JP7690170B2 - wedge structure - Google Patents

Description

The present invention relates to a wedge structure that is connected to a rod-shaped member.

For example, in factories such as steelworks, bag filter type dust collectors are installed. A retainer supports a bag-shaped filter cloth, and by arranging multiple of these, a bag filter type dust collector is formed. Bag filter type dust collectors use the filter cloth to capture soot dust contained in exhaust gas from factories, etc. The gas that passes through the filter cloth is released to the outside.

Generally, exhaust gas from factories is high temperature and pressure, and a one-way flow occurs from inside the factory to the outside air. This causes soot to accumulate on the outside surface of the filter cloth, causing clogging.

At appropriate times, a pulse jet is sprayed to create a flow in the opposite direction, brushing off the soot on the outside of the filter cloth. The soot that falls is collected and discharged. This prevents clogging.

In general, a retainer is formed of multiple vertical wires arranged in the circumferential direction and multiple rings that connect the multiple vertical wires and are arranged in the vertical direction, forming a cylindrical or cage shape. The vertical wires and rings are made of metal, and are fixed to each other by welding (Patent Document 1).

JP 2001-001093 A

In addition, exhaust gas contains harmful substances that can corrode (rust) the retainer, which can cause problems when replacing the filter cloth. If the corrosion progresses further, the retainer itself must be discarded. In this case, the retainer must be disassembled separately, which is a heavy maintenance burden. Furthermore, metal retainers corrode quickly and need to be replaced more frequently, which increases the life cycle cost.

Therefore, resin coating of wires (or rod-shaped members) has been considered. However, resin-coated wires are difficult to weld. Also, disassembling welded wires requires a lot of work.

The present invention aims to solve the above problems and provide a means for easily and reliably connecting to a rod-shaped member (or wire).

The present invention, which solves the above problem, is a wedge structure that is 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 that is inserted into the wedge receiving portion from one side while containing the rod-shaped member, and a second wedge portion that is inserted into the wedge receiving portion from the other side while containing the rod-shaped member.

This allows for easy and reliable connection to the rod-shaped member. For example, it is easier to work with than conventional connection structures such as welding, and it is also easier to disassemble.

Furthermore, when the wedge receiving portion operates to allow the first wedge portion to come out, the second wedge portion opposes it. When the wedge receiving portion operates to allow the second wedge portion to come out, the first wedge portion opposes it. As a result, unintended release of the wedge structure is suppressed.

In the above invention, preferably, the device further includes a fixing member that holds down the head of the first wedge portion and the head of the second wedge portion.

The fixing member prevents the first wedge portion and the second wedge portion from coming loose. As a result, unintentional release of the wedge structure is prevented.

In the above invention, preferably, a fixing member is further provided having a first holding portion that holds the head of the first wedge portion, a second holding portion that holds the head of the second wedge portion, and a connecting portion that connects the first holding portion and the second holding portion.

The connecting portion transmits the action of the first wedge portion to come out, causing the second wedge portion to function, and transmits the action of the second wedge portion to come out, causing the first wedge portion to function.

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

By using a wedge with a roughly C-shaped cross section, it can be pushed into the rod-shaped material from the side, making it easier to work with.

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

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

This allows the notch in the first wedge portion and the notch in the second wedge portion to be positioned in corresponding positions.

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 notch position of the first wedge portion and the notch position of the second wedge portion, and prevents the wedge receiving portion from rotating relative to the rod member.

Positioning is possible by matching the protrusions and notches. As a result, the matching of the protrusions and notches functions as a rotation suppression mechanism.

In the above invention, the rod-shaped member is preferably coated with resin or is made of a resin-based material that includes fiber-reinforced plastic.

Because the present application differs from conventional joining structures such as welding, it can also be joined to rod-shaped members such as resin-based members. However, rod-shaped members are not limited to being resin-based.

The present invention, which solves the above problem, is a wedge structure that is 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 that is inserted into the wedge receiving portion while containing the rod-shaped member, and a rotation suppression mechanism that suppresses the rotation of the wedge receiving portion relative to the rod member.

