JP2003278713A - Driver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a driver wherein a plurality of operating members are separately operated with only one driver. <P>SOLUTION: This driver is constituted of at least one driven body 2, 3 and a driving body 4 movably inserted into the driven body 2, 3. The driven body 2, 3 is movably inserted and arranged inside a support body 1 in the same direction as the driving body 4. When the driven body 2, 3 moves to a predetermined position together with the driving body 4 for the support body 1, the driven body 2, 3 and the support body 1 are integrated, and a restricting means is provided for allowing a move of the driving body 4 for the driven body 2, 3. The restricting means comprises restriction balls 5, 6 movably placed among the support body, the driven body and the driving body. A hydraulic circuit is constituted such that the pressure oil feed side is connected to both a piston side chamber and a rod side chamber within a predetermined section of the expansion stroke during expansion action of the hydraulic cylinder connected with the driving body 4. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive device capable of actuating at least two actuating members.

[0002]

2. Description of the Related Art Conventionally, for example, in the case of operating three long operating members separately in the longitudinal direction, expansion and contraction according to the number of the operating members, for example, as shown in Patent Document 1 Three actuating devices such as a cylinder are used, and each actuating member is actuated by driving these actuating devices respectively.

That is, it is possible to simultaneously operate the three actuating members by the same length by one driving device, but as described above, one actuating device is required to actuate the three operating members separately. It was not possible, and we had to use three drive devices.

[0004]

[Patent Document 1] JP-A-56-10806

[0005]

When a driving device is individually used for each actuating member as in the prior art described above, the driving device is expensive, so that the device cost rises and the size increases. The installation was sometimes restricted by space, which caused various obstacles.

The present invention has been made in view of the above problems, and an object of the present invention is to enable a plurality of operating members to be operated individually by a single drive device, and to shorten the operating time. It is an object of the present invention to provide a drive device that can be operated efficiently.

[0007]

According to a first aspect of the present invention, there is provided a drive device comprising at least one driven body and a drive body movably inserted in the driven body, the driven body being driven in the support body. It is movably inserted and arranged in the same direction as the body, and when the driven body moves to a predetermined position together with the drive body with respect to the support body, the driven body is integrated with the support body and the movement of the drive body relative to the driven body is prevented. The regulation means for permitting is provided.

According to a second aspect of the present invention, in the drive device, the restriction means includes a support body, a driven body, and a restriction ball provided so as to be movable between the drive bodies.

In the drive device of the invention according to claim 3, the drive body constitutes a part of the telescopic rod of the telescopic cylinder, or is connected to the telescopic rod of the telescopic cylinder.

According to a fourth aspect of the drive device of the present invention, the telescopic cylinder is a hydraulic cylinder, and when the hydraulic cylinder is telescopically operated, the pressure oil supply side is located in the piston side chamber and the rod side chamber in a predetermined section of its extension stroke. The hydraulic circuit is configured to communicate with both.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view showing the structure of the driving device of the present invention.

In FIG. 1, reference numeral 1 denotes a support body whose outer surface is fixed to a main body of an appropriate device, which is formed, for example, in a hollow cylindrical body. The 1 driven body 2 and the 2nd driven body 3 and the drive body 4 are provided, respectively.

A semicircular groove 11 is formed in an annular shape on the inner peripheral surface of the support 1 at a position substantially in the center in the longitudinal direction.

The first driven body 2 is a cylindrical body slidably fitted in the support body 1, and has an inner peripheral surface on one end side which is on the right side of the groove 11 in FIG. A semicircular groove 21 is formed in an annular shape at positions separated by a predetermined distance.

A flange 22 is formed at one end of the first driven member 2 so as to abut against one end surface of the support member 1.

The second driven body 3 is a cylindrical body slidably fitted in the first driven body 2, and the outer peripheral surface of the second driven body 3 is on the other end side on the left side of the groove 11 in FIG. A semicircular groove 31 is formed in an annular shape at a position separated by a predetermined distance.

A flange 32 is formed at one end of the second driven body 3 so as to come into contact with the end surface of the flange 22 of the first driven body 2 so as to be flush therewith.

The driving body 4 is a columnar body slidably fitted in the second driven body 3, and the groove 1 is formed on the outer peripheral surface thereof.
A semi-circular groove 41 is formed in an annular shape at the same position as 1.

A flange 42 is formed at one end of the driving body 4 so as to come into contact with the end surfaces of the flanges 22 and 32 of the first and second driven bodies 2 and 3 so as to be flush with each other.

