JPH07215683A - Rope winding drum - Google Patents

Abstract

PURPOSE:To prevent a rope from being randomly wound and damaged, in a rope winding drum for crane and the like, by winding the rope at multiple layers in order with a spiral rope groove part improved. CONSTITUTION:In a spiral rope groove part 15 where the outer periphery of a winding drum 12 are formed with parallel grooves 15a, 15c and inclined grooves 15b, 15d at two positions respectively in turn, flange inner wall surfaces 13a, 14a in one inclined groove section 15b is formed with an protrusion 16, and the flange inner wall surfaces 13a, 14a between the other inclined grooves 15a, 15d is formed with a recessed part 17 to prevent respective ropes R from being shifted and their pitches from being jumped and wind, in order, the respective ropes at the lower layer in their valley parts in parallel groove sections 15a, 15c, and the respective ropes at the upper layer just above while crossing them over in the inclined groove sections 15b, 15d.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a rope winding drum mounted on a crane vehicle, and more specifically, by improving the rope groove of the winding drum, irregular winding of the rope is prevented.
The present invention relates to a rope winding drum that enables smooth winding and feeding.

[0002]

2. Description of the Related Art FIG. 6 is a schematic front view of a rope winding drum common to the prior art and the present invention, FIG. 7 is a development view of a winding drum outer peripheral surface showing a conventional rope groove, and FIG. 7 is a sectional view taken along the arrow line in FIG. 9, FIG. 9 is a sectional view taken along the arrow line in FIG. 7, FIG. 10 is a sectional view taken along the arrow line in FIG.
FIG. 13 is an explanatory diagram showing a conventional rope winding state in the inclined groove section D.

Next, a conventional technique will be described with reference to FIGS.
Will be described. As shown in FIGS. 6 and 7, the winding drum 1 includes a winding drum 2 and flanges 3 and 4 arranged in parallel at both ends of the winding drum 2, and a spiral rope is provided on the outer peripheral surface of the winding drum 2. Grooves 5 are formed, and in the rope grooves 5, parallel grooves 5a and 5c along the flange inner wall surfaces 3a and 4a in sections A and C,
In the sections B and D, inclined grooves 5b and 5d having an appropriate angle with the flange inner wall surfaces 3a and 4a are formed, and the parallel grooves 5a and 5c and the inclined grooves 5b and 5d are continuous with each other to form a spiral rope. The groove 5 is formed.

Further, in the section B of the rope groove 5, projections 6 having a height (H) extending in the radial direction from the outer peripheral surface of the winding drum 2 are formed on both flange inner wall surfaces 3a, 4a.
The protrusion 6 has a substantially triangular cross-section, and the ridge line formed by the vertices of the substantially triangular cross-section extends in the radial direction from the outer peripheral surface of the winding drum 2 to the outer peripheral ends of the flange inner wall surfaces 3a and 4a. . It should be noted that the ridgeline of the protrusion 6 may extend at least up to the maximum winding layer portion of the rope R in the radial direction of the winding drum 2, and needless to say extend to the outer peripheral edge of the flange.

Next, the operation will be described. Winding drum 1
When is rotated in the direction of arrow E, the rope R usually starts winding from point G of the parallel groove section A, passes along the inclined groove section B, the parallel groove section C, and the inclined groove section D, and follows the spiral rope groove 5. Are sequentially wound from the flange inner wall surface 3a side to the 4a side,
The first layer winding is completed before the section D.

Thereafter, in the section D, the first wound layer is changed to the second wound layer, and in the section A, the second wound layer is completely formed. In the next section B, the rope R of the second winding layer is guided by the protrusion 6 and is displaced by a half pitch in the cross state with the first winding layer,
Then, it is wound in the valley of the rope R of the first winding layer, and the next section D
From the first winding layer to the cross state while being shifted by a half pitch, in the next section A, while being wound in the valley of the rope R of the first winding layer,
The second wound layer is completed before the section D by being wound from the flange inner wall surface 4a side to the 3a side in the direction opposite to the first wound layer. After that, in the section D, the second winding layer shifts to the third winding layer, and in the section A, the third winding layer is completely formed. In this way, when the number of winding layers increases in sequence, it becomes a crossover portion in the section B and is wound right above the lower layer rope while crossing the lower layer rope and shifting by a half pitch. Also, in the section D, the rope R is turned around by the flange inner wall surfaces 3a and 4a even though it becomes a crossover portion, and in the parallel groove sections A and C, the upper layer rope R is wound up in the valley of the lower layer rope R. Sequentially
Multi-layer winding is performed.

