Wedge structure

Abstract

To provide a wedge structure capable of being widely applied to uniting with a rod-shaped member.SOLUTION: A wedge structure 30 is united to a rod-shaped member 12. The wedge structure 30 is equipped with a wedge receiving portion 33 that has a hole in which the rod-shaped member 12 can be inserted, a wedge 31 that is inserted in the wedge receiving portion 33 from one side while containing the rod-shaped member 12, a wedge portion 32 that is inserted in the wedge receiving portion 33 from the other side while containing the rod-shaped member 12, and a fixing member 34 that holds down a head portion of the wedge 31 and holds down a head portion of the wedge 32. The fixing member 34 has a coupling portion that couples a part holding down the head portion of the wedge 31 and a part holding down the head portion of the wedge 32.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. Thereby, clogging is prevented.

[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, the replacement frequency increases, resulting in a large life cycle cost burden.

[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 a welded wire is large.

[0009] The present invention solves the above problems and aims 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 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 receiver having a hole through which the rod-shaped member can be inserted, a first wedge portion inserted into the wedge receiver from one side while enclosing the rod-shaped member, and a second wedge portion inserted into the wedge receiver from the other side while enclosing the rod-shaped member.

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

[0012] Furthermore, when the wedge receiver operates so that the first wedge portion comes off, the second wedge portion counteracts. When the wedge receiver operates so that the second wedge portion comes off, the first wedge portion counteracts. As a result, an unintended release of the wedge structure is suppressed.

[0013] In the above 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.

[0014] The fixing member suppresses the first wedge portion and the second wedge portion from coming off. As a result, an unintended release of the wedge structure is suppressed.

[0015] In the above invention, preferably, the fixing member further includes a first restraining portion that restrains the head of the first wedge portion, a second restraining portion that restrains the head of the second wedge portion, and a connecting portion that connects the first restraining portion and the second restraining portion.

[0016] The connecting portion transmits the operation of the first wedge portion coming off, the second wedge portion functions, the operation of the second wedge portion coming off is transmitted, and the first wedge portion functions.

[0017] In the above invention, preferably, the cross-sections of the first wedge portion and the second wedge portion are annular (substantially C-shaped) with a partial notch, and the notch of the first wedge portion and the notch of the second wedge portion are arranged at corresponding positions.

[0018] 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.

[0019] By arranging the notch of the first wedge portion and the notch of the second wedge portion at corresponding positions, the directionality of the rod-shaped member can be maintained.

[0020] In the above invention, preferably, the wedge receiving portion has positioning means for determining the notch position of the first wedge portion and the notch position of the second wedge portion.

[0021] Thereby, the notch of the first wedge portion and the notch of the second wedge portion can be arranged at corresponding positions.

[0022] In the above invention, preferably, the positioning means is a protrusion provided at the end of the wedge receiving portion, the protrusion corresponds to the notch position of the first wedge portion and the notch position of the second wedge portion, and the wedge receiving portion is suppressed from rotating with respect to the rod member.

[0023] Positioning can be achieved by the correspondence between the protrusion and the notch. The correspondence between the protrusion and the notch functions as a rotation suppression mechanism as a result.

[0024] In the above invention, preferably, the rod-shaped member is resin-coated or is a resin-based material including fiber-reinforced plastic.

[0025] Due to being different from conventional coupling structures such as welding in the present application, it can 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.

[0026] The invention of the present application for solving the above problems is a wedge structure coupled to a rod-shaped member. It includes 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 that suppresses rotation of the wedge receiver with respect to the rod member.

[0027] Thereby, it can be simply and surely coupled to the rod-shaped member. For example, it is superior in workability compared to conventional coupling structures such as welding, and disassembly, etc. is also easy.

[0028] Furthermore, even when rotation around the rod-shaped member occurs in the wedge structure, the rotation suppression mechanism functions to suppress the rotation. And it suppresses the unintentional release of the wedge structure.

[0029] In the above invention, preferably, the rotation suppression mechanism is composed of 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 receiver side provided on the inner periphery of the wedge receiver corresponding to the convex portion or concave portion on the wedge portion side.

[0030] Thereby, the rotation suppression mechanism functions.

