JP5674588B2 - No reaction hammer - Google Patents

Description

  The present invention relates to a reactionless hammer that does not bounce even when an object is hit.

  A hammer that strikes, crushes, bends and stretches, removes strain, positions, and performs other operations when hitting the object causes rebounds due to reaction when hit, and the efficiency, accuracy, and efficiency of the operation decrease. There are many unreacted hammers and shockless hammers that have taken measures to suppress the bounce, and one of them is, “A vacancy is formed inside the hammer head, and the weight of the hammer head is weighted to this vacancy. By adopting a structure that accommodates steel pellets set to 60 to 80% of "the steel pellet in the hammer head cancels the reaction that occurs when the hammer collides with the object. A technique of “reaction can be minimized or eliminated” is disclosed in Patent Document 1.

  However, in order to confirm the function of the non-reaction hammer, as shown in FIG. 4, an iron pipe is provided with a viewing hole (a) in the length direction on a part of the peripheral surface, and a striking portion (robot) is formed at one end. ) And the other end is closed with a lid plate (c) to form a hammer head (d), and a cylindrical case (e) of transparent synthetic resin is fitted inside the hammer head (d). A small iron ball group (f) whose weight is set to 60% of the weight of the hammer head (d) is accommodated in the inside of the h), and the opening end of the hammer head (d) is closed with a lid (c). A test hammer (H2) in which a handle (g) was attached to the middle of (d) with a fixture (chi) was manufactured, and a function test for suppressing recoil was performed. As a result, when the object (re) is struck by the striking part (b) of the hammer head (d) as shown in FIG. 5 (a), the small iron ball group (f) moves the striking part (b) by the reaction of the striking. As shown in FIG. 5 (b), it is bounced back so as to collide with the cover plate (c), and when it hits the cover plate (c), it is bounced back toward the striking part (b) by its reaction. In order to cause the hammer head (d) to bounce in the opposite direction by colliding with the hitting part (b) causing the rebound as shown in FIG. 5 (c), the striking part (b) of the hammer head (d) Since it falls on the object (re) and strikes the object (re) as shown in FIG. 5 (a), the small iron ball group (f) in the hammer head (d) again moves the striking part (b). Bounce off the hammer head (d) by rebounding away and bounce toward the striking part (b) in the same manner as above. The hammer head (d) has an effect of suppressing the recoil, compared with the case where the hammer head (d) repeats the rebound about 3 times and stops and then the general hammer repeats the rebound 7 times or more. No recoil that does not bounce when hitting an object cannot be achieved.

No. 2004-50214

  The present invention provides a recoilless hammer in which when a target is hit with a hammer head, the hammer head does not rebound due to the recoil of the hit, but remains at the hit position and acts on this part without loss. Is an issue.

In order to solve the above-mentioned problem, a reactionless hammer according to claim 1 is:
A striking part formed on one side facing the object to be hit;
Having an end formed on the opposite side,
In a hammer head with a vacant space inside,
In the vacancy formed inside the hammerhead,
1 and the weight member that set the weight 25 to 50% of the hammer head weight,
A spring that holds the weight body at a position separated from the hammer head striking portion ;
Is housed,
The spring
When stretched, one end of the weight body is pressed against the lid, and when shrunk, the weight body is set in the hole so that the weight body collides with the striking portion,
Occurs when the hammer head is swung down and the object is hit with the hitting portion.
The reaction force that the object bounces off the hammerhead,
The weight housed in the vacant chamber of the hammer head is restrained by compressing the spring and causing it to collide with the striking portion of the hammer head,
It is characterized by not causing the hammerhead to bounce or vibrate .

  The invention according to claim 2 is characterized in that the weight housed in the vacant chamber is formed with a ventilation path for transferring air from one side of the vacant chamber to the other side.

  According to the first aspect of the present invention, when an object is hit with a hammer head, the weight housed in the inner empty chamber compresses the spring and rebounds by the reaction of the hit to the hit portion of the hammer head. The impact of the hammer head bounces and vibrates, preventing the loss of the battering force consumed by the bounce and vibration, improving work efficiency, and the hammer head that hits the object at its position. If you do not move to the target position, you can apply the exact striking force to the target position of the target and perform the work exactly as desired, and the hammer head will cause deformation and damage of the target. There is nothing.

  According to the second aspect of the present invention, when the weight body accommodated in the empty chamber of the hammer head moves, the air in the empty chamber is transferred from one side to the other through the ventilation path, and the weight is transferred to one and the other of the empty chambers. Does not cause a pressure difference in the air that impedes body movement.

