JPH09240872A - Roll feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To release a feed roll at a high speed by lightening a roll support mechanism and also support the feed roll precisely for a long term by eliminating a slide part from the support mechanism. SOLUTION: A support body 4 is installed on a machine frame 10 in both holding state by right/left two sheet springs 6. Both ends of respective sheet springs 6 are jointed to the projection pieces 7 of the support body 4 and the support tools 8 of the machine frame 10 respectively and unslidably by bolts 9. The support body 4 is displaced vartically by operation members like a cylinder or cam and a feed roll 2 is contaced or released for a carried article 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll feeder that conveys an object to be conveyed such as a plate material or a long material by rotating a roll.

[0002]

2. Description of the Related Art For example, when a work material is sequentially fed and pressure-molded by a press machine, a pilot pin is inserted into a hole of the work material in a stopped state to accurately position the work material with respect to a mold. To do. At this time, in the roll feeder, it is necessary to release the feed roll from the work material so that the work material can freely move. As a conventional roll feeder having this type of releasing function, for example, the techniques shown in FIGS. 4 and 5 are known.

The roll feeder shown in FIG.
1 is supported by a shaft 24 so as to be swingable up and down via a support 23, and the tip end of the support 23 is lifted by an operating member (not shown) to release the feed roll 21 from the transported object 1. Has been done. In the roll feeder of FIG. 5, the feed roll 21 is supported by the sliding groove 28 of the guide 27 via the support body 23 so as to be able to move up and down, and the support body 23 is lifted by an operating member (not shown) to move the feed roll 21. It is configured to release from the transported object 1. As the operation member, a mechanism for contacting or releasing the feed roll 21 with respect to the object to be conveyed 1 by a spring, an air cylinder, or a cam is conventionally known, and in a press machine, a feed lever 21 is used to move the feed roll 21 with a lifting body. A mechanism for operating the roll 21 is also known.

[0004]

By the way, in the press machine, the feed roll 21 is used in accordance with the speeding up of the progressive feeding process.
It is necessary to perform the releasing operation in 5/1000 seconds. However, the conventional roll feeder has a problem that it is difficult to cause the feeding roll 21 to perform the releasing operation at a high speed because the support body 23 has a large mass, and a large power is required for the operation member. Further, when the frequency of releasing increases, the shaft 24 and the groove 28
The sliding rollers, etc., are likely to wear, and the spacing between the feed roll 21 at the release position and the object to be conveyed 1 (about 0.1 to 1 mm) may vary. There was also a problem that it decreased.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to reduce the weight of the roll support mechanism so that the feed roll can be released at a high speed and at the same time eliminate the sliding portion from the support mechanism to ensure the precision of the feed roll for a long period of time. It is to provide a roll feeder that can be supported.

[0006]

In order to solve the above problems, the roll feeder of the present invention is constructed by supporting a feed roll by a leaf spring so as to be capable of coming into contact with and separating from an object to be conveyed.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a first embodiment of the present invention. In this roll feeder, a feed roll 2 is provided above the transported object 1, and a driven roll 3 is provided below the transported object 1. The feed roll 2 is rotatably supported by a shaft 5 on a support 4 which is smaller than the conventional one, and is driven by a motor (not shown).

The support body 4 is attached to the machine frame 10 in a supported state by two leaf springs 6 on the left and right sides. Both ends of each leaf spring 6 are non-slidingly connected to the projecting piece 7 of the support body 4 and the support tool 8 of the machine frame 10 by bolts 9, respectively. Then, the leaf spring 6 causes the feed roll 2 to move the object to be conveyed 1 via the support 4.
It is supported so that it can move up and down.

In this roll feeder, when an operating member (not shown) is urged, the support 4 is pushed down, and the leaf spring 6 is bent against its own elasticity, as shown in FIG. The feed roll 2 is brought into pressure contact with the transported object 1, and in this state, the transported object 1 is transported as the feeding roll 2 rotates. Further, when the operation member is deenergized, as shown in FIG. 1, the elasticity of the leaf spring 6 lifts the support body 4,
The feed roll 2 is spaced from the object 1 by a predetermined distance (0.1 to 1 m).
It is released after about m), and the transported object 1 is stopped by this. Since the feed roll 2 is supported on both sides by the two leaf springs 6, the supporting tool 8 slightly deforms as the roll 2 moves up and down, and the leaf spring 6 is allowed to bend.

Therefore, according to the roll feeder of this embodiment, since the feed roll 2 is supported on both sides by the two leaf springs 6 via the support 4, the mass of the support 4 can be reduced and the feed can be performed. The roll 2 can be operated at high speed with a low-capacity operating member. Further, since there is no sliding portion in the roll support mechanism, there is no fear of wear, and the distance between the feed roll 2 at the release position and the object to be conveyed 1 is always kept at an appropriate value to keep the feed roll 2 for a long period of time. It can be accurately supported.

FIG. 3 shows a second embodiment of the present invention. Here, the support body 4 is attached to the lower surface of the intermediate portion of one leaf spring 6 by a bolt 9, and the feed roll 2 is supported by the support body 4. According to this configuration, there is an advantage that only one leaf spring 6 is required and the support body 4 can be made compact and lightweight.

In the above embodiment, the number of feed rolls is 2
The structure is supported by one or one leaf spring, but it is also possible to support by a total of four leaf springs, one on the left and one on the right, or a total of more leaf springs, or one leaf spring. It is also possible to employ a laminated type in which a plurality of perimeters are laminated, and the support structure of the leaf spring is not limited to the above-mentioned embodiment.

[0013]

As described in detail above, according to the present invention,
Since the feed roll is supported by the leaf spring so that it can be brought into contact with and separated from the transported object, the roll support mechanism can be made lighter in weight and the feed roll can be released at high speed, and the sliding part can be removed from the support mechanism. It has an excellent effect that the feed roll can be supported accurately for a long period of time without it.

[Brief description of drawings]

FIG. 1 is a front view of a roll feeder showing a first embodiment of the present invention.

FIG. 2 is a front view showing the operation of the roll feeder.

FIG. 3 is a front view of a roll feeder showing a second embodiment of the present invention.

FIG. 4 is a front view showing a conventional roll feeder.

FIG. 5 is a front view showing another conventional example.

[Explanation of symbols]

1 ... Conveyed object, 2 ... Feed roll, 4 ... Support, 6
..Leaf springs, 8 ... supports, 9 ... bolts, 10 ... machine frames

Claims (1)

[Claims] 1. A roll feeder in which a feed roll is supported by a leaf spring so as to be able to come into contact with and separate from an object to be conveyed.