JPS60102433A - Lower box of polyp-type bucket - Google Patents

Abstract

PURPOSE:To make the outside shape of a lower box smaller by a method in which brackets to pivotally support the bucket arm to the lower box are projectionally provided by the number of the bucket arms and the interval between the backet arms is widened. CONSTITUTION:A lower box 2 is set below an upper box 1 in a vertically movable manner, and brackets 12 projectionally provided by the number of bucket arms 3 from the case 9 of the lower box 1 are pivotally supported on the upper end of the bucket arms 3 of an arc form in which the central part is curved outwards. The central part of the bucket arms 3 and the upper box 1 are pivotally connected with a rod 4. Since the bucket arms 3 can be pivotally supported by 1/2 the conventional number of brackets and the interval between the adjacent brackets can be widened, the outside size of the lower box can be made smaller than the conventional ones.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a lower box of a polytube type packet used for excavation/dredging work, moving work of two-tube blocks, etc.

[Explanation of polytub type packet] Polytub type packet is as shown in Figs. 1 and 2.

An upper box with supports that suspend the entire packet (
1), a lower box (2) that is arranged below the upper box (1) and can be raised and lowered freely; an arc-shaped bucket tom (3) that is arranged around the lower box and whose central part is curved outward;
a number of rods (4) corresponding to the packet arms (3);
and a lifting device (8) that lifts and lowers the lower box (2).
It is composed of the following.

As shown in Fig. 1, the lifting device (8) is equipped with a sheave (5) in the upper box (1) and a sheave (5') in the lower box (2), and a wire (6) is attached to each sheave. ), and as shown in Figure 2, the upper end is connected to the upper box (1).
Generally, a fluid pressure cylinder (7) whose lower end is pivoted or fixed to the lower box (2) is used, but in both cases, the lower box (2) moves up and down to The common feature is that the arm (3) has an opening/closing action.

Such polytub type packets are as shown in Fig. 5.
The lower box (2) descends, and the throat arm (6)
) in its most open position, it may fall onto objects such as pebbles, rocks, scraps, etc. (sometimes with a shocking fall), and the lifting device (
As the lower box (2) is pulled up by 8), the tip of the packet arm (6) moves forward in the direction of the center line rY-Yj (hereinafter referred to as [center line Y-Y]) of the kerato. By doing so, the object is excavated or grasped.

Depending on the object, it may be placed under or between the objects.

In some cases, the tip of the packet arm (3) bites and not only pulls up the lower box, but also lowers the upper box (1) and brings them closer to each other.

[Problems with conventional technology]

0) Therefore, in polytub type packets.

Each member is required to have the strength to withstand a shocking fall onto the object, and the strength to pull the object in the center line Y-Y direction and firmly grasp it, but the upper box (1) and the lower box (
2) are each fitted with an end of a lifting device (8), and the upper box (1) is fitted with a rod (4) (usually 6
Since the upper part of the packet arm (3) is pivotally connected to the lower box (2) and the upper part of the packet arm (3) is connected to the lower box (2), the structure is complicated and easily damaged, so it has to be made strong. ,
It was heavier than necessary and the manufacturing cost was also high.

(b) Also, after the packet descends or falls onto the object, the lifting device (8) is activated to pull up the lower box (2), as shown in FIG.

The effect of the tip of the packet arm (6) pulling the object in the center line Y-Y direction and gripping it strongly is due to the rotation of the lower part of the rod (4), apart from the length of the rod (4) and its angle of inclination. Dynamic fulcrum B and upper rotation fulcrum A of the packet arm (6)
(Fig. 6 AB) and the ratio of the distance between the rotation fulcrum B and the tip C of the packet arm (6) (Fig. 6 section), but the door may be made larger than B'5. Various efforts have been made to improve the effect by moving the point B further outwards with respect to the center line Y-Y.
The inclination angle of the rod (4), the angle between the straight line AB and the straight line Be, and also.

