JP3219038U - Hanging clamp device - Google Patents

Abstract

A suspension clamp device that can easily lock and unlock the device in its open state by using the weight of the device and can efficiently lift and suspend a workpiece. A pair of clamp arms (101, 102) that intersect with each other, bend downwardly in a U-shape, have locking claws (103, 104) at the lower end, and can rotate around a rotation pin (107), A pair of link arms 110 and 111 rotatably connected to the upper ends via link pins 108 and 109, a hook 113 attached to the tip of the link arm via a support pin 112, and an opening of the clamp arm A lock mechanism 120 that holds the state is provided. The lock mechanism includes a lock member 121 that is pivotably suspended via a pivot pin 122 near the link pin of the link arm, and an engagement claw provided at the tip, and a rotation-regulated state near the bent portion of the clamp arm. It is comprised from the cam member 123 which provided the engagement recessed part engaged with the engagement nail | claw of a lock member with the fall of the link arm by weight. [Selection] Figure 1

Description

  The present invention relates to a suspension clamp device for grasping a workpiece such as a stone material, a concrete product, or a log product, and lifting and hanging the workpiece.

  2. Description of the Related Art Conventionally, a clamp device that is used to grab a stone or concrete product and lift it by a crane device is known. By using the clamping device, it is possible to safely lift heavy materials such as stones and concrete products with a crane device, and to lower and install them at a destination.

  Conventionally, as the clamp device, for example, a device (Patent Document 1) that can grip a U-shaped groove made of concrete from the left and right by a movable leg and adjust the width of the movable leg by operating a handle, There is known an apparatus (Patent Document 2) in which a stone is held by a holding metal fitting at the tip of an arm intersecting, and the position of the holding metal metal can be adjusted by a slide bar.

JP 61-90990 A JP 2006-290612 A

  However, the clamp device of Patent Document 1 needs to use a handle when the U-shaped groove is clamped and released, and the clamp device of Patent Document 2 locks the intersecting arms in a standby state. The reverse U-shaped lock fitting attached to one arm is manually hooked to the end of the other arm, and it is necessary to manually hook the lock fitting every time the stone is lowered. The working efficiency of lifting and hanging is poor.

  The present invention has been made in view of the above problems, and a suspension clamp device that can easily lock and unlock the device using its own weight, and can efficiently lift and suspend the workpiece. The purpose is to provide.

In order to solve the above problems, a hanging clamp device according to the present invention is:
A pair of clamp arms that can be turned around the rotation pin and can be rotated via a link pin. A suspension clamp device comprising a pair of linked arms, a hook attached to the tip of the link arm via a support pin, and a lock mechanism for holding the clamp arm open,
The lock mechanism is suspended in the vicinity of the link pin of the link arm via a rotation pin and is provided with an engaging claw at the tip, and is supported in a rotation-restricted state near the bent portion of the clamp arm. The main feature is that it is composed of a cam member provided with an engaging recess that engages with an engaging claw of the lock member as the link arm descends.

  The suspension clamp device according to the present invention is a rotation regulating pin that regulates the rotation of the cam member when guiding the engaging claw of the lock member to the engaging recess while lowering the link arm by its own weight in the vicinity of the cam member. It is a second feature that is provided.

  The suspension clamp device according to the present invention abuts the engagement claw of the lock member near the engagement recess on the upper surface of the cam member in a state where the rotation of the cam member is restricted as the link arm descends due to its own weight. A third feature is that an upper guide portion that guides toward the engaging recess is provided.

  In the suspension clamp device according to the present invention, the engaging claw guided by the engaging recess of the cam member is controlled from the inside of the engaging recess as the link arm is lowered by its own weight in a state where the rotation of the cam member is restricted. A fourth feature is that the cam member is configured to be pushed out once and guided to the lower surface of the cam member near the engaging recess.

  In the suspension clamp device according to the present invention, the engaging claw guided to the lower surface of the cam member near the engaging recess rotates the cam member so that the engaging recess faces upward as the link arm rises. It is the fifth feature that it is configured.

  As described above, according to the suspension clamp device according to the present invention, it is possible to automatically lock the clamp device to the open state or to automatically release the open state by using its own weight, and to work on a workpiece such as stone or concrete products. It has an excellent effect of efficiently performing the work of lifting and lowering to the destination.

A perspective view showing a hanging clamp device according to the present invention, A front view showing the suspension clamp device in a locked state, Front view showing a suspension clamp device in a state where a heavy object is gripped and lifted, It is a figure which shows a locking mechanism, (A) is a front view which shows a locking member, (B) is a front view which shows a cam member, An explanatory view showing the action of the locking mechanism, An explanatory view showing the action of the locking mechanism, It is explanatory drawing which shows the effect | action of a locking mechanism.

