JPH0438144Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The invention is a valve device consisting of a plurality of manually operated hydraulic directional valves arranged in parallel, and eliminates interference between hydraulically driven actuators. To prevent both actuators from interfering with each other during the transition period when both operating levers are switched at the same time, regarding the type of directional control valve equipped with a mechanical interlock device that mutually checks the switching positions of the operating levers of each directional control valve. It's technology.

<Background of the invention> Generally, in a hydraulic system, in order to avoid interference between two actuators, the operating levers of two hydraulic directional valves are checked against each other by a mechanical interlock device.

For example, as shown in FIG. 3, when replacing the lower mold 2 on the bolster 1a of the press machine 1, the clamp cylinder 4a for fixing the lower mold operates to clamp, and the lift for lifting the die roller 3b operates. When the cylinder 3a is lifted,
Both cylinders 3a, 4a may interfere and damage the hydraulic clamp 4, lower mold 2, or die roller 3b. In order to avoid this interference, the operating lever 19 of the directional switching valve 11 that operates the clamp cylinder 4a and the operating lever 20 of the directional switching valve 12 that operates the lift cylinder 3a are both at the simultaneous closing prohibited positions E ₁ , E ₂ ( A mechanical interlock device 60 prevents the pump from being introduced into the pressure supply positions X ₁ , X ₂ ).

The basic structure of this hydraulic directional valve device with interlock device is as follows.

For example, as shown in FIGS. 1 to 7 or 12, at least two directional control valves 11, 12 of the hydraulic system A are arranged in parallel, and each operating lever 19, 20 of each directional control valve 11, 12 is installed in parallel. are located at appropriate distances from each other in the direction in which the valves are arranged side by side, and the simultaneous closing permissible positions D ₁ and D ₂ are located along the direction perpendicular to the direction in which the valves are arranged in parallel, respectively.
An interlock device 60 that prevents both operation levers 19 and 20 from being simultaneously inserted into the simultaneous injection prohibition positions E ₁ and E ₂ is provided so as to be switchable between the simultaneous injection prohibition positions E ₁ and E ₂ . It is constructed by being attached between the levers 19 and 20.

<Prior art> In the above basic structure, the interlock device 6
As a structure for putting 0 into practical use, the present inventor has:
The one described in Utility Model Publication No. 57-57273 was proposed first.

As shown in Fig. 12, each directional control valve 1
The operating shafts 101 and 102 supported on the left operating shafts 101 and 12 are arranged concentrically and facing each other.
A locking pin 103 protrudes from an eccentric position of the abutting end surface of the right operating shaft 102, and a locking surface 104 is formed on the abutting end surface of the right operating shaft 102. Then, when both operating levers 19 and 20 are about to be thrown into the simultaneous injection prohibited positions E ₁ and E ₂ , the locking pin 103 and the locking surface 104 come into contact and prevent the simultaneous injection. It is.

<Problems to be solved by the invention> In the state shown in the solid line diagram in FIG.
At E ₁ , the right operating lever 20 is placed in the simultaneous injection permission position D ₂ .

From the state shown in the solid line diagram, when the right operating lever 20 is suddenly operated from the simultaneous closing allowable position D ₂ to the simultaneous closing prohibited position E ₂ , the left side The operating levers 19 of are simultaneously switched and moved from the simultaneous injection prohibition position _E1 to the simultaneous injection permission position _D1 .

During the transition period of this simultaneous switching movement, the two directional control valves 11 and 12 are simultaneously in the pressurized state, and the two actuators (for example, the clamp cylinder 4a and lift cylinder 3a in FIG. 3) may interfere with each other. .

The present invention aims to eliminate interference between both actuators during the transition period of simultaneous switching movement by preventing both operating levers from switching simultaneously.

<Means for Solving the Problems> In order to achieve the above object, the present invention adds the following improvements to the above basic structure.