[0031] In the above invention, preferably, the rotation suppression mechanism is composed of a protrusion or hole on the wedge portion side provided on the inner periphery of the wedge portion and a hole or protrusion on the rod-shaped member side provided on the outer periphery of the rod-shaped member corresponding to the protrusion or hole on the wedge portion side.

[0032] As a result, the rotation suppression mechanism functions.

[0033] 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.

[0034] When the leaf spring functions, the function of the rotation suppression mechanism is improved.

[0035] 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.

[0036] When the claw is locked to the end face of the wedge portion, an unintended release of the wedge structure is suppressed.

[0037] 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-shaped member.

[0038] When the extension portion is inserted into the gap, the generation of play in the gap is suppressed, and the wedge portion surely holds the rod-shaped member.

[0039] 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.

[0040] As a result, the two halves operate like a balance with the protrusion as a fulcrum. As a result, it becomes easy to insert and surely holds the rod-shaped member.

[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 connection structures such as welding, it can also be connected to rod-shaped members such as resin-based ones. However, the rod-shaped member is not limited to resin-based ones.

Advantages of the Invention

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

Brief Description of the Drawings

[0044]

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Mode for Carrying Out the Invention

[0045] ~Basic configuration of the first embodiment of the wedge structure~ Figs. 1 and 2 are schematic views of the wedge structure in the first embodiment. Figs. 1A and B show the state during assembly and have different viewing directions. Fig. 2 shows the state after assembly is completed. Fig. 3 is a cross-sectional view of the wedge structure in the first embodiment. The wedge structure 30 is formed of wedges 31 and 32, a wedge receiver 33 having an opening, and a fixing member 34.

[0046] 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.

[0047] The cross-section of the wedges 31 and 32 is an annular shape (substantially C-shaped) having a partial notch. The rod-shaped member 12 is pushed in laterally through the notch. Thereby, the wedges 31 and 32 enclose the rod-shaped member 12.

[0048] Note that the heads of the wedges 31 and 32 have small notches at positions symmetric to a large notch in a substantially C shape. Thus, 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.

[0049] 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.

[0050] 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 sections of the first holding portion and the second holding portion are annular (substantially C shape) with partial notches. The rod-shaped member 12 is pushed in from the side through the notches.

[0051] With the rod-shaped member 12 inserted through the opening (wedge receiver) 33, the wedges 31 and 32 are inserted into the wedge receiver 33, and the heads of the wedges 31 and 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 and 32 and the wedges 31 and 32 are inserted into the wedge receiver 33, the notches of the wedges 31 and 32 are tightened, and the wedges 31 and 32 securely hold the rod-shaped member 12.

[0052] Even if the wedge 31 tries to loosen and come out, the movement is transmitted to the wedge 32 through 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, the movement is transmitted to the wedge 31 through the fixing member 34, the wedge 31 resists, and an unintended release of the wedge structure 30 is suppressed.

[0053] Since the fixing member 34 holds the wedges 31 and 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.

[0054] ~Positioning mechanism~ FIG. 4 is an operation explanatory diagram of the positioning mechanism 250 for determining the position of the notch. The left side in the figure (FIG. 4A) is a reference example, and the right side in the figure (FIG. 4B) is a preferred example. It is preferable that the first embodiment includes the positioning mechanism 250.

[0055] It is preferable that the cross sections of the wedges 31 and 32 are annular (substantially C-shaped) with a partial notch 252. When the notch 252 has appropriate dimensions, it is easy to attach to the rod-shaped member 12. In the illustrated example, about 60 to 120 degrees (for example, around 90 degrees) is assumed.

[0056] On the other hand, when the dimension of the notch 252 increases, the play inside the wedge structure increases. The rod-shaped member 12 tries to escape in the direction of the play. At this time, if the notch of the wedge portion 31 and the notch of the wedge portion 32 are arranged at positions opposite to each other in plan view (see the reference example), there is a possibility that the directionality of the rod-shaped member 12 cannot be maintained.

[0057] By arranging the notch of the wedge portion 31 and the notch of the wedge portion 32 at the same position in plan view, the play is offset and the directionality of the rod-shaped member 12 can be maintained.