This allows for easy and reliable connection to the rod-shaped member. For example, it is easier to work with than conventional connection structures such as welding, and it is also easier to disassemble.

Furthermore, even if the wedge structure rotates around the rod-shaped member, the rotation suppression mechanism functions to suppress the rotation, thus preventing the wedge structure from being released unintentionally.

In the above invention, preferably, the rotation suppression mechanism comprises a wedge-side convex portion or a wedge-side concave portion provided on the outer periphery of the wedge portion, and a wedge-receiving portion-side concave portion or a wedge-receiving portion-side convex portion provided on the inner periphery of the wedge receiving portion in correspondence with the wedge-side convex portion or the wedge-side concave portion.

This activates the rotation suppression mechanism.

In the above invention, preferably, the rotation suppression mechanism comprises a wedge-side protrusion or a wedge-side hole provided on the inner circumference of the wedge, and a rod-shaped member side hole or a rod-shaped member side protrusion provided on the outer circumference of the rod-shaped member in correspondence with the wedge-side protrusion or the wedge-side hole.

This activates the rotation suppression mechanism.

In the above invention, preferably, the wedge-side protrusion is partially separated from the wedge-side body via a notch to function as a leaf spring, or the wedge-receiving-side protrusion is partially separated from the wedge-receiving-side body via a notch to function as a leaf spring.

The function of the leaf spring improves the function of the rotation suppression mechanism.

In the above invention, preferably, a claw portion is provided at the tip of the leaf spring formed by the wedge-side protrusion, and the claw portion is engaged with the end face of the wedge receiving portion, or a claw portion is provided at the tip of the leaf spring formed by the wedge-side protrusion, and the claw portion is engaged with the end face of the wedge portion.

The claws engage with the end face of the wedge, preventing unintentional release of the wedge structure.

In the above invention, preferably, an extension is provided at the tip of the leaf spring formed by the wedge-side protrusion, and the extension is flexible and can be folded back and inserted into the gap formed between the wedge and the rod-shaped member.

By inserting the extension into the gap, play in the gap is prevented from occurring, and the wedge portion securely holds the rod-shaped member.

In the above invention, preferably, the wedge portion is formed by two opposing halves, a protrusion is provided at the center of the end face of one of the two halves, and the end faces of the two halves face each other via the protrusion.

As a result, the two halves act like a balance with the protrusion as the fulcrum. As a result, insertion is easy and the rod-shaped member is securely held in place.

In the above invention, the rod-shaped member is preferably coated with resin or is made of a resin-based material that includes fiber-reinforced plastic.

Because the present application differs from conventional joining structures such as welding, it can also be joined to rod-shaped members such as resin-based members. However, rod-shaped members are not limited to being resin-based.

The wedge structure of the present invention can be easily and reliably connected to a rod-shaped member. For example, it is easier to work with than conventional connection structures such as welding, and it is also easier to disassemble.

Outline of wedge structure in the first embodiment Outline of wedge structure in the first embodiment Cross section of the wedge structure in the first embodiment Positioning mechanism operation Outline of wedge structure in modified example 1 of the first embodiment Outline of wedge structure in modified example 1 of the first embodiment Outline of wedge structure in modified example 1 of the first embodiment Outline of wedge structure in modified example 2 of first embodiment Outline of wedge structure in modified example 2 of first embodiment Outline of wedge structure in modified example 2 of first embodiment Outline of wedge structure in modified example 3 of first embodiment Outline of wedge structure in modified example 3 of first embodiment Outline of wedge structure in modified example 3 of first embodiment Outline of wedge structure in Modification 4 of the first embodiment Outline of wedge structure in the second embodiment Wedge half details Wedge Action Outline of wedge structure according to modified example of second embodiment Outline of wedge structure in the third embodiment Outline of wedge structure in the third embodiment modification Outline of wedge structure in the third embodiment modification Comparison between conventional retainers and the retainer of the present invention Application example of the present wedge structure to a retainer Application examples of the first and second embodiments Application examples of the third and second embodiments

- Basic configuration of the first embodiment of the wedge structure -
1 and 2 are schematic diagrams of the wedge structure in the first embodiment. 1A and 1B show the state during assembly, viewed from different 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.