The driving body 4 constitutes, for example, a part of the telescopic rod of the telescopic cylinder or is connected to the telescopic rod of the telescopic cylinder, and projects a predetermined length to the right in the axial direction from the state of FIG. It is configured to reciprocate in a range.

Further, in the first driven body 2 in the state of FIG. 1, a through hole 23 communicating from the inner peripheral surface to the outer peripheral surface is the same as the groove 31 at a position corresponding to the groove 31 of the second driven body 3. It is formed with a width.

Further, in the second driven body 3 in the state shown in FIG. 1, a through hole 33 communicating from the inner peripheral surface to the outer peripheral surface is formed at a position matching the groove 41 of the driving body 4 with the same width as the groove 41. Has been formed.

Then, the first restricting ball 5 extends over the groove 31 of the second driven body 3 and the through hole 23 of the first driven body 2 and the driving body 4.
The second regulation ball 6 is interposed between the groove 41 and the through hole 33 of the second driven body 3.

As shown in FIG. 2, the first restricting ball 5 is fitted and arranged in the groove 31 as shown in FIG. 1 to integrate the first driven body 2 and the second driven body 3 with each other. First follower 2
When the through hole 23 of is moved to the position of the groove 11 of the support 1, the first driven body 2 and the support 1 are integrated with each other by being inserted into the groove 11 so that the first driven body 2 and the support 1 are integrated. Body 2
The second follower 3 is allowed to move with respect to.

The second restricting ball 6 is fitted and arranged in the groove 41 as shown in FIG. 1, so that the second driven body 3 and the driving body 4 are integrated with each other, and as shown in FIG. When the through hole 33 of the driven body 3 moves to the position of the groove 21 of the first driven body 2, the second driven body 3 and the first driven body 2 are integrated by being inserted and arranged in the groove 21. In addition, the driving body 4 is allowed to move with respect to the second driven body 3.

That is, the diameters of the grooves 11, 31 and the first regulation ball 5 and the width of the through hole 23 are formed to be the same, and the diameters of the grooves 21, 41 and the second regulation ball 6 are In addition, the width of the through hole 33 is formed to be the same. In addition,
In the present embodiment, all are formed in the same size.

The first regulating ball 5, the groove 31, the through hole 23 and the groove 11 constitute one regulating means, and the second regulating ball 6, the groove 41, the through hole 33 and the groove 21 constitute one regulating means. I am configuring.

Next, the operation of the driving device thus constructed will be described.

First, the driving body 4 is extended from the state shown in FIG. 1 in the arrow P direction on the right side of the drawing. At this time, the first driven body 2 and the second driven body 3 are integrated by the first regulation ball 5, and the second driven body 3 and the drive body 4 are integrated by the second regulation ball 6, respectively. Along with the expansion of
Similarly, the first and second followers 2 and 3 extend with respect to the support 1.

By such an extension operation, the first follower 2
When the through hole 23 reaches the position where it coincides with the groove 11 of the support 1, the first regulation ball 5 is arranged in the groove 11 as shown in FIG. The movement of the first regulation ball 5 causes the first
The driven body 2 is integrated with the support body 1, and the first driven body 2 and the second driven body 3 are in a free state.

Therefore, when the driving body 4 is further extended in this state, the first driven body 2 does not extend and only the second driven body 3 extends with the driving body 4.

Subsequently, when the through hole 33 of the second driven body 3 reaches a position where it coincides with the groove 21 of the first driven body 2, the second regulating ball 6 is arranged in the groove 21 as shown in FIG. To be done.
By the movement of the second regulation ball 6, the second driven body 3 is moved to the first position.
While being integrated with the driven body 2, the second driven body 3 and the driving body 4 are in a free state.

Therefore, when the driving body 4 is further extended in this state, the second driven body 3 does not extend together with the first driven body 2 and only the driving body 4 extends as shown in FIG.

Thus, the first driven body 2, the second driven body 3,
The drive bodies 4 can be operated to extend different lengths.

That is, the first follower 2 has the groove 31 and the groove 11
The second driven body 3 extends by a length corresponding to the horizontal distance between
The groove 41 and the groove 21 in the horizontal distance between the groove 31 and the groove 11.
The length of the driving body 4 is increased by adding a horizontal distance between the driving body 4 and the second driven body 3 and a predetermined length by which the driving body 4 is extended with respect to the second driven body 3. The minutes will be extended.

