Control lever safety apparatus for heavy equipment

Control joystick safety equipment for heavy equipment

Technical field

The present invention relates to a control joystick safety device for heavy equipment. The device tilts the safety rod downward when the control box installed on the side of the driver's seat is tilted so as to cut off the electrical signal connected to the control rod. It can also prevent the working equipment from moving when the control lever is incorrectly manipulated or touched in the state of starting the equipment.

Background technique

As shown in FIG. 1, in the control joystick safety device for heavy equipment in the prior art, a control box 2 with a joystick 1 is installed on one side of the driver's seat to manipulate the work equipment. The control box 2 can be tilted around a hinge pin 7 through the extension operation of the gas spring 4 fixed at one end to the bracket 3 to which the driver's seat is fixed. A limit switch 5 is connected to the lower surface of the control box 2, so that when the power is turned on and off according to the operation of the control box 2, a solenoid valve can be opened and closed. A safety rod 6 can be installed on one side of the control box 2 so that when the driver leaves the seat, the control box 2 can be tilted to cut off the power supply of the working equipment, thereby cutting off the supply of electrical signals to the control box 2 to prevent work The wrong action of the device.

In the drawings, reference numeral 8 denotes a support member for supporting the control box 2, and 9 denotes an elastic member that is elastically biased and supported in an initial state in which the power supply of the limit switch 5 is connected to the safety rod 6 through the support.

Therefore, in the case where the driver leaves the seat during work, when the lock lever (not shown) is operated, the locked state of the control box 2 may be released, and due to the extension of the gas spring 4 shown by the dashed line in FIG. 1 Operation, the control box 2 can be rotated clockwise around the hinge pin 7, thus switching the power of the limit switch 5 to the off state, and can prevent the operating oil from being transferred to the working equipment due to the driving operation of the solenoid valve (not shown) supply.

Therefore, when the driver leaves the seat while the equipment is activated, if the driver erroneously manipulates or touches the control lever 1, the occurrence of safety accidents can be prevented by stopping the operation of the work equipment.

In addition, when the driver drives the work equipment in the state where the equipment is activated, assuming that the control box 2 is tilted, the driver uses the pressurizing handle 2a to press the control box 2 to return the control box 2 to the initial state (which means from Between the time when the tilted state represented by the dotted line in FIG. 1 and the initial state represented by the solid line is converted to the time when the locking device of the control box 2 is locked, the power supply of the limit switch 5 associated with the control lever 1 is turned on Pass state.

Therefore, if the control lever 1 is touched by the driver's error or due to unstable environmental factors when the driver is pressing the control box 2, it may cause the working equipment to move (for example, retract the working arm or open the working arm, and the equipment Rotation, etc.), which may damage the equipment or injure workers near the equipment, which may cause a major safety accident and cause personal and property losses.

Summary of the invention

Therefore, an object of the present invention is to provide a control joystick safety device for heavy equipment that can tilt the control box even when the driver erroneously manipulates or touches the joystick when the device is activated. In this case, the electric signal connected to the control lever is automatically cut off according to the tilting operation of the safety lever to prevent the working equipment from moving so that the driver can leave the seat.

Another object of the present invention is to provide a control joystick safety device for heavy equipment, which can choose to adjust the height of the joystick according to the requirements of the drivers body posture to provide convenience for the driver, and can pass even when driving When the operator works for a long time in the same posture, he can also make it work under the best operating conditions, thereby improving workability.

Another object of the present invention is to provide a control joystick safety device for heavy equipment, which, by combining the operation mode of the safety lever, can prevent the control caused by the change of the equipment type (wheel type or crawler type). Safety accidents that may be caused by misoperation of the lever.

