JP3749149B2 - Electronic opening device with selective engagement mechanism and piezoelectric element support - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention comprises a selector head that receives pattern data electronic information and takes a selected posture by bending of a piezoelectric element;
The posture is changed between an engaging posture that engages with the hook and suppresses the lowering and a non-engaging posture that allows the lowering without engaging with the hook with respect to the hook that descends from the top dead center. And a lever that can be freely held in a posture,
In accordance with the selection posture of the selector head, the lever is changed in posture between the engagement posture and the non-engagement posture, and the hook is selectively engaged and held by the lever. The present invention relates to an electronic opening device assisted by a piezoelectric element having such a selective engagement mechanism.
[0002]
[Prior art]
As a prior art of the selective engagement mechanism provided in such an electronic opening device, for example, one disclosed in Japanese Patent Laid-Open No. 2000-239939 can be cited.
This prior art relates to a needle selecting device for a jacquard machine. As shown in FIGS. 10 to 13 of the specification, the piezoelectric actuator 8 (corresponding to the piezoelectric element of the present application) receives pattern data electronic information and curves. In this state, the vertical needle selector 2 (corresponding to the lever of the present application) is selectively swung via the operation element 6 (corresponding to the selector head of the present application), and the vertical needle 20 of the vertical needle selector 2 (applicable to the present application). The state of engagement with the hook) is determined.
[0003]
On the other hand, there is a lever that changes the posture of the lever by the cooperation of an electromagnet and a spring provided in the selector head. Such an example can be found in JP-A-10-96134.
[0004]
[Problems to be solved by the invention]
The former prior art employs a structure in which the bending state of the piezoelectric actuator 8 is directly transmitted to the vertical needle selector 2 via the operator 6 to change the posture of the vertical needle selector 2. Therefore, there is a problem that it is difficult to obtain a large swing torque and it is difficult to ensure a stable operation for a long time.
[0005]
Further, in this configuration, the bending timing of the piezoelectric actuator 8 becomes the posture change timing of the vertical needle selector 2, and the posture change timing of the vertical needle selector 2 is related to the vertical needle selector 2. It is necessary to substantially coincide with the timing at which the vertical needle 20 on the mating side comes to top dead center. However, such timing adjustment must be precise, requires severe adjustment, and tends to cause a malfunction.
[0006]
On the other hand, in the latter prior art, since an electromagnet and a spring are used to change the posture of the lever, it is easy to secure torque for swinging, but heat is likely to be generated by many operations.
In the example shown in Japanese Patent Laid-Open No. 10-96134, the lever tip and the hook tip are always kept in contact with each other as shown in FIGS. During continuous use of the period, wear at the contact portion tends to occur.
[0007]
The purpose of the present application is to adopt a structure having a selector head that utilizes the bending of the piezoelectric element, but it is possible to reliably change the attitude of the lever and to have a margin in the timing of changing the attitude of the selector head. It is to obtain a selective engagement mechanism.
[0008]
[Means for Solving the Problems]
To achieve this object, the selective engagement mechanism according to the first aspect of the present invention is characterized in that:
A select pin that is movable between a lowered position and a raised position, and is connected to the lower side of the select pin elastically close to and away from the lower position, and is raised by raising the hook. A drive pin,
An operation mechanism is provided between the select pin and the lever to select and operate the lever between the non-engagement posture and the engagement posture by the movement of the select pin.
The movement of the select pin in accordance with the selection posture of the selector head adopts a configuration in which the select pin selectively changes the posture of the lever as the drive pin moves.
[0009]
In this configuration, the drive pin is moved upward as the hook is raised to the top dead center. The select pin is elastically connected to the upper portion of the drive pin via a spring or the like. If there is no restriction on the movement of the select pin, the select pin also moves from its lowered position to its raised position.
[0010]
On the other hand, a selector head having a piezoelectric element is provided for the select pin, and the movement of the select pin is restricted or not restricted according to the selection posture of the selector head.