[0058] In order to arrange the notch of the wedge portion 31 and the notch of the wedge portion 32 at the same position in plan view, it is preferable to have some kind of positioning means.

[0059] 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 dimensions of the protrusions 253 are set within a range that does not inhibit the insertion of the wedges 31 and 32. When the wedges 31 and 32 are inserted into the wedge receiver 33, the protrusions 253 correspond to the notch positions 252 of the wedge portions.

[0060] 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, when the notch 252 and the protrusion 253 in the positioning mechanism 250 correspond to each other, the rotation of the wedge receiver 33 with respect to the rod-shaped member 12 is suppressed via the wedges 31 and 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 (see the second and third embodiments) as a result.

[0061] ~Positioning Variation (Variation 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 notches of the wedge 31 and the notches of the wedge 32 can be arranged at the same position in a plan view.

[0062] FIG. 5 is a schematic view of the wedge structure according to Variation 1-1. Marks 254 are attached to both end faces of the wedge receiver 33. The positioning mechanism 250 is composed of the notch 252 and the mark 254.

[0063] 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. As a result, the notches of the wedge 31 and the notches of the wedge 32 are arranged at the same position in a plan view.

[0064] However, in this variation, the positioning mechanism 250 does not operate as a rotation suppression mechanism (see Variation 2).

[0065] FIG. 6 is a schematic view of the wedge structure according to Variation 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 portions 255 and the small concave portions 256.

[0066] 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 together. As a result, the notches of the wedge portion 31 and the notches of the wedge portion 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.

[0067] FIG. 7 is a schematic view of the wedge structure according to Modifications 1-3. Concave portions 257 are provided in the axial direction on the upper and outer peripheral surfaces of the wedges 31 and 32. Convex portions 258 corresponding to the concave portions 257 are provided on the inner walls of both ends of the wedge receiver 33. The positioning mechanism 250 is composed of a small convex portion 255 and a small concave portion 256.

[0068] When the wedges 31 and 32 are inserted into the wedge receiver 33, the concave portion 257 and the convex portion 258 are fitted together. As a result, the notches of the wedge portion 31 and the notches of the wedge portion 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.

[0069] ~Modification without rotation suppression mechanism (Modification 2)~ In the above embodiment, the positioning mechanism 250 also operates as a rotation suppression mechanism as a result. On the other hand, in the above 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, so there may be cases where a rotation suppression mechanism is not necessary.

[0070] FIG. 8 is a schematic view of the wedge structure in Modification 2-1 of the first embodiment. The wedges 36 and 37 are formed in a substantially cylindrical shape that tapers slightly by facing 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.

[0071] With the rod-shaped member 12 inserted through the opening (wedge receiver) 33, the wedges 36, 37 are inserted into the wedge receiver 33, and the wedges 36, 37 are fixed by the fixing member 34 from the side, whereby the rod-shaped member 12 is fixed to the wedge structure 30. When the fixing member 34 presses the heads of the wedges 36, 37 and the wedges 36, 37 are inserted into the wedge receiver 33, the wedges 36, 37 securely hold the rod-shaped member 12.

[0072] Figure 9 is a schematic view of the wedge structure in Modification 2-2 of the first embodiment. The cross-sections of the wedges 38, 39 are annular (substantially C-shaped) with partial cutouts. Grips are provided on both upper sides of the cutouts. The cutout is opened through the grip, and the rod-shaped member 12 is pushed in from the side through the temporarily widened cutout. Due to the elastic action, the cutout width becomes narrow again. Thereby, the wedges 38, 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, 39 from both sides.

[0073] With the rod-shaped member 12 inserted through the opening (wedge receiver) 33, the wedges 38, 39 are inserted into the wedge receiver 33, and the wedges 38, 39 are fixed by the fixing member 34 from the side, whereby 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 cutouts of the wedges 38, 39 are tightened, and the wedges 38, 39 securely hold the rod-shaped member 12.

[0074] Figure 10 is a schematic view of the wedge structure in Modification 2-3 of the first embodiment. The wedges 41, 42 form a substantially cylindrical shape that tapers slightly. The cross-sections of the wedges 41, 42 are annular (substantially O-shaped).

