JP2019135971A - Nozzle support structure - Google Patents

Abstract

To provide a support structure enabling a boom to support properly a supply pipe including a nozzle.SOLUTION: A nozzle support structure includes a support mechanism S for supporting, with a displaceable relative position, a bracket 26 supported by a boom 21, and a support plate 25 forming a holder 23, including an agent supply pipe 22 arranged in a longer direction of the boom 21, the holder 23 to which a part of the agent supplied to the agent supply pipe 22 is sent from an open hole 22a on the outer periphery of the agent supply pipe 22, by being held on the outer periphery of the agent supply pipe 22, and a spray nozzle 24 provided on the holder 23, for spraying the agent from the holder 23.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a nozzle support structure that supports a nozzle in a configuration in which a supply pipe having a nozzle is arranged in a longitudinal direction of a boom.

  As a nozzle support structure having the above-described configuration, Patent Document 1 includes a supply pipe (a nozzle pipe in the reference) along the longitudinal direction of the boom, and a plurality of nozzles are provided at a set interval with respect to the supply pipe. Describes the technology supported.

  In the technique of this Patent Document 1, a nozzle is supported on the supply pipe so that the medicine is directly supplied from the supply pipe, and judging from the drawings (FIG. 1, FIG. 3, etc.), the supply pipe is connected to the bracket. Etc. to support the boom.

JP 2008-200005 A

  As described in Patent Document 1, in a configuration in which a plurality of brackets and the like are fixed to the boom with bolts or the like in order to support a supply pipe having a plurality of nozzles to the boom, the surface of the boom is caused by a dimensional error of the brackets or the like. However, it may be difficult to support the supply pipe in a parallel posture.

  For example, if the supply pipe is made of a metal pipe material, the rigidity of the supply pipe is high, and if the supply pipe cannot be supported in an appropriate posture as described above, an excessive external force acts on the supply pipe. In some cases, the bracket cannot be properly connected to the bracket.

  For this reason, a support structure that can properly support a supply pipe provided with a nozzle on a boom is required.

The characteristic configuration of the nozzle support structure according to the present invention includes a supply pipe disposed along the longitudinal direction of the boom,
A holder in which a part of the fluid supplied to the supply pipe is sent from a through-hole on the outer periphery of the supply pipe by being held on the outer periphery of the supply pipe;
A nozzle that is provided in the holder and sprays the fluid fed to the holder;
A support mechanism for supporting a bracket supported by the boom and a support portion formed on the holder so as to be relatively displaceable is provided.

According to this characteristic configuration, the support portion and the bracket formed on the holder can be supported in a state where relative position displacement is allowed by the support mechanism. In this support form, displacement of the relative position between the support portion and the bracket is allowed. For example, even when there is a dimensional error in a plurality of brackets, the support mechanism absorbs the dimensional error so that the supply pipe is properly connected to the boom. It can be supported in a posture, and the inconvenience that an unreasonable external force acts on the supply pipe and the connection to the bracket or the like cannot be solved.
Therefore, the support structure which can support the supply pipe provided with the nozzle to the boom appropriately is configured.

As another configuration, the support portion is configured by a support plate provided in the holder, and a first through hole is formed in the support plate.
A second through hole is formed in the bracket;
The support mechanism includes a first buffer member made of an elastic material having a first bolt insertion hole;
The first buffer member is sandwiched between a support surface of the support plate and a connection surface of the bracket, a bolt is inserted through the first through hole, the first bolt insertion hole, and the second through hole, The support plate and the bracket may be coupled by fastening bolts.

  According to this, the first through hole of the support plate and the first bolt insertion hole of the first buffer member with the first buffer member made of an elastic material sandwiched between the support surface of the support plate and the connecting surface of the bracket. A bolt is inserted into the bracket and the second through hole of the bracket, and the support plate and the bracket are connected by tightening. In this connected state, the first buffer member is elastically deformed, so that the relative displacement between the support plate and the bracket is caused in both the direction along the axis of the bolt and the direction perpendicular to the axis of the bolt. Allowed and can properly support the supply pipe against the boom.

