Auxiliary grip of striking tool

Abstract

To achieve compactification of an auxiliary grip of a hammer drill.SOLUTION: An impact absorption part 20 is provided between a base 10 which crosses a striking axial direction and extends and a gripping body which covers the base 10. The gripping body 40 is so connected as to be capable of tilting back and force around a connection shaft 32. The impact absorption part 20 has a common elastic body 21. The gripping body 40 is held by the base 10 in the state that the same can be energized in both of one and the other directions along the striking axis P direction by the common elastic body 21. By this, the gripping body 40 is held at an initial position with respect to the base 10. A tool body performs a striking operation in the state that an operator pushes the gripping body 40 forward and the elastic body 21 is compressed by a rear pusher 24, whereby an impact is absorbed.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present disclosure relates to an auxiliary grip for use with an impact tool such as a hammer drill. [Background technology]

[0002] As disclosed in Patent Document 1, an impact tool known as a hammer drill includes a main handle that an operator holds with one hand and an auxiliary grip that an operator holds with the other. The operator holds the impact tool with both hands to perform tasks such as drilling holes in concrete walls or chipping concrete floors. For this reason, the auxiliary grip is provided with a shock absorbing portion to absorb the impact caused by the impact action of the tool body. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] U.S. Patent No. 9,242,363 Summary of the Invention [Problem to be solved by the invention]

[0004] Conventional auxiliary grips are configured to reduce the impact on the operator's hand by interposing a cushioning member such as a sponge between the grip base and the tool body. However, when a compression spring is used as the cushioning member in series, the shock absorbing portion becomes large. The present disclosure aims to reduce the size of the shock absorbing portion of the auxiliary grip. [Means for solving the problem]

[0005] According to one aspect of the present disclosure, an auxiliary grip for an impact tool includes a base extending intersecting the impact axis direction of the impact tool and a grip body covering the base. The grip body is held on the base by a common elastic body held on the base in a state in which it can be biased in both directions of the impact axis direction.

[0006] Therefore, the grip body is held by a common elastic body so that it can be biased in both directions along the striking axis, thereby making the auxiliary grip compact.

[0007] According to another aspect of the present disclosure, an impact tool includes the auxiliary grip according to the above aspect, thereby making the auxiliary grip of the impact tool more compact. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a vertical cross-sectional view of the impact tool, showing a state in which the auxiliary grip is attached in a downward extending direction. [Figure 2] 2 to 10 are overall perspective views of the auxiliary grip, which has been removed from the impact tool and is seen from the right rear. Unlike Fig. 1, Figs. 2 to 10 show the auxiliary grip in a normal horizontal position, extending leftward from the impact tool. [Figure 3] This is a perspective view of the auxiliary grip, as seen from diagonally rear left and diagonally above. [Figure 4] FIG. [Figure 5] 1 is a top view of the base of the auxiliary grip, with the grip body shown in cross section. [Figure 6] 1 is a perspective view of the base, as seen from diagonally rear left and diagonally above. [Figure 7] 10 is a perspective view of the impact absorbing portion of the base, as viewed from the right rear. [Figure 8] Fig. 6 is a cross-sectional view taken along line VIII-VIII in Fig. 5. This figure shows a vertical cross section of the impact absorbing part. [Figure 9] FIG. [Figure 10] 1 is a perspective view of the grip body, as seen from the left rear. [Figure 11]1 is a top view of the auxiliary grip, showing the left-side horizontal position in which the auxiliary grip is attached to the left side of the tool body. [Figure 12] 10 is a top view of the auxiliary grip, showing the right-side lateral position in which the auxiliary grip is attached to the right side of the tool body. DETAILED DESCRIPTION OF THE INVENTION

[0009] According to one or more embodiments, the base has a base portion attached to the tool body of the impact tool and a tip portion to which the grip body is connected so as to be tiltable in the striking axis direction. An elastic body is disposed in the base, and a connecting portion to which the grip body is connected is disposed in the tip portion spaced from the elastic body. Therefore, by disposing the elastic body in a position close to the tool body and the connecting portion in a position far from the tool body, impacts caused by the striking operation of the tool body are efficiently absorbed.

[0010] According to one or more embodiments, the elastic body is offset from the base in a vertical direction intersecting the extending direction of the base, and is arranged to overlap at least partially with the base in the vertical direction, thereby ensuring compactness of the auxiliary grip in the striking axis direction.

[0011] According to one or more embodiments, the elastic body includes a first elastic body disposed on a first side of the base and a second elastic body disposed on a second side of the base opposite the first side. Therefore, by disposing the elastic bodies on both sides of the base, twisting (pinch) of the elastic bodies is suppressed, and the gripping ability of the grip body is stabilized.

[0012] According to one or more embodiments, the elastic body is held in the holding portion provided on the base by the biasing force of the elastic body. Therefore, it is possible to prevent the elastic body from falling off the holding portion during assembly. This improves the ease of assembly of the grip body to the base. In addition, the initial reaction force of the elastic body is increased, improving the feeling of grip when the worker holds the auxiliary grip.

[0013] According to one or more embodiments, the gripping body has a pusher, one end of which is in contact with the elastic body and the other end of which is in contact with the inner surface of the gripping body, so that the biasing force of the elastic body acts on the inner surface of the gripping body via the pusher.

[0014] According to one or more embodiments, the pusher includes a front pusher that abuts against a front portion of the elastic body and a rear pusher that abuts against a rear portion of the elastic body. Therefore, when the front pusher is displaced rearward against the biasing force of the elastic body, the grip body is urged forward in the direction of the striking axis, and when the rear pusher is displaced forward against the biasing force of the elastic body, the grip body is urged rearward in the direction of the striking axis.

[0015] According to one or more embodiments, the base has a holding portion that holds the elastic body and the pusher, and the holding portion has a portion that restricts movement of the pusher in the direction of the striking axis. Therefore, by holding both the elastic body and the pusher in the holding portion, the auxiliary grip can be made compact.

[0016] According to one or more embodiments, a cushion member and a clearance are provided between the base and the grip body. After the grip body is displaced against the elastic force of the elastic body to eliminate the clearance, the cushion member is pushed and elastically deformed by the displacement of the grip body. Therefore, impact on the base caused by the tilting movement of the grip body is suppressed.

[0017] According to one or more embodiments, the cushion member is always pressed and deformed between the grip body and the base in a direction perpendicular to the striking axis, thereby suppressing rattle of the grip body and stabilizing the grip feel of the grip body.