[0075] The rod-shaped member 12 is inserted 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 it can move easily along the rod-shaped member 12.

[0076] On the lower sides of the wedges 41 and 42, a plurality (for example, three) of slits 155 are provided axially. As a result, the peripheral wall between the slits functions as a leaf spring.

[0077] 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 and 42 from both sides. When the wedges 41 and 42 are inserted into the wedge receiver 33, the leaf springs of the wedges 41 and 42 are displaced so as to close in the radial direction, and the wedges 41 and 42 securely hold the rod-shaped member 12.

[0078] With the rod-shaped member 12 inserted through the opening (wedge receiver) 33, the wedges 41 and 42 are inserted into the wedge receiver 33, and the wedges 41 and 42 are fixed by the fixing member 34 from the side, whereby the rod-shaped member 12 is fixed to the wedge structure 30. When the fixing member 34 presses the heads of the wedges 41 and 42 and the wedges 41 and 42 are inserted into the wedge receiver 33, the notches of the wedges 41 and 42 are tightened, and the wedges 41 and 42 securely hold the rod-shaped member 12.

[0079] ~Modification examples of the fixing member (Modification examples 3 and 4)~ The fixing member 34 in the above embodiment has a connecting portion that connects the portion that suppresses the head of the wedge 31 and the portion that suppresses the head of the wedge 32. However, by taking the reaction force at 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. As a result, it functions in the same way as the connecting portion of the fixing member 34. The operation of one suppressing portion is transmitted to the other suppressing portion via the wedge receiver 33.

[0080] FIG. 11 is a schematic view of the wedge structure in Modification example 3-1 of the first embodiment. A pair of fixing members 44, 44 are provided on the end faces at both ends of the wedge receiver 33. The fixing member 44 is rotatable about an axis erected from the end of the wedge receiver 33.

[0081] In the illustrated example, the wedges 31 and 32 are provided with positioning marks indicating the positions corresponding to the rotation axes.

[0082] With the rod-shaped member 12 passing 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 securely hold the rod-shaped member 12.

[0083] FIG. 12 is a schematic view of the wedge structure in Modification 3-2 of the first 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 shaft, and a shaft stopper. A bearing is provided at the portion extending from the wedge receiver 33.

[0084] With the rod-shaped member 12 passing through the opening (wedge receiver) 33 and the wedges 31, 32 inserted into the wedge receiver 33, the pair of fixing members 45, 45 are inserted through the rod-shaped member 12, the fixing members 45, 45 and the wedges 31, 32 are engaged, and the rotation shaft is disposed in the bearing, whereby the rod-shaped member 12 is fixed to the wedge structure 30. A shaft stopper is provided at the end of the rotation shaft, and the shaft stopper 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.

[0085] FIG. 13 is a schematic view of the wedge structure in Modification 3-3 of the first 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.

[0086] 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 member 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 surely hold the rod-shaped member 12.

[0087] FIG. 14 is a schematic view of the wedge structure in Modification 4 of the first embodiment. A plan view of the positioning mechanism 250 is appended. 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, the unintentional release of the wedge structure 30 is suppressed, so there may be a case where the fixing member 34 can be omitted.

[0088] Thereby, the rotation of the wedge receiver 33 with respect to the rod-shaped member 12 via the wedges 31, 32 is suppressed. And the unintentional release of the wedge structure 30 is suppressed.

[0089] Originally, even if an external force acts on the wedge receiver 33 in the direction of the wedge 32, since the wedge 32 resists, the unintentional release of the wedge structure 30 due to the 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, since the wedge 31 resists, the unintentional release of the wedge structure 30 due to the loosening of the wedge 32 is suppressed. That is, by the wedge receiver 33 receiving the wedges 31, 32 from both sides, the unintentional release of the wedge structure 30 is suppressed.

[0090] ~Basic Configuration of the Second Embodiment of the Wedge Structure~ FIG. 15 is a schematic view 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.

[0091] The wedge 22 is formed in a substantially cylindrical shape that tapers slightly by opposing two half bodies. Note that unevenness is provided on the end faces of the half bodies, and the unevenness meshes when the half bodies 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.

[0092] 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 rotation occurring around the rod-shaped member 11.