The wedges 31 and 32 have a slightly tapered, roughly cylindrical shape. The opening of the wedge receiver 33 also narrows in the axial center to correspond to the shape of the wedges 31 and 32.

The cross section of the wedges 31, 32 is annular (approximately C-shaped) with a partial cutout. The rod-shaped member 12 is pushed in from the side through the cutout. As a result, the wedges 31, 32 contain the rod-shaped member 12.

The heads of the wedges 31 and 32 have a small notch at a point-symmetrical position to the large notch in the roughly C-shape. As a result, 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.

Wedge 31 is inserted into wedge receiver 33 from one side. Wedge 32 is inserted into wedge receiver 33 from the other side. In other words, wedge receiver 33 receives wedges 31 and 32 from both sides.

The fixing member 34 is roughly U-shaped. That is, it has a first holding portion that holds down the head of the wedge 31, a second holding portion that holds down 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 (roughly C-shaped) with a partial cutout. The rod-shaped member 12 is pushed in from the side through the cutout.

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 from the side by the fixing member 34, so that the rod-shaped member 12 is fixed to the wedge structure 30. Furthermore, 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.

Even if wedge 31 tries to loosen and come out, the motion is transmitted to wedge 32 via fixing member 34, and wedge 32 resists, preventing unintended release of wedge structure 30. Even if wedge 32 tries to loosen and come out, the motion is transmitted to wedge 31 via fixing member 34, and wedge 31 resists, preventing unintended release of wedge structure 30.

The fixing member 34 holds down the wedges 31, 32 from both directions, so even if the wedge receiver 33 rotates relative to the rod-shaped member 12, the wedge structure 30 is unlikely to be released.

～Positioning mechanism～
4 is an explanatory diagram of the operation of a positioning mechanism 250 that determines the position of the notch. The left side of the figure (FIG. 4A) is a reference example, and the right side of the figure (FIG. 4B) is a preferred example. It is preferable that the first embodiment is provided with the positioning mechanism 250.

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

On the other hand, if the dimensions of the notch 252 are large, the play inside the wedge structure becomes large. The rod-shaped member 12 tries to escape in the direction of the play. In this case, if the notch of the wedge portion 31 and the notch of the wedge portion 32 are positioned in opposite positions in a plan view (see reference example), the directionality of the rod-shaped member 12 may not be maintained.

By arranging the notches of wedge portion 31 and wedge portion 32 in the same position in a plan view, the escape is offset and the directionality of rod-shaped member 12 can be maintained.

It is preferable to have some sort of positioning means to position the notch in wedge portion 31 and the notch in wedge portion 32 in the same position when viewed in a plane.

For example, in the illustrated example, protrusions 253 are provided along part of the circumference of the end faces at both ends of the wedge receiver 33. The dimensions of the protrusions 253 are set within a range that does not impede 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.

In this embodiment, the action of the fixing member 34 makes it difficult for the wedge structure 30 to be released due to rotation even without a rotation suppression mechanism, but the correspondence between the notch 252 and the protrusion 253 in the positioning mechanism 250 prevents the wedge receiver 33 from rotating relative to the rod-shaped member 12 via the wedges 31 and 32. This makes it even more difficult for the wedge structure 30 to be released. In other words, the positioning mechanism 250 also functions as a rotation suppression mechanism (see the second and third embodiments).

Positioning Modification (Modification 1)
In the above embodiment, the positioning mechanism 250 is composed of the notch 252 and the protrusion 253, but other configurations are possible as long as the notch of the wedge portion 31 and the notch of the wedge portion 32 can be arranged at the same position in a plan view.

Figure 5 is a schematic diagram of the wedge structure according to variant 1-1. Marks 254 are provided on both end faces of the wedge receiver 33. The positioning mechanism 250 is composed of a notch 252 and a mark 254.

When inserting the wedges 31 and 32 into the wedge receiver 33, the notch position 252 of the wedge portion faces the mark 254. This ensures that the notch of the wedge portion 31 and the notch of the wedge portion 32 are positioned in the same position when viewed from above.

