JPH02128605A - Structure for connecting hose - Google Patents

Abstract

PURPOSE:To prevent misconnection of hoses even without performing classification by color by binding plural hoses of an equal length in a state thereof mutually shifted through a prescribed distance in the longitudinal direction and similarly installing plural hose connecting tubes of respective apparatuses shifted through the prescribed distance. CONSTITUTION:Hoses of an equal length 87, 87... are bound in a state mutually shifted through a prescribed distance (L) and hose connecting tubes 891, 892... of the first apparatus 31 are installed by mutually shifting through the prescribed distance (L). The tips of hose connecting tubes 901, 902... of the second apparatus 26 are simultaneously installed by mutually shifting through the prescribed distance (L). One end of each hose is respectively connected to the mutual adjacent hose connecting tube.

Description

Detailed Description of the Invention A6 Objective of the Invention (1) Industrial Application Field The present invention provides a method for connecting a plurality of hose connection pipes attached to a first device and a plurality of hose connection pipes attached to a second device. This invention relates to a hose connection structure in which multiple hoses are used to connect two systems of the same system.

(2) Conventional technology Conventionally, when connecting a plurality of hose connection pipes of a first device and a plurality of hose connection pipes of a second device using a plurality of hoses in the same system, in order to prevent incorrect connections, , connecting pipes and hoses are color coded by system: J't'.

(3) Problems to be Solved by the Invention In the above-mentioned means for preventing incorrect connection of hoses, color separation is not only troublesome to work with, but also has the risk of causing mistakes in the work, and also takes a long time. The color may fade over a period of time, causing problems with subsequent maintenance.

The present invention has been made in view of the situation in which hoses are connected in different colors, and it is an object of the present invention to provide a simple and effective hose connection structure that can always prevent erroneous connections of hoses without color-coding by system. purpose.

B0 Structure of the Invention (1) Means for Solving the Problems In order to achieve the above object, the present invention provides a method in which a plurality of hoses are formed to have equal lengths, and these hoses are shifted from each other by a certain distance in the longitudinal direction. and shift the tip positions of the plurality of hose connection tubes of the first device to one end of the plurality of hoses, and the tip positions of the plurality of hose connection tubes of the second device to correspond to the other ends of the plurality of hoses. It is characterized by having been set as follows.

(2) Effect When connecting the plurality of hose connection pipes of the first device and the plurality of hose connection pipes of the second device using a plurality of hoses,
A plurality of bundled hoses are arranged between the first and second devices, and one end of these hoses is connected to a plurality of hose connection pipes of one device on the same earth floor adjacent to each other, and the other end of these hoses is and a plurality of hose connection pipes of the other device are connected on the same earthen floor in close proximity to each other, and by doing so, the hose connection pipes of the same system can be connected accurately.

(3) Embodiment Hereinafter, one embodiment of the present invention will be explained with reference to the drawings.

First, in FIG. 1, an engine 3 is mounted on the front part of a body frame 2 of a riding type tractor 1, and a pair of left and right front wheels 4 are suspended so as to be steerable. Further, a transmission unit 1-5 is attached to the rear end of the vehicle body frame 2, and a pair of left and right rear wheels 6 are suspended below the transmission unit 5 so as to be steerable. Further, a worker seat 7 is arranged above the transmission unit 5, and the front end of the seat 7 is supported via a pivot 9 by a placenta 8 fixed to the upper surface of the transmission unit 5, and the seat 7 is placed in the normal use position (solid line). It can be rotated between the forward-tilted maintenance position (the position shown by the chain line) and the forward-tilted maintenance position (the position shown by the chain line).

A handle column 10 is erected on the vehicle body frame 2'' at an intermediate position between the seat 7 and the engine 3, and a handle wheel 11 for steering the front and rear wheels 4.6 is pivotally supported on this.

The transmission unit 5 includes a clutch, a transmission, a rear differential, and a front wheel drive shaft so that it can receive power from the engine 3 and drive not only the rear wheels 6 but also the front wheels 4.

