JPS5817025Y2 - gripping device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a gripping device that clamps objects to be transported such as slabs or steel ingots, and is designed to facilitate manufacturing and assembly and improve safety. Regarding.

Generally, this type of gripping device is attached to an overhead crane or the like as a transporting means, and is used to transport relatively large objects such as slabs or steel ingots within steel manufacturing facilities.

By the way, the conventional gripping device has a simple structure in which the tong members are arranged facing each other and can be opened and closed in order to sandwich the object from both sides, so it cannot support the load of the object. However, there is a problem in that there is a risk that the tongs may fall when pulled out from between the tong members.

Therefore, in order to solve this problem, a hole is formed in the tong member that penetrates in the clamping direction, and a tong punch is inserted into the hole so that the tong punch can be freely swung vertically so that one end on the clamping part side faces diagonally upward. The tong punch section of the device is configured such that when the object to be transported is held and lifted, the tip of the tong punch rotates due to the load and bites into the object to securely grip the object. Since it is a consumable item, it has to be installed and removed many times, so a gripping device that is easy to replace has been proposed.

However, in this gripping device, as a means for swingably supporting the tong punch, a through hole is formed in the tong member and the tong punch to communicate these, and the tong punch is inserted through a support pin inserted into the through hole. Since it adopts a structure that supports , it has the following problems.

That is, (1) it is not easy to align the axes when inserting the support pin into the through hole, and assembly takes time and effort.

■Since the support pin is easy to pull out from the through hole due to the through-bearing structure, there is a risk that the tong punch may come off from the tong member, resulting in low safety and reliability.

- In particular, preventive means such as lock pins to prevent the support pins from falling out are essential, which increases the number of parts and makes maintenance difficult.

The present invention has been devised to solve the various problems mentioned above all at once.

The purpose of this invention is to make it extremely easy to align the axis when supporting the tong punch on the tong member, to prevent the support pin from coming off like in conventional devices, to support the tong punch in an easy-to-understand manner, and to improve safety and reliability. It is an object of the present invention to provide a gripping device which is improved in performance, has a simple structure, and can be easily manufactured, installed and assembled, and has good maintainability.

Preferred and practical examples of the present invention will be described in detail below with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a gripping device that is attached to an overhead crane or the like and operated to move up and down and traverse, and is equipped with a support tube 2 that is supported by the overhead crane or the like and hangs down.

A bracket 3 is provided at the lower end of the support tube 2, and the bracket 3 has a pair of tong members 4, 4 extending vertically downward for holding an object P such as a slab or a steel ingot. They are installed facing each other so that they can be opened and closed.

Specifically, the tongue members 4, 4 have their base ends 4a, 4a
is rotatably supported by the bracket 3 via pins 5, 5, so that it can be opened and closed.

A lower end 6a of an operating rod 6, which is movably inserted into the support tube 2 along the support tube 2, is connected to the base end portions 4a, 4a of the tong members 4, 4. By doing so, each piece of tongs 4°4 can be opened and closed.

The free ends 4b, 4b of the tong members 4, 4 in the gripping device 1 configured in this manner are provided with a tong punch 7. which bites into the object P to securely hold it when lifting the object P. 7 is provided.

The tongs punch 7 is formed into a rectangular rod shape, and a conical punch portion 8 for pressing the transported object P is integrally formed at the tip portion via a collar portion 9, as shown in FIG. There is.

Further, as shown in FIG. 4, pin portions 10, 10 extending relatively in the horizontal direction are integrally formed at substantially the center in the axial direction and the center in the thickness direction of both side surfaces 7a, 7a of the tong punch 7. The tong punch 7 is supported by the tong member 4 so as to be swingable in the vertical direction via the pin portions 10, 10.

In particular, as will be described later, the flange 9 is slidably engaged with both side edges 13 and 13 of the holding part side opening (referred to as the inner opening) 12 of the hole 11 formed in the tong member 4. Both sliding surfaces 9a, 9a of the flange 9
is formed into a curved surface having a radius R with the pin portions 10, 10 as the center point.

Furthermore, a weight 14 is removably provided at the other end of the tong punch 7 for biasing the punch part 8 upward using the pin parts 10, 10 as fulcrums. A male threaded portion 15 extending in the axial direction is formed in the portion, and a weight 14 is detachably screwed onto this male threaded portion 15.