In order to achieve the above object, a control joystick safety device for heavy equipment is provided, which includes: a control box that can be tilted on a side surface of a driver's seat and is suitable for manipulating a working device; A safety rod, which is rotatably fixed to a first support member on which the control box is fixed; a control box inclination adjustment rod rotatably fixed to the first support member; an operating switch assembly, the The assembly is fixed to the first support based on the linkage movement of the control box tilt adjustment rod, and the operation switch assembly supports the safety rod horizontally, and when the control box tilt adjustment rod is rotated, the safety rod is moved toward Tilt down to cut off the power supply of the first limit switch connected to the control rod; and a latch assembly, which is connected to a rod connected to a hinge according to the movement of the connecting rod, and so that one is fixed to The latch on the first support is detachably engaged with the second support in which the drivers seat is fixed. When the control box tilt adjustment lever is turned, the control box is tilted upward to cut off the connection with the control lever. Power supply for the second limit switch.

In addition, when at least one of the first and second limit switches is turned off, the supply of electrical signals to the control lever is turned off.

An elevating device suitable for elevating a control box includes: an operating shaft fixed on a bracket formed on the side surface of the second support member and having an adjusting knob formed at one end and a threaded portion on the outer surface; And a pair of connecting rods, these connecting rods are adapted to adjust the height of the control rod in such a way that each hinged connection part is engaged with the threaded part of the control shaft, and the rotation direction of the control shaft is around the central axis. The hinge shaft formed on the rear side of the second support member lifts and lowers the rotation shaft formed on the front side of the second support member.

The operating switch assembly includes: a first hinge, one end of which is hinged to the lower part of the control box tilt adjustment lever and fixed to a first support; a second hinge, one end of which is hinged to the first hinge The other end has an elongated hole at the other end; a locking shaft engaged with the elongated hole and connected to a joystick adapted to turn on and off the power supply of the first limit switch; and An elastic member supports the lock shaft so as to maintain the power supply of the first limit switch in an on state, and according to the elastic bias operation, maintains the safety lever in the initial state in a horizontal direction.

The latch assembly includes a first latch, which is hinged to the other end of a rod and rotatably fixed to a second support, in which a driver's seat is connected; a second latch , Which has a locking groove that is detachably engaged with the locking shaft fixed on the second support member, and the second latch is rotatably fixed to the second support member; an elastic member, the elastic member Make the second latch closely contact the outer surface of the first latch and, as an initial state, engage the locking groove with respect to the second latch according to an elastic biasing operation; and a gas spring fixed to the second support and On the first support, and when the control box tilt adjustment lever is rotated, according to the movement of the lever, the second latch is disengaged from the locking shaft, thereby disconnecting the power supply of the second limit switch.

In order to achieve the above-mentioned object of the present invention, a control joystick safety device for heavy equipment is provided, which includes: a control box installed on a side surface of the driver's seat and having a piece for manipulating a working device The control rod; a first limit switch connected to the control rod; a safety rod, which is rotatably fixed to a first support member that fixes the control box; a locking shaft, which is connected with a suitable Connected to a joystick that turns on and off the power supply of the first limit switch; and an elastic member that supports the lock shaft so as to keep the power supply of the first limit switch in the on state, and as an initial state, based on The elastic bias operation keeps the safety rod in the horizontal direction.

The operating switch assembly includes: a first hinge, one end of which is hinged to the lower part of the tilt adjustment lever of the control box; a second hinge which is hinged to the other end of the first hinge; and a splint, which is hinged to the second hinge The other end of the member and on one side thereof has a locking groove; a locking shaft that engages the locking groove and keeps a safety lever in a horizontal state; and an elastic member that engages the locking shaft to The groove is locked, and as an initial state, based on an elastic bias operation, the safety lever is maintained in a horizontal state, so that the power supply of the first limit switch is maintained in an on state.

The safety rod, the control box tilt adjustment rod, the operation switch assembly and the latch assembly are all fixed to an auxiliary support, which is rotatably fixed to the support connected to the driver's seat.