In this embodiment, since the horizontal distance between the groove 31 and the groove 11 and the horizontal distance between the groove 41 and the groove 21 are the same, the moving distance of the second follower 3 is Support 1
It is twice the moving distance of the first driven body 2 with respect to.
In this way, by setting the horizontal distance between each groove appropriately,
The movement distances of the first driven body 2, the second driven body 3, and the driving body 4 can be adjusted according to the purpose.

Further, by retracting the driving body 4 from the state shown in FIG. 4, the flange 42 abuts the flange 32, and subsequently the flange 32 abuts the flange 22 in association with this retracting operation, and the first regulating ball 5 Also, the second regulation ball 6 moves in the opposite direction to the above, and by this action, the driving body 4, the second driven body 3, and the first driven body 2 are retracted as shown in FIG.

The support 1 may be integrated with the main body of the apparatus, and may be any member that supports the followers 2, 3 and the driving body 4.

By configuring the drive device in this way, it becomes possible to operate the three actuating members as follows, as shown in FIG. Note that, here, the first and second driven bodies 2 and 3 and the driving body 4 of the drive device are the second driven body 3 and
Is twice as long as the first driven body 2, and the driving body 4 is the first driven body 2
Shall be extended by 3 times.

As shown in FIG. 5, the first follower 2 has a first
The operating member 71 is the second operating member 72 on the second follower 3.
However, the third actuating member 73 is connected to the driving body 4, and the first to third actuating members 71 to 73 are formed as long members having the same length.

The first actuating member 71 is directly connected to the first driven member 2 via a connecting member 71a.

Permitting members 72b and 73b are provided at one ends of the second actuating member 72 and the third actuating member 73, respectively, and the permitting member 72b is connected to the second follower 3 via the connecting member 72a. In addition, the permitting member 73b is connected to the driving body 4 via the connecting member 73a.

The allowance member 72b is for holding the second actuating member 72 by the extension length of the first follower 2 without operating it, and the allowance member 73b is the extension length of the second follower 3. This is for holding the third operating member 73 by a certain amount without operating it. By interposing such permitting members 72b and 73b on the second and third actuating members 72 and 73, the first to third actuating members 71 to 73 are actuated as described below by the above-mentioned driving by the driving device. It will be.

First, as shown in FIG. 5, when the drive device is retracted, the first to third actuating members 71 to 73 are arranged in parallel at the same position. When the driving body 4 is extended in this state in the same manner as described above, first, only the first actuating member 71 moves in the arrow P direction on the right side of the drawing with the movement of the first driven body 2. At this time, the second and third actuating members 72, 73 are
It does not move due to the action of the allowance members 72b and 73b (see FIG. 6).

Further, when the driving body 4 is further extended from this position in the same manner as described above, only the second actuating member 72 becomes the first actuating member 71 via the permitting member 72b due to the extending operation of the second follower 3. Move in the same direction. At this time, the first actuating member 71 holds its position because the first follower 2 does not extend, and the third actuating member 73 does not move from its original position by the action of the allowance member 73b (see FIG. 7). .

Subsequently, when the driving body 4 is further extended from this position in the same manner as described above, only the third actuating member 73 is actuated by the extending operation of the driving body 4 via the permitting member 73b. It moves in the same direction as the members 71, 72. At this time, the first actuating member 71 holds its position because the first driven member 2 does not extend, and the second actuating member 72 also holds the second driven member 3.
Holds its position because it does not extend (see FIG. 8).

As a result, the first to third actuating members 71 to 73
Will sequentially move the same length in the order from the first to the third.

Next, from the state shown in FIG.
When the driven body 3 is retracted to the extended position, the third actuating member 73 does not move due to the action of the permitting member 73b and maintains the state in which it is arranged at that position (FIG. 9).
reference). Therefore, the first to third actuating members 71 to 73 do not move and are still in the state shown in FIG.

Subsequently, when the driving body 4 is retracted together with the second driven body 3 to the position where the first driven body 2 is extended, the second and third actuating members 72 and 73 are moved to the permitting member 72b.
By the action of 73b, the state of being arranged at that position is maintained without moving (see FIG. 10). Therefore the first
~ The third actuating members 71 to 73 do not move and are still in the state shown in Fig. 8.

Then, when the driving body 4 is further retracted together with the first and second driven bodies and is arranged in the original retracted position, all of the first to third actuating members 71 to 73 are simultaneously restored to the original position shown in FIG. Move to position.

