JP2014052005A - Engagement chain type forwarding or backing operation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an engagement chain type forwarding or backing operation device having a forwarding or backing guide mechanism for stably guiding an engagement part of an engagement chain.SOLUTION: There is provided an engagement chain type forwarding or backing operation device 100 in which a forwarding or backing guide mechanism 130 has a plurality of slide parts (131, 132, 133) arranged in a parallel direction T to be slidable relatively in a forwarding or backing direction S, a backing side end slide part 131 acting as a forwarding or backing direction saving side end of a plurality of slide parts under a state in which the forwarding or backing guide mechanism is extended in a forwarding or backing direction is relatively fixed with respect to a base 120; a forwarding side end slide part 132 acting as a forwarding or backing direction advance side end of a plurality of slide parts under a state in which the forwarding or backing guide mechanism is extended in a forwarding or backing direction is arranged in the parallel direction T and at a side where it approaches closer to an engagement chain 140 than the backing side end slide part 131; and the forwarding side end slide part 132 is connected to an operated body 110 or a forwarding side of an engagement part 140G of the engagement chain 140 in a forwarding or backing direction, and relatively fixed with respect to the forwarding side in a forwarding or backing direction of the engagement part 140G.

Description

  The present invention is used in manufacturing equipment in various manufacturing fields, transport equipment in the transport field, nursing care equipment in the medical and welfare field, stage equipment in the art field, etc. Relates to the device.

  Conventionally, a pair of meshing chains that transmit power to an actuated body to advance and retract the actuated body, and an advance / retreat guide mechanism that expands and contracts in the advance / retreat direction of the actuated body to guide the actuated body in the advance / retreat direction An articulated chain type advance / retreat operation device having the above is known (for example, Patent Document 1 to Patent Document 3).

The advance / retreat guide mechanism of the conventional interlocking chain type advance / retreat operation device described in Patent Document 1 has a so-called multistage pantograph structure in which a plurality of X-shaped swingable arms are connected in the advance / retreat direction. It was.
And one end of the advancing / retreating direction of the multistage pantograph is connected to the base, and the other end is connected to a lifting table as an actuated body.

Further, the advance / retreat guide mechanism of the meshing chain type advance / retreat operation device according to the second aspect described in Patent Document 2 includes a single long guide pole extending in the advance / retreat direction, and a tip side of the meshing chain. It had a pair of guide rollers provided on the lifting table as an attached actuated body.
And a pair of guide roller was comprised so that it might move to an advance / retreat direction, pinching | interposing a guide pole.

Further, the advance / retreat guide mechanism of the conventional interlocking chain type advance / retreat operation device described in Patent Document 3 has a swingable bending arm.
Then, one end of the bending arm is connected to the base, and the other end is connected to a lifting table as an actuated body.

JP 2009-001377 A JP 2011-111314 A JP 2012-001360 A

  However, since the advance / retreat guide mechanism of the above-described conventional chain-type advance / retreat operation device of the first aspect described above has a multi-stage pantograph structure, there are many places where the arm is swingably connected, and the influence of play at this place is large. When the advancing / retreating direction is a horizontal direction, there is a problem that the pantograph is hung down so that the advancing / retreating direction advance side of the pantograph is bowed down and the driven body cannot be stably guided.

  Further, the advance / retreat guide mechanism of the above-mentioned conventional chained chain advance / retreat operation device of the second aspect described above has a structure in which the pair of guide rollers move in the advance / retreat direction while holding the guide poles, so that there is a problem such as interference between the guide rollers. There is a problem that the actuated body cannot be stably guided due to the occurrence of the problem, and there is a problem that the structure is enlarged because the guide pole needs to be long in the forward and backward direction by the stroke of the actuated body.

  Further, since the advance / retreat guide mechanism of the conventional interlocking chain type advance / retreat operation device of the third aspect described above has a structure that has a swingable bending arm, there is an influence of backlash at a place where the arm is swingably connected. There has been a problem that it becomes large due to the long arm and the driven body cannot be stably guided.

Therefore, in order to eliminate the pivotally connected portion of the arm and eliminate the guide pole, for example, the configuration of the meshing chain type advance / retreat operation device 700 shown in FIGS. 9A and 9B can be considered. .
Here, FIG. 9A is a side view showing when the meshing chain type advance / retreat operation device 700 which is a problem in the present application is retracted, and FIG. 9B is a meshing chain type advance / retreat operation device which is a problem in the present application. It is a side view which shows the time of 700 advance.

As shown in FIGS. 9A and 9B, the meshing chain type advance / retreat operation device 700 which is a problem in the present application is expanded and contracted in the advance / retreat direction S of the actuated body 710 to move the actuated body 710 to the base 720. On the other hand, it has an advance / retreat guide mechanism 730 that guides in the advance / retreat direction S and a pair of meshing chains that transmit the power of a drive motor (not shown) to the actuated body 710 to advance and retract the actuated body 710.
The base 720 includes a pair of chain storage portions 721 that store the disengagement portions of the meshing chain and a pair of drive sprockets (not shown) that transmit the power of the drive motor to the meshing chain.

On the other hand, the advance / retreat guide mechanism 730 has a so-called cylindrical telescopic structure, and includes a first cylinder portion 731, a second cylinder portion 732, a third cylinder portion 733, and a fourth cylinder portion 734. .
The fourth cylinder part 734 is slidable so as to enter and exit the inside of the third cylinder part 733, and the third cylinder part 733 is slidable so as to enter and exit the inside of the second cylinder part 732, The cylinder part 732 is slidable so as to enter and exit the first cylinder part 731.
Further, the first cylinder portion 731 is fixed relatively to the base 720.

Then, as shown in FIG. 9A, in a state where the meshing portion 740G of the meshing chain moves to the retracting side in the forward / backward direction, the second cylindrical portion 732 to the fourth cylindrical portion 734 enter the first cylindrical portion 731. Therefore, the advance / retreat guide mechanism 730 becomes compact in the advance / retreat direction S.
On the other hand, as shown in FIG. 9B, when the meshing portion 740G of the meshing chain moves to the advance side in the advance / retreat direction, the first cylinder part 731, the second cylinder part 732, The forward / backward guide mechanism 730 extends in the forward / backward direction S so that the third cylindrical portion 733 and the fourth cylindrical portion 734 are arranged in this order.