  An embodiment for carrying out the present invention will be described with reference to FIGS. In FIG. 1, the code | symbol 100 has shown the suspension clamp apparatus.

  As shown in FIG. 1, the suspension clamp device 100 (hereinafter, referred to as a clamp device 100) includes a pair of clamp arms 101 and 102 that intersect with each other and bend downward in a U-shape. Locking claws 103 and 104 are provided at the lower ends of the clamp arms 101 and 102. A rubber covering portion 105 is provided around the locking claws 103 and 104. Further, a rubber covering portion 106 is also provided on the inner surface of the bent portion of the dogleg shape of the crank arms 101 and 102.

  The pair of clamp arms 101 and 102 are pivotally supported via a central rotation pin 107 so as to be rotatable. Link arms 110 and 111 are rotatably connected to upper ends of the crank arms 101 and 102 via link pins 108 and 109, respectively. The ends of the link arms 110 and 111 are connected to each other via a support pin 112 so as to be rotatable. A reverse U-shaped hook 113 for lifting is attached to the support pin 112.

  In addition, the latching | locking part 113 of FIG. 1 is latched by the hook 10 suspended with a crane apparatus.

  Near the link pin 108 of the link arm 110, a lock member 121 constituting the lock mechanism 120 is suspended via a rotation pin 122 so as to be rotatable. A cam member 123 constituting the lock mechanism 120 is suspended near a bent portion of the clamp arm 102 via a rotation pin 124 so as to be rotatable.

  The locking mechanism 120 uses the weight of the clamping device 100 to lock the clamping device 100 in an open state as shown in FIG. 2 in cooperation with the locking member 121 and the cam member 123. With the cooperation of the cam member 123, the locked state is released, and the work W is gripped by the left and right clamp arms 101 and 102, and the work W is lifted and hung by the clamp device 100 as shown in FIG. Is possible.

  As shown in FIG. 4A, the lock member 121 of the lock mechanism 120 can be rotated around the rotation pin 122, and a convex engagement claw 125 is provided at the tip 121a. . A curved portion 121 b is provided on the inner surface of the lock member 121 in accordance with the turning locus of the cam member 123.

  As shown in FIG. 4B, the cam member 123 is rotatable around the rotation pin 123, and an engagement recess 126 that engages with the engagement claw 125 when the crank device 100 is opened is formed. Has been. An upper guide portion 123a for guiding the engagement claw 125 to the engagement recess 126 is provided on the upper surface side of the engagement recess 126, and the lower surface side of the engagement recess 126 abuts on the released engagement claw 125 and locks it. A lower guide portion 123b that rotates the cam member 123 so that the engaging recess 126 faces upward in conjunction with the pulling of the member 121 is provided.

  As shown in FIG. 5A, a restriction pin 127 for restricting the counterclockwise rotation of the lock member 121 is provided in the vicinity of the rotation pin 122, and a cam member 123 is provided in the vicinity of the rotation pin 124. A restriction pin 128 is provided for restricting the counterclockwise rotation.

  Next, the usage method and operation of the clamp apparatus 100 having the above-described configuration will be described below with reference to the drawings.

  First, the clamp device 100 is temporarily placed on the ground, and the engagement claw 125 of the lock member 121 is manually engaged in the engagement recess 126 of the cam member 123 (FIG. 5 (A)). 100 is locked open.

  The clamp device 100 is lifted halfway by the crane device, and the operator lifts the clamp arm 101 on one side and manually engages the engagement claw 125 of the lock member 121 into the engagement recess 126 of the cam member 123, thereby It may be locked.

  When the clamp device 100 is locked in the open state, the clamp device 100 is pulled up by the operation of the crane device, moved directly above the workpiece W (see FIG. 2), and the clamp device 100 is lowered onto the upper surface of the workpiece W.

  When the clamp device 100 is lowered on the upper surface of the workpiece W, the link arms 110 and 111 are lowered by its own weight, and the clamp arms 101 and 102 are about to open to the left and right. Then, on the way, the engaging claw 125 of the lock member 121 that is going to descend in conjunction with the link arm 110 is once pushed out from the engaging recess 126 of the cam member 123 (FIG. 5B), and finally the cam. It is guided so as to enter the lower surface of the member 123 (FIG. 5C).

  Next, when the clamp device 100 is pulled up by operation of the crane device, the cam member 123 rotates clockwise so that the engagement recess 126 faces upward in cooperation with the engagement claw 125 of the lock member 121 on the way. Then, the engaging claw 125 of the lock member 121 is completely separated from the cam member 123 (FIGS. 6B to 6C). As a result, the lock mechanism 120 is completely released.

