Frame of a weaving machine

Abstract

A loom frame capable of improving the vibration resistance against beating vibration in a loom having a frame constituted by linking two side frames with a plurality of beam members. A loom frame including a pair of side frames and mounting beam members at mounting portions of inner sides of the side frames to constitute the frame by linking the two side frames with the plurality of beam members, and each side frame supporting a heald guide that guides the up-and-down movement of a heald frame of an opening device, wherein at least one of the pair of side frames is formed such that, after taking as a reference surface a portion of the inner side located at a position that supports the heald guide in the warp direction, the mounting portion for mounting at least one of the plurality of beam members is an offset mounting portion located on the inner side of the frame compared to the reference surface.

Description

Technical Field

[0001] The present invention relates to a frame for a loom, the frame of which includes a pair of side frames and a beam member mounted on the mounting portion of the inner side of each side frame, thereby connecting the two side frames by a plurality of beam members to form the frame, wherein each side frame supports a heald frame guide member for the up-and-down movement of the heald frame of the guiding sheathing device. Background Technology

[0002] For example, as disclosed in Patent Document 1, the frame in a typical loom is constructed by connecting a pair of side frames with multiple beam members. Specifically, the frame includes a pair of side frames in the shape of a box, and long beam members are installed on the inner surfaces of each side frame, thus forming a structure in which the two side frames are connected by multiple beam members.

[0003] 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 the form of side frames supported in the frame.

[0004] 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.

[0005] 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 frame is such that the spacing between the positions where the brackets are mounted (the positions that support the heald frame guides in the warp direction) achieves the aforementioned configuration of the heald frame guides, and is determined based on the spacing between the positions where the brackets are mounted according to the width of the heald frame.

[0006] 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.

[0007] Existing technical documents

[0008] Patent documents

[0009] Patent Document 1: Japanese Patent Application Publication No. 2004-084110 Summary of the Invention

[0010] The problem that the invention aims to solve

[0011] In such looms, it is known that because the reed's support shaft is supported by two side frames, these side frames vibrate violently during the weft-beating action (so-called weft-beating vibration). Furthermore, in such looms, the entire loom frame vibrates violently along with this weft-beating vibration. Especially in recent years, with the trend towards higher operating speeds, the vibration has become even more severe. Moreover, if the entire loom frame vibrates violently, the devices supporting that frame vibrate, sometimes causing adverse effects on the weaving process and reducing the quality of the woven fabric.

[0012] In view of the above-mentioned existing loom frames, the object of the present invention is to provide a frame that improves the shock resistance to the above-mentioned weft-beating vibrations in a loom having a frame consisting of two side frames connected by the above-mentioned multiple beam components.

[0013] Solution for solving the problem

[0014] The present invention is based on a loom frame comprising a pair of side frames, wherein the two side frames are connected by a plurality of beam members mounted on the inner side of each side frame to form the frame, wherein each side frame supports a heald frame guide member for the vertical movement of the heald frame of the guiding sheathing device, and wherein the plurality of beam members include two take-up side beam members, which are positioned differently in the vertical direction at positions closer to the take-up side than the heald frame guide member.

[0015] Furthermore, the present invention is characterized in that at least one of the pair of side frames is configured such that, after taking the portion of the inner side surface located at the position supporting the heald frame guide in the warp direction as a reference plane, the mounting portion of the upper take-up side beam member is an offset mounting portion located inside the frame relative to the reference plane.

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

[0017] According to the present invention, in a loom having a frame consisting of a plurality of beam members connected to a pair of side frames, at least one of the plurality of beam members (hereinafter referred to as the "objective beam member") is configured such that the mounting portion for mounting the object beam member is formed as an offset mounting portion located inside the width direction of the loom relative to the reference plane. This improves the frame's resistance to weft vibration. More details are as follows.

