JP7244066B2 - rescue jack - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Law 1. Posted on the following website on May 14, 2018 (https://rescuejack-sto.shop-pro.jp/) 2. 3. Sold to Nichibo Co., Ltd. on June 13, 2018. 3. Exhibited at the 6th Chubu Lifeguard TEC 2018 (Port Messe Nagoya) on May 17th and 18th, 2018. Exhibited at Mitaka Disaster Prevention Marche on March 10, 2019 5. Published in the magazine "Jigyou" on November 7, 2018 6. 6. Exhibited and used at the Kobazuka block disaster prevention drill in Kiyosu City, Aichi Prefecture on October 28, 2018. Published in Chubu Keizai Shimbun on June 15, 2018 8. Published in the Chubu Keizai Shimbun on June 29, 2018 9. Published in the Chubu Keizai Shimbun on September 20, 2018 10. Published in the Chubu Keizai Shimbun on January 29, 2019 11. Published in the magazine "Columbus" on December 28, 2018 12. Published in the magazine "New Product Information" on November 1, 2018 13. Published in the Nikkan Kogyo Shimbun on July 23, 2018 14. Published in the Nikkei Sangyo Shimbun on July 2, 2018 15. Published in Nihon Keizai Shimbun on June 21, 2018 16. Published in the public relations magazine "Nisseki Aichi" on January 1, 2019 17. Published in the Hokkaido Kensetsu Shimbun on August 16, 2018 18. 19. Displayed and used at a disaster prevention drill in Suehiro-cho, Kariya City, Aichi Prefecture on October 7, 2018. Donated products to Nagoya City Hall on July 4, 2018

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rescue jack for rescuing a person trapped under a heavy object such as furniture that has fallen during an earthquake.

As a jack that can be used for this type of application, there is, for example, the one shown in Patent Document 1. Here, a movable claw that supports a part of a heavy object is attached to an erected screw, and the screw is rotated. A structure is disclosed for lifting a heavy object by moving the moving claw upward by moving the moving claw.

JP 2007-261781

However, in the above-described conventional structure, the moving pawl can only be moved within the length range of the raised screw. There was a problem that it was not compact.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a rescue jack that has a sufficiently compact shape and is capable of lifting a heavy object high.

In order to achieve the above object, in the first invention, a screw type cylinder member (2) which is provided in a standing posture on a base (1) and which can extend and contract in the vertical direction, and the screw type cylinder member (2) are provided. An operating mechanism (21) for extending and retracting, and a proximal end thereof fixed to the upper end of the screw-type cylinder member (2), extending downward, and a distal end ( 32) is provided with a support arm (3) positioned near the floor (L) on which the base (1) is installed, and the tip (32) of the support arm (3) is bent substantially horizontally to receive it. The screw-type cylinder member provided on the base is inclined, and the support arm is provided on the inclined side.

According to the first aspect of the present invention, since the screw-type cylinder member that can be expanded and contracted in the vertical direction is used, the rescue jack becomes sufficiently compact when contracted, and is easy to transport and store. In particular, the threaded cylinder member is also lighter than hydraulic cylinders and the like. Since the tip of the support arm extending downward from the upper end of the cylinder member and reaching the vicinity of the floor surface is used as the receiving portion, the receiving portion can be inserted into the space even if the gap created below the heavy object is small. can lift heavy objects. In addition, when one end of a heavy object is lifted by the receiving portion of the support arm, even if the heavy object turns and rises in a direction away from the rescue jack, the screw-type cylinder member is inclined in this direction, so the receiving portion does not move. The heavy object is moved in the separation direction, and one end of the heavy object does not come off from the receiving part, and a reliable lifting operation is performed.

In the second aspect of the present invention, the base (1) is provided with a leg (111) projecting in the direction of inclination of the screw type cylinder member (2), and the moment due to the load received by the receiving portion (32) moves the leg. Using the tip of the part (111) as a fulcrum, lift the edge of the base (1) on the side opposite to the side where the leg part (111) is formed.