[0011]
Further, regarding the relationship between the select pin and the lever, when the select pin moves from its lowered position to its raised position, for example, the lever is changed in posture through the operation mechanism.
[0012]
Therefore, according to the selection posture of the selector head, movement / non-movement of the select pin is selectively determined, and at the same time, the posture change of the lever is selectively performed via an operation mechanism provided between the select pin and the lever. To be executed. Here, for example, when the movement of the select pin is restricted by the selector head, the select pin does not move due to the elastic connection structure between the drive pin and the select pin, and the movement of the drive pin is absorbed by the elastic connection structure. .
[0013]
In this structure, according to the selection posture of the selector head, the lifting operation of the hook is used for changing the posture of the lever, and the problem that the large swing torque described above cannot be used can be solved.
Further, the lever posture change timing follows the hook raising timing, but the selector head posture change timing does not need to coincide strictly with these timings, and before the lever posture change timing. There is no problem. Therefore, the above-described strict adjustment is not required.
[0014]
Further, in comparison with the latter prior art, it is not necessary to keep the lever and hook constantly in contact with each other without using an electromagnet or the like, so there is a problem of heat generation and wear of the contact surface with sliding. This problem can be solved easily.
[0015]
Now, in the above configuration, as described in claim 2, the select pin includes a first select pin and a second select pin (a pair of select pins),
To configure the operation mechanism,
A first operating mechanism for operating the lever from the disengaged position to the engaged position by moving the first select pin from the lowered position to the raised position between the first select pin and the lever; ,
A second operation mechanism for operating the lever from the engaged position to the non-engaged position by moving the second select pin from the lowered position to the raised position between the second select pin and the lever; It is preferable to provide.
[0016]
This configuration provides an independent select pin corresponding to the posture change from the engaged posture of the lever to the non-engaged posture and vice versa, and the posture of the lever during the upward movement of both select pins It is a change.
On the other hand, as described above, the rise restriction of the both select pins follows the selection posture of the selector head, so that the posture change of the lever can be appropriately made appropriate.
[0017]
In the configuration described so far, as described in claim 3, a magnetic adsorption holding mechanism is provided between the lever and the mechanism frame, and the posture holding of the lever is performed by the magnetic adsorption holding mechanism. preferable.
By doing in this way, the attitude | position of the lever in a specific attitude | position can be hold | maintained comparatively easily.
[0018]
In this case, as described in claim 4, the attracting force of the magnetic attraction / holding mechanism can maintain the selected posture in the holding state of the lever with respect to vibration transmitted to the mechanism, and the drive pin and the It is assumed that it is weaker than the elastic repulsion force of the spring that holds the select pin apart by elastic repulsion.
[0019]
By selecting in this way, the problem that the holding state is released due to the vibration transmitted to the mechanism is solved, and the current posture holding of the lever can be reliably maintained.
On the other hand, in the case where the selection posture of the lever is caused by the movement of the selection pin, the movement of the selection pin occurs along with the movement of the drive pin, and the posture of the lever is changed (release of the adsorption holding by the magnetic adsorption holding mechanism). However, since the magnetic attraction force is set to be weaker than the elastic repulsion force, this operation can be performed reliably.
[0020]
In the above-described configuration, as described in claim 5, it is preferable that the attitude change timing of the selector head precedes the ascending contact timing of the drive focus of the hook that follows correspondingly.
[0021]
As described above, in the mechanism of the present application, the coincidence is not required between the two timings. Therefore, by setting the former timing ahead of the latter, the selection posture of the selector head can be determined in advance, and the operation status of whether to restrict the movement of the subsequent select pin can be realized, and the operation is ensured. I can do it.
Therefore, the strict adjustment conventionally required is not required in the present application.
[0022]
Preferably, the lower end of the selector head is provided with a recess into which the upper end of the select pin enters.
[0023]
In the case of the present application, the select pin moves upward, for example, toward the selector head. On the other hand, in the predetermined selection posture, it is necessary to regulate the movement of the select pin by the selector head. In the case where such regulation is executed, it is preferable that the tip of the select pin is reliably caught by the selector head when the select pin is in contact with the selector head. In this case, if the lower end of the selector head is provided with a recess into which the upper end of the select pin enters, the contact relationship between the two can be ensured and the regulating operation by the selector head can be ensured.
