JP2015107854A - Suspender - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suspender which can lock and unlock a ring gear 2 easily and ensures safety in a suspending operation by locking the ring gear 2 securely.SOLUTION: In a suspender 8, when an insertion pin 10 is inserted to a through hole 6 of a ring gear 2 and a shackle connecting boss 30 is forced upward, each side face contact part 20, 20 of each locking member 12, 12 is brought into contact with a side face on one end side of the ring gear 2, each bottom face contact part 22, 22 is brought into contact with a bottom face on the one end side of the ring gear 2, and the one end side of the ring gear 2 is securely held by cooperation of the insertion pin 10 and each locking member 12, 12.

Description

  The present invention relates to a lifting tool for gripping an article in which a hole extending straight on one end side is lifted by a crane.

  Patent Document 1 below discloses a hanging tool that grips an article in such a manner as to sandwich one end side and the other end side of the article when the article is lifted by a crane. The lifting tool includes a pair of open / close rods whose upper ends are swingably connected to a lifting ring, a pair of leg supports fixedly swingable to the lower ends of the open / close rods, and lower ends of the leg supports. The leg support and each claw plate are approached or separated from each other so that the article can be gripped and released.

  On the other hand, the applicant of the present application, in Japanese Patent Application No. 2012-201414, is fixed to a pair of open / close rods whose upper portions are pivotally attached to each other, a pair of arm members coupled to the lower portion of each open / close rod, The present invention has proposed a hanging tool having a pair of claw members and a fixing mechanism interposed between the opening and closing rods to fix the opening and closing degree of the opening and closing rods. The lifting tool is configured to grip and release an article by approaching or separating each claw member. And according to this suspension tool, in the holding state in which each claw member is approached and grips the article and in the released state in which each claw member is separated and the article is released, the interval between the claw members can be fixed by the fixing mechanism. Therefore, the safety and workability of the hanging work can be improved.

Japanese Utility Model Publication No. 56-44777

  The above-described lifting tool grips an article in such a manner that one end side and the other end side of the article are sandwiched between each leg support and each nail plate (Patent Document 1) or each claw member (Japanese Patent Application No. 2012-20144). Therefore, it needs to be formed corresponding to the width of the article. Therefore, when the width of the article increases, the size of the hanger increases correspondingly and the weight of the hanger also increases. As a result, for the worker, the operation of approaching or separating the nail plates or the like in order to cause the hanging tool to hold the article or release the article held by the hanging tool requires a large operating force. It is a work to take.

  The present invention has been made in view of the above-mentioned facts, and its main technical problem is that the article can be easily grasped and released, and the article is securely grasped to ensure the safety of the hanging work. Is to provide a lifting device.

  According to the present invention, as a suspending tool for achieving the above technical problem, a suspending tool for gripping an article in which a hole extending straight on one end side is formed. A side surface abutting portion extending to the side surface, a bottom surface abutting portion projecting to one side from the tip of the side surface abutting portion, and a connecting portion extending from the base end of the side surface abutting portion to the one side. A locking member that is pivotably connected to the insertion pin, the insertion pin being inserted into the hole of the article, and the extending end of the connecting portion of the locking member is forced upward Then, the side surface contact portion of the locking member is in contact with the side surface on one end side of the article, the bottom surface contact portion is in contact with the bottom surface on one end side of the article, and the insertion pin and the locking There is provided a hanger characterized in that one end side of an article is gripped by cooperation with a member.

  Preferably, a pair of the locking members are disposed at a distance from each other, and the insertion pin is located between the locking members. The extending ends of the connecting portions of the locking members are connected to each other by a connecting piece, and one end of an arm is connected to the connecting piece, and the other end of the arm is connected to a shackle. Is preferred. Conveniently, the other end of the arm is positioned in alignment with the center of gravity of the article while gripping the article. The article is preferably a ring gear in which a plurality of through holes extending in the central axis direction are formed at intervals in the circumferential direction.

  Since the lifting tool of the present invention is configured to grip one end side of an article, it can be formed more compactly than a conventional lifting tool, so that the weight is light. Further, in the hanging tool of the present invention, when the insertion pin is inserted into the hole of the article and the extending end of the connecting portion of the locking member is forced upward, the side contact portion of the locking member is The bottom surface contact portion is in contact with the side surface on one end side, the bottom surface contact portion is in contact with the bottom surface on one end side of the article, and the one end side of the article is gripped by the cooperation of the insertion pin and the locking member. Therefore, when an operator lifts an article with a crane, an operation to be performed in order to cause the lifting tool of the present invention to hold the article is to insert an insertion pin into the hole of the article. As described above, this work is extremely easy without requiring a large operating force because the weight of the lifting tool of the present invention is light.