However, because of the cylindrical telescopic structure, when the meshing portion 740G of the meshing chain moves from the position of FIG. 9A to the position of FIG. 9B, the advance / retreat guide mechanism 730 and the meshing portion 740G of the meshing chain The interval changes.
Specifically, in the state of FIG. 9A, the distance between the advance / retreat guide mechanism 730 and the meshing portion 740G of the meshing chain is the distance between the first tube portion 731 and the advancing side of the meshing portion 740G of the meshing chain. 9B, in the state of FIG. 9B, the distance between the advance / retreat guide mechanism 730 and the meshing portion 740G of the meshing chain is between the fourth cylindrical portion 734 and the advancing side of the meshing portion 740G of the meshing chain. It changes to interval L2.
As a result, the load resistance against the load received by the advancing side end of the meshing portion 740G of the meshing chain from the conveyed product changes, and the meshing portion 740G of the meshing chain and the actuated body 710 cannot be stably guided. is there.

  Accordingly, the present invention solves the problems of the prior art as described above, that is, the object of the present invention is to provide an advance / retreat guide mechanism that stably guides the meshing portion of the meshing chain and the actuated body. It is an object of the present invention to provide an interlocking chain type advance / retreat operation device having the above.

According to the first aspect of the present invention, a pair of meshing chains that transmit power to the actuated body to advance and retract the actuated body, and extend and retract in the advancing / retreating direction of the actuated body, the advancing / retreating direction of the actuated body with respect to the base In the interlocking chain type advance / retreat operation device provided with an advance / retreat guide mechanism for guiding, the advance / retreat guide mechanism has a plurality of slide portions relatively slidable in the advance / retreat direction, and the plurality of slide portions are arranged in parallel. Direction and the advancing / retreating direction intersect, and the slide portion is provided in a state of being in contact with each other in the juxtaposed direction, and the advancing / retreating direction of the advancing / retreating guide mechanism is extended in a plurality of slide portions. A retracting side end slide part that is a retracting end in the advancing / retreating direction is fixed relative to the base, and an advancing side end sliding part that is an advancing / retreating direction advancing side end among the plurality of slide parts in the extended state It is arranged on the side closer to the meshing chain than the retracting side end slide part in the parallel arrangement direction, and is connected to the advancing / retreating direction advancing side of the meshing part of the actuated body or the meshing chain, and the meshing part advances in the advancing / retreating direction The problem mentioned above is solved by being fixed relatively with respect to the side.
Here, “relatively fixed” may be fixed so that the positional relationship does not change relatively, and may be fixed directly to the object or indirectly fixed. May be.

  The invention according to claim 2 is characterized in that, in addition to the configuration of the meshing chain type advance / retreat operation device described in claim 1, the advance / retreat direction retract side slide part which is the advance / retreat direction retract side of the plurality of slide parts. The cross-sectional area viewed from the advancing / retreating direction is provided larger than the cross-sectional area viewed from the advancing / retreating direction advancing side slide part which is the advancing / retreating direction advancing side of the advancing / retreating direction slide part of the plurality of slide parts. Therefore, the above-described problems are further solved.

  In addition to the configuration of the meshing chain type advance / retreat operation device according to claim 1 or 2, the invention according to claim 3 is an advance / retreat direction retract side which is an advance / retreat direction retract side of the plurality of slide portions. The slide portion is provided with a material that is higher in rigidity than the material of the advancing / retreating direction advancing side sliding portion that is the advancing / retreating direction advancing side than the advancing / retreating direction retreating side slide portion of the plurality of slide portions, and thus the above-described problem. It will solve further.

  The invention according to claim 4 is characterized in that, in addition to the configuration of the interlocking chain type advance / retreat operation device according to any one of claims 1 to 3, the number of the slide portions is three or more. An intermediate slide portion between the retreat side end slide portion and the advance side end slide portion is provided on the arm extending from the advance side of the intermediate slide portion toward the side of the juxtaposed direction meshing chain and on the distal end side of the arm In addition, the above-described problem is further solved by providing an engaging portion that engages with the meshing portion of the meshing chain and is slidable in the advancing and retreating direction with respect to the meshing portion of the meshing chain.

  The meshing chain type advance / retreat operation device of the present invention comprises a pair of meshing chains and an advance / retreat guide mechanism for expanding and contracting in the advance / retreat direction of the actuated body to guide the actuated body in the advance / retreat direction with respect to the base. In addition to transmitting power such as a drive motor to the actuated body, the actuated body can move forward and backward, and the following specific effects can be achieved.

  According to the meshing chain type advance / retreat operation device according to the first aspect of the present invention, the advance / retreat guide mechanism has a plurality of slide portions relatively slidable in the advance / retreat direction, and the juxtaposed direction of the plurality of slide portions is The sliding part is provided in a state where the advancing and retreating directions intersect and the slide parts are in contact with each other in the juxtaposed direction. A retreat side end slide part is fixed relative to the base, and the extended side end slide part, which is the advancing side end of the plurality of slide parts in the extended state, is the retraction side end in the juxtaposed direction. It is arranged on the side closer to the meshing chain than the slide part, and is connected to the advancing / retreating direction advancing side of the meshed part of the actuated body or the meshing chain and relative to the advancing / retreating direction advancing side of the meshing part By being fixed, the meshing part of the meshing chain is always the same distance between the sliding part on the advancing side and the advancing side of the meshing part of the meshing chain over the entire range of the stroke in which the actuated body advances and retracts in the advancing and retreating direction. Since the load resistance with respect to the load received at the advancing side end of the carriage is always constant over the entire stroke range, the advance / retreat guide mechanism can stably guide the meshing portion of the meshing chain and the actuated body.

