JPH04191291A - Sling conveying holder - Google Patents

Abstract

PURPOSE:To open or close a holder with only rotation and vertical motion of a floating cam by lowering a device on a hanging load, pushing a contact plate upward, thereby having the floating cam rotated and lowered by a selector means, and making linkage so as to grasp the hanging load in operation. CONSTITUTION:When a holder 1 is shifted and situated on a hanging load 100 and then lowered, a hanging load top face 101 pushes up a contact plate 8 and a floating cam 70 goes up together with a piston member 7. During this upward motion, a cam operating surface 70a comes into contract with a side lower surface of a change-direction hook 63, but since this hook 63 is regulated of its rotation by a stopper 8, the cam 70 rotates around a shaft 71, and the one end is projected upward from a through hole 62 of a cam guidance plate 61. Next, when the holder 1 is pulled up with a sling wire, a casing 6 alone goes up, the cam 70 is inserted into space between guide plates 65, and rotation is regulated, thus it goes down. If so, both upper and lower links 23, 25 are also rotated, thereby pinching the hanging load 100 in between as access of a pair of holding arm 5. When the holder 1 is lifted up, these arms 5 are slung up in a state of holding the hanging load 100 in between.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a lifting and transporting gripping device that is attached to a lifting wire of a crane and grips, lifts, and releases heavy objects such as concrete blocks. It is.

[Prior Art] Conventionally, as a device for lifting and transporting concrete blocks and the like, the device described in Japanese Patent Publication No. 49-31055, for example, is known. This is equipped with a pantograph-shaped link and an opening/closing control device for this link, a lifting wire is connected to the upper end of the mouth link, a grip is formed at the lower end of this link, and a casing is used as the opening/closing auxiliary device. The link is provided with a heart-shaped guide groove and a locking pin that moves within the guide groove, and the link is opened and closed by moving the locking pin along the guide groove.

Further, Japanese Utility Model Application Publication No. 59-97985 is equipped with an opening/closing control device similar to the above, and a pair of load gripping arms are provided at the lower ends of a pair of link mechanisms, thereby gripping a long object. That's what I do.

[Problem to be solved by the invention]

In any of the above devices, a member with a heart-shaped guide groove is required, and in order to operate accurately, the shape of this guide groove must be formed accurately. The drawback is that it is very time-consuming and the operation is not reliable.

The present invention has been made to solve such conventional problems, and an object of the present invention is to provide a lifting and transporting gripping device that has a relatively simple configuration, can be easily manufactured, and can operate reliably. The purpose is to

[Means to solve the problem]

This invention includes an upper frame and a lower frame, a link mechanism that connects them so that their spacing can be changed while keeping them parallel to each other, a casing attached to the upper frame, and a piston attached to the lower frame. a pair of mutually parallel gripping arms attached to a lower end of the linkage;
a contact plate attached to the lower end of the piston member; the piston member is movably inserted into the casing to constitute a switching means within the casing; A floating cam that is rotatable around a horizontal axis is provided on the part, a guide part that restricts the rotation of this floating cam and only allows vertical movement, and the floating cam is rotated on the upper or lower side of this guide part. and a support section that prevents the piston member from rising or falling by supporting the floating cam above or below the guide section.

The link mechanism may be arranged in pairs on the left and right, and the casing, the piston member, and the contact plate may be arranged between them. The operating mechanism of the switching means includes a cam guiding plate that rotates the floating cam when the floating cam is pressed, and a cam guiding plate that is arranged below the cam guiding plate to rotate the floating cam only when the floating cam is raised. It may also be configured to include a direction changing hook for rotation.

[Effect]

In the above configuration, by lowering the device to the suspended load and pushing the contact plate upward, the switching means rotates the floating cam and lowers it, which activates the link mechanism to grip the suspended load, and When the load is lowered and the equipment is lowered to the ground, the contact plate is pushed upward,
The floating cam is rotated by the switching means to automatically release the suspended load.

〔Example〕

In Figures 1 and 2, the lifting and transporting gripping device f
1 is an upper frame (upper connecting beam) 3, a lower frame (lower connecting beam) 4, a link mechanism 2 that connects these so that the distance between them can be changed while keeping them parallel to each other, and the upper frame 3. A casing 6 attached to the center part in the width direction,
A piston member 7 attached to the center in the width direction of the lower frame 4, a pair of mutually parallel gripping arms 5 attached to the lower end of the link machine 1112, and a lower end of the screws 1 to It basically consists of an attached contact plate 8. At both ends of the upper frame 3, the upper frame 3 can be lifted up by a lifting wire 11 via lifting hooks 12 which are attached facing each other.