However, in this modified example, the positioning mechanism 250 does not function as a rotation suppression mechanism (see modified example 2).

Figure 6 is a schematic diagram of the wedge structure according to variant 1-2. Small convex portions 255 are provided on the upper and outer peripheral surfaces of the wedges 31 and 32. Small recesses 256 corresponding to the small convex portions 255 are provided on the inner walls at both ends of the wedge receiver 33. The positioning mechanism 250 is composed of the small convex portions 255 and the small recesses 256.

When the wedges 31 and 32 are inserted into the wedge receiver 33, the small convex portion 255 fits into the small concave portion 256. This positions the notch in the wedge portion 31 and the notch in the wedge portion 32 in the same position in a plan view. In this modified example, the positioning mechanism 250 also functions as a rotation suppression mechanism.

Figure 7 is a schematic diagram of the wedge structure according to modified example 1-3. A recess 257 is provided in the axial direction on the upper outer peripheral surface of the wedges 31 and 32. A protrusion 258 corresponding to the recess 257 is provided on the inner wall at both ends of the wedge receiver 33. The positioning mechanism 250 is composed of a small protrusion 255 and a small recess 256.

When the wedges 31 and 32 are inserted into the wedge receiver 33, the recess 257 and the protrusion 258 fit together. This positions the notch in the wedge portion 31 and the notch in the wedge portion 32 in the same position in a plan view. In this modified example, the positioning mechanism 250 also functions as a rotation suppression mechanism.

~Modification without rotation suppression mechanism (Modification 2)~
In the above embodiment, the positioning mechanism 250 also functions as a rotation suppression mechanism. On the other hand, in the above embodiment, the action of the fixing member 34 makes it difficult for the wedge structure 30 to be released due to rotation even without the rotation suppression mechanism, so that there are cases in which the rotation suppression mechanism is not necessary.

Figure 8 is a schematic diagram of the wedge structure in modified example 2-1 of the first embodiment. Wedges 36, 37 are formed into a slightly tapered, approximately cylindrical shape by opposing two halves. At this time, wedges 36, 37 contain rod-shaped member 12. Wedge 36 is inserted into wedge receiver 33 from one side. Wedge 37 is inserted into wedge receiver 33 from the other side. In other words, wedge receiver 33 receives wedges 36, 37 from both sides.

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 from the side by the fixing member 34, thereby fixing the rod-shaped member 12 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.

Figure 9 is a schematic diagram of the wedge structure in the first embodiment modification 2-2. The cross section of the wedges 38, 39 is annular (approximately C-shaped) with a partial cutout. Knobs are provided on both upper sides of the cutout. The cutout is opened via the knobs, and the rod-shaped member 12 is pushed in from the side through the cutout, which has temporarily become wider. The cutout width narrows again due to elastic action. As a result, the wedges 38, 39 contain 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. In other words, the wedge receiver 33 receives the wedges 38, 39 from both sides.

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 from the side by the fixing member 34, so that 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 in the wedges 38, 39 are tightened, and the wedges 38, 39 securely hold the rod-shaped member 12.

Figure 10 is a schematic diagram of the wedge structure in modified example 2-3 of the first embodiment. Wedges 41 and 42 form a slightly tapered, approximately cylindrical shape. The cross section of wedges 41 and 42 is annular (approximately O-shaped).

The rod-shaped member 12 is inserted through the roughly O-shaped wedges 41 and 42. As a result, the wedges 41 and 42 contain the rod-shaped member 12. There may be some play between the wedges 41 and 42 and the rod-shaped member 12 so that they can move easily along the rod-shaped member 12.

Multiple (e.g., three) slits 155 are provided in the axial direction on the underside of the wedges 41 and 42. This allows the peripheral wall between the slits to function as a leaf spring.

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. In other words, 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 so as to close in the radial direction, and the wedges 41, 42 securely hold the rod-shaped member 12.

With the rod-shaped member 12 inserted through the opening (wedge receiver) 33, the wedges 41, 42 are inserted into the wedge receiver 33, and the wedges 41, 42 are fixed from the side by the fixing member 34, so that 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.