  According to the interlocking chain type advance / retreat operation device of the invention according to claim 2, in addition to the effect produced by the invention according to claim 1, the advance / retreat direction retract side slide portion which is the advance / retreat direction retract side of the plurality of slide portions. The cross-sectional area viewed from the advancing / retreating direction of the plurality of slide portions is larger than the cross-sectional area viewed from the advancing / retreating direction advancing side slide portion that is the advancing / retreating direction advancing side of the advancing / retreating direction slide portion of the plurality of slide portions As a result, the load resistance increases on the retract side where the load acts more than the advance side when the meshing portion of the mesh chain is advanced, so the cross-sectional area of the plurality of slide parts is larger than that of the same configuration. Reduction in rigidity can be suppressed.

  According to the meshing chain type advance / retreat operation device of the invention according to claim 3, in addition to the effect produced by the invention according to claim 1 or claim 2, the advance / retreat direction which is the retreat direction retracting side of the plurality of slide portions. The retraction side slide part is provided with a material that is higher in rigidity than the material of the advancing / retreating direction advancing side sliding part that is the advancing / retreating direction advancing side of the advancing / retreating direction retreating side slide part among the plurality of slide parts, thereby Since the load resistance is increased on the retreat side where the load acts more than the advance side in the state where the meshing portion has advanced, it is possible to suppress a decrease in the rigidity of the advance / retreat guide mechanism as compared with the same configuration of the material of the plurality of slide portions.

According to the meshing chain type advance / retreat operation device of the invention according to claim 4, in addition to the effect of the invention according to any one of claims 1 to 3, the number of slide portions is three or more. The intermediate slide portion between the retracting side end slide portion and the advance side end slide portion is provided on the arm extending from the advance side of the intermediate slide portion toward the juxtaposed direction meshing chain side, and on the distal end side of the arm. And an engagement portion that engages with the meshing portion of the meshing chain and is slidable in the advancing and retreating direction with respect to the meshing portion of the meshing chain. Since the coupling portion engages with the middle portion of the meshing portion of the meshing chain, the meshing portion of the meshing chain and the actuated body can be guided more stably.
Further, when the meshing part of the meshing chain is retracted, the arm of the intermediate slide part is rearward in the traveling direction and reaches the vicinity of the base, so that the arm advances and retreats without interfering with the retracting movement of the meshing part of the meshing chain. The guide mechanism can be shrunk smoothly.

The perspective view which shows the meshing chain type | formula advance / retreat operation apparatus at the time of advance of 1st Example of this invention. The disassembled perspective view and perspective view of a pair of meshing chain used for a meshing chain type advance / retreat operation device. The front view and side view of a meshing chain type advance / retreat operation device at the time of retraction according to the first embodiment of the present invention. The side view which shows the meshing chain type | formula advance / retreat operation apparatus at the time of advance of 1st Example of this invention. The front view which shows the meshing chain type | formula advance / retreat operation apparatus of 2nd Example of this invention. The front view which shows the meshing chain type | formula advance / retreat operation apparatus of 3rd Example of this invention. The front view and side view of a meshing chain type advance / retreat operation device during retraction according to a fourth embodiment of the present invention. The side view which shows the meshing chain type advance / retreat operation apparatus at the time of advance of 4th Example of this invention. The side view which shows the time at the time of retraction | saving of the meshing chain type | formula advance / retreat operation apparatus which is a problem in this application, and advancing.

  The present invention includes a pair of meshing chains that transmit power to an actuated body to advance and retract the actuated body, and an advance / retreat guide that expands and contracts in the advance / retreat direction of the actuated body to guide the actuated body in the advance / retreat direction. In a meshing chain type advance / retreat operation device having a mechanism, the advance / retreat guide mechanism has a plurality of slide portions that are relatively slidable in the advance / retreat direction, and the juxtaposed direction of the plurality of slide portions intersects the advance / retreat direction. The slide portion is provided in a state where the slide portions are adjacent to each other in the juxtaposed direction, and the retract side end slide that is the retract side end of the plurality of slide portions in a state where the advance / retreat guide mechanism extends in the advance / retreat direction. The advancing side end sliding part which is the advancing / retreating direction advancing side end of the plurality of slide parts is engaged with the retracting side end sliding part in the juxtaposed direction with the portion fixed relative to the base and extended. Choi Is connected to the advancing / retreating direction advancing side of the meshed portion of the actuated body or the meshing chain and is fixed relative to the advancing / retreating direction advancing side of the meshing portion, As long as the meshing portion of the meshing chain and the actuated body are stably guided, any specific embodiment may be used.

For example, the power of the interlocking chain type advance / retreat operation device may be based on the power of the drive motor, or may be based on the force by which a person rotates a lever or a handle.
Furthermore, the drive sprocket which transmits motive power, such as a drive motor, to a meshing chain may be arrange | positioned 1 each on both sides of a pair of meshing chain, and may be arrange | positioned one side.
Further, the meshing chain may have a multi-row structure in which inner link units composed of inner tooth plates arranged in a pair on the left and right in the chain width direction are connected in a plurality of rows in the chain width direction, or have a single row structure. It may be.
Further, the meshing chain may be a meshing chain configured by connecting a large number of internal and external tooth plates with only connecting pins without arranging the bushing, and the drive sprocket is engaged with the bush or the roller loosely fitted to the bushing. It may be driven together.

  The specific shape of the internal chain plate and external plate of the meshing chain used in the meshing chain type advance / retreat operation device of the present invention is such that the same type of plates facing each other are meshed together to be integrated. Any shape may be used as long as each of them is branched off.

Hereinafter, a meshing chain type advance / retreat operation device 100 according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 4.
Here, FIG. 1 is a perspective view showing the meshing chain type advance / retreat operation device 100 at the time of advancement of the first embodiment of the present invention, and FIG. 2A is a meshing chain according to the first embodiment of the present invention. FIG. 2B is an exploded perspective view of a part of the pair of meshing chains 140 of the type advance / retreat operation device 100, and FIG. 2B is a pair of meshing chains 140 of the meshing chain type advance / retreat operation device 100 according to the first embodiment of the present invention. FIG. 3 (A) is a front view of the meshing chain type advance / retreat operation device 100 during retraction according to the first embodiment of the present invention, and FIG. 3 (B) is a view in FIG. 3 (A). FIG. 4 is a side view seen from the reference numeral 3B shown, and FIG. 4 is a side view seen from the reference numeral 4 shown in FIG.

