Buffer device

Abstract

To provide a shock-absorbing device which can achieve a good shock absorbing function.SOLUTION: A shock-absorbing device comprises: a base part; a guide bar that is connected to the base part and extends in an axial direction; a supported body that is disposed along the guide bar and can move relative to the base part in the axial direction; a slider that is fixed to the supported body and can slide in the axial direction relative to the guide bar; and a spring member that biases against movement of the slider. The slider has a bush of which a relative angle relative to an axis can be automatically aligned with the guide bar.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure relates to a buffer device.

Background Art

[0002] Patent Document 1 discloses an operating device for a gear type transmission having a buffering function. This operating device includes a fork shaft, a locking member, a shift fork, and spring means. The fork shaft reciprocates in the axial direction. Two locking members are provided on the outer periphery of the fork shaft with a space therebetween in the axial direction. The shift fork is supported at its base portion on the fork shaft so as to be movable in the axial direction between the two locking members, and the sleeve for switching the transmission gears is axially moved by the tip portion. The spring means is provided in a pair, respectively interposed between both sides in the axial direction of the base portion of the shift fork and each locking member. That is, the fork shaft is sandwiched in the axial direction by a pair of spring means. These pair of spring means elastically position and hold the shift fork with respect to the fork shaft. Thereby, the propagation of the impact load between the shaft and the shift fork is suppressed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the device described in Patent Document 1, when the fork shaft and the shift fork are relatively inclined, the fork shaft contacts inside the hole of the shift fork, and the relative movement of the fork shaft in the axial direction becomes impossible due to strong friction. As a result, there is a problem that the buffering function of the spring means is lost.

[0005] The present disclosure has been made to solve the above problems, and an object thereof is to provide a buffer device that can exhibit a good buffering function.

Means for Solving the Problems

[0006] In order to solve the above problems, a buffer device according to the present disclosure includes a base, a guide bar connected to the base and extending in the axial direction, a supported body disposed along the guide bar and relatively movable in the axial direction with respect to the base, a slider fixed to the supported body and slidable in the axial direction with respect to the guide bar, and a spring member that biases against the movement of the slider. An alignment mechanism that is fixed to the base and disposed outside the supported body, can contact the supported body from a direction intersecting the axial direction, and is slidable relative to the supported body in the axial direction. The slider has a bush that can automatically align the relative angle with respect to the axis with respect to the guide bar. Furthermore, the buffer device according to the present disclosure includes a base, a guide bar connected to the base and extending in the axial direction, a supported body disposed along the guide bar and relatively movable in the axial direction with respect to the base, a slider fixed to the supported body and slidable in the axial direction with respect to the guide bar, a spring member that biases against the movement of the slider, and an alignment mechanism having a wheel that is fixed to the base and disposed outside the supported body, can contact the supported body from a direction intersecting the axial direction, and can roll in the axial direction in contact with the supported body. The slider has a bush that can automatically align the relative angle with respect to the axis with respect to the guide bar.

Effects of the Invention

[0007] According to the buffer device of the present disclosure, a good buffering function can be exhibited.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Mode for Carrying Out the Invention

[0009] <First Embodiment> Hereinafter, the buffer device 100 according to the first embodiment of the present disclosure will be described with reference to FIGS. 1 to 4. The buffer device 100 is used for buffering a device in which an impact load occurs during operation. In the present embodiment, the buffer device 100 is installed in a furnace 1 such as coal, oil, and waste. The container 2 of the furnace 1 is formed in, for example, a rectangular parallelepiped shape. In the container 2, deposits are likely to occur due to the deposition of soot, ash, minerals, and other combustion products and combustion by-products particles. Such particle adhesion may reduce the processing capacity of the furnace 1 and cause damage. For this reason, a combustion tube (a supported body 20 described later) is provided in the container 2 of the present embodiment. The combustion tube discharges a pressure wave into the container 2 to remove deposits in the container 2 and clean the inside of the container 2. When the combustion tube generates a pressure wave, a large impact is generated on the combustion tube due to the reaction. The buffer device 100 of the present embodiment is installed to absorb the impact generated on the combustion tube.

[0010] (Configuration of Buffer Device) As shown in FIG. 1, the buffer device 100 includes a base 3, a mounting wall portion 4, a guide bar 10, a supported body 20, a support mechanism 30, a pressing member 5, a flange 6, a slider 40, a spring member 7, and an alignment mechanism 60.

[0011] (Base) The base 3 of the present embodiment is the wall portion of the container 2 of the furnace 1 described above, and extends in the vertical direction. The base 3 is provided with an opening 3a that penetrates the base 3 in the horizontal direction. The opening 3a is formed in a circular shape.

[0012] (Mounting wall portion) The mounting wall portion 4 is disposed outside the container 2 and attached to the base 3. The mounting wall portion 4 extends in the vertical direction and is formed in an annular shape having an opening 4a that penetrates in the horizontal direction. The opening 4a is formed in a circular shape. The center of the opening 4a of the mounting wall portion 4 coincides with the center of the opening 3a of the base 3 when viewed from the direction of the axis O described later. Also, the diameter of the opening 4a of the mounting wall portion 4 is smaller than the diameter of the opening 3a of the base 3.

[0013] (Guide bar) The guide bar 10 is indirectly connected to the base 3 via the mounting wall portion 4. Also, as shown in FIG. 2, a plurality (four in the illustrated example) of guide bars 10 are provided so as to surround the opening 4a from the outer peripheral side (the radially outer side with respect to the central axis O1 described later). These plurality of guide bars 10 are arranged at equal intervals on the same circle C1. That is, the plurality of guide bars 10 are arranged at equal intervals in the circumferential direction with respect to the central axis O1.