At the front end of the vehicle body frame 2, an elevating arm 13 having a hitch box 12 for connecting a working machine at the front end is pivotally supported so as to be able to swing up and down. This W arm 13 has a car body frame 2
The piston 15 of the single-acting front lift cylinder 14 installed at ``-'' is connected via a link mechanism 16, and the hydraulic drive of the piston 15 causes the lifting arm 13 to rise, and the release of the hydraulic pressure causes the lifting arm 13 to rise. It is designed to lower its own weight.

As shown in FIGS. 1 and 2, a rear lift cylinder 17 is installed on the transmission unit 5 directly below the seat 7, and a working machine 18 such as a rotary tiller is raised and lowered by this rear lift cylinder 17. is connected to the rear end of the transmission unit 5 via a link mechanism 19.

The link mechanism 19 includes a single wooden trunk link 20 that is pivotally supported to the transmission unit 5 so as to be able to swing vertically, and a pair of left and right links that are pivotably supported to the transmission unit 5 below the top link 20 so as to be pivotable vertically. Lower links 21 and 21 are provided to allow the working machine 18 to move up and down with respect to the tractor 1 and to tilt left and right. Further, the link mechanism 19 includes a pair of left and right lift arms 22, 22, and these lift arms 2.
-F
The foot arms 22, 22 shown are the rear lift cylinders 17.
It is fixed to an elevating drive shaft 25 that is linked to a piston 24.

Thus, the lift arm 2 is hydraulically driven by the piston 24.
According to the upward swing of 2, the working machine 18 can be raised via the link mechanism 19, and when the hydraulic pressure is released, the working machine 18 can be lowered by its own weight.

One of the pair of lift rods 23, 23, the right lift rod 23' in the illustrated example, is partially configured with a double-acting telescoping cylinder 26 to be extendable and retractable, and the operation of the telescoping cylinder 26 This allows the work implement 18 to be tilted left and right with respect to the tractor 1 and maintained in a horizontal state.

Hydraulic control device 2 for controlling the supply of pressure oil to the three cylinders 14, 17, 26 and the external hydraulic loader 27
A mark is provided on one side of the rear lift cylinder 17, in the illustrated example, on the right side.

As shown in FIG. 3, this hydraulic control device 28
A substantially cubic distribution block 2 is removably connected to the right side of the rear lift cylinder 17 with bolts directly below the rear lift cylinder 17.
9, a front-rear switching block 30 detachably joined to the rear surface R of the distribution block 29 with bolts, a horizontal control block 31 detachably attached to the front surface F of the two distribution blocks, and an outer surface of the distribution block 29. It is comprised of an ascending control valve 32 and a descending control valve 33 that are detachably attached to S, and a hydraulic pressure extraction block 34 that is detachably joined to the "-" face T of the distribution block 29 with a bolt.

As shown in FIG. 4, the distribution block 29 includes a main relief valve 35, a diverter valve 36, an unload valve 37, and a one-way valve 38.
and three lowering valves. Oil from an oil reservoir 57 is pumped into an oil passage 40 connected to the inlet of the main relief valve 35 by a hydraulic pump 56. The hydraulic pump 56 is connected to the transmission unit l-
The oil reservoir 57 is formed by the bottom wall of the transmission unit 5 and is driven by a clutch input member therein.

Pressure oil sent from the hydraulic pump 56 and regulated by the main relief valve 35 flows into the inlet 36a of the diversion valve 36 via the oil passage 40, the oil pressure take-off block 34, and the oil passage 41. Then, the diversion valve 36 allows a constant flow of pressure oil to flow out from the first outlet 36b and the remaining pressure oil from the second outlet 36c, and the pressure oil from the first outlet 36b passes through the oil path 42. Pressure oil from the horizontal control block 31 and the second outlet 36c is sent to each port 37a, 38a of the unload valve 37 and one-way valve 38 via an oil path 43.

The one-way valve 38 opens only when the pressure at its population 38a becomes higher than that at its outlet 38b, and its outlet 38b is connected to the inlet 39a of the descending valve 39, and is also connected to the front-rear switching block 30 via an oil passage 44. Communicate.

