JPH0547318Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a moving body driving device for reciprocating a moving body on a support.

(Prior Art) Conventionally, as this type of device, for example, Japanese Patent Application Laid-Open No. 58-120847, filed by the same applicant as the applicant of this application,
There is something described in the No. In the knitting machine described in this publication, a carriage as a movable body is placed on a needle bed as a support so as to be able to reciprocate, and after a feed switching plate on the carriage is switched and moved according to the carriage movement direction, When the feed switching plate is held at a predetermined switching position based on the selective operation of a plurality of solenoids, the arrangement position of the rotating body is switched in conjunction with the feeding switching plate, and the rotating body is engaged with and disengaged from the rotating body. This allows the arrangement positional relationship of the pair of ratchets on the feed plate with respect to the pair of ratchet wheels to be switched, such that one ratchet is engaged with one of the ratchet wheels and the other ratchet is disengaged from the other ratchet wheel. By moving the feed plate toward the ratchet wheel in this state, one of the ratchet wheels is rotated in a predetermined direction, and the carriage is moved in a predetermined direction based on the rotation.

(Problem to be solved by the invention) However, in the above knitting machine, each ratchet wheel and rotating body are arranged in three layers on the same axis within a limited space on the carriage. The thickness of the latches must be set to be small, resulting in a reduction in the area of meshing with each ratchet, which leads to faster wear and reduced durability. In addition, in order to hold each ratchet in the switching position, a feed switching plate, multiple solenoids, rotating bodies, etc. are provided, which increases the number of parts and makes assembly difficult.
As a result, there was a problem in that manufacturing costs rose.

(Purpose of the invention) This invention was made in order to solve the above problems, and the purpose is to transmit the movement of the switching member that switches and sets the arrangement positional relationship of each ratchet to each ratchet. , it is not necessary to provide the transmission member coaxially with each ratchet wheel, and thus the meshing area between the ratchet wheel and the ratchet can be secured, improving durability, and the switching member can be moved within a certain range of movement. An object of the present invention is to provide a movable body drive device that can reliably switch the arrangement position of each ratchet simply by reciprocating the ratchet.

(Means for solving the problem) In order to achieve the above purpose, in this invention,
A movable body mounted on a support so as to be reciprocally movable; and a movable body rotatably supported around one axis on the movable body, and the movable body is moved forward or backward based on rotations in mutually different directions. a pair of ratchet wheels, a driving member disposed on the movable body so as to be able to approach and separate from both the ratchet wheels;
It is disposed on the drive member and is switchable between an active position where it engages one of the ratchet wheels from different directions and an inactive position where it does not engage, and where the drive member faces both of the ratchet wheels. A pair of ratchets, the one on the operating position side engaging the corresponding ratchet wheel to rotate the ratchet wheel when the movable body is moved close to each other; a switching member having a switching cam for switching one of the pair of ratchets to an active position and the other to a non-working position, and switching the pair of ratchets to a position in an inverse relationship to the above at another predetermined position of movement;
A transmission member is provided between the switching member and the pair of ratchets, and moves to follow the switching cam as the switching member moves, thereby switching the arrangement of the ratchets.

(Function) Therefore, according to this invention, when the switching member is reciprocated, the transmission member is moved following the switching cam, and the arrangement position of each ratchet is switched by the transmission member. Then, when the driving member is moved toward the ratchet wheel, the ratchet on the operating position side engages with the corresponding ratchet wheel and rotates the ratchet foil, and the movable body moves forward or backward based on the rotation of the ratchet wheel. be done.

(Example) Hereinafter, an example in which this invention is embodied in a device for driving a carriage of a knitting machine will be described in detail with reference to the drawings. As shown in FIG. 4, a large number of knitting needles 2 are arranged in a row on a needle bed 1 serving as a support body so as to be movable back and forth, and a guide rail 3 extending in the longitudinal direction and a large number of knitting needles 2 at the same pitch as the knitting needle arrangement pitch are arranged on a needle bed 1 serving as a support. Racks 4 with teeth are arranged side by side. A carriage 5 as a moving body is placed on the needle bed 1 so as to be able to reciprocate along the guide rail 3. A rotating body 6 is rotatably supported on the carriage 5 by a support shaft 7, and a pinion 8 that meshes with the rack 4 is integrally formed on the lower outer periphery of the rotating body 6. As the rotating body 6 rotates, the carriage 5 is intermittently reciprocated at each knitting needle row pitch through the engagement between the pinion 8 and the rack 4.