[0018] As described above, in the frame of the loom, the spacing between a pair of side frames is determined based on the spacing of the brackets corresponding to the heald frame guides. Furthermore, according to the present invention, in at least one of the pair of side frames whose spacing is determined in this way, the mounting portion for mounting the aforementioned target beam member is formed as an offset mounting portion located inside the aforementioned reference plane. Therefore, when the frame (side frame) is configured in this way, the length dimension of the target beam member is smaller compared to the case where the frame is configured as in the prior art.

[0019] Furthermore, by reducing the length dimension in this way, the beam members are less prone to deflection in the vertical and horizontal directions and the front-back directions of the frame. As a result, the frame as a whole, formed by connecting the side frames with such beam members, is less prone to vibration in the vertical and horizontal directions and the front-back directions. That is, the seismic resistance of the frame is improved. Therefore, according to such a frame, even if the aforementioned weft-beating vibration occurs in the frame of an existing structure, the vibration of the frame as a whole is minimized, thereby preventing the degradation of the fabric quality caused by vibration.

[0020] Furthermore, in the frame of the loom of the present invention, the aforementioned target beam member is made to be the upper beam member of the two take-up side beam members whose positions are different in the vertical direction. That is, the offset mounting part is the aforementioned mounting part for mounting the upper beam member, thereby enabling a more effective improvement in the seismic resistance of the frame.

[0021] In detail, in a typical loom, the support position of the rocker arm that generates weft-beating vibration in the side frame is the take-up side of the frame relative to the heald frame guide in the front-back direction. Therefore, in the front-back direction, the beam member on the take-up side relative to the heald frame guide (i.e., the take-up side beam member) is more susceptible to weft-beating vibration than the beam member on the feed side relative to the heald frame guide (i.e., the feed side beam member) because it is closer to the rocker arm. Furthermore, each side frame is securely fixed to the loom's mounting surface by anchor bolts. Therefore, the upper portion of each side frame is more prone to vibration than the lower portion. As a result, when comparing two beam members positioned differently in the front-back direction, the upper beam member is more susceptible to weft-beating vibration than the lower beam member.

[0022] In summary, by selecting the upper beam component among the aforementioned beam components that is susceptible to weft vibration, namely the upper beam component of the winding side beam component, the seismic resistance of the frame can be improved more effectively. Attached Figure Description

[0023] Figure 1 This is a top view of the frame of the loom to which the present invention is applied.

[0024] Figure 2 yes Figure 1 AA sectional view.

[0025] Figure 3 yes Figure 1 A magnified 3D view of a portion of the frame of a loom.

[0026] Figure 4 yes Figure 1 A partially enlarged sectional view of the frame of the loom.

[0027] Symbol Explanation

[0028] 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, 5—Reed, 6—Warp beam, 7—Weaving beam support, 8—Take-up weaving beam, 9—Inner side, 10—Reference surface, 11—Heald frame, 12—Heald frame guide, 12b—Guide section, 14—Bracket, 15—Cloth roll roller, 15b—Pressure roller, 16—Main shaft, 17—Offset mounting section, 18—Offset mounting section, 19 —Bearing cage, 20—Bearing cage, 20a—Embedded part, 20b—Flange part, 20c—Through hole, 20e—End wall, 21—Bearing cage, 22a—Bearing, 22b—Bearing, 22c—Bearing, 23a—Through hole, 23b—Through hole, 23c—Through hole, 25—Bolt, T—Warp yarn, W—Weaving fabric, B—Weaving width direction, E—Warp direction (front and back direction), F—Feed-out side, G—Take-up side. Detailed Implementation

[0029] The following is based on Figures 1-4 An embodiment of the frame of the loom to which the present invention is applied (this embodiment) will be described.

[0030] 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).

[0031] 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.

[0032] 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 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 surface 9 of the corresponding side frame 2.

[0033] 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 surface 9 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 inwards towards the loom. However, regarding its mounting position, in the aforementioned front-rear direction, the support shaft 14b is approximately at the center of the side frame 2.

[0034] Furthermore, each heald frame guide 12 is supported on 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 side frame 2.

