JPS588859A - Intermittent feed mechanism - Google Patents

Abstract

PURPOSE:To obtain a highly durable and reliable intermittent feed mechanism, by releasing, upon normal intermittent feeding, a positioning means from a driven member synchronously with the feeding motion of the driven member caused by a drive member so that load due to the positioning means is alleviated. CONSTITUTION:There is provided a driving means 10 in which a feed pawl 11 and a drive member 12 are rotatably journalled to a shaft 13, the drive member 12 receiving power from a pin 15 engaged with a cam 21 for actuating around a supporting point as the rotational center thereof. Further, there is provided a positioning means 16 in which one end 17a of a positioning member 17 is engaged with a driven member 9, and a pin 18 at the other end 17c receives power from the cam 21 and is guided by a guide member 23 so that the lever 17 is rotated about a fulcrum 17d. In this case, the fulcrum 17d is depressed to a retainer part 19 by means of a spring 20 loaded to the above-mentioned lever 17. Further more, the cam 21 is rotated in such a way that the positioning means 16 is released from the driven member 9 in synchronism with the operation of the latter caused by the drive means 10. With this arrangement, the load of the positioning means 16 is alleviated upon normal intermittent feeding.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an intermittent feeding mechanism that feeds a given amount while moving intermittently.

Conventionally, the intermittent feed mechanism uses a ratchet and pawl, and the feed mechanism uses an intermittent gear.

A number of mechanisms have been devised, such as the Geneva-based feeding mechanism and the feeding mechanism using worm gears, among which the driven body that moves intermittently is affected by external forces. □□ Many devices are equipped with a positioning means, and a conventional example thereof will be explained with reference to the drawings. FIG. 1 shows a rotating body with a ratchet as an example of the driven body l. 2 and 3 are schematic operation diagrams, in which 1 indicates a driven body and 2 indicates a driving means, which is composed of a feeding claw 3 and a driving member 4. Reference numeral 5 denotes a positioning means for the driven body 1, which includes a positioning lever 6 and a shaft 7.
It is composed of 8 springs and 1 spring. The driven body IJd receives the movement of the driving member 4 of the driving means 2 in the direction of the arrow M by the claw 3, and rotates in the B direction. At this time, 1 positioning means 5
Against the spring 8 mounted on the positioning lever 6 6h,
Using 6e as a fulcrum, it turns over while engaging 6g with the driven body l. 1 [In order for the moving hand R2 to complete the operation, the 1 positioning means 5 as shown in Fig. 82.

The positioning lever 6 68 firmly positions the driven body 1 so that the driven body 2 does not move easily. In this state, even if an external force is applied to the driven body 1, it will not move easily, and even during continuous intermittent feeding, there will be little variation in the feed pitch.

A, L swivel spring 8#''j realizes reliable intermittent feed In order to satisfy the above-mentioned function, a spring with a strength of 9 strong is used, and the drive means 2 has sufficient feed. Each member must be made of solid wood to ensure sufficient durability.A shocking force is applied when the driven member 1 of the drive means 2KFi is moved, and the impact on other mechanisms may also be affected. be.

The present invention eliminates such drawbacks, and its primary purpose is to synchronize the positioning means with the movement of the driven body by the driving means, to release the positioning means from the driven body when the driven body is being fed, and to position the positioning means when the driven body is not in motion. The main purpose of WCxD is to reduce the driven member feed load, and to improve durability since the contact under high pressure is 1 kVh, it is necessary to create a stable one-wheel intermittent feed mechanism.

The present invention will be described in detail below based on Examples.

FIGS. 4, 5, and 6 are schematic operational diagrams of the main flow side. In the 4th WJK, 9 is the driven body and W is the driver 1
9.16 is a positioning means. The driving means 1O has a feed claw 11 and a driving member 10 rotatably supported by a shaft 13, a driving member 12 and 14 as the center of rotation, and a bottle 15 that engages with a cam 21 receives force from the cam 4 to operate. When the zero positioning means 16 is reached, one end 17a of the lid-closing lever 17 engages with the driven body 9, and the bottle 18 of the -ajl 17C is turned on.

It receives force from the cam 4 and rotates around 17d while being guided by the guide 23.