As shown in FIG. 7, a pair of ratchet wheels 9 and 10 having teeth facing in opposite directions are integrally formed on the upper outer periphery of the rotating body 6. As shown in FIGS. 1 to 4, a plate-shaped driving member 11 is mounted on the carriage 5 in front of each of the ratchet wheels 9, 10.
A pair of left and right ratchets 12 and 13 are rotatably mounted on the upper surface of the rear end at the base ends thereof. Engagement portions 14, 1 are provided at intermediate portions of each of the ratchets 12, 13, and are capable of engaging and disengaging from the upright wall portions 9a, 10a of the respective teeth of the respective ratchet wheels 9, 10.
5 is formed, and each ratchet 12, 13 is rotated between an active position where each engaging portion 14, 15 engages with each ratchet foil 9, 10, and an inactive position where each engaging portion 14, 15 is disengaged from each ratchet foil 9, 10. Ru. Spring 16, 1 is attached to the proximal end of each ratchet 12, 13.
7 is wound, and each ratchet 12, 13 is biased to rotate toward the operating position by each spring 16, 17.

As shown in FIG. 4, a pair of upper and lower cam wheels 18 and 19 are integrally supported on the carriage 5 so that they can rotate together, and upper and lower surfaces of both cam wheels 18 and 19 are used to move the knitting needles 2 back and forth during knitting operations. A cam groove (not shown) for moving the drive member 11 and a feeding cam groove 20 for moving the drive member 11 back and forth are formed. The feed cam groove 20 includes an equal radius portion 20a and a convex cam portion 20b continuous thereto, and a follower 21 that engages with the feed cam groove 20 is projected on the upper surface of the front end of the drive member 11. It is set up. Then, as both cam wheels 18 and 19 are rotated by a drive motor (not shown) on the carriage 5, the drive member 11 is rotated through the engagement between the feed cam groove 20 and the follower 21. When the drive member 11 is reciprocated back and forth from a position away from the ratchet wheels 9, 10 as shown in FIG. 2 to a position approaching them as shown in FIG. One of the ratchets 1
The ratchet wheels 9, 10 and pinion 8 corresponding to the ratchets 12, 13 by 2, 13
are integrally rotated counterclockwise in FIG. 1 or clockwise in the same figure by one tooth pitch.

As shown in FIGS. 4 to 6, the rotating body 6
A switching member 23 is disposed on a support bracket 22 located above the rear part of the switch member 23 so as to be able to reciprocate from side to side. A pair of left and right guide grooves 24 are formed in the switching member 23, and the support bracket 2
2 has a pair of guide pins 25 protruding from each guide groove 24 to engage with each guide groove 24, respectively. Further, a rack portion 26 is formed on the left front edge of the switching member 23, and a step motor 28 having a pinion 27 that meshes with the rack portion 26 is disposed on the support bracket 22. As the pinion 27 and the rack 26 rotate,
The switching member 23 is reciprocated along the guide groove 24 through engagement with the guide groove 24.

A pair of groove-shaped switching cams 29 and 30 are formed approximately in the center of the switching member 23 at a predetermined interval from side to side. A first holding portion 29a for holding the right ratchet 12 in the operating position is formed at the right end of the right switching cam 29.
On the left side, in order to hold the ratchet 12 in an inactive position, a switching member 23 is located at a predetermined distance rearward from the first holding part 29a.
A second holding part 29b is formed extending along the moving direction, and both 29a and 29b are connected to the diagonal cam part 29c.
connected by. Also, left side switching cam 3
A first holding portion 30a for holding the left side ratchet 13 in the operative position is formed at the left end portion of 0, and a first holding portion 30a for holding the left side ratchet 13 in the non-operative position is formed on the right side. A second holding part 30 that is located a predetermined distance away from the part 30a and extends along the moving direction of the switching member 23.
b is formed, and both 30a and 30b are connected by a diagonal cam portion 30c.

Each switching cam 29 and each ratchet 1
A pair of transmission members 31 and 32 in the form of two-armed levers are rotatably supported on the lower surface of the support bracket 22 at their intermediate portions so as to be located between the transmission members 2 and 13. Followers 33 and 34 protruding from the opposite side are connected to each switching cam 2.
9 and 30, respectively.