[0024]
Now, as described in claim 7, the module unit including the selector head, the lever, the select pin, and the drive pin, the hook, and a pulley that is positioned by the engagement position of the hook are incorporated. It is preferable to provide the guide rail portion independently and separably.
By adopting such a structure, when an abnormality or the like occurs in the module part or when an abnormality occurs in the guide rail part, the normal operation state can be easily recovered by replacing only the relevant part. it can.
[0025]
According to the eighth aspect of the present invention, the selective engagement state of the pair of hooks provided corresponding to the pair of left and right knives that alternately rise and fall alternately indicates the state of one piezoelectric element provided in the selector head. It is preferable to adopt a configuration that is determined by bending.
[0026]
By adopting such a configuration, a single piezoelectric element and a selector head are used based on the selection posture of the selector head in conjunction with the operation of a pair of knives that normally operate as a pair and a pair of hooks that follow the pair of knives. The engagement positioning selection of the pair of hooks can be performed satisfactorily.
[0027]
Further, as shown in claim 9, by providing the electronic opening device assisted by the piezoelectric element provided with the selective engagement mechanism described so far, it is difficult to cause abnormal operation even at high speed operation, and for a long period of time. It is possible to obtain an electronic opening device that can perform stable and stable operation.
DETAILED DESCRIPTION OF THE INVENTION
An example in which the present application is applied to a jacquard loom equipped with the electronic opening device 1 of the present application will be described.
In FIG. 10, the loom 2 provided with the electric opening device 1 of the present application is illustrated in a simplified manner.
In the loom 2, the warp yarns 100 are sent out from the warp beam 200, and each warp yarn 100 is passed through the meshes of the reeds 300 to perform the opening operation that allows the introduction of the weft yarns for forming the fabric. The woven fabric 101 formed by inserting and finishing the beating is wound around the woven fabric bobbin 400.
[0028]
In the illustrated embodiment, the case where there are only two ridges 300 or two groups of ridges 300 is illustrated, one of which is located on the upper side and the other 300b is located on the lower side. The lower end of each rod 300 is coupled to the mechanism frame of the loom 2 by a tension spring 500, while the upper end is connected to the guide 600 so that the opening of the rod 300 can be positioned. The guide 600 is moved up and down by the electronic opening device 1 provided in the jacquard machine.
[0029]
The jacquard machine has a knife 3 that is mechanically driven up and down for the purpose of patterning by a known configuration, and a hook 4 that moves up and down in the same manner as the knife 3 moves. Yes.
The selective engagement mechanism 5 provided in the electronic opening device 1 of the present application has a pair of hooks 4 that move up and down in response to the up and down movement of the pair of knives 3 for patterning as shown in FIG. This is for engaging and holding the upper and lower positions and appropriately controlling the opening of the eaves 300.
[0030]
As shown in FIG. 1 ((A) is a side view, (B) is a front view), the selective engagement mechanism 1 is configured by including a module portion 6 and a guide rail portion 7 independently, and is in an assembled state. It is configured to be able to work together as one.
[0031]
As shown in FIG. 1, the module unit 6 receives a controller 61 for transmitting pattern data electronic information to a piezoelectric element as an individual piezoelectric actuator, and receives electrical information from the controller 61, and according to the information. A large number of bending (specifically, 16 units) piezoelectric elements 62, selector heads 63 respectively provided corresponding to these piezoelectric elements 62, and the hooks 4 are selectively selected according to the selection posture of each selector head 63. And a selection operation part 64 for engaging and holding the head from the upper side to the lower side.
[0032]
The guide rail portion 7 includes first and second pulleys 72 and 73 connected by a connecting member 71 in the main body so as to be slidable in a guide groove 74 provided in the vertical direction. A wire 75 provided to connect the lower ends of the pair of hooks 4 is stretched over the first pulley 72 that is positioned, and a pair that is connected to the eaves 300 is connected to the second pulley 73 that is positioned below. A guide wire 77 connected to the upper end of the guide 76 is stretched.