[0014] The guide bar 10 extends in the direction of its axis O. The axis O of the guide bar 10 extends in the same direction as the central axis of the opening 3a of the base 3. Hereinafter, the axis O of the guide bar 10 may be simply referred to as the "axis O" for explanation. Also, unless otherwise specified, the radial direction with respect to the axis O of the guide bar 10 is simply referred to as the "radial direction", and the circumferential direction with respect to the axis O of the guide bar 10 is simply referred to as the "circumferential direction".

[0015] The guide bar 10 of this embodiment is formed in a shaft shape extending in the direction of the axis O. The guide bar 10 has a guide bar main body 11 and a locking member 12. The guide bar main body 11 is formed in a columnar shape extending in the direction of the axis O. A fixed end 13 is provided at the end on the base 3 side in the direction of the axis O of the guide bar main body 11. A threaded portion is formed on the outer peripheral surface of the fixed end 13. The fixed end 13 is screwed into the mounting wall portion 4 and the base 3 from the direction of the axis O. Thereby, the guide bar 10 is fixed to the base 3.

[0016] The locking members 12 are provided one on each side of the guide bar 10 in the direction of the axis O. That is, two locking members 12 are provided at intervals in the direction of the axis O. The locking member 12 on the base 3 side in the direction of the axis O is in contact with the mounting wall portion 4 from the direction of the axis O.

[0017] (Supported body) The supported body 20 is arranged along the guide bar 10. The supported body 20 is provided so as to be relatively movable in the direction of the axis O with respect to the base 3.

[0018] The supported body 20 of this embodiment is a combustion tube for pressure wave cleaning of the above-described furnace 1. The supported body 20 has a cylindrical portion 21 and an outer ring 22. The cylindrical portion 21 is formed in a cylindrical shape extending in the direction of the axis O. The supported body 20 is installed horizontally so that the central axis O1 of the cylindrical portion 21 extends in the direction of the axis O. Also, the length of the cylindrical portion 21 in the direction of the axis O is longer than the length of the guide bar 10 in the direction of the axis O. The end on the base 3 side in the direction of the axis O of the cylindrical portion 21 is inserted into the opening 4a of the mounting wall portion 4 and the opening 3a of the base 3 and is located inside the container 2. The outer ring 22 is provided so as to surround the outer peripheral surface of the cylindrical portion 21 from the outer peripheral side. The outer ring 22 is provided at a position spaced apart from the base 3 by more than the two locking members 12 in the direction of the axis O.

[0019] (Support mechanism) The support mechanism 30 has a fixture 31 and a wire 32. The fixture 31 is fixed to the upper surface of the cylindrical portion 21. A plurality (two in the illustrated example) of fixtures 31 are provided at intervals in the direction of the axis O. Note that the number of fixtures 31 can be changed as appropriate. It is not necessary to provide a plurality of fixtures 31. The two fixtures 31 are arranged at positions sandwiching the outer ring 22 of the cylindrical portion 21 from both sides in the direction of the axis O. The wire 32 extends upward from each fixture 31. The support mechanism 30 suspends and supports the supported body 20 by this wire 32.

[0020] (Restraining member) The restraining member 5 is provided at an end on the side opposite to the base portion 3 in the direction of the axis O of the guide bar 10 main body, at a position radially overlapping the outer ring 22 of the supported body 20. The restraining member 5 is a so-called shaft restraint and is provided so as to restrain the supported body 20 from the outer peripheral side. The restraining member 5 is arranged with a slight gap with respect to the outer ring 22 and is provided so as to be slidable relative to the supported body 20.

[0021] (Flange) The flange 6 is formed in an annular shape protruding from the outer peripheral surface of the cylindrical portion 21. The flange 6 is arranged at a position sandwiched from both sides in the direction of the axis O by two locking members 12 spaced apart in the direction of the axis O. Specifically, the flange 6 is provided between the fixture 31 on the base portion 3 side in the direction of the axis O and the cylindrical portion 21 of the supported body 20. A plurality (four in the illustrated example) of fitting grooves 6a are provided in the flange 6 at intervals in the circumferential direction about the central axis O1 of the cylindrical portion 21. Each fitting groove 6a opens outward in the radial direction about the central axis O1 of the cylindrical portion 21.

[0022] (Slider) The slider 40 is fixed to the supported body 20. Further, the slider 40 is provided so as to be slidable in the direction of the axis O with respect to the guide bar 10.

[0023] In this embodiment, one slider 40 is provided on each guide bar 10. That is, a total of four sliders 40 are provided. Each slider 40 is fitted into the fitting groove 6a of the flange 6. As shown in FIG. 3, the slider 40 has a bush 41 and an outer cylinder part 42.

[0024] (Bush) The bush 41 is a member having a function of being able to automatically align (automatically adjust) the relative angle θ with respect to the axis O of the guide bar 10 with respect to the guide bar 10. The bush 41 of this embodiment is a so-called spherical bush. The bush 41 has an inner member 43 and an outer member 44. The inner member 43 is an annular member and is inserted through the guide bar 10. The inner member 43 covers the guide bar 10 from the outer peripheral side. Further, the inner member 43 is slidably attached to the outer peripheral surface of the guide bar 10 in the direction of the axis O. Specifically, the inner surface 43a on the radially inner side of the inner member 43 is slidably in contact with the outer peripheral surface of the guide bar 10. Further, the inner member 43 has a spherical surface 43b formed on the outer peripheral side so as to project radially outward.

