Wedge structure

Abstract

To provide a wedge structure capable of being widely applied to uniting with a rod-shaped member.SOLUTION: A wedge structure 21 is united to a rod-shaped member 11. The wedge structure 21 is equipped with a wedge receiver 23 that has a hold in which the rod-shaped member 11 can be inserted, a wedge 22 that is inserted in the wedge receiver 23 while containing the rod-shaped member 11, and a rotation suppressing mechanism 50 that suppresses rotations of the wedge receiver 23 with respect to the rod-shaped member 11. The rotation suppressing mechanism 50 is composed of a projecting portion 52 provided on an outer periphery of the wedge 22, and a recessed portion 53 provided on an inner periphery of the wedge receiver 23. The projecting portion 52 and the recessed portion 53 correspond to each other.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a wedge structure coupled to a rod-shaped member.

Background Art

[0002] For example, in a factory such as a steelworks, a bag filter type dust collector is provided. Retainers support bag-shaped filter cloths, and by arranging a plurality of these, a bag filter type dust collector is formed. The bag filter type dust collector collects dust contained in exhaust gas from a factory or the like with the filter cloth. The gas that has passed through the filter cloth is discharged to the outside.

[0003] Generally, the exhaust gas from a factory is at high temperature and high pressure, and a one-way flow from inside the factory to the outside air is formed. As a result, dust accumulates on the outer surface of the filter cloth, causing clogging.

[0004] Therefore, appropriately, a pulse jet is injected to form a reverse flow and remove the dust on the outer surface of the filter cloth. The fallen dust is collected and discharged. This prevents clogging.

[0005] Generally, a retainer is formed from a plurality of vertical wire members arranged in the circumferential direction and a plurality of ring members that connect the plurality of vertical wire members and are arranged in the vertical direction, and has a cylindrical and cage-like shape. The vertical wire members and the ring members are made of metal, and the vertical wire members and the ring members are fixed by welding (Patent Document 1).

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] In addition, the exhaust gas contains harmful components, which may cause the retainer to corrode (rust). As a result, it becomes an obstacle when replacing the filter cloth. Furthermore, when the corrosion progresses, it is necessary to discard the retainer itself. In this case, it is necessary to disassemble separately, and the maintenance burden is also large. Moreover, since the metal retainer corrodes early and the replacement frequency increases, the life cycle cost burden is also large.

[0008] Therefore, coating a wire (or rod-shaped member) with resin has been considered. On the other hand, it is difficult to weld a resin-coated wire. Also, the work burden of disassembling the welded wire is large.

[0009] The present invention solves the above problems, and an object thereof is to provide a means that can be simply and surely coupled to a rod-shaped member (or wire).

Means for Solving the Problems

[0010] The present invention of the present application for solving the above problems is a wedge structure coupled to a rod-shaped member. It includes a wedge receiving portion having a hole through which the rod-shaped member can be inserted, a wedge portion inserted into the wedge receiving portion while enclosing the rod-shaped member, and a rotation suppressing mechanism that suppresses the rotation of the wedge receiving portion with respect to the rod member.

[0011] Thereby, it can be simply and surely coupled to the rod-shaped member. For example, it has excellent workability compared to conventional coupling structures such as welding, and disassembly and the like are also easy.

[0012] Furthermore, even when rotation around the rod-shaped member occurs in the wedge structure, the rotation suppressing mechanism functions to suppress the rotation. And it suppresses the unintentional release of the wedge structure.

[0013] In the above invention, preferably, the rotation suppressing mechanism includes a convex portion or concave portion on the wedge portion side provided on the outer periphery of the wedge portion, and a concave portion or convex portion on the wedge receiving portion side provided on the inner periphery of the wedge receiving portion corresponding to the convex portion or concave portion on the wedge portion side.

[0014] Thereby, the rotation suppressing mechanism functions.

[0015] In the above invention, preferably, the rotation suppression mechanism includes a wedge portion side protrusion or a wedge portion side hole provided on the inner circumference of the wedge portion, and a rod member side hole or a rod member side protrusion provided on the outer circumference of the rod member corresponding to the wedge portion side protrusion or the wedge portion side hole.

[0016] Thereby, the rotation suppression mechanism functions.

[0017] In the above invention, preferably, the convex portion on the wedge portion side functions as a leaf spring by being partially separated from the wedge portion main body through a notch, or the convex portion on the wedge receiving portion side functions as a leaf spring by being partially separated from the wedge receiving portion main body through a notch.

[0018] When the leaf spring functions, the function of the rotation suppression mechanism is improved.

[0019] In the above invention, preferably, a claw portion is provided at the tip of the leaf spring formed by the convex portion on the wedge portion side, and the claw portion is locked to the end face of the wedge receiving portion, or a claw portion is provided at the tip of the leaf spring formed by the convex portion on the wedge receiving portion side, and the claw portion is locked to the end face of the wedge portion.

[0020] When the claw is locked to the end face of the wedge portion, an unintended release of the wedge structure is suppressed.

[0021] In the above invention, preferably, an extension portion is provided at the tip of the leaf spring formed by the convex portion on the wedge portion side, the extension portion has flexibility, is folded back, and can be inserted into the gap formed between the wedge portion and the rod member.