Next, the winding drum 1 will be described with reference to FIGS.
Referring to the winding of the rope R by, parallel grooves 5a, 5c interval A, each rope in the second layer R ₇ to R ₁₂ in the valleys of the rope R of the first layer R ₁ to R ₆ in C shown in FIG. 8 R is
Further, the third layer R ₁₃ is formed in the valley of each rope R of the second layer R _{7 to} R _12.
Each of the ropes R to R ₁₈ is sequentially wound into multiple layers. At this time, the width dimension (L) of the winding cylinder is set to be approximately (m + 1/2) times the rope diameter. Here, m is an integer, and FIG.
Taking 0 as an example, m = 6. Further, the rope diameter referred to here means the maximum value of the rope diameters in consideration of variations in the rope diameter actually used. The same applies to the following description. With the above setting, as shown in FIGS. 8 and 10, the rope R of the upper layer is wound up in the valley of the rope R of the lower layer in an orderly manner.

At this time, the height (H) of the protrusion 6 is approximately 1/4 of the rope diameter, and the dimension (L ') between the ridges due to the protrusion 6 is large.
Is set to approximately m (= integer) times the rope diameter, whereby the rope of the upper layer is wound up just above the rope of the lower layer as shown in FIG.

Next, a section B in which the projection 6 shown in FIG. 9 is formed.
In the above, each upper layer rope R crosses over each lower layer rope R and is wound while being displaced by a half pitch, and each rope of the first layer R _{1 to} R ₆ is on one flange inner wall surface 3a side. after taken sequentially around the other flange inner wall surface 4a, the first layer R ₁ by shortening of the rope winding drum width dimension by as projections 6 already described in the second layer R ₇ to R ₁₂ to R
Immediately above ₆ and the third layer R _{13 to} R ₁₈ is wound on this layer in an orderly multilayer manner. At this time, the protrusion 6
The height (H) of the rope is set to about 1/4 of the rope diameter, and the dimension (L ') between the ridges by the projection 6 is set to about m times of the rope diameter (integer). As shown, the ropes in the upper layer are neatly wound directly above the ropes in the lower layer.

[0010]

As described above, in the conventional winding drum 1, in the parallel groove sections A and C, the winding drum width dimension (L) is (L) ≈ (m + 1/2) × rope diameter. Set,
Moreover, both flange inner wall surfaces 3a, 4a of the inclined groove section B
Protrusion 6 is formed on the winding body, and the width dimension (L ') of the winding drum is (L') ≈
The rope R is wound in an orderly manner by contracting m × rope diameter. Conventionally, the winding groove width dimension (L) of the inclined groove section D is the same as that of the parallel groove sections A and C. If the dimension (L) is (L) ≈ (m + 1/2) × rope diameter as it is, the flange inner wall surface 3 of both flanges is used when the diameter of the rope R actually used is almost the expected maximum diameter.
There is a problem in that the ropes are extruded in the lateral direction from a and 4a and a gap is apt to be formed between the ropes, which causes irregular winding.

The inclined groove section D is a section in which the rope R changes direction, and the rope R is lifted up by one layer and the next layer feeding is performed. Therefore, the orderly winding of the rope R in this section D is important. Becomes With respect to the section D of the winding drum 1 in the conventional technique, the rope R is the second layer which is turned from the left side to the right side in the drawing when the first layers R _{1 to} R ₆ are wound. Rope R ₇ is the first layer of rope R
Ideally, it is wound right above ₅ , and geometrically, for that purpose, as shown in FIG. 12, the width dimension (L ″) of the winding cylinder is (L ″) ≈ (m + √3-1) × It is necessary to set the rope diameter, but conventionally, as shown in FIG. 11, (L) ≈ {m +
Since it is set to (1/2)} × rope diameter, the rope R ₆ of the first layer is pushed inward so that the rope R ₇ is pushed inward by the rope R _{6 and} the true of the rope R ₅ . Off the top,
The second layers R _{7 to} R ₁₁ are sequentially shifted to the left little by little, and due to this displacement phenomenon, the third layers R _{12 to} R ₁₇ are displaced by a half pitch and the second layer ropes R ₇ to R ₁₁ are shifted. It is wound up in the valley of R ₁₁ . Therefore, with an unreasonable direction change, the rope R swells in a “<” shape as shown by the chain double-dashed line in FIG. 12, and finally a phenomenon of pitch jumping to the next winding layer occurs, which causes irregular winding, There are problems such as damage to the rope R and hindrance to crane work.