-Modifications of fixing member (Modifications 3 and 4)-
In the above embodiment, the fixing member 34 has a connecting portion that connects the portion that holds the head of the wedge 31 and the portion that holds the head of the wedge 32, but the connecting portion may not be connected by taking up the reaction force with the wedge receiver 33. That is, the pair of fixing members 44, 44, 45, 45, 47, 47 are connected via the wedge receiver 33. This functions in the same way as the connecting portion of the fixing member 34. The operation of one holding portion is transmitted to the other holding portion via the wedge receiver 33.

Figure 11 is a schematic diagram of the wedge structure in modified example 3-1 of the first embodiment. A pair of fixing members 44, 44 are provided on both end faces of the wedge receiver 33. The fixing member 44 is rotatable about an axis erected from the end of the wedge receiver 33.

In the illustrated example, wedges 31 and 32 are provided with positioning marks that indicate the positions corresponding to the rotation axis.

When the rod-shaped member 12 is inserted through the opening (wedge receiver) 33 and the wedges 31, 32 are inserted into the wedge receiver 33, the fixing member 44 is rotated to engage the fixing members 44, 44 with the wedges 31, 32, thereby fixing the rod-shaped member 12 to the wedge structure 30. When the pair of fixing members 44, 44 push 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.

Figure 12 is a schematic diagram of the wedge structure in modified example 3-2 of the first embodiment. A pair of fixing members 45, 45 are provided at the portion extending from the wedge receiver 33. The fixing member 45 is composed of a retaining portion, a pivot shaft, and a shaft stopper. A bearing is provided at the portion extending from the wedge receiver 33.

With the rod-shaped member 12 inserted 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 into the rod-shaped member 12, the fixing members 45, 45 are engaged with the wedges 31, 32, and the rotating shaft is placed in the bearing, thereby fixing the rod-shaped member 12 to the wedge structure 30. A shaft stopper is provided at the end of the rotating shaft, and the shaft stopper is engaged with the bearing. When the fixing members 45, 45 push 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.

Figure 13 is a schematic diagram of the wedge structure in modified example 3-3 of the first embodiment. A pair of fixing members 47, 47 are provided on both end faces of the wedge receiver 33. The fixing member 47 is composed of a retaining portion and a fitting rod. Multiple fitting rods (three in the illustrated example) are erected from one surface of the retaining portion. Multiple fitting holes (three in the illustrated example) are provided on both end faces of the wedge receiver 33. The fitting rods of the fixing member 47 are fitted into the fitting holes of the wedge receiver 33, allowing the fixing member 47 to take on a reaction force from the wedge receiver 33.

With the rod-shaped member 12 inserted 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 into the rod-shaped member 12, and while fixing the fixing member 47 and the wedge receiver 33, the fixing members 47, 47 are engaged with the wedges 31, 32, thereby fixing the rod-shaped member 12 to the wedge structure 30. When the fixing members 47, 47 push 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.

Figure 14 is a schematic diagram of the wedge structure in the fourth modified example of the first embodiment. A plan view of the positioning mechanism 250 has been added. If the notch 252 and the protrusion 253 in the positioning mechanism 250 correspond to each other and, as a result, also function as a rotation suppression mechanism, the fixing member 34 may be omitted since unintended release of the wedge structure 30 is suppressed.

This prevents the wedge receiver 33 from rotating relative to the rod-shaped member 12 via the wedges 31 and 32. This also prevents the wedge structure 30 from being unintentionally released.

First of all, even if an external force acts on the wedge receiver 33 toward the wedge 32, the wedge 32 resists, and unintended release of the wedge structure 30 due to the wedge 31 loosening is suppressed. Conversely, even if an external force acts on the wedge receiver 33 toward the wedge 31, the wedge 31 resists, and unintended release of the wedge structure 30 due to the wedge 32 loosening is suppressed. In other words, the wedge receiver 33 accepts the wedges 31 and 32 from both sides, suppressing unintended release of the wedge structure 30.