Thus, the first to third actuating members 71 to 73 are
The same operation is performed by sequentially moving from the original position by the same length in the first to third order from the driving device, and then returning to the original position at the same time, and repeatedly driving the driving device described above. Can be repeated.

The connection of the first to third actuating members 71 to 73 is not limited to the above-described one, and for example, the first and second driven members 2, 3 and the driving member 4 are moved by a length corresponding to the driving stroke. You may do it.

The number of driven bodies is not limited to this, and may be one or a plurality of two or more.

By the way, the expansion / contraction operation of the driving body 4 as described above is performed by the expansion / contraction operation of the hydraulic cylinder (expansion / contraction cylinder) 8 by the hydraulic circuit shown in FIG. 11, whereby the first to third operation members 71 are operated. ~ 73 moves as described above.

FIG. 11 shows a hydraulic circuit for expanding and contracting the hydraulic cylinder.

In FIG. 11, P is a hydraulic pump, and the suction side of this hydraulic pump P communicates with the oil tank T. The discharge side of the hydraulic pump P is connected to the piston side chamber 8b side of the hydraulic cylinder 8 through the ON / OFF switching valve 82 and the expansion / contraction switching valve 83 by the piston side oil passage 81, and is switched ON / OFF by the rod side oil passage 84. The rod side chamber 8c is communicated with the valve 82, the expansion / conversion switching valve 83, and the speed increasing switching valve 85.

The ON-OFF switching valve 82 is a two-position switching valve and is in an OFF state in which the pressure oil from the hydraulic pump P is returned to the oil tank T from the piston side oil passage 81 side through the bypass passage 86 at the left position in FIG. Then, at the right position, an ON state in which the pressure oil from the hydraulic pump P is supplied to the piston-side oil passage 81 side is set, and the above-mentioned positions are switched by, for example, manual operation with a lever.

The expansion and contraction switching valve 83 is a two-position switching valve,
In FIG. 11, at the left position from the hydraulic pump P to the ON-O
The pressure oil supplied through the FF switching valve 82 is supplied from the piston side oil passage 81 side to the speed increasing switching valve 85 on the rod side oil passage 84 side, and supplied from the hydraulic pump P at the right position through the ON-OFF switching valve 82. The pressure oil thus supplied is supplied to the piston side chamber 8b through the piston side oil passage 81, and is switched to each of the above positions by, for example, excitation / demagnetization of a solenoid. And
The expansion / conversion switching valve 83 which is switched in this manner is adapted to retract the hydraulic cylinder 8 in the left position and extend the hydraulic cylinder 8 in the right position, as will be described later.

The speed increasing switching valve 85 is a two-position switching valve,
In FIG. 11, the rod side oil passage 84 is opened at the left position to communicate the rod side chamber 8c and the expansion / conversion switching valve 83, and at the right position the rod side chamber 8c is communicated to the piston side oil passage 81 side through the communication passage 87. It can be switched to each of the above positions by exciting / demagnetizing the solenoid. This speed increase switching valve 85 is
When the expansion / contraction stroke of the hydraulic cylinder 8 is S, the expansion / contraction rod 8a is switched to the right position when the section S1 is extended from the fully contracted state, and the extension operation in the section S2 and the contraction operation in the sections S2 and S1 are performed. It is sometimes arranged to switch to the left position. It should be noted that such switching of the speed increase switching valve 85 may be performed based on the detection result of the expansion / contraction operation of the hydraulic cylinder detected by the detection means such as a limit switch.

Reference numeral 88 in FIG. 11 is a relief valve.

Next, the expansion / contraction operation of the hydraulic cylinder by the hydraulic circuit configured as described above will be described.

First, when the ON-OFF switching valve 82, the expansion / compression switching valve 83 and the speed increasing switching valve 85 are arranged as shown in FIG. The pressure oil from the pump P is supplied to the piston side chamber 8b of the hydraulic cylinder 8 through the piston side oil passage 81, and the pressure oil of the rod side chamber 8c is returned to the oil tank T through the rod side oil passage 84, whereby the hydraulic cylinder 8 is extended. Then, by switching the expansion / contraction switching valve 83 from the right position to the left position in this state, the pressure oil from the hydraulic pump P is supplied from the expansion / compression switching valve 83 to the rod side chamber 8c through the rod side oil passage 84, and the piston The pressure oil in the side oil passage 81 is returned to the oil tank T from the expansion / conversion switching valve 83, whereby the hydraulic cylinder 8 is contracted.