In FIG. 12, the width dimension of the winding cylinder; (L ') =
(L ″) + 2 × {(√3 / 2) d + (1/2) d} =
(M-2) d + (√3 + 1) d = (m + √3-1) d Here, d represents the rope diameter.

The present invention is the conventional winding drum 1 described above.
The rope groove 5 was provided for the purpose of improving this inconvenience, noting that the problem cannot be solved simply by providing a protrusion in one of the inclined sections B and reducing the inter-winding cylinder dimension L. In particular, a rope winding drum that prevents the rope R from dropping in the other inclined groove section D, which is the direction changing section of the rope R, and prevents the formation of gaps between the ropes R, so that the rope can be wound in an orderly manner. It is the one we are trying to provide.

[0014]

In order to achieve the above object, the present invention comprises a winding cylinder and a flange arranged in parallel at the surface end of the winding cylinder, and an inner wall surface of the flange on the outer peripheral surface of the winding cylinder. Two parallel groove portions and inclined groove portions having an appropriate angle with respect to the inner wall surface of the flange are alternately formed in the outer circumferential direction,
The parallel groove portion and the inclined groove portion are spirally connected to each other to form a rope groove, and both flange inner wall surfaces in the one inclined groove section have a substantially triangular shape having an apex directed inward in the axial direction of the winding cylinder. In the rope winding drum provided with the bottom of the protrusion, the concave portions are formed on the inner wall surfaces of both flanges in the other inclined groove section. The innermost winding layer of the rope, which is in contact with the concave portion formed on the inner wall surface of the flange on the rope winding start side, is the second inner layer of the two flange inner wall surfaces on which the concave portion is formed.
Even if the innermost winding layer of the rope, which is the first half and is in contact with the recess formed in the inner wall surface of the flange on the opposite side, is the first half, the recess formed in the inner wall surfaces of both flanges is inclined at the bottom. Even if formed so as to be positioned approximately in the middle of the groove section and formed by the bottom portion and the gently curved portions extending from the bottom portion to the parallel groove sections on both sides in the outer peripheral direction of the winding drum, both flange inner wall surfaces of the concave portion Even if the maximum amount of recess from is about 0.12 times the rope diameter, the recess extends from the outer peripheral surface of the winding drum to the outside in the radial direction of both flanges at least to the range where the rope R of the maximum winding layer portion abuts. You may let me.

[0015]

[Operation] The rope begins to wind from one parallel groove,
When the winding is completed and the winding of each winding layer is completed, a concave portion is formed on the inner wall surface of both flanges while crossing over at one inclined groove portion with protrusions formed on the inner wall surface of both flanges and being wound on the other parallel groove portion. At the other inclined groove part formed, crossover is carried out along with the direction change and the layers are successively wound up, but when winding on this other inclined groove part, the rope on the side of the flange does not shift due to the concave part and it is wound up at an appropriate position. Since each layer is lifted and fed by one layer without falling down, there is no irregular winding phenomenon such as gaps between ropes or pitch jumps, and each rope in the upper layer is wound in order just above each rope in the lower layer.

