JP3510963B2 - Jigsaw - Google Patents

Description

BACKGROUND OF THE INVENTION [0001] [Technical Field of the Invention The present invention relates to a jigsaw provided with a sliding member capable of mounting the blade. 2. Description of the Related Art The above-mentioned jigsaw converts the rotation of a motor shaft into reciprocating motion of a slide member such as a slider or a plunger via a crank mechanism, and integrally reciprocates a blade mounted on the slide member. The housing supports a guide member which guides the slide member in a reciprocating manner by passing the slide member in a cross shape. Since the guide member requires durability for its use, a metal member is generally used. The guide member is supported by projecting a support portion facing the inner surface of the housing, and inserting and fixing both ends of the guide member to the support portion. [0003] A gap is easily formed between the guide member and the support portion due to a molding error. Therefore, the guide member and the support portion collide with the reciprocation of the slide member. Generate noise and vibration. Further, there is a fear that the collision with the guide member may cause deformation or damage on the support portion side. Further, since the guide member is not fixed at a fixed position due to the play due to the gap, the slide member may be twisted, which may hinder reciprocation. [0004] The present invention is di effectively absorb looseness between the guide member and the support portion, the generation of noise and vibration of course, that can be solved also decreased deformation and guide function of the support portion
It is intended to provide gusso . [0005] In order to achieve the above object, an invention according to claim 1 is provided in a body formed by assembling a pair of left and right half halves. A jigsaw provided with a reciprocally movable slide member, a guide member for guiding the reciprocal movement of the slide member, and a support portion for supporting the guide member, wherein the support portion is provided vertically on the left and right housings. Two pairs of insertion holes are formed facing each other, and the insertion holes have a horizontally long and spherical end.
Both ends of the guide member are loosely inserted, and the slide member is penetrated orthogonally through the pair of upper and lower guide members, while the bottom of each of the insertion holes is slightly smaller than the cross-sectional outer shape of the guide member in the lateral direction. Insert a large circular O-ring,
The guide member is held via the O-ring. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partial explanatory view of the jigsaw 1,
A motor 5 is horizontally disposed in a main body 4 formed by assembling a pair of half housings 2 and 3, and a motor shaft 6 is supported by a ball bearing 8 in a bearing case 7 so as to be forward ( (Right side of the figure). A pin 9 above and parallel to the motor shaft 6 is inserted into the bearing case 7, and a gear 10 is loosely fitted to the pin 9 and meshes with the motor shaft 6. Further gear 10
A flanged sleeve 12 is rotatably connected via a pin 11 to an eccentric position from the pin 9 on the front surface of the bracket, and the flanged sleeve 12 is disposed on the front surface as shown in FIG. The slider 13 has a horizontally elongated hole 14 in which a blade (not shown) can be mounted. This long hole 14
The length is such that the left and right movement range of the flanged sleeve 12 that moves circularly about the pin 9 is allowed. The slider 13 comprises a pair of upper and lower slider guides 15, 1 held by left and right housings 2, 3, respectively.
5 penetrates orthogonally. This slider guide 15,
Reference numeral 15 denotes an assembled state of the housings 2 and 3, both ends of which are loosely inserted into insertion holes 16, 16 and 17, 17 as support portions projecting upward and downward of the left and right housings, respectively. At the bottom of each of the insertion holes 16, 17, O-rings 18, 18,... Having a circular cross section slightly larger than the cross-sectional outer shape of the slider guide 15 in the short direction are inserted and held. In a state where the slider guides 15 and 15 are inserted, as shown in FIG.
5 is deformed by contacting the peripheral edge of the spherical end portion, and the upper, lower, left and right directions and longitudinal direction of the slider guide 15 and the insertion holes 16