The descending valve 39 has a valve body 58 that opens and closes between the valve body 39a and the outlet 39b, and five back pressure chambers into which hydraulic pressure for pressing the valve body 58 toward the closing side can be introduced. communicates with the above-mentioned port 39a via an orifice 60 provided in the valve body 58. Further, the ratio 039b is opened to the oil sump 57, and the control oil passages 48 extending from the five back pressure chambers communicate with the oil sump 57 via the lowering control valve 33.

The unloading valve 37 has a population 37a, a protrusion 3b, and a back pressure chamber 62 into which hydraulic pressure for pressing toward the closing side can be introduced.
3 communicates with the population 37a. Also, the above exit 3
7b is open to the oil sump 57, and the control oil passage 49 extending from the back pressure chamber 62 communicates with the oil sump 57 via the rise control valve 32.

The lift control valve 32 is constituted by a normally open solenoid valve,
Further, the 'F lowering control valve 33 is constituted by a normally closed solenoid valve.

When the lift control valve 32 is closed while the drop control valve 33 is closed in order to give the front lift cylinder 14 or the rear lift cylinder 17 a lift operation, the unload valve 3 is closed.
In step 7, the pressure oil coming out of the second outlet 36c of the diverter valve 36 passes through the orifice 63 and is held in the back pressure chamber 62, so the valve body 61 receives the oil pressure and closes the inlet 37a. Further, in the descending valve 39 as well, the pressure oil that has passed through the one-way valve 38 passes through the orifice 60 and is held in the back pressure chamber 59, so that the valve body 58 receives the oil pressure and closes the outlet 39b. As a result, the pressure oil that has passed through the one-way valve 38 is sent to the front lift cylinder 14 or the rear lift cylinder 17 via the oil passage 44 and the front/rear switching block 30, and is given an upward movement thereto.

Further, in order to give a downward movement to the front lift cylinder 14 or the rear lift cylinder 17, when the downward control valve 33 is opened while the upward control valve 32 is open, the back pressure chamber 6259 of the unload valve 37 and downward valve 39 is opened. is opened to the oil sump 57 via the ascending control valve 32 and descending control valve 33, respectively, so the valve bodies 61 and 58 of the unloading valve 37 and descending valve 39 are opened by the pressure of the respective inlets 37a and 39a, and the diversion valve The pressure oil that comes out of the second outlet 36c of 36 is transferred to the unload valve 3.
7, that is, refluxes to the oil sump 57 from its outlet 37b. Further, the oil that was first sent to the front lift cylinder 14 or the rear lift cylinder 17 passes through the lowering valve 39 via the front/rear switching block 30, that is, returns to the oil sump 57 from its outlet 39b. As a result, the front lift cylinder 14
Alternatively, the rear lift cylinder 17 performs a downward movement due to the weight of its load side.

The front and rear switching block 30 includes first and second poppet valves 6.
4. ．． 64□, a camshaft 65 for opening and closing these poppet valves 64° and 64□, a gradual lowering valve 66, and an overload relief valve 67 are provided.

First and second poppet valves 64. ．． 64□ are all normally closed type, and the camshaft 65 rotates reciprocatingly at a predetermined angle to open these poppet valves 64. ．． A pair of cams 65a and 65b are provided with different phases to open and close 642 alternately. This camshaft 65 is rotated by a switching lever 686 fixed to one end thereof.

First and second poppet valves 64. ．． The 64□ inlets communicate with each other and with the oil passage 44. Also the first
The outlet [1 of the poppet valve 641 is connected to the hydraulic chamber 70 of the rear lift cylinder 17 via the oil passage 45 in the distribution link 29 and the oil passage 110 passing through the wall of the rear lift cylinder 17, and the second poppet valve 642 The outlet of the slow descending valve 6
6 is communicated with the inlet 66a of No.6.

