JP2830721B2 - Front / rear driven piece front / rear position switching device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front and rear position switching device for a front and rear driven piece.

[0002]

An object of the present invention is to advance a front and rear driven piece using one operation of an operating piece that always moves back and forth, and thereafter to stop and hold the front and rear driven piece at an advanced position without receiving the action of the operating piece. Also, by switching the position of the operating piece in the vertical direction, the front and rear driven piece is moved backward using one operation of the operating piece that is continuously moving back and forth, and thereafter, the front and rear driven without receiving the action of the operating piece. An object of the present invention is to provide a front / rear position switching device for a front / rear driven piece that stops and holds the piece at a reverse position. The device of the present invention is configured such that, in combination with an article transport conveyor or the like, the operating piece is moved up and down indirectly by an article moving on the conveyor, so that the operating piece can be detected after the article is detected and after the article passes. It is suitably used for performing a predetermined operation related to the presence or absence of an article by a front and rear driven piece that is moved forward or backward. Please refer to the examples for specific usage.

[0003]

Means for Achieving the Object The present invention employs the following means to achieve the object. That is, the present invention reciprocates in the front-rear direction and also
Oscillating operating piece and actuated by this operating piece
And a front and rear driven piece.
An engagement pin protrudes toward the other side, and an engagement pin is provided on the other side.
A pair of upper and lower
The pin abutment part is provided shifted up and down, and the front and rear
When changing the position, move the operating piece up or down.
To make one of the upper and lower pin contact parts and the engagement pin contact,
The front and rear driven pieces are moved back and forth by the reciprocating drive of
It is characterized by moving .

[0004]

The present invention has the following functions. The operating piece that moves back and forth can be moved up and down as necessary.
The front and rear driven pieces change position between the forward and reverse positions.
Can be changed.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the drawings. In this specification, the front means the right side in FIG. 1, the rear means the left side in the figure, the left means the upper side in FIG. 1, and the right means the lower side in the figure. As shown in FIGS. 1 and 2, the roller conveyor 1 has a base frame 2 and a large number of transport rollers 3 provided at predetermined intervals in the front-rear direction so that the axis of the base frame 2 is oriented in the left-right direction. doing. The roller conveyor 1 includes:
It has a plurality of zones 5 divided at predetermined intervals longer than the article W along the transport direction.

In the zone 5, there are transport rollers 3 which are grouped by four front rollers and five rear rollers, and a sensor roller 6 is provided between the pair of front and rear transport rollers 3.
Is provided. The sensor roller 6 is coaxial with the transport roller 3 on the rear side, and a pair of right and left inverted L-shaped swing levers 7 provided on the base frame 2 so as to be vertically swingable.
The upper arm is rotatably held between the free ends of the upper arm so that the axis is oriented in the left-right direction. Swing lever 7
Since the lower arm thereof is urged forward by the spring 4, the sensor roller 6 is held in a state where it floats above the upper conveying surface of the conveying roller 3 when there is no article W, and the article W Is placed thereon, the upper surface of the sensor roller 6 is lowered by the load of the article W until the upper surface of the sensor roller 6 is flush with the upper surface of the transport roller 3. A link 9 extending rearward is connected to the free end of the lower arm of the swing lever 7, and the rear end of the link 9 is connected to the succeeding side, that is, the zone 5 which is upstream in the transport direction.
Is connected to a switching lever 33 of the front / rear position switching device 30 described later.

As shown in FIG. 3, the transport roller 3 rotates via a bearing 11 such as a bearing with respect to a pivot 10 which is passed between the left and right base frames 2 in a non-rotatable manner. It can be inserted freely. Roller body 3
A transmission portion 12 is provided between the left end of the roller body 3a and the left base frame 2, and an urging portion 13 is provided between the right end of the roller body 3a and the right base frame 2. The transmission unit 12 includes a pivot 10
A drive wheel 14 rotatably fitted to the drive wheel 14, and a friction portion 15 formed by abutment of a right end face of the drive wheel 14 and a left end face of the roller body 3a,
A drive endless chain 16 (see FIG. 4) is mounted on the drive wheel 14 from below.
On the other hand, the urging portion 13 has a cylindrical pressing sleeve 17 fitted to the pivot 10 so as to be able to freely move a little left and right integrally with the right bearing 11, and one end of the pressing sleeve 17 to the right base frame 2. In the state where the other end of the pressing is slidably fitted in the pressing sleeve 17 in the left-right direction, the pressing sleeve 17 has a projecting piece 20 for compressing a spring 19 incorporated in the pressing sleeve 17. The overall configuration of the transmission unit 12, the roller body 3a, and the urging unit 13 constitutes a clutch mechanism for the transport roller 3, and the pressing sleeve 17 is pressed to the left by the spring 19. In this case, the contact pressure at the friction portion 15 is maintained at a predetermined value or more, and the rotational force of the drive wheel 14 is transmitted to the roller drum 3a, thereby rotating the roller drum 3a. Then, by moving the pressing sleeve 17 rightward against the spring 19 from this state, the contact pressure at the friction portion 15 is eliminated (the drive wheel 14 and the roller body 3a separate). The rotation of the roller body 3a stops.