According to the second aspect of the present invention , since the edge of the base on the side opposite to the side on which the legs are formed is lifted as the important object is lifted, the receiving portion is further moved to follow the moving direction of the heavy object. Even if the end portion is lifted higher, the end portion is more effectively prevented from coming off the receiving portion of the support arm. Also, by appropriately setting the length of the legs, it is possible to optimally adjust the lifting height of the heavy object at which the edge of the base starts to be lifted.

In the third aspect of the present invention , a recess (311) opening downward is formed in the base end (31) of the support arm (3), and the recess (311) is inserted into the threaded cylinder member (2). The upper end (24) is covered from above, and the opposite side walls of the recess (311) and the upper end (24) of the screw-type cylinder member (2) are connected by a pin body (312) penetrating in the horizontal direction. , the end wall (313) opposite to the side from which the support arm (3) extends is welded and fixed to the upper end (24) of the screw type cylinder member (2).

According to the third aspect of the present invention , when a heavy object is supported by the receiving portion of the support arm, the load becomes a moment around the pin body. Even if a load is applied, the base end of the support arm is securely fixed without being separated from the upper end of the screw type cylinder member.

In the fourth aspect of the present invention, a non-slip portion (315) is formed on the upper surface of the base end (31) of the support arm (3), and the upper surface is used as a receiving surface.

According to the fourth aspect of the present invention , after the heavy object is lifted to a certain height by the receiving portion of the supporting arm, the heavy object is further raised using the base end of the supporting arm, that is, the receiving surface of the upper end of the screw-type cylinder member. It is possible to lift.

In the fifth aspect of the present invention , a part of the supporting arm (3) contacts a part of the base (1) when the screw-type cylinder member (2) is contracted so as to further contract the screw-type cylinder. A stopper member (33) is provided to regulate the contraction end.

According to the fifth invention , the screw type cylinder can be reliably stopped at its contraction end.

The symbols in parentheses above refer to the corresponding relationship with specific means described in the embodiments described later.

As described above, according to the rescue jack of the present invention, a heavy object can be lifted high with a sufficiently compact shape.

1 is an overall perspective view of a rescue jack showing an embodiment of the present invention; FIG. It is a side view of a jack for rescue. It is a top view of a jack for rescue. It is a front view at the time of extension of a jack for rescue. It is an enlarged sectional view of the upper end part of a cylinder member. It is an enlarged side view of the upper end part of a cylinder member. It is an enlarged front view of the upper end portion of the cylinder member. It is a side view which shows the use condition of a jack for rescue. It is a side view which shows the use condition of a jack for rescue.

The embodiments described below are merely examples, and various design improvements made by those skilled in the art are also included in the scope of the present invention without departing from the gist of the present invention.

FIG. 1 shows an overall perspective view of the rescue jack of the present invention. The rescue jack J is provided with an extendable screw-type cylinder member 2 (hereinafter simply referred to as cylinder member) on a base 1 whose details will be explained below, in an upright position, and a downwardly elongated The upper end (base end) 31 of the extending support arm 3 is fixed. The extension and contraction of the cylinder member 2 is achieved by engaging the front end hook portion 41 of the rod-shaped handle 4 shown in FIG. This is done by rotating the L-shaped operating rod 42 .

FIG. 2 shows a side view of the rescue jack J, and FIG. 3 shows a plan view thereof. The base 1 of the rescue jack J is composed of a footrest 11 positioned below and a receiving base 12 placed on the upper surface of the footrest 11 . The pedestal 11 is a molded metal plate with legs 111 protruding at left and right positions (up and down in FIG. 3), and its upper surface slopes downward toward the legs 111 (FIG. 2). The cradle 12 is a substantially rectangular metal plate molding (FIG. 3), and its four corners are fixed to the base 11 by caulking pins 13 .

