JPH0729385U - Manual switching valve - Google Patents

Abstract

(57) [Abstract] [Purpose] It is possible to secure the safety of the operator while reducing the cost by using only one manual switching valve 1. [Structure] The mounting side of a position switching lever 12 provided in the valve body 11 is constantly engaged with the lever 12 at each position switching position of the valve body 11 to regulate the swinging operation thereof. A regulation plate 13 is provided so that it can swing to the side opposite to the lever when the position is switched.

Description

[Detailed description of the device]

The present invention relates to a manual switching valve for operating actuators such as hydraulic and pneumatic cylinders.

[0002]

[Prior art]

 Generally, when manually operating the actuators provided in various machines, two-handed operation is performed to ensure the safety of the operator.

Conventionally, as a manual switching valve for operating the actuator, as shown in FIG. 3, three manual first to third valves A provided with push operation parts A1, B1 and C1. , B, C and one master fourth valve D, a pressure supply source E is connected to the upstream side of the first valve A, and the second valve is connected to the downstream side of the first valve A. The third valves B and C are connected in parallel, and the fourth valve D is connected to the downstream side of the second and third valves B and C, while the cylinder is connected to the downstream side of the fourth valve D. An F (actuator) is connected, and a base F2 on which various devices are installed is provided at the tip end side of a piston F1 provided in this cylinder F. In the figure, G and H are a check valve and a flow control valve, respectively, which are provided in the middle of the pipe between the fourth valve D and the cylinder F.

Then, when raising the base F2, by pushing the operating portion B1 of the second valve B while pushing the operating portion A1 of the first valve A, The fourth valve D is switched to the rising position, the pressure fluid from the pressure supply source E is introduced to the lower side of the cylinder F, and the upper side of the cylinder F is opened to the outside so that the pressure fluid The piston F1 is raised and the base F2 is raised.

On the other hand, when lowering the base F2, by pushing the operating portion C1 of the third valve C while pushing the operating portion A1 of the first valve A, The fourth valve D is switched to the lower position, the pressure fluid from the pressure supply source E is introduced to the upper side of the cylinder F, and the lower side of the cylinder F is opened to the outside, so that the base F2 is opened. Is lowered. Further, the first to third valves A to C switch the fourth valve D to the fluid cutoff side by releasing the hands from the operating portions A1 to C1, and the pressure supply source E to the cylinder F. The supply of pressure fluid to the is stopped.

[0006]

[Problems to be solved by the device]

 According to the above-mentioned configuration, only by operating the operating portions B1 and C1 of the second or third valves B and C while operating the operating portion A1 of the first valve A, that is, Since the cylinder F is raised or lowered only by pushing and operating these operation portions B1 and C1 with both hands, the safety of the operator can be ensured. However, in the above configuration, it is necessary to use the four first to fourth valves A to D in order to ensure the safety of the operator, so that not only the piping becomes complicated, but also the number of required parts is increased. There was a problem that the cost increased due to the increase in the number.

The present invention has been made in view of the above problems, and an object thereof is to use only one manual switching valve to reduce the cost and ensure the safety of workers. There is a point in doing so.

[0008]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a manual switching valve for operating an actuator, wherein a position switching lever provided on a valve body is attached to a mounting side, and the lever is provided at each position switching position of the valve body. It is characterized in that a regulating plate is provided which is always engaged with the lever to regulate its swinging operation, and is capable of swinging at a position not engaged with the lever when each position is switched by the lever.

[0009]

[Action]

 When operating the actuator, first, swing the regulating plate with one hand to swing the lever with the other hand while releasing the regulation of the lever position by the regulating plate. By operating, the position of the valve body is switched, and the actuator is operated accordingly. That is, since the actuator is operated only by operating the regulating plate and the lever with both hands, the safety of the operator is ensured. Also, with the above configuration, since only one manual switching valve is used, the piping configuration is simplified, the number of parts is reduced, and the cost is reduced, while ensuring worker safety. be able to.

[0010]

【Example】

 Hereinafter, a manual switching valve of the present invention will be described based on an embodiment shown in the drawings. FIG. 1 shows a pneumatic piping circuit of an actuator using one of the manual switching valves according to the present invention. In FIG. 1, 1 is a 4-port 2-position switching manual switching valve. A pressure supply source 2 such as an air pump or a compressor is connected to the upstream side of the valve 1, and a pneumatic cylinder 3 is connected to the downstream side of the valve 1 as an example of the actuator. A base 32 on which various devices are installed is provided on the tip side. In the figure, reference numerals 4 and 5 are a check valve and a flow rate adjusting valve, respectively, which are interposed in the piping between the valve 1 and the cylinder 3.

The manual switching valve 1 is shown by the symbol in FIG. 1 and, as shown in FIG. 2, on the mounting side of the position switching lever 12 provided in the valve main body 11, the valve main body 11 is provided. In each position switching position, the lever 12 is always engaged to regulate the swinging operation of the lever 12, and a regulating plate 13 that is swung to a position not engaged with the lever is provided when the position switching by the lever 12 is performed. ing.