By adopting such a structure, the opening operation can be appropriately performed according to the vertical positional relationship of the hook 4 shown in FIG.
[0033]
Now, in the one shown in FIG. 1, twelve selective engagement mechanisms 5 are set as one set.
As will be described in detail below, the selective engagement mechanism 5 has a single piezoelectric element 62, which corresponds to a pair of knives 3 that alternately rise and fall, as shown in FIG. An alternative selection posture of the selector head 63 is determined, and the vertical positions of the pair of left and right hooks 4 shown in FIG. 7 are selectively determined. FIG. 6 is an exploded view of the selective engagement mechanism 5.
[0034]
The feature of the selective engagement mechanism 5 of the present application lies in the engagement positioning selection structure of the hook 4 by the lever 8 provided in the selection operation unit 64 according to the selection posture of the selector head 63. Hereinafter, description will be made with reference to FIGS.
[0035]
First, the selector head 63 positioned at the upper part of the selective engagement mechanism 5 will be described. The selector head 63 is configured to take two selective postures by the bending of the piezoelectric element 62.
FIG. 1 (a) shows a state in which the selection posture on the left side and the selection posture on the right side are alternately taken in order from the selector head 63 located on the left side in the drawing toward the right. This posture selection is caused by the upper arm 63a of the selector head 63 swinging in the left-right direction in FIG.
This swinging direction is the swinging in the left-right direction in FIGS. 2 to 5 (A) (side view), and swinging in the front and back direction of the paper in (B) (front view).
[0036]
Next, the hook 4 that is located below the selection operation unit 64 and is provided in the guide rail unit 7 will be described. As described above, the hook 4 is configured to be slidable in the vertical direction along the vertical guide groove 80 provided in the guide rail portion 7, and a pair of right and left shown in FIG. The lower end side of the hook 4 is connected by a wire 75, and the first pulley 72 is hung on the intermediate portion of the wire 75.
[0037]
As shown in FIGS. 2 to 5 (b), the hook 4 is a knife guide that abuts the sliding guide portion 4a guided by the guide groove 80 and the knife 3 rising from the lower side from above. A contact portion 4b and a hook engagement portion 4c provided near the upper end of the hook 4 and engaged with a lever engagement portion 8a provided at the lower end portion of the lever 8 of the selection operation portion 64 are provided.
The hook 4 is lifted by, for example, ascending the left knife 3 shown in FIGS. 7C, 7D, and 7E and reaches its top dead center. Thus, the state which reached | attained the top dead center is a state shown by FIG.
On the other hand, the lowering of the hook 4 depends on the engagement / non-engagement state with the lever 8 provided in the selection operation unit 64, but in the non-engagement state, FIGS. As shown in the operation of the left hook 4), it follows the lowering of the knife 3.
[0038]
Hereinafter, the structure of the selection operation unit 64 will be described.
As shown in FIGS. 2-6, this selection operation | movement part 64 is provided with the 2nd select pin 9b, the lever 8, the drive pin 10, and the 1st select pin 9a inside the mechanism frame. Furthermore, as shown in FIGS. 2 to 5, the first spring 11 a is provided between the drive pin 10 and the mechanism frame, and the second spring 11 b is provided between the drive pin 10 and the first select pin 9 a and the second select pin 9 b. It is configured with.
Here, the first and second select pins 9a and 9b are positioned so as to overlap each other in the front and back direction of the paper surface (the left and right direction in FIG. 2A) in FIG.
[0039]
Further, the structure of each member will be described in relation to its function.
As shown in the figure, the lever 8 is configured to be swingable about its swing axis, and is engaged with the hook 4 that descends from the top dead center to suppress the lowering. It is configured such that the posture can be freely changed between the combined posture (the posture shown in FIG. 3) and the non-engaging posture (the posture shown in FIG. 2) that allows the hook 4 to descend without engaging the hook 4. Yes.