[0093] 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 periphery of the wedge 22 and a concave portion 53 provided on the inner periphery of the wedge receiver 23. By the convex portion 52 and the concave portion 53 corresponding to each other, rotation of the wedge receiver 23 with respect to the rod-shaped member 11 is suppressed via the wedge 22.

[0094] The uneven relationship between the convex portion 52 and the concave portion 53 may be reversed. In the illustration, two uneven portions 52 and 53 are provided at opposing positions on the circumference, respectively. However, if there is one or more uneven relationships, it functions as the rotation suppression mechanism 50.

[0095] FIG. 16 is a detailed view of a half body of the wedge 22. The rotation suppression mechanism 50 further includes a protrusion 54 provided on the inner periphery of the wedge 22 and a hole 55 (not shown) provided on the outer periphery of the rod-shaped member 11. By the protrusion 54 corresponding 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.

[0096] The convex portion 52 is formed such that the axial direction of the cylinder 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.

[0097] The recess 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 recess 53.

[0098] A claw 57 is provided at the tip of the leaf spring 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 which is the wedge receiver 23. Thereby, it can be confirmed that the wedge 22 has been inserted into the wedge receiver 23 up to a predetermined position.

[0099] Thereby, the wedge 22 is securely inserted into the wedge receiver 23. As a result, the wedge structure 21 is securely 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. And the unintentional release of the wedge structure 21 is suppressed.

[0100] ~Additional operation of the second embodiment of the wedge structure~ FIG. 17 is an explanatory diagram of the additional operation according to the second 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. 16). As a result, the end faces of the two halves face each other via the protrusion 58. The two halves operate like a balance with the protrusion 58 as a fulcrum.

[0101] 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). Thereby, the insertion becomes easy.

[0102] When the wedge 22 is securely inserted to a predetermined position in the wedge receiver 23, the leaf spring 52 acts so as to open outward. The ends of the two halves close (the tips open). Thereby, the wedge 22 securely 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 securely coupled to the rod-shaped member 11.

[0103] ~Second Embodiment Variation of Wedge Structure~ FIG. 18 is a perspective view (left) and a cross-sectional view (right) of a wedge structure according to the variation. The operation of the variation will be described based on FIG. 18.

[0104] When the wedge 22 is securely inserted to a predetermined position of the wedge receiver 23, the leaf spring 52 acts to open outward. As a result, at the tips of the two halves, a minute gap 61 is generated between the wedge 22 and the rod-shaped member 11. Even if the wedge 22 holds the rod-shaped member 11 at the ends of the two halves, play may occur in the gap 61, and there is a risk that the holding force will become insufficient.

[0105] In the variation, an extension 62 is provided at the tip of the long leaf spring 52. The extension 62 has flexibility. The extension 62 is folded back inward, and the folded tip can be inserted into the gap 61.

[0106] This suppresses the occurrence of play in the gap 61, and the wedge 22 securely holds the rod-shaped member 11.

[0107] ~Third Embodiment and Variation of Wedge Structure~ FIG. 19 is a schematic view of a wedge structure according to the third embodiment. The wedge structure 25 is formed from a wedge 26 and a wedge receiver 27 having an opening. The wedge 26 is inserted into the wedge receiver 27.

[0108] The wedge 26 is formed in a substantially cylindrical shape that tapers slightly by opposing two halves. At this time, the wedge 26 encloses the rod-shaped member 12. At the opening of the wedge receiver 27, the rod-shaped member 12 can be inserted.

[0109] On the other hand, the wedge structure 25 has a rotation suppression mechanism 150. The rotation suppression mechanism 150 consists of a convex portion 152 provided on the outer circumference of the wedge 25 and a concave portion 153 provided on the inner circumference of the wedge receiver 27. By the convex portion 152 and the concave portion 153 corresponding to each other, 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.

[0110] FIG. 20 is a schematic view of a wedge structure according to a modification of the third embodiment.

[0111] The wedge 26 of the third embodiment is formed in a substantially cylindrical shape by opposing two halves, whereas the wedge 28 of the modification is an integral body.

[0112] The cross section of the wedge 28 is an annular shape (substantially C-shaped) with a partial notch. Grips are provided on both upper sides of the notch.