The pressing sleeve 17 is provided with a flange portion 21 on the outer peripheral surface on the right end side. Then, each of the pressing sleeves 17 is fitted into the right base frame 2 in a comb-like manner from the lower side thereof so that the bent upper end corners come into contact with the left side surfaces of the flange portions 21. The sleeve operation piece 23 (see FIGS. 5 and 6) is
It is attached so that it can swing right and left. The sleeve operation piece 23 has a front side corresponding to each pressing sleeve 17 of the transport rollers 3 paired on the front side of the zone 5 and a transport roller 3 paired on the rear side of the zone 5. There is a rear side corresponding to each pressing sleeve 17 (the rear side sleeve operating piece 23 is omitted in FIG. 5). Each sleeve operation piece 23 is provided with a rocking transmission piece 24 extending downward from the hinge portion 26, and the right side surface of the rocking transmission piece 24 protrudes rightward to form a cam on the front side and a rear side. A cam piece 25 whose side is a cam valley is attached.

Next, the front / rear position switching device 30 will be described. As shown in FIGS. 1 to 3, the front / rear position switching device 30 is provided in the lower region of the right base frame 2 below the transport roller 3. As shown in FIG. 5, the front / rear position switching device 30 includes an operating piece 32 which is capable of continuous forward / backward movement and is capable of single-shot up / down movement when necessary.
And a front and rear driven piece 31 that is switched to a forward position or a reverse position by the switch. In this embodiment, the front / rear position switching device 30 is used to swing the sleeve operation piece 23 left and right in response to the vertical movement of the sensor roller 6 (the swing of the swing lever 7). In this case, the clutch mechanism is operated or returned to a non-operating state.

The front and rear driven piece 31 is formed by using a channel steel which is long in the front and rear direction in a state where its groove faces the right base frame 2. A pair of front and rear cam followers 45 exposing a part of the outer peripheral portion to the left from an opening 47 (see FIG. 7) formed through the hole are provided so as to be horizontally rotatable by a vertical shaft 44. A pair of front and rear sliding guide rollers 43 exposing a part of the outer peripheral portion from the inside of the groove toward the right base frame 2 is provided to be horizontally rotatable by a vertical shaft 42. The vertical shaft 42 of the sliding guide roller 43 has a length that penetrates and protrudes from the upper and lower surfaces of the front and rear driven piece 31, and the protruding portion is fixed to the right base frame 2. It is adapted to be fitted into a long slot 39 formed before and after formed on the upper and lower surfaces of 37. Therefore, the assembly of the sliding guide rollers 43 and the vertical shaft 42 is performed by the front and rear driven
1 is fitted to the bracket 37, and these front and rear driven pieces 3
1 and the bracket 37 are attached in parallel. Accordingly, the front and rear driven piece 31 can freely move back and forth within a range where the vertical shaft 42 is allowed to move back and forth in the long hole 39. It goes without saying that the right-facing outer peripheral surface of the sliding guide roller 43 always comes into contact with the inner surface of the bracket 37 (see FIG. 7). When the left-facing outer peripheral surface of the follower 45 contacts the cam valley of the cam piece 25 provided on the sleeve operation piece 23, and when the front and rear driven piece 31 is at the position after the forward movement, the left-facing outer peripheral surface of the cam follower 45 , And comes into contact with the cam ridge of the cam piece 25. That is, as the front and rear driven piece 31 moves forward, the sleeve operation piece 23 swings as shown in FIG. 6 to strongly press the flange portion 21 of the pressing sleeve 17 rightward, thereby operating the clutch mechanism (cutting off the transmission). Conversely, when the front and rear driven piece 31 moves backward from this state, the sleeve operation piece 23 is returned to an angle at which the sleeve operation piece 23 is lightly in contact with the flange portion 21 of the pressing sleeve 17, and the clutch mechanism is deactivated (transmitted state). . At the front end of the front and rear follower piece 31, an engagement pin 46 that projects horizontally to the left is attached.