[0018] According to one or more embodiments, one of the two members, the base and the grip body, is provided with a restricting portion that restricts the amount of tilt of the grip body relative to the base. The other of the two members has a receiving portion against which the restricting portion abuts. The restricting portion makes surface contact with the receiving portion. Therefore, the maximum tilt angle of the grip body relative to the base is reliably restricted. [Example]

[0019] As shown in FIG. 1, the auxiliary grip 1 is attached to an impact tool 50 known as a hammer drill. The impact tool 50 is a relatively large, hand-held tool that includes a tool body 51 incorporating an impact mechanism 60 and a loop-shaped handle 52 that is held by the operator. Multiple vibration-damping mechanisms 53 are interposed between the tool body 51 and the handle 52, providing a vibration-damping structure in which the two are elastically supported rather than rigidly connected. The vibration-damping mechanisms 53 are primarily comprised of compression coil springs and function to absorb impacts generated on the impact mechanism 60 side of the tool body 51 and suppress their transmission to the handle 52 side.

[0020] The tool body 51 has a body housing 54. The body housing 54 houses an impact mechanism 60. The impact mechanism 60 has an electric motor 61 as a drive source. The electric motor 61 is supported in a rearward tilted position with the motor axis M inclined in a direction in which the upper side is displaced rearward. The rotational output of the electric motor 61 is transmitted to an intermediate shaft 63 via a bevel gear 62. The intermediate shaft 63 is supported in a horizontal position with the axis J positioned parallel to the front and rear directions so as to be rotatable about the axis J.

[0021] Rotation of the intermediate shaft 63 causes the power conversion member 64 to tilt back and forth. The power conversion member 64 is connected to a piston 65. Therefore, rotation of the intermediate shaft 63 causes the piston 65 to reciprocate back and forth. Air pressure generated by the reciprocating movement of the piston 65 causes the striker 66 to move forward and come into contact with the intermediate element 68. The intermediate element 68 strikes the rear end of the drill bit B. The striking force of the intermediate element 68 strikes the drill bit B toward the workpiece W (e.g., a concrete wall surface). In this embodiment, the axis of the drill bit B corresponds to the striking axis P. The drill bit B is struck forward in the direction of the striking axis P.

[0022] A gear portion 63a is provided at the front portion of the intermediate shaft 63. A holder gear 67a is engaged with the gear portion 63a. The holder gear 67a is connected to the outer periphery of the tool holder 67. As a result, rotation of the intermediate shaft 63 causes the tool holder 67 to rotate about the striking axis P. The rear side of the tool holder 67 is cylindrical. A piston 65 and a striker 66 are housed inside the tool holder 67 so that they can move back and forth. A drill bit B is detachably attached to the front side of the tool holder 67. The drill bit B protrudes forward from a chuck 55 provided at the front of the main housing 54. The rotational output of the electric motor 61 causes the drill bit B attached to the tool holder 67 to rotate about the striking axis P and strike in the direction of the striking axis P.

[0023] The handle portion 52 has a loop shape that spans between the upper and lower rear portions of the tool body 51. The handle portion 52 includes a grip portion 56 that is actually held by the operator, and a base portion 57. The front portion of the base portion 57 is connected to the lower rear portion of the tool body 51 via a vibration-damping mechanism 53. The grip portion 56 extends upward from the rear portion of the base portion 57. The upper portion of the grip portion 56 is connected to the upper rear portion of the tool body 51 via the vibration-damping mechanism 53.

[0024] A switch lever 58 is provided on the front surface (inside the loop) of the grip portion 56. A switch main body 59 is provided behind the switch lever 58. When the switch lever 58 is pulled rearward with the fingertips of the hand (for example, the right hand) holding the grip portion 56, the switch main body 59 is turned on and the electric motor 61 is started.

[0025] A battery mounting portion 71 for mounting one battery pack 70 is provided on the underside of the base portion 57. The battery pack 70 is a rectangular parallelepiped, slide-mounted lithium-ion battery that is mounted by sliding it forward onto the battery mounting portion 71. The electric motor 61 is started using the power from the mounted battery pack 70 as a power source. A rectangular, flat-plate-shaped controller 72 is mounted inside the base portion 57. The operation of the electric motor 61 is mainly controlled by the controller 72.

[0026] The worker is positioned behind the impact tool 50 and holds the impact tool 50 by grasping the grip portion 56 of the handle portion 52 with one hand (for example, the right hand) and the auxiliary grip 1 with the other hand (for example, the left hand). This allows the drill bit B to be directed toward, for example, a concrete wall surface (workpiece W) in front (or below). In this specification, the front, back, left, right, up and down directions of members and components are used relative to the worker. Therefore, the front side as seen from the worker's perspective is the rear side.

[0027] The auxiliary grip 1 is attached to a cylindrical grip attachment portion 54a provided at the front of the main body housing 54. The auxiliary grip 1 attached to the grip attachment portion 54a extends in a direction intersecting with the striking axis P.

[0028] The extension direction of the auxiliary grip 1 can be changed to any position around the striking axis P by loosening the fixation to the grip attachment portion 54a. The auxiliary grip 1 can be used in a vertical position extending downward from the grip attachment portion 54a as shown by the solid line in FIG. 1, or in a horizontal position extending to the left (perpendicular to the plane of the page) as shown by the two-dot chain line in FIG. 1. In many cases, the auxiliary grip 1 is fixed and used in the latter horizontal position, particularly in the left-side horizontal position where it protrudes almost horizontally to the left as seen by the operator.

[0029] 2 to 11 show the auxiliary grip 1 removed from the grip attachment portion 54a. The removed auxiliary grip 1 is used in the front, back, left, right, up, and down directions based on the left lateral position protruding to the left. Note that the attachment position of the auxiliary grip 1 can be changed from the left lateral position to a right lateral position protruding to the right by removing it from the grip attachment portion 54a. FIG. 12 shows the auxiliary grip 1 attached in the right lateral position protruding to the right. The components and parts are reversed front to back between the left lateral position and the right lateral position. In the right lateral position, the operator can use the impact tool 50 by holding the grip portion 56 of the impact tool 50 with his left hand and the auxiliary grip 1 with his right hand. The case of attaching the auxiliary grip 1 to the right lateral position will be described later.