When the switching member 23 is disposed at the left moving end position shown in FIG. The member 31 is switched to the active position, and the left side transmission member 32 is switched to the non-operative position due to the engagement between the right end of the second holding portion 30b of the left side switching cam 30 and the follower 34 of the left side transmission member 32. Further, when the switching member 23 is disposed at the right moving end position shown in FIG. The right side transmission member 31 is switched to the inactive position, and the first holding portion 30a of the left side switching cam 30
The left side transmission member 32 is switched to the operating position by engagement with the follower 34 of the left side transmission member 32.
Furthermore, when the switching member 23 is disposed at the intermediate position shown in FIG. Both transmission members 3
1 and 32 are placed in the inactive position.

Connecting pins 35, 36 projecting downward are provided at the other ends of each transmission member 31, 32, and engaging pieces 37, 38 extending rearward are formed on each ratchet 12, 13. springs 16, 17
Each engaging piece 37, 38 is engaged with each connecting pin 35, 36 from the outside by the urging force. Based on the engagement, each ratchet 12, 13
is switched between an active position and a non-active position depending on the arrangement position of each of the transmission members 31 and 32.

An overrun prevention member 39 shown in FIG. 7 is fixed to the upper surface of the rear end of the drive member 11, and
Below the drive member 11, the carriage 5 is provided with a guide groove 42 that extends along the moving direction of the drive member 11, and a guide pin 43 that is movable along the guide groove 42 is provided on the lower surface of the overrun prevention member 39. is installed protrudingly. On the rear surface of the overrun prevention member 39, each of the ratchet foils 9,
A pair of pointed overrun prevention protrusions 40 and 41 that can be individually engaged with 10 are integrally provided. The tip of each overrun prevention protrusion 40, 41 is connected to a line connecting the center of the ratchet wheels 9, 10 and the center of the cam wheels 18, 19 so as to be slightly inconsistent along the rotational direction of each ratchet wheel 9, 10. They are placed on both sides of L.

When the upper ratchet wheel 9 is rotated by one tooth pitch in the counterclockwise direction in FIGS. The run prevention protrusion 40 penetrates inside the tooth tip of the ratchet wheel 9 and engages with the inclined surface 9b of a predetermined tooth, thereby preventing the ratchet wheel 9 from overrunning and preventing the lower ratchet foil 1 from overrunning.
0 is rotated by one tooth pitch in the clockwise direction in FIGS. 1 and 7, the lower overrun prevention protrusion 41 enters inside the tooth tip of the lower ratchet wheel 10 just before the rotation is completed. By engaging with the inclined surface 10b of a predetermined tooth, overrun of the ratchet wheel 10 is prevented.

Next, the operation of the knitting machine in this embodiment will be explained. In FIG. 1, the switching member 23 is arranged at the left moving end position, and the follower 21 of the driving member 11
This figure shows a state in which the cam groove 20 is engaged with the equal radius portion 20a of the feeding cam groove 20. In order to perform a predetermined knitting operation in this state, both cam wheels on the carriage 5 are
When 8 and 19 are rotated once clockwise in Figure 1,
In the first half of the rotation, based on the engagement between the equal radius portion 20a of the feeding cam groove 20 and the follower 21,
The drive member 11 is held in a position close to the ratchet wheels 9 and 10 as shown in FIG.
0b and the follower 21 causes the drive member 11 to reciprocate between the approach position shown in FIG. 1 and the separation position shown in FIGS. 2 and 3.

That is, when the drive member 11 is moved from the approach position to the separate position with the switching member 23 being located at the position shown in Fig. 1, the right ratchet 12 being located at the operating position and the left ratchet 13 being located at the inoperable position, the ratchet 12, 13 is moved along the link pins 35, 36 while maintaining the engagement of the engagement pieces 37, 38 with the link pins 35, 36 of the transmission members 31, 32. Therefore, the ratchet 12, 13 is held in the switching position.

Thereafter, when the drive member 11 is moved from the separation position to the approach position, the engaging portion 1 of the right ratchet 12
4 is the upright wall portion 9 of the tooth of the upper ratchet foil 9
This engagement causes the upper ratchet wheel 9, together with the pinion 8, to rotate counterclockwise in FIG. 1 by one tooth pitch. Based on this rotation of the pinion 8, the carriage 5 is moved to the left by the knitting needle arrangement pitch. Immediately before the rotation of the upper ratchet wheel 9 is completed by one tooth pitch, the upper overrun prevention protrusion 40 of the overrun prevention member 39 is engaged with the inclined surface 9b of a predetermined tooth, and the upper ratchet wheel 9 is rotated. Overruns and overruns of the carriage 5 are prevented.
Furthermore, by repeating the above operations, the carriage 5 is intermittently moved to the left.