The backlash is absorbed by the clearance between the inner surface of the lens and the inner surface, thereby restricting the movement. In FIG. 1, reference numeral 19 denotes a balance plate in which a rear portion formed eccentrically with the pin 9 in the gear 10 is loosely inserted, and reference numeral 20 denotes a switch lever. In the jigsaw 1 configured as described above, when the motor 5 is driven by operating the switch lever 20, the gear 10 meshing with the motor shaft 6 rotates together with the balance plate 19 and is eccentrically provided on the gear 10. The flanged sleeve 12 circularly moves about the pin 9. Therefore, the slider 13 in which the flanged sleeve 12 freely passes through the elongated hole 14,
Since the amount of movement of the flanged sleeve 12 to the left and right is absorbed by the length of the left and right of the long hole 14, it reciprocates only according to the amount of movement up and down as shown by the solid line and the two-dot chain line in FIG. Will be. The slider guides 15 guide the reciprocating movement of the slider 13 up and down. The O-rings 18 set in the insertion holes 16 and 17 of the left and right housings 2 and 3 allow the sliders 15 and 15 to move vertically and horizontally and longitudinally. Since the sticking is absorbed and its movement is restricted, the slider guides 15, 15 collide with the walls of the insertion holes 16, 17 to generate noise and vibration, and the insertion holes 16, 17 are not deformed or damaged. Or cause it to occur. Further, since the slider guides 15 and 15 are fixed at appropriate positions, the sliders 13 are not displaced in the longitudinal direction to cause the slider 13 to be twisted, and the guide function is not affected. In particular, here, the O-rings 18 may be set in the insertion holes 16 and 17 of the housings 2 and 3 before the left and right housings 2 and 3 are assembled. Assembling work of the guides 15, 15 and the slider 13 does not require any special labor, the assembling work can be easily performed, and improvement in workability can be expected. According to the first aspect of the present invention, the use of the O-ring allows the O-ring to surround the spherical end of the guide member.
Because it deforms by contacting the edge, it can effectively absorb the rattling between the guide member and the insertion hole, prevent noise and vibration, and eliminate the deformation of the insertion hole and deterioration of the guide function. it can. Further, since the O-rings are inserted and held in the insertion holes, no special labor is required for assembling the O-rings, and the workability of the assembling is improved. Furthermore, since the guide member is fixed at two appropriate positions above and below the slide member, the slide member is not displaced in the longitudinal direction, causing a twist, and does not affect the guide function.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially sectional explanatory view of a jigsaw. FIG. 2 is an explanatory diagram of a slider portion. [Description of Signs] 1. Jigsaw, 2, 3. Housing, 5. Motor, 10. Gear, 12, Flanged sleeve, 13, Slider, 14, Slot, 15. Slider guide , 1
6, 17 ... insertion hole, 18 ... O-ring.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroki Ikuta 3-11-8 Sumiyoshicho, Anjo-shi, Aichi Prefecture Makita Co., Ltd. (56) References Japanese Utility Model 4-23272 (JP, U) Japanese Utility Model Hei 4-86118 (JP, U) Japanese Patent Publication No. 59-45851 (JP, B1) Real Public 7-8910 (JP, Y2) Real Public 54-41248 (JP, Y1) (58) Fields surveyed (Int .Cl. ⁷ , DB name) B27B 11/02 B27B 19/09

Claims (1)

(57) [Claim 1] A slide member capable of reciprocating in the axial direction and a reciprocating motion of the slide member are provided in a main body formed by assembling a pair of left and right half housings. A jigsaw provided with a guide member for guiding, and a support portion for supporting the guide member, wherein the support portion is formed as two sets of insertion holes formed to face each other on the upper and lower sides of the left and right housings. in landscape into the insertion hole
Both ends of a guide member having a spherical end are loosely inserted to allow the slide member to penetrate the pair of upper and lower guide members at right angles, while a short side of the guide member is provided at the bottom of each of the insertion holes. A jigsaw wherein an O-ring having a circular cross section slightly larger than a cross-sectional outer shape in a direction is inserted, and the guide member is held via the O-ring.