Impact tool tip attachment and connection member

Abstract

To provide a pneumatic impact tool tip attachment allowed to efficiently transmit an impact force to a workpiece.SOLUTION: A pneumatic impact tool tip attachment 1 comprises a collision member 20 with which a hammer 13 is to collide, a tip-abutting member 30 that is structured separately from the collision member 20, a plurality of intermediate members 40 that link the collision member 20 and the tip-abutting member 30 together in a series form between the collision member 20 and the tip-abutting member 30, and a connection member 50 that connects adjacent ones of the collision, intermediate and tip-abutting members 20, 30, 40 with each other.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a tip tool for an impact tool that applies an impact to a workpiece, and a connecting member used for the tip tool for the impact tool. [Background technology]

[0002] Conventionally, there has been known a pneumatic impact tool used to apply an impact to a workpiece containing casting sand to vibrate the workpiece and remove the casting sand (see, for example, Patent Document 1). In such a pneumatic impact tool, a hammer that reciprocates within a cylinder part by air drive repeatedly collides with the rear end of the tip tool, and the impact is applied to the workpiece from the tip of the tip tool. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-74749 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned tip tool for an impact tool, the impact force generated by the hammer in the impact tool repeatedly colliding with the tip tool is transmitted to the contacting workpiece, vibrating the workpiece and removing the casting sand. Here, depending on the part of the workpiece that the tip tool contacts to remove the casting sand, it may be necessary to use a very long and heavy tip tool. If a tip tool that is too heavy for the hammer is used in this way, the impact force is attenuated and cannot be transmitted to the workpiece, which is one of the causes of deterioration of work efficiency.

[0005] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a tip for an impact tool that can efficiently transmit impact force to a workpiece.

[0006] Another object of the present invention is to provide a connecting member used in a tip tool for a pneumatic impact tool, which can transmit impact force to a workpiece without attenuation even if it has an excessively large mass compared to a hammer. [Means for solving the problem]

[0007] The present invention relates to an impact tool tip tool that is attached to a tip of an impact tool to apply an impact to a predetermined workpiece, the tip tool comprising a tool body, a hammer that reciprocates within the tool body, and a drive source introduced from outside the tool body to reciprocate the hammer to generate an impact force and apply an impact to a workpiece, the tip tool comprising: a collision member with which the hammer collides, a tip abutment member that is configured separately from the collision member, one or more intermediate members that are arranged in series between the collision member and the tip abutment member, and a connecting member that connects adjacent members of the collision member, the intermediate member, and the tip abutment member.

[0008] In such a configuration, by dividing the tip tool of the impact tool (hereinafter also referred to simply as the tip tool) into the collision member, the intermediate member, and the tip abutment member, the impact force applied from the hammer can be applied to the workpiece without attenuation.

[0009] Also proposed is a configuration in which a cylinder portion is disposed within the tool body, and the hammer reciprocates within the cylinder portion, the hammer reciprocates using compressed air introduced from outside the tool body as the driving source, and the tip abutment member abuts against the workpiece at a position eccentric to the axis of the cylinder portion.

[0010] With this configuration, it is possible to apply an impact to an appropriate portion of a workpiece having a complex shape, thereby removing casting sand adhering to the workpiece.

[0011] Furthermore, a configuration is proposed in which the collision member, the intermediate member, and the tip abutment member each have a mass equal to that of the hammer.

[0012] With this configuration, the impact force generated by the hammer colliding with the collision member can be applied to the workpiece from the tip contact member without waste.

[0013] The present invention relates to a connecting member used with the tip tool of an impact tool, comprising a cylindrical main body having an internal space, the main body having an internal space for accommodating ends of two adjacent members among the collision member, the intermediate member, and the tip abutment member, and comprising a locking member protruding from the outside of the main body into the internal space for locking a member accommodated in the internal space.

[0014] In such a configuration, adjacent ones of the collision member, the intermediate member, and the tip abutment member, which are divided in the impact tool tip tool, can be connected without impeding the transmission of impact force. Effect of the Invention

[0015] The tip tool for an impact tool of the present invention has the excellent effect of efficiently transmitting impact force to a workpiece.