The innermost winding layer of the rope, which is in contact with the concave portion formed on the inner wall surface of the flange on the rope winding start side, is the second half of the inner wall surface of the flange on which the concave portion is formed, and the flange on the opposite side is formed. By setting the innermost winding layer of the rope that abuts the recess formed on the inner wall surface to be the first half,
The ropes of the second and third layers are wound up just above the ropes of the layer in an orderly manner. The recesses formed on the inner wall surfaces of the both flanges are formed such that the bottoms thereof are located substantially in the middle of the inclined groove sections, and the gradual curves extending from the bottom sections to the parallel groove sections on both sides in the outer circumferential direction of the winding drum from the bottom sections. When the rope is formed by the portion, the winding direction of each rope changes gently, so that it is possible to prevent an unreasonable direction change. At this time, the maximum concave amount S is 1/2 of the difference between the ideal inter-rolling cylinder dimension (L ″) and the conventional dimension (L) in the inclined groove section D, as shown in FIG.
That is, S = (1/2) (L ″ −L ′) ≈ (1/2) {(m + √
3-1) d- (m + (1/2) d} = {(2√3-3)
/4}d≈0.12d is optimal. Here, d represents the rope diameter.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the winding drum of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a development view of the outer peripheral surface of the winding drum 12, FIGS. 2 to 4 are cross-sectional views taken along the line EE of FIG. 1, respectively.
The cross-sectional view taken along the arrow direction Loro, the cross-sectional view taken along the line Ni, and the cross-sectional view taken along the arrow line Har of FIG. 1 are exactly the same as FIG. In the figure, the winding drum 11 is composed of a winding drum 12 and flanges 13 and 14 arranged side by side at both ends of the winding drum 12, and a spiral rope groove 15 is formed on the outer peripheral surface of the winding drum 12. Rope groove 1
As is apparent from FIG. 1, the reference numeral 5 designates sections A and C of the parallel grooves 15a and 15c and the inclined groove 15 as in the conventional rope groove 15 already described.
The sections B and D of b and 15d are alternately continuous so that spiral rope grooves 15 are formed at two locations on the outer peripheral surface, respectively.
Then, both flange inner wall surfaces 13a, 1 of section B of inclined groove sections B, D formed at two positions of the rope groove 15
4a is formed with a protrusion 16 having a substantially triangular cross section as in the conventional case, and since the configuration and operation of the protrusion 16 are the same as those of the conventional art described above, detailed description thereof will be omitted. The dimension (L ') between the ridge lines is set to be an integral multiple of the rope diameter.

According to the present invention, in addition to the one inclined groove section B in which the protrusion 16 is formed, the concave portions 17 as shown in FIGS. 1 and 4 are further formed on both flange inner wall surfaces 13a and 14a of the other inclined groove section D. It is formed. This recess 17 has a bottom 17
a is set to be substantially in the middle of the section D,
The bottom portion 17a is formed so as to be continuous with the gentle curved portion 17b formed in the parallel groove sections A and C which are continuous on both sides. The distance (S) from both flange inner wall surfaces 13a, 14a to the bottom portion 17a of the recess 17 is set to be approximately 0.12 times the rope diameter. Further, the concave portion 17 is formed so as to extend from the outer peripheral surface portion of the winding drum 12 to the outer peripheral end of the flange. The recess 17 may extend in the radial direction of the winding drum 12 to at least the maximum winding layer portion of the rope R, and needless to say extend to the outer peripheral end of the flange.

Next, the operation of the winding drum 11 having the above-mentioned structure will be described. When the winding drum 11 rotates in the direction of arrow E, the rope R normally starts winding from point G in the parallel groove section A, The inclined layer section B, the parallel groove section C, and the inclined groove section D are sequentially wound along the spiral rope groove 15 from the flange inner wall surface 13a side to the 14a side, and before the section D, the first winding layer is formed. Complete. In the parallel groove sections A and C, FIG.
As shown, each rope in the second layer R ₇ to R ₁₂ in the valleys of the rope R of the first layer R ₁ to R ₆ is further second layer R ₇ to R ₁₂
The ropes R of the third layers R _{13 to} R ₁₈ are sequentially wound in the valleys of the ropes R, so that a random winding phenomenon does not occur between the layers of the rope R and the multilayer winding is performed in an orderly manner.

Further, as shown in FIG. 3, in one inclined groove section B where the protrusion 16 is formed, the rope R is connected to the protrusion 16 as shown in FIG.
After the first layers R _{1 to} R ₆ have been wound up by the action of the first layer R _{1 to} R ₆ without being displaced, the second layers R _{7 to} R ₁₂ are formed right above the first layers R _{1 to} R _6.
In addition, the third layers R _{13 to} R ₁₈ are provided directly above the second layers R _{7 to} R _12.
Are successively wound into multiple layers while crossing over. Further, as shown in FIG. 4, the other inclined groove section D in which the concave portion 17 is formed is a section in which the winding layer changes while crossing over at the same time when the direction of the rope R is changed. R _{1 to} R ₆ are wound from the left side to the right side, but the rope R _{6 at the} right end is wound in a state of being shifted outward by the concave portion 17, and therefore, unlike the conventional winding described in FIG. 11, The rope R _{7 at} the right end of the second layer R _{7 to} R ₁₂ is wound right above the rope R ₅ of the first layer, and the rope R _{12 at the} left end is not lifted up by the recess 17, so that the third layer is the third layer. Rope R _{13 is} also wound right above the second layer of rope 11,
As shown in FIG. 5, it is wound in order while crossing over as shown in FIG.