  The meshing chain type advance / retreat operation device 100 according to the first embodiment of the present invention transmits the power of a drive motor (not shown) to the actuated body 110 as shown in FIGS. And a forward / backward guide mechanism 130 that extends and retracts in the forward / backward direction S of the operated body 110 and guides the operated body 110 in the forward / backward direction S with respect to the base 120.

Then, the power of the drive motor is transmitted to the pair of meshing chains 140 via the drive sprocket (not shown) in the base 120, and the pair of meshing chains 140 is taken in and out of the chain storage part 121 of the base 120, The actuated body 110 is configured to advance and retract in the advance / retreat direction S with respect to the base 120.
Thereby, for example, when the advancing / retreating direction S is a vertical direction, a conveyed product (not shown) placed on the operated part 110 can be moved in the advancing / retreating direction S, and the advancing / retreating direction S is a horizontal direction. In this case, the conveyed product that comes into contact with the actuated body 110 can be moved in the forward / backward direction S.

Here, the pair of meshing chains 140 used in the meshing chain type advance / retreat operating device 100 will be described.
As shown in FIGS. 2 (A) and 2 (B), the pair of meshing chains 140 includes one meshing chain 140A and the other meshing chain 140B.
One (one) meshing chain 140 </ b> A of the pair includes, for example, an internal tooth plate 141, an external tooth plate 142, a bush 143, a connecting pin 144, and a roller 145.

Among these, the internal tooth plate 141 has a pair of bush holes arranged in the chain width direction U, and spaced apart in the longitudinal direction of the chain.
In addition, a pair of external tooth plates 142 are disposed outside the pair of internal tooth plates 141, and have pin holes arranged in the longitudinal direction of the chain.

Then, both ends of the bush 143 that is rotatably inserted into the roller 145 are press-fitted into the bush holes of the pair of internal tooth plates 141, and the connecting pin 144 is rotatably inserted into the bush 143. Is press-fitted into the pin holes of the pair of external tooth plates 142, whereby the internal tooth plate 141 and the external tooth plate 142 are coupled in the longitudinal direction of the chain.
In the present embodiment, the unit composed of the pair of internal tooth plates 141 and the pair of external tooth plates 142 is configured in one row in the chain width direction U, but it goes without saying that it may be in two or more rows. .

  For example, when a drive motor (not shown) is driven to rotate forward, the power of the drive motor is disengaged between the pair of mesh chains 140 stored in the two chain storage portions 121 via a drive sprocket (not shown). Each disengagement portion 140H is pulled out and moved to one end side in the chain longitudinal direction (advancing and retreating direction advance side) which is the meshing portion 140G side of the pair of meshing chains 140.

Then, while the disengagement part 140H is moved by receiving power, it is meshed and integrated sequentially by the merge of two guide grooves (not shown), and the integral engagement part 140G moves to the advance side in the forward / backward direction.
On the other hand, when the drive motor is driven in the reverse direction, the meshing portion 140G of the pair of meshing chains 140 receives power and moves toward the retracting side in the forward / backward direction to disengage from each other by the branching of one guide groove (not shown) and disengaged. The portion 140H is configured to move to the other end side in the chain longitudinal direction (retreat side in the advancing / retreating direction) and be stored in the two chain storage portions 121, respectively.

Next, the advance / retreat guide mechanism 130 of the meshing chain type advance / retreat operation device 100 of the present invention will be described.
The advance / retreat guide mechanism 130 has a retracting side end slide portion 131, an intermediate slide portion 133, and an advancing side end slide portion 132 as a plurality of slide portions that are relatively slidable in the advance / retreat direction S.

Then, the side-by-side direction T and the advancing / retracting direction S of the retracting side end slide part 131, the intermediate slide part 133, and the advance side end slide part 132 intersect, and the retract side end slide part 131, the intermediate slide part 133, and the advance side The end slide part 132 is provided in a state of being in contact with each other in the juxtaposition direction T.
In addition, the retracting side end slide portion 131 that is the retracting end in the advancing / retreating direction among the plurality of slide portions in a state where the advancing / retreating guide mechanism 130 is extended in the advancing / retreating direction S is fixed relatively to the base 120.
That is, the retracting side end slide portion 131 is fixed directly or indirectly to the base 120.

Further, the advancing side end slide portion 132 that is the advancing / retreating direction advancing side end of the plurality of slide portions in a state where the advancing / retreating guide mechanism 130 is extended in the advancing / retreating direction S is more than the retracting side end slide portion 131 in the juxtaposed direction T. It is arranged on the side approaching the pair of meshing chains 140.
Further, the advancing side end slide portion 132 is connected to the advancing / retreating direction advancing side of the meshed portion 140G of the actuated body 110 or the pair of meshing chains 140 and is relatively fixed to the advancing / retreating direction advancing side of the meshing portion 140G. .

  Accordingly, the distance L between the advance side end slide part 132 and the advance side of the meshing part 140G of the pair of meshing chains 140 is always the same distance L in the entire range of the stroke in which the actuated body 110 advances and retracts in the advance and retreat direction S. The load resistance against the load that the advancing side end portion of the meshing portion 140G of the pair of meshing chains 140 receives from the conveyed product or the like is always constant over the entire stroke range.

Specifically, as shown in FIGS. 1, 3A, 3B, and 4, the retracting side end slide portion 131, the intermediate slide portion 133, and the advancing side end slide portion 132 are arranged side by side. Arranged in order toward the meshing chain side.
Here, the advancing / retreating direction S may be the horizontal direction, the juxtaposed direction T may be the vertical direction, the advancing / retreating direction S may be the vertical direction, and the juxtaposed direction T may be the horizontal direction.
When the juxtaposed direction T is a vertical direction, the advance / retreat guide mechanism 130 is positioned below the meshing portion 140G of the pair of meshing chains 140, and the advance / retreat guide mechanism 130 receives oil from the meshing portions 140G of the pair of meshing chains 140. It becomes.

