JP3818548B2 - Reversible lever device with switch interlocking mechanism - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a lever device that can easily change the rotation direction of a relay lever by reversing attachment of some constituent members, and includes a switch interlocking mechanism.
[0002]
[Prior art]
For example, as is well known, a loading platform tilting mechanism in a dump truck or the like operates a power lever (hereinafter referred to as PTO) via a control cable or a rod by operating an operation lever provided in a driver's cab and a hydraulic pump. , Thereby extending the hydraulic cylinder attached to the bottom surface of the loading platform to incline the loading platform. T.A. O format, P.I. T.A. When using the operation method of O and the type of actuator, it is necessary to select whether to operate by pulling the control cable or rod, or by pushing the control cable or rod.
In this case, for the sake of space and safety in the cab, the operation lever stands along the side of the instrument panel of the cab when the pallet is not tilted, and protrudes into the cab only when the pallet is tilted. For this reason, the rotation direction of the operating lever is always pulled regardless of whether the control cable or the rod is pushed or pulled, so that the operation lever is tilted from the side of the instrument panel and protrudes into the driver's cab. It is desirable to keep it in the correct direction.
[0003]
For this reason, in general, components have been changed depending on whether the control cable is pulled or pushed by turning the operation lever.
That is, in the former case, one end of the control cable is connected to the tip of a drive lever that is rotatably supported integrally with the lower end of the operation lever, and the other end is connected to P.22. T.A. O. etc. is used, and by pulling the cable through the drive lever by pulling the operating lever forward, P.P. T.A. O was activated.
In the latter case, the drive lever is supported at the lower end of the operation lever so as to be integrally rotatable. T.A. The relay lever and the power transmission lever are supported a little apart on the O side, the relay lever tip and the drive lever tip are connected by a connecting rod, and one end of the control cable is connected to the power transmission lever tip, and the other end P. T.A. O, etc. are used, and the relay lever and power lever are rotated in the opposite direction to the drive lever via the drive lever and connecting rod by tilting the operation lever toward the front, and the cable is pushed to turn the P.P. T.A. O was activated.
However, both of the above-mentioned means have to prepare different parts regardless of the difference in the pushing and pulling operations of the mere control cable, and in particular, there is a problem that the management cost of the parts becomes high. The mounting space is not constant, resulting in wasteful placement of other parts.
[0004]
Therefore, with the aim of being able to share parts except for a few parts even for differences in pushing and pulling operations such as control cables, etc., this can reduce the management cost of parts and make the space constant, The lever device shown in FIG. 10 and below has been devised and put into practical use.
That is, the one shown in FIGS. 10 to 12 is the above-described P.P. T.A. The relay lever 3 connected to O or the like is brought close to each other so as to be rotatable by the shafts 2a and 3a. The drive lever 2 and the relay lever 3 have a triangular shape including the rotation centers 2a and 3a, respectively. The two connection holes 2b, 2c and 3b, 3c are opened at a predetermined distance from the rotation centers 2a and 3a, and the two connection holes 3b and 3c are formed according to the rotation direction of the relay lever 3. One and the connecting holes 2b, 2c of the drive lever 2 are selectively connected by connecting rods 4 or 4 '. When the control cable or the like C is pushed, the same direction as the drive lever 2 is used. In order to rotate the relay lever 3, the connecting lever 2b of the drive lever 2 and the connecting hole 3b of the relay lever 3 are rotatably connected by a long connecting rod 4 as shown in FIG. The drive lever 2 is When rotating in the clockwise direction, the relay lever 3 is rotated in the clockwise direction via the connecting rod 4, and the control cable or the like C is pushed through the hole 3d of the relay lever 3.
[0005]
When pulling the control cable C or the like, the relay lever 3 is rotated counterclockwise, so that the connecting hole 2c of the drive lever 2 and the connecting hole 3c of the relay lever 3 as shown in FIG. When the drive lever 2 is rotated clockwise by the operation lever 1 by rotating the connecting rod 4 ′ so as to be rotatable, the relay lever 3 is rotated counterclockwise via the connecting rod 4. Then, the control cable etc. C is pulled through the hole 3d of the relay lever 3.
In FIG. 10, reference numeral 5 denotes a transmission link, one end of which is connected to the hole 2d of the drive lever 2 and the other end is bent at a right angle to detect the completion of the operation of the operation lever 1 disposed on the support member B. The switch 6 is opposed to the switch 6 and abuts when the operation lever 1 is not operated to turn off the switch 6.