[0022] When the extension portion is inserted into the gap, the generation of play in the gap is suppressed, and the wedge portion reliably holds the rod member.

[0023] In the above invention, preferably, the wedge portion is formed by two halves facing each other, a protrusion is provided at the center of the end face of either of the two halves, and the end faces of the two halves face each other through the protrusion.

[0024] As a result, the two semi - bodies operate like a balance with the protrusion as a fulcrum. As a result, it becomes easier to insert and securely holds the rod - shaped member.

[0025] In the above - mentioned invention, preferably, the rod - shaped member is resin - coated or is a resin - based material containing fiber - reinforced plastic.

[0026] In the present application, different from conventional coupling structures such as welding, it can also be coupled to a rod - shaped member such as a resin - based one. However, the rod - shaped member is not limited to resin - based ones.

[0027] The invention of the present application for solving the above problems is a wedge structure coupled to a rod - shaped member. The wedge structure includes a wedge receiving portion having a hole through which the rod - shaped member can be inserted, a first wedge portion inserted into the wedge receiving portion from one side while enclosing the rod - shaped member, and a second wedge portion inserted into the wedge receiving portion from the other side while enclosing the rod - shaped member.

[0028] As a result, it can be simply and surely coupled to the rod - shaped member. For example, it has excellent workability compared to conventional coupling structures such as welding, and disassembly etc. is also easy.

[0029] Furthermore, when the wedge receiving portion operates so that the first wedge portion comes out, the second wedge portion counteracts. When the wedge receiving portion operates so that the second wedge portion comes out, the first wedge portion counteracts. As a result, an unintended release of the wedge structure is suppressed.

[0030] In the above - mentioned invention, preferably, it further includes a fixing member that suppresses the head of the first wedge portion and the head of the second wedge portion.

[0031] The fixing member suppresses the first wedge portion and the second wedge portion from coming out. As a result, an unintended release of the wedge structure is suppressed.

[0032] In the above invention, preferably, a fixing member is further provided, which has a first restraining portion for restraining the head of the first wedge portion, a second restraining portion for restraining the head of the second wedge portion, and a connecting portion for connecting the first restraining portion and the second restraining portion.

[0033] Due to the connecting portion, the operation of the first wedge portion coming off is transmitted, the second wedge portion functions, the operation of the second wedge portion coming off is transmitted, and the first wedge portion functions.

[0034] In the above invention, preferably, the cross-sections of the first wedge portion and the second wedge portion are annular (substantially C-shaped) with partial cutouts, and the cutout of the first wedge portion and the cutout of the second wedge portion are arranged at corresponding positions.

[0035] By using a wedge with a substantially C-shaped cross-section, it can be pushed into the rod-shaped member from the side, and the workability is high.

[0036] By arranging the cutout of the first wedge portion and the cutout of the second wedge portion at corresponding positions, the directionality of the rod-shaped member can be maintained.

[0037] In the above invention, preferably, the wedge receiving portion has positioning means for determining the cutout position of the first wedge portion and the cutout position of the second wedge portion.

[0038] Thereby, the cutout of the first wedge portion and the cutout of the second wedge portion can be arranged at corresponding positions.

[0039] In the above invention, preferably, the positioning means is a protrusion provided at the end of the wedge receiving portion, and the protrusion corresponds to the cutout position of the first wedge portion and the cutout position of the second wedge portion, and suppresses the rotation of the wedge receiving portion with respect to the rod member.

[0040] Positioning can be achieved by the correspondence between the protrusion and the cutout. The correspondence between the protrusion and the cutout functions as a rotation suppression mechanism as a result.

[0041] In the above invention, preferably, the rod-shaped member is resin-coated or is a resin-based material including fiber-reinforced plastic.

[0042] In the present application, due to being different from conventional coupling structures such as welding, it can also be coupled to a rod-shaped member such as a resin-based one. However, the rod-shaped member is not limited to the resin-based one.

Advantages of the Invention

[0043] The wedge structure of the present invention can be simply and surely coupled to a rod-shaped member. For example, it is excellent in workability compared with conventional coupling structures such as welding, and disassembly, etc. is also easy.

Brief Description of the Drawings

[0044]

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Modes for Carrying Out the Invention

[0045] ~Basic Configuration of the First Embodiment of the Wedge Structure~ FIG. 1 is a schematic diagram of the wedge structure according to the first embodiment. The wedge structure 21 is formed by a wedge 22 and a wedge receiver 23 having an opening. The wedge 22 is inserted into the wedge receiver 23.

[0046] The wedge 22 is formed in a substantially cylindrical shape that tapers slightly by opposing two halves. Note that unevenness is provided on the end faces of the halves, and the unevenness meshes when the halves oppose each other. At this time, the wedge 22 encloses the rod-shaped member 11. In the opening of the wedge receiver 23, the rod-shaped member 11 can be inserted. The inside of the opening of the wedge receiver 23 also tapers corresponding to the shape of the wedge 22.

[0047] By the way, when the wedge 22 is inserted into the wedge receiver 23, the wedge structure 21 functions and is securely coupled to the rod-shaped member 11. However, the inventor of the present application has found that there is a risk that the wedge structure 21 may be unintentionally released due to the occurrence of rotation around the rod-shaped member 11.

