JP2018154441A - Joining device and forklift - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joining device capable of preventing leakage of working fluid.SOLUTION: There is provided a joining device comprising a pivotable axial member 42, a support member 43 being provided in a cargo handling device and pivotably supporting both ends of the axial member 42, and joint members 45, 46 provided at an end of the axial member 42, in which the joint members 45, 46 are pivotable relative to the axial member 42 in the same direction as the turning direction of the axial member 42, ends of tubular members 24c, 24d wound around a reel device are connected to the axial member 42 between both support members 43, ends of tubular members 24a, 24b connected to an operating device of the cargo handling device are connected to the joint members 45, 46, and flow paths 61, 62 communicating with the ends of the tubular members 24c, 24d and the ends of the tubular members 24a, 24b are formed in the axial member 42 and joint members 45, 46.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a joining device that joins tubular members that supply a working fluid to an operating device of an industrial vehicle such as a forklift, and a forklift including the joining device.

Conventionally, as this type of joining device, for example, as shown in FIG. 11, a junction block 105 that joins hoses 101 to 104 that supply high-pressure hydraulic oil to a cylinder that adjusts the distance between a pair of left and right fork bodies of a forklift. There is. The junction block 105 includes a fixing member 107 that is supported and guided by a mast of a forklift and is attached to a lift bracket that can freely move up and down, and a shaft member 108 that is rotatably provided on the fixing member 107.
The fixing member 107 has a shaft hole 109 penetrating in the left-right direction, and a shaft member 108 is inserted into the shaft hole 109. First and second hoses 101 and 102 are connected to the shaft member 108, and third and fourth hoses 103 and 104 are connected to the fixing member 107. One hydraulic flow path 110 communicating with the first hose 101 and the third hose 103 and the other hydraulic flow path 111 communicating with the second hose 102 and the fourth hose 104 are respectively connected to the shaft member 108. And the fixing member 107.

  That is, one hydraulic flow path 110 includes one hole 114 formed in the shaft member 108, one groove 115 formed on the entire inner periphery of the fixing member 107, one hole 114 and one One communicating hole 116 communicating with the groove 115 is provided. The end of the first hose 101 communicates with one hole 114, and the end of the third hose 103 communicates with one groove 115.

  Similarly, the other hydraulic flow path 111 has the other hole 118, the other groove 119, and the other communication hole 120.

  A plurality of oil seals 122, 123, 124 are provided on the inner periphery of the fixing member 107.

  The first and second hoses 101 and 102 are wound around a reel device 126, and the reel device 126 is provided on the top of the mast of the forklift. The first and second hoses 101 and 102 wound around the reel device 126 are connected to a hydraulic control circuit built in the vehicle main body of the forklift via connection pipes and the like.

  The third and fourth hoses 103 and 104 are connected to the cylinder.

  According to this, the hydraulic oil is supplied from the hydraulic control circuit of the vehicle body to the cylinder through the first and third hoses 101 and 103 (or the second and fourth hoses 102 and 104), and in the cylinder The hydraulic oil is discharged to the hydraulic control circuit of the vehicle body through the second and fourth hoses 102 and 104 (or the first and third hoses 101 and 103), so that the cylinder is operated and a pair of The distance between the fork bodies is adjusted.

  The pair of fork bodies move up and down along the mast together with the lift bracket. At this time, since the directions of the first and second hoses 101 and 102 with respect to the lift bracket change according to the lifting and lowering of the lift bracket, the shaft member 108 rotates around the shaft center following the change in the direction. To do. Thereby, it can prevent that the front-end | tip part of the 1st and 2nd hose 101,102 is bent forcibly.

  When the lift bracket is raised, the distance between the lift bracket and the reel device 126 is shortened, so that the first and second hoses 101 and 102 tend to be loosened. Is wound around the reel device 126, so that the slack of the first and second hoses 101 and 102 is prevented.

  Further, when the lift bracket is lowered, the vertical distance between the lift bracket and the reel device 126 is extended, so that the first and second hoses 101 and 102 are pulled out from the reel device 126.

  In addition, the junction block (joining apparatus) of the above hoses is described in the following patent documents 1-3, for example.