[0035] 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.

[0036] 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 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.

[0037] 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 is a component with 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, whose spacing is set in this way, is also determined based on the spacing between the side frames 2, 2.

[0038] 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.

[0039] 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 fixing bolts, which are inserted into the through holes of each flange, are then inserted into through holes formed on the inner surface 9 of the corresponding side frame 2, and nuts are threaded onto these fixing bolts, thereby fixing the front upper support bar 3a and the rear upper support bar 3c relative to each side frame 2 (inner surface 9). In this way, the front upper support bar 3a and the rear upper support bar 3c are fixed to the mounting portions, i.e., the mounting parts, already set in the inner surface 9 of each side frame 2, thereby connecting the two side frames 2, 2.

[0040] Furthermore, the front lower support bar 3b and the rear lower support bar 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 pass through the through holes in each end wall, are 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 bar 3b and the rear lower support bar 3d relative to each side frame 2 (inner surface 9). In this way, the front lower support bar 3b and the rear lower support bar 3d are fixed to the mounting portions, i.e., the mounting parts, already set in the inner surface 9 of each side frame 2, thereby connecting the two side frames 2, 2.

[0041] The main shaft 16 in the loom is supported at both ends by 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.

[0042] 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 shaft 4 by multiple reed feet, etc. Moreover, the rocker shaft 4 is supported at both ends by two side frames 2, 2 in a direction parallel to the aforementioned width direction. In addition, the support position of the rocker shaft 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.

[0043] 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 pair of pressure rollers 15b, 15b pressed against the take-up roller 15 by a pressing mechanism (not shown). The take-up roller 15 is supported at both ends by 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.

[0044] In the frame 1 of the loom described above, in this invention, at least one of the plurality of mounting portions of one or both of the pair of side frames is formed as an offset mounting portion located inside the frame 1 relative to the reference plane 10. Furthermore, in this embodiment, the mounting portions of the front upper support bar 3a and the rear upper support bar 3c in the two side frames 2, 2 are examples of such offset mounting portions. The detailed description of the frame 1 of the loom according to this embodiment is as follows.

[0045] In each side frame 2, the portion of its inner surface 9 that forms the area of ​​the mounting portion when viewed along the aforementioned width direction is formed protruding relative to the portion including the reference surface 10, so that the mounting portion for mounting the front upper support bar 3a is located inside the frame 1 relative to the reference surface 10. As a result, this mounting portion becomes the portion whose position is inside the frame 1 relative to the reference surface 10, becoming the offset mounting portion 17 described in this invention. That is, in this embodiment, the mounting portion for mounting the front upper support bar 3a becomes the (first) offset mounting portion 17.

[0046] Furthermore, in the inner surface 9 of each side frame 2, the mounting portion for mounting the rear upper support bar 3c is also formed such that the portion encompassing the mounting portion protrudes relative to the portion including the reference surface 10 when viewed along the width direction, so that the mounting portion is located inside the frame 1 relative to the reference surface 10. As a result, the portion whose position is located inside the frame 1 relative to the reference surface 10 becomes the offset mounting portion 18 described in this invention. That is, in this embodiment, the mounting portion for mounting the rear upper support bar 3c also becomes the (second) offset mounting portion 18.

[0047] Furthermore, in this embodiment, when viewed along the aforementioned width direction, the mounting portion for mounting the front upper support bar 3a, namely the first offset mounting portion 17, is formed not only in the portion where the front upper support bar 3a is mounted, but also extends over a larger area. Specifically, the first offset mounting portion 17 extends beyond the portion where the front upper support bar 3a is mounted, covering the range of each support position including the main shaft 16, the rocker shaft 4, and the fabric roll 15.