[0113] 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 becomes narrow again. Thereby, 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 that of the third embodiment.

[0114] 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.

[0115] 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, rotation of the wedge receiver 27 with respect to the rod-shaped member 12 is suppressed via the wedge 28. And an unintentional release of the wedge structure 25 is suppressed.

[0116] FIG. 21 is a schematic view of a wedge structure according to another modification of the third embodiment.

[0117] The wedge 29 of another modification forms a substantially cylindrical shape that tapers slightly as an integral body. The cross section of the wedge 29 is an annular shape (substantially O-shaped).

[0118] The rod-shaped member 12 is inserted through the substantially O-shaped interior of the wedge 29. Thereby, 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.

[0119] On the lower side of the wedge 29, a plurality (for example, three) of slits 155 are provided in the axial direction. As a result, the peripheral wall between the slits functions as a leaf spring.

[0120] When the wedge 29 is inserted into the wedge receiver 27, the leaf spring of the wedge 29 is displaced so as to close in the radial direction, and the wedge 29 securely holds the rod-shaped member 12.

[0121] The wedge structure in the modification also has a rotation suppression mechanism 150. On the inner wall of the wedge receiver 27, a plurality (for example, three) of protrusions 156 are provided so as to correspond to the slits 155. The rotation suppression mechanism 150 is composed of the slits 155 and the protrusions 156, and the protrusions 156 and the slits 155 are fitted together. As a result, the rotation of the wedge receiver 27 with respect to the rod-shaped member 12 is suppressed via the wedge 29. Then, the unintentional release of the wedge structure 25 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 rods that connect the plurality of vertical wire rods by welding and are arranged in the vertical direction.

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

[0126] Figure 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 by 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 arranged 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 bone wire 12 is inserted at the peripheral portion. The center portion and the peripheral 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 preferable. It may be the same as the coating resin of the outer bone wire 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] Figure 24 is a detailed diagram 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.

[0133] Figure 25 is a detailed diagram 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.

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

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

Explanation of reference numerals

[0136] 1 Bag filter type dust collector 2 Filter cloth 3 Retainer 11 Inner bone wire member 12 Outer bone wire member 13 Ring member 21 Wedge structure (Second embodiment) 22 Wedge 23 Wedge receiver 25 Wedge structure (Third embodiment) 26 Wedge 27 Wedge receiver 28, 29 Wedge 30 Wedge structure (First 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 Concave portion 155 Slit 156 Protrusion 250 Positioning mechanism 252 Notch 253 Protrusion 254 Mark 255 Convex portion 256 Concave portion 257 Concave portion 258 Convex portion

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 first wedge portion inserted into the wedge receiver from one side while enclosing the rod-shaped member; a second wedge portion inserted into the wedge receiver from the other side while enclosing the rod-shaped member; The wedge structure is characterized by comprising the above.

2. The wedge structure according to claim 1, further comprising a fixing member for suppressing the head of the first wedge portion and the head of the second wedge portion.

3. The wedge structure according to claim 1, further comprising a fixing member having a first suppressing portion for suppressing the head of the first wedge portion, a second suppressing portion for suppressing the head of the second wedge portion, and a connecting portion connecting the first suppressing portion and the second suppressing portion.

4. The cross sections of the first wedge portion and the second wedge portion are annular (substantially C-shaped) with partial cutouts, and the cutouts of the first wedge portion and the cutouts of the second wedge portion are arranged at positions where the cutout directions correspond to each other. The wedge structure according to any one of claims 1 to 3, characterized by the above.

5. The wedge receiver has a positioning means for determining the cutout positions of the first wedge portion and the cutout positions of the second wedge portion. The wedge structure according to claim 4, characterized by the above.

6. The positioning means is a protrusion provided at the end of the wedge receiver, the protrusion corresponding to the cutout positions of the first wedge portion and the cutout positions of the second wedge portion, and suppressing rotation of the wedge receiver with respect to the rod-shaped member. The wedge structure according to claim 5, characterized by the above.

7. The rod-shaped member is resin-coated or is a resin-based material containing fiber-reinforced plastic. The wedge structure according to any one of claims 1 to 6, characterized by the above.

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