[0048] In contrast, the wedge structure 21 has a rotation suppression mechanism 50. The rotation suppression mechanism 50 includes a convex portion 52 provided on the outer circumference of the wedge 22 and a concave portion 53 provided on the inner circumference of the wedge receiver 23. When the convex portion 52 and the concave portion 53 correspond to each other, rotation of the wedge receiver 23 with respect to the rod-shaped member 11 is suppressed via the wedge 22.

[0049] The concavo-convex relationship between the convex portion 52 and the concave portion 53 may be reversed. In the illustration, two concavo-convex portions 52 and 53 are provided at opposite positions on the circumference, respectively. However, if there is one or more concavo-convex relationships, it functions as the rotation suppression mechanism 50.

[0050] FIG. 2 is a detailed view of the half wedge 22. The rotation suppression mechanism 50 further includes a protrusion 54 provided on the inner circumference of the wedge 22 and a hole 55 (not shown) provided on the outer circumference of the rod-shaped member 11. When the protrusion 54 corresponds to the hole 55, rotation of the wedge 22 with respect to the rod-shaped member 11 is suppressed. As a result, rotation of the wedge receiver 23 with respect to the rod-shaped member 11 is suppressed.

[0051] The convex portion 52 is formed such that the cylindrical axis direction is the longitudinal direction, and is separated from a part of the wedge 22 main body via cuts 56 formed at both ends of the convex portion 52. Thereby, one end portion in the longitudinal direction of the convex portion 52 becomes a free end, and the convex portion 52 functions as a leaf spring.

[0052] The concave portion 53 is formed as a groove continuous from one end to the other end of the cylinder. When the wedge 22 is inserted into the wedge receiver 23, the convex portion 52 is guided into the concave portion 53.

[0053] A claw 57 is provided at the tip of the leaf spring formed by the convex portion 52. When the wedge 22 is inserted into the wedge receiver 23, the claw 57 is pressed from the groove 53, and the leaf spring 52 is pressed inward. When the wedge 22 is securely inserted to a predetermined position in the wedge receiver 23, the pressing force acting on the leaf spring 52 is released, and the elastic force of the leaf spring 52 acts so that the leaf spring 52 opens outward. At this time, the claw 57 is locked to the cylindrical end face of the wedge receiver 23. Thereby, it can be confirmed that the wedge 22 has been inserted into the wedge receiver 23 up to the predetermined position.

[0054] As a result, the wedge 22 is surely inserted into the wedge receiver 23. Consequently, the wedge structure 21 is surely coupled to the rod-shaped member 11. Even when rotation around the rod-shaped member 11 occurs in the wedge structure 21, the rotation suppression mechanism 50 functions to suppress the rotation. Then, an unintended release of the wedge structure 21 is suppressed.

[0055] ~Additional Operations of the First Embodiment of the Wedge Structure~ FIG. 3 is an explanatory diagram of additional operations according to the first embodiment. The wedge 22 is formed in a substantially cylindrical shape that tapers slightly by opposing two halves. A protrusion 58 is provided at the center of the end face of either of the two halves (see FIG. 2). As a result, the end faces of the two halves face each other via the protrusion 58. The two halves act like a balance with the protrusion 58 as a fulcrum.

[0056] When the wedge 22 is inserted into the wedge receiver 23, the claw 57 is pressed from the groove 53, and the tips of the two halves close (the ends open). This makes the insertion easier.

[0057] When the wedge 22 is surely inserted to a predetermined position in the wedge receiver 23, the leaf spring 52 acts to open outward. The ends of the two halves close (the tips open). As a result, the wedge 22 surely holds the rod-shaped member 11. At the same time, the wedge 22 is integrated with the wedge receiver 23. The wedge structure 21 is surely coupled to the rod-shaped member 11.

[0058] ~Modification of the First Embodiment of the Wedge Structure~ FIG. 4 is a perspective view (left) and a cross-sectional view (right) of the wedge structure according to the modification. The operation of the modification will be described based on FIG. 4.

[0059] When the wedge 22 is surely inserted to a predetermined position in the wedge receiver 23, the leaf spring 52 acts to open outward. As a result, a minute gap 61 is generated between the wedge 22 and the rod-shaped member 11 at the tips of the two halves. Even when the wedge 22 holds the rod-shaped member 11 at the ends of the two halves, play may occur in the gap 61, and the holding force may become insufficient.

[0060] In the modification, an extension portion 62 is provided at the tip of the long leaf spring 52. The extension portion 62 has flexibility. The extension portion 62 is folded back inward, and the folded tip can be inserted into the gap 61.

[0061] This suppresses the occurrence of play in the gap 61, and the wedge 22 surely holds the rod-shaped member 11.

[0062] ~Second Embodiment and Modification of Wedge Structure~ FIG. 5 is a schematic view of a wedge structure according to the second embodiment. The wedge structure 25 is formed of a wedge 26 and a wedge receiver 27 having an opening. The wedge 26 is inserted into the wedge receiver 27.

[0063] The wedge 26 is formed in a substantially tapered cylindrical shape with two halves facing each other. At this time, the wedge 26 encloses the rod-shaped member 12. In the opening of the wedge receiver 27, the rod-shaped member 12 can be inserted.