The cylinder member 2 has a case body, which is composed of a bowl portion 22 in the lower half and a cylindrical portion 23 in the upper half. The lower opening edge of the bowl portion 22 is crimped and fixed to the cradle 12, and the rotary operation portion 21 protrudes from a cylindrical opening 221 (FIG. 2) on the side surface thereof. The rotary operation portion 21 is provided with a locking hole 211 into which the tip hook portion 41 of the rod-shaped handle 4 (FIG. 1) is inserted. A small-diameter bevel gear 51 is attached to the inner end of the rotary operation portion 21 . The bevel gear 52 is rotatably supported in parallel with the upper surface of the leg 11 by a thrust bearing 53 provided on the cradle 12 .

A threaded shaft 54 is positioned in the center of the cylindrical portion 23 of the cylinder member 2, and an auxiliary threaded cylinder 55, an inner cylinder 56, and an outer cylinder 57 are positioned from the inside to the outside on the outer periphery thereof. The upper end of the inner cylinder 56 protrudes upward from the cylindrical portion 23 and forms the upper end 24 of the cylinder portion 2 . The lower end of the screw shaft 54 is fixed to the center of the bevel gear 52 . The structure of the cylinder member 2 described above is known, and is disclosed, for example, in Japanese Utility Model Application No. 9-6313.

When the rotary operation portion 21 is rotated in one direction by the rod-shaped handle 4, the bevel gear 52 and the screw shaft 54 integrated therewith are rotated via the bevel gear 51. As shown in FIG. As the screw shaft 54 rotates, the auxiliary screw cylinder 55 and the inner cylinder 56 rise along it. When the auxiliary screw cylinder 55 reaches the upper end of the screw shaft 54 , they rotate together, and the inner cylinder 56 screwed into the auxiliary screw cylinder 55 pulls up the outer cylinder 57 and raises it along the auxiliary screw cylinder 55 . be done. FIG. 4 shows a state in which the inner cylinder 56 has reached the raised end, and the cylinder member 2 expands to approximately three times its height from the contracted state shown in FIG. When the inner cylinder 56 is lowered and the cylinder member 2 is contracted, the rod-shaped handle 4 is rotated in the opposite direction.

In FIG. 2, the cylinder member 2 is provided with a support arm 3 on its inclined side . That is, in the present embodiment, the support arm 3 is a rod-shaped body that is forged and has a substantially rectangular cross section. It bends horizontally in the opposite direction to form a thick plate-like receiving portion. When the cylinder member 2 is contracted, the lower surface of the receiving portion 31 at the tip of the support arm 3 is positioned parallel to and close to the floor surface L on which the base 1 is installed.

As shown in FIG. 5, the base end 31 of the support arm 3 is formed with a circular recess 311 following the cross section of the inner cylinder 56 of the cylinder member 2. The upper end 24 of the member 2 is covered from above, and a through hole is provided that penetrates in the horizontal direction through each side wall of the recess 311 facing in the front-back direction of the paper surface of FIG. 5 and the upper end 24 of the cylinder member 2. A proximal end 31 of the support arm 3 is connected to the upper end 24 of the cylinder member 2 by inserting a spring pin 312 therein.

Then, as shown in FIGS. 6 and 7, the end wall 313 of the recess 311 on the side opposite to the side from which the support arm 3 extends is attached to the upper end of the inner cylinder 56 over a range of 1/4 or more of the entire circumference. are welded (reference numeral 314) and fixed. A pair of non-slip portions 315 extending in parallel are formed on the upper surface of the proximal end 31 of the support arm 3 so that the upper surface of the proximal end 31 can be used as a receiving surface for a heavy object.

According to such a structure, when a heavy object is supported by the receiving portion 32 at the tip of the support arm 3, the load becomes a moment around the spring pin 312 at the base end 31 of the support arm 3. 314 is strongly received. As a result, the base end 31 of the support arm 3 does not separate from the upper end of the inner cylinder 56 even if a large load is applied when lifting a heavy object.

A triangular stopper portion 33 (FIG. 2) protrudes from the rear surface of the tip portion of the support arm 3. When the cylinder member 2 is contracted, the right-angled wall of the stopper portion 33 abuts against the peripheral edge of the cradle 12. restricts the contraction operation of the cylinder member 2.