As another configuration, the support portion is configured by a support plate provided in the holder, and a first through hole is formed in the support plate.
A second through hole is formed in the bracket;
The support mechanism includes a second buffer member made of an elastic material having a second bolt insertion hole;
The support plate is disposed at a position where the support surface of the support plate and the connection surface of the bracket face each other, and the surface of the support plate opposite to the support surface or the bracket of the support plate opposite to the connection surface. The second buffer member is disposed so as to contact the surface, and a bolt inserted through the second bolt insertion hole of the second buffer member is inserted into the first through hole and the second through hole, The support plate and the bracket may be coupled by fastening bolts.

  According to this, the bolt inserted into the second bolt insertion hole of the second buffer member made of an elastic material in a state where the support surface of the support plate and the connecting surface of the bracket are in contact with the first through hole of the support plate. The support plate and the bracket are connected by being inserted into the second through hole of the bracket and tightening the bolt. In this connected state, the second buffer member is elastically deformed to allow relative displacement of the support plate and the bracket in a direction along the support surface of the support plate and the connection surface of the bracket, and the supply pipe is properly connected to the boom. I can support it.

  As another configuration, a bush capable of inserting the bolt is fitted into the second bolt insertion hole of the second buffer member, and one of the first through hole of the support plate and the second through hole of the bracket. May have a larger diameter than the other, and the second buffer member may be arranged in a state where a part of the first through hole and the second through hole is inserted into a larger diameter.

  According to this, one of the first through hole and the second through hole has a larger diameter than the other, and the second buffer member is inserted in a state in which a part of the second buffer member is inserted into the through hole having the large diameter. By disposing, in a state where the displacement of the second buffer member is suppressed, the support surface of the support plate and the contact surface of the connecting surface of the bracket are pressed together, and the relative displacement in the direction along the support surface and the connecting surface is reduced. Allowed by elastic deformation of the second buffer member. Moreover, since the bush is provided, the inconvenience of excessively compressing the second buffer member when fastening with the bolt can be solved.

As another configuration, the support portion is configured by a support plate provided in the holder, and a first through hole is formed in the support plate.
A second through hole is formed in the bracket;
The support mechanism includes a first buffer member made of an elastic material having a first bolt insertion hole and a second buffer member made of an elastic material having a second bolt insertion hole;
The first buffer member is sandwiched between a support surface of the support plate and a connection surface of the bracket, and a surface of the support plate opposite to the support surface or a side of the bracket opposite to the connection surface. The second buffer member is disposed so as to contact the surface of
The support plate and the bracket may be connected by fastening bolts that pass through the first through hole, the second through hole, the first bolt insertion hole, and the second bolt insertion hole.

  According to this, the first buffer member made of an elastic material is sandwiched between the support surface of the support plate and the connection surface of the bracket, and the surface of the support plate opposite to the support surface or the connection surface of the bracket is opposite to the connection surface. With the second buffer member in contact with the side surface, a bolt is inserted into the first through hole, the second through hole, the first bolt insertion hole, and the second bolt insertion hole, and the support plate is fastened. The bracket can be connected. In this connected state, relative displacement of the support plate and the bracket is allowed by elastic deformation of the first buffer member and the second buffer member, and the supply pipe can be properly supported with respect to the boom.

  As another configuration, the first buffer member and the second buffer member may be integrated.

  According to this, by comprising the 1st buffer member and the 2nd buffer member as an integrated object, handling is easy and the assembly of a nozzle support structure can also be performed easily.

As another configuration, the holder includes a first holder having a semicircular pressure-bonding surface so as to embrace the supply pipe, and embraces an opposite side of the supply pipe to an area where the first holder embraces. A second holder having a semicircular crimping surface and an internal flow path through which a fluid is sent, and a screw for connecting and fixing the first holder and the second holder,
The nozzle is provided in the second holder in a state communicating with the internal flow path;
The support plate may be fixed to the first holder with the screws by fastening.