[0064] On the other hand, the wedge structure 25 has a rotation suppression mechanism 150. The rotation suppression mechanism 150 includes a convex portion 152 provided on the outer periphery of the wedge 25 and a concave portion 153 provided on the inner periphery of the wedge receiver 27. By the corresponding convex portion 152 and concave portion 153, rotation of the wedge receiver 27 with respect to the rod-shaped member 12 is suppressed via the wedge 26. And, an unintentional release of the wedge structure 25 is suppressed.

[0065] FIG. 6 is a schematic view of a wedge structure according to a modification of the second embodiment.

[0066] The wedge 26 of the second embodiment is formed in a substantially cylindrical shape with two halves facing each other, whereas the wedge 28 of the modification is an integral body.

[0067] The cross section of the wedge 28 is annular (substantially C-shaped) with a partial notch. Grips are provided on both upper sides of the notch.

[0068] Open the notch through the grip, and push the rod-shaped member 12 laterally through the temporarily widened notch. Due to the elastic action, the notch width also narrows. As a result, the wedge 28 encloses the rod-shaped member 12. In this state, there may be some play. The wedge receiver 27 is the same as in the second embodiment.

[0069] When the wedge 28 is inserted into the wedge receiver 27, the notch of the wedge 28 is tightened, and the wedge 28 securely holds the rod-shaped member 12.

[0070] The wedge structure in the modification also has a rotation suppression mechanism 150. The rotation suppression mechanism 150 consists of a convex portion 152 and a concave portion 153. Thereby, the rotation of the wedge receiver 27 with respect to the rod-shaped member 12 is suppressed via the wedge 28. And the unintentional release of the wedge structure 25 is suppressed.

[0071] FIG. 7 is a schematic view of a wedge structure according to another modification of the second embodiment.

[0072] The wedge 29 in another modification forms a slightly tapered substantially cylindrical shape as an integral body. The cross-section of the wedge 29 is annular (substantially O-shaped).

[0073] The rod-shaped member 12 is inserted through the substantially O-shaped interior of the wedge 29. As a result, the wedge 29 encloses the rod-shaped member 12. There may be some play between the wedge 29 and the rod-shaped member 12 so that it can move easily along the rod-shaped member 12.

[0074] A plurality (for example, three) of slits 155 are provided axially on the lower side of the wedge 29. Thereby, the peripheral wall between the slits functions as a leaf spring.

[0075] When the wedge 29 is inserted into the wedge receiver 27, the leaf spring of the wedge 29 is displaced to close in the radial direction, and the wedge 29 securely holds the rod-shaped member 12.

[0076] The wedge structure in the modification also has a rotation suppression mechanism 150. A plurality (for example, three) of protrusions 156 are provided on the inner wall of the wedge receiver 27 so as to correspond to the slit 155. The rotation suppression mechanism 150 is composed of the slit 155 and the protrusion 156, and the protrusion 156 and the slit 155 are fitted together. Thereby, the rotation of the wedge receiver 27 with respect to the rod-shaped member 12 is suppressed via the wedge 29. And the unintentional release of the wedge structure 25 is suppressed.

[0077] ~Basic Configuration of the Third Embodiment of the Wedge Structure~ FIGS. 8 and 9 are schematic views of the wedge structure in the third embodiment. FIGS. 8A and 8B show the state during assembly and have different viewing directions. FIGS. 8A and 8B show the state after assembly is completed. FIG. 10 is a cross-sectional view of the wedge structure in the third embodiment. The wedge structure 30 is formed of wedges 31 and 32, a wedge receiver 33 having an opening, and a fixing member 34.

[0078] The wedges 31 and 32 have a substantially cylindrical shape that tapers slightly. The center in the axial direction within the opening of the wedge receiver 33 also tapers corresponding to the shape of the wedges 31 and 32.

[0079] The cross-section of the wedges 31 and 32 is annular (substantially C-shaped) with a partial notch. The rod-shaped member 12 is pushed in from the side through the notch. Thereby, the wedges 31 and 32 enclose the rod-shaped member 12.

[0080] Note that the heads of the wedges 31 and 32 have a small notch at a position point-symmetrical to the large notch in the substantially C-shape. Thereby, when the rod-shaped member 12 is pushed in from the side, the width of the large notch becomes slightly wider, and the small notch absorbs the displacement.

[0081] The wedge 31 is inserted into the wedge receiver 33 from one side. The wedge 32 is inserted into the wedge receiver 33 from the other side. That is, the wedge receiver 33 receives the wedges 31 and 32 from both sides.

[0082] The fixing member 34 has a substantially U-shape. That is, it has a first holding portion that holds the head of the wedge 31, a second holding portion that holds the head of the wedge 32, and a connecting portion that connects the first holding portion and the second holding portion. The cross-section of the first holding portion and the cross-section of the second holding portion are annular (substantially C-shaped) with a partial notch. The rod-shaped member 12 is pushed in laterally through the notch.

[0083] With the rod-shaped member 12 inserted through the opening (wedge receiver) 33, the wedges 31, 32 are inserted into the wedge receiver 33, and the heads of the wedges 31, 32 are fixed by the fixing member 34 from the side, so that the rod-shaped member 12 is fixed to the wedge structure 30. Further, when the fixing member 34 presses the heads of the wedges 31, 32 and the wedges 31, 32 are inserted into the wedge receiver 33, the notches of the wedges 31, 32 are tightened, and the wedges 31, 32 securely hold the rod-shaped member 12.