[0006]
FIG. 13 and the following figures show the above-described P.P. T.A. The relay lever 8 connected to O or the like is brought close to each other so as to be rotatable by the respective shafts 7a and 8a, and the drive lever 7 rolls in a square guide hole B ′ formed in the support member B. The roller 9 is supported, and the relay lever 8 supports the roller 10 on the shaft 8a, and the pins 8b and 8c are set apart from each other by a predetermined distance across the shaft 8a. Further, the relay lever 8 and the relay lever 8 are relayed. The lever 8 is connected to the following connecting plates 11, 11 ′, that is, one end is attached to the shaft 9 a of the roller 9 of the drive lever 7, and an elliptical guide hole 11 a, 11 ′ a that engages with the roller 10 at the center. And a recess 11b or 11'b that engages with the pin 8b or 8c, and the other end of the connecting plate 11 supported by the pin shaft 12 fixed to the support member B via the guide small holes 11c and 11'c. , 11 'connected A.
In FIG. 13 and subsequent figures, reference numeral 6 denotes a detection switch disposed on the support member B for detecting the completion of the operation of the operation lever 1, and an extension formed at a right angle on the side opposite to the operation lever 1 of the connecting plates 11, 11 ′. It is made to oppose part 11d, 11'd, and when the said operation lever 1 is not operated, it contact | abuts like FIG. 13, FIG.
[0007]
When pushing the control cable or the like, the connecting lever 11 having a recess 11b that engages with the pin 8b of the relay lever 8 as shown in FIG. When the drive lever 7 is rotated clockwise by the operation lever 1 by using the connecting plate 11 via the shaft 9a of the roller 9 that rolls in the corner guide hole B ′, the elliptical guide hole 11a is provided. Guided by the roller 10, and the guide small hole 11c is guided by the pin shaft 12 and moves to the left as shown in FIG. 14. At this time, the relay lever 8 is rotated clockwise through the pin 8b by the recess 11b. An operation of pushing a control cable or the like through the hole 8c of the relay lever 8 is performed.
[0008]
Further, when pulling the control cable or the like, the relay lever 8 is rotated in the counterclockwise direction, so that a connecting plate having a recess 11'b that engages with the pin 8c of the relay lever 8 as shown in FIG. When the drive lever 7 is rotated clockwise by the operation lever 1 by using 11 ', the connecting plate 11' is connected via the shaft 9a of the roller 9 that rolls in the corner guide hole B 'as described above. The oval guide hole 11′a is guided by the roller 10 and the guide small hole 11′c is guided by the pin shaft 12 and moves to the left as shown in FIG. 16. At this time, the recess 11′b passes through the pin 8c. Thus, the relay lever 8 is rotated counterclockwise, and an operation of pulling the control cable or the like through the hole 8c of the relay lever 8 is performed.
[0009]
[Problems to be solved by the invention]
However, even in the parts shown in FIG. 10 and below, some parts must be prepared in accordance with the pushing and pulling of the control cable or the like, which is wasteful in terms of cost and management. That is, the one shown in FIGS. 10 to 12 requires the long connecting rod 4 and the short connecting rod 4 ′ in accordance with the pushing and pulling of the control cable or the like, and the one shown in FIGS. It was necessary to prepare two types of connecting plates 11 and 11 ′ in accordance with pushing and pulling.
Further, in the case shown in FIG. 10 and subsequent figures, even when the long connecting rod 4 and the short connecting rod 4 ′ or the connecting plates 11 and 11 ′ are erroneously attached differently from the request for pushing and pulling the control cable or the like, However, there was a problem that an error could not be found and it was discovered for the first time in the final inspection process and had to be exchanged with great effort and cost.
The present invention has been devised as an object to solve the above-mentioned problems, and it is possible to invert and share some parts for the difference in pushing and pulling operation of the control cable, etc. It is an object of the present invention to provide a reversible lever device having a switch interlocking mechanism that can reduce the cost of the device and the management cost of parts, and that can prevent erroneous attachment of the connecting rod or the like using the switch interlocking mechanism .
[0010]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, a plate-like drive lever that is rotated by an operation lever and a relay lever that is connected to an actuated device are arranged on a support member so as to be rotatable and close to each other. The relay lever is provided with two connecting portions at a predetermined distance on both sides across the rotation center, and a connecting rod between the two connecting portions and the connecting portion of the driving lever is provided. While selectively connecting according to the rotation direction of the relay lever, an extension is formed on the relay lever side of the connecting rod, and the extension is positioned after the relay lever is actuated by the operation lever. The present invention relates to a reversible moving lever device having a switch interlocking mechanism characterized in that a detection switch mounting portion for detecting completion of operation of the operation lever is provided at a location .
[0011]
[Operation]
When the reversible lever device having the switch interlocking mechanism of the present invention having the above-described structure is assembled, the operation lever and the drive lever are first attached to the support member, and the relay lever is attached to the support member close to the drive lever. Then, when the relay lever is rotated clockwise, that is, when the control cable or the like is pushed, one end of the connecting rod is attached to one of the pin shafts of the driving lever and the connecting hole is connected to the relay lever. The drive lever and the relay lever are connected to each other by being fitted to the pin shaft described later. Here, when the detection switch is mounted by a non-regular mounting hole, the detection switch and the extension portion of the connecting rod interfere with each other so that the detection switch cannot be mounted, and it is found that the assembly is incorrect and can be corrected normally immediately.