[0030] As shown in FIGS. 2 to 5, the auxiliary grip 1 has a base 10 and a grip body 40. The base 10 extends from the grip mounting portion 54a so as to protrude substantially horizontally to the left. The base 10 has a base portion 11 attached to the grip mounting portion 54a and a tip portion 30 to which the grip body 40 is connected so as to be tiltable in the direction of the striking axis P. The base portion 11 has an annular fastening portion 11a. The fastening portion 11a is deformed in a radially reducing direction by tightening a fixing screw 13. The base 10 is fixed to the grip mounting portion 54a by positioning the grip mounting portion 54a on the inner periphery of the fastening portion 11a and tightening the fixing screw 13. A plurality of engaging protrusions 11c are provided on the inner periphery of the fastening portion 11a. The plurality of engaging protrusions 11c fit into the engaging recesses 54b on the grip mounting portion 54a, thereby fixing the position of the auxiliary grip 1 around the striking axis P.

[0031] A thumb screw with a knob 13a at the head is used for the fixing screw 13. The worker can loosen or tighten the fastening portion 11a by pinching the knob 13a and turning the fixing screw 13 without using any special tools.

[0032] Loosening the fixing screw 13 causes the fastening portion 11a to elastically deform in the radially expanding direction. This loosens the fastening state of the fastening portion 11a relative to the grip mounting portion 54a, allowing the auxiliary grip 1 to be moved forward from the grip mounting portion 54a and removed from the impact tool 50. Furthermore, loosening the fastening state of the fastening portion 11a relative to the grip mounting portion 54a allows the position of the auxiliary grip 1 about the impact axis P to be changed. After the position is changed, the fixing screw 13 is tightened so that the engaging protrusion 11c fits into the engaging recess 54b of the grip mounting portion 54a, thereby fixing the position of the auxiliary grip 1 about the impact axis P. This allows the auxiliary grip 1 to be arbitrarily changed to a vertical position (the position shown by the solid line in FIG. 1 ) extending downward from the grip mounting portion 54a, or a horizontal position extending leftward or rightward. As described above, this embodiment describes the state in which the auxiliary grip 1 is fixed in the horizontal position extending leftward.

[0033] A hexagonal hole-shaped auxiliary tool mounting part 14 is provided on the upper part of the fastening part 11a. A long rod-shaped stopper bar (not shown) for regulating the drilling depth (hole depth) of the drill bit B is attached to the auxiliary tool mounting part 14 in parallel with the drill bit B, for example. By cutting the drill bit B until the stopper bar hits the concrete wall surface of the workpiece W, it is possible to drill holes of a constant depth in multiple locations. A lock button 15 is provided on the right side of the auxiliary tool mounting part 14. Pressing the lock button 15 to the left loosens the fixation of the auxiliary tool to the auxiliary tool mounting part 14. This allows the forward / backward position of the auxiliary tool to be adjusted and also allows it to be removed from the auxiliary tool mounting part 14.

[0034] An oval flange portion 16 is integrally provided on the left side of the fixing screw 13. As shown in Figures 5, 6, and 7, a shock absorbing portion 20 is provided on the left side of the flange portion 16. A tip portion 30 extends leftward from the left side of the shock absorbing portion 20. A cushion member 35 is attached to a portion near the base of the tip portion 30, adjacent to the shock absorbing portion 20. Details of the shock absorbing portion 20 and the cushion member 35 will be described later.

[0035] As shown in Fig. 5, the shock absorbing part 20, cushion member 35, and tip part 30 are all housed inside the grip body 40 in an area to the left of the flange part 16. The grip body 40 has a cylindrical shape that covers the periphery of the tip part 30. The grip body 40 is connected to the tip part 30 via a connecting part 31 at its left end.

[0036] As shown in Figures 5 and 6, a support shaft 30a of a constant width is provided at the top and bottom of the left end of the tip portion 30. As shown in Figure 10, a support hole 40a of a constant width is provided at the top and bottom of the left end of the grip body 40. A single connecting shaft 32 is provided between the top and bottom surfaces of the support hole 40a. The support shaft 30a is inserted into the support hole 40a, so that the tip portion 30 and the grip body 40 are connected at the connecting portion 31.

[0037] A connecting shaft 32 is inserted into the support shaft portion 30a at the connecting portion 31. The grip body 40 is connected to the base 10 so as to be tiltable in the front-to-rear direction (the direction of the impact axis P) around the connecting shaft 32. Both upper and lower ends of the connecting shaft 32 are supported by caps 33. The upper and lower caps 33 are elastically fitted and fixed in recesses provided on the upper and lower surfaces of the grip body 40, respectively.

[0038] An opening 40b that opens in a curved shape and expands in diameter to the side is provided at the right end of the grip body 40. The opening 40b is almost completely closed by the flange portion 16 of the base 10. The opening 40b that expands in diameter to the side restricts the upper end of the grip portion, improving the gripping ability of the auxiliary grip 1.

[0039] As shown in Figures 5 to 8, the shock absorbing part 20 and cushion member 35 are housed on the inner circumferential side of the opening 40b. The shock absorbing part 20 has two elastic bodies 21, 22 and four pushers 23, 24, 25, 26. Two upper and lower holding parts 17, 18 are integrally formed on the left side surface of the flange part 16. The upper and lower holding parts 17, 18 each have a rectangular recess shape. The upper and lower holding parts 17, 18 are arranged symmetrically above and below. The upper holding part 17 opens upward. The lower holding part 18 opens downward.

[0040] One elastic body 21, 22 is housed in each of the upper and lower holding portions 17, 18. The two elastic bodies 21, 22 are housed with their biasing direction aligned with the direction of the impact axis P (front-to-back direction). Compression coil springs are used for the two elastic bodies 21, 22. The four pushers 23, 24, 25, 26 have the same axial size. Front flanges 23a, 24a, 25a, 26a are provided at the front ends of the four pushers 23, 24, 25, 26, respectively. Rear flanges 23b, 24b, 25b, 26b are provided at the rear ends of the four pushers 23, 24, 25, 26, respectively.

[0041] The rear flange 23b of the front pusher 23 abuts against the front portion 21a of the upper (first side) elastic body 21 (first elastic body). The front flange 24a of the rear pusher 24 abuts against the rear portion 21b of the upper elastic body 21. The rear flange 25b of the front pusher 25 abuts against the front portion 22a of the lower (second side) elastic body 22 (second elastic body). The front flange 26a of the rear pusher 26 abuts against the rear portion 22b of the lower elastic body 22. By arranging the elastic bodies 21, 22 on both the first side and the second side of the base 10, twisting (pinch) of the elastic bodies 21, 22 is suppressed, stabilizing the gripping ability of the grip main body 40. By arranging the first side elastic body 21 and the second side elastic body 22 so that they overlap vertically, the impact absorbing unit 20 is made compact in the direction of the impact axis P.