The operation of lifting the heavy object M with the rescue jack J having such a structure will be described with reference to FIGS. 8 and 9. FIG. When the cylinder member 2 of the rescue jack J is contracted, as shown in FIG. 8(1), the lower surface of the receiving portion 32 at the tip of the support arm 3 is close to the floor surface L on which the base 1 is installed. and is positioned between the left and right leg portions 111 of the footrest 11 . In this state, the rescue jack J is brought close to the heavy object M, and the receiving part 32 is inserted into the gap S created between the heavy object M and the floor surface L by the person being rescued.

When the rod-shaped handle 4 is used to rotate the rotary operation portion 21 to extend the cylinder member 2 ((2) in FIG. 8), the heavy object M is lifted by the receiving portion 32 of the rising support arm 3 . At this time, the heavy object M is lifted so as to turn upward around a portion (not shown) in contact with the floor surface L opposite to the portion where the gap S is created (white arrow in the figure). As a result, the heavy object M moves away from the rescue jack J. In the present embodiment, the cylinder member 2 is inclined in this direction, so that the support arm 3 is lifted and the receiving portion 32 is also heavy. It moves following the moving direction of the object M. As a result, the end portion of the heavy object M supported by the receiving portion 32 does not come off from the receiving portion 32, and a reliable lifting operation is performed.

Further, when the cylinder member 2 is extended and the heavy object M is lifted high, a moment due to the load of the heavy object M is generated in the entire tilting cylinder member 2, and the tip of the leg portion 111 of the base 1 is used as the fulcrum as shown in FIG. , the edge of the base 1 on the side opposite to the side on which the leg portion 111 is formed is lifted (black arrow in the figure), and the receiving portion 32 further follows the moving direction of the heavy object M and moves. As a result, the end of the heavy object M is prevented from coming off the receiving portion 32, and the lifting operation is performed more reliably. Although this operation can be realized without providing the leg portion 111, by appropriately setting the length of the leg portion 111, it is possible to optimally adjust the lifting height and the like at which the above operation occurs.

In addition, the cylinder member is not limited to the two-stage telescopic type described above.

DESCRIPTION OF SYMBOLS 1... Base, 11... Leg stand, 111... Leg, 12... Cradle, 2... Screw-type cylinder member, 21... Rotary operation part (operation mechanism), 24... Upper end, 3... Support arm, 31... Base end , 311... recess, 312... spring pin (pin body), 313... end wall, 315... non-slip part, 32... tip (receiving part), 33... stopper member, L... floor surface.

Claims (5)

A screw-type cylinder member provided on a base in a standing posture and capable of extending and contracting in the vertical direction, an operation mechanism for expanding and contracting the screw-type cylinder member, and a base end fixed to the upper end of the screw-type cylinder member. and a support arm extending downward, the tip of which is positioned near the floor surface on which the base is installed at the contracted end of the screw-type cylinder member, the tip of the support arm being bent substantially horizontally. A rescue jack in which the screw-type cylinder member, which serves as a receiving portion and is provided on the base, is in an inclined posture, and the supporting arm is provided on the inclined side. The base is provided with a leg portion projecting in the direction of inclination of the cylinder member, and a moment due to the load received by the receiving portion is used as a fulcrum at the tip of the leg portion, and the edge of the base opposite to the side on which the leg portion is formed. 2. A rescue jack according to claim 1 , wherein the is lifted. A downwardly opening recess is formed in the proximal end of the support arm, and the recess is placed over the upper end of the threaded cylinder member so that the opposed side walls of the recess and the upper end of the threaded cylinder member are separated from each other. is connected by a pin body penetrating in the horizontal direction, and the end wall on the side opposite to the side from which the support arm extends is welded and fixed to the upper end of the screw type cylinder member. jack for. 4. A rescue jack according to any one of claims 1 to 3, wherein a non- slip portion is formed on the upper surface of the base end of said support arm and said upper surface serves as a receiving surface. A stopper member is provided on a part of the support arm to abut against a part of the base when the screw-type cylinder member is contracted to restrict further contraction of the screw-type cylinder and serve as the contraction end. 5. A rescue jack according to any one of 1 to 4 .

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