More specifically, a support plate 14 is mounted on the mounting side of the position switching lever 12 of the valve body 11, and a vertically extending cylindrical body 15 is mounted on one side of the regulating plate 13 in the longitudinal direction. Then, the cylindrical body 15 is rotatably supported by the support plate 14 via a pivot shaft 16, and the regulation plate 13 can be horizontally swung about the pivot shaft 16, while the shaft rod 16 and A coil spring 17 is interposed between the tubular body 15 and the coil spring 17 to constantly urge the regulating plate 13 toward the lever 12.

As shown by the solid and phantom lines in FIG. 2, when the lever 12 is switched to the ascending / descending positions X and Y, the regulating plate 13 has the levers at the respective positions X and Y. Two semi-circular arc-shaped first and second engagement holes 13 a and 13 b that are engaged with 12 are formed. Further, on the lower side of the regulation plate 13, an operation portion 13c which also serves as a reinforcement of the regulation plate 13 is provided.

Next, the operation of the above configuration will be described. When raising the base 32 provided in the cylinder 3, first, as shown by the phantom line from the solid line state in FIG. 2, the regulating plate 13 is moved to the opposite lever side around the pivot 16 with one hand. In a state in which the position regulation of the lever 12 by the regulation plate 13 is released by performing the rocking operation, the lever 12 is rocked by the other hand as shown by the solid line in FIG. By switching 11 to the ascending side position X, the pressure air from the pressure supply source 2 is introduced into the lower side of the cylinder 3, and the upper side of the cylinder 3 is opened to the outside, so that the pressure air causes the piston to move. 31 is raised, and the base 32 is raised. Further, after the lever 12 is switched to the ascending side position X, by releasing the hand from the regulating plate 13, the regulating plate 13 is swung to the lever side by the coil spring 17, and the first side thereof is moved. The engaging hole 13a is engaged with the lever 12, and the position of the lever 12 is regulated so that it cannot be swung.

On the other hand, when lowering the base 32, as in the case described above, the regulating plate 13 is swung to the side opposite to the lever around the pivot 16 with one hand, and the regulating plate 13 is moved. In a state where the position regulation of the lever 12 by 13 is released, the lever 12 is rocked by the other hand as shown by the phantom line in the figure to switch the valve body 11 to the lower / lower position Y. As a result, the pressure air from the pressure supply source 2 is introduced to the upper side of the cylinder 3 and the lower side of the cylinder 3 is opened to the outside, and the piston 31 is lowered by the pressure air, The base 32 is moved down. Further, after the lever 12 is switched to the lower position Y, by releasing the hand from the regulating plate 13, the regulating plate 13 is swung to the lever side by the coil spring 17, and the second side thereof is swung. The engaging hole 13b is engaged with the lever 12, and the lever 12 is positionally regulated so as not to be swingable.

As described above, when the cylinder 3 is moved up or down, first, the regulating plate 13 is rocked by one hand to regulate the position of the lever 12 by the regulating plate 13. By swinging the lever 12 with the other hand in the released state, the positions X and Y of the valve body 11 are switched, and the cylinder 3 is operated accordingly, that is, the regulation is performed. Since the cylinder 3 is operated only by operating the plate 13 and the lever 12 with both hands, the safety of the operator is ensured. Also, with the above configuration, since only one manual switching valve 1 is used, the piping configuration is simplified, the number of parts is reduced, and the cost is reduced, while ensuring worker safety. can do.

In the above embodiments, the 4-port 2-position switching type manual switching valve 1 is shown, but in the present invention, switching valves other than this can be used. In this case, the restriction plate 13 is formed with an engagement hole corresponding to the switching position of the switching valve. Further, in the embodiment, the pneumatic cylinder 3 is used as the actuator example, but a hydraulic cylinder or the like may be used instead of this cylinder.

[0018]

[Effect of device]

 As described above, the manual switching valve according to the present invention is always engaged with the mounting side of the position switching lever provided in the valve main body, and with the lever at each position switching position of the valve main body. By restricting the swinging operation and providing a swingable restriction plate at the position not engaged with the lever when switching between the positions by the lever, that is, by operating the restriction plate and the lever with both hands. Only, since the actuator is operated, the safety of the operator can be secured, and since only one manual switching valve is used, the piping structure is simplified and the parts are The number of points can be reduced and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a piping circuit diagram of an actuator to which a manual switching valve of the present invention is applied.

FIG. 2 is a perspective view showing a main part of the same-operation switching valve.

FIG. 3 is a piping circuit diagram of a conventional actuator.

[Explanation of symbols]

11 ... Valve body, 12 ... Position switching lever, 1
3 ... Regulator plate, 3 ... Actuator (pneumatic cylinder).

Claims (1)

[Scope of utility model registration request] 1. A manual switching valve for operating an actuator, which is always engaged with a mounting side of a position switching lever provided in a valve body at each position switching position of the valve body. A switching valve for manual work, characterized in that the swinging operation is regulated, and a regulating plate is provided at a position which is not engaged with the lever when the position is switched by the lever.