  After the worker performs this work, if the extension end of the connecting part of the locking member is forced upward by the crane, the locking member turns with respect to the insertion pin by the upward force from the crane, and the side contact The contact portion is in contact with the side surface on one end side of the article, and the bottom contact portion is in contact with the bottom surface on one end side of the article. When the worker further forces the extended end upward, the article is pressed from the side surface contact portion and the bottom surface contact portion of the locking member on the side surface and the bottom surface on one end side. And the force which acts on the side surface and bottom face in the one end side of goods from the side surface contact part and bottom face contact part of a locking member is received by the insertion pin inserted in the hole of goods. As a result, while the article is being lifted by the crane, one end of the article is reliably gripped by the cooperation of the insertion pin and the locking member. Therefore, the safety of the hanging work is sufficiently ensured.

  Further, the force acting on the article from the locking member described above disappears because the upward force from the crane does not act on the extending end of the connecting portion when the article is landed. Therefore, the work to be performed by the worker in order to release the article held by the hanger of the present invention is to pull out the insertion pin from the hole of the article after the article is landed. This operation is also very easy without requiring a large operating force.

1 is a perspective view of a hanger constructed in accordance with the present invention. The front view of the hanging tool shown in FIG. The top view of the hanging tool shown in FIG. Sectional drawing which shows the state by which the insertion pin is inserted in the through-hole of a ring gear. Sectional drawing which shows the state in which the ring gear is hold | gripped with the hanger shown in FIG. Perspective view of ring gear

  Hereinafter, the hanging tool of the present invention will be described with reference to the embodiments shown in FIGS. The article in the embodiment is exemplified by the ring gear 2 shown in FIG. The ring gear 2 is one of the components of a speed reducer (not shown) that decelerates the rotation of a hydraulic motor used in a construction machine such as a hydraulic excavator, and is well known. The ring gear 2 has a cylindrical shape as a whole, and teeth 4 extending radially inward and extending in the axial direction are formed on the inner peripheral surface thereof at intervals in the circumferential direction. It is formed straight in the axial direction. A plurality of through holes 6 extending in the central axis direction are formed between the inner peripheral surface and the outer peripheral surface of the ring gear 2 at intervals in the circumferential direction. The through-hole 6 has a cylindrical shape, and a bolt is inserted when the ring gear 2 is attached to the main body of the speed reducer.

  This will be described with reference to FIGS. A lifting tool generally indicated by 8 has an insertion pin 10 that extends straight, a pair of locking members 12 and 12 that are pivotally connected to the insertion pin 10, and each locking member 12 and 12. The arm 16 is roughly constituted by a connecting piece 14.

  The insertion pin 10 is inserted into the through hole 6 when the ring gear 2 is lifted, and receives the force acting on the ring gear 2 from the respective locking members 12, 12. The insertion pin 10 is formed from a round bar steel material, and the outer diameter thereof is formed corresponding to the inner diameter of the through hole 6, and is preferably slightly smaller than the inner diameter of the through hole 6. A cylindrical insertion hole 10 a extending in the radial direction is formed at the center of the insertion pin 10. The locking members 12 and 12 are connected to each other with a space therebetween by the connecting pin 18 inserted through the insertion hole 10a with the insertion pin 10 interposed therebetween.

  The locking member 12 is formed of a steel plate, and includes a side surface contact portion 20 that extends straight, and a bottom surface contact portion that intersects the side surface contact portion 20 from the tip of the side surface contact portion 20 and protrudes to one side. 22 and a connecting portion 24 extending in the same direction as the direction in which the bottom surface contact portion 22 protrudes from the base end of the side surface contact portion 20, and is formed in a substantially U-shape as a whole.

  A connecting bar 26 that connects the locking members 12 and 12 is joined to the front end side of the opposing surfaces of the side contact portions 20 and 20 by welding. A pair of cylindrical pin holes 24 a and 24 a are formed in each intermediate portion of the connecting portion 24. A pair of cylindrical connecting pin bosses 28, 28 extending in the axial direction are joined to each of the opposing ends of the pin hole 24a by welding. The inner diameter of the connecting pin boss 28 is formed corresponding to the inner diameter of the pin hole 24a, and is preferably the same as the inner diameter of the pin hole 24a. Then, a bolt as a connecting pin 18 is inserted from one side into each pin hole 24a, 24a of each connecting portion 24, 24, each connecting pin boss 28, 28, and the insertion hole 10a of the insertion pin 10. It is screwed with a nut disposed on the side. Accordingly, the locking members 12 and 12 are pivotally connected to the insertion pin 10 at intermediate portions of the connecting portions 24 and 24.

  The extending ends of the connecting portions 24, 24 are connected to each other by joining connecting pieces 14 formed of rectangular steel plates by welding. The connecting piece 14 is bent corresponding to the shape of the extending end of each connecting portion 24, 24. One end of an arm 16 is joined to the connecting piece 14 by welding.

  The arm 16 is made of square steel and further extends from the extending end of the connecting portion 24 with the connecting piece 14 interposed therebetween. A lower portion of one end of the arm 16 is formed with a notch 16 a corresponding to the bent shape of the connecting piece 14 so as to match the connecting piece 14. The arm 16 is formed so that the other end of the arm 16 is positioned in alignment with the center of gravity of the ring gear 2 in a state where the ring gear 2 is gripped by the hanger 8. A cylindrical boss hole 16b extending in the short direction is formed at the other end of the arm 16. A cylindrical shackle connecting boss 30 extending in the axial direction is disposed in the boss hole 16b. The shackle connecting boss 30 is formed of a steel pipe whose outer diameter corresponds to the inner diameter of the boss hole 16b, and its outer peripheral surface is joined to the boss hole 16b by welding.