Then, the camshaft 65 is rotated in one direction to open the first poppet valve 64. When only the rear lift cylinder 17 is opened, only the rear lift cylinder 17 is communicated with the oil passage 44 of the distribution block 29, and the lift control valve 32 is opened.
By controlling the lowering control valve 33 as described above, the vertical movement becomes possible. Also, the camshaft 65 is rotated in the other direction and the second
If only the bottom 1-valve 64□ is opened, the rear lift cylinder 17 is communicated with the oil passage 44, and the lift control valve 32 and the drop control valve 33 are controlled to enable the lift cylinder to move up and down.

The slow-down valve 66 includes a check valve 71 that allows oil to flow from the inlet 66a to the outlet 66b but prevents oil from flowing in the opposite direction, and an adjustment bolt 72 that adjusts the minimum opening degree of the check valve 71. The outlet 66b is connected to the front lift cylinder 14 via an oil passage 47 and a hydraulic hose 111 (see FIG. 1) extending from the front/rear switching block 30.
It is connected to the hydraulic chamber 69 of.

Therefore, when the pressure oil that has passed through the second poppet valve 642 flows into the inlet 66a of the slow-down valve 66, the check valve 71
opens wide, the pressure oil quickly passes through the slow descent valve 66 and is supplied to the hydraulic chamber 69 of the front lift cylinder 14.
Give it a rising motion at a relatively fast speed. On the contrary, during the descending operation, the oil discharged from the hydraulic chamber 69 flows backward from the outlet 66b of the gradual descending valve 66 to the inlet 66a.
Check valve 71! It is held at the minimum opening degree by the I1 section bolt 72 and regulates the oil discharge speed. As a result, the front lift cylinder 14 performs a slow downward movement.

The overload relief valve 67 has its inlet connected to the outlet 6 of the slow descent valve 66.
6b and the front lift cylinder 14, and when the pressure in this oil path 47 increases excessively, the valve is opened and the excess pressure is released to the oil sump 57. It has become. Therefore, the front lift cylinder 14
Therefore, even if the elevated working machine receives an overload due to, for example, a collision with another object, the load can be alleviated.

As mentioned above, the front/rear switching block 30 includes the first and second poppet valves 64. ．． 64□, the camshaft 65, the slow descent valve 66, and the overload release valve 67 are provided collectively, so inspection and maintenance thereof can be easily performed by removing the front/rear switching block 30 from the distribution block 29. At this time, since only relatively small diameter oil passages are opened at the separation surfaces of the distribution block 29 and the front/rear switching block 30, there is extremely little risk of intrusion of dust and the like. In addition, since a slow descent valve 66 and an overload release valve 67 are provided in the front/rear switching block 30,
The front lift cylinder 14 has a cylindrical structure, and the front lift cylinder 14 is equipped with one hydraulic hose 11.
It is sufficient to connect 1, and the piping structure is also simplified.

In FIG. 5, the cylinder head 73 of the rear lift cylinder 17 is provided with a gradual lowering valve 74 and an overload relief valve 75. The slow lowering valve 74 is used to slowly lower the rear lift cylinder 17, and the overload relief valve 75 is used when an overload is applied to the rear lift cylinder 17 and the pressure in its hydraulic chamber 70 increases excessively. At this time, the excess pressure is released to the oil sump 57. Their structures are basically the same as those of the slow-down valve 6G and overload relief valve 67, so a description of these structures will be omitted.

Referring again to FIG. 4, the horizontal control block 31 includes a switching valve 76, a first . Second solenoid valve 77, . 77°, 1st. It includes second orifices 7B, 7B□ and a relief valve 79.

The switching valve 76 consists of a spool 80, a return spring 81 that urges the spool 80 to a neutral position, and a housing 82 that houses them.The housing 82 has an inlet 83 in the center and a pair of outlets on both sides. 84. ．． 84□, and a pair of relief holes 85. on both sides of it. , 85□, and a pair of pressure receiving chambers 86. on both sides thereof. ．． It has 86□. The inlet 83 communicates with the oil passage 42 of the distribution block 29 via the oil passage 51, and the outlet 84. ．． 84□ are respectively connected to the upper and lower oil chambers 26a and 26b (FIG. 8) of the telescopic cylinder 26 via a pair of hydraulic hoses 87 and 87.