- Basic configuration of the second embodiment of the wedge structure -
15 is a schematic diagram of the wedge structure according to the first embodiment. The wedge structure 21 is formed of a wedge 22 and a wedge receiver 23 having an opening. The wedge 22 is inserted into the wedge receiver 23.

The wedge 22 is formed into a slightly tapered, roughly cylindrical shape by opposing two halves. The end faces of the halves are provided with projections and recesses, which mesh when the halves are opposed. At this time, the wedge 22 contains the rod-shaped member 11. The rod-shaped member 11 can be inserted into the opening of the wedge receiver 23. The inside of the opening of the wedge receiver 23 is also tapered to correspond to the shape of the wedge 22.

However, the inventors of the present application have found that, although the wedge structure 21 functions by inserting the wedge 22 into the wedge receiver 23 and securely connects to the rod-shaped member 11, there is a risk that the wedge structure 21 may be unintentionally released due to rotation around the rod-shaped member 11.

In response to this, the wedge structure 21 has a rotation suppression mechanism 50. The rotation suppression mechanism 50 consists of a protrusion 52 provided on the outer periphery of the wedge 22 and a recess 53 provided on the inner periphery of the wedge receiver 23. The correspondence between the protrusion 52 and the recess 53 suppresses the rotation of the wedge receiver 23 relative to the rod-shaped member 11 via the wedge 22.

The relationship between the convex and concave portions 52 and 53 may be reversed. In the example shown, two convex and concave portions 52 and 53 are provided at opposing positions on the circumference, but if there is one or more convex and concave relationships, it will function as a rotation suppression mechanism 50.

Figure 16 is a detailed view of the wedge 22 half. The rotation suppression mechanism 50 further has 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. The protrusion 54 corresponds to the hole 55, thereby suppressing the rotation of the wedge 22 relative to the rod-shaped member 11. As a result, the wedge receiver 23 is suppressed from rotating relative to the rod-shaped member 11.

The protrusion 52 is formed so that the axial direction of the cylinder is the longitudinal direction, and is partially separated from the wedge 22 body via the notches 56 formed at both ends of the protrusion 52. As a result, one longitudinal end of the protrusion 52 becomes a free end, and the protrusion 52 functions as a leaf spring.

The recess 53 is formed as a continuous groove from one end of the tube to the other end. When the wedge 22 is inserted into the wedge receiver 23, the protrusion 52 is guided into the recess 53.

A claw 57 is provided at the tip of the leaf spring by the protrusion 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 to open the leaf spring 52 outward. At this time, the claw 57 is engaged with the cylindrical end surface of the wedge receiver 23. This makes it possible to confirm that the wedge 22 has been inserted into the wedge receiver 23 to the predetermined position.

This ensures that the wedge 22 is securely inserted into the wedge receiver 23. As a result, the wedge structure 21 is securely connected to the rod-shaped member 11. Even if the wedge structure 21 rotates around the rod-shaped member 11, the rotation suppression mechanism 50 functions to suppress the rotation. This also prevents the wedge structure 21 from being unintentionally released.

-Additional operation of the second embodiment of the wedge structure-
17 is an explanatory diagram of an additional operation according to the second embodiment. The wedge 22 is formed into a generally cylindrical shape with a slight taper by two halves facing each other. A protrusion 58 is provided in the center of the end face of one 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 balancers with the protrusion 58 as a fulcrum.

When the wedge 22 is inserted into the wedge receiver 23, the claw 57 is pressed from the groove 53, closing the tips of the two halves (opening the ends). This makes insertion easier.

When the wedge 22 is securely 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). This allows the wedge 22 to securely hold the rod-shaped member 11. At the same time, the wedge 22 becomes one with the wedge receiver 23. The wedge structure 21 is securely connected to the rod-shaped member 11.

~Wedge Structure Modification of Second Embodiment~
18 is a perspective view (left) and a cross-sectional view (right) of a wedge structure according to a modified example. The operation of the modified example will be described with reference to FIG.

When the wedge 22 is securely 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 tip of the two halves. Even if the wedge 22 holds the rod-shaped member 11 at the end of the two halves, play is generated in the gap 61, and there is a risk that the holding force will be insufficient.