Among them, the retracting side end slide part 131 includes a protruding rail part 131a extending in the advancing / retreating direction S, an advancing side regulating part 131d provided on the advancing / retreating direction advancing side, and a retreating provided on the advancing / retreating direction retreating side. Side regulating portion 131e.
Further, the intermediate slide portion 133 includes a ridge rail portion 133a extending in the forward / backward direction S, a concave groove portion 133b slidably engaged with the ridge rail portion 131a of the retraction side end slide portion 131, and a retraction side The protrusion 133c that can come into contact with the advancing side restricting portion 131d and the retreating side restricting portion 131e of the end slide portion 131, the advancing side restricting portion 133d provided on the advancing / retreating direction advancing side, and a retreat provided on the advancing / retreating direction retreating side And a side regulating portion 133e.
Furthermore, the advancing side end slide part 132 includes a concave groove 132b slidably engaged with the protruding rail part 133a of the intermediate slide part 133, an advancing side restricting part 133d and a retracting side restricting part 133e of the intermediate slide part 133, And a projecting portion 132c capable of abutting.

For example, the cross-sectional shape of the protrusion rail portion 131a of the retracting side end slide portion 131 viewed from the advancing / retreating direction S is formed into a T shape or the like, and the cross-sectional shape of the concave groove portion 133b of the intermediate slide portion 133 viewed from the advancing / retreating direction S is used. It may be formed in a shape that wraps around the T-shaped section of the rail, etc., and the concave groove portion 133 b of the intermediate slide portion 133 may be configured to engage with the protruding rail portion 131 a of the retracting side end slide portion 131.
As a result, the intermediate slide portion 133 and the retracting side end slide portion 131 are slidable in the forward / backward direction S while restricting movement in the direction (T) away from each other.

Similarly, the cross-sectional shape of the protruding rail portion 133a of the intermediate slide portion 133 viewed from the advancing / retreating direction S is formed into a T-shape or the like, and the cross-sectional shape of the concave groove 132b of the advancing side end slide portion 132 viewed from the advancing / retreating direction S May be formed in a shape that wraps around the T-shaped section of the rail, and the like so that the recessed groove 132b of the advancing side end slide portion 132 engages with the protruding rail portion 133a of the intermediate slide portion 133. .
As a result, the intermediate slide portion 133 and the advance side end slide portion 132 are slidable in the forward / backward direction S while restricting movement in the direction (T) away from each other.

In a state where the meshing portions 140G of the pair of meshing chains 140 are retracted and the advance / retreat guide mechanism 130 is contracted in the advance / retreat direction S, as shown in FIG. The portion 131e and the protrusion 133c of the intermediate slide portion 133 are in contact with each other.
Similarly, the retracting side restricting portion 133e of the intermediate slide portion 133 and the protruding portion 132c of the advancing side end slide portion 132 are in contact with each other.

Here, when the meshing portions 140G of the pair of meshing chains 140 advance and move, and the advance / retreat guide mechanism 130 extends in the advance / retreat direction S, first, the advance side end slide portion 132 moves toward the advance / retreat direction with respect to the intermediate slide portion 133. Slide relative to
At this time, the protrusion 132c of the advance side end slide part 132 is separated from the retracting side restricting part 133e of the intermediate slide part 133 and approaches the advance side restricting part 133d of the intermediate slide part 133.

When the protrusion 132c of the advance side end slide part 132 comes into contact with the advance side restricting part 133d of the intermediate slide part 133, the advance side end slide part 132 and the intermediate slide part 133 are integrated with each other. Slide relative to 131 toward the advancing / retreating direction.
At this time, the protrusion 133c of the intermediate slide part 133 is separated from the retracting side restricting part 131e of the retracting side end slide part 131 and approaches the advancing side restricting part 131d of the retracting side end slide part 131.

Then, as shown in FIG. 4, when the actuated body 110, which is just before the protrusion 133 c of the intermediate slide portion 133 comes into contact with the advance side regulating portion 131 d of the retracting side end slide portion 131, stops when a predetermined stroke is moved. .
Here, as described above, the distance L between the advancing side end slide part 132 and the advancing side of the meshing portion 140G of the pair of meshing chains 140 is always constant while the actuated body 110 moves by a predetermined stroke, The load resistance with respect to the load that the advancing side end of the meshing portion 140G of the pair of meshing chains 140 receives from the conveyed product or the like is always constant over the entire stroke range.

On the other hand, when the engagement portion 140G of the pair of engagement chains 140 retracts from the state shown in FIG. 4 and the advance / retreat guide mechanism 130 contracts in the advance / retreat direction S, the advance side end slide portion 132 is first moved to the intermediate slide portion 133. On the other hand, it slides relatively toward the retracting side in the forward / backward direction.
At this time, the protrusion 132c of the advance side end slide part 132 is separated from the advance side restricting part 133d of the intermediate slide part 133 and approaches the retraction side restricting part 133e of the intermediate slide part 133.

When the protrusion 132c of the advance side end slide part 132 comes into contact with the retracting side restricting part 133e of the intermediate slide part 133, the advance side end slide part 132 and the intermediate slide part 133 are integrated with each other. Slide relative to 131 toward the retracting side in the forward / backward direction.
At this time, the protrusion 133c of the intermediate slide part 133 is further separated from the advance side restricting part 131d of the retracting side end slide part 131 and approaches the retracting side restricting part 131e of the retracting side end slide part 131.
Then, as shown in FIG. 3B, when the actuated body 110 is moved by a predetermined stroke immediately before the protrusion 133c of the intermediate slide portion 133 comes into contact with the retracting side restricting portion 131e of the retracting end slide portion 131. Stop.