[0084] Even if the wedge 31 tries to loosen and come out, this movement is transmitted to the wedge 32 via the fixing member 34, the wedge 32 resists, and an unintended release of the wedge structure 30 is suppressed. Even if the wedge 32 tries to loosen and come out, this movement is transmitted to the wedge 31 via the fixing member 34, the wedge 31 resists, and an unintended release of the wedge structure 30 is suppressed.

[0085] Since the fixing member 34 holds the wedges 31, 32 from both directions, even if the wedge receiver 33 rotates with respect to the rod-shaped member 12, it is difficult for the wedge structure 30 to be released.

[0086] ~Positioning mechanism~ FIG. 11 is an operation explanatory diagram of the positioning mechanism 250 for determining the position of the notch. The left side in the figure (FIG. 11A) is a reference example, the right side in the figure (FIG. 11B) is a preferred example, and the third embodiment preferably includes the positioning mechanism 250.

[0087] The cross-section of the wedges 31, 32 preferably has an annular (substantially C-shaped) with a partial notch 252. When the notch 252 has an appropriate dimension, it is easy to attach to the rod-shaped member 12. In the illustrated example, about 60 - 120 degrees (for example, around 90 degrees) is assumed.

[0088] On the one hand, when the size of the notch 252 increases, the play inside the wedge structure increases. The rod-shaped member 12 tries to escape towards the play. At this time, if the notch of the wedge part 31 and the notch of the wedge part 32 are arranged at positions opposite in plan view (see the reference example), there is a risk that the directionality of the rod-shaped member 12 cannot be maintained.

[0089] By arranging the notch of the wedge part 31 and the notch of the wedge part 32 at the same position in plan view, the play is offset and the directionality of the rod-shaped member 12 can be maintained.

[0090] In order to arrange the notch of the wedge part 31 and the notch of the wedge part 32 at the same position in plan view, it is preferable to have some kind of positioning means.

[0091] For example, in the illustrated example, protrusions 253 are provided along a part of the circumference on the end faces of both ends of the wedge receiver 33. The size of the protrusion 253 is set within a range that does not hinder the insertion of the wedges 31, 32. When the wedges 31, 32 are inserted into the wedge receiver 33, the protrusion 253 corresponds to the notch position 252 of the wedge part.

[0092] In this embodiment, due to the action of the fixing member 34, even without a rotation suppression mechanism, it is difficult for the wedge structure 30 to be released due to rotation. However, since the notch 252 and the protrusion 253 in the positioning mechanism 250 correspond to each other, rotation of the wedge receiver 33 with respect to the rod-shaped member 12 is suppressed via the wedges 31, 32. As a result, it becomes even more difficult for the wedge structure 30 to be released. That is, the positioning mechanism 250 also operates as a rotation suppression mechanism as a result.

[0093] ~Positioning modification example (Modification example 1)~ In the above embodiment, the positioning mechanism 250 is composed of the notch 252 and the protrusion 253. However, other aspects may be used as long as the notch of the wedge part 31 and the notch of the wedge part 32 can be arranged at the same position in plan view.

[0094] FIG. 12 is a schematic view of the wedge structure according to Modification 1-1. Marks 254 are provided on the end faces of both ends of the wedge receiver 33. The positioning mechanism 250 is composed of the notch 252 and the mark 254.

[0095] When inserting the wedges 31 and 32 into the wedge receiver 33, the notch position 252 of the wedge part is made to face the mark 254. Thereby, the notch of the wedge part 31 and the notch of the wedge part 32 are arranged at the same position in plan view.

[0096] However, in this modification, the positioning mechanism 250 does not operate as a rotation suppression mechanism (see Modification 2).

[0097] FIG. 13 is a schematic view of the wedge structure according to Modification 1-2. Small convex portions 255 are provided on the upper and outer peripheral surfaces of the wedges 31 and 32. Small concave portions 256 corresponding to the small convex portions 255 are provided on the inner walls of both ends of the wedge receiver 33. The positioning mechanism 250 is composed of the small convex portion 255 and the small concave portion 256.

[0098] When the wedges 31 and 32 are inserted into the wedge receiver 33, the small convex portion 255 and the small concave portion 256 are fitted. Thereby, the notch of the wedge part 31 and the notch of the wedge part 32 are arranged at the same position in plan view. In this modification, the positioning mechanism 250 also operates as a rotation suppression mechanism as a result.

[0099] FIG. 14 is a schematic view of the wedge structure according to Modification 1-3. Axial recesses 257 are provided on the upper and outer peripheral surfaces of the wedges 31 and 32. Protrusions 258 corresponding to the recesses 257 are provided on the inner walls of both ends of the wedge receiver 33. The positioning mechanism 250 is composed of the small convex portion 255 and the small concave portion 256.

[0100] When the wedges 31 and 32 are inserted into the wedge receiver 33, the recess 257 and the protrusion 258 are fitted. Thereby, the notch of the wedge part 31 and the notch of the wedge part 32 are arranged at the same position in plan view. In this modification, the positioning mechanism 250 also operates as a rotation suppression mechanism as a result.