  According to this, by connecting the first holder and the second holder with screws, the supply pipe can be placed in a state of being held by the holder, and the fluid from the through-hole on the outer periphery of the supply pipe can be placed in the internal flow path of the second holder. Can be supplied to the nozzle. Further, the support plate can be fixed to the first holder by tightening the screws.

  As another configuration, the bracket has an attachment surface that is supported in contact with an outer wall of the boom or a support provided on the boom, and the attachment surface and the connection surface are orthogonal to each other. It may be formed.

  According to this, in a state in which the mounting surface of the bracket is provided in contact with the outer wall of the boom or the boom and in contact with the support body, the bracket extends in a direction along the surface where the support surface of the support plate and the connection surface of the bracket contact. By allowing relative displacement with the support plate, the position of the supply pipe can be properly maintained with respect to the boom.

It is a side view of a chemical spreader. It is a top view of a chemical spreader. It is a perspective view which shows a boom, a chemical | medical agent supply pipe | tube, and a spray nozzle. It is a disassembled perspective view of a nozzle support structure. It is sectional drawing of a nozzle support structure. It is sectional drawing of the nozzle support structure of another embodiment (a).

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 show a riding type medicine spreader A. FIG. In these drawings, F indicates “forward”, B indicates “rear”, U indicates “upward”, and D indicates “downward”. R indicates “right direction”, and L indicates “left direction”.

(Overall configuration of riding type drug spreader)
As shown in FIGS. 1 and 2, the drug spreader A includes a left and right front wheel 1, a left and right rear wheel 2, and a machine body 3 configured to be freely movable. A drug tank 4 is provided at the center of the machine body 3. The engine 5 and the pump 6 are supported at the rear of the body 3. A driving unit 7 is disposed at the front of the body 3, and the driving unit 7 includes a driving seat 8 and a steering wheel 9, and an operation lever, a pedal, and the like.

  A boom 21 (upper position of the center boom 21a and the side boom 21b can be swung up and down via a lifting link mechanism L and at a position protruding in the front direction F from the front end of the airframe 3 and via a rolling mechanism E. Concept) is supported.

  The elevating link mechanism L has a drive structure that moves up and down by an electric elevating cylinder 12, and the rolling mechanism E has a link structure that maintains the boom 21 in a horizontal posture by the weight of the boom 21.

  The boom 21 includes a center boom 21a at the center in the left-right direction, a left side boom 21b, and a right side boom 21b. Each boom 21 is provided with a medicine supply pipe 22 along the longitudinal direction, and the medicine supply pipe 22 is provided with a spray nozzle 24 via a number of holders 23. Details of the support structure of the medicine supply tube 22 will be described later.

  The left and right side booms 21b are supported at the outer end of the center boom 21a via the open / close bracket 14 so as to be swingable and openable about the swing axis. Furthermore, an electric cylinder 15 that swings and opens the side boom 21b is provided near the outer end of the center boom 21a.

  From this configuration, at the time of spraying work, the left and right side booms 21b are set to a use posture shown by a two-dot chain line in FIG. 2, and the pump 6 is driven by the engine 5 to spray the medicine in the medicine tank 4 from the spray nozzle 24. The medicine is sprayed on the field by spraying and running the airframe 3.

  When the work is not performed, the left and right side booms 21b are set in the retracted posture shown by the solid line in FIG. 2 to allow the medicine spreader A to be parked in a predetermined space. In this retracted posture, the swinging axis core posture is set so that the side boom 21b is inclined obliquely upward, and in this retracted posture, the retractor is disposed at a position where it enters the left and right outwards from the body 3. The left and right side booms 21b are placed on the holder 13 so that the posture can be held.