The side view which shows the external appearance of the non-reaction hammer which concerns on this invention. The vertical side view which shows the use condition of a hammer same as the above. The longitudinal cross-sectional side view which shows the state by which suppression of the recoil by the weight body was performed in the empty room of a hammer same as the above. These are the vertical side views of the test hammer formed with the technique described in US-A-2004-50214. (A) (b) (c) is the same as above. When the small iron ball group housed in the vacant chamber of the test hammer hits the object, it bounces back at that moment and hits the hammer head hitting part that bounces back late. Explanatory drawing which shows the state to suppress.

  Embodiments of a reactionless hammer according to the present invention will be described below with reference to the drawings.

  1 and 2, H1 represents a non-reaction hammer according to the present invention. This non-reaction hammer H1 forms a vacant chamber 2 inside the hammer head 1 and is formed in the vacant chamber 2. A structure in which a weight 3 whose weight is set to 25 to 50% of the weight of the hammerhead 1 is accommodated, and a spring 5 that holds the weight 3 at a position separated from the striking portion 4 of the hammerhead 1 is accommodated. belongs to.

  The hammerhead 1 is usually made of steel and has a hexagonal cross section at the center as shown in FIG. 1, for example, so that the striking portion 4 on one side and the end 6 on the opposite side have a circular cross section. Thus, the above-described vacant chamber 2 having a circular cross section that opens to the end portion 6 side is formed inside, and the end portion 6 side that the vacant chamber 2 opens is closed by fitting and welding the lid 7. Then, a handle 9 is attached to one side of the intermediate portion of the hammerhead 1 with a mounting bracket 8.

  The weight body 3 accommodated in the vacant chamber 2 of the hammer head 1 is usually formed of a steel material in a circular cross section that fits the vacant chamber 2, and the spring 5 is formed in a portion corresponding to the striking portion 4 of the hammer head 1. The weight 10 is set to 25% to 50% of the hammer head according to the material of the object and the variation of the hitting, etc. Try to get a recoil effect.

  The weight body 3 has a groove air passage 11 as shown by a solid line in FIG. 2 or a hole air passage 11 penetrating the weight body 3 in an axial direction as shown by a dotted line in FIG. Thus, when the weight body 3 moves in the empty chamber 2 through these ventilation passages 11, the movement of the weight body 3 is not hindered by an increase in air pressure by moving one air of the empty chamber 2 to the other. .

  The groove air passage 11 or the hole air passage 11 is omitted when a gap is formed between the inner wall of the empty chamber 2 and the outer wall of the weight body 3 to move air from one of the empty chambers 2 to the other. be able to.

  A spring 5 that separates the weight 3 from the striking portion 4 of the hammer head 1 is a spring steel material. When the spring 5 is extended, one end of the weight 3 is pressed against the lid 7, and when it is shrunk, the spring 3 is accommodated in the hole 10 and is retracted. The strength is set to such an extent that the weight 3 does not naturally fall due to the action of gravity.

  The material and shape of the weight 3 accommodated in the hammer head 1 and the empty chamber 2 of the non-reaction hammer H1 are metal, synthetic resin, wood, depending on the material and properties of the object to be hit and the hitting conditions. Other suitable materials are selected and formed into a shape suitable for the type of operation to obtain the best results for a wide variety of materials and operations.

  The non-reaction hammer H1 according to the present invention is not limited to one in which the hammer head 1 is attached to the handle 9 and operated manually as described above, and the hammer head 1 is movably supported by a machine or device. Thus, the object can be widely used in various fields by moving it up and down with power and hitting the object with the striking unit 4, but the drawings and explanations relating to this use example are omitted. To do.

  As shown in FIG. 2, the non-reaction hammer H1 configured as described above supports the nail 14 upright with a finger 13 or the like as shown in FIG. When the hammer head 1 is swung down as shown by the arrow and is struck by the striking portion 4, a reaction force is generated at which the nail 14 repels the hammer head 1. However, at this time, the weight body 3 accommodated in the empty chamber 2 of the hammer head 1 compresses the spring 5 and collides with the striking portion 4 of the hammer head 1 to suppress the recoil of the hammer head 1 and rebound. Since no vibration is caused, the striking portion 4 contacts the head 15 of the nail 14 as shown in FIG. 3, and a striking force that does not cause a damping is applied to this portion, so that the nail 14 is straightly driven deeper than a normal hammer. The head 15 of the nail 14 was not deformed or damaged.

  Next, several other types of work performed using the non-reaction hammer H1 will be described with the drawings omitted.

  When fitting the shaft or bearing to the receiving hole, place one end of the shaft or bearing in alignment with the receiving hole to be fitted, and hit the other end with the hammer head striking part. The dead weight prevents the recoil from hitting and prevents the hammer head from bouncing back or vibrating. For this reason, the striking part comes into contact with the ends of the shaft and the bearing, applies a striking force that does not cause attenuation to these parts, and smoothly fits the shaft and the bearing into the receiving hole like pressing by a press. At that time, the hit end was not damaged.

