the inner end being the inner side. Furthermore, the flange 15b of the support shaft 15a has a plurality of through holes through which fixing bolts 15c for connecting the fabric roll 15 are inserted.

[0058] Furthermore, the fabric roller 15 is positioned between the two side frames 2, 2, with its ends connected to a pair of support shafts 15a, 15a respectively. The fabric roller 15 is connected to the pair of support shafts 15a, 15a by threading a fixing bolt 15c, which passes through the through holes of each flange 15b, into a corresponding internally threaded hole formed on the end face of the fabric roller 15. Therefore, the flange 15b becomes the connecting end of the support shaft 15a relative to the fabric roller 15.

[0059] In the above-described loom, in this invention, at least one portion of the inner wall 27 of one or both of the pair of side frames that serves as the support position for the aforementioned support shafts 16a, 4a, 15a, i.e., the support portion, is formed as an offset support portion. This offset support portion positions the inner end of the bearing configured to support the support shaft corresponding to the support portion in a position further inward than the aforementioned reference position. Furthermore, this embodiment is an example where all the aforementioned support portions in both side frames 2, 2 are offset support portions 17. The detailed description of this embodiment of the loom is as follows.

[0060] In each side frame 2, as described above, each support shaft 16a, 4a, 15a is supported in a manner that protrudes inward. Therefore, through holes 23a, 23b, 23c are formed in the inner wall 27 of each side frame 2 to allow the protrusion of each support shaft 16a, 4a, 15a. Furthermore, the inner wall 27 of each side frame 2 is formed such that, when viewed along the width direction, the portion including the through holes 23a, 23b, 23c protrudes relative to the portion of the inner wall 27 including the reference surface 10. That is, the side frame 2 has a protrusion 17 that protrudes relative to the reference surface 10 within such a range. In addition, the thickness dimension (wall thickness) of the inner wall 27 is approximately the same, and the thickness dimension of the portion including the reference surface 10 is approximately the same as the thickness dimension of the portion of the protrusion 17 in which the through holes 23a, 23b, 23c are formed.

[0061] Furthermore, the support positions of the main shaft 16, the rocker shaft 4, and the fabric roll 15 relative to the front upper support bar 3a are as described above. Therefore, when viewed along the width direction, the range (range of the protrusion 17) including the positions where the support shafts 16a, 4a, and 15a are provided (i.e., the positions where the through holes 23a, 23b, and 23c are formed) includes the position where the front upper support bar 3a is mounted on the side frame 2.

[0062] Furthermore, the amount by which the protrusion 17 protrudes from the reference surface 10 (reference position) is greater than the thickness of the inner wall 27. Moreover, the portion surrounding the protrusion 17 within the aforementioned range is formed as a wall portion 29 extending along the width direction of the loom frame in a size corresponding to its protrusion amount.

[0063] Furthermore, the bearings 22a, 22b, and 22c used to support each of the support shafts 16a, 4a, and 15a are mounted on each of the side frames 2 via bearing cages 19, 20, and 21. Since the structures of each of the bearing cages 19, 20, and 21 are identical, the following description will use the bearing cage 19 used to support the support shaft 16a as an example.

[0064] like Figure 4 As shown, the bearing cage 19 is constructed with a cylindrical insert portion 19a having a through hole 19c as its main body. Furthermore, the bearing cage 19 has a flange portion 19b formed at one end in the axial direction of the insert portion 19a. The bearing 22a is disposed within the bearing cage 19 in the through hole 19c of the insert portion 19a. Therefore, the inner diameter of the through hole 19c in the insert portion 19a is a size that allows the bearing 22a to be accommodated when it is in the inserted state. Moreover, the axial dimension of the through hole 19c is larger than the width (thickness) dimension of the bearing 22a.

[0065] However, the through hole 19c is formed such that its inner diameter decreases at one end. That is, the through hole 19c is formed by a portion for housing the bearing 22a (housing portion) and a portion with a small diameter relative to one end of the housing portion (small diameter portion). Therefore, the insertion portion 19a has an end wall 19e at one end where the small diameter portion of the through hole 19c is formed. Moreover, the inner diameter of the small diameter portion of the through hole 19c formed in the end wall 19e is approximately the same as the outer diameter of the portion of the support shaft 16a that supports the bearing 22a. Furthermore, the length dimension of the housing portion in the through hole 19c in the axial direction is larger than the thickness dimension of the bearing 22a. Moreover, the bearing 22a is inserted into the housing portion in the through hole 19c and housed in the bearing cage 19 with one end face abutting against the end wall 19e.

