JPH05104142A - Drum for expanding and shrinking - Google Patents

Abstract

PURPOSE:To provide the drum for expanding and shrinking which completely has both functions that the top end of the material of belt sheet, etc., can be easily attached and hardly dropped out, and which can correspond to the multi kinds of material thickness. CONSTITUTION:A flat member 41 which does not expand and shrink a coiling member is provided, instead of a wedge 30, etc., for expanding and shrinking the coiling member 35a, on an arbitrary one piece among plural pieces of the coiling members 35a-35d being in the circumferential direction. One end part of the circumferential direction of the coiling member 35a and the end part of the take-up member being adjacent to the above are formed to a clearance 52 so that the material can be inserted between both end parts in the shrinking time and formed to a clamping parts 50, 51 so that this inserted material is clamped with both end parts in the expanding time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an expansion / contraction drum for winding various materials such as steel strips and wire rods.

[0002]

2. Description of the Related Art A conventional expansion / contraction drum of this type is shown in FIG.
The one shown in 6 is known. The expansion / contraction drum has a rotary shaft 2 supported by a support member 1 so as to be capable of reciprocating in the horizontal direction. The rotary shaft 2 is reciprocally moved by a cylinder (not shown), and is rotated by a motor (not shown) at the time of winding the material. The rotary shaft 2 is covered with a rotary inner cylinder 3 and a rotary outer cylinder 5 which are integrally coupled by a key 6, and is covered with a boss portion 7 for supporting a small diameter front end of the rotary shaft 2 at a tip end portion of the rotary inner cylinder 2. A protective cap 8 that is provided and covers the tip protruding from the boss is attached to the boss. Reference numeral 9 denotes a rotating inner cylinder retaining nut. Four wedges 10 are integrally provided on the outer surface of the rotating outer cylinder 5 at equal intervals in the circumferential direction, and a head 11 having engaging projections 12 on both sides is fixed to the outer surface of the wedge 10. There is.

Numerals 15a to 15d are arcuate winding members for winding the material, which are arranged at positions opposed to the wedge 10 in the radial direction, and have a leg portion 16 on the inner surface, and the engaging convex portion is provided on the leg portion. Engagement recesses 17 are formed so as to be engageably connected to 12 so as not to be able to be pulled out and to be slidable with respect to each other. In the above, the engaging convex portion 12 and the engaging concave portion 17
The wedge 10 and the leg 16 which are connected to each other via an example show an example of the conversion member. Reference numeral 18 is a groove for inserting and locking the tip of the material, for example, the steel strip of this example, and is provided on one winding member 15d.

In such a expanding / contracting drum, as shown in FIGS.
Shows a state in which the winding members 15a to 15d for winding the strip steel are expanded by the forward movement of the cylinder through the wedge 10 and the leg portion 16. In order to wind the strip steel, in the above-mentioned state, the tip end of the strip steel is inserted into the groove 18 to give a habit, and then the motor is driven to rotate the rotary shaft 2.
Then, after winding, the cylinder is actuated to move the rotary shaft 2 back, and the winding members 15a to 15a through the wedge 10 and the leg portion 16 are wound.
After reducing 5d, remove the rolled steel strip.

[0005]

By the way, in the conventional expansion / contraction drum as described above, the groove 18 having a preset size is used.
Since the tip of the strip steel is inserted into and wound up, it is difficult to insert a strip steel with a thickness of 1 to 3 mm, and the thickness of the strip steel with respect to the width of the groove 18 (distance in the circumferential direction). If it is too small, it will come off easily, and if it is too large, it will be difficult to insert it. Therefore, the present invention solves the above-mentioned problems of the prior art, and is equipped with both functions of facilitating insertion of the tip of a material such as a strip steel and difficulty in removal, and an expansion / contraction drum capable of handling materials of various thicknesses. The purpose is to provide.

[0006]

In order to achieve the above-mentioned object, the present invention, in the expanding / contracting drum as described above, replaces any one of the winding members with a converting member for expanding / contracting the winding member. The member which does not provide is provided. In addition, a gap is formed between the one end of the winding member that does not expand and contract in the circumferential direction and the one end of the winding member that is adjacent to the winding member so that the material can be inserted between both ends when contracting. It is formed on the holding part that is held between the parts. The gripping portion has a gripping surface that abuts with a predetermined width in the tangential direction of the winding member during expansion. The holding surface is embedded with an uneven holding member that bites and holds the material during expansion.

[0007]

In order to wind the material, first, the rotary shaft is moved back and the winding member is contracted through the conversion member. At this time, the winding member provided with a member that does not expand or contract does not contract but remains expanded. As a result, a gap is formed between the winding member provided with a member that does not expand and contract and the holding portion between the winding member and the winding member adjacent to the winding member. Next, the winding member other than the winding member provided with the member that does not expand or contract through the conversion member by moving the rotary shaft forward is enlarged. As a result, the tip end portion of the inserted material is held by the holding portion. After being held, the motor is driven to rotate the rotating shaft to wind the material in the same manner as before, and after winding, the cylinder is actuated to move the rotating shaft back, and the member that does not expand or contract through the conversion member. After reducing the winding members other than the provided winding member, the wound material is removed.

[0008]

1 to 4 show an embodiment of the present invention. 1 is a left side view of FIG. 2, and FIG. 2 is a vertical sectional front view in which a part of a winding member is omitted. 22 is a rotating shaft, 23 is a rotating inner cylinder, 25 is a rotating outer cylinder, 26 is a key, 27 is a boss, 30 is a wedge, 31 is a wedge head, 32 is an engaging convex portion, and 35b to 35d are winding. Material, 36,37
Are the leg portions of the winding members 35b to 35d and the engaging recesses, and the members have substantially the same structure as the conventional one.