[0101] ~Modification Example without Rotation Inhibiting Mechanism (Modification Example 2)~ In the above embodiment, the positioning mechanism 250 also operates as a rotation inhibiting mechanism as a result. On the other hand, in the above embodiment, since the fixing member 34 acts, even without a rotation inhibiting mechanism, it is difficult for the wedge structure 30 to be released due to rotation, so there may be cases where a rotation inhibiting mechanism is not necessary.

[0102] FIG. 15 is a schematic view of the wedge structure in Modification Example 2-1 of the third embodiment. The wedges 36 and 37 are formed in a substantially cylindrical shape that tapers slightly by opposing two halves. At this time, the wedges 36 and 37 enclose the rod-shaped member 12. The wedge 36 is inserted into the wedge receiver 33 from one side. The wedge 37 is inserted into the wedge receiver 33 from the other side. That is, the wedge receiver 33 receives the wedges 36 and 37 from both sides.

[0103] With the rod-shaped member 12 passing through the opening (wedge receiver) 33, the wedges 36 and 37 are inserted into the wedge receiver 33, and by fixing the wedges 36 and 37 with the fixing member 34 from the side, the rod-shaped member 12 is fixed to the wedge structure 30. When the fixing member 34 presses the heads of the wedges 36 and 37 and the wedges 36 and 37 are inserted into the wedge receiver 33, the wedges 36 and 37 surely hold the rod-shaped member 12.

[0104] FIG. 16 is a schematic view of the wedge structure in Modification Example 2-2 of the third embodiment. The cross-section of the wedges 38 and 39 is annular (substantially C-shaped) with a partial notch. Knobs are provided on both upper sides of the notch. The notch is opened through the knobs, and the rod-shaped member 12 is pushed in from the side through the temporarily widened notch. Due to the elastic action, the notch width becomes narrow again. Thereby, the wedges 38 and 39 enclose the rod-shaped member 12. In this state, there may be some play. The wedge 38 is inserted into the wedge receiver 33 from one side. The wedge 39 is inserted into the wedge receiver 33 from the other side. That is, the wedge receiver 33 receives the wedges 38 and 39 from both sides.

[0105] With the rod-shaped member 12 passing through the opening (wedge receiver) 33, the wedges 38, 39 are inserted into the wedge receiver 33, and by fixing the wedges 38, 39 with the fixing member 34 from the side, the rod-shaped member 12 is fixed to the wedge structure 30. When the fixing member 34 presses the heads of the wedges 38, 39 and the wedges 38, 39 are inserted into the wedge receiver 33, the notches of the wedges 38, 39 are tightened, and the wedges 38, 39 securely hold the rod-shaped member 12.

[0106] FIG. 17 is a schematic view of the wedge structure in Modification 2-3 of the third embodiment. The wedges 41, 42 form a substantially cylindrical shape that tapers slightly. The cross-section of the wedges 41, 42 is annular (substantially O-shaped).

[0107] The rod-shaped member 12 passes through the substantially O-shaped interior of the wedges 41, 42. Thereby, the wedges 41, 42 enclose the rod-shaped member 12. There may be some play between the wedges 41, 42 and the rod-shaped member 12 so that they can move easily along the rod-shaped member 12.

[0108] A plurality (for example, three) of slits 155 are provided axially on the lower side of the wedges 41, 42. Thereby, the peripheral wall between the slits functions as a leaf spring.

[0109] The wedge 41 is inserted into the wedge receiver 33 from one side. The wedge 42 is inserted into the wedge receiver 33 from the other side. That is, the wedge receiver 33 receives the wedges 41, 42 from both sides. When the wedges 41, 42 are inserted into the wedge receiver 33, the leaf springs of the wedges 41, 42 are displaced to close in the radial direction, and the wedges 41, 42 securely hold the rod-shaped member 12.

[0110] With the rod-shaped member 12 passing through the opening (wedge receiver) 33, the wedges 41, 42 are inserted into the wedge receiver 33, and by fixing the wedges 41, 42 with the fixing member 34 from the side, the rod-shaped member 12 is fixed to the wedge structure 30. When the fixing member 34 presses the heads of the wedges 41, 42 and the wedges 41, 42 are inserted into the wedge receiver 33, the notches of the wedges 41, 42 are tightened, and the wedges 41, 42 securely hold the rod-shaped member 12.

[0111] ~Modifications of the fixing member (Modifications 3, 4)~ In the above-described embodiment, the fixing member 34 has a connecting portion that connects the portion that presses the head of the wedge 31 and the portion that presses the head of the wedge 32. However, by taking the reaction force with the wedge receiver 33, it is not necessary to connect them. That is, a pair of fixing members 44, 44, 45, 45, 47, 47 are connected via the wedge receiver 33. Thereby, it functions in the same manner as the connecting portion of the fixing member 34. The operation of one pressing portion is transmitted to the other pressing portion via the wedge receiver 33.

[0112] FIG. 18 is a schematic view of the wedge structure in Modification 3-1 of the third embodiment. A pair of fixing members 44, 44 are provided on both end face portions of the wedge receiver 33. The fixing member 44 is rotatable about an axis erected from the end portion of the wedge receiver 33.