(Nozzle support structure)
A metal pipe material is used for the medicine supply pipe 22, and in order to support the medicine supply pipe 22 on the boom 21, a support plate 25 as a support portion and a bracket 26 are provided as shown in FIGS. And a support mechanism S, a holding bolt 28 inserted therethrough, and a nut 29 that is screwed into the holding bolt 28.

  The support mechanism S has a function of supporting the support plate 25 and the bracket 26 in a state in which relative position displacement is allowed by elastic deformation of the elastic material. Even when the support plate 25 and the bracket 26 have a dimensional error, It is possible to support the medicine supply tube 22 without applying an excessive force.

  In other words, each of the plurality of support plates 25 has a dimensional error, and the plurality of brackets 26 also have a dimensional error. In such a case, it is difficult to provide the boom 21 and the medicine supply tube 22 in a posture in which they are parallel to each other. Further, since the bracket 26 is attached to the boom 21 by the connecting bolt 34 with the interval between the plurality of through holes 22 a formed in the medicine supply pipe 22, there is an error in the relationship between the bolt holes formed in the boom 21. In some cases (when there is an error between the value of twice the interval between the through holes 22a and the value of the interval between the bolt holes formed in the boom 21), the attachment becomes difficult. In order to eliminate such inconvenience, the medicine supply pipe 22 is supported by the boom 21 by the nozzle support structure using the support mechanism S.

  As described above, the medicine supply pipe 22 is provided with the spray nozzle 24 via the holder 23. The nozzle support structure is a structure for supporting the medicine supply pipe 22 having the holder 23 and the spray nozzle 24 with respect to the boom 21, but this nozzle support structure is not provided in all the holders 23. 2. As shown in FIG. 3, one of the plurality of holders 23 is provided in the arrangement direction (every other).

  As shown in FIG. 4, through holes 22a are formed on the outer periphery of the medicine supply pipe 22 at set intervals. In order to send out the medicine sent from the through holes 22a to the spray nozzle 24, the portion where the through holes 22a are formed is formed. A holder 23 is provided at a position to be held.

  As a specific configuration, as shown in FIGS. 3 to 5, the holder 23 includes a first holder 23 a having a semicircular pressure bonding surface so as to embrace the medicine supply tube 22, and the first holder 23 a A second holder 23b having a semicircular crimping surface so as to embrace the side opposite to the region to be embrace, and a pair of screws 31 for connecting them are provided. An internal flow path 23L for sending a medicine from the through hole 22a is formed inside the second holder 23b, and the medicine from the internal flow path 23L is supplied to the spray nozzle 24.

  The second holder 23b is provided with a seal ring 32 for preventing the medicine from leaking from the through hole 22a, and a packing 33 for preventing the medicine from leaking at the connecting portion between the second holder 23b and the spray nozzle 24.

  The support plate 25 (support portion) includes a fixed piece 25a fixed to the first holder 23a and a support piece 25b in a posture orthogonal to the fixed piece 25a. The support piece 25b is held in a horizontal posture. The support piece 25b has a first through hole 25H penetrating in the vertical direction and a support surface 25S formed on the lower surface.

  The fixed piece 25a of the support plate 25 is formed with a pair of holes through which the pair of screws 31 are inserted, and the support plate 25 is fixed to the first holder 23a by tightening the screws 31 through which the holes are inserted. Is done.

  The bracket 26 includes a holding piece 26a attached to a support body 35 provided in the boom 21, and a connecting piece 26b that is in a horizontal posture in a posture orthogonal to the holding piece 26a. In the boom 21, a pair of bolt holes is formed in the holding piece 26 a, and the bracket 26 is fixed to the support body 35 of the boom 21 by a connecting bolt 34 inserted through the bolt hole.

  Further, the connecting piece 26b is formed with a second through hole 26H that vertically penetrates the connecting piece 26b, and a connecting surface 26S is formed on the upper surface. Further, a mounting surface 26T is formed on the surface of the holding piece 26a facing the boom 21.