When the hydraulic cylinder 8 is expanded and contracted as described above, when the hydraulic cylinder 8 is expanded from the fully contracted state in the section S1, the speed increasing switching valve 85 is switched from the left position to the right position. By the switching of the speed increasing switching valve 85, the piston side chamber 8b and the rod side chamber 8c of the hydraulic cylinder 8 are connected to each other through the piston side oil passage 81 and the communication passage 87, which is a so-called ram state, whereby the hydraulic cylinder 8 is described above. The extension operation is faster than the normal extension / contraction operation.
That is, the extension operation in the section S1 is accelerated and becomes faster than the other extension / contraction operations, and thus the time required for one extension / contraction can be shortened.

Therefore, by controlling the expansion / contraction operation of the hydraulic cylinder 8 as described above, the driving body 4 connected to the hydraulic cylinder 8 is also expanded / contracted in the same manner to move the first to third operation members 71-73. I will let you.

Specifically, for example, when the hydraulic cylinder 8 is extended in the section S1, the drive unit 4 is extended in advance from the state shown in FIG. 5 to the state shown in FIG.
Is set. This accelerates the movement of the driving body 4 from the position shown in FIG. 5 to the position shown in FIG. As a result, the speed at which the first operating member 71 and the second operating member 72 move in the arrow P direction can be made faster than the speed at which the first to third operating members 71 to 73 move in addition to this. As a result, the time required for one cycle of movement of the first to third actuating members 71 to 73 from the original position and returning to the original position as described above can be shortened.

[0067]

As described above, according to the driving apparatus of the present invention, the movement of the driven body with respect to the support body by the regulating means,
Also, by restricting the movement of the driving body with respect to the driven body,
By driving one driving body, the driving body and the driven body can be driven in different states, and thereby a plurality of operating members connected to the driving body and the driven body can be individually actuated by one driving device. Will be possible.

Further, when the hydraulic cylinder for driving the driving body is expanded / contracted, the hydraulic circuit is configured so that the pressure oil supply side communicates with both the piston side chamber and the rod side chamber in a predetermined section of its extension stroke. The extension operation in this section can be accelerated, whereby the operation time can be shortened and the drive body can be operated efficiently.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a configuration of a drive device of the present invention.

FIG. 2 is a cross-sectional view illustrating the operation of the driving device.

FIG. 3 is a cross-sectional view illustrating the operation of the drive device.

FIG. 4 is a cross-sectional view illustrating the operation of the drive device.

FIG. 5 is a schematic view showing an example of an operation member operated by a drive device.

FIG. 6 is a schematic view for explaining the operation of the operation member operated by the drive device.

FIG. 7 is a schematic diagram illustrating the operation of an operating member operated by a drive device.

FIG. 8 is a schematic diagram illustrating the operation of an operating member operated by a drive device.

FIG. 9 is a schematic view for explaining the operation of the operation member operated by the drive device.

FIG. 10 is a schematic diagram illustrating the operation of the operating member operated by the drive device.

FIG. 11 is a hydraulic circuit diagram for expanding and contracting a hydraulic cylinder that drives a driving body.

[Explanation of symbols]

1 support 11 grooves 2 First follower 21 groove 23 through holes 3 Second follower 31 groove 33 through holes 4 driver 41 groove 5 first regulation ball 6 second regulation ball 8 hydraulic cylinders 8a Telescopic rod 8b Piston side chamber 8c Rod side chamber

Claims (4)

[Claims] 1. At least one driven body and a driving body movably inserted into the driven body, wherein the driven body is movably inserted in the support body in the same direction as the driving body, and is arranged in the support body. On the other hand, when the driven body moves together with the driving body to a predetermined position, the driven body is integrated with the support body, and a restricting means for allowing the movement of the driven body with respect to the driven body is provided. . 2. The drive device according to claim 1, wherein the restricting means comprises a restricting ball provided so as to be movable among the support, the driven member, and the driving member. 3. The drive device according to claim 1, wherein the driving body constitutes a part of a telescopic rod of the telescopic cylinder or is connected to the telescopic rod of the telescopic cylinder. 4. The expansion / contraction cylinder is a hydraulic cylinder, and when the expansion / contraction operation of the hydraulic cylinder is performed, the expansion / contraction cylinder is hydraulically operated so that the pressure oil supply side communicates with both the piston side chamber and the rod side chamber in a predetermined section of its extension stroke. The drive device according to claim 3, wherein a circuit is configured.