On the other hand, when switching the direction of movement of the carriage 5, the drive member 11
The pinion 2 is moved by the step motor 28 while being moved from a position close to 0 to a position away from the pinion 2.
7 is rotated by a predetermined angle. The pinion 27
As the pinion 27 and rack part 26 rotate,
When the switching member 23 is moved rightward to the intermediate position shown in FIG. 29c, the right side transmission member 31 is engaged with the right end of the second holding portion 29b, and accordingly, the right side transmission member 31 is rotated counterclockwise from the operating position shown in FIG.
It is placed in the inactive position shown in the figure. On the other hand, since the follower 34 of the left side transmission member 32 is only relatively moved from the right end to the left end along the second holding portion 30b of the left side switching cam 30, the left side transmission member 32
2 is never rotated. Therefore, each connecting pin 35, 36 of each transmission member 31, 32 and each engaging piece 3
7, 38, each ratchet 12,1
3 is placed in the inactive position.

Based on the subsequent rotation of both cam wheels 18 and 19,
The driving member 11 is the chevron-shaped cam portion 2 of the feeding cam groove 20.
It is moved to the approach position shown in FIG. 1 by the action of 0b. However, in this case, since both the ratchets 12 and 13 are disposed in the inactive position, they do not engage with the ratchet wheels 9 and 10, and therefore the rotary body 6 is in a stopped state, that is, the movement of the carriage 5. is kept in a stopped state.

On the other hand, while the drive member 11 is moved back from the approach position shown in FIG. 1 to the separation position shown in FIG. 2, the switching member 23 is moved to the intermediate position shown in FIG. 2 by the rotation of the step motor 28. When the follower 34 of the left transmission member 32 is moved from the left side to the right movement end position shown in FIG.
The left transmission member 32 is moved counterclockwise from the non-operating position shown in FIG. rotated to the third
It is placed in the working position shown in the figure. Further, since the follower 33 of the right side transmission member 31 is only relatively moved from the right end to the left end along the second holding portion 29b of the right side switching cam 29, the right side transmission member 31 is not rotated. . Therefore, each transmission member 3
1, 32 each connecting pin 35, 36 and each engaging piece 3
7 and 38, the right side ratchet 12 is placed in the inactive position and the left side ratchet 13 is placed in the active position.

Based on the subsequent rotation of both cam wheels 18 and 19,
The driving member 11 is the chevron-shaped cam portion 2 of the feeding cam groove 20.
It is moved to the approach position by the action of 0b. As the drive member 11 moves, the left ratchet 1
The engaging portion 15 of No. 3 engages with the upright wall portion 10a of a predetermined tooth of the lower ratchet wheel 10, and this engagement causes the lower ratchet wheel 10 to engage with the pinion 8.
It is rotated in the clockwise direction in FIG. 3 by one tooth pitch. This rotation of the pinion 8 moves the carriage 5 to the right by one row of knitting needle pitches.

Further, when the lower ratchet wheel 10 is rotated by one tooth pitch, just before the rotation is completed, the lower overrun prevention protrusion 41 of the overrun prevention member 39 on the drive member 11 is rotated by the inclined surface of the predetermined tooth. 10b to prevent the lower ratchet wheel 10 from overrunning. Therefore, overrun of the carriage 5 is also prevented. By repeating the above operations, the carriage 5 is intermittently moved to the right.

On the other hand, while the drive member 11 is moved from the approach position to the separation position, the switching member 23 moves leftward from the right end of movement shown in FIG. 3 to the left end of movement shown in FIG. 3, the left side transmission member 32 is rotated clockwise in FIG. 3 by the cam portion 30c of the left side switching cam 30, thereby switching the left side ratchet 13 from the operating position to the non-working position. During this switching operation of the left ratchet 13, the follower 3 of the right transmission member 31
3 is only relatively moved along the second holding portion 29b of the right switching cam 29, the right ratchet 12 is held in the inactive position.