  The support mechanism S uses a buffer grommet 27 (an example of a second buffer member) that is formed into a disk shape from rubber or resin that can be flexibly deformed. A grommet hole 27a (an example of a second bolt hole) is formed in the central portion of the buffer grommet 27, and protrudes so as to surround the grommet hole 27a on the upper surface of the buffer grommet 27 in the posture shown in FIGS. A portion 27T is formed, and a bush 27b is fitted into the grommet hole portion 27a.

  In this nozzle support structure, the diameter of the first through hole 25H is a value that allows the holding bolt 28 to be inserted, and the diameter of the second through hole 26H is sufficiently larger than the diameter of the first through hole 25H. The projection 27T of the buffer grommet 27 is set to a size to be fitted.

(Nozzle support structure: support state)
With such a structure, when the medicine supply pipe 22 having the holder 23 and the spray nozzle 24 is supported on the boom 21, as shown in FIGS. 4 and 5, the support surface 25S of the support plate 25 and the bracket 26 are provided. The holding bolt 28 is inserted from the first through hole 25 </ b> H of the support plate 25 to the second through hole 26 </ b> H of the bracket 26 in a state where the connecting surface 26 </ b> S is in contact with the connecting surface 26 </ b> S.

  In this embodiment, a support body 35 is provided on the outer wall of the boom 21, and the mounting surface 26 </ b> T of the holding piece 26 a of the bracket 26 is brought into contact with the support wall portion 35 a of the support body 35 and is connected by the connection bolt 34. It is fixed.

  As described above, in the state where the holding bolt 28 is inserted from the first through hole 25H to the second through hole 26H, the protruding portion 27T of the buffer grommet 27 is connected to the second portion of the connecting piece 26b from the opposite side of the connecting surface 26S. The holding bolt 28 is inserted into the through-hole 26 </ b> H, and the holding bolt 28 is inserted into the bush 27 b of the grommet hole 27 a of the buffer grommet 27.

  With this tightening, the medicine supply pipe 22 is supported by the boom 21 by connecting and fixing the bracket 26 to the boom 21 with the connection bolt 34 in a state where the connection surface 26 </ b> S of the bracket 26 is in contact with the outer surface of the boom 21. In this state, the protruding portion 27T of the buffer grommet 27 is fitted into the second through hole 26H, so that the position of the buffer grommet 27 with respect to the bracket 26 is determined.

  As described above, when the medicine supply pipe 22 is supported on the boom 21, the support surface 25S and the connection surface 26S are elastically deformed while the buffer grommet 27 is elastically deformed while the contact between the support surface 25S and the connection surface 26S is maintained. Since the relative movement of the support plate 25 and the bracket 26 is allowed in the direction along the virtual plane in contact with each other, there is a dimensional error in each of the plurality of support plates 25 due to the relative movement, or the plurality of brackets 26. Even if there is a dimensional error in each of these, an excessive external force is not applied to the medicine supply tube 22 even in the support state.

  In this configuration, the bush 27 b has such a length that one end abuts on the support piece 25 b and the other end abuts on the washer 30 when the buffer grommet 27 is elastically deformed by a predetermined amount by tightening with the holding bolt 28. Is set. Thereby, excessive compression of the buffer grommet 27 is suppressed, and sliding between the support surface 25S and the connection surface 26S is enabled.

  In this embodiment, the holding bolt 28 is inserted into the bracket 26 and the buffer grommet 27 from the support plate 25 side, but functions similarly even if the holding bolt 28 is inserted in the opposite direction. Specifically, as compared with the configuration of FIG. 5, the first through hole 25H formed in the support piece 25b of the support plate 25 is set to have a larger diameter than the second through hole 26H, and the upper surface of the support piece 25b. The buffer grommets 27 may be arranged on the side, and the protrusions 27T of the buffer grommets 27 may be connected to each other through the first through holes 25H.