For example, as shown in FIGS. 1 to 7, the interlock device 60 includes a check pin 61 and a neutral return spring ₆₂ . In the space surrounded by D ₂ and both simultaneous closing prohibited positions E ₁ and E ₂ , the sliding support part 63 supports the valves so as to be slidable in the direction in which the valves are arranged side by side, and the neutral return spring 62 returns to the neutral position N
The pin ends 68, 69 of the restraining pin 61 are plunged into the lever movement spaces S ₁ , S ₂ in which the operating levers 19, 20 move, and the pin ends 68, 69 of the restraining pin 61 are Each operating lever 19, 2
Sliding check surfaces e ₁ and e ₂ are formed on the side surfaces of the pin end facing the simultaneous loading prohibited positions E ₁ and E ₂ of 0, respectively, and the side surfaces of the pin end facing the simultaneous loading permitted positions D ₁ and D ₂ are respectively formed. Sliding permitting grooves d ₁ and d ₂ are respectively formed in the openings, and the sliding restraining surfaces e ₁ and e ₂ are received by the operation levers 19 and 20 placed in the simultaneous closing prohibition positions E ₁ and E ₂ , respectively. , the pin ends 69, 68 on the opposite side are maintained in a state of protruding into the lever movement spaces S ₂ , S ₁ to prevent the position switching movement of the operation levers 20, 19 on the opposite side, and each Sliding permissible grooves d ₁ and d ₂ are the operating lever 1 inserted into the simultaneous closing permissible positions D ₁ and D ₂
By making it possible to move to the 9 and 20 sides,
Lever movement space for opposite pin ends 69 and 68
It is characterized in that it is configured to allow free movement to the outside of S ₂ and S ₁ and to permit position switching movement of the operating levers 20 and 19 on the opposite side.

<Operation> The present invention operates as follows in order to avoid simultaneous switching operations of both operating levers.

In the state shown by the solid lines in FIGS. 1 and 2, the left operating lever 19 is in the simultaneous closing prohibited position _E1 , and the right operating lever 20 is in the simultaneous closing allowing position _D2 .

From the state shown in this solid line diagram, the right operating lever 20
from simultaneous loading permissible position D ₂ to simultaneous loading prohibited position E ₂
When the operation lever 20 contacts the right pin end 69 of the check stop pin 61, the check pin 61 slides to the left, and the sliding check surface e of the left pin end 68 ₁ presses the left operating lever 19 to the simultaneous injection prohibition position E ₁ .

As a result, the left operating lever 19 is left in the simultaneous closing prohibited position E ₁ and is placed in the simultaneous closing permitted position D _{1 .}
Switching to is prevented. At the same time, the left sliding restraint surface e ₁ is received by the operating lever 19 to maintain the right pin end 69 in the lever movement space S ₂ , so that the right operating lever 20 is Switching from the simultaneous injection permissible position D ₂ to the simultaneous injection prohibited position E ₂ is prevented.

Therefore, both operating levers 19, 20 do not switch and move simultaneously, and each direction switching valve 11, 1
Interference between the actuators connected to each other is eliminated.

<Example> Embodiments of the present invention will be described below with reference to the drawings.

Figures 1 to 7 show one embodiment of the invention, in which Figure 1 is a sectional view taken along the - line in Figure 5, Figure 2 is an exploded perspective view schematically showing the hydraulic directional control valve device, and Figure 3 is a cross-sectional view taken along the line -. Overall configuration diagram showing the state of use, Figure 4 is a longitudinal front view,
5 is a sectional view taken along the - line in FIG. 4, FIG. 6 is a sectional view taken along the - line in FIG. 4, and FIG.
It is a cross-sectional view taken along the line - in the figure.

First, the overall configuration of the present invention will be explained with reference to FIG.

Reference numeral 1 denotes a press machine, in which a lower mold 2 is mounted on a bolster 1a with hydraulic lifters 3, 3 and hydraulic clamps 4, 4, and an upper mold 5 is fixed on a slide 1b with hydraulic clamps 6, 6.