When the drive lever is rotated clockwise with the operation lever, the relay lever is rotated clockwise via the connecting rod, and the control cable is connected via the relay lever. Perform the push action.
[0012]
When pulling the relay lever counterclockwise, that is, when pulling the control cable, etc., one end of the connecting rod is attached to the pin shaft of the drive lever, and the connection hole is connected to the pin shaft of the relay lever. The drive lever and the relay lever are connected to each other. Here, when the detection switch is mounted by a non-regular mounting hole, the detection switch and the extension portion of the connecting rod interfere with each other so that the detection switch cannot be mounted, and it is found that the assembly is incorrect and can be corrected normally immediately.
When the drive lever is rotated clockwise with the operation lever, the relay lever is rotated counterclockwise via the connecting rod and the control cable or the like is connected via the relay lever. The operation which pulls is performed.
[0013]
【Example】
In the following, an embodiment of the present invention is shown in FIG. 1 to FIG. 1 in which the symbols common to FIG. 10 and subsequent figures represent the same parts, and the reversible lever device 20 of the present invention is applied to a loading platform tilting operation device in a dump truck as described above. FIG. 9 will be described in detail.
The reversible lever device 20 provided with the switch interlocking mechanism of the present invention has the above described P.P. T.A. The relay lever 22 connected to O or the like is brought close to each other so as to be rotatable by shafts 21a and 22a, and the drive lever 21 protrudes through a square guide hole B ′ formed in the support member B. The pin shaft 21b and the relay lever 22 are set up with pin shafts 22b and 22c at a predetermined distance on both sides of the shaft 22a. Further, the drive lever 21 and the relay lever 22 are connected as follows. The connection rod 23 having a U-shape, that is, one end of the connection rod 23 can be attached to the pin shaft 21b of the drive lever 21, and a connection hole 23a for selectively fitting with the pin shaft 22b or 22c at the center thereof, Moreover, it connects with the connection rod 23 in which the extension part 23b was each formed in the other end.
[0014]
6 is a detection switch for detecting the completion of the operation of the operation lever 1 as described above, and is located at the position of the extension 23b of the connecting rod 23 after the operation of the operation lever 1 according to the turning direction of the relay lever 22. The mounting holes 6a and 6b are disposed on the support member so that they can be mounted. The mounting holes 6a and 6b face the side of the relay lever 22, and when the detection switch 6 is normally disposed, When the lever 1 is not operated, as shown in FIGS. 1 and 4, the switch 6 is turned off.
[0015]
In assembling the reversible lever device 20 having the switch interlocking mechanism of the present invention having the above-described configuration, first, the operating lever 1 and the driving lever 21 are attached to the support member B, and the relay lever 22 is brought close to the driving lever 21. Then, when attaching the relay lever 22 in the clockwise direction, that is, when pressing the control cable C, one end of the connecting rod 23 is connected to the pin shaft of the drive lever 21 as shown in FIG. At the same time, the connecting hole 23a is fitted into the pin shaft 22b of the relay lever 22, and the driving lever 21 and the relay lever 22 are connected so that the extension 23b faces inward. In the above case, the detection switch 6 is normally attached by the attachment hole 6b as shown in FIG. 1. However, when the detection switch 6 is attached by the attachment hole 6a as shown in FIG. 3, the detection switch 6 is attached. 6 and the extension 23b of the connecting rod 23 interfere with each other so that the detection switch 6 cannot be attached, and it is found that the assembly is incorrect. On the contrary, when the extension part 23b of the connecting rod 23 interferes regardless of whether the detection switch 6 is attached by the regular attachment hole 6b, it is understood that the connecting rod 23 is erroneously assembled. In any case, it can be corrected normally immediately.
When the drive lever 21 is rotated clockwise with the operation lever 1 as shown in FIG. 2, the relay lever 22 is rotated clockwise via the connecting rod 23 in the assembled assembly. An operation of pushing the control cable C through the hole 22d of the relay lever 22 is performed.
[0016]
When the relay lever 22 is rotated counterclockwise, that is, when the control cable C is pulled, one end of the connecting rod 23 is attached to the pin shaft 21b of the driving lever 21 as shown in FIG. The driving lever 21 and the relay lever 22 are connected so that the hole 23a is fitted into the pin shaft 22c of the relay lever 22 and the extension 23b faces inward. Further, in the above case, the detection switch 6 is normally attached through the attachment hole 6a as shown in FIG. 4, but here, as shown in FIG. 6, when the detection switch 6 is attached through the attachment hole 6b, the detection switch 6 is attached. 6 and the extension 23b of the connecting rod 23 interfere with each other so that the detection switch 6 cannot be attached, and it is found that the assembly is incorrect. On the contrary, when the extension part 23b of the connecting rod 23 interferes regardless of whether the detection switch 6 is attached by the regular attaching hole 6a, it is understood that the connecting rod 23 is erroneously assembled. In any case, it can be corrected normally immediately.