Description of the drawings

The present invention will be better understood with reference to the accompanying drawings. These drawings are only for illustration, and therefore should not constitute a limitation to the present invention. Among them: Figure 1 illustrates the use state of the safety bar connected to the control box in the prior art Figure 2 is a front view, which illustrates the state of engaging the control joystick safety device for heavy equipment according to the present invention; Figure 3 illustrates such a state that the control lever is used for heavy equipment of the present invention The possible manipulation of the control joystick safety device; Fig. 4 illustrates a state in which the control stick cannot be manipulated due to the rotation of the control box in the control joystick safety device for heavy equipment of the present invention.

Figure 5 is an enlarged view illustrating the driving part of a safety lever in the control joystick safety device for heavy equipment of the present invention; Figure 6 is a diagram illustrating another embodiment of the control for heavy equipment of the present invention A view of the joystick safety device; Figure 7 is a perspective view illustrating a lifting device that can lift a control box in the control joystick safety device for heavy equipment of the present invention; Figure 8 is an explanatory diagram 7 is an enlarged side view of the lifting device; Figures 9a and 9b are views illustrating the operating principle of the lifting device in Figure 7; Figure 10 is a diagram illustrating the operation of a control joystick safety device for heavy equipment according to another embodiment of the present invention Side view; FIG. 11 is a view illustrating the manipulation of a control joystick safety device for heavy equipment according to another embodiment of the present invention; and FIG. 12 is a view illustrating another embodiment of the present invention for the control joystick safety device for heavy equipment Side view of the device.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, the preferred embodiment of the present invention will be described with reference to the accompanying drawings.

As shown in Figures 2-9, the control joystick safety device for heavy equipment of the present invention includes: a control box 12, which can be tiltably installed on one side of the driver's seat 10 and has a control such as a crane The control rod 11 of the working equipment (not shown); a safety rod 13 rotatably fixed to the first support 23, and the control box 12 on the side of the entrance door of the cab is fixed to the first support A control box tilt adjustment lever 14, the adjustment lever is rotatably fixed to the first support 23; an operation switch assembly 17, the operation switch assembly is rotatably fixed to the first support 23 The upper hinge 15 is connected to move with the control box inclination adjustment rod 14 for connecting rod movement, and the operation switch assembly horizontally supports the safety rod 13, and when the control box inclination adjustment rod 14 is rotated, the safety rod 13 is moved downwards. Tilt to cut off the power supply of the first limit switch 16 connected to the control rod 11; and a latch assembly 22 which is connected to a rod 18 that moves with the hinge 15 for linkage, and is fixed to the first A latch 20 on the support 23 is detachably coupled to a second support 19 in which a driver's seat 10 is coupled. The control box 12 is tilted upward by turning the control box tilt adjustment lever 14 to cut off and The power supply of the second limit switch 21 connected to the control rod 11.

At this time, the operating switch assembly 17 includes: a first hinge 15a, one end of which is hinged to the lower part of the control box tilt adjustment lever 14 and the hinge is fixed to the first support 23; a second hinge 15c, which One end is hinged to the other end of the first hinge 15a and an elongated hole 15b is formed in the other end; a locking shaft 24 is engaged with the elongated hole 15b and is connected to a shaft suitable for connecting or disconnecting The operating lever 16a of the power supply of the first limit switch 16 is connected; and an elastic member 25 which supports the locking shaft 24 so as to keep the power supply of the first limit switch 16 in the on state and realize the level of the safety lever 13 The state is the elastic bias state as the initial state.

The latch assembly 22 includes: a first latch 20a hinged to the other end of the rod 18 and rotatably fixed to the second support 19; a second latch 20b, which has a detachable and Fixed to the locking groove 27 engaged with the locking shaft 26 on the second supporting member 19, and the second latch is rotatably fixed to the second supporting member 19; an elastic member 28, the elastic member to make the second latch The lock 20b is in close contact with the outer surface of the first latch 20a, and the locking groove 27 is elastically engaged with the locking shaft 26 as an initial state; and a gas spring 29 is rotatably hinged to the second support member 19 and the first support 23, and when the control box tilt adjustment lever 14 is rotated, the movement of the lever 18 disengages the second latch 20b from the lock shaft 26, and cuts off the power of the second limit switch 21.