Further, the first relief port 85+ is the first orifice 78. and the first pressure receiving chamber 86 via the oil passage 53;
Orifice 78. and the first solenoid valve 77, the oil sump 5
It also communicates with 7. The second relief port 85□ is the second orifice 7
8! and the second pressure receiving chamber 86□ via the oil passage 54, while the second orifice 78. It also communicates with the oil reservoir 57 via the second solenoid valve 772 . Furthermore, both escape ports 85. ,8
5! It also communicates with the oil reservoir 57 via the beam leaf valve 79 .

1st. Second solenoid valve 77, . 77□ are all always open types.

When the inclination sensor (not disclosed) installed on the tractor 1 detects that the tractor 1 is descending to the right, the first electromagnetic valve 77 is activated.
A valve closing signal is sent to the second electromagnetic valve 77, and when a downward movement to the left is detected, a valve closing signal is sent to the second electromagnetic valve 77.

When the first solenoid valve 77 is closed, the first pressure receiving chamber 86 of the switching valve 76 is closed. The pressure increases, causing the spool 80 to move to the right in the figure. When the spool 80 moves to the right, the first outlet 841 opens the first relief port 85 . and a second outlet 84 . is blocked from the inlet 83 and communicates with the second relief port 852 , so the pressure oil sent from the flow dividing valve 36 to the inlet 83 passes through the first outlet 841 and enters the upper oil chamber 26 of the telescopic cylinder 26 .
supplied to a. On the other hand, the oil in the lower oil chamber 26b flows through the second outlet 84□, the second relief port 85□, the second orifice 78. and is discharged to the oil sump 57 via the second solenoid valve 772. As a result, the telescopic cylinder 26 extends and causes the work implement 18 to rotate to the right with respect to the tractor 1 tilting to the left.

Further, when the second solenoid valve 77□ closes, the second solenoid valve 77
The pressure in the pressure receiving chamber 86□ rises, causing the spool 80 to move to the left in the figure. When the spool 80 moves to the left, the second outlet 84□ is cut off from the second relief port 85□, communicates with the inlet 83, and the first
Exit 84. is blocked from the inlet 83 and the first relief port 85. Therefore, the pressure oil sent from the flow dividing valve 36 to the inlet 83 passes through the second outlet 84□ and enters the lower oil chamber 2 of the telescopic cylinder 26.
6b, while the oil in the upper oil chamber 26a is supplied to the first outlet 845, the first relief port 858, the first orifice 78. and the first is discharged to the oil sump 57 via the magnetic valve 7L. As a result, the telescopic cylinder 26 is contracted and the work implement 18 is moved about 1 to the left with respect to the tractor 1 tilting to the right. In this way, work machine 1
The sun always remains horizontal.

When the work equipment 18 is in a horizontal state, both solenoid valves 771.77
Both □ return to the open state, and the first. Second pressure receiving chamber 86. ．． 8
Since the pressure of 6□ is released, the spool 80 is held in the neutral position by the return spring 81. In the neutral position of the spool 80, the inlet 83 is connected to both relief ports 85. , 85□, so these relief ports 85. , 85t, the pressure oil flowing into the inlet 83 applies approximately equal pressure to the upper and lower oil chambers 26a, 26b of the telescopic cylinder 26 due to the throttle resistance of the orifices 7B, , 78□ communicating with the orifices 7B, , 78□. In this way, the telescopic cylinder 26 is fixed at its current length.

As shown in FIG. 8, the outer surface of the horizontal control block 31 has the first. Second exit 84. ．． 842 respectively. Second hose connection pipes 895 and 89z are attached. On the other hand, an upper oil chamber 2 is provided on the outer surface of the telescopic cylinder 26.
6a and the lower oil chamber 26b, respectively. Second hose connection pipe 90, . 90□ is attached. and the first hose connection pipe 89. ．． 90. The one hydraulic hose 87 is connected to the same dirt floor, and both ends of the other hydraulic hose 87 are connected to the second hose connection pipes 89□, 902.