[0113] In the illustrated example, the wedges 31, 32 are provided with positioning marks indicating the positions corresponding to the rotation axes.

[0114] With the rod-shaped member 12 inserted through the opening (wedge receiver) 33 and the wedges 31, 32 inserted into the wedge receiver 33, the fixing member 44 is rotated, and the fixing members 44, 44 and the wedges 31, 32 are engaged, whereby the rod-shaped member 12 is fixed to the wedge structure 30. When the pair of fixing members 44, 44 press the heads of the wedges 31, 32 and the wedges 31, 32 are inserted into the wedge receiver 33, the wedges 31, 32 surely hold the rod-shaped member 12.

[0115] FIG. 19 is a schematic view of the wedge structure in Modification 3-2 of the third embodiment. A pair of fixing members 45, 45 are provided at a portion extending from the wedge receiver 33. The fixing member 45 is composed of a pressing portion, a rotation axis, and an axis stop. A bearing is provided at the portion extending from the wedge receiver 33.

[0116] With the rod-shaped member 12 passing through the opening (wedge receiver) 33 and the wedges 31, 32 inserted into the wedge receiver 33, a pair of fixing members 45, 45 are inserted through the rod-shaped member 12. By engaging the fixing members 45, 45 with the wedges 31, 32 and disposing the rotation shaft in the bearing, the rod-shaped member 12 is fixed to the wedge structure 30. An axial stop is provided at the end of the rotation shaft, and the axial stop is locked to the bearing. When the fixing members 45, 45 press the heads of the wedges 31, 32 and the wedges 31, 32 are inserted into the wedge receiver 33, the wedges 31, 32 securely hold the rod-shaped member 12.

[0117] Figure 20 is a schematic view of the wedge structure in Modification 3-3 of the third embodiment. A pair of fixing members 47, 47 are provided on the end faces of both ends of the wedge receiver 33. The fixing member 47 is composed of a pressing portion and a fitting rod. A plurality (three in the illustrated example) of fitting rods stand upright from one surface of the pressing portion. A plurality (three in the illustrated example) of fitting holes are provided on the end faces of both ends of the wedge receiver 33. By fitting the fitting rods of the fixing member 47 into the fitting holes of the wedge receiver 33, the fixing member 47 can receive a reaction force from the wedge receiver 33.

[0118] With the rod-shaped member 12 passing through the opening (wedge receiver) 33 and the wedges 31, 32 inserted into the wedge receiver 33, a pair of fixing members 47, 47 are inserted through the rod-shaped member 12. While fixing the fixing members 47 and the wedge receiver 33, by engaging the fixing members 47, 47 with the wedges 31, 32, the rod-shaped member 12 is fixed to the wedge structure 30. When the fixing members 47, 47 press the heads of the wedges 31, 32 and the wedges 31, 32 are inserted into the wedge receiver 33, the wedges 31, 32 securely hold the rod-shaped member 12.

[0119] Figure 21 is a schematic view of the wedge structure in Modification 4 of the third embodiment. A plan view of the positioning mechanism 250 is added. If the notch 252 and the protrusion 253 in the positioning mechanism 250 correspond and as a result, it also operates as a rotation suppression mechanism, there may be a case where the fixing member 34 can be omitted because the unintentional release of the wedge structure 30 is suppressed.

[0120] As a result, the wedge receiver 33 is prevented from rotating relative to the rod-shaped member 12 via the wedges 31 and 32, and an unintentional release of the wedge structure 30 is suppressed.

[0121] Originally, even if an external force acts on the wedge receiver 33 in the direction of the wedge 32, the wedge 32 resists, so an unintentional release of the wedge structure 30 due to loosening of the wedge 31 is suppressed. Conversely, even if an external force acts on the wedge receiver 33 in the direction of the wedge 31, the wedge 31 resists, so an unintentional release of the wedge structure 30 due to loosening of the wedge 32 is suppressed. That is, by the wedge receiver 33 receiving the wedges 31 and 32 from both sides, an unintentional release of the wedge structure 30 is suppressed.

[0122] ~Application Example to Retainer~ FIG. 22 is a conceptual diagram for comparing the outlines of the prior art and the technology of the present application. The retainer 3 supports the bag-shaped filter cloth 2. One end of the filter cloth 2 is closed and the other end is open. The material of the filter cloth is not limited, but polypropylene, polyester, polyamide, vinylon, cotton, etc. are generally used.

[0123] A plurality of filter cloths 2 supported by the retainer 3 are arranged with their longitudinal directions vertical. An opening is provided in the top plate of the device, and the filter cloth 2 is inserted and suspended and supported by the top plate. Thereby, the bag filter type dust collector 1 is formed.

[0124] The prior art retainer is formed in a cylindrical and cage shape from a plurality of vertical wire rods arranged in the circumferential direction and a plurality of ring members arranged in the vertical direction and connecting the plurality of vertical wire rods by welding.

[0125] The usage scenarios of the retainer include when assembling the retainer, during normal operation, during pulse jet, when replacing the filter cloth, and when discarding the retainer. However, due to the connection by welding, there are problems in each scenario.