[0016] Furthermore, the connecting member of the present invention has the excellent effect of providing a tip tool for an impact tool that can transmit impact force to a workpiece without attenuation even if it has an excessively large mass compared to a hammer. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is an explanatory diagram of a tip tool for a pneumatic impact tool according to a first embodiment. [Diagram 2] FIG. 2 is a vertical cross-sectional view of the connection member according to the first embodiment. [Diagram 3] FIG. 11 is an explanatory diagram of a tip device for a pneumatic impact tool according to a second embodiment. [Figure 4]FIG. 11 is an explanatory diagram of a tip tool for a pneumatic impact tool according to a third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] The embodiment of the present invention will be described according to the examples. Note that the present invention is not limited to the examples shown below, and the design can be modified as appropriate. For convenience, the front-rear direction (strike direction) is specified in the examples, but the present invention is not limited thereto.

[0019] Example 1 As shown in FIG. 1, a tip tool 1 for a pneumatic impact tool (hereinafter also simply referred to as tip tool 1) is attached to a tool body 11 of a pneumatic impact tool 10.

[0020] The pneumatic impact tool 10 includes a cylinder portion 12 in a tool body 11 and a hammer 13 that reciprocates in the front-rear direction within the cylinder portion 12. The pneumatic impact tool 10 uses compressed air introduced from outside the tool body 11 to reciprocate the hammer 13, causing the hammer 13 to repeatedly collide with the tip tool 1.

[0021] The tip tool 1 includes a collision member 20, a tip abutment member 30, an intermediate member 40, and a connecting member 50, each of which is constructed as a separate body.

[0022] The impact member 20 has a substantially cylindrical shape as a main body, is attached to the tool body 11, and is adapted to receive an impact force when the hammer 13 impacts against the rear end of the impact member 20.

[0023] The tip contact member 30 has a substantially cylindrical shape as a main body and is disposed at a position separated from the collision member 20. The tip contacts the workpiece W to apply an impact force to the workpiece W.

[0024] The intermediate member 40 has a substantially cylindrical shape as a main body, and transmits the impact force applied from the collision member 20 to the tip abutment member 30, and connects the collision member 20 and the tip abutment member 30 in series between the collision member 20 and the tip abutment member 30. Although a plurality of intermediate members 40 are provided in this embodiment, a single intermediate member may be used.

[0025] The impact member 20, the tip abutment member 30, and the intermediate member 40 each have the same mass as the hammer 13. In other words, the tip tool 1 is a long rod-like member that is divided in series from the rear end to the tip end so that each member has the same mass as the hammer.

[0026] In addition, on the outer circumferential surfaces of the front and rear ends of the collision member 20, the tip abutment member 30, and the intermediate member 40 that are adjacent to each other, a locking groove portion 41 that is long in the front-to-rear direction is formed as a concave locking portion (see Figure 2).

[0027] Furthermore, among the collision member 20, the tip abutment member 30, and the intermediate member 40, the front end portion and the rear end portion adjacent to each other have a rounded, outwardly convex spherical shape.

[0028] As shown in FIG. 2, the connecting member 50 connects adjacent members among the collision member 20, the tip abutment member 30, and the intermediate member 40 in the tip tool 1.

[0029] More specifically, the connection member 50 has a cylindrical main body 51 having an internal space S. The internal space S accommodates the ends of two adjacent members among the collision member 20, the tip abutment member 30, and the intermediate member 40. Furthermore, a locking member insertion hole 52 is formed in the main body 51 so as to communicate the internal space S with the outside, and a locking screw 55 as a locking member is inserted into the locking member insertion hole 52. The locking screw 55 protrudes into the internal space S and locks into a locking groove 41 formed in the end of the collision member 20, the tip abutment member 30, or the intermediate member 40 arranged in the internal space S. This makes the collision member 20, the tip abutment member 30, or the intermediate member 40 arranged in the internal space S unable to be removed, and is allowed to move slightly forward and backward by the length of the locking groove 41. In other words, with the locking screw 55 as a reference, the front and rear end faces of the locking groove portion 41 as a concave locking portion act as regulating surfaces, allowing the collision member 20, the tip abutment member 30, or the intermediate member 40 to move back and forth within a limited range.

[0030] In such a tip tool 1, the impact force applied from the hammer 13 is transmitted in sequence from the collision member 20 through the intermediate member 40 to the tip abutment member 30, and finally the tip abutment member 30 alone collides with the workpiece W. This suppresses attenuation of the impact force, and the impact force applied from the hammer 13 can be applied directly to the workpiece W.

[0031] Furthermore, in transmitting the impact force in the tip tool 1, the ends of the adjacent members among the collision member 20, the tip abutment member 30, and the intermediate member 40 are formed into a convex spherical portion shape, and the impact force is transmitted at a point rather than a surface, making it difficult for attenuation of the impact force to occur.

[0032] As described above, the tip tool 1 can apply impact force to the workpiece W without waste, so that loss of air, which is the power source of the pneumatic impact tool 10, and reduction in efficiency can be suppressed, thereby achieving high efficiency.