Since it is difficult due to the relationship and limitations with packet capacity, etc., the structure will inevitably bring point A closer to the center line Y-Y direction, so the lower case (9) shown in Fig. 6 should be reduced. However, the conventional lower box (2) has a structure in which the upper part of one packet arm (3) is supported by a pair of brackets (1) and (10) via the bottle (11) L7. Now, when the lower case (9) is reduced, as shown in FIG.
) is rotatable when the bottle (11) is connected,
Since it comes into contact with the adjacent bracket 06) (in Fig. 6, it is impossible to insert the D forcefully), move the point A (Fig. 6) to the center line Y-
There is a limit to how close you can get to the Y direction (11)
I had a hard time installing and removing it.

(c) Furthermore, for the above reason, the adjacent bracket (
Since the bottle (11) must be made as short as possible so as not to come into contact with the packet arm (6), a pair of brackets (1) and (1) (6th
Since the width of the upper part of the packet arm (6) and the bracket (10) must be held in place,
(The width of No. 1 that pivots both ends of the bottle (11) is also narrower.

As a result, the outer periphery of the bottle (11) and the hole on the top of the packet arm (5) were worn out due to strong surface alignment.
The bracket 00) was frequently damaged due to the twisting of the bracket 3).

) The difficulty of having to shorten the length of the hole at the top of the packet arm (3) mentioned above extends to the manufacturing of the packet arm (3), as shown in FIG. Since the width must be gradually narrowed upward from the width to the width S at the top, the shapes of the related parts become unnecessarily complicated and the manufacturing cost increases.

(e) On the other hand, the polytub type packet has a packet arm (
3) falls onto the object in the open state (Fig. 6), and the tip of the packet arm (3) is below the object.

Alternatively, the amount and effect of gripping can be increased by biting into the packet arm (6), but in order to increase the effect, a moderate amount of weight is required, but with the packet arm (6) open, This biting effect due to its own weight is mostly due to the weight of the packet arm (3), rod (4), and upper box (1), and the lower box (2) located on the center line Y-Y. Despite the fact that the effect of p: fi: is not expected to be much, the lower VC box is heavier than necessary due to the reasons in G) and Naka) above. (It would be theoretically better to reduce the weight of the lower box (2) and increase the weight of the part where the weight is effectively applied to the packet arm (3), but this was not possible.) [The present invention] [Objective] The present invention aims to solve the above-mentioned conventional problems by changing the structure of the lower box (2), that is, the number of brackets.

[Explanation of the configuration of the present invention using embodiments]

The present invention is characterized in that the lower case (9) has a five-ring shape, a cylindrical shape, or a polygonal ring shape or a polygonal tube shape corresponding to the number of keratoarms (3). The lower box (
2) has a major feature in its structure.

The present invention will be explained below with reference to Examples. All the brackets in the embodiment are nine brackets of the present invention, and the number is the same as the number of packet arms (5), so the explanation of the number of brackets will be omitted. The diameter of the bottle (11) actually used in the lower box is 80 mm, and the length of the pin (11) is carefully measured from the outer circumference of the lower case (9) to 130111 mm.
1. This is for a polytube-type packet with a capacity of 1 or 5 doors with 6 keratoarms (3), and for comparison,
It is shown to the same scale as the conventional lower box (FIG. 6).

α, Example 1 In Example 1 shown in Figs. 7 and 8, two cylindrical lower cases (
The side surface of the bracket θ2) formed around the bearing part 06) is formed as a bearing part.
) are formed opposite to the bearing part (1) of the bracket (2) which is in contact with the bracket (1). In this example, after inserting the bottle (11) into the packet arm (3), the collar-shaped boss 64) is inserted to support the packet arm (3).
(This is an example in which the wire is inserted and attached to the bearing part (16) (1) by welding or other known means.

b. Embodiment 2 In Embodiment 2 shown in FIG. 9, a bracket (12) is formed from each vertex of the polygonal cylindrical lower case (2) corresponding to the number of packet arms (5), and the bracket (12) is 12
) with a hole drilled in it, in this case.

The upper part of the packet arm (6) is formed with a groove having a concave cross section, and is rotatably attached to the bracket (12) so as to sandwich the bracket (62) through the bottle (11)e.

Note that the bracket 02) may be formed not at the apex of the lower case (9) but at each side.

0. Example 6 In Example 3, as shown in FIGS. 10 and 11, the bearing portions are formed at the upper and lower portions of the bracket (1), and the upper bearing portion (5) Drill a through hole (+7) whose axis is aligned with (+6) [7 to tomorrow.