[0066] Furthermore, the flange portion 19b is formed on one end side of the insert portion 19a as described above, and has a thickness dimension larger than the thickness dimension of the end wall 19e in the insert portion 19a. Moreover, the thickness dimension of the flange portion 19b is approximately the same as the difference in dimension in the axial direction of the bearing cage 19 (insert portion 19a) and the thickness dimension of the inner sidewall 27. Furthermore, a plurality of through holes are formed in the flange portion 19b for inserting bolts 25 to fix the bearing cage 19 to the side frame 2 (protrusion 17).

[0067] Furthermore, as described above, the bearing cage 19, with the bearing 22a housed, is fixed to the side frame 2 by having its insert portion 19a inserted into the through hole 23a. Therefore, the through hole 23a is formed with an inner diameter corresponding to the outer diameter of the insert portion 19a. The bearing cage 19 is fixed to the side frame 2 by threading a fixing bolt 25, which passes through the through hole in the flange portion 19b, into an internally threaded hole formed on the inner surface 9 of the corresponding protrusion 17.

[0068] Thus, in the loom of this embodiment, the main shaft 16 is supported on each side frame 2 via each support shaft 16a. Each support shaft 16a is supported by a bearing retainer 19 fixed to the side frame 2 and a bearing 22a housed in the bearing retainer 19, which is fitted into the through hole 23a. Therefore, in this loom, the portion forming the through hole 23a becomes a support portion in the inner wall 27 of the side frame 2 for supporting the support shaft 16a of the main shaft 16.

[0069] Furthermore, in the inner wall 27, the through hole 23a is formed in the protrusion 17, and in the bearing cage 19 constructed as described above, the inner end of the housed bearing 22a (the inner end of the bearing 22a's support position and the end face of the end wall 19e on the bearing 22a side) is located inside the protrusion 17 compared to the inner surface 9 of the protrusion 17. Therefore, the portion of the bearing cage 19 that supports the support shaft 16a, i.e., the support portion in the inner wall 27, corresponds to the offset support portion described in this invention.

[0070] Furthermore, in the loom of this embodiment, the amount by which the protrusion 17 protrudes relative to the aforementioned reference position is, as described above, an amount greater than the thickness of the inner sidewall 27. Therefore, the side of the protrusion 17 facing the inner side of the side frame 2 is positioned inside the aforementioned reference position in the width direction. Moreover, the difference between the thickness of the flange portion 19b of the bearing cage 19 mounted on the protrusion 17 and the axial dimension of the bearing cage 19 is approximately the same as the thickness of the inner sidewall 27. In other words, the axial dimension of the portion of the bearing cage 19 excluding the flange portion 19b is approximately the same as the thickness of the inner sidewall 27.

[0071] Therefore, the position of the end edge of the bearing cage 19 opposite to the flange 19b side is the same as the position of the inward-facing side of the protrusion 17 in the aforementioned width direction. Moreover, since the bearing 22a is supported in such a bearing cage 19, the support position of the bearing 22a is entirely inward compared to the aforementioned reference position.

[0072] Furthermore, the support for the support shaft 16a used to support the main shaft 16 has been described above, but in the loom of this embodiment, as... Figure 5 As shown, each support shaft 4a for supporting the rocker shaft 4 and each support shaft 15a for supporting the fabric roll 15 are also mounted to each side frame 2 via bearing cages 20 and 21, which have the same structure as the bearing cage 19, as described above. Furthermore, each bearing cage 20 is fixed to the side frame 2 by being inserted into a through hole 23b formed in the inner side wall 27 of the side frame 2, and each bearing cage 21 is fixed to the side frame 2 by being inserted into a through hole 23c formed in the inner side wall 27. Therefore, the portion of the inner side wall 27 with the through hole 23b becomes a support portion for supporting the support shaft 4a, and the portion with the through hole 23c becomes a support portion for supporting the support shaft 15a.

[0073] Furthermore, the through holes 23b and 23c are also formed in the same way as the through hole 23a in the protrusion 17 of the inner wall 27 of the side frame 2. Therefore, the support portion for supporting the support shaft 4a and the support portion for supporting the support shaft 15a in the inner wall 27 are also equivalent to the offset support portion mentioned in this invention. Moreover, the support shaft 4a is supported by the bearing 22b housed in the bearing cage 20, and the support shaft 15a is supported by the bearing 22c housed in the bearing cage 21. However, the support positions of each bearing 22b and bearing 22c are the same as those of the bearing 22a housed in the bearing cage 19, and all of them are on the inner side compared to the above-mentioned reference position.

[0074] Furthermore, in the loom of this embodiment, the support shaft 16a for supporting the main shaft 16 and the support shaft 4a for supporting the rocker shaft 4 are supported on the inner wall 27 of the side frame 2 in the manner described above, but also on the outer wall 28. Therefore, through holes 23d for arranging the bearing 22d supporting the support shaft 16a and through holes 23e for arranging the bearing 22e supporting the support shaft 4a are formed on the outer wall 28 of each side frame 2.