The hydraulic lifter 3 has a single-acting spring return type lift cylinder 3a installed inside the bolster 1a, and by supplying pressure oil to the lift cylinder 3a, a die roller 3b provided on the upper part of the lift cylinder 3a moves to the upper surface of the bolster 1a. The lower mold 2 is protruded from the bolster 1a.
The top can be freely transported. On the contrary, by discharging the pressure oil from the lift cylinder 3a, the die roller 3b is retracted into the bolster 1a by the return spring force. The hydraulic clamp 4 also has a single acting spring return type clamp cylinder 4a installed therein, and by supplying pressure oil to the clamp cylinder 4a, the clamp arm 4b is swung toward the clamp side, and the lower mold 2
is fixed to the bolster 1a. On the contrary, by discharging the pressure oil from the clamp cylinder 4a, the clamp arm 4a is swung toward the unclamping side by the return spring force, and the fixation of the lower mold 2 is released.

The above hydraulic lifters 3, 3 and hydraulic clamps 4, 4
A hydraulic device A is provided for supplying and discharging pressurized oil. This consists of a hydraulic pump 8, an oil tank 9, and a hydraulic directional valve device 10. This valve device 10
is a manually operated two-position two-way directional valve 11,
12 and the working port of the left directional valve 11
A ₁ is connected to the hydraulic clamps 4, 4,
The working port A ₂ of the right-hand directional control valve 12 is connected to the hydraulic lifter 3 , 3 . In addition, the directional control valve 1
Each of the pressure ports P ₁ and P ₂ of 1 and 12 is connected to a hydraulic pump 8 via a common pressure port P, and each return port R ₁ and R ₂ is connected to an oil tank 9 via a common return port R. be done. When the operating levers 19 and 20 are operated as shown in the drawing, the right directional control valve 12 is moved to the oil drain position _Y2.
, the die roller 3b of the hydraulic lifter 3 is retracted into the bolster 1a, the left direction switching valve 11 is switched to the pressure supply position _X1 , and the clamp arm 4b of the hydraulic clamp 4 moves the lower mold 2. Fix it to the bolster 1a.

The structure of the switching valve device 10 described above is shown in FIGS. 2 and 4.
This will be explained based on FIGS. 7 to 7.

Two directional control valves 11 and 12 are clamped and fixed between a pair of left and right plates 13 and 14. These directional switching valves 11 and 12 are constructed in substantially the same way, and are formed by vertically connecting switching valve bodies 15 and 16 and switching operation means 17 and 18, respectively, and are constructed as follows. .

First, the left directional control valve 11 will be explained mainly with reference to FIG.
A cylindrical valve chamber 25 is formed in the center of the valve 3 so as to extend in the vertical direction. The pressure port P ₁ is on the upper end wall of this valve chamber 25, and the return port R ₁ is on the lower end wall.
However, a working port _A1 is opened in the peripheral wall.
A return valve body 27 is inserted into the valve chamber 25 so as to be operable to open and close the return port _R1 .

A guide hole 28 and a pressure relief hole 29 are formed in the return valve body 27 at the top and bottom facing the return port _R1 . Further, a pressure supply valve body 30 is inserted into the pressure port P ₁ in the guide hole 28 so that it can be opened and closed, and a pressure relief valve body 31 is inserted into the pressure relief hole 29 so that it can be opened and closed. These pressure supply valve bodies 30
A valve closing spring 32 made of a compression coil spring is installed between the pressure relief valve body 31 and the pressure relief valve body 31 .

Each of the valve bodies 27, 30, 31 is opened and closed by the switching operation means 17. This switching operation means 17 is constructed as follows.