The pair of hoses 87, 87 are formed to have approximately the same length and are bundled by a coil member 91 with a fixed distance I2 shifted from each other in the longitudinal direction. Correspondingly, in the horizontal control block 31, the first hose connection pipe 89.
The distal end of the first hose connecting pipe 90. is made to protrude from the distal end of the second hose connecting pipe 892 by the distance I2. Connect the tip of the second hose connection pipe 90
．． It is set back from the tip by the above distance.

Therefore, when piping, both hydraulic hoses 87.87
and the first and second hose connection pipes 89 of the horizontal control block 31. ．． 89□ and the other ends of both hydraulic hoses 87 and 87 and the first end of the telescopic cylinder 26. Second hose connection pipe 90. ．． If 90□ are connected to each other, the first hose connection pipe 89 will inevitably
．． ．． 89□ and second hose connection pipes 901, 902
For example, the first hose connection pipe 8
Misconnection such as connecting the second hose connection pipe 91 and the second hose connection pipe 902 can be prevented. That is, both hydraulic hoses 87.
87 as well as the first direction of each Bose 87. Second connecting pipe 89. ．． 90. ; Since there is no need to equally consider compatibility with 89□ and 90□, piping work can be performed accurately and quickly. In the above, the horizontal control block 31
corresponds to the first device of the present invention, and the telescopic cylinder 26 corresponds to the second device.
Compatible with equipment.

Referring again to FIG. 4, the hydraulic extraction block 34 has first and second hose connection ports 92+, 92z, and these hose connection ports 92. ．． Oil passages 93 and 94 communicating with the oil passages 40 and 41 are formed at 92□ and open on the upper surface of the distribution block 29, and a cock 95 is disposed so as to cross both oil passages 93 and 94.

The cock 95 opens the oil passage 9 in its open position O (see Fig. 7).
3 and 94, and a groove 98 that short-circuits both oil passages 93 and 94 at the closed position C (see FIG. 7).

First hose connection port 92. A high-pressure hose 100 connected to the high-pressure part of the external hydraulic loader 99 is connected to the second hose connection port 92! A low pressure hose 101 connected to the low pressure section is connected to.

When the cock 95 is opened and rotated to position 0 to operate the external hydraulic loader 99, the pressure oil sent from the hydraulic pump 56 is supplied to the external hydraulic loader 99 through the oil passages 40, 93 and the high pressure hose. The pressurized oil that has been operated is sent to the diversion valve 36 through the low pressure hose 101 and oil passages 94 and 41. When the external hydraulic loader 99 is operated, the front and rear lift cylinders 14 and 17 are normally inactive, so the pressure oil that has exited the second outlet 36c of the diverter valve 36 opens the unload valve 37. When the cock 95 is rotated to the closing position C to stop the operation of the external hydraulic loader 99 that flows back to the oil sump 57, the oil passages 93 and 94 are short-circuited, and the supply of pressure oil to the external hydraulic loader 99 is stopped. be done. Then, oil passage 9
3.94 short circuit causes the front and rear lift cylinders 14.
It becomes possible to supply pressure oil to 17.

As shown in FIGS. 6 and 7, the hydraulic extraction block 34
is formed flat so that it can be placed in a small space between the distribution block 29 and the sea 1-7, the cock 95 is arranged horizontally, and the hose connection port 92. ．． 9
2□ are provided on both left and right sides of the hydraulic pressure take-off block 34 so that the high and low pressure hoses 100 and 101 are not interfered with by the seat 7.

An operating lever 102 is pivotally supported 103 at the outer end of the cock 95. This operating lever 102 can be rotated between a storage position where it falls coaxially with the container 95 and a use position where it stands up at right angles to the container 95. A torsion coil spring 104 is attached to bias the torsion coil spring 104 in the opposite direction. Incidentally, reference numeral 105 is a retaining plate that prevents the cock 95 from being pulled out from the hydraulic pressure extraction block 34.