As shown in FIGS. 3 and 4, the link mechanism 2 includes a fixed link 21 horizontally attached to both ends of the upper frame 3, and a connecting pin 22 at both ends of the fixed link 21 to enable rotation. It has an attached upper movable link 23 and an L-shaped lower movable link 25 rotatably attached to the lower end of this upper movable link 23 via a connecting pin 24, and these lower movable links 25 cross each other. It is arranged as follows. Further, a fixed link 27 is attached horizontally to both ends of the lower frame 4, and the intermediate portion of the lower movable link 25 is rotatably connected to both ends of the fixed link 27 via a connecting pin 26. .

Furthermore, gripping arms 5 are attached to the lower ends of the lower movable links 25, and the gripping arms 5 are parallel to each other and face each other.

As shown in FIGS. 5 to 7, the piston member 7 is
It is inserted into the casing 6 so as to be movable in the vertical direction, and a switching means is configured within the casing 6. This switching means includes a floating cam 70 attached to the upper end of the piston member 7 and an operating mechanism for rotating the floating cam 70.

That is, a pair of floating cam support plates 72 are provided at the upper end of the piston member 7, and a floating cam 70 held between the support plates 72 so as to be rotatable about a shaft 71 is provided. As shown in FIG. 5, the floating cam 70 is shaped like a parallelogram with one opposing side having an operating surface 70a formed in a convex arc shape.

Further, a guide plate (guide portion) 65 is formed in the casing 6, and an inclined surface (support surface) 6 is formed on the upper part of this guide portion 65.
6 is formed. A space 69 in which the floating cam 70 can rotate is formed in the upper part of the support surface 66, and a cam guiding plate 61 is provided above the space 69, and a through hole through which the floating cam 70 passes is provided in a part of the cam guiding plate 61. 62 is formed.

A direction changing hook 63 rotatably supported around a shaft 64 is provided on one side of the lower side of the direction changing hook 63, and when one side of the lower surface of the direction changing hook 63 comes into contact with a stopper 68, the direction changing hook 63 can be rotated in one direction. Rotation (clockwise in Figure 6) is prevented.

As shown in FIG. 8, a bottom plate 42 is provided at the lower end of the piston member 7, and this bottom plate 42 is stacked on a connecting plate 41 connecting the lower surfaces of the lower frame 4 and connected with bolts 43. By doing so, the piston member 7 is attached to the lower frame 4. A pair of bolts 80 are attached to the connecting plate 41 so as to protrude downward, and the contact plate 8 is attached horizontally to the lower end of the bolts 80.

In the above configuration, in an unloaded state, the gripping arm 5 is in an open state as shown in FIG. 4, the piston 7 is deeply inserted into the casing 6 as shown in FIG. 9, and the floating cam 70 is in a horizontal position. and is supported on a support surface 66.

When the gripping device 1 is moved from this state to a predetermined position and placed on the suspended load 100, and the gripping device 1 is lowered from the state shown in FIG. 4, the upper surface 101 of the suspended load 100 pushes the contact plate 8 upward. The floating cam 70 is raised together with the piston member 7. During this upward movement, the operating surface 70a of the idler cam 70
comes into contact with the lower surface of one side of the direction changing hook 63, and since the direction changing hook 63 is prevented from rotating by the stopper 68, the floating cam 70 rotates clockwise in FIG. 9 around the shaft 71. As shown by the imaginary line, one end thereof projects upward from the through hole 62 of the cam guide plate 61 .

When the gripping device 1 is pulled up from this state by the lifting wire 11, only the casing 6 rises (the piston member 7 descends relative to the casing 6), and the floating cam 7o is guided as shown by the solid line in FIG. It is inserted between the plates 65, and its rotation is regulated by the guide plate 65 and it descends. Due to this lowering, the upper movable link 23 and the lower movable link 25 also rotate around the bins 22 and 24, respectively, as shown in FIG. 3, and the pair of gripping arms 5 approach each other to grip the neck of the suspended load 100. Then, when the gripping device 1 is raised in this state, the gripping arm 5 lifts the suspended load 100 while holding it between them, so that the suspended load 100 can be transported to a predetermined location.

When the suspended load 100 is transported to a predetermined location and lowered, the lower surface of the suspended load 100 is brought into contact with the ground, and the gripping device 1 is roughly lowered, the suspended load 1
The upper surface 101 of 00 presses the contact plate 8 upward, and the upper movable link 23 and the lower movable link 25 are rotated around the pins 22 and 24, respectively, and the pair of grips changes from the state shown in FIG. 3 to the state shown in FIG. 4. The arms 5 are separated from each other, and the neck of the suspended load 1°O is released from being held. In other words, when the contact plate 8 is pushed upward, the piston member 7
The floating cam 70 rises from the state shown in FIG. 5, and its operating surface 70a comes into contact with the lower surface of the cam guiding plate 61, rotating clockwise in FIG. 5 from the state shown by the imaginary line 70c and turning sideways. .

Note that when the floating cam 70 rotates, the floating cam 70
The right side in FIG. 5 contacts one side of the direction changing hook 63 from above, but the direction changing hook 63
4 rotations (counterclockwise in Fig. 6) 1-movement cam 7o
Do not interfere with the above rotation.