JP 47-15856 JP-A-5-254798 Shokai 58-4594

  However, in the above conventional type, since the first and second hoses 101 and 102 are wound around the reel device 126, a tensile force acts on the first and second hoses 101 and 102, and this tensile force. As a result, a radial external force F acts on the shaft member 108 of the junction block 105. In particular, when the first and second hoses 101 and 102 are pulled out from the reel device 126 as the lift bracket moves up and down, the tensile force increases and the external force F also increases. Since the external force F acting on the shaft member 108 is received by the fixing member 107 in this manner, when a large external force F acts on the shaft member 108, at least the outer peripheral surface of the shaft member 108 and the inner peripheral surface of the fixing member 107 are at least. Either of them is deformed, and the hydraulic oil cannot be completely sealed by the oil seals 122, 123, and 124, and the hydraulic oil passes through the gap between the shaft member 108 and the fixed member 107 from the hydraulic flow paths 110 and 111. There is a problem of leakage to the outside of the junction block 105.

  An object of this invention is to provide the joining apparatus and forklift which can prevent the leakage of a working fluid.

In order to achieve the above object, according to the first aspect of the present invention, a lifting / lowering cargo handling device including an actuation device that operates by fluid pressure and a tubular member connected to the actuation device are wound up in accordance with the elevation of the cargo handling device. An apparatus for joining tubular members provided in a cargo handling device for an industrial vehicle having a reel device,
A rotatable shaft member;
A support member provided in the cargo handling device and rotatably supporting both ends of the shaft member;
A joint member provided at an end of the shaft member;
The joint member is rotatable with respect to the shaft member in the same direction as the rotation direction of the shaft member,
The end of the tubular member wound around the reel device is connected to the shaft member between the two support members,
The end of the tubular member connected to the actuating device of the cargo handling device is connected to the joint member,
A flow path communicating with the end of the tubular member connected to the shaft member and the end of the tubular member connected to the joint member is formed in the shaft member and the joint member.

  According to this, since the end of the tubular member wound around the reel device is connected to the shaft member between the two support members, a tensile force acts on the tubular member wound around the reel device, and this tensile force Thus, even if a radial external force acts on the shaft member, the external force is received by both support members. Thereby, the connection part of a shaft member and a joint member does not deform | transform by the said external force, and it can prevent that a working fluid leaks outside from the connection part of a shaft member and a joint member.

  Further, even if the direction of the tubular member connected to the shaft member changes according to the lifting and lowering of the cargo handling device, the shaft member rotates following the change in the direction, so the tubular connected to the shaft member It can prevent that the front-end | tip part of a member bends forcibly.

  Further, since the joint member is rotatable in the same direction as the rotation direction of the shaft member with respect to the shaft member, even if the shaft member rotates, the joint member does not rotate integrally with the shaft member. . Therefore, it is possible to prevent the distal end portion of the tubular member connected to the joint member from being bent forcibly.

In the joining device according to the second invention, the joint member is a swivel joint,
The swivel joint is provided at both ends of the shaft member and is rotatable around the same axis as the rotation axis of the shaft member.

  The joining device according to the third aspect of the invention is provided with a slip prevention means for preventing the shaft member from shifting in the axial direction with respect to the support member.

  According to this, it is possible to prevent the shaft member from being displaced in the axial direction and falling off from the support member.

  In the joining device according to the fourth aspect of the present invention, an injection means for injecting a rust inhibitor between the shaft member and the support member is provided on the support member.

  According to this, it can prevent that rust generate | occur | produces between a shaft member and a supporting member, and rotation of a shaft member will be inhibited.

  In the joining device according to the fifth aspect of the invention, the operating device is a cylinder, the cargo handling device is a fork device, the tubular member has a hose, and the industrial vehicle is a forklift.

The sixth invention is a forklift provided with the joining device according to the fifth invention,
A mast is provided on the vehicle body,
The fork device includes an elevating member guided by the mast so as to be movable up and down, a pair of fork main bodies provided on the elevating member, and a cylinder for adjusting a distance between the pair of fork main bodies,
The reel device is provided on the mast,
The joining device is provided on the elevating member.

The seventh aspect of the present invention is a joining device for a tubular member of an industrial vehicle having an actuating device that operates with fluid pressure and a tubular member that is connected to the actuating device and takes in and out the working fluid
A rotatable shaft member;
A support member provided in an industrial vehicle and rotatably supporting both ends of the shaft member;
A joint member provided at an end of the shaft member;
The joint member is rotatable with respect to the shaft member in the same direction as the rotation direction of the shaft member,
A flow path communicating with the end of the tubular member connected to the shaft member and the end of the tubular member connected to the joint member is formed in the shaft member and the joint member.