A press cylinder 35 is inserted into the valve lid 24 so as to be slidable vertically and oil-tight, and an output rod 3 is inserted into the press cylinder 35.
6 is inserted so as to be able to freely slide vertically in an oil-tight manner. Output rod 36
A pressure relief valve opening tool 37 and a return valve opening tool 38 are vertically formed on the upper part of the pressure relief valve body 31 and the return valve body 27, respectively. A pressing spring 40 that biases the output rod 39 upward is installed between a spring receiving collar 39 formed by expanding the diameter of the midway portion of the output rod 36 and the lower wall of the pressing tube 35.

Also, a return spring 41 is provided between the spring receiving collar 39 and the upper wall of the valve lid 24 to bias the output rod 39 downward.
is installed.

On the other hand, an operating housing 43 is provided at the bottom of the valve box 23.
is fixed, and an operating shaft 44 in a horizontal position is supported at the lower part of the housing 43 so as to be rotatable around the axis. The operating shaft 44 has a reduced diameter portion 4 at the center in the lateral direction.
5, and a pressing pin 46 is installed at an upper eccentric position between the left and right side walls of this reduced diameter portion 45.
A cylindrical pressing roller 47 fitted with the pressing pin 46 is brought into contact with the lower surface of the pressing cylinder 35 .

The operating lever 19 is connected to the operating shaft 44 as shown in FIG. That is, the switching rod 51 is screwed and fixed to the base end of the lever body 50.
is inserted into the right-hand portion of the operating shaft 44 so as to be slidable in the radial direction, and is pressed by the compression spring 53 in the opposite direction to the lever body 50 .

An engagement protrusion 54 is provided at the tip of the switching rod 51, and a pair of engagement holes 55, 56 are formed in the operation housing 43 corresponding to the switching position of the engagement protrusion 54. In addition, the switching rod 5
If the vertical movement exceeds the predetermined amount of 1, the operation housing 4
Upper and lower stopper surfaces 57, 58 formed on the front side of 3
regulated by.

Further, the right-hand directional control valve 12 is configured almost the same as the left-hand directional control valve 11, and a pressure port P ₂ , a return port R ₂ , and a work port A ₂ are formed in the valve box 23 of the control valve main body 16. be done. Pressure ports P ₁ and P ₂ of both switching valves 11 and 12 are communicated with a common pressure port P provided on the right side plate 14,
Return ports R ₁ and R ₂ are on the same right plate 14 as above.
The terminals are connected to a common return port R provided in the terminals.
On the other hand, work ports A ₁ and A ₂ are opened at the front surfaces of the valve boxes 23 and 23, respectively. As shown in FIGS. 6 and 7, the pressing pin 46 and the pressing roller 47 of the right switching operation means 18 are arranged so that the phase of the eccentric position is set at a predetermined angle compared to that of the left switching operation means 17. Only progress has been made.

Next, the switching operation of each of the directional switching valves 11 and 12 having the above configuration will be explained based on FIGS. 3 and 4.

When the hydraulic clamp 4 is to be clamped, the left directional control valve 11 is moved to the pressure supply position X ₁ by rotating the left operating lever 19 upward.
can be switched to

That is, with the upward rotation of the operating lever 19, the pressing roller 47 is swung to a downward position (solid line in FIG. 7), and the output rod 36 is retreated downward by the return spring 41. As a result, the pressure oil in the pressure port _P1 pushes open the pressure supply valve body 30, flows into the valve chamber 25, and is supplied from the working port _A1 to the clamp cylinder 4a of the hydraulic clamp 4. When the clamp arm 4a presses the lower mold 2, the working pressure in the valve chamber 25 gradually increases due to the pressing resistance, and when the working pressure reaches the set working pressure, the pressure supply valve body 30 closes. It is pushed closed by the valve spring 32, and the hydraulic clamp 4 enters a working state in which it presses the lower mold 2 with a set working pressure.