Crest hole θ7), opposing hole (1ch and packet arm (6)
) Connect the bottle (11) to the hole at the top of the oak l-421
), and the lower bearing parts (16) and (1) formed below the bracket also have the same structure.

d, Example 4 In Example 4, as shown in FIGS. 12 and 13, the bearing part (16
)・(In Example 4, one side of the hole drilled in white is left open), and after inserting the bottle 01) into the hole at the top of the packet arm (3), insert the bearing part 06)・(1 bottle). This is an example in which both ends of (11) are fitted and then the bearing cover Q is attached to the open portion by welding or other known means.

In this example, the holes in the bearing portions 63) and (1'g) are formed with an opening in cross section (Fig. 13).The opening direction is 0.

Any direction may be used as long as it is the most effective direction.Operations and Effects of the Present Invention] Visually, the movement of the lower box of the present invention is approximately the same as that of a conventional lower box, or the structure of the lower box is different. Because the number of brackets is different, that is, the number of brackets is 3.
Since the number is the same as that of the conventional polytube type packet (inferior to the conventional one), it has a remarkable effect different from that of the conventional polytube type packet.

(a) By pivoting the packet arm with the conventional number of brackets (Figures 7.9 to 12.14).

Since the distance between adjacent fluxes (12) and (12) is widened, there is no disadvantage of the bottle (11) coming into contact with the adjacent bracket when inserting the bottle (11), as in the conventional case (6th and 9th).・Since the 10th case is on the same scale, it is obvious to the naked eye, and the above drawbacks have been solved in other cases as well.)

The outer shape of the lower case (9) can be significantly reduced compared to the conventional case, and therefore, it is easy to assemble, lightweight, and the manufacturing cost is low.

)) Since the distance between adjacent brackets becomes wider, the bin (11)! It is also possible to increase the length of the hole in the upper part of the packet arm (6) and the part that pivotally supports both ends of the bottle (11). Lower case (9)
Since the can be reduced, it is also possible to increase the outer diameter of the bottle (11), and it also has the effect of further increasing the strength and durability against surface pressure, abrasion, etc. than in the past.

(c) Since the width of the upper part of the packet arm (3) in (b)) can be made wider, it is possible to increase the width of the packet arm (3) upward from the width of the central part, as in the conventional packet arm (5) in Fig. 5. Since the difficult process of gradually narrowing down to the width S of the earth part is eliminated, the manufacturing cost is reduced, and the strength against twisting of the packet arm (6) is improved.

In addition, since the outer shape of the lower case (9) can be reduced compared to the conventional case, as shown in Fig. 6,
Rotating fulcrum A at the top of packet arm (3) is the center line Y-Y
Since it can be brought closer to the target direction, AB can be made larger than the penalty, and the gripping force naturally increases due to the "leverage effect", resulting in a significant improvement in performance.

(e) Since the durability of (b) is improved, the bottle (1
Since the frequency of replacing the bottle (1) will be very low, the bottle (11
) to form the bracket (12) and boss (14), etc. in one piece by a simple and strong means of welding, by eliminating the complicated mounting structure such as bolt tightening that takes into account the removal of the bracket due to wear. This will result in an even more solid structure that will allow for greater stability.

Conventionally, the bottle (11)'& was replaced every year, which is almost the same as the lifespan of the knockette itself.

Figures 14 and 15 show a roughly H-shaped bottle (11) welded to the plug, throat (12) and (1 wire), and the packet arm (5)
This is another example where the upper part is split.

(f) The above are the effects of the present invention that are common to Examples 1 to 4. In Example 3, the packet arms (5) are Since the shapes are different, when the packet arm (6) is opened, the opening angle of the tip of the packet arm (6) varies, and as a result, when the packet arm is closed, stones that come loose from the preceding packet arm may be removed.・Utility model registration application (Sho 55-066025) that scraps, etc. will not be scooped up by the following packet arm, and there will be no leakage.
It will also have the effect of

Further, in the embodiment (FIGS. 10 and 11), there is an advantage that the hole can be drilled through the opposing bearing portions in one step. Furthermore, in the fourth embodiment, a groove with a rectangular cross section as a rotation stopper, which has not conventionally been found in this type of packet, can be easily bored to provide a strong rotation stopper. Embodiment 4 also has the advantage that since one side of the hole in the bearing part is open, the bottle (11) can be easily attached and removed.