In particular, this weight 14 is set to be larger than the inner diameter (inner diameter in the horizontal direction in the illustrated example) of an opening (referred to as an outer opening) 16 of the hole 11 formed in the tong member 4 on the side opposite to the holding part side. It is configured to prevent the tongue punch 7 from slipping out of the hole 11 by being locked to the end edge 17 of the opening 16.

The tong punch 7 configured in this way is swingably mounted in the hole 11 formed in the tong member 4.

That is, the hole 11 is formed at the free end 4b of the tong member 4 so as to pass through the free end 4b in the clamping direction or rotational direction, and its cross section is designed to allow the tong punch 7 to be freely inserted and removed, and to restrict its rolling. It is formed into a rectangular shape (see Fig. 4).

Further, as shown in FIG. 3, the hole 11 is formed in a stepped shape so as to be bent at approximately the center in the axial direction, and the inner opening 12 is shifted upward from the outer opening 16, so that the inner opening 12 side The lower step portion 18 and the upper step portion 19 on the outside opening 16 side are used as locking portions 20a and 20b for locking or stopping the tong punch 7 in a horizontal state.

Furthermore, in the hole 11, both end edges 13, 13 of the inner opening 12 have the same curvature as the sliding surfaces 9a, 9a on both sides of the collar 9 of the tong punch 7, as shown in FIGS. The receiving portions 21, 21 are formed in a bulging manner.

On the other hand, in the vertically opposing walls 11a, 11a in the hole 11, guide grooves 22, 22 for guiding the pin parts 10, 10 of the tongs punch 7 to approximately the center in the axial direction of the hole 11 are formed from the inner opening 12 side to the outer opening. It is formed to be inclined downward toward the portion 16 side.

This guide groove 22° 22 opens on the inner opening 12 side and forms an entrance 22a.

22a, the hole 11 is closed at approximately the center in the axial direction, and the closed portions 22b, 22b are formed as bearing portions 23, 23 for bearing the pin portion 10.10.

In particular, the length between this bearing portion 23 and the receiving portion 21 of the edge portion 13 of the inner opening 12 is equal to the length between the pin portion 10 of the tong punch 7 and the sliding surface portion 9a of the collar portion 9. The tong punch 7 is set in the hole 11 of the tong member 4.
is configured to be able to swing vertically about the pin portion 10.10 while sliding both sliding surfaces 9a, 9a of the collar portion 9 on the receiving portion 21.21.

Therefore, when the tong punch 7, which is pivotally supported by the bearing parts 23, 23 of the guide grooves 22, 22 via the pin parts 10, 10, pushes the punch part 8 downward, the rear lower surface part is pushed by the urging force of the weight 14. 7b is locked to the lower edge 17 of the outer opening 16 and the punch part 8 is faced diagonally upward from the inclined standby state shown by the imaginary line in FIG. The second part is rotated so that the front lower surface part 7b hits the lower locking part 20a in the hole 11 and the rear upper surface part 7c hits the upper locking part 20b, so that the punch part 8 faces in the horizontal direction. It will be displaced to the horizontal operating state shown by the solid line in the figure.

In this case, when the tip of the punch portion 8 is displaced by a distance in the vertical direction, it is also displaced by a distance l in the horizontal direction, and this horizontal displacement is used to move the transported object P. It is configured to press.

When assembling the gripping device configured as described above, first insert the tong punch 7 from which the weight 14 has been removed into the hole 11 through the inner opening 12 of the punch member 4 with the rear side opposite to the punch part 8 first. With the pin portions 10, 10 engaged with and aligned with the guide grooves 22.22, both sliding surfaces 9a, 9a of the collar portion 9 slide against the both side receiving portions 21. of the inner opening 12. Insert until it matches 21.

Next, the weight 14 is screwed onto the external threaded portion 15 of the tong punch 7 extending outward from the outer opening 16 of the tong member 4, thereby completing the assembly.

In this way, assembly can be accomplished easily and quickly.

Moreover, the guide groove 22.22 in which the pin portion 10.10 is inclined
Coupled with being supported by the lower end bearing parts 23, 23,
Since the flange 9 locks on both side edges 13, 13 of the inner opening 12, and the weight 14 locks on the edge 17 of the outer opening 16, the tong punch 7 can be securely inserted into the hole 11 of the tong member 4. can be supported.

In particular, the pin portions 10 and 1, which are the center of swing of the tong punch 7,
0 is guided by the guide grooves 22, 22 formed in the hole 11 and positioned in the predetermined bearing portions 23, 23, so alignment is extremely easy, and unlike conventional devices with a through bearing structure, both ends are Since it has a closed bearing structure, there is no chance of the support pin coming off like in the conventional case, making it safe.