[0025] The outer member 44 is an annular member and covers the inner member 43 from the outer peripheral side. Further, the outer member 44 is slidably attached to the inner member 43 along the spherical surface 43b. Specifically, the inner surface 44a on the radially inner side of the outer member 44 is slidably in contact with the spherical surface 43b of the inner member 43. By the outer member 44 sliding with respect to the inner member 43, the relative angle θ with respect to the axis O can be automatically aligned. Further, the outer member 44 is fixed to the supported body 20 via the flange 6 and the outer cylinder part 42 described later.

[0026] The central axis O2 of the outer member 44 is along the axis O of the guide bar 10. Also, the central axis O2 of the outer member 44 extends in the same direction as the central axis O1 of the supported body 20. The outer member 44 is fixed to the supported body 20. Therefore, when the supported body 20 is inclined with respect to the axis O, the outer member 44 is inclined with respect to the axis O at the same relative angle θ as the supported body 20. That is, the relative angle θ between the central axis O2 of the outer member 44 and the axis O of the guide bar 10 coincides with the relative angle between the axis O of the guide bar 10 and the central axis O1 of the supported body 20. In the present embodiment, the relative angle θ with respect to the axis O that the slider 40 can automatically adjust means the angle between the central axis O2 of the outer member 44 of the bush 41 and the axis O of the guide bar 10.

[0027] (Outer cylinder part) The outer cylinder part 42 is a cylindrical member and covers the outer member 44 of the bush 41 from the radially outer side. An inner peripheral groove 42a is formed on the entire circumference of the inner peripheral surface of the outer cylinder part 42. The outer member 44 of the bush 41 is fitted into this inner peripheral groove 42a from the radially inner side. The bottom surface of this inner peripheral groove 42a is in contact with the outer surface 44b of the outer member 44 without a gap.

[0028] An outer peripheral groove 42b is formed on the entire circumference of the outer peripheral surface of the outer cylinder part 42. The slider 40 is fixed to the flange 6 by fitting the outer peripheral groove 42b into the fitting groove 6a of the flange 6. End surface grooves 42c are formed on both end surfaces of the outer cylinder part 42 on both sides in the direction of the axis O. The end surface grooves 42c are formed in a circular shape when viewed from the direction of the axis O.

[0029] Also, from another perspective, the outer cylinder part 42 has a main body part 45 and a mounting piece 46. The main body part 45 has a first member 45a, a second member 45b, and a third member 45c. The first member 45a is formed in an annular shape. Both end portions of the first member 45a in the direction of the axis O are located on the outer side in the direction of the axis O with respect to the flange 6 with the flange 6 as a reference. An outer peripheral groove 42b is formed on the outer peripheral surface of the first member 45a.

[0030] The second member 45b is formed in an annular shape so as to project radially inward from the inner peripheral surface of the first member 45a. The third member 45c is provided at an end portion on the side opposite to the base portion 3 in the direction of the axis O on the inner peripheral surface of the second member 45b. The third member 45c is formed in an annular shape so as to project radially inward from the inner peripheral surface of the second member 45b. One end face groove 42c is formed by the end faces on the side opposite to the base portion 3 in the direction of the axis O of the second member 45b and the third member 45c and the inner peripheral surface of the first member 45a. These first member 45a, second member 45b, and third member 45c are integrally formed to form the main body portion 45.

[0031] The attachment piece 46 is attached to the end portion on the base portion 3 side in the direction of the axis O of the main body portion 45. The attachment piece 46 has an annular portion 46a and a flange portion 46b. The annular portion 46a is an annular member that abuts against the second member 45b of the main body portion 45 from the radially inner side. The annular portion 46a projects to the base portion 3 side in the direction of the axis O more than the second member 45b. The flange portion 46b is provided at an end portion on the base portion 3 side in the direction of the axis O on the outer peripheral surface of the annular portion 46a. The flange portion 46b projects radially outward from the outer peripheral surface of the annular portion 46a. The flange portion 46b abuts against the second member 45b from the direction of the axis O and also abuts against the inner peripheral surface of the first member 45a from the radially inner side. These annular portion 46a and flange portion 46b are integrally formed to form the attachment piece 46.

[0032] The inner peripheral groove 42a of the outer cylinder portion 42 is formed by the inner peripheral surface of the second member 45b, the end face on the base portion 3 side in the direction of the axis O of the third member 45c, and the end face on the side opposite to the base portion 3 in the direction of the axis O of the attachment piece 46. The end face groove 42c is formed by the inner peripheral surface of the first member 45a and the end face on the base portion 3 side in the direction of the axis O of the attachment piece 46.

[0033] The attachment piece 46 is detachably provided in the direction of the axis O with respect to the main body 45. For example, when fitting the bush 41 into the inner circumferential groove 42a, the attachment piece 46 may be removed from the main body 45.

[0034] (Spring member) The spring member 7 biases against the movement of the slider 40. The spring member 7 of the present embodiment is a coil spring that can expand and contract in the direction of the axis O. A guide bar 10 is inserted through the spring member 7. The spring members 7 are provided on both sides in the direction of the axis O with the sliders 40 interposed therebetween. The end portion on the slider 40 side in the direction of the axis O of the spring member 7 is fixed in the end face groove 42c of the outer member 44. The end portion on the side opposite to the slider 40 in the direction of the axis O of the spring member 7 is fixed to the locking member 12.

[0035] When the supported body 20 generates a pressure wave toward the container 2 of the furnace 1 in the direction of the axis O, a reactive impact load in the direction of the axis O is generated on the supported body 20. The impact load is transmitted to the slider 40 and the spring member 7 through the load path L as shown in FIG. 3. Thereby, the slider 40 moves in the direction of the axis O along the guide bar 10. Then, the spring member 7 expands and contracts in the direction of the axis O and biases the slider 40 and the supported body 20 in a direction to cancel the impact load. In this way, the impact load is alleviated.