In the figure, the uppermost winding member 35a does not have the wedge 30, but is provided with a horizontally flat member 41 instead. Further, the leg portion 43 in which the engaging concave portion 44 that slidably engages with the engaging convex portion 42 of the flat member 41 is formed is also flat in the horizontal direction. Therefore, the winding member with the wedge 30
While 35b to 35d can be expanded / contracted, the winding member 35a having the flat member 41 is always expanded and does not contract.

At one end portion of the winding member 35a in the circumferential direction and one end portion of the winding member 35b adjacent thereto, a gap 52 into which a strip steel can be inserted is formed between the both ends when contracted (see FIG. 4). The inserted strip steel is formed on the holding portions 50 and 51 which are held at both ends when enlarged. The holding parts 50 and 51 are the winding member 35 when expanded.
It has holding surfaces 53, 54 that abut with a predetermined width in the tangential direction of a, 35d. As shown in detail in FIG. 3, the gripping surfaces 53, 54 have irregular-shaped gripping members 56, 57 for gripping and gripping the strip steel W at the time of expansion.
Are buried facing each other. Then, when the strip steel W is held, the projection 58 of the holding member 57 fits into the recess 59 of the holding member 56 and holds it so as to bite, thereby preventing the strip W from coming off. As an example of the material of the holding members 56 and 57, when the winding members 35a to 35d are made of mild steel, they are preferably made of hardened steel (carbon steel). In FIG. 2, reference numeral 61 is a nut for preventing rotation of the inner cylinder.

The operation of the above embodiment will be described. In order to wind the strip steel W around the winding members 35a to 35d, first, in the state shown in FIGS.
22 back, and take-up members 35b to 3 through the wedge 30 and the leg 36.
Reduce 5d. At this time, since the engaging projection 42 of the flat member 41 slides horizontally in the engaging recess 44 of the leg portion 43 in the winding member 35a as it is, the winding member 35a does not contract like the winding members 35b to 35d, but expands. It has been left as it is. As a result, a gap 52 as shown in FIG. 4 is formed between the holding members 50 and 51 of the winding member 35a and the winding member 35d adjacent to the winding member 35a, and the tip of the strip W is inserted therein.

Next, the rotary shaft 22 is moved forward by the cylinder, and the expanded / contracted winding member 35 is inserted through the wedge 30 and the leg portion 36.
Enlarge b to 35d. The tip end of the strip steel W thus inserted is held by the convex portions 58 and the concave portions 59 of the holding members 56 and 57 and the holding surfaces 53 and 54 embedded in the holding surfaces 53 and 54 of the holding portions 50 and 51. (Fig. 3). After being held, the motor is driven to rotate the rotary shaft 22 in the same manner as the conventional one, and the strip steel W is wound, and after winding, the cylinder is operated to move the rotary shaft 22 back, and the wedge 30 and the leg are moved. The winding members 53b to 53d are contracted via the portion 36, and then the wound steel strip W is removed.

Since the strip steel W is clamped and wound up by the above-described action, the strip steel W having various thicknesses can be dealt with. Although only the steel strip W is mentioned in the embodiments, the present invention can be applied to other materials such as wire rods. Further, although the rotating shaft 22 reciprocates in the horizontal direction in the embodiment, it is also applicable to the rotating shaft 22 that reciprocates in the vertical direction.

[0014]

According to the first aspect of the present invention, which has the above-mentioned structure, the material is held by the holding portion and wound up, so that it can be applied to materials of various thicknesses and can be inserted into a conventional groove. Compared to the method of inserting it, it is much easier and easier to put in. Since the invention of claim 2 further holds in plane,
Holds securely. The invention according to claim 3 has an excellent effect that the gripping is made more reliable because it is held by being caught by the convex portion and the concave portion of the gripping member.

[Brief description of drawings]

FIG. 1 is a left side view of FIG. 2 showing an embodiment of the present invention.

FIG. 2 is a vertical sectional front view of the same.

FIG. 3 is an enlarged view of part A of FIG.

FIG. 4 is a left side view illustrating the operation.

5 is a vertical side view taken along the line BB of FIG. 6 of the conventional example.

FIG. 6 is a vertical sectional front view of a conventional example.

[Explanation of symbols]

 22 Rotating shaft 30 Wedge 31 Head 32 Engagement convex part 35a to 35d Winding member 36 Leg part 37 Engagement concave part 41 Flat member 42 Engagement convex part 43 Leg part 44 Engagement concave part 50, 51 Holding part 52 Gap 53, 54 Holding surface 56, 57 Holding member 58 Projection 59 Recess

Claims (3)

[Claims] 1. A rotary shaft which is reciprocally movable in the axial direction and is supported by a support member, an operating member which reciprocates the rotary shaft, and a radial expansion / contraction in synchronization with the outer circumference of the rotary shaft. The plurality of arcuate winding members arranged in the same direction and the winding members are connected to the rotating shaft, and the reciprocating motion of the rotating shaft transmits the force in the moving direction at right angles to the moving direction to expand and contract the winding member. A conversion member for winding a material such as a strip steel on the outer surface of the winding member in an expanded state, the winding member being replaced by a conversion member for expanding or contracting any one of the winding members. A member that does not expand or contract the member is provided, and a gap is formed between one end portion of the winding member that does not expand and contract and one end portion of the winding member that is adjacent to the winding member so that a material can be inserted between the both ends when contracting. Hold this insert material at both ends during expansion Expansion and contraction drum characterized by being formed in the part. 2. The expansion / contraction drum according to claim 1, wherein the holding section has a holding surface that abuts with a predetermined width in a tangential direction of the winding member during expansion. 3. The expansion / contraction drum according to claim 2, wherein an uneven holding member for holding and holding the material during expansion is embedded in the holding surface.