[0126] FIG. 23 is an overall configuration diagram of the retainer of the technology of the present application. The retainer 3 of the technology of the present application is formed from a rod-shaped member 11 forming an inner bone, a rod-shaped member 12 forming an outer bone, and a ring member 13.

[0127] The rod-shaped member 11 is disposed axially at the center. The rod-shaped member 11 is a pipe-shaped fiber-reinforced plastic member or a metal member such as aluminum. It may also be made of resin.

[0128] A plurality (four in the illustrated example) of rod-shaped members 12 are arranged circumferentially around the rod-shaped member 11. The rod-shaped member 12 is a metal wire coated with resin. As the coating resin, polyethylene, vinyl chloride, polyester, etc. are generally used.

[0129] The ring member 13 is provided with a wedge receiver 23 which is an opening through which the rod-shaped member 11 is inserted at the center, and wedge receivers 27, 33 which are openings through which the outer wire member 12 is inserted at the circumferential portion. The center portion and the circumferential portion are connected by a connecting portion extending radially from the center.

[0130] The material of the ring member 13 is not limited, but a heat-resistant resin is preferred. It may be the same as the coating resin of the outer wire member 12. The ring members 13 are arranged at a predetermined interval in the vertical direction.

[0131] The rod-shaped member 11 and the ring member 13 are fixed by a wedge structure 21. The rod-shaped member 12 and the ring member 13 are fixed by wedge structures 25, 30.

[0132] FIG. 24 is a detailed view of an application example of the wedge structure 21 and the wedge structure 25. In the wedge structure 25, the wedge is inserted from one direction.

[0133] FIG. 25 is a detailed view of an application example of the wedge structure 21 and the wedge structure 30. In the wedge structure 30, the wedge is inserted from both directions.

[0134] In the retainer of the present technology, since welding is not used for joining, it has excellent workability, etc., and exhibits remarkable effects compared with the prior art in each scenario during retainer assembly, normal operation, pulse jet, filter cloth replacement, and retainer disposal.

[0135] The above described the formation of a retainer as an application example of the wedge structure of the present application, but it is not limited thereto. The wedge structure of the present application is widely applicable particularly to the coupling with a rod-shaped member made of a resin-based material. Of course, it may also be applied to the coupling with a rod-shaped member other than resin-based. Examples of rod-shaped members other than resin-based include stainless steel rods, aluminum rods, titanium rods, etc.

Explanation of Signs

[0136] 1 Bag filter type dust collector 2 Filter cloth 3 Retainer 11 Inner frame member 12 Outer frame member 13 Ring member 21 Wedge structure (First Embodiment) 22 Wedge 23 Wedge receiver 25 Wedge structure (Second Embodiment) 26 Wedge 27 Wedge receiver 28,29 Wedge 30 Wedge structure (Third Embodiment) 31,32 Wedge 33 Wedge receiver 34 Fixing member 36,37,38,39,41,42 Wedge 44,45,47 Fixing member 50 Rotation suppression mechanism 52 Protrusion 53 Recess 54 Projection 55 Hole 56 Notch 57 Claw 58 End face projection 61 Gap 62 Extension 150 Rotation suppression mechanism 152 Protrusion 153 Recess 155 Slit 156 Projection 250 Positioning mechanism 252 Notch 253 Projection 254 Mark 255 Convex part 256 Concave part 257 Concave part 258 Convex part

Claims

1. A wedge structure coupled to a rod-shaped member, comprising a wedge receiver having a hole through which the rod-shaped member can be inserted, a wedge portion inserted into the wedge receiver while enclosing the rod-shaped member, and a rotation suppression mechanism for suppressing rotation of the wedge receiver with respect to the rod-shaped member ; the rotation suppression mechanism comprises a convex portion or concave portion on the outer periphery of the wedge portion and a concave portion or convex portion on the inner periphery of the wedge receiver corresponding to the convex portion or concave portion on the wedge portion side, ; the convex portion on the wedge portion side functions as a leaf spring by being partially separated from the wedge portion body through a notch, or the convex portion on the wedge receiver side functions as a leaf spring by being partially separated from the wedge receiver body through a notch, a claw portion is provided at the tip of the leaf spring formed by the convex portion on the wedge portion side, and the claw portion is locked to the end face of the wedge receiver, or a claw portion is provided at the tip of the leaf spring formed by the convex portion on the wedge receiver side, and the claw portion is locked to the end face of the wedge portion characterizing the wedge structure.

2. The rotation suppression mechanism comprises a protrusion or hole on the inner periphery of the wedge portion and a hole or protrusion on the outer periphery of the rod-shaped member corresponding to the protrusion or hole on the wedge portion side, characterizing the wedge structure according to Claim 1.

3. An extension portion is provided at the tip of the leaf spring formed by the convex portion on the wedge portion side, the extension portion has flexibility and can be folded back and inserted into the gap formed between the wedge portion and the rod-shaped member characterizing the wedge structure according to Claim 1.

4. The wedge portion is formed by two halves facing each other, a protrusion is provided at the center of the end face of either of the two halves, and the end faces of the two halves face each other through the protrusion characterizing the wedge structure according to Claim 1 or Claim 3.

5. The rod-shaped member is resin-coated or is a resin-based material containing fiber-reinforced plastic characterizing the wedge structure according to any one of Claims 1 to 4.

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