[0040]
Further, a magnet 12 is built in the upper end portion of the lever 8, and an iron piece 13 is housed in a pair of mechanism frame portions with which the upper end portion abuts, so that the lever 8 takes a certain posture. In FIG. 3, the current posture is maintained as it is by the magnetic attractive force generated between the magnet 12 and the iron piece 13. A protrusion 8b provided in the middle of the lever 8 toward the outside of the mechanism frame is for allowing the engaged state to be released by an operation by an operator.
[0041]
On the other hand, a pair of driven cam surfaces 14 are provided at an intermediate position between the protrusion 8b and the upper end. These driven cam surfaces 14 are provided to contact the active cam surface 15 provided on the first select pin 9a or the second select pin 9b, respectively, and to receive an attitude change operation.
A lever engaging portion 8 a that engages with the hook engaging portion 4 c is provided at the lower end of the lever 8.
[0042]
The first select pin 9a and the second select pin 9b are configured to be movable between a lowered position (position shown in FIGS. 4 and 5) and an elevated position (position shown in FIGS. 2 and 3), respectively. The drive pin 10 is elastically connected through the second spring 11b.
These select pins 9a and 9b have their lowered positions as standby positions, and the standby positions are secured by the respective spring forces while the drive pin 10 is in the standby position.
As shown in FIGS. 2, 3, 4, and 5 (A), the upper ends of the select pins 9a and 9b are selected so as to be spaced apart from the lower end of the selector head 63 at the lowered position, and at the raised position, When the lower end of the selector head 63 is directly above, the position is selected so as to be in contact with and restrained from rising.
[0043]
The relationship between the select pins 9a and 9b and the lever 8 will be described. The first select pin 9a is provided with an active cam surface 15 (see FIG. 3B), and the first select pin 9a is lowered. By moving from the position to the raised position, the active cam surface 15 contacts the driven cam surface 14 of the lever so that the lever 8 is operated from its non-engaged position to the engaged position. Here, such an operation mechanism is referred to as a first operation mechanism.
[0044]
Similarly, the second select pin 9b is provided with an active cam surface 15 (see FIG. 2B), and the lever 8 is engaged with the second select pin 9b by moving from the lowered position to the raised position. It is configured to operate from the combined posture to the non-engaging posture. Here, such an operation mechanism is referred to as a second operation mechanism.
[0045]
On the other hand, when both the select pins 9a and 9b are moved downward from the raised position to the lowered position, any of the select pins 9a and 9b does not contribute to the posture change of the lever 8. Yes.
[0046]
The contact structure between the selector head 63 and the select pins 9a and 9b will be described. As can be seen from FIG. 2A and the like, the swing shaft of the selector head 63 has first and second select pins. It is selected immediately above the middle position between 9a and 9b. As shown in FIG. 9, a pair of inclined surfaces 63 b that are recessed toward the center side when viewed from the side are provided at the lower end of the selector head 63. On the other hand, the tip of the select pins 9a and 9b is similarly provided with an inclined surface 90 (high on the intermediate position side of the select pin) corresponding to the inclined surface 63b in a side view.
By adopting this structure, when the selector head 63 is in the selected posture, the inclined surface 63b on the recessed side serves as a guide surface at the tip of the select pin, so that the regulation can be reliably performed.
[0047]
The drive pin 10 is also configured to be movable between a lowered position and an elevated position, and the lowered position is set as a standby position. The drive pin 10 is connected to the mechanism frame via the first spring 11a and is configured to be biased to its lowered position.
Further, the lowering position is set in a positional relationship in which the driving pin 10 is lifted by contact with the hook 4 rising from the lowering, and when there is no restriction by the selector head 63, the hook 4 is raised. When at the dead point, the drive pin 10 and the select pins 9a and 9b are also set so as to come to their raised positions.
[0048]
The first select pin 9a, the second select pin 9b, and the drive pin 10 are elastically connected by a second spring 11b.