When the drive lever 21 is rotated clockwise by the operation lever 1 as shown in FIG. 5, the relay lever 22 is rotated clockwise via the connecting rod 23 in the assembly that is properly assembled. An operation of pulling the control cable C through the hole 22d of the relay lever 22 is performed.
[0017]
【The invention's effect】
As described above, in the reversible lever device having the switch interlocking mechanism of the present invention, the plate-like drive lever that is rotated by the operation lever and the relay lever that is connected to the actuated device can be rotated on the support member. The relay lever is provided with two connecting portions on both sides of the rotation center with a predetermined distance between the two connecting portions and the connecting portion of the driving lever. The connecting rod is selectively connected according to the rotation direction of the relay lever, while an extension portion is formed on the relay lever side of the connecting rod and the relay lever is operated by the operation lever. the point where the extension later positioned, so characterized in that a mounting portion of the detection switch for detecting the operation completion of the operating lever, pushing such control cable 1 against differences in pull operation You can share the connection rod, thereby reducing the cost of the apparatus, the management costs of the parts, assembling is facilitated. In addition, the present invention has an effect of preventing erroneous assembly.
[0018]
[Brief description of the drawings]
FIG. 1 is a front view of a loading platform tilting control device in a dump truck equipped with a reversible lever device equipped with a switch interlocking mechanism of the present invention that performs a pushing operation, and shows a non-operating state. FIG. FIG. 3 is a front view of a control device for tilting a loading platform in a dump truck equipped with a reversible lever device equipped with an invention switch interlocking mechanism. FIG. 3 shows a reversible lever with a switch interlocking mechanism of the present invention for pushing operation. FIG. 4 is a front view of the control device for tilting the loading platform in the dump truck equipped with the device, and shows an erroneous assembly time. FIG. 4 FIG. 5 is a front view of the control device, showing a non-operating state. FIG. FIG. 6 is a front view of the control device for tilting the loading platform in the puka, and shows an operation time. FIG. FIG. 7 is a front view of the embodiment of the reversible lever device according to the present invention when the rotation directions of the driving lever and the relay lever are the same. FIG. 9 is a front view of the lever device according to the embodiment when the driving lever and the relay lever are rotated in different directions. FIG. 10 is a front view of a control device for tilting a cargo bed in a dump truck equipped with a conventional lever device and a switch interlocking mechanism thereof, showing a non-operation state. 11 is a front view of the conventional lever device when the driving lever and the relay lever are rotated in the same direction. FIG. 12 is different in the rotating direction of the driving lever and the relay lever in the conventional lever device. FIG. 13 is a front view of a control apparatus for tilting a loading platform in a dump truck equipped with a conventional lever device that performs a pushing operation and a switch interlocking mechanism thereof. FIG. 14 shows a non-operating state. FIG. 15 is a front view of a control device for tilting a loading platform in a dump truck equipped with a conventional lever device and its switch interlocking mechanism. FIG. 15 shows a conventional lever device for pulling operation and its switch interlocking mechanism. FIG. 16 is a front view of a loading platform tilting control device in a dump truck, showing a non-operating state. FIG. 16 shows a conventional lever device for pulling operation and its switch connection. It is a front view of the control device for loading platform tilting in a dump truck, which is provided with a moving mechanism, and shows when in operation.
DESCRIPTION OF SYMBOLS 1 Operation lever 2,7 Drive lever 3,8 Relay lever 4,4 'Connecting rod 5 Transmission link 6 Detection switch 9,10 Roller 11,11' Connecting plate 20 This invention reversible-motion lever apparatus 21 Drive lever 22 Relay lever 23 Connecting rod B Support member B 'Square guide hole C Control cable or the like.

Claims (1)

A plate-like driving lever that is rotated by an operation lever and a relay lever that is connected to the actuated device are arranged on the support member so as to be rotatable and close to each other. Two connecting portions are provided on both sides of the center with a predetermined distance between each other, and a connecting rod is provided between the two connecting portions and the connecting portion of the driving lever according to the rotation direction of the relay lever. While selectively connecting, an extension portion is formed on the relay lever side of the connecting rod, and the operation lever operation completion is detected at a position where the extension portion is located after the relay lever is operated by the operation lever. A reversible lever device having a switch interlocking mechanism, characterized in that a mounting portion for a detection switch is provided.

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