[0036] (Centering mechanism) Also, as shown in FIG. 4, the centering mechanism 60 is fixed to the base 3 and disposed outside the supported body 20. The centering mechanism 60 is provided so as to be able to contact the supported body 20 from a direction intersecting the axial direction of the axis O and to be slidable relative to the supported body 20 in the axial direction of the axis O. Specifically, the centering mechanism 60 is fixed to the base 3 via the mounting wall portion 4. Further, the centering mechanism 60 is disposed on the outer peripheral side of the supported body 20 (radially outside with respect to the central axis O1), and a plurality (four in the illustrated example) are provided around the supported body 20. These plurality of centering mechanisms 60 are arranged at equal intervals on the same circle C2. That is, the plurality of centering mechanisms 60 are arranged at equal intervals in the circumferential direction with respect to the central axis O1. The circle C2 where these plurality of centering mechanisms 60 are located is located inside the circle C1 where the plurality of guide bars 10 described above are located. More specifically, the centering mechanism 60 is provided one by one on both the upper and lower sides in the vertical direction of the supported body 20 and on both the horizontal sides (both the left and right sides in the horizontal direction of the supported body 20) perpendicular to the axial direction of the axis O.

[0037] (Function and effect) In the present embodiment, the buffer device 100 includes a base 3, a guide bar 10, a supported body 20, a slider 40, and a spring member 7. The guide bar 10 is connected to the base 3 and extends in the axial direction of the axis O. The supported body 20 is disposed along the guide bar 10 and is provided so as to be relatively movable in the axial direction of the axis O with respect to the base 3. The slider 40 is fixed to the supported body 20 and is provided so as to be slidable in the axial direction of the axis O with respect to the guide bar 10. The spring member 7 biases against the movement of the slider 40. Further, the slider 40 has a bush 41 that can automatically align the relative angle θ with respect to the axis O with respect to the guide bar 10.

[0038] Since the slider 40 moves along the guide bar 10 in the direction of the axis O, it is possible to suppress the displacement of the supported body 20 in a direction intersecting the axis O direction. Thereby, while allowing the movement of the supported body 20 in the axis O direction, the posture of the supported body 20 can be maintained. Therefore, it is possible to suppress the strong contact between the supported body 20 and the base 3 in a direction intersecting the axis O direction. That is, it is possible to avoid the generation of strong friction between the supported body 20 and the base 3. Further, the slider 40 can automatically align the relative angle θ with respect to the axis O with respect to the guide bar 10 by the bush 41. Thereby, even when the axis O of the guide bar 10 and the central axis O2 of the slider 40 are not completely parallel, the sliding of the slider 40 is not hindered. Therefore, even when the posture of the supported body 20 is slightly inclined, the slider 40 can relatively move along the guide bar 10, and the spring member 7 can also expand and contract in the axis O direction. Therefore, regardless of the posture of the supported body 20, the spring member 7 can bias the supported body 20 in the direction opposite to the impact load, so that the buffer function can be exhibited well. Furthermore, due to the automatic centering function of the bush 41, it is not necessary to perform alignment adjustment during installation of the buffer device 100. Or, the required accuracy for alignment during installation of the buffer device 100 can be relaxed, and the alignment of the buffer device 100 can be easily adjusted.

[0039] In the present embodiment, the bush 41 has an inner member 43 and an outer member 44. The inner member 43 covers the guide bar 10 from the outer peripheral side, is slidably attached to the outer peripheral surface of the guide bar 10 in the axis O direction, and has a spherical surface 43b formed on the outer peripheral side. The outer member 44 covers the inner member 43 from the outer peripheral side, is slidably attached to the inner member 43 along the spherical surface 43b, and is fixed to the supported body 20.

[0040] The inner member 43 is slidably attached to the guide bar 10 in the direction of the axis O. For this reason, the slider 40 is allowed to move along the guide bar 10 in the direction of the axis O. Further, the outer member 44 is allowed to move relative to the inner member 43 along the spherical surface 43b. Thereby, the bush 41 can automatically adjust the inclination with respect to the axis O. For this reason, even when the supported body 20 is inclined with respect to the axis O, the inclination is automatically absorbed by the outer member 44 sliding along the spherical surface 43b of the inner member 43. Also, it is possible to suppress the occurrence of local frictional force due to contact between the outer member 44 and the guide bar 10. Therefore, the slider 40 can move smoothly along the guide bar 10.

[0041] In the present embodiment, the supported body 20 is formed in a cylindrical shape extending in the direction of the axis O.

[0042] Thereby, it becomes easy to arrange the sliders 40 evenly around the supported body 20. Therefore, the installation accuracy of the buffer device 100 can be easily improved. Further, since the supported body 20 is hollow, the buffer device 100 can be made lighter.

[0043] In the present embodiment, the buffer device 100 is fixed to the base 3 and disposed outside the supported body 20, and further includes an alignment mechanism 60 that can contact the supported body 20 from a direction intersecting the axis O direction and is slidable relative to the supported body 20 in the axis O direction.