  According to this, a tensile force acts on the tubular member connected to the shaft member, and even if a radial external force acts on the shaft member due to this tensile force, the external force is received by both support members. Thereby, the connection part of a shaft member and a joint member does not deform | transform by the said external force, and it can prevent that a working fluid leaks outside from the connection part of a shaft member and a joint member.

  Even if the orientation of the tubular member connected to the shaft member changes, the shaft member rotates following the change in the orientation, so that the distal end of the tubular member connected to the shaft member is bent flexibly. Can be prevented.

  Further, since the joint member is rotatable in the same direction as the rotation direction of the shaft member with respect to the shaft member, even if the shaft member rotates, the joint member does not rotate integrally with the shaft member. . Therefore, it is possible to prevent the distal end portion of the tubular member connected to the joint member from being bent forcibly.

  As described above, according to the present invention, a tensile force acts on the tubular member, and even if a radial external force acts on the shaft member due to this tensile force, the external force is received by both support members. The connecting portion with the member is not deformed by the external force, and the working fluid can be prevented from leaking outside from the connecting portion between the shaft member and the joint member.

It is a side view of a forklift in an embodiment of the invention. FIG. 4 is a side view of the front portion of the forklift, showing a state where the forklift device is lowered. FIG. 3 is an XX arrow view in FIG. 2. FIG. 6 is a side view of the front portion of the forklift, showing a state in which the forklift device is raised. It is a XX arrow line view in FIG. It is a partially cutaway front view of the junction block provided in the forklift. It is a XX arrow line view in Drawing 6, and shows the state where a forklift device lowered. FIG. 4 is a side view of the junction block, showing a state where the forklift device is raised. FIG. 2 is an exploded view of the junction block. It is a figure of the support member of a junction block equally. It is a figure of the junction block provided in the conventional forklift.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 to 3, reference numeral 1 denotes a forklift which is an example of an industrial vehicle, and includes a vehicle main body 2, wheels 3 provided on the vehicle main body 2, and a mast provided at the front of the vehicle main body 2. 4 and a fork device 5 (an example of a cargo handling device) that is supported and guided by the mast 4 and that can freely move up and down.

  The mast 4 has an outer mast 7 and an inner mast 9 that is lifted and lowered by a lift cylinder 8. The fork device 5 includes a lifting member 10 that is guided by the mast 4 so as to freely move up and down, a pair of left and right fork bodies 13 and 14 provided on the lifting member 10, and a distance adjustment that adjusts a distance between the pair of fork bodies 13 and 14. A device 15 and a side shift device 16 are included.

  The elevating member 10 includes a carriage 11 that is guided by the inner mast 9 so as to be movable up and down, and a lift frame 12 provided on the carriage 11. The lift frame 12 is held slidable in the left-right direction A (vehicle width direction) with respect to the carriage 11.

  The lift frame 12 has a finger bar 17, and both fork bodies 13 and 14 are supported and guided by the finger bar 17, and are movable in the left-right direction A. The distance adjusting device 15 includes one distance adjusting cylinder 19 that moves one fork main body 13 (an example of an operating device) and the other distance adjusting cylinder 20 that moves the other fork main body 14 (an example of an operating device). And have. These interval adjusting cylinders 19 and 20 are hydraulic (an example of fluid pressure) and are provided on the lift frame 12. The piston rod 19 a of one spacing adjustment cylinder 19 is connected to one fork main body 13, and the piston rod 20 a of the other spacing adjustment cylinder 20 is connected to the other fork main body 14.

 The side shift device 16 horizontally moves the lift frame 12 in the left-right direction A, and includes a hydraulic side shift cylinder 22.

  The side shift cylinder 22 is provided on the carriage 11, and the piston rod 22 a of the side shift cylinder 22 is connected to the lift frame 12.

  As shown in FIG. 1, a pair of left and right sheaves 65 are supported on the upper portion of the inner mast 9, and an elevating chain 66 having a base end fixed to the bottom of the outer mast 7 is wound around the sheave 65. It is connected to the carriage 11. Thus, by raising the inner mast 9 by the lift cylinder 8, the sheave 65 rises and the carriage 11 rises at double speed.

  The vehicle body 2 incorporates a hydraulic pressure control circuit 67 that controls the one and the other distance adjusting cylinders 19 and 20 and the side shift cylinder 22.