[0048] Therefore, through holes 23a, 23b, and 23c are formed on the inner sidewalls (inner sidewalls) of each side frame 2, corresponding to the first offset mounting portion 17. Bearings 22a, 22b, and 22c for supporting the main shaft 16, the rocker shaft 4, and the fabric rolling roller 15 are arranged in the through holes 23a, 23b, and 23c. Bearing cages 19, 20, and 21 for arranging the bearings 22a, 22b, and 22c are installed in each through hole 23a, 23b, and 23c. Furthermore, the main shaft 16, the rocker shaft 4, and the fabric rolling roller 15 are supported by the bearings 22a, 22b, and 22c arranged in each side frame 2 by the bearing cages 19, 20, and 21, and are supported by the two side frames 2.

[0049] Regarding the bearing cages 19, 20, and 21, their structures are all identical. Therefore, the bearing cage 20 used for the rocker shaft 4 will be described as an example. This bearing cage 20 is mainly composed of a cylindrical insert portion 20a with a through hole 20c. Furthermore, this bearing cage 20 has a flange portion 20b formed on one end side in the axial direction of the insert portion 20a.

[0050] Furthermore, regarding the insert portion 20a, the inner diameter of its through hole 20c is the size for housing the bearing 22b in the mounted state. However, the inner diameter of the through hole 20c in the insert portion 20a decreases at the aforementioned end side. That is, the through hole 20c is formed by a portion for housing the bearing 22b (housing portion) and a smaller diameter portion relative to the aforementioned end side of the housing portion (small diameter portion). Therefore, the insert portion 20a has an end wall 20e at its end side where the small diameter portion of the through hole 20c is formed. However, the inner diameter of the small diameter portion of the through hole 20c formed in the end wall 20e is approximately the same size as the outer diameter of the shaft portion in the rocker shaft 4 that serves as the support for the bearing 22b.

[0051] Furthermore, the flange portion 20b is formed on one end side of the insertion portion 20a as described above, and its thickness is formed to be thicker than the thickness of the end wall 20e of the insertion portion 20a. Specifically, the thickness of the flange portion 20b is formed such that the difference between its thickness and the thickness of the end wall 20e is approximately 1 / 2 the width of the bearing 22b. Moreover, a plurality of through holes are formed in the flange portion 20b for bolts 25 to be inserted to fix the bearing cage 20 to the side frame 2 (first offset mounting portion 17).

[0052] Furthermore, the bearing cage 20 is fixed to the side frame 2 with its insert portion 20a fitted into the through hole 23b. Therefore, the through hole 23b is formed such that its inner diameter corresponds to the outer diameter of the insert portion 20a. The bearing cage 20 is fixed to the side frame 2 by threading a fixing bolt 25, which passes through the through hole in the flange portion 20b, into an internally threaded hole formed in the corresponding offset mounting portion 17.

[0053] Furthermore, the bearing 22b is fitted into the aforementioned receiving portion in the through hole 20c, and is housed within the bearing cage 20 with one end abutting against the end wall 20e. In this housed state, the center of the bearing 22b's width in the aforementioned axial direction is approximately aligned with the end face of the flange portion 20b in the bearing cage 20 facing the other end. Therefore, with the bearing cage 20 mounted on the side frame 2 as described above, the center of the bearing 22b's width in the width direction of the loom is approximately aligned with the position of the offset mounting portion 17 in the side frame 2. That is, according to this structure, the position of the bearing 22b supporting the shaft portion of the rocker shaft 4 in the aforementioned width direction, i.e., the support position of the rocker shaft 4, is the inner position of the frame 1 compared to the case where the same bearing cage is mounted on the side frame 2 with the flange abutting against the reference surface 10.

[0054] As described above, in the frame 1 of the loom in this embodiment, the mounting portions for mounting the front upper support bar 3a and the rear upper support bar 3c in the two side frames 2, 2 are formed as the aforementioned offset mounting portions 17, 18. Therefore, the length dimensions of the front upper support bar 3a and the rear upper support bar 3c are smaller compared to existing frames where these mounting portions are formed in the width direction at the same position as the reference plane 10. Consequently, compared to frames constructed in the prior art, the front upper support bar 3a and the rear upper support bar 3c are less prone to bending in the vertical and horizontal directions, and consequently, the overall structure is less prone to vibration in the vertical and horizontal directions, improving its resistance to weft vibration.