[0021]

As described above, the present invention provides the peripheral surface 2 of the winding drum.
In addition to the conventional rope groove in which a protrusion is formed in one of the inclined groove sections at a certain location, a concave section is formed in the other inclined groove section, and therefore, the winding phenomenon due to the collapse of the rope, pitch jumping, etc. is prevented, and it is tidy. Since the rope is wound, it can be wound and unwound smoothly without causing damage to the rope, contributing to the efficiency of crane work.

[Brief description of drawings]

FIG. 1 is a development view of an outer peripheral surface of a winding drum showing a rope groove according to the present invention.

FIG. 2 is a sectional view taken along the line EE in FIG.

FIG. 3 is a sectional view taken along the arrow direction of FIG.

FIG. 4 is a sectional view taken along the line II-II of FIG.

FIG. 5 is an explanatory view showing a rope winding state in an inclined groove section D in the present invention.

FIG. 6 is a schematic front view of a rope winding drum common to a conventional technique and the present invention.

FIG. 7 is a development view of the outer peripheral surface of the winding drum showing a conventional rope groove.

8 is a cross-sectional view taken along the line EE of FIG.

9 is a cross-sectional view taken along the arrow direction of FIG.

10 is a cross-sectional view taken along the arrow of FIG.

11 is a cross-sectional view taken along the line II-II of FIG.

FIG. 12 is an explanatory diagram showing that the maximum concave amount S≈0.12d.

FIG. 13 is an explanatory view showing a rope winding state in a conventional inclined groove section D.

[Explanation of symbols]

1, 11 ... Winding drum, 2, 12 ... Winding drum, 3, 4, 1
3, 14 ... Flange, 3a, 4a, 13a, 14a ... Flange inner wall surface, 5, 15 ... Rope groove, 5a, 5c, 15
a, 15c ... Parallel groove, 5b, 5d, 15b, 15d ... Inclined groove, A, C ... Parallel groove section, B, D ... Inclined groove section, 6,
16 ... Projection part, 17 ... Recessed part.

Claims (5)

[Claims] 1. A winding cylinder, and a flange arranged in parallel at a surface end of the winding cylinder. The outer peripheral surface of the winding cylinder has a parallel groove portion parallel to the inner wall surface of the flange and a predetermined angle with respect to the inner wall surface of the flange. The inclined groove portion and the inclined groove portion are alternately formed at two places respectively, and the parallel groove portion and the inclined groove portion are spirally connected to each other to form a rope groove, and both flange inner wall surfaces in the one inclined groove section are formed. In a rope winding drum provided with a bottom portion of a substantially triangular protrusion having an apex directed inward in the axial direction of the winding drum, concave portions are formed on inner wall surfaces of both flanges in the other inclined groove section, respectively. Rope winding drum. 2. The innermost winding layer of the rope, which is in contact with the concave portion formed on the inner wall surface of the flange on the rope winding start side, of the inner wall surfaces of both flanges having the concave portion is the second half layer.
2. The rope winding drum according to claim 1, wherein the innermost winding layer of the rope that abuts the concave portion formed on the inner wall surface of the flange on the opposite side is the first and half layers. 3. The recesses formed on the inner wall surfaces of both flanges are formed such that the bottoms thereof are positioned substantially in the middle of the inclined groove sections, and the bottoms and the parallel groove sections on both sides in the outer circumferential direction of the winding drum from the bottoms. The rope winding drum according to claim 1, wherein the rope winding drum is formed by a gently curved portion extending in the direction. 4. The rope winding drum according to claim 1, wherein the maximum concave amount of the concave portions from the inner wall surfaces of both flanges is approximately 0.12 times the rope diameter. 5. The rope according to claim 1, wherein the recess extends from the outer peripheral surface of the winding drum outward in the radial direction of both flanges to at least a range where the rope R of the maximum winding layer portion abuts. Take-up drum.