[0042] Claw portions 23c, 24c, 25c, and 26c that engage with the inner peripheries of the elastic bodies 21 and 22 are provided on the rear flange 23b, the front flange 24a, the rear flange 25b, and the front flange 26a that come into contact with the elastic bodies 21 and 22, respectively. The elastic body 21 is held between the front pusher 23 and the rear pusher 24 by the claw portion 23c engaging with the front portion 21a of the elastic body 21 and the claw portion 24c engaging with the rear portion 21b of the elastic body 21. The elastic body 22 is held between the front pusher 25 and the rear pusher 26 by the claw portion 25c engaging with the front portion 22a of the elastic body 22 and the claw portion 26c engaging with the rear portion 22b of the elastic body 22.

[0043] The upper front pusher 23 is held in a holding groove 17b provided in the front wall 17a of the holding portion 17. The upper rear pusher 24 is held in a holding groove 17d provided in the rear wall 17c of the holding portion 17. The lower front pusher 25 is held in a holding groove 18b provided in the front wall 18a of the holding portion 18. The lower rear pusher 26 is held in a holding groove 18d provided in the rear wall 18c of the holding portion 18. The upper front pusher 23 and rear pusher 24, and the lower front pusher 25 and rear pusher 26 are held in the holding grooves 17b, 17d, 18b, 18d, respectively, in a state where they can be displaced in the axial direction (front-rear direction).

[0044] The front flanges 23a, 24a, 25a, and 26a and the rear flanges 23b, 24b, 25b, and 26b of the four pushers 23, 24, 25, and 26 all have diameters that prevent them from passing through the retaining grooves 17b, 17d, 18b, and 18d, thereby restricting the front pushers 23 and 25 from moving forward and the rear pushers 24 and 26 from moving backward.

[0045] In an initial state in which the grip body 40 is not subjected to a load in the direction of the impact axis P, the grip body 40 is located in a neutral position (initial position) parallel to the tip portion 30, as shown in FIG. 5. In the initial state shown in FIGS. 5 to 8, the rear flange 23b of the front pusher 23 is pressed against the rear surface of the front wall 17a by the biasing force of the upper elastic body 21, and the front flange 24a of the rear pusher 24 is pressed against the front surface of the rear wall 17c. Also, in the initial state, the rear flange 25b of the front pusher 25 is pressed against the rear surface of the front wall 18a by the biasing force of the lower elastic body 22, and the front flange 26a of the rear pusher 26 is pressed against the front surface of the rear wall 18c. In this way, the elastic bodies 21, 22 are assembled between the front pusher 23 and the rear pusher 24, and between the front pusher 25 and the rear pusher 26, respectively, in a biased state in which they are compressed to be shorter than their free lengths during assembly.

[0046] 5 and 9, four abutment surfaces 41 to 44 are provided on the inner periphery of the opening 40b of the grip body 40. In the initial state, the front flange 23a of the upper front pusher 23 faces the upper front abutment surface 41 with a small clearance therebetween, and the rear flange 24b of the upper rear pusher 24 faces the rear abutment surface 42 with a small clearance therebetween. In the initial state, the front flange 25a of the lower front pusher 25 faces the lower front abutment surface 43 with a small clearance therebetween, and the rear flange 26b of the lower rear pusher 26 faces the lower rear abutment surface 44 with a small clearance therebetween.

[0047] Therefore, in the initial state, neither the biasing force of the upper elastic body 21 nor the biasing force of the lower elastic body 22 acts on the grip main body 40 .

[0048] The distance d1 between the front abutment surface 41 and the front wall 17a of the holding portion 17, the distance d2 between the rear abutment surface 42 and the rear wall 17c of the holding portion 17, the distance d3 between the front abutment surface 43 and the front wall 18a of the holding portion 18, and the distance d4 between the rear abutment surface 44 and the rear wall 18c of the holding portion 18 change due to the tilting movement of the gripping body 40 around the connecting axis 32.

[0049] The distance D1 between the front contact surface 41 and the rear contact surface 42 and the distance D2 between the front contact surface 43 and the rear contact surface 44 are each constant and do not change with the tilting operation of the grip body 40. In the initial state, the distance D1 between the upper front contact surface 41 and the rear contact surface 42 is set to be slightly larger than the distance between the front flange 23a of the front pusher 23 and the rear flange 24b of the rear pusher 24. As a result, in the initial state, as described above, a slight clearance is provided between the front contact surface 41 and the front flange 23a of the front pusher 23, and between the rear contact surface 42 and the rear flange 24b of the rear pusher 24.

[0050] Furthermore, the distance D2 between the lower front contact surface 43 and the rear contact surface 44 is set to be slightly larger than the distance between the front flange 25a of the front pusher 25 and the rear flange 26b of the rear pusher 26 in the initial state. As a result, as described above, in the initial state, a slight clearance is provided between the front contact surface 43 and the front flange 25a of the front pusher 25, and between the rear contact surface 44 and the rear flange 26b of the rear pusher 26. The distances D1 and D2 are set to, for example, about 42 millimeters. This reduces the size of the impact absorbing part 20 in the direction of the impact axis P (the longitudinal direction of the tool body 50) and the opening 40b of the grip body 40.

[0051] As described above, the front pusher 23 and the rear pusher 24 are held in the holding portion 17 by the biasing force of the elastic body 21, and the front pusher 25 and the rear pusher 26 are held in the holding portion 18 by the biasing force of the elastic body 22. As a result, in the process of assembling the grip body 40 to the base 10, the shock absorbing portion 20 can be inserted into the inner peripheral side of the grip body 40 with the four pushers 23, 24, 25, and 26 held by the elastic bodies 21 and 22. This ensures good assembly properties of the grip body 40.