Therefore, when operating the cock 95, first rotate the seat 7 forward about the pivot 9 (the state shown by the chain line in FIG. 1).
, by opening the top surface of the hydraulic pressure extraction block 34 and then raising the operating lever 102 to the operating state, the cock 95 can be operated without being obstructed by the seat 7. It can be easily rotated to 2C.

After operation, if you release your hand from the operating lever 102, the spring 104
The operating lever 102 immediately returns to the retracted position with the force of
Even when the sheet 7 is set in a fixed position, interference with the sheet 7 is avoided.

In addition, in blocks 29, 30, and 31 of FIG.
All oil passages shown as being open to 7 actually pass through distribution block 29 .

FIG. 9 shows an example in which the front lift cylinder 14 and the external hydraulic loader 99 are not provided. In this case, the first cover plate 105 is placed on the rear surface R of the distribution block 29 in place of the front/rear switching block 30, and the second cover plate 106 is placed on the -1-plane T of the distribution block 29 in place of the oil pressure extraction block 34. Connected with bolts. The first cover plate 105 includes an oil passage 44,
Since the communication passage 107 connecting the rear lift cylinders 17 and 45 is provided, the rear lift cylinder 17 can be given a rising and falling motion by controlling the rise control valve 32 and the fall control valve 33 as described above. In addition, an oil passage 40 is provided in the second elongation plate 106.
, 41 is provided, pressure oil can be supplied to the flow dividing valve 36 without any problem.

C6 Effects of the Invention According to the present invention, a plurality of hoses are formed to have the same length, and these hoses are bundled with a certain distance shifted from each other in the longitudinal direction, and the plurality of hoses of the first device are Since the tip position of the connecting tube is set to one end of the plurality of hoses, and the tip position of the plurality of hose connecting tubes of the second device is set to be shifted corresponding to the other end of the plurality of hoses, it is possible to Simply connect one end of one hose to multiple hose connection pipes of one device in close proximity to each other, and connect the other end of these hoses to multiple hose connection pipes of another device in close proximity to each other on the same dirt floor. This allows the hose connection pipes of the same system to be connected accurately, and even if special care is taken, incorrect connections can be prevented. Therefore, unlike the conventional color separation method, no extra work is required to prevent erroneous connections, and furthermore, since erroneous connection prevention can be permanently performed, it is also effective during maintenance.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; Fig. 1 is a side view of a riding tractor, Fig. 2 is a rear perspective view of the same tractor with a working machine connected to the rear, and Fig. 3 is a hydraulic control of the same tractor. A perspective view of the device, Figure 4 is a hydraulic circuit diagram of the tractor,
Fig. 5 is a longitudinal sectional side view of the main part of the rear hydraulic cylinder in the same tractor, Fig. 6 is a sectional plan view of the hydraulic pressure take-out block of the hydraulic control device, Fig. 7 is a view taken in the direction of the ■ arrow in Fig. 6, and Fig. 8 is A piping diagram between the horizontal control block of the hydraulic control device and the horizontal control telescopic cylinder of the working machine, and FIG. 9 is a hydraulic circuit diagram when the front/rear switching block and the hydraulic pressure take-out block are removed from the hydraulic control device. . 26... telescopic cylinder as second device, 31...
Horizontal control block as the 1a device, 87... Hose, 89 89□... Hose connecting pipe of the first device, 90,... Hose connecting pipe of the second device, 1,... Constant distance patent Applicant Honda Motor Co., Ltd.

Claims (1)

[Claims] In a hose connection structure in which a plurality of hose connection pipes attached to a first device and a plurality of hose connection tubes attached to a second device are connected by a plurality of hoses in the same system, the plurality of hoses are connected to the same length. In addition to forming these hoses into
The first
The device is characterized in that the tip positions of the plurality of hose connection tubes of the device are set at one end of the plurality of hoses, and the tip positions of the plurality of hose connection tubes of the second device are set so as to correspond to the other ends of the plurality of hoses. Hose connection structure.