With respect to the elastic repulsive force of the second spring 11b, the attracting force of the magnetic attracting and holding mechanism composed of the magnet 12 and the iron piece 13 maintains the current selected posture of the lever 8 with respect to vibration transmitted to the mechanism frame. It is possible and is selected to be weaker than the elastic repulsive force of the second spring 11b. By selecting in this way, the posture of the lever 8 can be favorably changed.
[0049]
The above is the configuration of the selective engagement mechanism. The operation will be described with reference to FIGS.
1 State of FIG.
This state shows a state in which the knife 3 is moving up, and the hook 4 is also lifted at the same time. On the other hand, as shown in (a) which is a side view, the selector head 63 is in a selection posture that swings to the right, and is in a state where the rise of the first select pin 9a is restricted.
In this state, when the hook 4 is lifted, the drive pin 10 is lifted by the hook 4, the second select pin 9b is lifted, and the lever 8 is changed from the engaged position to the non-engaged position. .
[0050]
2 State of FIG.
This state also shows a state in which the knife 3 is moving upward, and the hook 4 is also lifted simultaneously. On the other hand, as shown in (a) which is a side view, the selector head 63 is in a selection posture that swings to the left, and is in a state where the ascent of the second select pin 9b is restricted.
In this state, when the hook 4 is lifted, the drive pin 10 is lifted by the hook 4, the first select pin 9a is lifted, and the lever 8 is changed from the non-engaged position to the engaged position. .
[0051]
3 State of FIG.
This state shows a state where the knife 3 is moving downward. On the other hand, as shown in (a) which is a side view, the selector head 63 is in a selection posture that swings to the right, and is in a state in which the ascent of the first select pin 9a is restricted.
In this state, the first and second select pins 9a and 9b are both held in the lowered position, so that the posture of the lever 8 is maintained in the non-engagement posture. When the knife 3 is lowered, the hook 4 is also lowered according to the downward movement.
[0052]
4 State of FIG.
This state also shows a state where the knife 3 is moving downward. On the other hand, as shown in (a) which is a side view, the selector head 63 is in a selection posture that swings to the left, and is in a state where the ascent of the second select pin 9b is restricted.
In this state, the first and second select pins 9a and 9b are both held in the lowered position, so that the posture of the lever 8 is maintained in the engaged posture. Even when the knife 3 is lowered, the hook 4 is kept engaged with the lever 8.
[0053]
The above four operation states are combined and operate as shown in FIGS. (A) and (C) show the engagement state corresponding to the lower mouth position, and (E) shows the engagement state corresponding to the upper mouth position.
[0054]
In the above description, the timing of changing the attitude of the selector head 63 and the corresponding rising contact timing of the hook 4 to the drive pin 10 have not been described. Based on the above, the relationship between these timings will be described.
[0055]
In FIG. 8, the horizontal axis indicates time, and the vertical axis indicates the position of the left and right knives 3. Here, the left and right knives 3 mean, for example, a pair of left and right knives 3 that reciprocate up and down alternately as shown in FIG.
The vertical movement locus of the right knife 3a is indicated by a solid line, and the vertical movement locus of the left knife 3b is indicated by a one-dot chain line. Furthermore, the timing at which the knife 3 abuts against the drive pin 10 is shown by a broken line parallel to the trajectory, intersecting with these trajectories. Accordingly, as indicated by the hatched box in the figure, the hatched portion is the period during which the drive pin 10 pushes the upper and lower select pins 9a, 9b.
Now, the posture change timing T1 of the selector head 63 is indicated by an arrow. As can be seen from this figure, the attitude change timing T1 of the selector head 63 precedes the ascending contact timing (timing in the hatched box) of the hook 4 corresponding to the drive pin 10 correspondingly. It turns out that it is selected. Therefore, in this structure, the timing for bending the piezoelectric element upon receiving the pattern data electronic information can be prepared in advance. As a result, the conventional severe timing adjustment is not necessary, and it is not necessary to bend the piezoelectric element to the original position for the next pattern data electronic information. Is also advantageous.