The positioning levers 17a and 174 are mounted with KFi springs, and the fulcrum 17d is pressed against the support portion 19. The cam 21 rotates around the axis n and applies force to the driving means 10 and the positioning means 16 while synchronizing them. This figure shows the positioned state after the driven body 9 has been fed by a predetermined amount.

FIG. 5 #i shows a koji state in which the driving means 1O sends the driven body 9 by a predetermined amount. 2nd positioning tool II on this forwarding floor! 16 #i, one end 17c of positioning lever 17
However, while interlocking with the movement of the driving means 10, the driven body 9
Away from.

Be careful not to be forced to move by the driven body 9.
In order to do this, the driving means lO and the positioning means [16 is the cam 21]
This allows for perfectly synchronized movement.

When the driven body 9 of the driving means W is being fed, the positioning means 16 escapes from the driven body 9, and when the driven body 9 of the driving means IO is not being fed, the positioning means 16 is moved as shown in FIG.

Position and fake the driven body 9. The positioning lever 17 is equipped with a strong spring force at 17& near the center of rotation a1, and the fulcrum 17d is pressed against the leaf receiving part 19. During the operation shown in Figure 5, the spring force applied by the spring is mounted near the fulcrum 17d of the positioning lever 17, so it hardly becomes a load. When the driven body 9 is fed by a predetermined amount at a time, no load is applied to the driving means 10 and no load is applied to the cam 21.

111611#i, when external force 10 is applied to driven body 9,
176 of the 1-positioning lever 17 in the 1-positioning means 16 deviates from the predetermined position, the driven body 909
A force is applied in the direction of arrow O. Konoto self-blade mu 2
1 stops and 1 positioning lever 17 17a
Part pin 18#i does not move and 1 positioning lever I7#'i.

176 (bin 18) as a fulcrum, it rotates against the spring 20. At this time, the 174 of the first positioning lever 17 and the receiver are separated from the part 19#i, so that the bin 18 is guided by the guide 23 and moves to LnJ. Because of this, I was disappointed that it was out of place. Spring I is a strong spring, and 17α of positioning lever 17
Press firmly on the 98th tooth. Accordingly, the driven body 9 moves in the direction of stabilization, and becomes as shown in Fig. 4 of the irises. This function is no different from conventional positioning means.

The practical side of the present invention has been explained in detail above, but in a simple intermittent feed mechanism having a positioning means, normal intermittent feed p
By synchronizing the positioning means, which is sometimes a heavy load, with the actuation of the driven body by the drive means and releasing the driven weight, the load during normal transport can be reduced.6 In addition, the load on the positioning means during normal transport can be reduced. With this invention, which performs exactly the same function as the conventional positioning means, the load on the driven body is reduced, and the durability is improved because there is no contact under high pressure. Therefore, it is possible to provide an intermittent feed structure with stable M-axis properties. In the embodiment of the present invention, the Fi driven body is rotated, but it can be easily applied to a type in which the Fi driven body is fed linearly. Furthermore, the intermittent feeding mechanism on the actual flow side has a very wide range of applications, including paper feeding mechanisms such as printers and head feeding and return.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the driven body, and Figures 2 and 3 are schematic operation diagrams of a conventional intermittent feed mechanism with positioning means. FIG. 4, FIG. 5, and FIG. 6 are schematic operational diagrams showing one embodiment of the present invention. 9...Followed body 10...Driving means 16-...Positioning means 17...Positioning lever 19...Receiver part Addition...Spring 21+1...Cam or more Outer 1 person Shinshu Seiki Co., Ltd. Attorney Liability Volume Figure 2 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] A driven body that is sent while intermittent crawling by a predetermined amount;
In the intermittent feed mechanism, one positioning means is released from the driven body in synchronization with the operation of the driven body by the driving means, since the driving means for driving the driven body and the positioning means for determining the position of the driven body are used. An intermittent feed mechanism characterized by: (1) The positioning means has a positioning lever and a spring. The positioning lever is mounted near the center of rotation of the positioning lever while being pressed by one side, one side engages with the driven body, and the other side engages with the drive means. Scope of patent claims @
l The intermittent feeding mechanism described in the first top.