[0075] Furthermore, bearing cages 30 and 31 for supporting bearings 22d and 22e are installed in each of the through holes 23d and 23e. The structure of each bearing cage 30 and 31 is the same as that of the bearing cage 19, etc., and their installation relative to the outer side walls 28 (through holes 23d and 23e) is also the same as that of the bearing cage 19, etc. Furthermore, bearing 22d is installed in the through hole 23d of each side frame 2 in the form of bearing cage 30, and bearing 22e is installed in the through hole 23e of each side frame 2 in the form of bearing cage 31. Moreover, on the outer side wall 28 of each side frame 2, support shaft 16a is supported by bearing 22d, and support shaft 4a is supported by bearing 22e.

[0076] As described above, in the loom of this embodiment, all the aforementioned support portions provided on the inner sidewalls of the two side frames 2, 2 are formed as offset support portions as described above, and the positions of the inner ends of the bearings 22a, 22b, 22c disposed on each of the aforementioned support portions are on the inner side compared to the aforementioned reference position. Therefore, compared to the existing loom structure (existing structure) where the positions of the connecting ends 16c, 4c, 15b in each support shaft 16a, 4a, 15a are approximately the same as the aforementioned reference position, the positions of these connecting ends are more likely to be on the inner side. Consequently, the spacing between each pair of connecting ends 16c, 16c, 4c, 4c, 15b, 15b is smaller than in the existing structure. As a result, the length of each shaft component 16, 4, 15 mounted between the corresponding pair of support shafts is smaller than in the existing structure, making it less prone to bending. Therefore, the amplitude of the vibration generated by each shaft component 16, 4, 15 during weaving is smaller than in the existing structure.

[0077] Furthermore, each side frame 2 is formed such that a portion of its inner wall 27 protrudes relative to the reference plane 10, and the portion surrounding the protrusion 17 is formed as the aforementioned wall portion 29 in the width direction. As a result, compared with the existing structure in which the inner walls of the side frames are generally planar, the seismic resistance of the side frames 2 is improved.

[0078] Thus, in this embodiment, the entire configuration of the shaft components 16, 4, and 15, which serve as the vibration source of the side frame 2, results in a smaller amplitude of vibration during weaving compared to the conventional structure described above, and each side frame 2 itself exhibits improved shock resistance as described above. Therefore, according to this loom, compared to the conventional structure described above, the vibration generated by the entire loom frame during weaving is further suppressed, minimizing noise and other problems that adversely affect weaving.

[0079] In particular, regarding the rocker shaft 4, which vibrates violently during weaving due to the weft insertion motion, and the main shaft 16, which is mechanically connected to the rocker shaft 4, the support shaft 4a for supporting the rocker shaft 4 and the support shaft 16a for supporting the main shaft 16 are respectively configured as offset support parts as described above, thereby more effectively suppressing the vibration of the entire loom frame accompanying weaving.

[0080] Furthermore, in this loom, as described above, the support positions of all bearings 22a, 22b, and 22c in each offset support portion are positioned inside the aforementioned reference position. As a result, the wall portion 29 of each side frame 2 is larger, further increasing rigidity and more effectively achieving the aforementioned improvement in seismic resistance.

[0081] The above describes one embodiment of the loom of the present invention, but the loom of the present invention is not limited to the above embodiment and can also be implemented by the following modified examples.

[0082] (1) Regarding the offset support portion, in the loom of the above embodiment, the support positions of the bearings 22a, 22b, and 22c in each of the support portions forming the offset support portion are all located inside the reference position. However, in the loom of the present invention, the offset support portion is formed such that at least the inner end of the support position is located inside the reference position. That is, the offset support portion may also be formed such that the support position of its bearing overlaps with the reference surface 10 (the reference position) in the width direction.

[0083] For example, in a side frame constructed as described in the above embodiment, the protrusion 17 is formed such that the amount of protrusion from the aforementioned reference position is greater than the thickness of the inner sidewall 27. Alternatively, the protrusion 17 can be formed such that the amount of protrusion is less than the thickness of the inner sidewall 27. In this case, if the structure of each bearing cage 19, 20, 21 is the same as that in the above embodiment, the support position of each bearing 22a, 22b, 22c is such that it overlaps with the aforementioned reference position in the width direction.

[0084] Furthermore, in the above embodiment, each side frame is constructed such that all three support portions are offset support portions. Moreover, the protrusions 17 of each support portion are formed such that their inner surfaces 9 are flat, and the amount of protrusion is uniform throughout the entire structure. Therefore, the positions of all the support portions in the width direction are identical. Consequently, the support positions of each support portion supporting each bearing are also identical in the width direction. However, in the loom of the present invention, when multiple support portions are set as offset support portions, it is also possible to set a support portion (support position) where a portion of the support portion (support position) is positioned differently from the other support portions (support positions).