In this modified example, an extension 62 is provided at the tip of the long leaf spring 52. The extension 62 is flexible. The extension 62 is folded back inward, so that the folded back tip can be inserted into the gap 61.

This prevents play from occurring in the gap 61 and ensures that the wedge 22 holds the rod-shaped member 11 securely.

Third embodiment of wedge structure and modified examples
19 is a schematic diagram of a wedge structure according to the third 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.

The wedge 26 is formed into a slightly tapered cylindrical shape by two halves facing each other. At this time, the wedge 26 contains the rod-shaped member 12. The rod-shaped member 12 can be inserted into the opening of the wedge receiver 27.

In response to this, the wedge structure 25 has a rotation suppression mechanism 150. The rotation suppression mechanism 150 is composed of 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. The correspondence between the convex portion 152 and the concave portion 153 suppresses the rotation of the wedge receiver 27 relative to the rod-shaped member 12 via the wedge 26. This also suppresses unintended release of the wedge structure 25.

Figure 20 is a schematic diagram of a wedge structure according to a modified example of the third embodiment.

The wedge 26 in the third embodiment is formed into a roughly cylindrical shape by two opposing halves, whereas the wedge 28 in the modified example is a single piece.

The cross section of the wedge 28 is annular (roughly C-shaped) with a partial cutout. There are knobs on both upper sides of the cutout.

The notch is opened using the knob, and the rod-shaped member 12 is pushed in from the side through the temporarily widened notch. The width of the notch narrows again due to elastic action. As a result, the wedge 28 encloses the rod-shaped member 12. In this state, some play may be allowed. The wedge receiver 27 is the same as in the third embodiment.

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

The wedge structure in the modified example also has a rotation suppression mechanism 150. The rotation suppression mechanism 150 is composed of a convex portion 152 and a concave portion 153. This prevents the wedge receiver 27 from rotating relative to the rod-shaped member 12 via the wedge 28. This also prevents the wedge structure 25 from being released unintentionally.

Figure 21 is a schematic diagram of a wedge structure according to another modified example of the third embodiment.

In another modified example, the wedge 29 is integral and forms a slightly tapered, roughly cylindrical shape. The cross section of the wedge 29 is annular (roughly O-shaped).

The rod-shaped member 12 is inserted through the roughly O-shaped interior of the wedge 29. This causes the wedge 29 to enclose 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.

Multiple (e.g., three) slits 155 are provided in the axial direction on the underside of the wedge 29. This allows the peripheral wall between the slits to function as a leaf spring.

When the wedge 29 is inserted into the wedge receiver 27, the leaf spring of the wedge 29 is displaced radially to close, and the wedge 29 securely holds the rod-shaped member 12.

The wedge structure in the modified example also has a rotation suppression mechanism 150. The inner wall of the wedge receiver 27 is provided with a plurality of (e.g., three) protrusions 156 that correspond to the slits 155. The rotation suppression mechanism 150 is composed of the slits 155 and the protrusions 156, and the protrusions 156 fit into the slits 155. This prevents the wedge receiver 27 from rotating relative to the rod-shaped member 12 via the wedge 29. This also prevents the wedge structure 25 from being unintentionally released.

~Application example to retainers~
22 is a conceptual diagram for comparing the outline of the prior art and the present invention. A retainer 3 supports a bag-shaped filter cloth 2. One end of the filter cloth 2 is closed and the other end is open. There are no limitations on the material of the filter cloth, but polypropylene, polyester, polyamide, vinylon, cotton, etc. are commonly used.

The filter cloths 2 supported by the retainer 3 are arranged vertically in a row. An opening is provided in the top plate of the device, and the filter cloths 2 are inserted and supported by being suspended from the top plate. This forms the bag filter type dust collector 1.

Conventional retainers are formed into a cylindrical or cage shape from multiple vertical wires arranged in the circumferential direction and multiple rings arranged in the vertical direction, which are connected by welding.

The retainer is used during retainer assembly, normal operation, pulse jet, filter cloth replacement, and retainer disposal, but because it is joined by welding, there are issues in each of these situations.