As the switching member 23 continues to move leftward, the right transmission member 31 moves to the cam portion 2 of the right switching cam 29.
9c in the clockwise direction in FIG. 3, thereby switching the right ratchet 12 from the inactive position to the active position. Also, left side ratchet 13
is held in the inactive position after switching based on the engagement between the follower 34 of the left side transmission member 32 and the second holding portion 30b of the left side switching cam 30. Thereafter, as described above, as the drive member 11 reciprocates, the upper ratchet wheel 9 is rotated by the right ratchet 12, and the carriage 5 is moved leftward.

As mentioned above, in this embodiment, each ratchet 1
Switching member 2 for setting the arrangement positional relationship of 2 and 13
The switching member 23 and the pair of ratchets 1
2, 13, the ratchet foil 9, 1
Since the transmission members 31 and 32 are arranged on both sides of 0,
The transmission members 31 and 32 are connected to the respective ratchet wheels 9 and 1.
There is no need to provide it coaxially with 0, and therefore the thickness of the ratchet foils 9 and 10 can be ensured to ensure the meshing area between the ratchet foils 9 and 10 and the ratchets 12 and 13, thereby improving the durability of each part. can be achieved.

Further, since the positions of the ratchets 12 and 13 are switched by the switching cams 29 and 30, the number of parts can be reduced and manufacturing costs can be reduced. Furthermore, in this embodiment, approximately 1/2 of the chevron-shaped cam portion 20b in the feeding cam groove 20
Since the feeding operation of the carriage 5 can be completed within a short period corresponding to the section of , the switching timing of the switching member 23 can be set with sufficient margin.
Moreover, each switching cam 29, 3 of the switching member 23
0 allows the switching state of each ratchet 12, 13 to be maintained, so no load is applied to the step motor 28 other than during the switching operation.

Furthermore, since the switching cams 29 and 30 can hold both the ratchets 12 and 13 in the inactive position approximately in the middle of the range of movement of the switching member 23, the engagement between the drive member 11 and the feed cam groove 20 is prevented. The feeding operation of the carriage 5 can be stopped without being released.

It should be noted that this invention is not limited to the above-mentioned embodiment, and can be embodied in moving body drive devices other than knitting machines.

(Effects of the invention) As detailed above, this invention provides a necessary transmission member coaxially with each ratchet wheel in order to transmit the moving movement of the member that switches and sets the arrangement positional relationship of each ratchet to each ratchet. This makes it possible to secure the meshing area between the ratchet wheel and the ratchet and improve durability.Moreover, by simply reciprocating the switching member within a certain range of movement, the placement position of each ratchet can be changed. This has the excellent effect of being able to reliably switch between the two.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the main parts of a knitting machine that embodies this idea, Figs. 2 and 3 are plan views showing the operating state, Fig. 4 is a sectional view of the knitting machine, and Fig. 5 is a ratchet. FIG. 6 is a partially enlarged sectional view showing the switching member, etc., and FIG. 7 is an exploded perspective view showing the ratchet wheel and overrun prevention member. 1... Needle bed as a support body, 5... Carriage as a moving body, 9, 10... Ratchet foil,
11... Drive member, 12, 13... Ratchet,
23...Switching member, 29, 30...Switching cam, 31, 32...Transmission member.

Claims (1)

[Claims for Utility Model Registration] A movable body 5 mounted on a support 1 so as to be able to reciprocate
and a pair of ratchet wheels 9 and 10 rotatably supported on the movable body 5 around one axis and for moving the movable body 5 forward or backward based on rotation in mutually different directions; A drive member 11 is disposed on the movable body 5 so as to be able to approach and separate from both the ratchet wheels 9 and 10; The drive member 11 is provided so as to be switchable between an operative position in which it engages and a non-operative position in which it does not engage.
a pair of ratchets 12, 13, the one on the operating position side engaging the corresponding ratchet wheels 9, 10 and rotating the ratchet wheels 9, 10 when the ratchet is moved toward the moving body 5; At a predetermined position of the movement, one of the pair of ratchets 12, 13 is switched to the working position and the other to the non-working position, and at the other predetermined position of the movement, the pair of ratchets 12, 13 are switched to the working position and the other to the non-working position. a switching member 23 having switching cams 29, 30 for switching to a position opposite to the above, and the switching member 23 and the pair of ratchets 1;
2, 13, and the switching member 23
The respective ratchets 12, 1 are moved by following the switching cams 29, 30 as they move.
3. A moving body driving device characterized in that a moving body driving device is provided with transmission members 31 and 32 for switching the arrangement of the moving body.