Next, the operation of the above embodiment will be described.

First, the tong punch uses the pin parts 10, 10 as fulcrums by the biasing force of the weight 14 to open the tong members 4°4 in a standby state with the punch part 8 facing diagonally upward and position them on both sides of the object to be transported P. The tong member 4 via the operating rod 6,
4 is closed, and the initial pinching is performed by bringing the punch parts 8, 8 into contact with the transported object P as shown in FIG.

Next, when the tong members 4, 4 are raised, the tong punch 7 is moved from the state shown by the imaginary line in FIG.
10 as the center of swing to lower the punch portion 8, and the front lower surface portion 7b hits the lower locking portion 20a in the hole 11, and the rear upper surface portion 7c hits the upper locking portion 20b. At the same time, it stops in a horizontal position as shown by the solid line in FIG.

At this time, the punch part 8 of the tong punch 7 is connected to the pin part 10.1.
By rotating around 0 as the center axis, the tong member 4 protrudes by a distance l in the horizontal direction, and bites into the transported object P by this protrusion amount l, automatically increasing the gripping force.
, 4, the grasping state is reliable and complete.

In this case, the repulsive force generated in the tongs punch 7 in the direction from the punch part 8 side to the weight 14 side is applied to the punch member 4 via the sliding contact surfaces 9a, 9a of the collar part 9 that slides along the receiving parts 21, 21. Since it does not touch the pin portion 10.10, which is the center of the swing, its durability can be improved as much as possible.

On the other hand, when transporting the transported object P to the desired location and separating it, the tong members 4, 4
Then, the force that urges the punch part 8 downward is released, and the tong punch 7 swings around the pin part 10, 10 by the urging force of the weight 14, and automatically returns to its original position. Returns to standby state.

Therefore, since the punch portion 8 does not get in the way, the transported object P can be smoothly separated or released, and the next grasping operation can be performed quickly and easily.

In the above embodiment, the pin parts 10, 10 are integrally formed with the tongs punch 7, but a pin member may be passed through the tongs punch 7, and the protruding ends on both sides thereof may be formed as the pin parts 10, 10.

Also in this case, the pin member will not come off at all because it engages with the guide grooves 22, 22.

Further, in the above embodiment, the tong punch 7 is replaced by the tong member 4,
Although the tong punch 7 is provided on both of the tong members 4, the effect can be exerted even if the tong punch 7 is provided on only one of the tong members 4.

In summary, according to the present invention, the following excellent effects can be obtained.

(1) Since the pin part, which is the center of swing of the tong punch, is installed in the hole of the tong member through the guide groove, it is extremely easy to align the axis when supporting the tong member on the tong member, and the tong punch can be held securely. can be supported.

(2) Since the movement of the pin portion in the axial direction is restricted by the guide groove, there is no possibility that the support pin will come off as in conventional devices, and therefore safety and reliability can be improved.

(3) Since the structure is simple and the number of parts is small, it can be easily manufactured and assembled, has good maintainability, and can be manufactured at low cost.

[BRIEF DESCRIPTION OF THE DRAWINGS] The drawings show one embodiment of the present invention, in which Fig. 1 is a front view of the gripping device, Fig. 2 is an enlarged sectional view of section A in Fig. 1, and Fig. 3 is an enlarged sectional view of section A in Fig. 2 is a cross-sectional view showing the hole with the tongue punch removed, FIG. 4 is a cross-sectional view taken along the line IV--IV in FIG. 2, and FIG. 5 is a side view taken along the line ■--v in FIG. In the figure, P is an object to be transported, 4 is a tong member, 7 is a tong punch, 8 is a punch portion, 10 is a pin portion, 11 is a hole, 22 is a guide groove, 22b is a terminal portion, and 14 is a weight.

Claims (1)

[Scope of utility model registration request] A gripping device having tong members facing each other for gripping an object that can be opened and closed, the gripping device having a hole formed through at least one of the tong members in the gripping direction, and a gripping device in an opposing wall in the hole. a guide groove formed to slope downward from the part to the opposite side and whose terminal end is closed; and a guide groove that is removably inserted into the hole from the holding part side along the guide groove and is journalled in the closed part of the guide groove. A tongs punch has a pin member and is swingably supported in the hole with the pin member as a central axis; a punch part formed at the tip of the tongs punch to press the object to be transported; and a tongs punch at the other end of the tongs punch. A gripping device characterized by comprising a weight that is detachably provided and that locks the weight to a tong member and urges a punch portion upward.