[0033] Example 2 As shown in FIG. 3, the tip tool 2 for a pneumatic impact tool uses a tip abutment member 60 instead of the tip abutment member 30 in the first embodiment.

[0034] The tip of the tip abutment member 60 that abuts against the workpiece W extends in a direction perpendicular to the axial line α of the cylinder section 12 and has a substantially T-shape. This allows the tip abutment member 60 to abut against the workpiece W at positions X,X that are eccentric from the axial line α of the cylinder section 12. This is particularly effective when the workpiece W has a complex shape and it is desired to apply an impact force to a portion where it is difficult to bring the tip abutment member 60 into linear contact on the axial line α. Specifically, the impact force can be applied along the impact axis β at positions X,X.

[0035] In particular, in the case of the tip tool 2, whose tip is an irregular shape that is not linear in the front-rear direction, the mass of the tip tool 2 becomes large and the impact force applied from the hammer 13 is greatly attenuated. However, since the tip tool 2 is divided into the collision member 20, the intermediate member 40, and the tip abutment member 60, the mass of each member can be kept small, so that the impact force can be transmitted to the workpiece W without being reduced.

[0036] Example 3 As shown in FIG. 4, the tip tool 3 for a pneumatic impact tool is such that, of the intermediate members 40 in the first embodiment, the one adjacent to the tip abutment member 30 is an intermediate member 70.

[0037] The intermediate member 70 has an axial center line of the rear end (i.e., the axial center line α of the cylinder portion 12) that is eccentric to the axial center line of the tip end (i.e., the impact axis β). This allows the tip abutment member 60 to abut against the workpiece W at position Y that is eccentric from the axis of the cylinder portion 12. In this way, when it is desired to apply an impact force to a portion of the workpiece W that has a complex shape and where it is difficult to abut the tip abutment member 60 linearly in the front-rear direction, and when changing the shape of the tip abutment member 30 would cause the mass of the tip abutment member 30 to become too large, the intermediate member 70 can be used to suppress imbalance in the mass of each member.

[0038] In the above embodiment, the dimensions and shapes of each part can be freely selected as appropriate. For example, the manner in which the collision member 20, the tip abutment member 30, and the intermediate member 40 are connected by the connecting member 50 is not particularly limited, and the shape, attachment position, number, etc. of the locking member can be freely selected as long as the two members contained in the storage space S do not come off and can collide with each other. In addition, the end surface shapes of the collision member 20, the tip abutment member 30, and the intermediate member 40 are desirably spherical in order to minimize the transmission loss of the impact force as much as possible, but the present invention is not limited thereto, and they may be flat. In addition, the driving source of the impact tool is not limited to an air source, and may be an electric power source. [Explanation of symbols]

[0039] 1,2,3 Tips for air-powered impact tools 10 Air impact tool 11 Tool body 12 Cylinder section 13 Hammer 20 Collision member 30,60 Tip abutment member 40,70 Intermediate member 41 Locking groove 50 Connection member 51 Main body 52 Locking member insertion hole 55 Locking screw (locking member) Double work

Claims

1. An impact tool tip tool is provided at a tip of an impact tool that includes a tool body, a hammer reciprocating within the tool body, and the impact tool reciprocates the hammer using a drive source introduced from outside the tool body to generate an impact force and apply an impact to a workpiece, the tip tool being attached to the tip of the impact tool to apply an impact to a predetermined workpiece, a collision member against which the hammer strikes; A tip abutment member configured separately from the collision member; one or more intermediate members arranged in series between the collision member and the tip abutment member; a connecting member that connects adjacent members in the collision member, the intermediate member, and the tip abutment member; Equipped with A tip for an impact tool, characterized in that

2. a cylinder portion is disposed within the tool body, and the hammer reciprocates within the cylinder portion, and the hammer reciprocates using compressed air introduced from outside the tool body as the driving source; The tip abutment member abuts against the workpiece at a position eccentric to the axis of the cylinder portion. The impact tool tip according to claim 1.

3. The impact member, the intermediate member, and the tip abutment member each have a mass equal to that of the hammer. The impact tool tip according to claim 1 or 2.

4. A connecting member used in the impact tool tip tool according to claim 1, The device includes a cylindrical body having an internal space, the main body portion has an internal space in which ends of two adjacent members among the collision member, the intermediate member, and the tip abutment member are accommodated, A locking member is provided which protrudes from the outside of the main body into the internal space and locks a member housed in the internal space. A connecting member characterized by:

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