Contrary to the above, when unclamping the hydraulic clamp 4, the left operating lever 19 is rotated downward to switch the directional control valve 11 to the oil draining position _Y1 . That is, the operating lever 19
As the pressure roller 47 rotates downward, the pressure roller 47 is swung upward (as shown by the two-dot chain line in FIG. 7), and the output rod 36 is advanced upward via the pressure cylinder 35 and the pressure spring 40. As a result, first, the pressure relief opening tool 37 pushes open the pressure relief valve body 31 to release the pressure in the valve chamber 25 and the hydraulic clamp 4 from the pressure relief hole 29, and then the return valve opening device 38 pushes the return valve body 27 open. The hydraulic clamp 4 is pushed open and the hydraulic oil in the hydraulic clamp 4 is discharged from the valve chamber 25 to the return port R ₁ via the work port A ₁ , and the hydraulic clamp 4 is unclamped by the return spring force. At this time, the pressure supply valve body 30 is sufficiently pushed closed by the output rod 36 through the elastic force of the pressure spring 40, so that the pressure oil in the pressure port _P1 is transferred to the valve chamber 2.
5 and leakage to return port _R1 is prevented.

Furthermore, when lowering the hydraulic lifter 3,
By rotating the operating lever 20 upward,
The right directional control valve 12 is switched to the oil drain position _Y2 . That is, as the operating lever 20 is rotated upward, the pressing roller 47 is swung to the upper position (sixth
(shown by a solid line in the figure), the output rod 36 is advanced upward.
Then, as in the case of the left directional control valve 11,
The hydraulic oil in the hydraulic lifter 3 is discharged from the valve chamber 25 to the return port _R2 via the work port _A2 , and the hydraulic lifter 3 is lowered by the return spring force. Contrary to the above, when raising the hydraulic lifter 3,
The operating lever 20 is rotated downward to swing the pressure roller 47 to the downward position (as shown by the chain double-dashed line in FIG. 6), and the output rod 36 is retracted downward. Then,
Similarly to the left directional valve 11, the pressure port P ₂
Pressure oil inside is supplied to the hydraulic lifter 3 from the working port A ₂ through the valve chamber 25, thereby raising the hydraulic lifter 3.

In the above configuration, a means is provided to prevent the hydraulic clamp 4 from being clamped in a state where the hydraulic lifter 3 is raised and the lower mold 2 is lifted. This means will be explained below mainly with reference to FIGS. 1 and 2.

The operating lever 19 is rotated upward so that the left directional control valve 11 is in the pressure supply position X ₁ , and the operating lever 20 is rotated downward so that the right directional control valve ₁₂ is in the pressure supply position The positions in which the operating levers 19 _and 20 are in the rotational posture opposite to the above are named simultaneous closing permitted positions D ₁ and D _{2 ,} respectively. Name it.

An interlock device 60 is provided between the operating levers 19 and 20 so as to prevent the operating levers 19 and 20 from being simultaneously inserted into the simultaneous closing prohibited positions E ₁ and E ₂ . This interlock device 60 consists of a check pin 61 and a neutral return spring 62, and is constructed as follows.

A sliding support portion 63 having a circular cross section is laterally penetrated through the lower front surface of the right operation housing 43, and a cylindrical check pin 61 is inserted into the sliding support portion 63 so as to be slidable laterally. A spring mounting groove 65 is formed above the restraining pin 61 near the center in the longitudinal direction, and a spring receiving groove 66 is formed in the operation housing 43 correspondingly. Both grooves 6 above
5 and 66, the neutral return spring 62 is attached via a retaining pin 67 so as to prevent it from coming off. As a result, the restraint pin 61 can be operated by both operating levers 19
_{20 , the neutral} return spring 6
2, it is returned to the neutral position N.

The check pin 61 has a left pin end 68 thrust into the vertical lever movement space S1 of the operating lever 19, and a right pin end 69 inserted into the vertical lever movement space _S1 of the operating lever 20. Rushed into ₂ .