[0044] Thereby, the attitude of the supported body 20 can be adjusted along the guide bar 10 by the alignment mechanism 60. Further, it is possible to suppress the attitude of the supported body 20 from swinging in a direction intersecting the axis O direction. When an impact load is generated on the supported body 20 in the suspended state as in this embodiment, the supported body 20 swings (yawing and pitching) around its center of gravity. In this embodiment, a centering mechanism 60 is fixed to the base 3 at the end in the direction of the axis O of the supported body 20. That is, the centering mechanism 60 is fixed at a position spaced apart from the center of gravity of the supported body 20 in the direction of the axis O. Therefore, the supported body 20 can suppress the swing around the center of gravity of the supported body 20 well. In addition, the base 3 to which the centering mechanism 60 is fixed is a stable and strong wall portion constituting the container 2 of the furnace 1. Therefore, the centering mechanism 60 can receive the contact reaction force due to the swing of the supported body 20 with high support rigidity.

[0045] In this embodiment, a coil spring is used as the spring member 7. Thereby, the manufacturing cost of the buffer device 100 can be reduced.

[0046] <Second Embodiment> Hereinafter, the buffer device 200 according to the second embodiment of the present disclosure will be described with reference to FIGS. 5 and 6. Regarding the configurations similar to those of the above-described embodiment, the description will be appropriately omitted by attaching the same names and the same reference numerals.

[0047] Also in this embodiment, the centering mechanisms 260 are provided one each on both the upper and lower sides of the supported body 20 and on both the horizontal sides perpendicular to the axis O direction (both the left and right sides of the supported body 20). The centering mechanism 260 of this embodiment is a so-called leveling block. The centering mechanism 260 includes a casing 261, a first block 262, a second block 263, a first bolt 264, a second bolt 265, and a sliding portion 270. The casing 261 is fixed to the base 3 via the mounting wall portion 4. The casing 261 is fixed to the end face of the mounting wall portion 4 on the side opposite to the base 3 in the direction of the axis O. A storage recess 261a that opens to the supported body 20 side is formed in the casing 261.

[0048] The first block 262 is stored in the storage recess 261a. The entire first block 262 is disposed within the storage recess 261a. The first block 262 is stored in the storage recess 261a with spaces left on both sides in the direction of the axis O. Thereby, the first block 262 is movable in the direction of the axis O within the storage recess 261a. The inner surface 262a of the first block 262 facing the support 20 side is formed in a planar shape that gradually approaches the support 20 side as it approaches the base 3 side in the direction of the axis O.

[0049] The second block 263 is stored in the storage recess 261a and is placed on the first block 262. Both end faces of the second block 263 in the direction of the axis O are in contact with the inner side surfaces of the storage recess 261a respectively. The second block 263 protrudes from the storage recess 261a toward the support 20 side. The second block 263 has a main body portion 263a and a protrusion portion 263b. The main body portion 263a is placed on the first block 262. The outer surface 263c of the main body portion 263a facing away from the support 20 is formed in a planar shape that gradually approaches the support 20 side as it approaches the base 3 side in the direction of the axis O. The outer surface 263c of the main body portion 263a is formed to follow the inner surface 262a of the first block 262. The protrusion portion 263b protrudes from the end portion of the main body portion 263a on the support 20 side in the direction opposite to the base 3 in the direction of the axis O. The protrusion portion 263b and the main body portion 263a are integrally formed to form one second block 263.

[0050] The first bolt 264 is inserted in the direction from the bottom surface of the casing 261 toward the support 20 side (radially inward with respect to the central axis O1). The first bolt 264 penetrates through the casing 261 and the first block 262, and its tip is screwed into the second block 263. A threaded portion is formed on the outer peripheral surface of the first bolt 264.

[0051] The second bolt 265 is inserted in a direction from the side surface on the opposite side of the base 3 in the direction of the axis O of the casing 261 toward the base 3 in the direction of the axis O. The second bolt 265 penetrates the casing 261, and the tip thereof is where the first bolt 264 is inserted. The second bolt 265 is arranged on both circumferential sides with respect to the first bolt 264 about the central axis O1. A threaded portion is formed on the outer peripheral surface of the second bolt 265.

[0052] The sliding portion 270 is disposed opposite to the supported body 20. The sliding portion 270 is a member that is slidable in the direction of the axis O and deformable flexibly relative to the supported body 20. The sliding portion 270 of the present embodiment is a sliding material 271 having a lower rigidity than the supported body 20 and is formed in a flat plate shape. Examples of the sliding material 271 include PTFE (Poly Tetra Fluoro Ethylene).

[0053] The surface of the sliding material 271 facing the supported body 20 is formed in a shape along the outer peripheral surface of the supported body 20. The sliding material 271 is structured assuming wear by sliding with the supported body 20 in advance. For example, the thickness t of the sliding material 271 is set thick enough to maintain the sliding function of the centering mechanism 260 even if it wears due to sliding with the supported body 20. Also, as the sliding material 271, a block material that is difficult to wear may be employed.

[0054] In the present embodiment, the position of the sliding portion 270 with respect to the supported body 20 can be adjusted. An example of a method for adjusting the position of the sliding portion 270 will be described below. By turning the second bolt 265, the first block 262 moves in the direction of the axis O. As a result, the second block 263 approaches and separates from the supported body 20. Since the sliding portion 270 is placed on the second block 263, it approaches and separates from the supported body 20 in conjunction with the second block 263. After completion of the position adjustment of the sliding portion 270, the first bolt 264 is inserted to fix the positions of the first block 262 and the second block 263. Thereby, the position of the sliding portion 270 is fixed. Through the above procedure, the position adjustment of the sliding portion 270 with respect to the supported body 20 is completed.

[0055] (Function and Effect) Also in the second embodiment, the same components as those in the first embodiment described above can exhibit the same functions and effects. In the present embodiment, the centering mechanism 260 may be disposed opposite to the support 20 and may have a sliding portion 270 that is slidable relative to the support 20 and is more flexible than the support 20 in terms of deformation. Thereby, with a simple configuration, slidability of the centering mechanism 260 with respect to the support 20 can be imparted.