[0055] Furthermore, in this embodiment, the mounting portion for mounting the front upper support rod 3a is formed as an offset mounting portion 17, and the mounting portion for mounting the upper beam member 3a of the two winding side beam members 3a and 3b, which are positioned differently in the vertical direction, is also formed as an offset mounting portion 17. Thus, in the frame 1, the front upper support rod 3a, which is more susceptible to weft vibration, is less prone to bending as described above, thereby more effectively improving its seismic resistance.

[0056] Furthermore, in this embodiment, when the front upper support bar 3a is used as the aforementioned object beam component, the offset mounting portion 17 extends beyond the portion where the front upper support bar 3a is mounted, covering all support positions including the main shaft 16, the rocker shaft 4, and the fabric roll 15, when viewed along the width direction. Each side frame 2 is formed such that the portion of its inner side surface 9 that protrudes from the mounting portion for mounting the front upper support bar 3a relative to the portion including the reference surface 10. As a result, compared to the case where the portion of each side frame 2 that only covers the area of ​​the mounting portion when viewed along the width direction protrudes from the reference surface 10, the offset mounting portion 17 has a larger dimension in the front-rear direction, and therefore the portion including the inner sidewall of the mounting portion is less prone to bending in the front-rear direction.

[0057] Furthermore, in this embodiment, the offset mounting portion 17 is formed such that its protruding part is a flat surface, and the aforementioned protrusion is the same throughout its entirety, with the same amount of protrusion relative to the front and rear portions of the mounting portion. Therefore, even if each side frame 2 protrudes more than the portion including the reference surface 10 relative to the front and rear portions of the mounting portion, compared to a case where the protrusion amounts relative to the front and rear portions of the mounting portion differ, the portion including the inner wall of the mounting portion is less prone to flexing in the front-rear direction. Thus, the frame 1 becomes a structure where each side frame 2 itself is less prone to flexing as described above, thereby more effectively improving its seismic resistance.

[0058] Furthermore, in this embodiment, the mounting portion for installing the upper support bar 3c is formed as an offset mounting portion 18, and the mounting portion for installing the upper beam member 3c of the two feed side beam members 3c and 3d, which are positioned differently in the vertical direction, is also formed as an offset mounting portion 18. Therefore, the frame 1 can also more effectively improve its shock resistance to warp beam vibration.

[0059] Incidentally, regarding the warp beam vibration, it is known in looms that during one weaving cycle, the tension of the warp yarn T fluctuates due to shedding and beating-up actions. This tension fluctuation becomes an excitation force, sometimes causing vibration in the warp beam 6 in both its rotational direction and the lead-out direction (vertical direction) of the warp yarn T. Furthermore, this warp beam vibration acts as an excitation force on each side frame 2 on the feed side, thus the upper rear support bar 3c and the lower rear support bar 3d, as feed side beam components, are easily affected by this warp beam vibration. However, since each side frame 2 is firmly fixed to the loom's mounting surface by anchor bolts, its upper portion is more prone to vibration than its lower portion. Therefore, when comparing two feed side beam components positioned differently in the vertical direction, the upper rear support bar 3c is more susceptible to warp beam vibration than the lower rear support bar 3d.

[0060] The above describes one embodiment of the frame of the loom of the present invention, but the frame of the loom of the present invention is not limited to the above embodiment and can also be implemented by the following modified examples.

[0061] (1) Regarding the offset mounting portion 17 when the front upper support bar 3a is used as the aforementioned target beam component, in the above embodiment, the offset mounting portion 170 covers a range including the main shaft 16, the rocker shaft 4, and the take-up roller 15, in addition to the portion where the front upper support bar 3a is installed, when viewed along the width direction. However, in the frame of the loom of the present invention, the offset mounting portion can be formed at least within the range where the target beam component is installed. Therefore, even when the front upper support bar 3a is used as the aforementioned target beam component as described above, the offset mounting portion can cover the range where only the front upper support bar 3a is installed, or it can cover the range including two or one of the aforementioned support positions.