[0052] For example, during actual work, an operator presses the bit B of the impact tool 50 against the surface of a concrete wall, which is the workpiece W. This causes the auxiliary grip 1 held by the operator to be pushed forward in the direction of the impact axis P. As a result, as shown in FIG. 11 , the grip body 40 tilts forward in the direction of the impact axis P (forward) relative to the base 10 around the connecting shaft 32. When the grip body 40 tilts forward, the rear pushers 24, 26 are pushed forward by the rear abutment surfaces 42, 44, displacing them forward relative to the holding portions 17, 18. This reduces the distances d2, d4. At this time, the front pushers 23, 25 do not displace relative to the holding portions 17, 18. This compresses the elastic bodies 21, 22 by the amount of displacement of the rear pushers 24, 26, and a rearward biasing force acts on the grip body 40 in the direction of the impact axis P. At this time, the front contact surfaces 41, 43 move away from the front pushers 23, 25 (the distances d1, d3 become larger), so that no force acts on the elastic bodies 21, 22 from the grip body 40 in the direction of the striking axis P.

[0053] When the grip body 40 tilts forward, the upper and lower rear pushers 24, 26 in the impact absorbing section 20 are pushed forward by the rear abutment surfaces 42, 44 on the grip body 40 side. The rear flanges 23b, 25b of the upper and lower front pushers 23, 25 are restricted from moving forward because they abut against the rear surfaces of the front walls 17a, 18a, respectively. This restricts the forward displacement of the elastic bodies 21, 22, and the biasing force of the elastic bodies 21, 22 is received by the base 10 side via the front pushers 23, 25.

[0054] The rear pushers 24, 26 function as members that push the rear portions 21b, 22b of the elastic bodies 21, 22 forward, and the front pushers 23, 25 function as members that restrict the forward displacement of the front portions 21a, 22a of the elastic bodies 21, 22.

[0055] A pressing force from the operator toward the front side (toward the workpiece W) in the direction of the striking axis P is constantly acting on the grip body 40. As a result, the rear pushers 24, 26 are pushed forward against the urging forces of the elastic bodies 21, 22, respectively, so that a urging force acts on the grip body 40 toward the rear side in the direction of the striking axis P. By constantly applying the urging forces of the elastic bodies 21, 22 to the grip body 40, the impact generated by the striking operation of the tool body 51 is absorbed.

[0056] When the operator releases the forward pushing operation of the grip body 40, the grip body 40 is returned to the initial position shown in Fig. 5 by the biasing force of the elastic bodies 21, 22. In the initial position, the biasing force of the elastic bodies 21, 22 restricts the movement of the front pushers 23, 25 and the rear pushers 24, 26, thereby restricting the tilting of the grip body 40 in the front-to-rear direction. As a result, the grip body 40 is held in a neutral position parallel to the tip end portion 30.

[0057] One cushion member 35 is attached adjacent to the left side of the shock absorbing section 20. The cushion member 35 has a circular ring shape. The cushion member 35 is attached along a cushion groove 30b provided at the base of the tip section 30. As shown in FIG. 7, the depth of the cushion groove 30b is deep in the front-to-rear direction and shallower in the up-to-down direction. Therefore, the cushion member 35 is attached in a deformed oval shape that is stretched in the up-to-down direction. Therefore, the cushion member 35 is attached so that the front-to-back width is smaller than the up-to-down width.

[0058] 9, upper and lower flat surfaces 40c, 40d are provided on the inner peripheral surface of grip body 40. Upper and lower flat surfaces 40c, 40d elastically abut against the upper and lower parts of cushion member 35, which is stretched in the vertical direction. Therefore, cushion member 35 is assembled to grip body 40 in a state where it is always elastically pressed vertically. Cushion member 35 is attached to the inner peripheral surface of grip body 40 with clearance 35a opened in the front-to-rear direction.

[0059] As described above, the operator constantly applies a pressing force to the grip body 40 in the forward direction of the impact axis P, causing the elastic bodies 21, 22 to elastically deform, thereby absorbing the impact in the direction of the impact axis P that is generated by the impact operation. Because clearances 35a are provided between the front and rear parts of the cushion member 35 and the inner peripheral surface of the grip body 40, when the elastic bodies 21, 22 begin to elastically deform and tilt in the direction of the impact axis P, the clearances 35a on either the front or rear sides disappear, and the cushion member 35 comes into contact with the inner peripheral surface of the grip body 40.

[0060] The cushion member 35 abuts against the inner circumferential surface of the grip body 40, thereby suppressing the momentum of the tilting movement of the grip body 40. This reduces the impact when the grip body 40 abuts against the base 10.

[0061] 8 and 9, a front regulating portion 40e and a rear regulating portion 40f are provided on the inner surface of the opening 40b of the grip body 40. The front regulating portion 40e and the rear regulating portion 40f are arranged facing each other in the front-rear direction. Both the front regulating portion 40e and the rear regulating portion 40f have flat surfaces, but are provided at a slight angle inclined with respect to the extension direction (left-right direction) of the base 10. Therefore, the front regulating portion 40e and the rear regulating portion 40f are inclined in a direction (forward or rearward) that moves away from each other toward the right.

[0062] On the other hand, two front receiving portions 27 and two rear receiving portions 28 are provided on the left side surface of the flange portion 16. The two front receiving portions 27 are each flat and arranged parallel to one another. The front receiving portion 27 protrudes forward from the tip portion 30. The two rear receiving portions 28 are each flat and protrude rearward from the tip portion 30.

[0063] 11, when the operator grasps the auxiliary grip 1 and presses it forward in the direction of the impact axis P, causing the grip body 40 to tilt relatively forward, the rear restricting portion 40f comes into contact with the rear receiving portion 28. Because the rear receiving portion 28 is slightly inclined with respect to the extension direction of the base 10, it comes into face contact with the rear restricting portion 40f. This restricts the range of forward tilting of the grip body 40.

[0064] As described above, as the grip body 40 tilts forward in the direction of the impact axis P, the elastic bodies 21, 22 are pushed forward by the rear pushers 24, 26 and put into an elastically deformed state, thereby absorbing the impact caused by the impact action of the tool body 51. Before the elastic bodies 21, 22 reach their maximum elastic deformation and are crushed, the rear restricting portion 40f abuts against the rear receiving portion 28. This allows the impact on the grip body 40 to be efficiently absorbed within the elastic range of the elastic bodies 21, 22.

[0065] The right end 40g of the opening 40b of the grip body 40 is formed in a curved shape. The front and rear end sides of the right end 40g are curved in a direction away from the flange portion 16. The right end 40g faces the flange portion 16 of the base 10. Therefore, the curved shape of the right end 40g prevents the right end 40g from coming into contact with the flange portion 16 when the grip body 40 is tilted in the front-rear direction. This allows the grip body 40 to tilt at a sufficient angle.