[0056] The sliding portion 270 of the present embodiment is a sliding material 271 that is less rigid than the support 20 as in the present embodiment. Thereby, damage to the support 20 can be avoided when the support 20 and the centering mechanism 260 slide relative to each other.

[0057] <Third Embodiment> Hereinafter, a buffer device 300 according to a third embodiment of the present disclosure will be described with reference to FIGS. 7 and 8. For the same components as those in the above-described embodiments, the description will be appropriately omitted by assigning the same names and the same reference numerals.

[0058] Also in the present embodiment, the centering mechanisms 360 are respectively provided one by one on both the upper and lower sides of the support 20 in the vertical direction and on both the horizontal sides perpendicular to the direction of the axis O (both the left and right sides of the support 20 in the horizontal direction). In the present embodiment, the centering mechanism 360 further includes a second spring member 361 in addition to the casing 261, the first block 262, the second block 263, the first bolt 264, the second bolt 265, and the sliding portion 270. The inner surface of the second block 263 of the present embodiment facing the support 20 is flush with the inner surface of the casing 261 facing the support 20.

[0059] The second spring member 361 biases the sliding portion 270 in a direction intersecting the axis O direction with respect to the supported body 20. In the present embodiment, the second spring member 361 is provided on the outer peripheral side of the supported body 20 and between the second block 263 and the sliding portion 270. That is, the second spring member 361 is located on the side opposite to the supported body 20 with the sliding portion 270 interposed therebetween. The second spring member 361 biases the sliding portion 270 and presses the sliding portion 270 against the supported body 20. Examples of the second spring member 361 include elastic materials such as rubber and urethane, disc springs, bump foils, mesh foils, and the like.

[0060] (Function and effect) Also in the third embodiment, for the same configurations as those of the first and second embodiments described above, the same functions and effects can be exhibited. In the present embodiment, the centering mechanism 360 further includes a second spring member 361 that biases the sliding portion 270 in a direction intersecting the axis O direction with respect to the supported body 20.

[0061] Thereby, when the supported body 20 swings and the supported body 20 contacts the sliding portion 270 during centering return, the impact can be mitigated. Also, by the second spring member 361, pre-compression can be applied to the sliding portion 270, and the sliding portion 270 can be pressed against the supported body 20. Thereby, the supported body 20 and the sliding portion 270 can always be in contact with each other, and friction can always be applied to the supported body 20. Therefore, the swing of the supported body 20 can be quickly attenuated. Also, even if the sliding portion 270 wears and its thickness decreases, the centering mechanism 360 can bias the sliding portion 270 against the supported body 20 with a force that does not change from before the wear by the second spring member 361.

[0062] Also, as shown in FIGS. 9 and 10, the centering mechanism 360A may have a brush 271A facing the supported body 20 side as the sliding portion 270A instead of the sliding member 271.

[0063] <Fourth Embodiment> Hereinafter, the buffer device 400 according to the fourth embodiment of the present disclosure will be described with reference to FIGS. 11 and 12. For the same configurations as those in the above-described embodiments, the description will be appropriately omitted by assigning the same names and the same reference numerals.

[0064] Also in this embodiment, the centering mechanism 460 is provided one by one on both the upper and lower sides of the supported body 20 in the vertical direction and on both the horizontal sides (both the left and right sides of the supported body 20) perpendicular to the axis O direction. In this embodiment, the centering mechanism 460 includes, in addition to the casing 261, the first block 262, the second block 263, the first bolt 264, and the second bolt 265, a support portion 461, a rotating shaft 462, and a wheel 463.

[0065] The support portion 461 is provided on the inner surface of the second block 263 facing the supported body 20 side. A pair of support portions 461 are provided at intervals in the circumferential direction about the central axis O1. The support portion 461 extends toward the supported body 20 side. The support portion 461 is formed in a triangular shape that tapers as it approaches the supported body 20 side when viewed from the circumferential direction about the central axis O1.

[0066] The rotating shaft 462 is provided between the pair of support portions 461. The rotating shaft 462 connects the tops of the pair of support portions 461 on the supported body 20 side.

[0067] The wheel 463 is provided between the pair of support portions 461. The wheel 463 is inserted through the rotating shaft 462. The wheel 463 is provided so as to be rotatable about the rotating shaft 462. Thereby, the wheel 463 can come into contact with the outer peripheral surface of the supported body 20 and roll in the axis O direction.

[0068] (Function and effect) Also in the fourth embodiment, for the same configurations as those in the first to third embodiments described above, the same functions and effects can be exhibited. In this embodiment, the centering mechanism 460 has a wheel 463 that comes into contact with the supported body 20 and can roll in the axis O direction.

[0069] As a result, the wheel 463 has less wear than the sliding member 271, so that the frequency of replacing the wheel 463 can be significantly reduced. Therefore, the maintainability can be improved. Further, when the moving speed of the supported body 20 is high when an impact load is applied, the impact load applied to the centering mechanism 460 can be favorably dissipated.

[0070] (Other Embodiments) As described above, the embodiments of the present disclosure have been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes and the like within the scope not departing from the gist of the present disclosure are also included. In the above embodiment, it is assumed that the buffer devices 100, 200, 300, 300A, and 400 are used in the furnace 1 such as coal, oil, and waste. However, the present disclosure is not limited to this. For example, the buffer devices 100, 200, 300, 300A, and 400 may be used in a boiler, a gasifier, a reactor, a heat exchanger, a transmission, or the like.