[Brief description of the drawings]
FIG. 1 is a diagram showing an overall configuration of a selective engagement mechanism
FIG. 2 is a diagram illustrating a state in the module unit when the lever is in the disengaged posture.
FIG. 3 is a diagram showing a state in the module unit during an operation in which the lever is engaged;
FIG. 4 is a diagram showing a state in the module section when the hook is lowered with the lever in the non-engagement posture.
FIG. 5 is a diagram showing a state in the module unit when the lowering of the hook is restricted when the lever is engaged;
FIG. 6 is an exploded view of a selection operation unit.
FIG. 7 is a diagram showing an operation order of the selection operation unit over time;
FIG. 8 is a diagram showing the relationship between the positions of the left and right knives over time, the selector head attitude change timing, and the drive pin and select pin ascending contact timing;
FIG. 9 is a diagram showing a contact state between the upper end of the select pin and the lower end of the selector head;
FIG. 10 is a diagram showing a configuration of a loom including a jacquard
[Explanation of symbols]
1 Electronic opening device
3 Hook
4 Knives
5 Selective engagement mechanism
6 Module part
7 Guide rail
8 Lever
9 Select pin
10 Drive pin
11 Spring
12 Magnet
13 Shingles
14 Driven cam surface
15 Active cam surface
63 Selector head
64 selection operation part
72 First pulley
73 Second pulley
75 wires
77 Guide

Claims (9)

A selector head that receives pattern data electronic information and takes a selection posture by bending of the piezoelectric element;
The posture is changed between an engaging posture that engages with the hook and suppresses the lowering and a non-engaging posture that allows the lowering without engaging with the hook with respect to the hook that descends from the top dead center. And a lever that can be freely held in a posture,
A selection engagement mechanism for selectively engaging and holding the hook by the lever by changing the posture of the lever between the engagement posture and the non-engagement posture according to a selection posture of the selector head; ,
A select pin that is movable between a lowered position and a raised position, and is connected to the lower side of the select pin elastically close to and away from the lower position, and is raised by raising the hook. A drive pin,
An operation mechanism is provided between the select pin and the lever to select and operate the lever between the non-engagement posture and the engagement posture by moving the select pin.
A selection engagement mechanism in which the select pin selectively changes the position of the lever as the drive pin rises due to the movement restriction of the select pin according to the selection attitude of the selector head. As the select pin, a first select pin and a second select pin are provided,
To configure the operation mechanism,
A first operating mechanism that operates the lever from the disengaged position to the engaged position by moving the first select pin from the lowered position to the raised position between the first select pin and the lever. The
A second operating mechanism for operating the lever from the engaged position to the non-engaged position by moving the second select pin from the lowered position to the raised position between the second select pin and the lever. The selective engagement mechanism according to claim 1, further comprising: The selective engagement mechanism according to claim 1, further comprising a magnetic adsorption holding mechanism between the lever and the mechanism frame, wherein the magnetic adsorption holding mechanism holds the lever posture. The attraction force of the magnetic attraction holding mechanism can maintain the selected posture of the lever against vibration transmitted to the mechanism, and is weaker than the elastic repulsion force of the spring that holds the drive pin and the select pin apart by elastic repulsion. The selective engagement mechanism according to claim 3, wherein the selective engagement mechanism is selected. The selective engagement mechanism according to any one of claims 1 to 4, wherein the selector head posture change timing precedes a corresponding rising timing of the hook that follows the drive pin. The selective engagement mechanism according to claim 1, wherein a concave portion into which an upper end of the select pin enters is provided at a lower end of the selector head. A module part comprising the selector head, lever, select pin and drive pin;
The selective engagement mechanism according to any one of claims 1 to 6, further comprising a guide rail portion including the hook and a pulley positioned by an engagement position of the hook so as to be independently separable. The selection engagement state of a pair of said hooks provided corresponding to a pair of knives which alternately raise and lower alternately is determined by the curvature of one piezoelectric element provided for the selector head. The selective engagement mechanism according to claim 7. An electronic opening device assisted by a piezoelectric element, comprising the selective engagement mechanism according to claim 1.

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