[Another embodiment]
In addition to the above-described embodiments, the present invention may be configured as follows (the components having the same functions as those of the embodiments are given the same numbers and symbols as those of the embodiments).

(A) As shown in FIG. 6, as the support mechanism S, an elastic material formed into a disk shape with rubber or resin that can be deformed flexibly is used, and a plate hole 41H (an example of a first bolt insertion hole) A buffer plate 41 (an example of a first buffer member) is provided. In the same figure, the form which used together the buffer plate 41 and the buffer grommet 27 shown in embodiment is shown.

  That is, the buffer plate 41 is disposed at a position sandwiched between the support surface 25S of the support piece 25b of the support plate 25 and the connection surface 26S of the connection piece 26b of the bracket 26, and the connection surface 26S of the connection pieces 26b of the bracket 26 A buffer grommet 27 is disposed on the opposite side. The first through hole 25H of the support plate 25, the plate hole 41H of the buffer plate 41, the second through hole 26H of the bracket 26, and the grommet hole 27a (second bolt insertion hole) of the buffer grommet 27 are formed. The holding bolt 28 is inserted over and screwed into the nut 29 and tightened.

  Thus, in another embodiment (a), the buffer plate 41 is sandwiched between the support surface 25S of the support plate 25 and the connection surface 26S of the bracket 26, and the buffer grommet 27 is in contact with the outer surface of the bracket 26. The support plate 25 and the bracket 26 are connected. By being connected in this manner, the displacement of the support piece 25b of the support plate 25 and the connection piece 26b of the bracket 26 in the overlapping direction (direction in which the holding bolt 28 is inserted), the support piece 25b and the connection piece 26b, Displacement in a direction along the direction (a direction perpendicular to the insertion direction of the holding bolt 28) is allowed, and support for making the relative positional relationship between the boom 21 and the medicine supply pipe 22 appropriate is realized.

  In the other embodiment (a), the buffer plate 41 (an example of the first buffer member) and the buffer grommet 27 (second buffer member) are used in combination, but the buffer plate 41 alone is used for support. You may comprise so that the plate 25 and the bracket 26 may be connected.

(B) As a modification of another embodiment (a), the buffer grommet 27 (an example of the second buffer member) and the buffer plate 41 (an example of the first buffer member) are integrated with rubber or resin that can be flexibly deformed. It may be formed as a single piece.

  As a specific configuration, a small-diameter portion is formed at a boundary portion between the buffer plate 41 and the buffer grommet 27, and a plate hole portion 41H (first bolt insertion hole) formed in the buffer plate 41, and a buffer grommet. The structure which forms the grommet hole part 27a (2nd bolt insertion hole) formed in 27 in a communication state is considered.

  For example, by inserting the one-piece having such a configuration from the second through-hole 26H, the small-diameter portion of the one-piece is fitted into the second through-hole 26H and arranged in the same manner as shown in FIG. You may do it. With this configuration, the connecting work can be easily performed.

(C) In the embodiment, the support piece 25b of the support plate 25 (support part) is orthogonal to the fixed piece 25a. However, instead of this, for example, an attitude other than the orthogonal attitude is set, for example, 45 degrees. Set to. Similarly, the relative posture between the holding piece 26a and the connecting piece 26b of the bracket 26 can be set to an angle other than the orthogonal angle.

(D) As a support part, the structure which integrally formed the plate-shaped member in the 1st holder 23a is employable. In this configuration, the mounting work by tightening the screws 31 is unnecessary as compared with the configuration using the support plate 25.

  INDUSTRIAL APPLICABILITY The present invention has a configuration in which a nozzle is provided in a supply pipe arranged along the longitudinal direction of the boom, and can be used for a structure that supports the supply pipe and the nozzle on the boom.