[0071] In the above embodiment, it is assumed that the guide bar 10 is indirectly connected to the base 3 via the mounting wall portion 4. However, the present disclosure is not limited to this. The mounting wall portion 4 may not be provided, and the guide bar 10 may be directly connected to the base 3.

[0072] In the above embodiment, it is assumed that the guide bar 10 of the present embodiment is formed in a shaft shape extending in the direction of the axis O. However, the present disclosure is not limited to this. The shape of the guide bar 10 can be appropriately changed. The guide bar 10 may be formed, for example, in a prismatic shape extending in the direction of the axis O.

[0073] In the above embodiment, it is assumed that the supported body 20 is formed in a cylindrical shape extending in the direction of the axis O. However, the present disclosure is not limited to this. The shape of the supported body 20 can be appropriately changed. The supported body 20 may be formed, for example, in a prismatic shape or a block shape extending in the direction of the axis O.

[0074] In the above-described embodiments, the case where the shock absorbers 100, 200, 300, 300A, and 400 include the pressing member 5 has been described. However, the shock absorbers 100, 200, 300, 300A, and 400 may not include the pressing member 5.

[0075] In the above-described embodiments, the case where the bush 41 is a spherical bush has been described as an example. However, the present invention is not limited to this. For example, the bush 41 may be another bush such as a rubber bush having a function of automatically aligning (adjusting) the relative angle θ with respect to the axis O.

[0076] In the present embodiment, the case where four sets of the combination of the guide bar 10 and the slider 40 are arranged on the same circle C1 when viewed from the direction of the axis O has been described. However, the present invention is not limited to this. The number and arrangement of the guide bar 10 and the slider 40 can be appropriately changed.

[0077] In the present embodiment, the case where four centering mechanisms 60, 260, 360, 360A, and 460 are arranged on the same circle C2 when viewed from the direction of the axis O has been described. However, the present invention is not limited to this. The number and arrangement of the centering mechanisms 60, 260, 360, 360A, and 460 can be appropriately changed.

[0078] <Supplementary Note> The shock absorbers 100, 200, 300, 300A, and 400 described in each embodiment are understood as follows, for example.

[0079] (1) The shock absorbers 100, 200, 300, 300A, and 400 according to the first aspect include a base 3, a guide bar 10 connected to the base 3 and extending in the direction of the axis O, a supported body 20 arranged along the guide bar 10 and relatively movable in the direction of the axis O with respect to the base 3, a slider 40 fixed to the supported body 20 and slidable in the direction of the axis O with respect to the guide bar 10, and a spring member 7 that biases against the movement of the slider 40. The slider 40 has a bush 41 that can automatically align the relative angle θ with respect to the axis O with respect to the guide bar 10. As an example of the base 3, the wall portion of the furnace 1 in the above-described embodiment and the like can be mentioned. As an example of the supported body 20, a combustion tube or the like that generates a pressure wave in the above-described embodiment can be mentioned. As an example of the spring member 7, a coil spring or the like in the above-described embodiment can be mentioned. As an example of the bush 41, a spherical bush, a rubber bush, or the like in the above-described embodiment can be mentioned.

[0080] Since the slider 40 moves along the guide bar 10 in the direction of the axis O, it is possible to prevent the supported body 20 from shifting in a direction intersecting the axis O direction. Further, the slider 40 can automatically align the relative angle θ with respect to the axis O with respect to the guide bar 10 by the bush 41. Thereby, even when the axis O of the guide bar 10 and the central axis O1 of the slider 40 are not completely parallel, the sliding of the slider 40 is not hindered.

[0081] (2) The shock absorbers 100, 200, 300, 300A, 400 of the second aspect are the shock absorbers 100, 200, 300, 300A, 400 of the first aspect, wherein the bush 41 covers the guide bar 10 from the outer peripheral side and is slidably attached to the outer peripheral surface of the guide bar 10 in the direction of the axis O, and has an inner member 43 having a spherical surface 43b formed on the outer peripheral side, and an outer member 44 that covers the inner member 43 from the outer peripheral side and is slidably attached to the inner member 43 along the spherical surface 43b and is fixed to the supported body 20.

[0082] The inner member 43 is slidably attached to the guide bar 10 in the direction of the axis O. For this reason, the slider 40 is allowed to move in the direction of the axis O along the guide bar. Further, the outer member 44 is allowed to move relative to the inner member 43 along the spherical surface 43b. Thereby, the bush 41 can automatically adjust the inclination with respect to the axis O.

[0083] (3) The shock absorbers 100, 200, 300, 300A, 400 of the third aspect are the shock absorbers 100, 200, 300, 300A, 400 of the first or second aspect, and the supported body 20 may be formed in a cylindrical shape extending in the direction of the axis O.

[0084] Thereby, it becomes easier to arrange the slider 40 evenly around the supported body 20. Furthermore, since the supported body 20 is hollow, the shock absorbers 100, 200, 300, 300A, 400 can be lightened.

[0085] (4) The shock absorbers 100, 200, 300, 300A, 400 of the fourth aspect are any one of the shock absorbers 100, 200, 300, 300A, 400 of the first to third aspects, and are fixed to the base portion 3 and disposed outside the supported body 20, and may further include centering mechanisms 60, 260, 360, 360A, 460 that can contact the supported body 20 from a direction intersecting the direction of the axis O and are slidable relative to the supported body 20 in the direction of the axis O.

[0086] Thereby, the attitude of the supported body 20 can be adjusted along the guide bar by the centering mechanisms 60, 260, 360, 360A, 460. Furthermore, it is possible to suppress the attitude of the supported body 20 from swinging in a direction intersecting the direction of the axis O.