  The meshing chain type advance / retreat operation device 100 according to the first embodiment of the present invention thus obtained has a retracting side end slide as a plurality of slide portions in which the advance / retreat guide mechanism 130 is relatively slidable in the advance / retreat direction S. Portion 131, intermediate slide portion 133, and advance side end slide portion 132, and the side-by-side direction T of these retracting side end slide portion 131, intermediate slide portion 133, and advance side end slide portion 132 intersects the advancing / retreating direction S. The retract side end slide portion 131, the intermediate slide portion 133, and the advance side end slide portion 132 are provided in contact with each other in the juxtaposed direction T, and the advance / retreat guide mechanism 130 extends in the advance / retreat direction S. The retraction side end slide portion 131 which is the retreat side end of the plurality of slide portions is fixed relatively to the base 120. Of the plurality of slide portions, the advancing side end slide portion 132 which is the advancing side advancing side end of the plurality of slide portions is arranged closer to the pair of meshing chains 140 than the retracting side end slide portion 131 in the side-by-side direction T. And is connected to the advancing / retreating direction advancing side of the meshing portion 140G of the actuated body 110 or the pair of meshing chains 140 and fixed relative to the advancing / retreating direction advancing side of the meshing portion 140G. The effect of the guide mechanism 130 is enormous, such as being able to stably guide the meshing portions 140G of the pair of meshing chains 140 and the actuated body 110.

Next, a meshing chain type advance / retreat operating device 200 according to a second embodiment of the present invention will be described with reference to FIG.
Here, FIG. 5 is a front view showing a meshing chain type advance / retreat operating device 200 of the second embodiment of the present invention.

  The meshing chain type advance / retreat operation device 200 of the second embodiment increases the number of slide portions of the advance / retreat guide mechanism 130 of the meshing chain type advance / retreat operation device 100 of the first embodiment to four and engages between the slide portions. The protrusion rail portion and the concave groove portion are two sets, and many elements are common to the meshing chain type advance / retreat operation device 100 of the first embodiment. Only the codes in the 200s with the common digits are attached.

As shown in FIG. 5, the advance / retreat guide mechanism 230 of the meshing chain type advance / retreat operation device 200 according to the second embodiment of the present invention includes a retreat side end slide portion 231, a first intermediate slide portion 233, 2 has an intermediate slide portion 234 and an advancing side end slide portion 232.
Among these, the retreat side end slide part 231 has two protrusion rail parts 231a extended in the advance / retreat direction S.
That is, the two protrusion rail parts 231a are formed.

Further, the first intermediate slide portion 233 is slidably engaged with the two ridge rail portions 233a extending in the advancing / retreating direction S and the two ridge rail portions 231a of the retracting side end slide portion 231, respectively. It has two concave grooves 233b.
Further, the second intermediate slide portion 234 is slidably engaged with the two protrusion rail portions 234a extending in the advance / retreat direction S and the two protrusion rail portions 233a of the first intermediate slide portion 233, respectively. And two concave grooves 234b.

The advancing side end slide portion 232 has two concave groove portions 232b that are slidably engaged with the two protruding rail portions 234a of the second intermediate slide portion 234, respectively.
This increases the rigidity of the advance / retreat guide mechanism 230 when the number of engagement portions between the slide portions increases and the slide portion extends in the advance / retreat direction S.

Next, an interlocking chain type advance / retreat operation device 300 according to a third embodiment of the present invention will be described with reference to FIG.
Here, FIG. 6 is a front view showing the meshing chain type advance / retreat operation device 300 of the third embodiment of the present invention.

  The meshing chain type advance / retreat operation device 300 of the third embodiment increases the number of slide portions of the advance / retreat guide mechanism 130 of the meshing chain type advance / retreat operation device 100 of the first embodiment to four and aligns the slide portions with the base 120. Since the installation direction T is changed, and many elements are common to the meshing chain type advance / retreat operation device 100 of the first embodiment, detailed description of common items is omitted, and the 300 series in which the last two digits are common Only the sign of

As shown in FIG. 6, the advance / retreat guide mechanism 330 of the meshing chain type advance / retreat operation device 300 according to the third embodiment of the present invention includes a retract side end slide portion 331, a first intermediate slide portion 333, 2 has an intermediate slide portion 334 and an advancing side end slide portion 332.
Furthermore, the retracting side end slide portion 331, the first intermediate slide portion 333, the second intermediate slide portion 334, and the advance side end slide portion 332 are arranged in contact with each other in the juxtaposition direction T.

Here, the advancing / retreating direction S of the actuated body 310 may be a horizontal direction, and the juxtaposed direction T may be a horizontal direction, the advancing / retreating direction S of the actuated body 310 may be a vertical direction, and the juxtaposed direction T is a horizontal direction. Good.
That is, if the retracting side end slide portion 331, the first intermediate slide portion 333, the second intermediate slide portion 334, and the advance side end slide portion 332 are arranged in contact with each other in the juxtaposed direction T, the above-described case is possible. The same operational effects as those of the first embodiment can be obtained.

Next, an interlocking chain type advance / retreat operation device 400 according to a fourth embodiment of the present invention will be described with reference to FIGS.
Here, FIG. 7 (A) is a front view of the meshing chain type advance / retreat operation device 400 during retraction according to the fourth embodiment of the present invention, and FIG. 7 (B) is a reference numeral 7B shown in FIG. 7 (A). FIG. 8 is a side view showing the meshing chain type advance / retreat operation device 400 at the time of advancement according to the fourth embodiment of the present invention.

  In the meshing chain type advance / retreat operation device 400 of the fourth embodiment, the number of slide portions of the advance / retreat guide mechanism 130 of the meshing chain type advance / retreat operation device 100 of the first embodiment is increased to four and each slide portion is moved from the advance / retreat direction S. The cross-sectional area is changed, and arms (433f, 434f) that engage with the meshing portions 140G of the pair of meshing chains 140 are formed in the middle slide part. Since it is common with the operating device 100, detailed description of common items will be omitted, and only the reference numbers in the 400 series having the same lower two digits will be attached.