The lifting device capable of lifting the control box 12 includes a manipulation shaft 52 fixed on a bracket 50 formed on the side surface of the second support 19, and the manipulation shaft is formed with a fixing knob 51 at one end thereof, A threaded portion is formed on its outer surface; and a pair of connecting rod members 55 and 56, wherein each of the hinged connection portions is engaged with the threaded portion of the manipulation shaft 52 so as to be formed on the second supporting member 19 as a central axis. The hinge shaft 53 on the rear side lifts and lowers the rotation shaft 54 formed at the front of the second support 19 and adjusts the height of the control box 12.

In the drawings, reference numeral 10a denotes a suspended seat in which a driver's seat 10 is connected.

Hereinafter, the operation of the control joystick safety device for heavy equipment of the present invention will be explained with reference to the accompanying drawings.

(a) In the following cases, that is, when the driver is sitting in the driver's seat of the equipment in which the control box can be tilted, a working equipment is driven by manipulating a control lever to perform work, as shown in Figure 3 When the latch assembly 22 is locked to the second support 19 and the safety lever 13 is maintained in the horizontal state shown by the solid line in the figure, the power supply of the first limit switch 16 engaged in the first support 23 Keep it on.

In addition, the second limit switch 21 connected to the second support 19 is maintained in the on state by a support generated by a manipulation board 40 for connecting the second limit switch 21 in the control box 20.

Since only when the first and second limit switches 16 and 21 maintain the power-on state, the electric signal will be sent to the control rod 11. Therefore, according to the above operating characteristics, the ideal safety can be achieved by driving the working equipment .

The heavy equipment is usually used in an airplane runway environment. Therefore, when there is a problem in operation of at least one of the first and second limit switches 16, or when the control box 12 is tilted so that the driver is out of the driver's seat, the control lever 11 can be cut off. The way of supplying electrical signals avoids safety accidents that may be caused by the actions of working equipment when the driver manipulates the control lever 11 or touches the control lever 11 by mistake.

(b) In the following situations, that is, the driver is sitting on or resting in the driver's seat while not operating the control lever in the driver's seat of the heavy equipment, the control box is tiltable in the heavy equipment, as shown in Figures 3 and 5 As shown, when the control box tilt adjustment lever 14 is pulled in the direction of the driver's seat 10 (pulled in the right direction in FIG. 3), the first connecting rod is hinged to the control box tilt adjustment lever 14 And the second hinge parts 15a and 15c make a link movement. In addition, by pressing the lock shaft 24 into the elongated hole 15b formed in the lower portion of the second hinge 15c, it moves in the downward direction in the elongated hole 15b.

At this time, the safety lever 13 rotates counterclockwise and moves in the descending direction shown by the dashed line in FIG. 3, and when the safety lever 13 rotates, it presses the operating lever 16a of the first limit switch 16 to automatically cut off the power. Therefore, the supply of electric signals to the control lever 11 can be cut off. In this way, even when the control lever 11 is manipulated, the work equipment cannot be manipulated.

Therefore, when the device is activated, when the driver is sitting in the driver's seat 10 without working or resting, the safety lever 13 is tilted in the descending direction. Therefore, even if the driver incorrectly manipulates or touches the control lever 11 At this time, it is also possible to prevent the working equipment from being driven, so that the safety of the equipment can be obtained.

(c) When the driver leaves the driver's seat while activating a device in which the control box can be tilted, as shown in Figures 3 and 4, when the control box tilt adjustment lever 14 is pulled in the direction of the driver's seat 10, Since the rod 18 is slightly lifted in the upward direction by the rotation of the first and second hinges 15a and 15c, the latch 20 connected to the lower side of the rod 18 is disengaged from the lock shaft 26 formed in the second support 19 .