[0066] As shown in Fig. 12, the auxiliary grip 1 can be attached in a right-side lateral position protruding to the right from the tool body 51. The auxiliary grip 1 can be temporarily removed from the grip attachment portion 54a of the tool body 51, and then flipped 180° to the right in plan view from the left-side lateral position shown in Fig. 11, and attached in the right-side lateral position shown in Fig. 12. The auxiliary grip 1 in the right-side lateral position is held, for example, by the right hand of the operator.

[0067] In the right lateral position and the left lateral position, which are rotated 180° in the left-right direction perpendicular to the striking axis P, the front pushers 23, 25 and the rear pushers 24, 26 are positioned in an inverted front-to-rear direction. Therefore, in the right lateral position, the front pushers 23, 25 are positioned rearward of the rear pushers 24, 26. Also, in the right lateral position, the front flanges 23a, 25a of the front pushers 23, 25 positioned on the rear side are positioned rearward of the rear flanges 23b, 25b, and the front flanges 24a, 26a of the rear pushers 24, 26 positioned on the front side are positioned rearward of the rear flanges 24b, 26b.

[0068] In the right-side lateral position, the elastic bodies 21 and 22 are inverted front to back, so that the front portions 21 a and 22 a are positioned behind the rear portions 21 b and 22 b. In the right-side lateral position, the grip body 40 is inverted front to back, so that the front contact surfaces 41 and 43 are positioned behind the rear contact surfaces 42 and 44.

[0069] When the auxiliary grip 1 in the right-side lateral position is pushed forward in the direction of the impact axis P (toward the workpiece W), the grip body 40 tilts forward in the direction of the impact axis P relative to the base 10 around the connecting shaft 32. When the grip body 40 tilts forward, the front restriction portion 40e abuts against the front receiving portion 27. Because the front receiving portion 27 is slightly inclined with respect to the extension direction of the base 10, it comes into face-to-face contact with the front restriction portion 40e. This restricts the range of tilting of the grip body 40 forward.

[0070] When the grip body 40 is tilted forward, the front pushers 23, 25 are pushed forward by the front contact surfaces 41, 43, and are displaced forward relative to the holding portions 17, 18. As a result, the distances d1, d3 become smaller. At this time, the rear pushers 24, 26 are not displaced relative to the holding portions 17, 18. As a result, the elastic bodies 21, 22 are compressed by the amount of displacement of the front pushers 23, 25, and a rearward biasing force in the direction of the striking axis P acts on the grip body 40. Furthermore, at this time, the rear contact surfaces 42, 44 move away from the rear pushers 24, 26 (the distances d2, d4 become larger), and therefore no force from the grip body 40 acts on the elastic bodies 21, 22 in the direction of the striking axis P.

[0071] When the grip body 40 tilts forward, the upper and lower front pushers 23, 25 in the impact absorbing section 20 are pushed forward by the front abutment surfaces 41, 43 on the grip body 40 side. The front flanges 24a, 26a of the upper and lower rear pushers 24, 26 abut against the rear walls 17c, 18c of the holding sections 17, 18, respectively, restricting their forward movement. This restricts the forward displacement of the elastic bodies 21, 22, and the biasing force of the elastic bodies 21, 22 is received by the base 10 side via the front pushers 23, 25.

[0072] The front pushers 23, 25 function as members that push the front portions 21a, 22a of the elastic bodies 21, 22 forward, and the rear pushers 24, 26 function as members that restrict the forward displacement of the rear portions 21b, 22b of the elastic bodies 21, 22.

[0073] A pressing force from the operator toward the front side (toward the workpiece W) in the direction of the striking axis P is constantly acting on the grip body 40. As a result, the front pushers 23, 25 are pushed forward against the urging forces of the elastic bodies 21, 22, respectively, so that a rearward urging force in the direction of the striking axis P acts on the grip body 40. By constantly applying the urging forces of the elastic bodies 21, 22 to the grip body 40, the impact generated by the striking operation of the tool body 51 is absorbed.

[0074] When the operator releases the forward pushing operation of the grip body 40, the grip body 40 is returned to the initial position by the biasing force of the elastic bodies 21, 22. In the initial position, the biasing force of the elastic bodies 21, 22 restricts the movement of the front pushers 23, 25 and the rear pushers 24, 26, thereby restricting the tilting of the grip body 40 in the front-to-rear direction. As a result, the grip body 40 is held in a neutral position parallel to the tip end portion 30.

[0075] In this way, in the right-side lateral posture, as the grip body 40 tilts forward in the direction of the impact axis P, the elastic bodies 21, 22 are pushed forward by the front pushers 23, 25 and put into an elastically deformed state, thereby absorbing the impact caused by the impact action of the tool body 51. Before the elastic bodies 21, 22 reach their maximum elastic deformation and are crushed, the front restricting portion 40e abuts against the front receiving portion 27. As a result, the impact on the grip body 40 is efficiently absorbed within the elastic range of the elastic bodies 21, 22.

[0076] The elastic bodies 21 and 22 are used as a common elastic body that urges the grip body 40 rearward (toward the worker) in the direction of the striking axis P in both the left lateral position and the right lateral position. The elastic bodies 21 and 22 function as elastic bodies that urge the grip body 40 toward the worker in either position. Therefore, in either position, the worker pushes the grip body 40 forward in the direction of the striking axis P against the urging force of the elastic bodies 21 and 22.

[0077] In this embodiment, in order to make the elastic members 21, 22 common to both the left side lateral position and the right side lateral position, the retaining portions 17, 18, the front pushers 23, 25 and the rear pushers 24, 26, the front abutment surfaces 41, 43 and the rear abutment surfaces 42, 44, the front receiving portion 27 and the rear receiving portion 28, and the front regulating portion 40e and the rear regulating portion 40f are each arranged symmetrically in the front-to-back direction in the impact absorbing portion 20.

[0078] According to the embodiment, the auxiliary grip 1 has a base 10 that extends intersecting the direction of the impact axis P of the impact tool 50, and a grip body 40 that covers the base 10. A common elastic body 21 (or 22) held by the base 10 biases the grip body 40 in both one and the other directions of the impact axis P. In both the left lateral position in which the grip body 40 extends to the left with respect to the impact axis P and the right lateral position in which the grip body 40 extends to the right, the grip body 40 is biased toward the operator by the elastic bodies 21, 22. In other words, the grip body 40 is biased in both one and the other directions of the impact axis P.