Figure 23 is a diagram showing the overall configuration of the retainer of the present technology. The retainer 3 of the present technology 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.

The rod-shaped member 11 is arranged in the center in the axial direction. 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.

Multiple rod-shaped members 12 (four in the illustrated example) are arranged circumferentially around rod-shaped member 11. Rod-shaped member 12 is a metal wire covered with resin. Polyethylene, vinyl chloride, polyester, etc. are commonly used as the covering resin.

The ring member 13 has a wedge receiver 23 in the center, which is an opening through which the rod-shaped member 11 is inserted, and wedge receivers 27, 33 in the periphery, which are openings through which the outer bone wire 12 is inserted. The center and periphery are connected by connecting parts that extend radially from the center.

The material of the ring members 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.

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 and 30.

Figure 24 is a detailed diagram of an application example of wedge structure 21 and wedge structure 30. In wedge structure 30, the wedges are inserted from both sides.

Figure 25 is a detailed diagram of an application example of wedge structure 21 and wedge structure 25. In wedge structure 25, the wedge is inserted from one direction.

The retainer of the present technology does not use welding for connection, making it easier to work with and providing significant advantages over conventional technologies in each of the following situations: retainer assembly, normal operation, pulse jet, filter cloth replacement, and retainer disposal.

The above describes the formation of retainers as an example of the application of the wedge structure of the present invention, but the present invention is not limited to this. The wedge structure of the present invention is widely applicable to bonding with rod-shaped members, particularly those made of resin-based materials. Of course, it may also be applied to bonding with rod-shaped members other than resin-based materials. Examples of rod-shaped members other than resin-based materials include stainless steel rods, aluminum rods, and titanium rods.

REFERENCE SIGNS LIST 1 Bag filter type dust collector 2 Filter cloth 3 Retainer 11 Inner rib wire 12 Outer rib wire 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)
Reference Signs List 31, 32 Wedge 33 Wedge receiver 34 Fixing member 36, 37, 38, 39, 41, 42 Wedge 44, 45, 47 Fixing member 50 Rotation suppressing mechanism 52 Convex portion 53 Concave portion 54 Projection 55 Hole 56 Notch 57 Claw 58 End face projection 61 Gap 62 Extension portion 150 Rotation suppressing mechanism 152 Convex portion 153 Concave portion 155 Slit 156 Projection 250 Positioning mechanism 252 Notch 253 Projection 254 Mark 255 Convex portion 256 Concave portion 257 Concave portion 258 Convex portion

Claims (7)

A wedge structure coupled to a rod-shaped member,
a wedge receiving portion having a hole through which the rod-shaped member can be inserted;
a first wedge portion that is inserted into the wedge receiving portion from one side while containing the rod-shaped member;
a second wedge portion that is inserted into the wedge receiving portion from the other side while containing the rod-shaped member;
A wedge structure comprising: The wedge structure according to claim 1 , further comprising a fixing member that holds down a head portion of the first wedge portion and also holds down a head portion of the second wedge portion. 2. The wedge structure according to claim 1, further comprising a fixing member having a first holding portion that holds a head of the first wedge portion, a second holding portion that holds a head of the second wedge portion, and a connecting portion that connects the first holding portion and the second holding portion. The first wedge portion and the second wedge portion have a cross section that is annular (approximately C-shaped) and partially cut out.
4. The wedge structure according to claim 1, wherein the notch of the first wedge portion and the notch of the second wedge portion are arranged at positions where their notch directions correspond to each other. 5. The wedge structure according to claim 4, wherein the wedge receiving portion has a positioning means for determining a position of the notch of the first wedge portion and a position of the notch of the second wedge portion. the positioning means is a protrusion provided on an end of the wedge receiving portion,
the protrusion corresponds to a notch position of the first wedge portion and a notch position of the second wedge portion,
The wedge structure according to claim 5, characterized in that the wedge receiving portion is prevented from rotating relative to the rod-shaped member . The wedge structure according to any one of claims 1 to 6, characterized in that the rod-shaped member is coated with resin or is made of a resin-based material including fiber-reinforced plastic.