[0085] For example, in the case where all three support portions are offset support portions as in the above embodiment, the protrusion may be formed in such a way that the portion of the support portion for supporting the rocker shaft 4 (support shaft 4a) with the through hole 23b has a larger protrusion than the other portions. In this case, if the structure of each bearing cage 19, 20, 21 is the same as the structure in the above embodiment, the support position of the bearing 22b in the support portion for supporting the rocker shaft 4 (support shaft 4a) becomes a different position (the inner position) from the support position of the bearings in the support portions for supporting other shaft components 16, 15 (support shafts 16a, 15a).

[0086] (2) Furthermore, in the above embodiments, in the loom in which each side frame is constructed with all three of the above-described support portions as bias support portions, the portion of the inner sidewall 27 of each side frame that serves as a protrusion 17 is formed to cover the range including all portions that serve as each of the above-described support portions. That is, in the loom of the above embodiments, each side frame is formed such that a single protrusion 17 includes all of the above-described support portions that serve as bias support portions. However, in the loom of the present invention, when multiple of the above-described support portions are configured as bias support portions, a portion of the above-described support portions may be provided on a protrusion formed integrally with the protrusions of the other above-described support portions, and each of the above-described support portions (bias support portions) may also be provided on its respective corresponding protrusions.

[0087] For example, in the case where all three of the above-described support portions are offset support portions as in the above embodiment, the protrusions of each of the above-described support portions that support the main shaft 16 (support shaft 16a) and the rocker shaft 4 (support shaft 4a) located on the heald frame 11 side relative to the front upper support bar 3a, and the protrusions of the above-described support portions that support the fabric roll 15 (support shaft 15a) located on the take-up side relative to the front upper support bar 3a, may be formed as discontinuous and separate protrusions.

[0088] (3) In the above embodiment, regarding the shaft members (hereinafter referred to as "object shaft members") that serve as biased support members, all three shaft members serve as object shaft members. Furthermore, each side frame has a structure in which all three of the aforementioned support members serve as biased support members, with a protrusion on the inner wall. However, the loom of the present invention may also use one or two of the three shaft members as the aforementioned object shaft members. In this case, each side frame is configured such that the support members for supporting each of the aforementioned object shaft members serve as biased support members. That is, each side frame may also be formed such that the portion of the inner wall 27 that serves as one of the three aforementioned support members, including the area of ​​the support members for supporting the aforementioned object shaft members, serves as a protrusion.

[0089] (4) In the above embodiment, the two side frames 2, 2 are formed such that the portion of their inner sidewalls 27 including each of the aforementioned support portions is a protrusion, with the two support portions for supporting the three shaft components respectively serving as bias support portions. That is, the two side frames 2, 2 are structured such that the two support portions for supporting the aforementioned target shaft components are bias support portions, and the protrusions are formed on their inner sidewalls. However, in the loom of the present invention, even if only one of the two support portions for supporting the aforementioned target shaft components is a bias support portion, the effect of suppressing vibration can be obtained compared with conventional looms. Therefore, the side frames can also have protrusions formed on their inner sidewalls in the form that only one of the support portions for supporting the aforementioned target shaft components is a bias support portion.

[0090] However, when multiple shaft components are used as the aforementioned object shaft components, it is not limited to all the support portions used to support the object shaft components being identical. For example, when two shaft components are used as the aforementioned object shaft components, it is possible that for one of the aforementioned object shaft components, both of the support portions used to support that object shaft component are offset support portions, while for the other of the aforementioned object shaft components, only one of the support portions used to support that object shaft component is an offset support portion. Furthermore, even when only one of the multiple support portions used to support the aforementioned object shaft components is an offset support portion, the support portion serving as the offset support portion is not limited to all of the support portions in the same side frame.

[0091] It should be noted that the present invention is not limited to any of the embodiments described above, and appropriate modifications can be made without departing from its spirit.

Claims

1. A loom comprising a loom frame including a pair of side frames and a heald frame guide mounted on each of the side frames and guiding the up-and-down movement of heald frames, wherein a rocker shaft, a main shaft, and a take-up roller, mounted between the two side frames, are supported on each of the side frames via a support shaft, wherein the support shaft is supported at least via a bearing fitted into a support portion located on the inner side wall of the side frames, characterized in that... The inner wall of at least one of the aforementioned side frames is formed such that, in the width direction of the loom, after taking the position of the portion of the inner side surface of the inner wall that supports the heald frame guide in the warp direction as a reference position, at least one of the aforementioned support portions is an offset support portion that positions the inner end of the bearing support position inside the loom frame relative to the reference position.

2. The loom according to claim 1, characterized in that, The aforementioned support position is located inside the aforementioned reference position.

3. The loom according to claim 1 or 2, characterized in that, The aforementioned bias support portion is the support portion that supports the aforementioned support shaft connected to the aforementioned rocker shaft and / or the aforementioned main shaft.

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