[0062] (2) In the above embodiment, the mounting portion used for mounting the front upper support bar 3a and the rear upper support bar 3c is used as the offset mounting portion 17 and 18 of the present invention. That is, the upper beam members 3a and 3c of the two beam members 3a and 3b on the take-up side and the two beam members 3c and 3d on the feed side are used as the target beam members, and their mounting portions are used as offset mounting portions 17 and 18. However, in the frame of the loom of the present invention, the frame can be a structure in which at least one of the multiple beam members connecting the two side frames 2 and 2 is used as the target beam member and the mounting portion used for mounting the target beam member is used as the offset mounting portion.

[0063] Therefore, for example, in the case of a frame 1 configured as described in the above embodiment, the two beam members 3a, 3b on the winding side and / or the two beam members 3c, 3d on the delivery side can be used instead of the upper beam members 3a, 3c being the target beam members, and the lower beam members 3b, 3d being the target beam members, with their mounting portions being offset mounting portions. Furthermore, only one of the beam members on the winding side and the delivery side can be used as the target beam member, with its mounting portion being an offset mounting portion. Further, all beam members 3a, 3b, 3c, 3d in the frame 1 can be used as the target beam members, and all of their mounting portions can be offset mounting portions.

[0064] (3) Furthermore, in the above embodiment, in both of the pair of side frames 2, 2, the mounting portion used for mounting the object beam component is used as the offset mounting portion of the present invention. That is, both of the mounting portions on both sides used for mounting the object beam component are used as offset mounting portions. However, in the frame of the loom of the present invention, the frame may also be a structure in which only one of the two mounting portions used for mounting the object beam component is used as an offset mounting portion.

[0065] However, when two or more beam members are used as the target beam members as in the above embodiment, it is not limited to the mounting portions of all the target beam members being formed identically as in the above embodiment. The mounting portion used to mount a portion of the target beam members may also be different from the mounting portion used to mount the other target beam members. For example, when two beam members are used as the target beam members as in the above embodiment, both mounting portions used to mount one of the target beam members may be offset mounting portions, and only one of the mounting portions used to mount the other target beam member may be an offset mounting portion.

[0066] Furthermore, if the mounting portion used to mount two or more of the aforementioned object beam components is an offset mounting portion in only one of them, the mounting portion serving as the offset mounting portion is not limited to the mounting portion in the side frame that is on the same side in all cases. The offset mounting portion used to mount a portion of the aforementioned object beam components may also be the mounting portion in the side frame on the opposite side to the offset mounting portion used to mount other aforementioned object beam components.

[0067] (4) In the above embodiments, the frame 1 of the loom to which the present invention is applied has a structure in which two side frames 2 are connected by four beam components 3a, 3b, 3c, and 3d. However, depending on the loom, the frame may also have three or fewer beam components connecting the two side frames or five or more beam components. Moreover, the present invention can also be applied to the frame of such a loom.

[0068] Furthermore, 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 frame for a loom, comprising a pair of side frames, wherein the two side frames are connected by a plurality of beam members mounted on mounting portions on the inner surfaces of each side frame to form the frame, each side frame supporting a heald frame guide member for vertical movement of the heald frame of a guiding sheathing device, and wherein the plurality of beam members include two take-up side beam members, the two take-up side beam members being positioned differently in the vertical direction at positions relative to the take-up side of the heald frame guide member, characterized in that... At least one of the aforementioned side frames is configured such that, after taking the portion of the inner side surface located at the position supporting the heald frame guide in the warp direction as a reference plane, the mounting portion of the upper take-up side beam component is an offset mounting portion located inside the frame relative to the reference plane.

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