When the gripping device 1 is pulled up from the above state, only the casing 6 rises, and the floating cam 70 is supported on the support surface 66 as shown by the solid line in FIG. It is maintained in the open state shown in the figure. Thereafter, by similar operations, the suspended load of 1°O is grabbed, lifted, placed on the ground, and released from the grip.

In this manner, the above configuration includes the floating cam 70 at the upper end of the piston member 7, a guide portion for vertically guiding the floating cam 70 in the casing 6, and a switching means for rotating the floating cam to perform a switching operation. , the gripping device is opened and closed simply by the rotation and vertical movement of the floating cam. Therefore, compared to the conventional system in which the locking pin moves through a kite groove with a complicated shape, highly accurate machining is not required, operation is reliable, and the device can be manufactured at a low cost. .

In the above embodiment, the operating mechanism is provided above the guide part, but the operating mechanism may be installed below the guide part to perform the same operation.

〔Effect of the invention〕

As explained above, in this invention, by lowering the device to a lifting position and pushing the contact plate upward, the floating cam is rotated and lowered by the switching means, and thereby the link mechanism is actuated to grasp the suspended load. When the suspended load is lowered and grounded, and the device is further lowered, the contact plate is pushed upward, and the floating cam is rotated by the switching means to automatically release the suspended load. It is composed of For this reason, the gripping device is opened and closed only by the rotation and vertical movement of the idler cam, which eliminates the need for highly precise machining and ensures reliable operation.
The device can be manufactured at low cost.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a side explanatory view of the link mechanism in a state where a suspended load is lifted, and Fig. 4 is a state in which the suspended load is released. Fig. 5 is a longitudinal sectional view of the switching means, Fig. 6 is a side explanatory view of the link mechanism.
The figure is a sectional view taken along the line Vl-VI in Fig. 5, and Fig. 7 is a cross-sectional view taken along the line Vl-VI in Fig. 5.
-■ Line sectional view, Figure 8 is a front view of the contact plate mounting section, Figure 9 is
The figure is a view corresponding to FIG. 5 in which the suspended load is released from grip. DESCRIPTION OF SYMBOLS 1... Gripping device, 2... Link mechanism, 3... Upper frame, 4... Lower frame, 5... Gripping arm, 6... Casing, 7... Piston member, 8...・・Contact plate, 6
1... Cam guiding plate, 63... Direction changing hook, 65
...Guide plate (force ID part), 68...Stopper, 7
0...Idle cam. Patent applicant Horie Kogyo Co., Ltd. Representative Patent attorney Etsushi Kotani
Patent Attorney Chief 1) Masamukai Patent Attorney Takao Ito Figure 5 Figure 6
Figure 3 Figure 4 Figure 7 Figure 8 Figure 9

Claims (1)

[Scope of Claims] 1. An upper frame, a lower frame, and a link mechanism that connects these so that the distance between them can be changed while keeping them parallel to each other;
a casing attached to the upper frame, a piston member attached to the lower frame, a pair of mutually parallel gripping arms attached to the lower end of the link mechanism, and a contact attached to the lower end of the piston member. The piston member is movably inserted into the casing to constitute a switching means within the casing, and the switching means is provided at an upper end of the piston member so as to be rotatable about a horizontal axis. an idler cam, a guide section that restricts the rotation of the idler cam and allows only vertical movement, an operating mechanism that rotates the idler cam above or below the guide section, and an operating mechanism that rotates the idler cam above or below the guide section; 1. A lifting and transporting gripping device comprising: a support portion that prevents the piston member from rising or falling by supporting a floating cam on the lower side. 2. An upper frame and a lower frame, and a link mechanism that connects the upper frame and the lower frame so that the distance between them can be changed while keeping them parallel to each other;
a casing attached to the upper frame, a piston member attached to the lower frame, a pair of mutually parallel gripping arms attached to the lower end of the link mechanism, and a contact attached to the lower end of the piston member. The piston member is movably inserted into the casing to constitute a switching means within the casing, and the switching means is provided at an upper end of the piston member so as to be rotatable about a horizontal axis. an idler cam, a guide section that restricts the rotation of the idler cam and allows only vertical movement, an operating mechanism that rotates the idler cam above the guide section, and an operating mechanism that rotates the idler cam above the guide section. 1. A lifting and transporting gripping device comprising: a support portion that prevents the piston member from descending by supporting the piston member. 3. The lifting and transporting gripping device according to claim 1 or 2, wherein the link mechanisms are arranged as a pair on the left and right, and the casing, the piston member, and the contact plate are arranged between them. 4. The operating mechanism of the switching means includes a cam guiding plate that rotates the floating cam when the floating cam is crimped, and a cam guiding plate that rotates the floating cam only when the floating cam is moved up by being placed under the cam guiding plate. 4. The lifting and transporting gripping device according to claim 1, further comprising a direction changing hook for rotating the device.