The above are the effects of the present invention. Regarding the elevating device (8), examples are given of one using a movable pulley effect (Fig. 1) and one using a fluid pressure cylinder (Fig. 2). In any case.

Around the upper box (1) and lower box (2),
Once the structure and dimensions of the upper part of the lot (4) and the upper part of the packet arm (5) are determined, the mounting position of the lifting device (8) and the length of the loft are determined.
The mounting position of the lower part of the elevator k (8) does not affect the effect of the lower box of the present invention in any way.

For the sake of explanation, only the cylindrical shape of the lower case (9) is shown, but whether it is annular or cylindrical depends on the weight of the kerato, the necessity of the self-weight effect, and the elevating device. This is determined by various conditions such as the type and does not affect the effects of the present invention in any way.

9 Regarding the present invention, there is no mention of the upper box, and depending on the work conditions such as the specific gravity of the object being light or the excavation resistance being low, a lightweight type /kukerato may be suitable. It is obvious from the description of the present invention that part of the technical idea of Bokusu can be adopted.

[Brief explanation of the drawing]

Fig. 1 is a partially omitted front view of a polytube type packet using a movable pulley effect, Fig. 2 is a partially omitted front view of a polytube type packet using a fluid pressure cylinder, and Fig. 6 is a partially omitted front view of a polytube type packet using a hydraulic cylinder.
FIG. 4 is a front view showing the open state of the polytube type packet, FIG. 4 is a partial cross-sectional side view of the conventional lower box, and FIG.
FIG. 6 is a front view of a conventional packet arm, and FIG. 6 is a partially sectional plan view of a conventional lower box. 7 to 15 are views relating to the lower box of the present invention, in which FIG. 7 is a partially sectional plan view of Embodiment 1, FIG. 8 is a sectional view of E, and FIG. FIG. 10 is a partially sectional plan view of Example 2, FIG. 11 is a perspective view of Example 5, and FIG. 12 is a partially sectional plan view of Example 4. 14 is a partially sectional plan view showing another example of the embodiment, and FIG. 15 is a sectional view G. The symbol a in the figure is 1 for the upper box, 2 for the lower box,
3 is packet arm, 4 is rondo, 7 is cylinder, 8
1 is a lifting device, 9 is a lower case, 10 and 10' are conventional brackets, 11 is a bottle, 12 and 12' are brackets of the present invention, 13 and 15' are bearings, and 14 is a boss. 15. What is the upper bearing part? 16. 16゛ is the lower bearing part. 17.
17' is a through hole, 20 is a bearing cover, and A-0 is a fulcrum that shows the action of the packet arm in FIG. 6, respectively. 70th ＼ 90th

Claims (1)

[Claims] 1. Below the upper box (1), a lower box (2)
is placed around the lower box (2) so that it can be raised and lowered freely. Arc-shaped packet arm (5) whose central part curves outward
The upper part of the packet arm (6) is pivotally supported around the lower box (2), and the rod (4) is entirely disposed between the upper box (1) and the packet arm (3). Place the upper part of the rod (4) into the upper box (1), and insert the rod (4) into the upper box (1).
4) in a polytube type packet in which the lower part of the packet arm (3) is pivotally supported, the packet arm (3)
A lower box of a polytube type packet, characterized in that a bracket is formed around the lower box so as to pivotally support the upper part of the packet arm (3) with the same number of brackets as the number of brackets. 2. The lower part of the polytube type packet according to claim 1, wherein a bearing part is formed on a bracket formed around the lower box, and the bearing part faces a bearing part formed on an adjacent bracket. box. 3. The lower box of the polytube type packet according to claim 2, wherein opposing bearing portions are alternately formed at the upper and lower sides of the side surfaces of each bracket. 4. Drill a hole whose axes align with each other in the opposing bearing parts,
The lower box 0 of the polytube type packet according to claim 2, wherein the hole has a shape with the side open, and a bearing cover is attached to the open part.