[0079] Therefore, the grip body 40 is biased in both directions of the striking axis P by the common elastic body 21 (or 22), thereby making the auxiliary grip compact.

[0080] According to the embodiment, the base 10 has a base portion 11 attached to the tool body 51 of the impact tool 50, and a tip portion 30 to which the grip body 40 is connected so as to be tiltable in the direction of the impact axis P. Elastic bodies 21, 22 are arranged on the base portion 11, and a connecting portion 31 to which the grip body 40 is connected is provided at an end of the tip portion 30 spaced apart from the elastic bodies 21, 22. Therefore, by arranging the elastic bodies 21, 22 in a position close to the tool body 51 and arranging the connecting portion 31 in a position far from the tool body 51, the impact caused by the impact operation of the tool body 51 is efficiently absorbed.

[0081] According to the embodiment, the elastic bodies 21 and 22 are arranged offset from the base 10 in the vertical direction intersecting the extension direction of the base 10, and are arranged so that at least a portion of the elastic bodies 21 and 22 overlap with the base 10 in the vertical direction. Therefore, compactness of the auxiliary grip in the direction of the striking axis P is ensured.

[0082] According to the embodiment, the shock absorbing part 20 includes an elastic body 21 (first elastic body) arranged on the upper side (first side) of the base 10, and an elastic body 22 (second elastic body) arranged on the lower side (second side) opposite to the first side of the base 10. Therefore, by arranging the elastic bodies 21, 22 on both the upper and lower sides of the base 10, twisting (pinch) of the elastic bodies 21, 22 is suppressed, and the gripping ability of the grip body 40 is stabilized.

[0083] According to the embodiment, the elastic bodies 21, 22 are held by the holding portions 17, 18 by the biasing force of the elastic bodies 21, 22. Therefore, it is possible to prevent the elastic bodies 21, 22 from falling off the holding portions 17, 18 during assembly. This improves the ease of assembly of the grip body 40 to the base 10. Also, since the initial reaction force of the elastic bodies 21, 22 is increased, the worker feels a better grip when holding the auxiliary grip 1.

[0084] According to the embodiment, the shock absorbing part 20 has pushers 23, 24, 25, and 26, one end of which abuts against the elastic bodies 21 and 22 and the other end of which abuts against the inner surface of the grip body 40. Therefore, the biasing force of the elastic bodies 21 and 22 acts on the inner surface of the grip body 40 via the pushers 23, 24, 25, and 26.

[0085] According to the embodiment, the impact absorbing part 20 includes front pushers 23, 25 that abut against the front portions 21 a, 22 a of the elastic bodies 21, 22, and rear pushers 24, 26 that abut against the rear portions 21 b, 22 b of the elastic bodies 21, 22. Therefore, when the front pushers 23, 25 are displaced rearward against the urging force of the elastic bodies 21, 22, the grip body 40 is urged forward in the direction of the impact axis P, and when the rear pushers 24, 26 are displaced forward against the urging force of the elastic bodies 21, 22, the grip body 40 is urged rearward in the direction of the impact axis P.

[0086] According to the embodiment, the base 10 has holding portions 17 and 18 that hold the elastic bodies 21 and 22 and the pushers 23, 24, 25, and 26. The holding portions 17 and 18 have wall portions 17a, 17c, 18a, and 18c that restrict movement of the pushers 23, 24, 25, and 26 in the direction of the impact axis P. Therefore, by holding the elastic bodies 21 and 22 and the pushers 23, 24, 25, and 26 together in the holding portions 17 and 18, the auxiliary grip 1 can be made compact. Furthermore, by restricting movement of the pushers 23, 24, 25, and 26, the biasing force of the elastic bodies 21 and 22 is reliably applied to the grip main body 40.

[0087] According to the embodiment, cushion member 35 and clearance 35a are provided between base 10 and grip body 40. After grip body 40 is displaced in the front-rear direction against the elastic force of elastic bodies 21 and 22 to eliminate clearance 35a, cushion member 35 is pushed and elastically deformed by the displacement of grip body 40. Therefore, impact on base 10 caused by tilting of grip body 40 is suppressed.

[0088] According to the embodiment, the cushion member 35 is interposed between the grip body 40 and the base 10 in a constantly pressed and deformed state in the vertical direction perpendicular to the direction of the striking axis P. Therefore, rattling of the grip body 40 is suppressed, and the gripping feel of the grip body 40 is stabilized.

[0089] According to the embodiment, the grip body 40 has a restricting portion that restricts the tilt amount of the grip body 40 relative to the base 10. The restricting portion includes a front restricting portion 40e and a rear restricting portion 40f provided on the grip body 40, and a front receiving portion 27 and a rear receiving portion 28 provided on the base 10 and against which the front restricting portion 40e and the rear restricting portion 40f abut. The front restricting portion 40e and the rear restricting portion 40f of the grip body 40 have an inclination angle with respect to the extension direction of the base 10. Therefore, when the grip body 40 tilts forward or backward, the front and rear restricting portions 40e, 40f come into surface contact with the front and rear receiving portions 27, 28, respectively. Therefore, the maximum tilt angle of the grip body 40 relative to the base 10 is reliably restricted.

[0090] The above-described embodiment can be specified by a higher-level concept, for example, as "an auxiliary grip for an impact tool, the auxiliary grip having a base extending across the impact axis of the impact tool and a grip body covering the base, the grip body being selectively attachable to a left lateral position in which it protrudes to the left side with respect to the impact axis and a right lateral position in which it protrudes to the right side, the base holding an elastic body that biases the grip body toward the operator in the direction of the impact axis, the elastic body being common to both the left lateral position and the right lateral position."

[0091] The embodiments can be further modified. For example, although the shock absorbing unit 20 has been illustrated as having two elastic bodies 21 and 22 arranged above and below, it may be modified to have one or more elastic bodies arranged on either the top or bottom side. Alternatively, one elastic body may be arranged at the same height as the tip portion 30 (at a height that passes through the center of the tip portion 30 from front to back).

[0092] Although the configuration in which the front restricting portion 40e and the rear restricting portion 40f of the grip body 40 are inclined with respect to the extension direction of the base 10 has been exemplified, the front receiving portion 27 and the rear receiving portion 28 on the base 10 side may also be inclined. Alternatively, both may be inclined so that their faces come into contact with each other. Furthermore, one or both of the restricting portion on the grip body side and the receiving portion on the base side may be changed to a curved surface instead of a flat inclined surface.