Therefore, by the elastic force of the gas spring 29 fixed to the first supporting member 23 and the second supporting member 19, the control box 12 is rotated in the clockwise direction about the hinge shaft 53 as the central axis, so as to realize the shown in FIG. 4 Tilt operation.

Therefore, the supply of electrical signals to the control rod 11 is cut off in such a way that the second limit switch 21 connected in the second support 19 and the control panel 40 of the second limit switch 21 fixed to the control box 12 are separated from each other, Then the power of the second limit switch 21 is switched to the off state.

That is, when the driver is to leave the driver's seat 10 in a state where the device is activated, the control box 12 is tilted in the rearward direction of the driver's seat 10, and therefore, it is easy for the driver to enter. Even if the driver erroneously touches or manipulates the control lever 11 while the driver leaves or returns to the driver's seat 10, since the safety lever 13 is tilted in the descending direction, the work equipment cannot be driven even when the control lever 11 is manipulated.

Therefore, the driver can easily leave or return to the driver's seat 10 in a state where the device is activated.

When the driver returns to the driver's seat and starts working by manipulating the control lever 11 by returning the control box 12 to its original position, press the control box 12 in the counterclockwise direction around the hinge shaft 53 as the central axis, Return the control box 12 to its original position.

At this time, since the safety lever 13 is inclined in the descending direction, even if the driver erroneously touches the control lever 11 while pressing the control box 12, the supply of electrical signals to the control lever 11 is cut off, so that the work equipment can still be prevented from operating.

That is, even when the control box 12 is returned to the original position or restored, the control lever 11 can be kept in the power-off state in a state where the driver cannot lift the safety lever 13 in the horizontal direction.

As shown in Figures 7-9, in the control lever safety device for heavy equipment of the present invention, the control lever 11 can be selectively adjusted by tilting the control box 12 in the drivers direction according to the drivers posture. the height of.

As shown in Figure 9a, when the adjusting knob 51 is rotated in a clockwise direction, the pair of link members 55 and 56 screwed to the operating shaft 52 move in a leftward direction along the operating shaft 52. Therefore, around the hinge shaft 54 fixed to the second support 19 as the central axis, the control box 12 is raised by a height "A". Therefore, referring to the height of the hinge shaft 53 formed on the rear side of the second support 19, the lever 11 is lifted at a height "A".

In addition, as shown in FIG. 9B, when the adjustment knob 51 is rotated in the counterclockwise direction, since the pair of link members 55 and 56 screwed to the manipulation shaft 52 are moved in the inner direction along the manipulation shaft 52, Therefore, the control box 12 is lowered by the height "B" around the rotation shaft 54 fixed to the second support 19 as the central axis. Therefore, referring to the hinge shaft 53 formed on the rear side of the second support 19, the lever 11 can be lowered by the height "B".

As shown in FIG. 6, the control lever safety device for heavy equipment of the present invention is suitable for a heavy equipment in which a control box (not shown) is not tilted, and includes a control box installed on the driver's seat On both sides, there is a control rod suitable for operating the working equipment; a first limit switch 16 connected to the control rod; a safety rod 13 rotatably fixed to the first support 23, and enters in the cab The control box on the side of the door is fixed to the first supporting member; a locking shaft 26 connected to a joystick 16a for turning on or cutting off the power of the first limit switch 16; and an elastic member 25. The elastic member supports the locking shaft 26 so that the power of the first limit switch 16 is in an on state, so as to maintain the safety lever 13 in the horizontal direction as an initial state according to the elastic bias operation.

Therefore, when the driver leaves the driver's seat during work or the driver sits down with the device activated but is not working or the driver is resting, the driver tilts the safety bar 13 in the counterclockwise direction as shown by the dotted line in the figure. , So that when the safety lever 13 is tilted, the lever 16a of the first limit switch 16 is pressed by the rotation of the lock shaft 26. Therefore, by switching the power supply of the first limit switch 16 to the off state, the supply of the electric signal to the control lever can be cut off.