  Then, when the clamp device 100 is further lifted by operating the crane device, the locking claws 103 and 104 at the tips of the crank arms 101 and 102 are firmly attached to the side surface of the workpiece W to hold the workpiece W and securely hold the workpiece W. Lift up (see Fig. 3).

  Next, when the lifted work W is moved to the destination by the operation of the crane device and lowered, the link arms 110 and 111 are lowered by the weight of the clamp device 100, and the clamp arms 101 and 102 are opened to the left and right. Release the grip of W. In conjunction with these operations, the lock member 121 approaches the cam member 123 (FIG. 7A), and then the lock member 121 contacts the upper guide portion 123a of the cam member 123 (FIG. 7B). )), And finally, the engagement claw 125 automatically engages in the engagement recess 126 of the cam member 123 (FIG. 7C).

  In this state, when the clamp device 100 is pulled up by operating the crane device, the next work W can be lifted while the clamp device 100 is locked in the open state as shown in FIG.

  As described above, the clamp device 100 in the open state is lowered onto the workpiece W and automatically gripped, the workpiece W is lifted and lowered to the destination, and the operation of returning the clamp device 100 to the next workpiece W is repeated. It can be carried out.

  According to the suspension clamp device 100 of the present embodiment, the clamp device 100 is held in the open state and the workpiece W is held by the cooperation of the lock member 121 and the cam member 123 of the lock mechanism 120 using the weight of the device. Thus, each work of lifting the workpiece W and hanging it to the destination can be performed efficiently.

  In addition, since the lock mechanism 120 can be automatically locked and unlocked by operation of the crane device, an operator who operates the crane device alone does not need an assistant, and works W Can be carried out and suspended to the destination.

  The work W to be lifted and hung by the clamp device 100 of this embodiment is preferably a heavy article such as a stone, a concrete product, a log product, a steel pipe product, or a drum can, but is not limited thereto. Further, the locking claws 103 and 104 of the clamping device 100 are not limited to the shape shown in FIG. 1, and may be shaped to be scooped from below according to the outer shape of the workpiece W (for example, a log product, a steel pipe product, etc.).

  Thus, by using the hanging clamp device according to the present invention, each work of lifting the workpiece W and hanging it to the destination can be performed efficiently.

  The suspension clamp device according to the present invention can be widely used as a suspension clamp device that lifts and suspends workpieces such as stones and concrete products.

DESCRIPTION OF SYMBOLS 100 Suspension clamp apparatus 101,102 Clamp arm 103,104 Locking claw 105,106 Rubber coating | cover part 107,122,124 Rotating pin 108,109 Link pin 110,111 Link arm 112 Support pin 113 Latching part 120 Locking mechanism 121 Lock member 123 Cam member 123a Upper guide portion 123b Lower guide portion 125 Engagement claw 126 Engagement recess 127, 128 Restriction pin W Workpiece

Claims (5)

A pair of clamp arms that can be turned around the rotation pin and can be rotated via a link pin. In a suspension clamp device comprising a pair of linked arms, a hook portion attached to the tip of the link arm via a support pin, and a lock mechanism for holding the clamp arm open,
The lock mechanism includes a lock member suspended near a link pin of a link arm through a rotation pin and provided with an engaging claw at a tip portion thereof, and is supported in a rotation restricted state near a bent portion of a clamp arm and is self-weighted. A suspension clamp device comprising a cam member provided with an engagement recess that engages with an engagement claw of the lock member as the link arm is lowered by the above.   A rotation restricting pin is provided in the vicinity of the cam member to restrict the rotation of the cam member when guiding the engaging claw of the lock member to the engaging recess while lowering the link arm by its own weight. The suspension clamp device according to claim 1.   Guided toward the engagement recess while abutting the engagement claw of the lock member in a state where the rotation of the cam member is regulated as the link arm descends due to its own weight near the engagement recess on the upper surface of the cam member. The suspension clamp device according to claim 1, wherein an upper guide portion is provided.   The engaging claw guided to the engaging recess of the cam member is once pushed out of the engaging recess as the link arm descends due to its own weight in a state where the rotation of the cam member is restricted, and the cam member is engaged. The suspension clamp device according to any one of claims 1 to 3, wherein the suspension clamp device is configured to be guided to a lower surface near the recess. The engaging claw guided to the lower surface of the cam member close to the engaging recess is configured to rotate the cam member so that the engaging recess faces upward as the link arm is raised. The suspension clamp device according to claim 4.

Images