The operating piece 32 is provided with an eccentric cam 35 described later.
And a switching operation part 52 protruding rearward from the cam fitting part 51. The switching operation portion 52 is formed with an engagement pin passage 53 to which the engagement pin 46 of the front and rear driven piece 31 is fitted and which is open at the rear end and in the left-right direction. A guide pin 56 projecting horizontally from the position to the right of the operation piece 32 is attached.

A drive shaft 34 passed between the left and right base frames 2 in a region below the transport roller 3 is provided on the cam fitting portion 51.
An eccentric cam 35 attached so as to rotate integrally with the eccentric cam 35 (see FIG. 3) is rotatably fitted. A drive wheel 36 is attached to the left end of the drive shaft 34, and the drive endless chain 16 (see FIG. 4) can be hung from below the drive wheel 36. Rotates at all times when the drive endless chain 16 is driven. The direction of rotation is counterclockwise. A switching lever 33 is rotatably fitted to the drive shaft 34 so as to be positioned between the operating piece 32 and the front and rear driven piece 31. The switching lever 33 is connected to the link 9 and interlocks with the swing of the swing lever 7 (see FIG. 2). When the sensor roller 6 is in a floating state, the rear end thereof swings. It is held at the lower limit position of the movement range, and when the sensor roller 6 descends, the rear end is swung to the upper limit position of the swing range. The rear end portion is always located below the guide pin 56, and when the switching lever 33 swings upward, that is, when the sensor roller 6 is lowered, the rear end portion comes into contact with the guide pin 56, and the operating piece 32 itself Is swung upward. With such a configuration, when the drive shaft 34 rotates, the switching piece 52 tries to swing in the same manner as the cam fitting part 51 performs eccentric rotation when the drive shaft 34 rotates. Since the switching lever 33 is on standby below 56, engagement of the guide pin 56 from moving downward more than necessary is prevented, and the rotation direction of the drive shaft 34 is counterclockwise. Therefore, the guide pin 56 has a function of pushing down toward the switching lever 33, and as a result, only the reciprocating movement in the front-rear direction can be efficiently extracted from the operating piece 32.

The engagement pin passage 53 of the switching operation section 52
Is an upper side opening portion that is long in the front-rear direction with a rear end opened,
The upper opening has a lower opening that is long in the front-rear direction and is shifted to the lower side and the front side so as to partially communicate with the upper opening. As shown in FIG. 8, in a portion where the upper and lower opening portions communicate with each other, a front opening edge of the upper stage opening portion has a pin pressing portion 55 (an upper pin as defined in the claims).
The rear opening edge portion of the lower opening portion is a pin pulling portion 54 (lower pin contact portion in the claims ) . The front-rear dimension between the pin pressing portion 55 and the pin pulling portion 54 is at least the diameter (engagement) of the engaging pin 46.
Is larger than the longitudinal width) of the pin 46, also opening height dimension of the vertical direction in this portion, according to the orientation swing operating piece 32, the upper side opening portion and a lower side opening for engagement pin 46 It is formed in such a size that the fitting with the part is just switched. Further, the length of the lower opening in the front-rear direction is equal to or greater than the sum of the front-rear movement stroke of the operating piece 32 and the diameter of the engaging pin 46. With such a configuration, when the sensor roller 6 is in the floating state, and the switching lever 33 and the operating piece 32 are both moving down while maintaining the lowered state, the operating piece 32 moves forward and backward as shown in FIG.
(A) As shown in FIG.
The upper side opening portion is fitted, and the engaging pin 46 comes into contact with the pin pushing portion 55 and is pushed backward, so that the pin pushing portion 55 is positioned at the backward limit position. As a result, the front and rear driven piece 31 is set in a state of moving backward by a predetermined amount,
As described above, the clutch mechanism maintains the inoperative state (the transmission state) via the sleeve operation piece 23. Thereafter, even if the operating piece 32 repeatedly moves back and forth, the pin pressing portion 5
The position of the front and rear driven piece 31 after the backward movement is maintained because the 5 does not press the engagement pin 46 further. On the other hand, when the sensor roller 6 is lowered by the article W, the operating piece 32 also swings upward with the swinging of the switching lever 33 upward, and as shown in FIG. The lower opening of the engagement pin passage 53 fits into the pin 46. Therefore, the engaging pin 46 is
4 and is pulled back forward.
At the forward limit position. As a result, the front and rear follower piece 31 advances by a predetermined amount, so that the clutch mechanism is activated (the transmission is disconnected) via the sleeve operation piece 23 as described above. Thereafter, even if the operating piece 32 repeats the forward and backward movement, the pin pulling portion 54 further
6 is not pressed, the position of the front and rear driven piece 31 after the forward movement is maintained.