Each operating lever 1 is attached to each pin end 68, 69.
Taper-shaped sliding restraint surfaces e ₁ and e ₂ are formed on the side surfaces of the pin ends facing the simultaneous injection prohibited positions E ₁ and E ₂ of 9 and 20, respectively. In addition, sliding permissible grooves d ₁ and d ₂ are formed on the side surfaces of the pin ends facing the respective simultaneous injection permissible positions D ₁ and D ₂ , respectively.

As _shown by _the solid line diagram in _FIG . , the right pin end 69 is maintained in a state inserted into the lever movement space _S2 . This prevents the right operating lever 20 from switching to position _E2 . On the other hand, when the left operating lever 19 is rotated downward in this state, the restraining pin 61 slides to the right against the neutral return spring 62, and the right pin end 69 is moved largely into the lever movement space _S2. Although the right operating lever 20 is prevented from switching to position _E2 , the left operating lever 19 is
Allow switching movement to position D ₁ .

Furthermore, even when both operating levers 19 and 20 are in positions D ₁ and E ₂ as shown by the two-dot chain diagram in FIG. .

As shown in FIG. 7, in the left directional control valve 11 as well, a circular through hole 64 corresponding to the sliding support portion 63 is formed in the lower part of the operation housing 43.

Further, in the above embodiment, two directional control valves are installed in parallel, but three or more directional control valves may be installed in parallel.

FIG. 8 and FIG. 9 show other embodiments, and a structure different from the above embodiment will be explained.

Figure 8 is an overall configuration diagram, in which a hydraulic support 72 and a hydraulic clamp 4 are mounted on the table T of the machining center.
The protruding portion of the workpiece W is fixedly supported through the support.
The hydraulic support 72 has a support shaft 74 on the outer cylinder 73.
is pressed upward by the compression spring 75, and the outer cylinder 7
A clamp cylinder 77 is installed between the support shaft 74 and the support shaft 74 . 78 is a hydraulic chamber.

Of the two switching valves 11 and 12, two directional switching valves of the same type as the switching valve 11 are arranged side by side, and both ends of the check pin 61 are configured as shown in FIG. When fixing the workpiece W, both the switching valves 11 and 11 are moved to the oil draining position Y ₃ ,
In the state of Y ₄ , first switch the left operating lever 19 from position E ₁ to D ₁ , switch the left switching valve 11 to pressure supply position X ₃ , and move the support shaft 74 of the oil support 72 to the clamp cylinder 77. Fix it with. Next, switch the right operating lever 20 from position D ₂ to position E ₂ , and move the right switching valve 11 to the pressure supply position.
Switch to X ₄ and clamp arm 4 of hydraulic clamp 4.
Activate the clamp b.

Conversely, when releasing the fixation of the workpiece W, first use the operating lever 20 to move the right switching valve 11 to the oil drain position.
_Then , the operation lever 19 is used to switch the left switching valve 11 to the oil drain position _Y3 .

It is also possible to configure the interlock device 60 as shown in FIG. 10 or 11 depending on the use of the switching valve.

<Effects of the Invention> Since the present invention is configured and operates as described above, it has the following effects.

When the operating lever on either side switches to the simultaneous closing prohibited position, the pin end on the opposite side of the check pin enters into the lever movement space on the opposite side, and the operating lever on the opposite side moves to the simultaneous closing prohibited position. Pressing and forcibly blocking the switching movement. On the other hand, since the pin end on the opposite side is received by the operation lever on the opposite side, the pin end on the one side is maintained in a state protruding into the lever movement space on the one side, so that the operation on the one side is The lever is prevented from switching to the simultaneous closing prohibition position.

In this way, both operating levers are reliably prevented from switching and moving at the same time, so there is no interference between the actuators connected to the respective directional switching valves.