  In the work of hitting the center punch on the member, align the point of the punch with the intersection of the ruled lines drawn on the member, and hit the punch head with the hammer head hitting part, the weight housed in the empty space in the hammer head The body deters the recoil from hitting and does not bounce or vibrate the hammerhead. For this reason, the striking part comes into contact with the head of the punch, and a striking force that does not cause a damping is applied to this part, thereby forming a conical concave part that determines the drilling position at the pointed end. Since the pointed tip is still in the recess even after the formation of the recess, the punches for expanding the recesses can be made quickly and twice so that the position is not displaced.

  In the work of driving a wooden pile into the ground, when a wooden pile with a sharp tip is set up on the ground and the center of the head of the wooden pile is hit with the hammer head hitting part, the weight housed in the empty space in the hammer head Suppresses the recoil of the blow and does not cause the hammerhead to bounce or vibrate. For this reason, the striking part comes into contact with the center of the head of the wooden pile, applies a striking force that does not cause attenuation to this part, and drives the wooden pile into the ground as if it was pressed by a press. Compared with hammering piles, it was possible to drive with less than one third of the number of hits, and the heads of the wooden piles that were prone to crushing and cracking due to the hits held almost the original pattern.

  When positioning the member sandwiched between the vice, the member is sandwiched between a vise with a ruler on the lower side, temporarily tightened, and the upper central portion of this member is struck by the hammer head striking portion. The weight housed in the vacant space in the head suppresses the recoil of the impact and does not cause the hammer head to bounce or vibrate. For this reason, the striking part contacts the upper part of the member and applies a striking force that does not cause attenuation to this part. Therefore, the member can be positioned by pressing the entire lower side against the ruler by applying a single striking. Compared with the work by the conventional hammer which required several hits, the efficiency was greatly improved, and no hitting marks were generated in the hit parts of the members.

  In the work of removing the distortion that strikes and corrects the part of the sheet metal that has been distorted with a hammer, or in the waisting work in which the other part is struck and stretched to increase the tension of the sawtooth formation part of the saw material, When a distorted portion or a portion where the saw material is extended is struck by the hammer head striking portion, the weight housed in the vacant space in the hammer head suppresses recoil of the striking and does not bounce or vibrate the hammer head. For this reason, the striking part comes into contact with the upper part of the member, applies a striking force that does not cause attenuation to this part, and corrects the distorted part of the sheet metal and stretches the part where the saw material is stretched. The number of strikes of the sheet metal or saw material required for stretching was one-fifth compared with the case of using a conventional hammer, and no strike marks were made on the sheet metal or saw material.

  When joining pillars, beams, girders, etc. of wooden houses with tenons and holes, align the holes provided in the beams with the tenons provided in the pillars, and hit the outside of the beam with a non-reaction hammer hitting part called `` Kakeya '' When hit, the weight housed in the vacant space in the hammer head suppresses the recoil of the hit and does not cause the hammer head to rebound or vibrate. For this reason, the striking part contacts the upper side of the beam, applies a striking force that does not cause attenuation to this part, fits the tenon provided on the column to the hole provided on the beam, and joins the column and the beam The number of hits of the beam required for joining was less than half compared with the case of using a conventional hammer, and the head did not produce a hit mark that was generated by hitting with a conventional hammer. .

  When the hammer head hits the object with the hammer head, the hammer head does not rebound, but stops at the hit position and transmits the hit force to the hit position without loss due to the reaction. Driving, deformation, distortion removal, positioning, and other operations can be performed with high efficiency, accuracy, and efficiency.

H1 Non-reaction hammer 1 Hammer head 2 Vacant room 3 Weight body 4 Strike part 5 Spring

Claims (2)

A striking part formed on one side facing the object to be hit;
Having an end formed on the opposite side,
In a hammer head with a vacant space inside,
In the vacancy formed inside the hammerhead,
1 and the weight member that set the weight 25 to 50% of the hammer head weight,
A spring that holds the weight body at a position separated from the hammer head striking portion ;
Is housed,
The spring
When stretched, one end of the weight body is pressed against the lid, and when shrunk, the weight body is set in the hole so that the weight body collides with the striking portion,
Occurs when the hammer head is swung down and the object is hit with the hitting portion.
The reaction force that the object bounces off the hammerhead,
The weight housed in the vacant chamber of the hammer head is restrained by compressing the spring and causing it to collide with the striking portion of the hammer head,
Non-reaction hammer characterized by preventing the hammer head from bouncing or vibrating . 2. The reactionless hammer according to claim 1, wherein the weight housed in the vacant chamber is formed with a ventilation path for transferring air from one side of the vacant chamber to the other side.

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