21 Boom 22 Drug supply pipe (supply pipe)
22a Through hole 23 Holder 23a First holder 23b Second holder 23L Internal flow path 24 Spray nozzle (nozzle)
25 support plate / support portion 25S support surface 25H first through hole 26 bracket 26S connecting surface 26H second through hole 26T mounting surface 27 buffer grommet (second buffer member)
27a Grommet hole (second bolt insertion hole)
27b Bushing 28 Retaining bolt (bolt)
31 Screw 35 Support 41 Buffer plate (first buffer member)
41H Plate hole (second bolt insertion hole)
S Support mechanism

Claims (8)

A supply pipe arranged along the longitudinal direction of the boom;
A holder in which a part of the fluid supplied to the supply pipe is sent from a through-hole on the outer periphery of the supply pipe by being held on the outer periphery of the supply pipe;
A nozzle that is provided in the holder and sprays the fluid fed to the holder;
The nozzle support structure provided with the support mechanism which supports the bracket supported by the said boom, and the support part formed in the said holder so that relative position displacement is possible. The support portion is configured by a support plate provided in the holder, and a first through hole is formed in the support plate,
A second through hole is formed in the bracket;
The support mechanism includes a first buffer member made of an elastic material having a first bolt insertion hole;
The first buffer member is sandwiched between a support surface of the support plate and a connection surface of the bracket, a bolt is inserted through the first through hole, the first bolt insertion hole, and the second through hole, The nozzle support structure according to claim 1, wherein the support plate and the bracket are connected by fastening a bolt. The support portion is configured by a support plate provided in the holder, and a first through hole is formed in the support plate,
A second through hole is formed in the bracket;
The support mechanism includes a second buffer member made of an elastic material having a second bolt insertion hole;
The support plate is disposed at a position where the support surface of the support plate and the connection surface of the bracket face each other, and the surface of the support plate opposite to the support surface or the bracket of the support plate opposite to the connection surface. The second buffer member is disposed so as to contact the surface, and a bolt inserted through the second bolt insertion hole of the second buffer member is inserted into the first through hole and the second through hole, The nozzle support structure according to claim 1, wherein the support plate and the bracket are connected by fastening a bolt.   A bush capable of inserting the bolt is fitted into the second bolt insertion hole of the second buffer member, and one of the first through hole of the support plate and the second through hole of the bracket has a larger diameter than the other. The nozzle according to claim 3, wherein the second buffer member is disposed in a state where a part of the first through hole and the second through hole is inserted into a large diameter. Support structure. The support portion is configured by a support plate provided in the holder, and a first through hole is formed in the support plate,
A second through hole is formed in the bracket;
The support mechanism includes a first buffer member made of an elastic material having a first bolt insertion hole and a second buffer member made of an elastic material having a second bolt insertion hole;
The first buffer member is sandwiched between a support surface of the support plate and a connection surface of the bracket, and a surface of the support plate opposite to the support surface or a side of the bracket opposite to the connection surface. The second buffer member is disposed so as to contact the surface of
2. The nozzle according to claim 1, wherein the support plate and the bracket are connected by fastening bolts that are inserted into the first through hole, the second through hole, the first bolt insertion hole, and the second bolt insertion hole. Support structure.   The nozzle support structure according to claim 5, wherein the first buffer member and the second buffer member are integrated. A first holder having a semicircular crimping surface so as to embrace the supply pipe; and a semicircular circumference so as to embrace the opposite side of the supply pipe where the first holder embraces. A second holder in which an internal flow path through which a fluid is sent having a shaped crimping surface is formed, and a screw for connecting and fixing the first holder and the second holder,
The nozzle is provided in the second holder in a state communicating with the internal flow path;
The nozzle support structure according to any one of claims 2 to 6, wherein the support plate is fixed to the first holder by the screws.   The bracket has an attachment surface that is supported in contact with an outer wall of the boom or a support provided in the boom, and the attachment surface and the connection surface are formed in a posture orthogonal to each other. Item 8. The nozzle support structure according to any one of Items 2 to 7.

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