[0093] Although compression coil springs have been exemplified as the elastic bodies 21 and 22, they may be replaced by other elastic bodies such as leaf springs, urethane rubber, or gas dampers.

[0094] Although the example shows a configuration in which the gripping body 40 is connected by the connecting portion 31 at the left end side of the tip portion 30 of the base 10 so that it can tilt back and forth, and the shock absorbing portion 20 including the elastic bodies 21, 22 and the pushers 23, 24, 25, 26 is arranged at the base of the base 10, it is also possible to arrange the shock absorbing portion at the left end side of the tip portion 30 and the tilting connecting portion at the base (a configuration in which the positions of the shock absorbing portion 20 and the connecting portion 31 are swapped).

[0095] Although the configuration in which the grip body 40 is connected to the tip 30 of the base 10 via the connecting shaft 32 has been exemplified, the connecting shaft may be held so as to be slidable (translatable) in the front-rear direction relative to the support shaft portion 30a and / or the support hole 40a of the grip body 40. This more reliably suppresses impacts on the grip body 40.

[0096] As an example of an impact tool, a hammer drill that strikes while rotating the drill bit B has been given, but the auxiliary grip 1 given as an example can also be applied to an impact tool that only strikes the tip tool, such as a hammer tool used for chipping work.

[0097] In the embodiment, the auxiliary grip 1 is detachable from the tool body 51, but the shock absorbing portion 20 can be applied to an auxiliary grip that is integral with the tool body and cannot be detached.

[0098] The impact tool may be a DC machine powered by a rechargeable battery pack 70, or an AC machine powered by a commercial power source. [Explanation of symbols]

[0099] 1...Auxiliary grip 10...Bass 11...Base 11a... fastening portion, 11c... engaging protrusion 13...Fixing screw 13a...Knob 14...Auxiliary equipment attachment part 15...Lock button 16...Flange 17...Holding part (upper side) 17a...front wall, 17b...retaining groove, 17c...rear wall, 17d...retaining groove 18...Holding part (lower side) 18a...front wall, 18b...retaining groove, 18c...rear wall, 18d...retaining groove 20...Shock absorbing part 21...Elastic body (upper side) 21a...front, 21b...rear 22...Elastic body (lower side) 22a...front, 22b...rear 23...Front pusher (upper) 23a...front flange, 23b...rear flange, 23c...claw portion 24...Rear pusher (upper) 24a...Front flange, 24b...Rear flange, 24c...Claw portion 25...Front pusher (lower) 25a...Front flange, 25b...Rear flange, 25c...Claw portion 26...Rear pusher (lower) 26a...front flange, 26b...rear flange, 26c...claw portion 27...Front support part 28...Rear receiving part 30...Tip 30a...support shaft portion, 30b...cushion groove 31...Connection part 32...Connection shaft 33...Cap 35...Cushion member 35a…Clearance 40...Gripping body 40a...support hole, 40b...opening, 40c,40d...flat surface 40e...Front regulation part, 40f...Rear regulation part, 40g...Right end part 41…Front contact surface (upper side) 42...Rear contact surface (upper side) 43…Front contact surface (lower side) 44...Rear contact surface (lower side) 50...Impact tool (hammer drill) 51...Tool body 52...Handle 53... Vibration isolation mechanism 54...Main body housing 54a...grip attachment portion, 54b...engagement recess 55…Chuck 56...Grip section 57...Base 58...Switch lever 59...Switch body 60...Striking mechanism 61...Electric motor M: Motor axis 62...Bevel gear 63...Intermediate shaft 63a...Gear section J...axis of the intermediate shaft 63 64...Power conversion component 65...Piston 66...Striker B: Drill bit P... Impact axis W...Concrete wall surface (workpiece) 67...Tool holder 67a...Holder gear 68...Meson 70...Battery pack 71...Battery mounting section 72...Controller

Claims

1. An auxiliary grip for an impact tool, a base extending in a direction intersecting the striking axis of the striking tool; a grip body covering the base, An auxiliary grip in which the grip body is held on the base in a state in which it can be biased in both directions of the striking axis by a common elastic body held on the base.

2. The auxiliary grip according to claim 1, The base has a base portion attached to the tool body of the impact tool and a tip portion to which the grip body is connected so as to be tiltable in the direction of the impact axis, and the elastic body is disposed at the base, and the auxiliary grip has a connecting portion to which the grip body is connected at the tip portion spaced from the elastic body.

3. The auxiliary grip according to claim 1 or 2, The elastic body is an auxiliary grip that is positioned offset from the base in a vertical direction that intersects with the extension direction of the base, and is positioned so that at least a portion of the elastic body overlaps the base in the vertical direction.

4. The auxiliary grip according to any one of claims 1 to 3, The auxiliary grip includes a first elastic body arranged on a first side of the base and a second elastic body arranged on a second side of the base opposite the first side.

5. The auxiliary grip according to any one of claims 1 to 4, The elastic body is an auxiliary grip that is held by a holding portion provided on the base by the biasing force of the elastic body.

6. The auxiliary grip according to any one of claims 1 to 5, An auxiliary grip having a pusher, one end of which is in contact with the elastic body and the other end of which is in contact with the inner surface of the grip body.

7. The auxiliary grip according to claim 6, The auxiliary grip includes a front pusher that contacts the front portion of the elastic body and a rear pusher that contacts the rear portion of the elastic body.

8. The auxiliary grip according to claim 6 or 7, the base has a holding portion that holds the elastic body and the pusher, The holding portion is an auxiliary grip having a portion that restricts movement of the pusher in the striking axis direction.

9. The auxiliary grip according to any one of claims 1 to 8, An auxiliary grip in which a cushion member and a clearance are provided between the base and the grip body, and after the grip body is displaced to eliminate the clearance against the elastic force of the elastic body, the cushion member is pushed by the displacement of the grip body and elastically deforms.

10. 10. The auxiliary grip according to claim 9, The cushion member is interposed between the grip body and the base in a state where it is constantly pressed and deformed in a direction perpendicular to the striking axis direction.

11. The auxiliary grip according to any one of claims 1 to 10, a restricting portion that restricts the tilt amount of the grip body relative to the base is provided on one of the two members, the base and the grip body; The other of the two members has a receiving portion against which the restricting portion abuts, An auxiliary grip in which the restricting portion makes surface contact with the receiving portion.

12. An impact tool having the auxiliary grip according to any one of claims 1 to 11.

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