  As shown in FIGS. 7 and 8, the advance / retreat guide mechanism 430 of the meshing chain type advance / retreat operation device 400 according to the fourth embodiment of the present invention includes a retraction side end slide portion 431 and a first intermediate slide portion as a plurality of slide portions. 433, a second intermediate slide portion 434, and an advancing side end slide portion 432.

Furthermore, the cross-sectional area seen from the advancing / retreating direction S of the first intermediate slide portion 433 as the advancing / retreating direction retracting side slide portion which is the advancing / retreating direction retracting side of the plurality of slide portions is the first intermediate of the plurality of slide portions. It is larger than the cross-sectional area seen from the advancing / retreating direction S of the second intermediate slide part 434 as the advancing / retreating direction advancing side slide part which is the advancing / retreating direction advancing side from the slide part 433.
As a result, the load resistance increases on the retreat side where the load acts more than the advance side in a state where the meshing portion 440G of the pair of mesh chains 440 has advanced.
In the present embodiment, as an example, the thickness TH2 in the juxtaposition direction T at the base of the first intermediate slide part 433 is thicker than the thickness TH1 in the juxtaposition direction T at the base of the second intermediate slide part 434. The sectional area of the first intermediate slide portion 433 viewed from the advancing / retreating direction S is larger than the sectional area of the second intermediate slide portion 434 viewed from the advancing / retreating direction S.
Of course, not only the thickness but also the width may be changed to increase the cross-sectional area.

In addition, the first intermediate slide portion 433 serving as the advancing / retreating direction retracting side slide portion which is the advancing / retreating direction retracting side of the plurality of slide portions is closer to the advancing / retreating direction advancement side than the first intermediate slide portion 433 among the plurality of slide portions. It is made of a material having higher rigidity than that of the second intermediate slide portion 434 as a certain advance / retreat direction advance side slide portion.
As a result, the load resistance increases on the retreat side where the load acts more than the advance side in a state where the meshing portion 440G of the pair of mesh chains 440 has advanced.
In the present embodiment, as an example, the material of the first intermediate slide part 433 is steel, and the material of the other second intermediate slide part 434 is aluminum.

The number of slide portions is three or more, and the first intermediate slide portion 433 (second intermediate slide portion 434) between the retracting side end slide portion 431 and the advance side end slide portion 432 is the first intermediate slide. Arm 433f (434f) extending from the advancing / retreating direction advancing side to the side-by-side meshing chain side in the portion 433 (second intermediate slide part 434), and a pair of meshing chains 440 provided on the tip side of this arm 433f (434f) And an engaging portion 433g (434g) that is slidable in the forward / backward direction S with respect to the meshing portion 440G of the pair of meshing chains 440.
As a result, the engagement portion 433g (434g) of the arm 433f (434f) engages with the intermediate portion of the engagement portion 440G of the pair of engagement chains 440 with the engagement portion 440G of the pair of engagement chains 440 advanced.
Further, when the meshing portion 440G of the pair of meshing chains 440 is retracted, the arm 433f of the first intermediate slide portion 433 and the arm 434f of the second intermediate slide portion 434 reach the vicinity of the base 420 in the advancing direction. The advance / retreat guide mechanism 130 smoothly contracts without the arms 433f, 434f interfering with each other.

Specifically, the first intermediate slide portion 433 includes an arm 433f that extends from the first intermediate slide portion 433 to the side-to-side meshing chain side on the advancing and retreating direction advance side of the first intermediate slide portion 433, and a distal end side of the arm 433f. And an engagement portion 433g that engages with a meshing portion 440G of the pair of meshing chains 440 and is slidable in the forward / backward direction S.
The engaging portion 433g of the first intermediate slide portion 433 engages with the meshing portion 440G of the pair of meshing chains 440 and moves relative to the meshing portion 440G of the pair of meshing chains 440 in the juxtaposed direction T. It is formed to regulate.
The engaging portion 433g of the first intermediate slide portion 433 has a concave portion that is slidably engaged with the end portion of the connecting pin 144 protruding outward from the outer surface of the external tooth plate 141 in the forward / backward direction S. The relative movement in the direction orthogonal to the advancing / retreating direction S and the juxtaposed direction T can be restricted.

  Similarly, the second intermediate slide portion 434 is arranged in parallel with the second intermediate slide portion 434 on the advancing / retreating direction advance side in the second intermediate slide portion 434 and on the advancing / retreating direction advance side from the arm 433f of the first intermediate slide portion 433. An arm 434f extending toward the installation direction meshing chain, and an engagement portion 434g formed on the tip side of the arm 434f and engaged with the meshing portion 440G of the pair of meshing chains 440 and slidable in the advancing and retreating direction S are provided. Yes.

  Then, the engaging portion 434g of the second intermediate slide portion 434 engages with the meshing portion 440G of the pair of meshing chains 440 on the advancing and retreating direction advance side from the engaging portion 433g of the arm 433f of the first intermediate slide portion 433. It is formed so as to restrict relative movement in the juxtaposed direction T with respect to the meshing portion 440G of the meshing chain 440.

As in the first embodiment, the retracting side end slide portion 431 includes an advance side restricting portion 431d and a retracting side restricting portion 431e.
In addition, the first intermediate slide portion 433 includes a protrusion 433c, an advancing side restriction portion 433d, and a retraction side restriction portion 433e.
Similarly, the second intermediate slide portion 434 includes a protrusion 434c, an advance side restricting portion 434d, and a retracting side restricting portion 434e.
Furthermore, the advancing side end slide part 432 has a protrusion part 432c.

Further, for example, a rotatable roller is provided at an engagement portion between the concave groove portion 433b and the ridge rail portion 431a on the retreat side, and the engagement between the concave groove portion 434b and the ridge rail portion 433a on the other advance side is provided. It is desirable to provide a rotatable ball at the location.
Thereby, since the roller has a larger load resistance than the ball, the load resistance on the retracting side in the advance / retreat direction can be made larger than that on the advance side.