  The shackle connection boss 30 is connected to the shackle 32 when the ring gear 2 is lifted. The arm 16 is connected to a crane (not shown) via a shackle 32, a chain 34, a suspension ring 36, and the like.

  This will be described with reference to FIGS. When an operator lifts the ring gear 2 with a crane, the work to be performed to cause the lifting tool 8 to grip the ring gear 2 is to insert the insertion pin 10 into the through hole 6 as shown in FIG.

  After the worker performs this work, when the shackle coupling boss 30 is forced upward (direction A) by the crane via the shackle 32 or the like as shown in FIG. 5, each locking member 12 is caused by the upward force from the crane. , 12 pivot with respect to the insertion pin 10 about the connecting pin 18 as an axis. As a result, the side contact portions 20, 20 are in contact with the side surface on one end side of the ring gear 2, and the bottom surface contact portions 22, 22 are in contact with the bottom surface on one end side of the ring gear 2. When the operator further forces the shackle connection boss 30 upward, the ring gear 2 is pressed from the side surface abutting portions 20 and 20 and the bottom surface abutting portions 22 and 22 on the side surface and the bottom surface on one end side. It becomes. The force acting on the side surface and the bottom surface on one end side of the ring gear 2 from each side surface contact portion 20, 20 and each bottom surface contact portion 22, 22 is received by the insertion pin 10 inserted in the through hole 6. Is done. As a result, while the ring gear 2 is being lifted by the crane, one end thereof is reliably gripped by the cooperation of the insertion pin 10 and the locking members 12 and 12.

  Further, in the hanging tool 8, a pair of locking members 12, 12 are disposed with a space therebetween, and an insertion pin 10 is disposed between the locking members 12, 12. For this reason, even if the article suspended by the crane is cylindrical like the ring gear 2, it is securely gripped by the lifting tool 8 without swinging in the horizontal direction. Furthermore, since the other end of the arm 16 is positioned in alignment with the center of gravity of the ring gear 2 in a state in which the ring gear 2 is gripped, the ring gear 2 is gripped by the hanger 8 in a stable posture. Therefore, the safety of the hanging work is sufficiently ensured.

  Since the lifting tool 8 is configured to grip one end side of the ring gear 2, the lifting tool 8 can be formed more compactly than a conventional lifting tool, so that the weight is light. Therefore, the work to be performed in order for the worker as described above to hold the ring gear 2 on the hanging tool 8 is extremely easy without requiring a large operating force.

  The force acting on the side surface and the bottom surface on one end side of the ring gear 2 from each side surface contact portion 20, 20 and each bottom surface contact portion 22, 22 is the upward force from the crane when the ring gear 2 is landed. Since it does not act on the shackle connecting boss 30, it disappears. Therefore, the work to be performed by the worker in order to release the ring gear 2 held by the hanger 8 is to pull out the insertion pin 10 from the through hole 6 after the ring gear 2 is landed. This operation is also very easy without requiring a large operating force.

  Note that the lifting tool 8 of the present invention can hold the article by the cooperation of the insertion pin 10 and the locking member 12 as long as a hole extending straight is formed on one end side of the article. For this reason, the articles | goods which can be hold | gripped with the hanger 8 of this invention are not limited to the cylindrical ring gear 2 in which the through-hole 6 in the Example is formed.

2: Ring gear (article)
6: Through hole 8: Suspension tool 10: Insertion pin 12: Locking member 14: Connection piece 16: Arm 20: Side surface contact part 22: Bottom surface contact part 24: Connection part 32: Shackle

Claims (5)

A hanging tool for gripping an article in which a hole extending straight on one end side is formed,
Straight insertion pin, side contact part extending straight, bottom contact part projecting to one side from the tip of the side contact part, and extending from the base end of the side contact part to the one side And a locking member that is pivotally connected to the insertion pin at an intermediate portion of the connecting portion.
When the insertion pin is inserted into the hole of the article and the extension end of the connecting portion of the locking member is forced upward, the side contact portion of the locking member is brought into contact with the side surface on one end side of the article. Abutting, the bottom surface abutting portion is in contact with the bottom surface on one end side of the article, and the one end side of the article is gripped by the cooperation of the insertion pin and the locking member;
A hanging tool characterized by that.   The suspension member according to claim 1, wherein the locking members are disposed in pairs with a space therebetween, and the insertion pins are located between the locking members.   The extending ends of the connecting portions of the locking members are connected to each other by connecting pieces, one end of an arm is connected to the connecting piece, and the other end of the arm is connected to a shackle. Item 2. The hanging tool according to item 2.   The suspension tool according to claim 3, wherein the other end of the arm is positioned in alignment with the center of gravity of the article in a state where the article is gripped.   The hanger according to any one of claims 1 to 4, wherein the article is a ring gear in which a plurality of through holes extending in the central axis direction are formed at intervals in the circumferential direction.

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