[Brief explanation of the drawing]

1 to 11 show embodiments of the present invention,
Figures 1 to 7 show one embodiment of the invention, in which Figure 1 is a sectional view taken along the - line in Figure 5, Figure 2 is an exploded perspective view schematically showing the hydraulic directional control valve device, and Figure 3 is a cross-sectional view taken along the line -. 4 is a longitudinal front view, FIG. 5 is a sectional view taken along the - line in FIG. 4, FIG. 6 is a sectional view taken along the - line in FIG. 4, and FIG. 8 and 9 show other embodiments, FIG. 8 is a view corresponding to FIG. 3, FIG. 9 is a view equivalent to FIG. 1, and FIG. FIG. 11 shows still another embodiment, and a schematic diagram corresponding to FIG. 1 and a schematic diagram corresponding to FIG.
FIG. 2 is a diagram corresponding to FIG. 2 showing a conventional example. 11, 12... Directional switching valve, 19, 20... Operating lever, 60... Interlock device, 61...
... Check pin, 62 ... Neutral return spring, 63 ... Sliding support part, 68, 69 ... Pin end, A ... Hydraulic system, D ₁ , D ₂ ... Simultaneous closing permissible position, E ₁ , E ₂ ...
... Simultaneous injection prohibited position, N ... Neutral position, S ₁ , S ₂ ...
... Lever movement space, d ₁ , d ₂ ... Sliding allowance groove, e ₁ ,
e ₂ ...Sliding check surface.

Claims (1)

[Claims for Utility Model Registration] At least two directional control valves 11 and 12 of the hydraulic system A are arranged side by side, and the operation levers 19 and 20 of each direction control valve 11 and 12 are arranged at appropriate intervals from each other in the direction in which the valves are arranged side by side. At a distance from each other, the valves are provided so as to be operable to switch between simultaneous closing positions D ₁ and D ₂ and simultaneous closing prohibited positions E ₁ and E ₂ along the direction orthogonal to the direction in which the valves are arranged side by side, respectively.
Both operation levers 19 and 20 are in a position E ₁ where simultaneous closing is prohibited,
In a hydraulic directional control valve device with an interlock device, which is configured by installing an interlock device 60 between both operating levers 19 and 20 to prevent simultaneous input into _E2 , the interlock device 60 is connected to a check pin 61. It consists of a neutral return spring 62, and the check pin 61 is at the position D ₁ that allows both operation levers 19 and 20 to be closed simultaneously.
In the space surrounded by D ₂ and both simultaneous closing prohibited positions E ₁ and E ₂ , the sliding support part 63 supports the valves so as to be slidable in the direction in which the valves are arranged side by side, and the neutral return spring 62 returns to the neutral position N. The restraining pin 61
The respective pin ends 68, 69 of the respective operating levers 19, 2
0 into the lever movement spaces S ₁ and S ₂ in which the pins move, and on the side surfaces of the pin ends facing the simultaneous closing prohibited positions E ₁ and E ₂ of the operating levers 19 and 20 at each pin end 68 and 69, respectively. In addition to forming sliding check surfaces e ₁ and e ₂ , sliding permission grooves d ₁ and d ₂ are respectively formed on the side surfaces of the pin ends facing the respective simultaneous loading permission positions D ₁ and D ₂ , and each sliding check surface e ₁ and e ₂ are positions where simultaneous injection is prohibited
By being received by the operating levers 19, 20 inserted into E ₁ and E ₂ , the opposite pin end 69,
68 into the lever movement spaces S ₂ and S ₁ to prevent the position switching movement of the operating levers 20 and 19 on the opposite side.
By allowing d ₁ and d ₂ to move toward the operation levers 19 and 20 that are inserted into the simultaneous insertion permissible positions D ₁ and D ₂ , lever movement spaces S _{2 and 2} of the pin ends 69 and 68 on the opposite side are created. A hydraulic directional control valve device with an interlock device, characterized in that it is configured to freely move outside S ₁ and to allow the operation levers 20 and 19 on the opposite side to switch positions.