  At the upper part of the outer mast 7, a first reel device 25 that winds the first tubular member 24 connected to one spacing adjusting cylinder 19 in accordance with the raising and lowering of the fork device 5, and the other spacing adjusting cylinder. A second reel device 28 that winds up the second tubular member 27 connected to the cylinder 20 as the fork device 5 moves up and down, and a third tubular member 30 connected to the side shift cylinder 22 are forked. A third reel device 31 is provided that winds up as the device 5 moves up and down.

  The first tubular member 24 is used to put hydraulic oil (an example of a working fluid) into and out of one interval adjusting cylinder 19, and has two pipes 24 a and 24 b connected to the one interval adjusting cylinder 19. And two flexible hoses 24c and 24d made of rubber or the like wound around the first reel device 25. The pipes 24a and 24b and the hoses 24c and 24d are joined via a first junction block 33 (an example of a joining device).

  Similar to the first tubular member 24, the second tubular member 27 is used to put hydraulic oil into and out of the other distance adjusting cylinder 20, and includes two pipes 27a and 27b and two hoses 27c and 27d. These pipes 27a, 27b and hoses 27c, 27d are joined via a second junction block 34 (an example of a joining device).

  In addition, the third tubular member 30 is for putting hydraulic oil into and out of the side shift cylinder 22, and has two pipes 30a and 30b and two hoses 30c and 30d, and these pipes 30a. , 30b and the hoses 30c, 30d are joined via a third junction block 35 (an example of a joining device).

The hoses 24c, 24d, 27c, 27d, 30c, and 30d wound around the first to third reel devices 25, 28, and 31 are connected to the reel devices 25, 28, and 31 through a plurality of connection pipes 38. The hydraulic control circuit 67 of the vehicle body 2 is connected.
As shown in FIGS. 6 to 8, the first junction block 33 supports a shaft member 42 that can rotate about an axis 41 in the left-right direction A, and both ends of the shaft member 42 so as to be rotatable. A pair of left and right support members 43 and joint members 45 and 46 provided at both ends of the shaft member 42 are provided.

  As shown in FIGS. 9 and 10, the support member 43 has a through hole 48 and a pair of upper and lower legs 49, and is attached to the lift frame 12 of the elevating member 10 by a plurality of bolts 50. .

  Both end portions of the shaft member 42 are inserted into the through holes 48 of the support member 43, respectively. A pair of snap rings 52 (an example of a slip prevention means) that prevent the shaft member 42 from shifting in the axial direction with respect to the support member 43 are fitted on the outer periphery of both ends of the shaft member 42.

  A groove 51 is formed on the inner peripheral surface of the support member 43, that is, the peripheral surface of the through hole 48 over the entire periphery. An injection means 54 for injecting grease 53 (an example of a rust preventive agent) is provided on the support member 43 between the outer periphery of the shaft member 42 and the inner periphery of the support member 43. The injection means 54 has an injection hole 55 that opens to the outside of the support member 43 and the groove 51, and a grease nipple 56 that is screwed into the injection hole 55.

  Each of the joint members 45 and 46 is an elbow-type swivel joint, and is rotatable about the same axis as the rotation axis 41 of the shaft member 42 with respect to the shaft member 42.

  The ends of the hoses 24 c and 24 d wound around the first reel device 25 are connected to the shaft member 42 via the joint 58 between the both support members 43.

  The end of one pipe 24 a connected to one spacing adjusting cylinder 19 is connected to one joint member 45, and the end of the other pipe 24 b is connected to the other joint member 46.

  One flow path 61 communicating with the end of one pipe 24 a and the end of one hose 24 c is formed in the shaft member 42 and one joint member 45. One flow path 61 has a hole 61 a formed in the shaft member 42 and a hole 61 b formed in one joint member 45.

  In addition, the other flow path 62 communicating with the end of the other pipe 24 b and the end of the other hose 24 d is formed in the shaft member 42 and the other joint member 46. The other flow path 62 has a hole 62 a formed in the shaft member 42 and a hole 62 b formed in the other joint member 46.

  The second and third junction blocks 34 and 35 have the same structure as the first junction block 33.

  Hereinafter, the operation of the above configuration will be described.

  As shown in FIGS. 2 and 3, the hydraulic oil is supplied from the hydraulic control circuit 67 of the vehicle body 2 to one pipe 24 a of the first tubular member 24, the hose 24 c, and one flow path 61 of the first junction block 33. And is supplied to one of the distance adjusting cylinders 19, and the hydraulic oil in one of the distance adjusting cylinders 19 passes through the other pipe 24 b, the hose 24 d, and the other flow path 62 of the first junction block 33. By flowing back to the hydraulic pressure control circuit 67, the piston rod 19a of one of the distance adjusting cylinders 19 is shortened.