  The meshing chain type advance / retreat operation device 400 according to the fourth embodiment of the present invention thus obtained is a first intermediate slide serving as an advancing / retreating direction retracting side sliding portion which is an advancing / retreating direction retracting side among a plurality of slide portions. The cross-sectional area seen from the advancing / retreating direction S of the part 433 is the advancing / retreating direction of the second intermediate slide part 434 as the advancing / retreating advancing side slide part which is the advancing / retreating direction advancing side of the first intermediate slide part 433 among the plurality of slide parts. By providing a larger cross-sectional area as viewed from S, it is possible to suppress a decrease in the rigidity of the advance / retreat guide mechanism 430 as compared to the configuration in which the thicknesses of the plurality of slide portions are the same.

  Further, the number of slide portions is three or more, and the first intermediate slide portion 433 (second intermediate slide portion 434) between the retreat side end slide portion 431 and the advance side end slide portion 432 is the first intermediate slide. Arm 433f (434f) extending from the advancing / retreating direction advancing side of the portion 433 (second intermediate slide portion 434) to the side-by-side meshing chain side, and a pair of meshing chains 440 provided on the tip side of the arm 433f (434f) And the engagement portion 433g (434g) that is slidable in the advancing and retreating direction S with respect to the engagement portion 440G of the pair of engagement chains 440, thereby providing a more stable pair of engagement. The meshing portion 440G of the chain 440 and the actuated body 410 can be guided, and the pair of meshing chains 44 Without reciprocating guide mechanism of the arm 433f (434f) to interfere with the retraction movement of the engagement portion 440G of 430, or the like can be contracted smoothly, the effect is significant.

100, 200, 300, 400 ... meshing chain type advance / retreat operation device 110, 210, 310, 410 ... actuated body 120, 220, 320, 420 ... base 121, 221, 321, 421 ... Chain housing part 130, 230, 330, 430 ... Advance / retreat guide mechanism 131, 231, 331, 431 ... Retraction side end slide part 131a, 231a, 331a, 431a ... Projection rail part 131d, 431d · Advance side restricting portions 131e, 431e ··· Retraction side restricting portions 132, 232, 332, 432 ··· Advance side end slide portions 132b, 232b, 332b, 432b ··· concave grooves 132c, 432c ··· projections 133, 233, 333, 433 (first) intermediate slide part 133 233a, 333a, 433a ... ridge rail part 133b, 233b, 333b, 433b ... concave groove part 133c, 433c ... projection part 133d, 433d ... advance side regulating part 133e, 433e ... retraction Side regulation
433f ... Arm
433g ... engaging portion
234, 334, 434 ... 2nd intermediate slide part
234a, 334a, 434a ... ridge rail part
234b, 334b, 434b ... concave groove
434c ... Projection
434d ... Advance side regulation section
434e ・ ・ ・ Retraction side regulating portion
434f ... Arm
434g ... engaging portion 140, 440 ... a pair of meshing chains 140A ... one meshing chain 140B ... the other meshing chain 140G, 440G ... meshing part 140H ... meshing off part 141 .... Internal tooth plate 142 ... External tooth plate 143 ... Bush 144 ... Connection pin 145 ... Roller 700 ... Engagement chain type advance / retreat operation device 710 ... Operated body 720 ... Base 721 ... Chain storage part 730 ... Advance / Retreat guide mechanism 731 ... First cylinder part 732 ... Second cylinder part 733 ... Third cylinder part 734 ... Fourth cylinder part 740G ... The meshing portion L of the pair of meshing chains: the distance L1 between the advancing side end slide portion ... the spacing L2 between the first tube portion and the meshing portion: the fourth tube Spacing S · · · moving direction T · · · arrangement direction TH1 · · · (the advancing side slide portion) Thickness TH2 · · · (the retracting side slide portion) Thickness U · · · chain width direction and the meshing portion

Claims (4)

A pair of meshing chains that transmit power to the actuated body to move the actuated body forward and backward, and an advance / retreat guide mechanism that expands and contracts in the advancing / retreating direction of the actuated body and guides the actuated body in the advancing / retreating direction with respect to the base In the meshing chain type advance / retreat operation device,
The advance / retreat guide mechanism has a plurality of slide portions that are relatively slidable in the advance / retreat direction, the juxtaposed direction of the plurality of slide portions intersects the advance / retreat direction, and the slide portions are arranged side by side. Provided in contact with each other in the direction,
A retracting side end slide part which is an advancing / retracting direction retracting side end among a plurality of slide parts in a state where the advancing / retreating guide mechanism extends in the advancing / retreating direction is fixed relative to the base,
The advancing side end slide part which is the advancing / retreating direction advancing side end among the plurality of slide parts in the extended state is disposed closer to the meshing chain than the retracting side end slide part in the juxtaposed direction. A meshing chain type advance / retreat operation device connected to the advancing / retreating direction advancing side of the meshed portion of the actuated body or the meshing chain and fixed relative to the advancing / retreating direction advancing side of the meshing portion.   The cross-sectional area of the slide part of the advance / retreat direction, which is the retract side of the advance / retreat direction of the plurality of slide parts, as viewed from the advance / retreat direction, is the advance side of the advance / retreat direction of the slide part. The meshing chain type advance / retreat operation device according to claim 1, wherein the advance / retreat direction advancing side slide portion is larger than a cross-sectional area viewed from the advance / retreat direction.   The advancing / retreating direction retracting side slide part which is the advancing / retreating direction retracting side of the plurality of slide parts is an advancing / retreating direction advancing side slide part which is advancing / retreating direction advancing side than the advancing / retreating direction retracting side slide part of the plurality of slide parts. The interlocking chain type advance / retreat operation device according to claim 1 or 2, wherein the interlocking chain type advance / retreat operation device is provided with a material having rigidity higher than that of the material.   The number of the slide portions is three or more, and the intermediate slide portion between the retreat side end slide portion and the advance side end slide portion is arranged on the side of the juxtaposed direction engagement chain side from the advance side of the intermediate slide portion. And an engaging portion that is provided on the tip end side of the arm and engages with a meshing portion of the meshing chain and is slidable in a forward and backward direction with respect to the meshing portion of the meshing chain. The meshing chain type advance / retreat operation device according to any one of claims 1 to 3.

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