As shown in FIGS. 10 and 11, in another embodiment of the control lever safety device for heavy equipment of the present invention, the operation switch assembly 17 includes: a first hinge 15a, one end of which is hinged to the control box tilt adjustment lever The lower part of 14; a second hinge 15b, which is hinged to the other end of the first hinge 15a; a splint guide 15c, which is hinged to the other end of the second hinge 15b and is formed with a lock on one side Groove 15g; a locking shaft 15d connected to the locking groove 15g to keep the safety lever 13 in a horizontal state, and an elastic member 15e that keeps the safety lever 13 in a horizontal state for operation according to the elastic bias , In such a way that the locking shaft 15d is connected to the locking groove 15g, the power supply of the first limit switch 16 is maintained in the on state.

Therefore, when the control box tilt adjustment lever 14 is pulled in the right direction, the safety lever 13 rotates counterclockwise through the rotation of the splint 15c connected to the hinge 15b hinged to the control box tilt adjustment lever 14. The direction is rotated so as to cut off the supply of electrical signals to the control rod 11 by switching the power supply of the first limit switch 16 connected to the safety rod 13 to the off state.

When the safety lever 13 is tilted, when the control box tilt adjustment lever 14 is pulled slightly, the control box 12 can be tilted by the elastic force of the gas spring 25 when the latch 33 is disengaged from the lock shaft 33. The power supply of the second limit switch 21 is switched to the off state, and the supply of the electric signal to the control lever 11 is cut off.

That is, since the safety lever 13 is inclined and the control box 12 is inclined, even when the control lever 11 is manipulated, the work equipment cannot be driven.

At this time, due to the control box 12 with the control lever 11, the control box inclination adjustment lever 14 is adapted to cut off the power supply of the first limit switch 16 connected to the control lever 11 when the control box inclination adjustment lever 14 is tilted during rotation. The safety lever 13 is adapted to tilt the control box 12 in an upward direction according to the rotation of the control box tilt adjustment lever 14 to cut off the power supply of the second limit switch 21 connected to the control lever 11, and the latch assembly 22 and so on It is the same as the previous embodiment of the present invention, and therefore, the description of their structure and operation is omitted. In addition, the same components as in the previous embodiment of the present invention use the same reference numerals.

As shown in FIG. 12, according to another embodiment of the present invention, the lever safety device for heavy equipment is suitable for a device in which a control box (not shown) is not tilted. The safety lever 13, the control box tilt adjustment lever 14, the operating switch assembly 17 and the latch assembly 22 are all rotatably fixed to the support 19 connected to the driver's seat 10, and connected to a separate and rotating control box 12 On the auxiliary support 19. Since the structure and operation of these components are the same as in the embodiment of FIGS. 10 and 11, their description is omitted. In addition, the same components as in the previous embodiment of the present invention use the same reference numerals.

The joystick safety device for heavy equipment of the present invention has the following advantages.

When the driver tilts a control box to leave the drivers seat, the electrical signal connected to a control lever can be automatically cut off due to the tilting of the safety lever. Therefore, even if the driver makes a mistake in the state of starting the device Manipulating or touching the control lever can also prevent the work equipment from moving.

In addition, the height of the control lever that changes according to various postures of the driver can be selectively adjusted, thereby facilitating the driver. When the driver works for a long time in the same posture, the workability can be improved according to the most suitable environment.

In addition, regardless of the type of equipment, by adopting a safety lever operation method, it is possible to prevent safety accidents that may occur due to the driver's wrong operation of the control lever.

Since the present invention can be implemented in several ways without departing from the spirit or substantive characteristics of the present invention, it should be understood that the examples described above should not be limited to any of the details described above, and unless otherwise specifically limited, These examples should be interpreted broadly within the spirit and scope defined in the claims, and therefore all changes and improvements within the requirements and scope of the claims, or equivalent solutions to these requirements and scopes should be included in the claims.