Further, the hydraulic oil flows from the hydraulic control circuit 67 through the one pipe 27 a of the second tubular member 27, the hose 27 c, and the one flow path 61 of the one flow path 61 of the second junction block 34. While being supplied to the adjusting cylinder 20, the hydraulic oil in the other interval adjusting cylinder 20 is supplied to the other piping 27b, the hose 27d, and the second junction block 34.
The piston rod 20a of the other distance adjusting cylinder 20 is shortened by flowing through the other flow path 62 and returning to the hydraulic control circuit 67.

  Thereby, the space | interval between both the fork main bodies 13 and 14 is reduced.

  The hydraulic fluid flows from the hydraulic control circuit 67 through the other pipe 24 b of the first tubular member 24, the hose 24 d, and the other flow path 62 of the first junction block 33, and is supplied to one interval adjusting cylinder 19. At the same time, the hydraulic oil in one interval adjusting cylinder 19 flows through one pipe 24a, the hose 24c, and one flow path 61 of the first junction block 33 and is returned to the hydraulic control circuit 67. The piston rod 19a of the distance adjusting cylinder 19 extends.

  In addition, hydraulic fluid flows from the hydraulic control circuit 67 through the other pipe 27 b of the second tubular member 27, the hose 27 d, and the other flow path 62 of the second junction block 34, and is supplied to the other distance adjusting cylinder 20. In addition, the hydraulic oil in the other distance adjusting cylinder 20 flows through one pipe 27a, the hose 27c, and one flow path 61 of the second junction block 34, and is returned to the hydraulic control circuit 67. The piston rod 20a of the other distance adjusting cylinder 20 extends.

  Thereby, the space | interval between both the fork main bodies 13 and 14 is expanded. In this manner, the distance between the fork bodies 13 and 14 can be adjusted.

  Further, the hydraulic oil flows from the hydraulic control circuit 67 through the one pipe 30 a of the third tubular member 30, the hose 30 c, and the one flow path 61 of the third junction block 35, and is supplied to the side shift cylinder 22. At the same time, the hydraulic oil in the side shift cylinder 22 flows through the other pipe 30b, the hose 30d, and the other flow path 62 of the third junction block 35, and is returned to the hydraulic control circuit 67. The 22 piston rods 22a are shortened. Thereby, since the lift frame 12 moves to either the left or right, both the fork main bodies 13 and 14 move to the left or right.

  In addition, hydraulic fluid flows from the hydraulic control circuit 67 through the other pipe 30 b of the third tubular member 30, the hose 30 d, and the other flow path 62 of the third junction block 35, and is supplied to the side shift cylinder 22. At the same time, the hydraulic oil in the side shift cylinder 22 flows through the one pipe 30a, the hose 30c, and the one flow path 61 of the third junction block 35 and is returned to the hydraulic control circuit 67. 22 piston rods 22a extend. Thereby, since the lift frame 12 moves to either the left or right, both the fork bodies 13 and 14 both move to the other left and right. Thereby, the position of both fork main bodies 13 and 14 can be changed into right and left.

  As shown in FIGS. 2, 3, and 6 to 8, in the first junction block 33, both hoses 24 c and 24 d of the first tubular member 24 wound around the first reel device 25. Is connected to the shaft member 42 via the joint 58 between the both support members 43, so that the tensile force T acts on both the hoses 24c and 24d wound around the first reel device 25. Even if a radial external force F acts on the shaft member 42 by the tensile force T, the external force F is received by the two support members 43. As a result, the connecting portion between the shaft member 42 and the joint members 45 and 46 is not deformed by the external force F, and hydraulic fluid is prevented from leaking from the connecting portion between the shaft member 42 and the joint members 45 and 46 to the outside. can do.

  Further, as shown in FIGS. 2, 4, 7, and 8, even if the directions of both the hoses 24c and 24d of the first tubular member 24 change as the fork device 5 moves up and down, Following the change, the shaft member 42 rotates about the rotation axis 41, so that it is possible to prevent the distal ends of both the hoses 24c and 24d connected to the shaft member 42 from being bent forcibly. .

  Further, since the joint members 45 and 46 are rotatable about the coaxial axis 41 of the shaft member 42 with respect to the shaft member 42, respectively, as shown in FIGS. Even if the shaft member 42 rotates following the change in the direction of 24c, 24d, the joint members 45, 46 do not rotate integrally with the shaft member 42. Therefore, it is possible to prevent the distal ends of the pipes 24a and 24b connected to the joint members 45 and 46 from being bent forcibly.