The transport rollers 3 in the foremost zone 5 of the roller conveyor 1 are always rotated by a drive endless chain 16 or the like (see FIG. 4).

In this embodiment, the conveying roller 3 which requires an acting force in a direction orthogonal to the conveying direction of the roller conveyor 1
Is switched between an active state and a non-operative state by a front / rear position switching device 30 that generates an acting force in the conveying direction of the roller conveyor 1. It only needs to be attached to Therefore, there is an advantage that the structure of the roller conveyor 1 can be simplified and the size thereof can be suppressed.

[0016]

Next, the operation of the embodiment will be described. In a state where all the sensor rollers 6 have not detected the article W,
All the transport rollers 3 in all the zones 5 are rotating.
When the sensor roller 6 is lowered by the lifting of the article W being conveyed, through the swing lever 7 and the link 9,
The front / rear position switching device 30 of the zone 5 subsequent to the zone 5 where the sensor roller 6 is located is operated, and as described above, the front / rear position switching device 30 causes the rearward zone 5 to move.
Are operated, and the rotation of the transport roller 3 is stopped. It should be noted here that the article W conveyed on the conveying roller 3 only lowers the sensor roller 6 to swing the operating piece 32 up and down, and utilizes the load of the article W. The fact that the front and rear driven piece 31 is not directly moved forward (the same applies to the subsequent backward movement) but the front and rear driven piece 31 is actually moved back and forth is due to the rotation of the drive shaft 34 by the drive endless chain 16. It is in the point. Therefore, the operation and non-operation of the clutch mechanism can be reliably switched regardless of the weight of the article W.

As described above, when the rotation of the transport roller 3 is stopped, the following article W is once stopped immediately before the article W collides with the article W if the article W is immediately ahead.
Therefore, the article W does not push the article W in front or collide with the article W in front. Since the transport roller 3 in the front zone 5 is constantly rotating, the front zone 5
Gradually returns to the state in which the article W is not detected (floating state) from the sensor roller 6 of
Of the front / rear position switching device 30 is restored to the initial state, and the clutch mechanism is returned to the inoperative state. Therefore, the article W once stopped as described above is sent forward again.

[0018] The engaging pin 46 provided on the operating piece 32, the front and rear sub
It is also possible to provide the moving piece 31 with a pair of upper and lower pin contact portions . The front / rear position switching device 30 as a whole is rotated by 90 ° so that the swing direction of the operation piece 32 is horizontal.
It is also possible to use it in a reclined state. The present invention can be used everywhere as a mechanism for changing the position of the front and rear driven piece 31 between the forward position and the reverse position. In addition, the detailed configuration, shape, and the like can be appropriately changed.

[0019]

According to the present invention, the following configuration is provided.
It has the following effects.  To move the operating piece that moves back and forth up and down as necessary
The position of the front and rear followers is changed between the forward position and the reverse position.
Can be made.The front and rear driven pieces are operated by reciprocating working pieces
It can be moved back and forth.
Since it is not moved back and forth, that is,
Even if it takes considerable force to move back and forth,
Requires no force, so the vertical movement of the operating piece itself can be
You can do it. As a result, the operation of the embodiment (paragraph number)
No. 0016) has the effect described above.

[Brief description of the drawings]

FIG. 1 is a partially crushed plan view showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view taken along line II-II of FIG.

FIG. 3 is an enlarged sectional view taken along line III-III of FIG. 1;

FIG. 4 is a diagram schematically showing a driving mechanism.

FIG. 5 is an exploded perspective view of the front / rear position switching device.

FIG. 6 is an enlarged sectional view taken along line VI-VI of FIG. 2;

FIG. 7 is an enlarged sectional view taken along line VII-VII of FIG. 5;

FIG. 8 is an explanatory diagram of the operation of the operation piece.

[Explanation of symbols]

 Reference Signs List 30 front / rear position switching device 31 front / rear follower piece 32 operating piece 46 engaging pin 53 engaging pin passage 54 pin pulling section(Lower pin contact part)  55 Pin pusher(Upper pin contact part)

Claims (1)

(57) [Claims] 1. A reciprocating drive in a front-rear direction and a vertical direction.
Operating piece that swings
Operating piece or front and rear driven piece
An engagement pin protrudes toward one of the
Is the upper and lower one that contacts the engagement pin and moves the front and rear driven piece back and forth.
A pair of pin contact parts are provided vertically shifted,
When switching between front and rear positions, move the operating piece up or down.
To move one of the upper and lower pin contact parts into contact with the engagement pin.
And the front and rear driven pieces are reciprocated by the
A front / rear position switching device for a front / rear driven piece, which is moved back and forth.