[0087] (5) The shock absorbers 200, 300, 300A of the fifth aspect are the shock absorbers 200, 300, 300A of the fourth aspect, and the centering mechanisms 260, 360, 360A may have sliding portions 270, 270A that are disposed opposite to the supported body 20, are slidable relative to the supported body 20, and are deformable more flexibly than the supported body 20.

[0088] Thereby, with a simple configuration, slidability with respect to the supported body 20 can be imparted to the centering mechanisms 260, 360, 360A. Examples of the sliding portions 270, 270A include the sliding material 271 and the brush 271A of the above-described embodiment.

[0089] (6) The shock absorbers 300 and 300A of the sixth aspect are the shock absorbers 300 and 300A of the fifth aspect, and the centering mechanisms 360 and 360A may further include a second spring member 361 that biases the sliding portions 270 and 270A in a direction intersecting the axis O direction with respect to the supported body 20. Examples of the second spring member 361 include elastic materials such as rubber and urethane, disc springs, bump foils, mesh foils, and the like.

[0090] Thereby, when the supported body 20 swings and the supported body 20 contacts the sliding portions 270 and 270A for centering return, the impact can be mitigated. Further, by the second spring member 361, pre-compression can be applied to the sliding portions 270 and 270A, and the sliding portions 270 and 270A can be pressed against the supported body 20. Thereby, the supported body 20 and the sliding portions 270 and 270A can always be in contact, and friction can always be applied to the supported body 20. Therefore, the swing of the supported body 20 can be attenuated quickly.

[0091] (7) The shock absorber 400 of the seventh aspect is the shock absorber 400 of the fourth aspect, and the centering mechanism 460 may include a wheel 463 that contacts the supported body 20 and is rollable in the axis O direction.

[0092] Thereby, since the wheel 463 has less wear than the sliding material 271, the frequency of replacing the wheel 463 can be significantly reduced. Further, when the moving speed of the supported body 20 is high when an impact load is applied, the impact load applied to the centering mechanism 460 can be favorably dissipated.

Explanation of Reference Numerals

[0093] 1…Furnace 2…Container 3…Base 3a…Opening 4…Mounting wall portion 4a…Opening 5…Restraining member 6…Flange 6a…Engaging groove 7…Spring member 10…Guide bar 11…Guide bar body 12…Locking member 13…Fixed end 20…Supported body 21…Cylindrical portion 22…Outer ring 30…Support mechanism 31…Fastener 32…Wire 40…Slider 41…Bush 42…Outer cylindrical portion 42a…Inner circumferential groove 42b…Outer circumferential groove 42c…End face groove 43…Inner member 43a…Inner surface 43b…Spherical surface 44…Outer member 44a…Inner surface 44b…Outer surface 45…Body portion 45a…First member 45b…Second member 45c…Third member 46…Mounting piece 46a…Ring portion 46b…Flange portion 60…Centering mechanism 100…Shock absorber C1…Circle C2…Circle L…Load path O…Axis O1…Central axis O2…Central axis 200…Shock absorber 260…Centering mechanism 261…Casing 261a…Receiving recess 262…First block 262a…Inner surface 263…Second block 263a…Body portion 263b…Protrusion 263c…Outer surface 264…First bolt 265…Second bolt 270…Sliding portion 271…Sliding material t…Thickness 300…Shock absorber 360…Centering mechanism 361…Second spring member 300A…Shock absorber 360A…Centering mechanism 270A…Sliding portion 271A…Brush 400…Shock absorber 460…Centering mechanism 461…Support portion 462…Rotating shaft 463…Wheel

Claims

1. A base, a guide bar connected to the base and extending in the axial direction, a supported body disposed along the guide bar and relatively movable in the axial direction with respect to the base, a slider fixed to the supported body and slidable in the axial direction with respect to the guide bar, a spring member that biases against the movement of the slider, a centering mechanism that is fixed to the base and disposed outside the supported body, can contact the supported body from a direction intersecting the axial direction, and is slidable in the axial direction relative to the supported body, comprising: The slider is a shock absorber having a bush capable of automatically aligning the relative angle with respect to the axis with respect to the guide bar.

2. The bush covers the guide bar from the outer peripheral side, is slidably attached to the outer peripheral surface of the guide bar in the axial direction, and has an inner member having a spherical surface formed on the outer peripheral side, covers the inner member from the outer peripheral side, is slidably attached to the inner member along the spherical surface, and has an outer member fixed to the supported body, The shock absorber according to claim 1, having the same.

3. The shock absorber according to claim 1 or 2, wherein the supported body is formed in a cylindrical shape extending in the axial direction.

4. The shock absorber according to claim 1, wherein the centering mechanism is disposed opposite to the supported body and has a sliding portion that is slidable relative to the supported body and deformable more flexibly than the supported body.

5. The shock absorber according to claim 4, wherein the centering mechanism further has a second spring member that biases the sliding portion in a direction intersecting the axial direction with respect to the supported body.

6. A base, a guide bar connected to the base and extending in the axial direction, a supported body disposed along the guide bar and relatively movable in the axial direction with respect to the base, a slider fixed to the supported body and slidable in the axial direction with respect to the guide bar, a spring member that biases against the movement of the slider, a centering mechanism that is fixed to the base and disposed outside the supported body, can contact the supported body from a direction intersecting the axial direction, and has a wheel that can contact the supported body and roll in the axial direction, comprising: The slider is a shock absorber having a bush capable of automatically aligning the relative angle with respect to the axis with respect to the guide bar.

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