  Further, as shown in FIG. 6, since both support members 43 are sandwiched between both snap rings 52, it is possible to prevent the shaft member 42 from being displaced in the axial direction and falling off from the support member 43.

  Moreover, since grease 53 is supplied between the outer periphery of the shaft member 42 and the inner periphery of the support member 43 by injecting the grease 53 into the groove 51 from the grease nipple 56 using a grease gun or the like, the shaft member 42 It can prevent that rust generate | occur | produces between the support members 43 and the rotation of the shaft member 42 is inhibited.

  The above is the operation and effect of the first junction block 33, but the second and third junction blocks 34 and 35 also have the same operation and effect.

  In the said embodiment, as shown in FIGS. 1-3, although the 1st-3rd junction blocks 33-35 are provided in the forklift 1 which is an example of an industrial vehicle, it is limited to the forklift 1 Instead, it may be provided, for example, in an excavator loader or a wheel loader. Further, although three junction blocks 33 to 35 are provided, one or a plurality other than three may be provided.

  In the above embodiment, the hydraulic drive type distance adjusting cylinders 19 and 20 and the side shift cylinder 22 are used, but an air drive type may be used.

1 Forklift (industrial vehicle)
2 Vehicle body 4 Mast 5 Fork device (handling device)
10 Lifting members 13, 14 Fork main body 19, 20 Spacing adjustment cylinder (actuator)
22 Side shift cylinder (actuator)
24, 27, 30 Tubular members 24c, 24d, 27c, 27d, 30c, 30d Hose 25, 28, 31 Reel devices 33, 34, 35 Junction block (joining device)
41 Rotating shaft center 42 Shaft member 43 Support members 45 and 46 Joint member 52 Snap ring (deviation prevention means)
53 Grease (rust inhibitor)
54 Injection means 61, 62 Flow path

Claims (7)

Provided in an industrial vehicle loading / unloading apparatus having a lifting / lowering cargo handling device having an actuation device that operates by fluid pressure and a reel device that winds a tubular member connected to the actuation device according to the lifting / lowering of the cargo handling device. A joining device for tubular members,
A rotatable shaft member;
A support member provided in the cargo handling device and rotatably supporting both ends of the shaft member;
A joint member provided at an end of the shaft member;
The joint member is rotatable with respect to the shaft member in the same direction as the rotation direction of the shaft member,
The end of the tubular member wound around the reel device is connected to the shaft member between the two support members,
The end of the tubular member connected to the actuating device of the cargo handling device is connected to the joint member,
A joining apparatus comprising: a shaft member and a joint member having a flow path communicating with an end portion of the tubular member connected to the shaft member and an end portion of the tubular member connected to the joint member. The joint member is a swivel joint,
2. The joining apparatus according to claim 1, wherein the swivel joint is provided at both ends of the shaft member and is rotatable about the same axis as the rotation axis of the shaft member. The joining apparatus according to claim 1 or 2, further comprising a slip prevention means for preventing the shaft member from shifting in the axial direction with respect to the support member. The joining apparatus according to any one of claims 1 to 3, wherein an injection means for injecting a rust preventive agent between the shaft member and the support member is provided on the support member. The actuating device is a cylinder, the cargo handling device is a fork device, the tubular member has a hose, and the industrial vehicle is a forklift, according to any one of claims 1 to 4. Joining device. A forklift comprising the joining device according to claim 5,
A mast is provided on the vehicle body,
The fork device includes an elevating member guided by the mast so as to be movable up and down, a pair of fork main bodies provided on the elevating member, and a cylinder for adjusting a distance between the pair of fork main bodies,
The reel device is provided on the mast,
A forklift characterized in that the joining device is provided on a lifting member. An apparatus for joining tubular members of an industrial vehicle, comprising: an actuating device that operates by fluid pressure; and a tubular member that is connected to the actuating device and takes in and out the working fluid,
A rotatable shaft member;
A support member provided in an industrial vehicle and rotatably supporting both ends of the shaft member;
A joint member provided at an end of the shaft member;
The joint member is rotatable with respect to the shaft member in the same direction as the rotation direction of the shaft member,
A joining apparatus comprising: a shaft member and a joint member having a flow path communicating with an end portion of a tubular member connected to the shaft member and an end portion of the tubular member connected to the joint member.

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